List of stars in Hydra
Encyclopedia
This is the list of notable star
s in the constellation
Hydra
, sorted by decreasing brightness.
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
s in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Hydra
Hydra (constellation)
Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees. It has a long history, having been included among the 48 constellations listed by the 2nd century astronomer Ptolemy. It is commonly represented as a water snake...
, sorted by decreasing brightness.
Name | B Bayer designation A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name... |
F Flamsteed designation Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek letters. Each star is assigned a number and the Latin genitive of the constellation it lies in... |
G. Gould designation Gould designations for stars are similar to Flamsteed designations in the way that they number stars within a constellation in increasing order of right ascension. Each star is assigned an integer , followed by " G. " , and then the Latin genitive of the constellation it lies in... |
HD Henry Draper Catalogue The Henry Draper Catalogue is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension , published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the... |
HIP | RA Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:... |
Dec Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and... |
vis. mag. Apparent magnitude The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere... |
abs. mag. Absolute magnitude Absolute magnitude is the measure of a celestial object's intrinsic brightness. it is also the apparent magnitude a star would have if it were 32.6 light years away from Earth... |
Dist. (ly) | Sp. class Stellar classification In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure... |
Notes |
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Alphard Alphard Alphard is the brightest star in the constellation Hydra. The name Alphard is from the Arabic الفرد , "the solitary one", there being no other bright stars near it. It was also known as the "backbone of the Serpent" to the Arabs. In ancient China it formed part of an asterism called the "red bird"... |
α | 30 | 140 | 81797 | 46390 | 1.99 | −1.69 | 177 | K3III | Alfard, Kalbelaphard, Cor Hydrae, Soheil al Fard, Soheil Solitarius | ||
γ Hya Gamma Hydrae Gamma Hydrae is a Class G8, third-magnitude star in the constellation Hydra. Gamma Hydrae is a yellow giant, located about 130 light-years from Earth.-Modern legacy:γ Hya appears on the flag of Brazil, symbolising the state of Acre.... |
γ | 46 | 345 | 115659 | 64962 | 2.99 | −0.05 | 132 | G8III | |||
ζ Hya Zeta Hydrae Zeta Hydrae is a Class G9, third-magnitude star in the constellation Hydra. Zeta Hydrae is a yellow giant star located about 150 light-years from Earth.-Name and etymology:... |
ζ | 16 | 77 | 76294 | 43813 | 3.11 | −0.21 | 151 | G8III-IV | |||
ν Hya Nu Hydrae Nu Hydrae is a Class K2, third-magnitude star in the constellation Hydra. Nu Hydrae is an orange giant star located about 140 light-years from Earth.... |
ν | 254 | 93813 | 52943 | 3.11 | −0.03 | 138 | K0/K1III | ||||
π Hya Pi Hydrae Pi Hydrae is a Class K2, third-magnitude star in the constellation Hydra. Pi Hydrae is an orange giant star located about 100 light-years from Earth.... |
π | 49 | 368 | 123123 | 68895 | 3.25 | 0.79 | 101 | K2III | |||
ε Hya Epsilon Hydrae Epsilon Hydrae is a Class G5, third-magnitude star in the constellation Hydra. Epsilon Hydrae is a binary star with components of magnitudes 3.3 and 6.8, separated by 2.7 arcseconds... |
ε | 11 | 59 | 74874 | 43109 | 3.38 | 0.29 | 135 | G0III-IV | BY Draconis variable BY Draconis variable BY Draconis variables are main sequence variable stars of late spectral types, usually K or M. The name comes from the archetype for this category of variable star system, BY Draconis. They exhibit variations in their luminosity due to rotation of the star coupled with star spots, and other... |
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ξ Hya Xi Hydrae Xi Hydrae is a third-magnitude star in the constellation Hydra. The star is situated 130 light-years from Earth, and has a radius about 10 times that of the Sun, and a luminosity nearly 60 times as large... |
ξ | 288 | 100407 | 56343 | 3.54 | 0.55 | 129 | G8III | ||||
λ Hya | λ | 41 | 201 | 88284 | 49841 | 3.61 | 0.88 | 115 | K0III | |||
μ Hya | μ | 42 | 221 | 90432 | 51069 | 3.83 | −0.58 | 248 | K4III | |||
θ Hya | θ | 22 | 108 | 79469 | 45336 | 3.89 | 0.91 | 129 | B9.5V | |||
ι Hya | ι | 35 | 170 | 83618 | 47431 | 3.90 | −0.74 | 276 | K3IIIvar | Ukdah | ||
HD 71155 | c | 19 | 71155 | 41307 | 3.91 | 0.99 | 125 | A0V | ||||
υ1 Hya Upsilon1 Hydrae Upsilon1 Hydrae is a yellow giant star in the constellation of Hydra. The star is one of Okayama Planet Search's main target for planet search and has turned out to host a substellar companion.-Substellar companion:... |
υ1 | 39 | 178 | 85444 | 48356 | 4.11 | −0.51 | 273 | G6/G8III | has a brown dwarf Brown dwarf Brown dwarfs are sub-stellar objects which are too low in mass to sustain hydrogen-1 fusion reactions in their cores, which is characteristic of stars on the main sequence. Brown dwarfs have fully convective surfaces and interiors, with no chemical differentiation by depth... companion |
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δ Hya Delta Hydrae Delta Hydrae is a Class A1, fourth-magnitude star in the constellation Hydra. Delta Hydrae is a binary double star, located about 180 light-years from Earth.-Name and etymology:... |
δ | 4 | 36 | 73262 | 42313 | 4.14 | 0.44 | 179 | A1Vnn | Lisan al Shudja, Lingua Hydri | ||
β Hya Beta Hydrae Beta Hydrae is a double star in the constellation of Hydra. Its overall apparent visual magnitude varies by 0.04 magnitudes with a period of 2.344 days, and is approximately 4.27 at maximum brightness. The brighter star in the double is a giant Bp star which has been classified as an... |
β | 301 | 103192 | 57936 | 4.29 | −0.96 | 365 | Ap Si | α2 CVn variable | |||
η Hya | η | 7 | 49 | 74280 | 42799 | 4.30 | −1.48 | 466 | B3V... | β Cep variable Beta Cephei variable Beta Cephei variables are variable stars which exhibit variations in their brightness due to pulsations of the stars' surfaces. The point of maximum brightness roughly corresponds to the maximum contraction of the star. Typically, Beta Cephei variables change in brightness by 0.01 to 0.3... |
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12 Hya | D | 12 | 60 | 74918 | 43067 | 4.32 | 0.11 | 227 | G8III | |||
ρ Hya | ρ | 13 | 64 | 75137 | 43234 | 4.35 | −0.72 | 337 | A0Vn | |||
58 Hya | E | 58 | 387 | 130694 | 72571 | 4.42 | −0.44 | 305 | K3III | |||
σ Hya Sigma Hydrae Sigma Hydrae is the 4th-magnitude star in the constellation Hydra. Sigma Hydrae belongs to spectral class K1+III and has apparent magnitude +4.44... |
σ | 5 | 42 | 73471 | 42402 | 4.45 | −0.72 | 352 | K2III | Minhar al Shija, Al Minliar al Shuja, Minchir | ||
τ2 Hya Tau Hydrae The Bayer designation Tau Hydrae is shared by two star systems, τ¹ Hydrae and τ² Hydrae, in the constellation Hydra... |
τ2 | 32 | 152 | 82446 | 46776 | 4.54 | −1.20 | 459 | A3V | Ukdah | ||
τ1 Hya Tau Hydrae The Bayer designation Tau Hydrae is shared by two star systems, τ¹ Hydrae and τ² Hydrae, in the constellation Hydra... |
τ1 | 31 | 145 | 81997 | 46509 | 4.59 | 3.43 | 56 | F6V | Ukdah | ||
υ2 Hya | υ2 | 40 | 194 | 87504 | 49402 | 4.60 | −0.05 | 277 | B8V | |||
HD 74395 | F | 51 | 74395 | 42835 | 4.63 | −1.71 | 604 | G2Ib | ||||
2 Sex | 2 | 168 | 83425 | 47310 | 4.68 | 0.06 | 274 | K3III | ||||
ο Hya | ο | 293 | 101431 | 56922 | 4.70 | −1.21 | 495 | B9V | ||||
141 G. Hya | G | 141 | 81799 | 46371 | 4.72 | 1.06 | 176 | K1III | ||||
174 G. Hya | I | 174 | 83953 | 47522 | 4.76 | −1.16 | 497 | B5V | ||||
26 Hya | 26 | 122 | 80499 | 45751 | 4.77 | −0.19 | 320 | G8III | ||||
51 Hya | k | 51 | 375 | 125932 | 70306 | 4.78 | 1.14 | 175 | K3III | |||
27 Hya 27 Hydrae 27 Hydrae is an evolved yellow giant star in the constellation of Hydra. The star is suspected to host a low-mass companion.-Substellar companion:... |
P | 27 | 124 | 80586 | 45811 | 4.80 | 0.43 | 243 | G8III-IV+... | unconfirmed planet Planet A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,... ? |
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9 Hya | 9 | 47 | 74137 | 42662 | 4.87 | 0.89 | 204 | K0IIICN... | ||||
181 G. Hya | 181 | 85859 | 48559 | 4.87 | −0.19 | 336 | K2III | |||||
241 G. Hya | 241 | 92036 | 51979 | 4.87 | −0.97 | 479 | M1III | |||||
U Hya | 240 | 92055 | 52009 | 4.89 | −1.16 | 528 | C | 240 G. Hya. Carbon star Carbon star A carbon star is a late-type star similar to a red giant whose atmosphere contains more carbon than oxygen; the two elements combine in the upper layers of the star, forming carbon monoxide, which consumes all the oxygen in the atmosphere, leaving carbon atoms free to form other carbon compounds,... |
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φ Hya | φ, φ3 | 242 | 92214 | 52085 | 4.91 | 0.72 | 225 | G8III | 242 G. Hya | |||
χ1 Hya | χ1 | 264 | 96202 | 54204 | 4.92 | 1.73 | 142 | F3IV/V | ||||
175 G. Hya | 175 | 84117 | 47592 | 4.93 | 4.07 | 49 | G0V | nearby | ||||
17 Crt | 17 | 284 | 100286 | 56280 | 4.93 | 2.80 | 87 | F8V | ||||
183 G. Hya | 183 | 85951 | 48615 | 4.94 | −1.74 | 706 | K5III | |||||
ψ Hya | ψ | 45 | 341 | 114149 | 64166 | 4.94 | 0.69 | 231 | K0III | |||
l Hya | l | 52 | 379 | 126769 | 70753 | 4.97 | −0.56 | 415 | B7/B8V | |||
6 Hya | a | 6 | 44 | 73840 | 42509 | 4.98 | −0.57 | 419 | K3III | |||
ω Hya | ω | 18 | 95 | 77996 | 44659 | 4.99 | −2.86 | 1212 | K2II-III | |||
160 G. Hya | 160 | 82734 | 46880 | 5.02 | −0.03 | 334 | K0III | |||||
κ Hya | κ | 38 | 173 | 83754 | 47452 | 5.07 | −0.92 | 515 | B4IV/V | Al Sharāsīf | ||
50 Hya | 50 | 370 | 124206 | 69415 | 5.07 | 0.83 | 229 | K2III | ||||
44 Hya | 44 | 230 | 91550 | 51718 | 5.08 | −1.36 | 633 | K5III | ||||
II Hya (298 G. Hya) | 298 | 102620 | 57613 | 5.10 | −0.72 | 477 | M4III | |||||
287 G. Hya | 287 | 100393 | 56332 | 5.13 | −0.58 | 453 | M1/M2III | |||||
54 Hya | m | 54 | 382 | 129926 | 72197 | 5.15 | 2.73 | 99 | F0V + G/K | |||
295 G. Hya | 295 | 101666 | 57047 | 5.20 | −0.40 | 430 | K5III | |||||
47 Hya | 47 | 365 | 121847 | 68269 | 5.20 | 0.11 | 339 | B8V | ||||
257 G. Hya | b3 | 257 | 94388 | 53252 | 5.23 | 2.75 | 102 | F6V | ||||
56 Hya | 56 | 385 | 130259 | 72357 | 5.23 | 0.19 | 331 | G8/K0III | ||||
23 Hya | 23 | 112 | 79910 | 45527 | 5.24 | 0.58 | 279 | K2III | ||||
303 G. Hya | 303 | 103462 | 58082 | 5.26 | 0.48 | 295 | G8III | |||||
61 G. Hya | 61 | 74988 | 43142 | 5.28 | 0.19 | 339 | A3V | |||||
14 Hya | 14 | 67 | 75333 | 43305 | 5.30 | −0.34 | 438 | B9MNp... | KX Hya; α2 CVn variable | |||
200 G. Hya | 200 | 88215 | 49809 | 5.30 | 3.12 | 89 | F2/F3IV/V | |||||
1 G. Hya | 1 | 68312 | 40107 | 5.36 | 0.43 | 316 | G8III | |||||
142 G. Hya | 142 | 81809 | 46404 | 5.38 | 2.91 | 102 | G2V | |||||
328 G. Hya | 328 | 109799 | 61621 | 5.41 | 2.72 | 113 | F0V | |||||
271 G. Hya | 271 | 96819 | 54477 | 5.43 | 1.61 | 189 | A1V | |||||
249 G. Hya | b1 | 249 | 93397 | 52737 | 5.44 | 1.30 | 219 | A3V | ||||
330 G. Hya | 330 | 110666 | 62131 | 5.46 | 0.03 | 397 | K3III | |||||
20 Hya | 20 | 103 | 78732 | 44961 | 5.47 | −1.00 | 642 | G8II | ||||
367 G. Hya HD 122430 HD 122430 is an orange giant star about 440 light years away in the constellation of Hydra on the celestial sphere. The star has completely run out of the hydrogen fuel that keeps it stable, although its age is only 3.1 billion years old, younger than the Sun’s 4.6 billion years. HD 122430 has a... |
367 | 122430 | 68581 | 5.47 | −0.15 | 434 | K2/K3III | has a planet Extrasolar planet An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars... (b HD 122430 b HD 122430 b is a giant planet orbiting around the giant star HD 122430. It has a mass at least 3.71 times that of Jupiter. This planet located at a distance of 1.02 astronomical units away from its star, which is very similar to the Earth’s distance from the Sun. Despite of this, the higher... ) |
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24 Hya | 24 | 114 | 79931 | 45526 | 5.49 | −1.14 | 689 | B9III | ||||
15 Hya | 15 | 70 | 75737 | 43496 | 5.55 | −0.33 | 488 | A4m | ||||
33 Hya | A | 33 | 163 | 82870 | 46982 | 5.56 | −1.04 | 681 | K1III | Ukdah | ||
323 G. Hya | 323 | 108323 | 60735 | 5.56 | −0.42 | 511 | B9V | |||||
224 G. Hya | 224 | 90957 | 51364 | 5.58 | 0.21 | 387 | K3III | |||||
195 G. Hya | 195 | 87808 | 49569 | 5.59 | 0.48 | 343 | K4III | |||||
225 G. Hya | 225 | 91120 | 51491 | 5.59 | −0.28 | 487 | B8/B9IV/V | |||||
2 Hya | 2 | 23 | 71297 | 41375 | 5.60 | 1.97 | 173 | A5III-IV | LM Hya; δ Sct variable Delta Scuti variable A Delta Scuti variable is a variable star which exhibits variations in its luminosity due to both radial and non-radial pulsations of the star's surface. Typical brightness fluctuations are from 0.003 to 0.9 magnitudes in V over a period of a few hours, although the amplitude and period of the... |
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19 Hya | 19 | 99 | 78556 | 44883 | 5.60 | −1.60 | 898 | B9.5III | ||||
28 Hya | 28 | 134 | 81420 | 46221 | 5.60 | −0.98 | 675 | K5III | ||||
1 Hya | 1 | 15 | 70958 | 41211 | 5.61 | 3.44 | 89 | F3V | ||||
55 Hya | 55 | 384 | 130158 | 72323 | 5.61 | −0.76 | 613 | B9IV/V | ||||
92 G. Hya | 92 | 77353 | 44356 | 5.64 | −0.73 | 613 | K0III | |||||
333 G. Hya | 333 | 111295 | 62500 | 5.65 | 0.80 | 304 | G8III | |||||
59 Hya | 59 | 392 | 132219 | 73284 | 5.65 | 0.50 | 350 | A6IV | ||||
148 G. Hya | 148 | 82077 | 46511 | 5.66 | −1.58 | 913 | K4/K5III | |||||
χ2 Hya | χ2 | 265 | 96314 | 54255 | 5.69 | −1.26 | 799 | B8V | 265 G. Hya.; β Lyr variable Beta Lyrae variable Beta Lyrae variables are a class of close binary stars. Their total brightness is variable because the two component stars orbit each other, and in this orbit one component periodically passes in front of the other one, thereby blocking its light. The two component stars of Beta Lyrae systems are... |
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350 G. Hya | 350 | 117716 | 66065 | 5.69 | 1.61 | 214 | A0/A1V | |||||
56 G. Hya | 56 | 74794 | 43026 | 5.70 | 1.04 | 278 | K0III: | |||||
193 G. Hya | 193 | 87427 | 49339 | 5.70 | 1.23 | 255 | F0V | |||||
259 G. Hya | 259 | 95221 | 53699 | 5.70 | 2.27 | 159 | F2V | |||||
236 G. Hya | 236 | 91889 | 51933 | 5.71 | 3.76 | 80 | F7V | |||||
291 G. Hya | 291 | 100893 | 56620 | 5.71 | 0.54 | 352 | K0III | |||||
3 Hya | 3 | 35 | 72968 | 42146 | 5.72 | 1.14 | 268 | A1spe... | HV Hya; α2 CVn variable | |||
107 G. Hya | 107 | 79181 | 45158 | 5.72 | 0.90 | 300 | G8III | |||||
102 G. Hya | 102 | 78702 | 44923 | 5.73 | 1.22 | 260 | A0/A1V | |||||
351 G. Hya | 351 | 118349 | 66400 | 5.73 | 0.36 | 386 | A7V+... | |||||
17 G. Hya | 17 | 71095 | 41299 | 5.74 | −0.59 | 601 | K5III | |||||
156 G. Hya | 156 | 82573 | 46813 | 5.74 | 0.58 | 351 | A4III | |||||
80 G. Hya | 80 | 76376 | 43798 | 5.75 | 0.17 | 425 | K2/K3III | |||||
101 G. Hya | 101 | 78668 | 44936 | 5.76 | 0.01 | 460 | G6III | |||||
57 Hya | 57 | 386 | 130274 | 72378 | 5.76 | 0.14 | 434 | B9.5V | ||||
48 Hya | 48 | 366 | 122066 | 68390 | 5.77 | 1.98 | 187 | F6V | ||||
121 G. Hya | 121 | 80479 | 45743 | 5.79 | 0.34 | 400 | K1/K2III | |||||
272 G. Hya | 272 | 97023 | 54561 | 5.79 | 0.69 | 342 | A1V | |||||
33 G. Hya | 33 | 72660 | 42028 | 5.80 | 0.80 | 326 | A1V | |||||
88 G. Hya | 88 | 76932 | 44075 | 5.80 | 4.16 | 70 | F7/F8IV/V | |||||
354 G. Hya | 354 | 118646 | 66563 | 5.81 | 2.36 | 160 | F3V | |||||
357 G. Hya | 357 | 119752 | 67143 | 5.81 | 1.08 | 287 | A0V | |||||
118 G. Hya | 118 | 80050 | 45559 | 5.83 | 0.44 | 389 | K0III | |||||
60 Hya | 60 | 393 | 132851 | 73566 | 5.83 | 0.84 | 325 | A4IV | ||||
300 G. Hya | 300 | 103026 | 57841 | 5.85 | 3.36 | 102 | F8V | |||||
150 G. Hya | 150 | 82232 | 46618 | 5.86 | 1.45 | 249 | K2III | |||||
329 G. Hya | 329 | 109960 | 61720 | 5.86 | −0.26 | 547 | K2/K3III | |||||
252 G. Hya | 252 | 93657 | 52841 | 5.87 | 0.29 | 426 | A1V | |||||
374 G. Hya | 374 | 125276 | 69965 | 5.87 | 4.62 | 58 | F7Vw | |||||
32 G. Hya 32 G. Hydrae 32 G. Hydra is a G-type giant in the constellation Hydra.... |
32 | 72561 | 42008 | 5.89 | −5.22 | 5433 | G5III | |||||
14 G. Hya | 14 | 70652 | 41080 | 5.92 | −1.11 | 832 | M1III | |||||
162 G. Hya | 162 | 82747 | 46897 | 5.92 | 1.12 | 297 | B9.5V | |||||
304 G. Hya | 304 | 103596 | 58158 | 5.93 | 0.11 | 477 | K4III | |||||
84 G. Hya | 84 | 76579 | 43899 | 5.95 | −0.82 | 738 | K3III | |||||
158 G. Hya | 158 | 82660 | 46859 | 5.95 | −1.06 | 823 | K4III | |||||
289 G. Hya HR 4458 HR 4458 is a binary star system in the constellation Hydra. At a distance of 31 light years, they are the closest stars to the solar system within this constellation. The pair has an angular separation of 16.2″.... |
289 | 100623 | 56452 | 5.96 | 6.06 | 31 | K0V | |||||
27 G. Hya | 27 | 71766 | 41597 | 6.01 | −1.39 | 985 | F2III | |||||
75 G. Hya | 75 | 76151 | 43726 | 6.01 | 4.85 | 56 | G3V | |||||
136 G. Hya | 136 | 81567 | 46288 | 6.01 | −1.14 | 876 | K3III | |||||
209 G. Hya | 209 | 89455 | 50536 | 6.01 | 1.89 | 217 | A8III | |||||
φ2 Hya | φ2 | 234 | 91880 | 51905 | 6.01 | −1.35 | 967 | M1III | ||||
16 G. Hya | 16 | 70937 | 41214 | 6.03 | 1.98 | 211 | F2V | |||||
6 G. Hya | 6 | 70013 | 40818 | 6.04 | −0.21 | 579 | G8III | |||||
227 G. Hya | 227 | 91280 | 51551 | 6.04 | 2.90 | 138 | F6/F7V | |||||
243 G. Hya | 243 | 92245 | 52113 | 6.04 | 0.83 | 359 | A0Vn | |||||
361 G. Hya | 361 | 121156 | 67890 | 6.05 | 2.04 | 206 | K2III | |||||
260 G. Hya | 260 | 95456 | 53818 | 6.06 | 3.59 | 102 | F8V | |||||
90 G. Hya | 90 | 77250 | 44315 | 6.08 | −0.84 | 789 | F3IV+... | |||||
179 G. Hya | 179 | 85519 | 48396 | 6.08 | 0.66 | 395 | K0III | |||||
65 G. Hya | 65 | 75140 | 43204 | 6.09 | −0.46 | 667 | K0 | |||||
322 G. Hya | 322 | 108110 | 60603 | 6.09 | −0.38 | 643 | K3III | |||||
21 Hya | 21 | 106 | 79193 | 45184 | 6.10 | 1.51 | 269 | A3m | KW Hya; Algol variable Algol variable Algol variables or Algol-type binaries are a class of eclipsing binary stars where the orbital plane of the stars are coincident with the line of sight from Earth. When the cooler component passes in front of the hotter one, part of the latter's light is blocked, and the total brightness of the... |
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231 G. Hya | 231 | 91706 | 51795 | 6.10 | 2.09 | 207 | F6V | |||||
372 G. Hya | 372 | 124576 | 69623 | 6.10 | −0.54 | 695 | A1V | |||||
155 G. Hya | 155 | 82543 | 46840 | 6.11 | 0.58 | 416 | F7IV-V | |||||
OY Hya (188 G. Hya) | 188 | 86612 | 48943 | 6.11 | −0.31 | 628 | B5V | Be star Be star A Be star is a B-type star with prominent emission lines of hydrogen in its spectrum. The designation is combined by the spectral class, B, and the lowercase e denoting emission in the spectral classification system. Line emission from other atomic ions might be present as well, but is typically... |
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9 G. Hya | 9 | 70148 | 40859 | 6.12 | 0.12 | 516 | K2III | |||||
73 G. Hya | 73 | 75916 | 43580 | 6.12 | 1.04 | 338 | K1III | |||||
154 G. Hya | 154 | 82477 | 46768 | 6.12 | 0.92 | 358 | K0 | |||||
157 G. Hya | 157 | 82638 | 46869 | 6.12 | 0.72 | 393 | K0 | |||||
217 G. Hya | 217 | 89911 | 50790 | 6.12 | −0.55 | 704 | A0V | |||||
10 Hya | 10 | 52 | 74591 | 42931 | 6.13 | 2.12 | 207 | A6V | ||||
81 G. Hya | 81 | 76494 | 43902 | 6.13 | −1.34 | 1016 | G8II-III | |||||
153 G. Hya | 153 | 82428 | 46744 | 6.13 | 2.46 | 177 | F0Vn | |||||
13 G. Hya | 13 | 70574 | 41036 | 6.14 | 2.07 | 212 | A8IV | |||||
105 G. Hya | 105 | 79108 | 45167 | 6.14 | 0.83 | 376 | A0V | |||||
146 G. Hya | 146 | 82043 | 46529 | 6.14 | 0.32 | 475 | F0III | |||||
MO Hya (334 G. Hya) | 334 | 111786 | 62788 | 6.14 | 2.24 | 196 | A0III | δ Sct variable | ||||
363 G. Hya | 363 | 121699 | 68177 | 6.14 | −0.17 | 596 | K2/K3III | |||||
286 G. Hya | 286 | 100307 | 56293 | 6.15 | −0.59 | 728 | M2III | |||||
NS Hya (96 G. Hya) | 96 | 78196 | 44738 | 6.16 | −1.25 | 991 | M1III | |||||
315 G. Hya | 315 | 105686 | 59307 | 6.16 | 1.14 | 329 | A0V | |||||
302 G. Hya | 302 | 103266 | 57971 | 6.17 | 1.78 | 246 | A2V | |||||
8 G. Hya | 8 | 70110 | 40858 | 6.18 | 3.13 | 133 | F9V | |||||
37 G. Hya | 37 | 73281 | 42299 | 6.18 | 0.79 | 391 | K0 | |||||
89 G. Hya | 89 | 77084 | 44162 | 6.19 | 3.20 | 129 | F5IV/V | |||||
359 G. Hya | 359 | 120455 | 67523 | 6.19 | 0.97 | 361 | A0V | |||||
LV Hya (305 G. Hya) | 305 | 103789 | 58272 | 6.20 | 0.88 | 378 | B9.5V | α2 CVn variable | ||||
261 G. Hya | 261 | 95698 | 53963 | 6.21 | 2.59 | 173 | A9III/IV | |||||
356 G. Hya | 356 | 119623 | 67071 | 6.21 | −0.47 | 706 | K3III | |||||
58 G. Hya | 58 | 74860 | 43035 | 6.22 | −4.13 | 3835 | K5III | |||||
182 G. Hya | 182 | 85905 | 48584 | 6.23 | 0.50 | 457 | A2/A3III | |||||
205 G. Hya | 205 | 88699 | 50066 | 6.23 | 0.74 | 409 | A9m... | |||||
311 G. Hya | 311 | 105078 | 59008 | 6.23 | −0.51 | 728 | B7V | |||||
371 G. Hya | 371 | 124281 | 69458 | 6.23 | −0.46 | 709 | K0III | |||||
199 G. Hya | 199 | 88182 | 49802 | 6.24 | 1.74 | 259 | A5m | |||||
245 G. Hya | 245 | 92770 | 52391 | 6.24 | −0.53 | 738 | K3/K4III: | |||||
147 G. Hya | 147 | 82074 | 46543 | 6.25 | 2.57 | 177 | G6IV | |||||
159 G. Hya | 159 | 82674 | 46893 | 6.25 | 0.70 | 421 | K0 | |||||
197 G. Hya | 197 | 88025 | 49689 | 6.25 | 0.01 | 578 | A0V | |||||
149 G. Hya | 149 | 82180 | 46569 | 6.26 | −2.26 | 1646 | K2/K3III | |||||
144 G. Hya | 144 | 81980 | 46504 | 6.27 | 1.47 | 297 | F0Vn | |||||
185 G. Hya | 185 | 86266 | 48763 | 6.27 | 2.06 | 227 | A4V | |||||
391 G. Hya | 391 | 131919 | 73171 | 6.28 | 0.12 | 557 | B8/B9V | |||||
235 G. Hya | 235 | 91881 | 51885 | 6.29 | 3.07 | 143 | F5V | |||||
126 G. Hya | 126 | 80719 | 45854 | 6.30 | 2.88 | 158 | F6V | |||||
192 G. Hya | 192 | 87344 | 49321 | 6.30 | 0.47 | 477 | B8V | |||||
HQ Hya (7 G. Hya) | 7 | 69997 | 40766 | 6.31 | 1.14 | 353 | F3IIIp | δ Sct variable | ||||
37 Hya | 37 | 171 | 83650 | 47427 | 6.31 | −1.33 | 1098 | A0Vn | OW Hya; 171 G. Hya. | |||
337 G. Hya | 337 | 112519 | 63243 | 6.31 | 0.83 | 407 | K0III | |||||
111 G. Hya | 111 | 79752 | 45424 | 6.32 | 1.18 | 348 | A0V | |||||
292 G. Hya | 292 | 100953 | 56657 | 6.32 | 2.04 | 234 | F5V | |||||
165 G. Hya | 165 | 83104 | 47070 | 6.33 | 1.63 | 283 | A0V | |||||
71 G. Hya | 71 | 75811 | 43570 | 6.34 | 0.22 | 547 | A5V | |||||
104 G. Hya | 104 | 79066 | 45150 | 6.34 | 2.81 | 166 | A9IVe... | |||||
V335 Hya (316 G. Hya) | 316 | 106198 | 59588 | 6.34 | −0.89 | 911 | M4/M5Ib/II: | |||||
317 G. Hya | 317 | 106257 | 59622 | 6.34 | 0.86 | 406 | A0V | |||||
34 G. Hya | 34 | 72908 | 42142 | 6.35 | 0.21 | 551 | G9III | |||||
275 G. Hya | 275 | 97393 | 54725 | 6.35 | −0.23 | 676 | M2/M3III | |||||
369 G. Hya | 369 | 124162 | 69398 | 6.35 | 0.49 | 484 | K2III | |||||
373 G. Hya | 373 | 125279 | 69977 | 6.35 | −0.69 | 834 | K5III | |||||
206 G. Hya | 206 | 88806 | 50142 | 6.36 | −1.70 | 1336 | M1III | |||||
50 G. Hya | 50 | 74393 | 42854 | 6.37 | −0.40 | 738 | B9.5III-IV | |||||
172 G. Hya | 172 | 83731 | 47454 | 6.37 | −0.68 | 838 | A2V | |||||
29 G. Hya | 29 | 72462 | 41893 | 6.38 | 2.13 | 231 | A7IV/V | |||||
320 G. Hya | 320 | 107869 | 60468 | 6.39 | −0.57 | 803 | K5III | |||||
34 Hya | 34 | 167 | 83373 | 47249 | 6.40 | 1.10 | 375 | A1V | ||||
R Hya R Hydrae R Hydrae is a Mira-type variable star in the constellation Hydra.The magnitude of R Hydrae varies over a period of 389 days, between 3.21 and 11.00. The period of R Hydrae changes slowly.... |
347 | 117287 | 65835 | 6.40 | −2.55 | 2012 | M6/M7e | Mira variable Mira variable Mira variables , named after the star Mira, are a class of pulsating variable stars characterized by very red colors, pulsation periods longer than 100 days, and light amplitudes greater than one magnitude in infrared and 2.5 magnitude in visual... |
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55 G. Hya | 55 | 74688 | 42951 | 6.41 | 1.71 | 283 | F2+... | |||||
LO Hya (25 G. Hya) | 25 | 71663 | 41564 | 6.42 | 1.77 | 278 | A5m | |||||
66 G. Hya | 66 | 75217 | 43246 | 6.42 | 0.68 | 458 | K0 | |||||
308 G. Hya | 308 | 104039 | 58436 | 6.42 | −0.76 | 891 | A1IV/V | |||||
364 G. Hya | 364 | 121758 | 68224 | 6.42 | 0.17 | 579 | K1III | |||||
26 G. Hya | 26 | 71665 | 41547 | 6.43 | −0.65 | 849 | K0 | |||||
74 G. Hya | 74 | 76027 | 43623 | 6.43 | 0.89 | 417 | K1III | |||||
274 G. Hya | 274 | 97344 | 54703 | 6.43 | 0.84 | 427 | K0III | |||||
332 G. Hya | 332 | 111226 | 62448 | 6.43 | −0.66 | 853 | B8V | |||||
360 G. Hya | 360 | 120690 | 67620 | 6.43 | 4.93 | 65 | G5V | |||||
263 G. Hya | 263 | 95857 | 54030 | 6.44 | −0.38 | 753 | M2/M3III | |||||
279 G. Hya | 279 | 98221 | 55164 | 6.44 | 3.09 | 152 | F3V | |||||
281 G. Hya | 281 | 99712 | 55953 | 6.44 | −1.50 | 1264 | K4/K5III | |||||
294 G. Hya | 294 | 101563 | 57001 | 6.44 | 3.35 | 135 | G2III/IV | |||||
54 G. Hya | 54 | 74685 | 42981 | 6.45 | 0.93 | 414 | K0 | |||||
117 G. Hya | 117 | 79994 | 45543 | 6.45 | 1.19 | 368 | K0 | |||||
166 G. Hya | 166 | 83352 | 47242 | 6.45 | 0.74 | 452 | K0 | |||||
204 G. Hya | 204 | 88595 | 50013 | 6.45 | 3.33 | 137 | F7V | |||||
258 G. Hya | 258 | 94619 | 53387 | 6.45 | 0.00 | 637 | K1III | |||||
349 G. Hya | 349 | 117718 | 66060 | 6.45 | 3.08 | 154 | F5IV | |||||
48 G. Hya | 48 | 74190 | 42701 | 6.46 | 1.13 | 379 | A5m | |||||
109 G. Hya | 109 | 79481 | 45305 | 6.46 | 0.26 | 567 | G6/G8III/IV | |||||
325 G. Hya | 325 | 109074 | 61172 | 6.46 | 0.25 | 568 | A3V | |||||
82 G. Hya | 82 | 76478 | 43850 | 6.47 | −0.51 | 813 | K2III | |||||
213 G. Hya | 213 | 89816 | 50728 | 6.47 | 1.18 | 373 | A4IV/V | |||||
270 G. Hya | 270 | 96723 | 54430 | 6.47 | 0.74 | 457 | A1V | |||||
3 G. Hya | 3 | 68667 | 40263 | 6.48 | 0.47 | 519 | K0 | |||||
63 G. Hya | 63 | 75098 | 43152 | 6.48 | −0.36 | 762 | A2V | |||||
100 G. Hya | 100 | 78614 | 44888 | 6.48 | 1.07 | 394 | K0IIICN... | |||||
297 G. Hya | 297 | 102438 | 57507 | 6.48 | 5.23 | 58 | G5V | |||||
299 G. Hya | 299 | 102888 | 57749 | 6.48 | 0.57 | 495 | G8III | |||||
348 G. Hya | 348 | 117558 | 65969 | 6.48 | 1.78 | 284 | A1V | |||||
378 G. Hya | 378 | 126400 | 70538 | 6.48 | 2.05 | 251 | K0III | |||||
233 G. Hya | 233 | 91790 | 51852 | 6.49 | 2.20 | 235 | A5IV/V | |||||
312 G. Hya | 312 | 105113 | 59021 | 6.49 | 2.94 | 167 | G0V | |||||
342 G. Hya | 342 | 114576 | 64375 | 6.49 | 1.23 | 367 | A5V | |||||
346 G. Hya | 346 | 117033 | 65682 | 6.49 | −1.12 | 1087 | K5III | |||||
210 G. Hya | 210 | 89747 | 50693 | 6.50 | 2.68 | 189 | F3IV | |||||
318 G. Hya | 218 | 106500 | 59742 | 6.50 | 0.75 | 461 | K0III | |||||
29 Hya | 29 | 139 | 81728 | 46365 | 6.53 | −1.48 | 1304 | A2V | ||||
164 G. Hya HD 82943 HD 82943 is a yellow dwarf star approximately 89 light-years away in the constellation of Hydra. Two extrasolar planets have been confirmed to be orbiting it, and it is thought that the system had more giant planets that were "swallowed" by the parent star... |
164 | 82943 | 47007 | 6.54 | 4.35 | 90 | G0V | has two planets (b HD 82943 b HD 82943 b is an extrasolar planet approximately 89 light-years away in the constellation of Hydra. The planet was announced in 2000 by the Geneva Extrasolar Planet Search Team. The planet is the outermost planet of two.... & c HD 82943 c HD 82943 c is an extrasolar planet approximately 89 light-years away in the constellation of Hydra. The planet was announced in 2001 to be orbiting the yellow dwarf star HD 82943. The planet is the innermost planet of two.... ) |
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17 Hya | 17 | 79 | 76370 | 43822 | 6.67 | 1.72 | 319 | A3 | ||||
HD 90156 HD 90156 HD 90156 is a 7th magnitude G-type main sequence star located approximately 129 light years away in the constellation Hydra. This star is smaller, cooler, fainter, and less massive than our Sun. Also its metal content is over half as much as the Sun. In 2009, a gas giant planet was found in orbit... |
90156 | 50921 | 6.95 | 5.23 | 72 | G5V | has a planet (b HD 90156 b HD 90156 b is an extrasolar planet which orbits the G-type main sequence star HD 90156, located approximately 129 light years away in the constellation Hydra. This planet has at least 17.6 times the mass of Earth and takes over seven weeks to orbit the star at a semimajor axis of 0.264 AU... ); variable star |
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V Hya V Hydrae V Hydrae is a variable star in the constellation Hydra. It is considered by astronomers to be a carbon star. With a B-V colour index of +5.5 it is one of the reddest stars visible. It has a period of approximately 18 years and a sub-period of approximately 530 days.... |
47111 | 83085 | 7.0 | C | Carbon star | |||||||
25 Hya | 25 | 80105 | 45588 | 7.07 | 1.50 | 424 | K0 | |||||
HD 86264 HD 86264 HD 86264 is a 7th magnitude F-type main sequence star located approximately 237 light years away in the constellation Hydra. In August 2009, it was announced that an exoplanet was found in an eccentric orbit.... |
86264 | 48780 | 7.42 | 3.12 | 237 | F7V | has a planet (b HD 86264 b HD 86264 b is an extrasolar planet which orbits the F-type main sequence star HD 86264, located approximately 237 light years away in the constellation Hydra. This planet orbits in a very eccentric path around the star with a period of about four years. This planet can be as close as 0.86 AU to as... ) |
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HD 72659 HD 72659 HD 72659 is a yellow dwarf star in the Hydra constellation. The apparent magnitude is +7.48 and the distance is 168 light years away from Earth. An extrasolar planet was discovered orbiting this star in 2003.... |
72659 | 42030 | 7.48 | 3.93 | 168 | G0 | has a planet (b HD 72659 b HD 72659 b is a superjovian exoplanet massing at least 3.3 MJ orbiting at 4.77 AU from the star taking 3630 days to orbit. The orbital distance range from 3.49 AU to 6.05 AU with orbital eccentricity of 0.269.... ) |
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HD 74156 HD 74156 HD 74156 is a yellow dwarf star in the constellation of Hydra, 211 light years from our solar system. It is known to be orbited by two giant planets.- Star :... |
74156 | 42723 | 7.62 | 3.57 | 211 | G0V | has three planets (b HD 74156 b HD 74156 b is an extrasolar planet at least 1.88 times the mass of Jupiter that orbits the star HD 74156. It is most likely a gas giant. This planet was discovered in April 2001 by Dominique Naef and Michel Mayor along with the second planet HD 74156 c.... , c HD 74156 c HD 74156 c is an extrasolar planet at least eight times the mass of Jupiter orbiting the star HD 74156. It is most likely a gas giant. This planet was discovered by Dominique Naef and Michel Mayor in April 2001 together with the first planet HD 74156 b.... , & unconfirmed d) |
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φ1 Hya | φ1 | 43 | 91369 | 51614 | 7.62 | 3.25 | 244 | G2V | ||||
HD 86226 HD 86226 HD 86226 is a G type yellowish white star found in the constellation of Hydra. Due to the reactions it had when placed under a Doppler test, 13 Magellan Doppler Velocity observations were made of an object found near the star... |
86226 | 48739 | 7.93 | 4.79 | 139 | G2V | has a planet (b HD 86226 b This planet is a eccentric Jupiter gas giant discovered by the Magellan Planet Search Program in 2010.... ) |
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HD 70573 HD 70573 HD 70573 is a 9th magnitude star approximately 149 light-years away in the constellation of Hydra. The star is young, only 101 million years old.-Planetary system:... |
70573 | 8.70 | 5.40 | 149 | G1-1.5V | has a planet (b HD 70573 b HD 70573 b orbits the youngest RV host star HD 70573 approximately 149 light-years away in the constellation of Hydra. The discovery of the planet is important because it enables the study of debris disks around young stars in relation to presence of planets.... ) |
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Gliese 433 Gliese 433 Gliese 433 is a dim red dwarf star in the constellation of Hydra, roughly 29.5 light years away from Sun. Astronomers have announced the discovery of a very low-mass extrasolar planet in close orbit.-Planetary system:... |
56528 | 9.79 | 10.01 | 29 | M1.5 | has a planet (b) | ||||||
TW Hya TW Hydrae TW Hydrae is an orange dwarf star approximately 176 light-years away in the constellation of Hydra . The star is the closest T Tauri star to the Solar System. TW Hydrae is similar in mass to the Sun, but is only about 5-10 million years old... |
53911 | 11.1 | 7.3 | 184 | K8Ve | T Tauri star T Tauri star T Tauri stars are a class of variable stars named after their prototype – T Tauri. They are found near molecular clouds and identified by their optical variability and strong chromospheric lines.-Characteristics:... , retracted planet |
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WASP-25 | 11.87 | 5.74 | 550 | G4 | has a transiting planet (b) | |||||||
GJ 3634 GJ 3634 GJ 3634 is a red dwarf star in the Hydra constellation. One planet has been discovered in its orbit, GJ 3634 b. GJ 3634 is under half the mass and size of the Sun, and is estimated to be at least a billion years younger, and lies near to Earth, with a distance of 19.8 parsecs . It was targeted by... |
19.8 | 65 | M2.5 | has a planet (b GJ 3634 b GJ 3634 b is a Super-Earth in the orbit of the nearby red dwarf GJ 3634. The planet is approximately eight times the mass of Earth, and orbits its star every two and a half days at a distance of .0287 AU... ) |