Iota Carinae
 Location of ι Carinae (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Carina |
| Right ascension | 09h 17m 05.40686s |
| Declination | −59° 16′ 30.8353″ |
| Apparent magnitude (V) | 2.21 |
| Characteristics | |
| Spectral type | A9 Ib |
| U−B color index | +0.16 |
| B−V color index | +0.18 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | 13.3 km/s |
| Proper motion (μ) |
RA: –19.03 mas/yr Dec.: +13.11 mas/yr |
| Parallax (π) | 4.71 ± 0.46mas |
| Distance | 690 ± 70 ly (210 ± 20 pc) |
| Absolute magnitude (MV) | –5.1 |
| Details | |
| Mass | 7.4 M☉ |
| Luminosity | 4,900 L☉ |
| Surface gravity (log g) | 2.40 cgs |
| Temperature | 7,500 K |
| Metallicity [Fe/H] | –0.14 dex |
| Rotational velocity (v sin i) | 10.0 km/s |
| Age | 37.4 ± 5.1 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Iota Carinae (ι Carinae, abbreviated Iota Car, ι Car), also named Aspidiske, is a star in the southern circumpolar constellation (circumpolar if viewed at any location from approximately 40° S to the South Pole) of Carina. With an apparent visual magnitude of 2.2, it is one of the brighter stars in the night sky. It can be seen from the latitude of Alexandria or Mobile, Alabama and southward.
The False Cross is an asterism formed from Iota Carinae, Delta Velorum, Kappa Velorum and Epsilon Carinae. It is so called because it is sometimes mistaken for the Southern Cross, causing errors in astronavigation.
ι Carinae (Latinised to Iota Carinae) is the star's Bayer designation.
It bore the traditional names Aspidiske (not be confused with Asmidiske, the proper name of Xi Puppis), Scutulum and Turais (or Tureis, a name shared with Rho Puppis). Turais is from the Arabic تُرَيْس turais "shield" (diminutive), while Aspidiske and Scutulum are the Greek and Latin translations, the diminutives of ασπίδα and scūtum "shield". In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included Aspidiske for this star.
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