HD 79447

This article is about i Carinae. For I Carinae, see HD 90589. For ι Carinae, see Iota Carinae. For l Carinae, see HD 84810.
HD 79447
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 09h 11m 16.72089s[1]
Declination −62° 19′ 01.1295″[1]
Apparent magnitude (V) +3.96[2]
Characteristics
Spectral type B3V[3]
B−V color index −0.180±0.006[2]
Astrometry
Radial velocity (Rv)+17.5±2.7[2] km/s
Proper motion (μ) RA: −37.48[1] mas/yr
Dec.: +14.59[1] mas/yr
Parallax (π)6.01 ± 0.12 mas[1]
Distance540 ± 10 ly
(166 ± 3 pc)
Absolute magnitude (MV)−2.14[2]
Details
Mass7.0±0.1[4] M☉
Radius5.6[5] R☉
Luminosity2,054.17[2] L☉
Surface gravity (log g)3.5±0.1[3] cgs
Temperature18,900±500[3] K
Rotational velocity (v sin i)0[6] km/s
Age39.2±7.0[4] Myr
Other designations
i Car, CPD−61°1201, GC 12707, HD 79447, HIP 45101, HR 3663, SAO 250471[7]
Database references
SIMBADdata

HD 79447 is a single[8] star in the southern constellation of Carina. It has the Bayer designation i Carinae, while HD 79447 is the identifier from the Henry Draper catalogue. This star has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +3.96.[2] It is located at a distance of approximately 540 light years from the Sun based on parallax,[1] and has an absolute magnitude of −2.14.[2] The star drifting further away with a radial velocity of +18 km/s.[2] It is a candidate member of the Lower Centaurus–Crux group of the Sco OB2 association.[9]

This object is a B-type main-sequence star with a stellar classification of B3V.[3] A surface magnetic field has been detected with a strength on the order of 1 kG.[9] It has an estimated age of around 39[4] million years with no measured spin rate.[6] The star has about 5.6[5] times the radius of the Sun and 7[4] times the Sun's mass. It is radiating over two thousand[2] times the luminosity of the Sun from its photosphere at an effective temperature of 18,900 K.[3]

  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 i Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference levenhagen2006 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Fracassini2001 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference uesugi_fukuda70 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Chini2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Neiner2015 was invoked but never defined (see the help page).