List of stars in Horologium
Encyclopedia
This is the list of notable star
s in the constellation
Horologium
, 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....
Horologium
Horologium
Horologium is a small and faint constellation in the southern sky . Its name is Latin for clock. It was created in the 18th century by Abbé Nicolas Louis de Lacaille, who originally named it Horologium Oscillitorium after the pendulum clock to honour its inventor, Christiaan Huygens...
, 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... |
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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α Hor Alpha Horologii Alpha Horologii is a giant yellow star in the constellation Horologium.-References:#... |
α | 66 | 26967 | 19747 | 3.85 | 1.07 | 117 | K1III | |||
R Hor R Horologii R Horologii is a red giant star approximately 100 light-years away in the constellation Horologium. It is also a Mira variable with a period of 407.6 days, and has one of the largest magnitude ranges known .- External links :* *... |
18242 | 13502 | 4.00 | 1004 | M7IIIe | 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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δ Hor | δ | 63 | 26612 | 19515 | 4.93 | 1.28 | 175 | A9V | |||
β Hor Beta Horologii Beta Horologii is the third brightest star in the constellation of Horologium. It is an A-type giant star with an apparent visual magnitude of approximately 4.979, and is a chemically peculiar star of the metallic-line type.-External links:*Jim Kaler's Stars, University of Illinois:... |
β | 32 | 18866 | 13884 | 4.98 | 0.07 | 313 | A5III | |||
μ Hor | μ | 33 | 19319 | 14240 | 5.12 | 1.99 | 138 | F0IV | |||
ζ Hor | ζ | 14 | 16920 | 12484 | 5.21 | 1.77 | 159 | F4IV | |||
ν Hor | ν | 21 | 17848 | 13141 | 5.25 | 1.73 | 165 | A2V | |||
η Hor | η | 11 | 16555 | 12225 | 5.30 | 2.06 | 145 | A6V | |||
68 | 27588 | 20161 | 5.33 | 1.08 | 231 | K2III | |||||
λ Hor | λ | 3 | 15233 | 11258 | 5.36 | 1.91 | 160 | F2III | |||
ι Hor Iota Horologii Iota Horologii is a solar twin, yellow dwarf star approximately 56 light-years away in the constellation of Horologium . The star is classified as a G0Vp yellow dwarf... |
ι | 17 | 17051 | 12653 | 5.40 | 4.22 | 56 | G3IV | 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 Iota Horologii b Iota Horologii b , often catalogued HR 810 b, is an extrasolar planet approximately 50 light-years away in the constellation of Horologium... ) |
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45 | 22231 | 16509 | 5.67 | 0.80 | 307 | K3III | |||||
TW Hor | 38 | 20234 | 14930 | 5.71 | −2.32 | 1315 | C5II | ||||
51 | 23719 | 17534 | 5.72 | 0.47 | 365 | K1III | |||||
γ Hor | γ | 20 | 17504 | 12871 | 5.73 | 2.03 | 179 | G8III/IV | |||
1 | 14641 | 10871 | 5.81 | −0.38 | 564 | K5III | |||||
40 | 20640 | 15305 | 5.84 | 0.03 | 473 | K2III | |||||
55 | 24706 | 18199 | 5.93 | 0.72 | 360 | K3III | |||||
TU Hor | 44 | 21981 | 16339 | 5.98 | 0.70 | 370 | A2V | ||||
23 | 18185 | 13387 | 6.03 | −0.12 | 553 | K1III | |||||
34 | 19948 | 14749 | 6.11 | 0.73 | 388 | K1III | |||||
18 | 17254 | 12775 | 6.15 | 0.68 | 404 | A2V | |||||
24 | 18265 | 13518 | 6.22 | −1.45 | 1113 | K4III | |||||
19 | 17326 | 12717 | 6.23 | 2.55 | 178 | F5V | |||||
7 | 16170 | 11925 | 6.24 | 2.60 | 174 | F6V | |||||
5 | 15646 | 11479 | 6.35 | 0.99 | 385 | A0V | |||||
65 | 26927 | 19721 | 6.36 | −1.07 | 1000 | K3III | |||||
TZ Hor | 4 | 15379 | 11293 | 6.39 | −0.86 | 921 | M5III | ||||
41 | 21011 | 15655 | 6.40 | 0.68 | 453 | K0III | |||||
25 | 18292 | 13429 | 6.47 | 0.71 | 463 | K0/K1III | |||||
50 | 23670 | 17493 | 6.49 | 0.53 | 508 | G8/K0III | |||||
43 | 21360 | 15884 | 6.50 | 0.87 | 435 | A0V | |||||
48 | 23308 | 17298 | 6.50 | 3.52 | 128 | F8V | |||||
GJ 1061 GJ 1061 GJ 1061 is a small red dwarf star approximately 12 light-years from Earth in the southern constellation of Horologium... |
13.03 | 12 | M5.5 | nearby red dwarf Red dwarf According to the Hertzsprung-Russell diagram, a red dwarf star is a small and relatively cool star, of the main sequence, either late K or M spectral type.... |