Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Carina |
Right ascension | 09h 17m 05.40686s[1] |
Declination | −59° 16′ 30.8353″[1] |
Apparent magnitude (V) | 2.21[2] |
Characteristics | |
Spectral type | A7 Ib[3] |
U−B color index | +0.16[4] |
B−V color index | +0.18[4] |
Variable type | Suspected[5] |
Astrometry | |
Radial velocity (Rv) | 13.3[2] km/s |
Proper motion (μ) | RA: −19.03[1] mas/yr Dec.: +13.11[1] mas/yr |
Parallax (π) | 4.26 ± 0.1 mas[1] |
Distance | 770 ± 20 ly (235 ± 6 pc) |
Absolute magnitude (MV) | −5.1[6] |
Details | |
Mass | 6.9[7] M☉ |
Radius | 46.4–50.1[7] R☉ |
Luminosity | 4,900[8] L☉ |
Surface gravity (log g) | 1.85±0.1[7] cgs |
Temperature | 7,500[7]–7,700[9] K |
Metallicity [Fe/H] | −0.14[8] dex |
Rotational velocity (v sin i) | 10.0[8] km/s |
Age | 56[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Iota Carinae (ι Carinae, abbreviated Iota Car, ι Car), officially named Aspidiske /ˌæspɪˈdɪskiː/,[11] is a star in the southern constellation of Carina. With an apparent visual magnitude of 2.2,[2] it is one of the brighter stars in the night sky.
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