Gamma Chamaeleontis

γ Chamaeleontis
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]
Distance418 ± 6 ly
(128 ± 2 pc)
Absolute magnitude (MV)−1.43[5]
Details
Radius67[6] R☉
Luminosity864[7] L☉
Temperature4,035[7] K
Other designations
γ Cha, CD−77° 454, FK5 401, HD 92305, HIP 51839, HR 4174, SAO 256731.[8]
Database references
SIMBADdata

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.

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]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Wielen1999 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggen1973 was invoked but never defined (see the help page).