HD 76728

This article is about c Carinae. For C Carinae, see HD 69863.
HD 76728
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 08h 55m 02.82822s[1]
Declination −60° 38′ 40.5998″[1]
Apparent magnitude (V) +3.84[2]
Characteristics
Evolutionary stage Bright giant
Spectral type B8/9II[3]
B−V color index −0.104±0.006[2]
Variable type Constant[4]
Astrometry
Radial velocity (Rv)+25.0±4.1[2] km/s
Proper motion (μ) RA: −28.18[1] mas/yr
Dec.: +41.48[1] mas/yr
Parallax (π)10.20 ± 0.10 mas[1]
Distance320 ± 3 ly
(98.0 ± 1.0 pc)
Absolute magnitude (MV)−1.12[2]
Details
Radius5.0[5] R☉
Luminosity449.05[2] L☉
Temperature11,880[5] K
Other designations
c Car, CD−60°1243, FK5 336, GC 12359, HD 76728, HIP 43783, HR 3571, SAO 250374, CCDM J08550-6039, WDS J08550-6039A[6]
Database references
SIMBADdata

HD 76728 is a suspected astrometric binary[7] star system in the constellation Carina. It has the Bayer designation c Carinae; HD 76728 is the identifier from the Henry Draper catalogue. The visible component has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +3.84.[2] The system is located at a distance of approximately 320 light years from the Sun based on parallax,[1] and it is drifting further away with a radial velocity of around +25 km/s.[2] It is a candidate member of the Volans-Carina Association of co-moving stars.[8]

The visible component is an aging bright giant star with a stellar classification of B8/9II.[3] The spectrum of the star displays metallic lines of magnesium.[9] The Volans-Carina Association to which it belongs has an age of 90 million years.[8] The star has five[5] times the radius of the Sun and is radiating 449[2] times the Sun's luminosity from its photosphere at an effective temperature of 11,880 K.[5]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Adelman2000 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Underhill1979 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. ^ a b Cite error: The named reference Gagné2018 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Garrison1994 was invoked but never defined (see the help page).