Gamma Chamaeleontis
Star in the constellation Chamaleon
From Wikipedia, the free encyclopedia
Gamma Chamaeleontis, Latinized from γ Chamaeleontis, is a solitary[9] star located in the southern circumpolar constellation of Chamaeleon. It can faintly be seen with the naked eye on a dark night, having an apparent visual magnitude of 4.12.[2] Based upon an annual parallax shift of 7.81 mas,[1] it is located around 418 light years from the Sun.
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 10h 35m 28.10720s[1] |
| Declination | −78° 36′ 28.0321″[1] |
| Apparent magnitude (V) | 4.12[2] |
| Characteristics | |
| Spectral type | K5 III[3] |
| U−B color index | +1.94[2] |
| B−V color index | +1.57[2] |
| Astrometry | |
| Radial velocity (Rv) | −22.4[4] km/s |
| Proper motion (μ) | RA: −37.61[1] mas/yr Dec.: +11.08[1] mas/yr |
| Parallax (π) | 7.81±0.12 mas[1] |
| Distance | 418 ± 6 ly (128 ± 2 pc) |
| Absolute magnitude (MV) | −1.43[5] |
| Details | |
| Radius | 67[6] R☉ |
| Luminosity | 864[7] L☉ |
| Temperature | 4,035[7] K |
| Other designations | |
| γ Cha, CD−77°454, FK5 401, HD 92305, HIP 51839, HR 4174, SAO 256731[8] | |
| Database references | |
| SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K5 III.[3] The measured angular diameter, after correction for limb darkening, is 4.86±0.05 mas.[10] At the estimated distance of the star, this yields a physical size of about 67 times the radius of the Sun.[6] It is a suspected variable star, with an amplitude of 0.01 magnitude.[11] The star radiates 864 times the solar luminosity from its outer atmosphere with an effective temperature of 4,053 K.[7]
