Mu1 Chamaeleontis

For other stars with this Bayer designation, see μ Chamaeleontis.
μ1 Chamaeleontis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 10h 00m 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]
Distance403 ± 4 ly
(124 ± 1 pc)
Absolute magnitude (MV)+0.23[2]
Details
Mass2.6[6] M☉
Radius3.66[7] R☉
Luminosity90.7[8] L☉
Surface gravity (log g)3.73[6] cgs
Temperature10,141+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
SIMBADdata

μ1 Chamaeleontis, Latinized as Mu1 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 temperature of 10,141 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 velocity of 150 km/s.[10] Mu1 Chamaeleontis' metallicity – elements heavier than helium – is 66% that of the Sun.[6]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 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. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Karchenko2007 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Huang1953 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).