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HD 73390

This article is about e1 Carinae. For e2 Carinae, see HD 73389. For E Carinae, see V345 Carinae.
Not to be confused with ε Carinae.
HD 73390
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 08h 35m 15.55393s[1]
Declination −58° 13′ 29.0544″[1]
Apparent magnitude (V) 5.25 + 8.90[2]
Characteristics
Spectral type B4V[3]
B−V color index −0.133±0.005[4]
Astrometry
Radial velocity (Rv)21.0±4.2[4] km/s
Proper motion (μ) RA: -21.280[1] mas/yr
Dec.: +11.230[1] mas/yr
Parallax (π)3.7340 ± 0.1418 mas[1]
Distance870 ± 30 ly
(270 ± 10 pc)
Absolute magnitude (MV)−1.91[4]
Details
A
Mass7.0±0.4[5] M☉
Radius3.9[6] R☉
Luminosity1159.86[4] L☉
Surface gravity (log g)4.5[7] cgs
Temperature16,571±306[8] K
Rotational velocity (v sin i)155[8] km/s
Age36.1±11.0[5] Myr
B
Mass0.9+0.04
−0.02[7] M☉
Temperature5,241±158[7] K
Metallicity [Fe/H]-0.5[7] dex
Rotational velocity (v sin i)10[7] km/s
Other designations
e01 Car, BD−57°1590, GC 11796, HD 73390, HIP 42129, HR 3415, SAO 236105, CCDM J08353-5813, WDS J08353-5813[9]
Database references
SIMBADdata

HD 73390, also called e1 Carinae, is a binary star[2] system in the constellation Carina. It is approximately 870 light years from Earth. The primary is a blue-white B-type main sequence dwarf with an apparent magnitude of +5.27. It displays an infrared excess and is a candidate host of an orbiting debris disk.[10] The secondary is a magnitude 8.9 star which has a mass and temperature similar to the Sun.

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference CADARS 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. ^ a b Cite error: The named reference Paunzen2005 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Mannings1998 was invoked but never defined (see the help page).
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