HD 77370

This article is about b2 Carinae. For b1 Carinae, see V376 Carinae. For B Carinae, see HR 3220.
Not to be confused with β Carinae.
HD 77370
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 08h 59m 24.18162s[1]
Declination −59° 05′ 01.3569″[1]
Apparent magnitude (V) 5.17[2]
Characteristics
Spectral type F4V[3]
B−V color index 0.417±0.005[2]
Astrometry
Radial velocity (Rv)+13.27±0.63[2] km/s
Proper motion (μ) RA: −175.366[1] mas/yr
Dec.: +281.700[1] mas/yr
Parallax (π)38.1808 ± 0.1737 mas[1]
Distance85.4 ± 0.4 ly
(26.2 ± 0.1 pc)
Absolute magnitude (MV)3.06[2]
Details
Mass1.45[4] M☉
Radius1.67+0.05
−0.11[1] R☉
Luminosity4.834+0.28
−0.27[1] L☉
Surface gravity (log g)4.18[4] cgs
Temperature6,699±97[4] K
Metallicity [Fe/H]0.93[4] dex
Rotational velocity (v sin i)60.4±3.0[5] km/s
Age1.3±0.3[2] Gyr
Other designations
b2 Car, BD−58°1327, FK5 2570, GC 12449, GJ 333.1, HD 77370, HIP 44143, HR 3598, SAO 236475, CCDM J08594-5905, WDS J08594-5905A[6]
Database references
SIMBADdata

HD 77370 is a single[7] star in the constellation Carina. It has the Bayer designation b2 Carinae; HD 77370 is the identifier from the Henry Draper catalogue. This object has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of 5.17.[2] It is located at a distance of 85 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +13 km/s.[2]

This is an ordinary F-type main-sequence star with a stellar classification of F4V.[3] It is around 1.3[2] billion years old and retains a relatively high projected rotational velocity of 60 km/s.[5] The star has 1.45[4] times the mass of the Sun and 1.67[1] times the Sun's radius. It is radiating 4.8[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,699 K.[4] The star is the most likely source of the X-ray emission detected at these coordinates.[8]

  1. ^ a b c d e f g h i j Cite error: The named reference GaiaDR2 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 Gray2006 was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference Luck2018 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Reiners2006 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 Haakonsen2009 was invoked but never defined (see the help page).