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 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.^[1] It is located at a distance of approximately 540 light years from the Sun based on parallax,^[2] and has an absolute magnitude of −2.14.^[1] The star drifted further away with a radial velocity of +18 km/s.^[1] It is a candidate member of the Lower Centaurus–Crux group of the Sco OB2 association.^[9]

HD 79447

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Carina[1]
Right ascension	09h 11m 16.72089s[2]
Declination	−62° 19′ 01.1295″[2]
Apparent magnitude (V)	+3.96[1]
Characteristics
Spectral type	B3V[3]
B−V color index	−0.180±0.006[1]
Astrometry
Radial velocity (Rv)	+17.5±2.7[1] km/s
Proper motion (μ)	RA: −37.48[2] mas/yr Dec.: +14.59[2] mas/yr
Parallax (π)	6.01±0.12 mas[2]
Distance	540 ± 10 ly (166 ± 3 pc)
Absolute magnitude (MV)	−2.14[1]
Details
Mass	7.0±0.1[4] M☉
Radius	5.6[5] R☉
Luminosity	2,054.17[1] L☉
Surface gravity (log g)	3.5±0.1[3] cgs
Temperature	18,900±500[3] K
Rotational velocity (v sin i)	0[6] km/s
Age	39.2±7.0[4] Myr
Other designations
i Car, CPD−61°1201, GC 12707, HD 79447, HIP 45101, HR 3663, SAO 250471[7]
Database references
SIMBAD	data

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^[1] times the luminosity of the Sun from its photosphere at an effective temperature of 18,900 K.^[3]