| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 10h00m 43.7937s[1] |
| Declination | −82° 12′ 52.8125″[1] |
| Apparent magnitude (V) | 5.53[2] |
| Characteristics | |
| Spectral type | A0 IV[3] |
| U−B color index | +0.05[4] |
| B−V color index | +0.03[4] |
| Astrometry | |
| Radial velocity (Rv) | 16±10[5] km/s |
| Proper motion (μ) | RA: −26.011 mas/yr[1] Dec.: +31.141 mas/yr[1] |
| Parallax (π) | 8.0957 ± 0.0795 mas[1] |
| Distance | 403 ± 4 ly (124 ± 1 pc) |
| Absolute magnitude (MV) | +0.23[2] |
| Details | |
| Mass | 2.6[6] M☉ |
| Radius | 3.66[7] R☉ |
| Luminosity | 90.7[8] L☉ |
| Surface gravity (log g) | 3.73[6] cgs |
| Temperature | 10,141+157 −240[9] K |
| Metallicity [Fe/H] | −0.18[6] dex |
| Rotational velocity (v sin i) | 150[10] km/s |
| Other designations | |
μ1 Cha, CPD−81° 399, FK5 3980, HD 87971, HIP 49065, HR 3983, SAO 258554[11] | |
| Database references | |
| SIMBAD | data |
μ1 Chamaeleontis, LatinizedasMu1 Chamaeleontis, is a single[12] star in the southern circumpolar constellation Chamaeleon. It is dimly visible to the naked eye with an apparent visual magnitude of 5.53.[2] Based upon parallax measurements, it is located approximately 403 light-years away from the Sun.[1] The radial velocity is poorly constrained, but it appears to be drifting further away at the rate of about 16 km/s[5]
This object has a stellar classification of A0 IV,[3] matching an A-type subgiant star. It has 2.6 times the mass of the Sun[6] and an effective temperatureof10,141 K,[9] giving a bluish white glow. Due to its slightly enlarged radius,[7] the star has a luminosity over 90 times that of the Sun[8] and spins rapidly with a projected rotational velocityof150 km/s.[10]Mu1 Chamaeleontis' metallicity – elements heavier than helium – is 66% that of the Sun.[6]
