Mu1 Chamaeleontis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 10h 00m 43.7937s |
| Declination | −82° 12′ 52.812″ |
| Apparent magnitude (V) | 5.53 |
| Characteristics | |
| Spectral type | A0 IV |
| U−B color index | +0.05 |
| B−V color index | +0.03 |
| Astrometry | |
| Radial velocity (Rv) | 16±10 km/s |
| Proper motion (μ) | RA: −26.011 mas/yr Dec.: +31.141 mas/yr |
| Parallax (π) | 8.0957±0.0795 mas |
| Distance | 403 ± 4 ly (124 ± 1 pc) |
| Absolute magnitude (MV) | +0.23 |
| Details | |
| Mass | 2.6 M☉ |
| Radius | 3.66 R☉ |
| Luminosity | 90.7 L☉ |
| Surface gravity (log g) | 3.73 cgs |
| Temperature | 10,141+157 −240 K |
| Metallicity [Fe/H] | −0.18 dex |
| Rotational velocity (v sin i) | 150 km/s |
| Other designations | |
| μ1 Cha, CPD−81°399, FK5 3980, HD 87971, HIP 49065, HR 3983, SAO 258554 | |
| Database references | |
| SIMBAD | data |
μ1 Chamaeleontis, Latinized as Mu1 Chamaeleontis, is a single star in the southern circumpolar constellation Chamaeleon. It is dimly visible to the naked eye with an apparent visual magnitude of 5.53. Based upon parallax measurements, it is located approximately 403 light-years away from the Sun. The radial velocity is poorly constrained, but it appears to be drifting further away at the rate of about 16 km/s
This object has a stellar classification of A0 IV, matching an A-type subgiant star. It has 2.6 times the mass of the Sun and an effective temperature of 10,141 K, giving a bluish white glow. Due to its slightly enlarged radius, the star has a luminosity over 90 times that of the Sun and spins rapidly with a projected rotational velocity of 150 km/s. Mu1 Chamaeleontis' metallicity – elements heavier than helium – is 66% that of the Sun.