HR 4102

This article is about I Carinae. For i Carinae, see HD 79447. For l Carinae, see HD 84810. For ι Carinae, see Iota Carinae.
HR 4102
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 10h 24m 23.70597s[1]
Declination −74° 01′ 53.8036″[1]
Apparent magnitude (V) 3.99[2]
Characteristics
Spectral type F3 V[3]
U−B color index −0.01[2]
B−V color index +0.36[2]
Astrometry
Radial velocity (Rv)−4.7±0.6[4] km/s
Proper motion (μ) RA: −16.29[1] mas/yr
Dec.: −27.67[1] mas/yr
Parallax (π)61.64 ± 0.12 mas[1]
Distance52.9 ± 0.1 ly
(16.22 ± 0.03 pc)
Absolute magnitude (MV)2.94[5]
Details
Mass1.42[6] M☉
Radius1.592[7] R☉
Luminosity5.015[7] L☉
Surface gravity (log g)4.34[6] cgs
Temperature7,017±239[6] K
Metallicity [Fe/H]+0.02[3] dex
Rotational velocity (v sin i)51.6[8] km/s
Age977[6] Myr
Other designations
I Car, CD−73° 576, GJ 391, HD 90589, HIP 50954, HR 4102, SAO 256710[9]
Database references
SIMBADdata

I Carinae is a single,[10] yellow-white hued star in the southern constellation Carina. It is a fourth[2] magnitude star that is visible to the naked eye. An annual parallax shift of 61.64 mas provides a distance estimate of 62 light years. It is moving closer with a radial velocity of −5 km/s,[4] and in an estimated 2.7 million years will pass within 24.3 ly (7.46 pc) of the Sun.[11] In the next 7500 years, the south Celestial pole will pass close to this star and Omega Carinae (5800 CE).[12]

Gray et al. (2006) gave this star a stellar classification of F3 V,[3] indicating it is an F-type main-sequence star that is generating energy through hydrogen fusion at its core. It is younger than the Sun with an estimated age of 977[6] million years, and is spinning with a projected rotational velocity of 51.6 km/s.[8] The star has 1.4[6] times the mass of the Sun, 1.6[7] times its radius, and is radiating 5.56[5] times the Sun's luminosity from its photosphere at an effective temperature of around 7,017 K.[6] It is a variable star and most likely (99.2% chance) the source of detected X-ray emission coming from these coordinates.[13]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Cousins1962 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference schofield was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Schroeder2009 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 Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference BailerJones2015 was invoked but never defined (see the help page).
  12. ^ "Precession".
  13. ^ Cite error: The named reference Haakonsen2009 was invoked but never defined (see the help page).