HD 100825

This article is about C2 Centauri. For c2 Centauri, see HD 129685. For other stars with this Bayer designation, see C Centauri.
C2 Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 11h 35m 55.58452s[1]
Declination −47° 38′ 29.9009″[1]
Apparent magnitude (V) +5.26[2]
Characteristics
Spectral type F0V[3] or A7m[4]
B−V color index +0.257±0.003[2]
Astrometry
Radial velocity (Rv)+5.2±2.8[2] km/s
Proper motion (μ) RA: +33.897[1] mas/yr
Dec.: −49.629[1] mas/yr
Parallax (π)17.3990 ± 0.1049 mas[1]
Distance187 ± 1 ly
(57.5 ± 0.3 pc)
Absolute magnitude (MV)+1.31[2]
Details
Mass1.62[5] M☉
Radius2.67[1] R☉
Luminosity20.846[1] L☉
Surface gravity (log g)3.97±0.14[5] cgs
Temperature7,737±263[5] K
Age467[5] Myr
Other designations
C2 Cen, CD−46°7205, FK5 435, GC 15901, HD 100825, HIP 56573, HR 4466, SAO 222895[6]
Database references
SIMBADdata

HD 100825 is a single[7] star in the southern constellation of Centaurus. It has the Bayer designation C2 Centauri, while HD 100825 is the identifier from the Henry Draper catalogue. The star has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.26.[2] It is located at a distance of 187 light years from the Sun based on parallax, with an absolute magnitude of +1.31.[2] The radial velocity is poorly constrained, but the star appears to be drifting further away from the Sun at the rate of around 5 km/s.[2] It is a member of the Sirius supercluster of co-moving stars.[8]

This is an Am star[4] or metallic-line star with a stellar classification of F0V,[3] indicating it is a F-type main-sequence star that is generating energy by core hydrogen fusion. It is an estimated 467[5] million years old and has 1.62[5] times the mass of the Sun. The star is radiating 21 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 7,737 K.[5]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Malaroda1975 was invoked but never defined (see the help page).
  5. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).