Mu2 Chamaeleontis

For other stars with this Bayer designation, see μ Chamaeleontis.
μ2 Chamaeleontis
Observation data
Epoch J2000      Equinox J2000
Constellation Chamaeleon
Right ascension 10h 04m 07.14960s[1]
Declination −81° 33′ 55.7280″[1]
Apparent magnitude (V) 6.60[2]
Characteristics
Spectral type G6/8 III[3]
U−B color index +0.53[4]
B−V color index +0.919±0.002[2]
Variable type Suspected[5]
Astrometry
Radial velocity (Rv)+3.30±1.65[1] km/s
Proper motion (μ) RA: −47.094[1] mas/yr
Dec.: 49.541[1] mas/yr
Parallax (π)5.8632 ± 0.0583 mas[1]
Distance556 ± 6 ly
(171 ± 2 pc)
Absolute magnitude (MV)0.59[2]
Details
Radius11.35+0.32
−0.16[1] R☉
Luminosity70.6±0.9[1] L☉
Temperature4,967+36
−69[1] K
Rotational velocity (v sin i)2.7±1.3[6] km/s
Other designations
CD−80°365, HD 88351, HIP 49326, HR 3997, SAO 258561[7]
Database references
SIMBADdata

Mu2 Chamaeleontis (μ2 Cha) is a star located in the constellation Chamaeleon. It is not bright enough to be readily visible to the naked eye, having an apparent visual magnitude of 6.60, but has an absolute magnitude of 0.59.[2] The distance to this object is approximately 556 light years, based on the star's parallax.[1] The star's radial velocity is poorly constrained, but it appears to be drifting further away at the rate of around +3 km/s.[1]

This object is an aging G-type giant star with a stellar classification of G6/8 III.[3] Having exhausted the supply of hydrogen at its core, the star has cooled and expanded until now it has 11 times the girth of the Sun.[1] It is a suspected variable star of unknown type.[5] The star is radiating 71 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,967 K.[1]

  1. ^ a b c d e f g h i j k l m Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference XHIP 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 Johnson was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference deMedeiros was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).