HD 69863

This article is about C Carinae. For c Carinae, see HD 76728.
HD 69863
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
A
Right ascension 08h 15m 16.42864s[1]
Declination −62° 54′ 56.5007″[1]
Apparent magnitude (V) 5.27[2]
B
Right ascension 08h 15m 16.47622s[3]
Declination −62° 54′ 54.8700″[3]
Apparent magnitude (V) 7.62[2]
Characteristics
Spectral type A2V[4] + F2V[5]
B−V color index 0.086±0.003[6]
Astrometry
Radial velocity (Rv)4.0±3.7[6] km/s
Absolute magnitude (MV)0.71[6]
A
Proper motion (μ) RA: −26.674[1] mas/yr
Dec.: -12.060[1] mas/yr
Parallax (π)12.5410 ± 0.1714 mas[1]
Distance260 ± 4 ly
(80 ± 1 pc)
B
Proper motion (μ) RA: −20.911[3] mas/yr
Dec.: -14.466[3] mas/yr
Parallax (π)12.7714 ± 0.0329 mas[3]
Distance255.4 ± 0.7 ly
(78.3 ± 0.2 pc)
Details
A
Mass2.10+0.20
−0.17[7] M☉
Luminosity42[8] L☉
Surface gravity (log g)3.90±0.14[7] cgs
Temperature8774+601
−210[1] K
Rotational velocity (v sin i)191[9] km/s
B
Radius1.43+0.12
−0.08[3] R☉
Luminosity3.966±0.016[3] L☉
Temperature6806+203
−258[3] K
Age635±88[7] Myr
Other designations
RMK8, C Carinae, CPD−62°985, HD 69863, HIP 40429, HR 3260, CCDM J08153-6255[10]
A: GC 11275, SAO 250164
B: GC 11276, SAO 250165
Database references
SIMBADdata

HD 69863 is a binary star[11] system in the southern constellation of Carina. It is visible to the naked eye as a dim point of light with a combined apparent visual magnitude of 5.16.[6] The system is located at a distance of about255 light years from the Sun based on parallax.[1][3] The dual nature of this system was announced in 1832 by German astronomer Carl Rümker.[12] As of 2015, the pair had an angular separation of 4.10″ along a position angle of 70°.[2]

The brighter primary, designated component A, has a visual magnitude of 5.27[2] and is an A-type main-sequence star with a stellar classification of A2V.[4] It is 635[7] million years old and is spinning with a projected rotational velocity of 191 km/s.[9] The star has 2.1 times the mass of the Sun.[7]

The magnitude 7.62[2] companion, component B, is a F-type main-sequence star with a class of F2V.[5] It is radiating four[3] times the luminosity of the Sun from its photosphere at an effective temperature of 6,806 K.[3] The system is a source for X-ray emission, which is most likely coming from the secondary.[13]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR2a was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2b was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference corbally1984 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference gullikson2016 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference mcdonald2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Letchford2017 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Schroeder2007 was invoked but never defined (see the help page).