Iota Draconis
Encyclopedia
Iota Draconis is an orange giant
star
located 103 ly away in the constellation
Draco
. A visually unremarkable star of apparent magnitude
3.31, it has recently been discovered to have a planet
.
In Chinese
, , meaning Left Wall of Purple Forbidden Enclosure
, refers to an asterism consisting of ι Draconis, θ Draconis
, η Draconis
, ζ Draconis
, υ Draconis, 73 Draconis, γ Cephei and 23 Cassiopeiae. Consequently, ι Draconis itself is known as , representing , meaning Left Pivot. 左樞 (Zuǒshū) is westernized into Tsao Choo by R.H. Allen with the same meaning
It was called ' of Ulug Beg and the Dresden Globe, or 'Male hyena' by Kazwini.
Giant star
A giant star is a star with substantially larger radius and luminosity than a main sequence star of the same surface temperature. Typically, giant stars have radii between 10 and 100 solar radii and luminosities between 10 and 1,000 times that of the Sun. Stars still more luminous than giants are...
star
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...
located 103 ly away 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....
Draco
Draco (constellation)
Draco is a constellation in the far northern sky. Its name is Latin for dragon. Draco is circumpolar for many observers in the northern hemisphere...
. A visually unremarkable star of apparent magnitude
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...
3.31, it has recently been discovered to have a planet
Iota Draconis b
Iota Draconis b was discovered in 2002 during a radial velocity study of K-class giant stars and was the first planet discovered orbiting a giant star. It is in an eccentric orbit, which aided its detection as giant stars have pulsations which can mimic the presence of a planet.-External links:**...
.
Name
It has the traditional name Edasich, with Eldsich recorded in the Century Cyclopedia.In Chinese
Chinese language
The Chinese language is a language or language family consisting of varieties which are mutually intelligible to varying degrees. Originally the indigenous languages spoken by the Han Chinese in China, it forms one of the branches of Sino-Tibetan family of languages...
, , meaning Left Wall of Purple Forbidden Enclosure
Purple Forbidden enclosure
The Purple Forbidden enclosure is one of the San Yuan or Three enclosures. Stars and constellations of this group lie near the north celestial pole and visible all year from temperate latitudes in the Northern Hemisphere.-Asterisms:The asterisms are :...
, refers to an asterism consisting of ι Draconis, θ Draconis
Theta Draconis
Theta Draconis is a fourth-magnitude star in the constellation Draco.-Chinese name:In Chinese, , meaning Left Wall of Purple Forbidden Enclosure, refers to an asterism consisting of θ Draconis, ι Draconis, η Draconis, ζ Draconis, υ Draconis, 73 Draconis, γ Cephei and 23 Cassiopeiae...
, η Draconis
Eta Draconis
Eta Draconis is a star in the constellation Draco. Eta Draconis has apparent magnitude +2.73 and is a yellow giant variable star belonging to spectral class G8III. The luminosity of Eta Draconis is neary 50 times that of the Sun...
, ζ Draconis
Zeta Draconis
Zeta Draconis is a star in the constellation Draco. It shares the Arabic name Al dhi'bah with several other stars in the constellation, and, together with Eta Draconis, it also shares the name Al dhibain...
, υ Draconis, 73 Draconis, γ Cephei and 23 Cassiopeiae. Consequently, ι Draconis itself is known as , representing , meaning Left Pivot. 左樞 (Zuǒshū) is westernized into Tsao Choo by R.H. Allen with the same meaning
It was called ' of Ulug Beg and the Dresden Globe, or 'Male hyena' by Kazwini.