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] |
Distance | 52.9 ± 0.1
ly (16.22 ± 0.03 pc) |
Absolute magnitude (MV) | 2.94 [5] |
Details | |
Mass | 1.42 [6] M☉ |
Luminosity | 5.56 [5] L☉ |
Surface gravity (log g) | 4.34 [6] cgs |
Temperature | 7,017±239 [6] K |
Metallicity [Fe/H] | +0.02 [3] dex |
Rotational velocity (v sin i) | 51.6 [7] km/s |
Age | 977 [6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
I Carinae is a single, [9] 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. [10] In the next 7500 years, the south Celestial pole will pass close to this star and Omega Carinae (5800 CE). [11]
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. [7] The star has 1.4 [6] times the mass of the Sun 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. [12]