Iota Volantis
B-type giant star in the constellation Volans
From Wikipedia, the free encyclopedia
Iota Volantis, Latinized as ι Volantis, is a star in the southern constellation of Volans. It has an apparent visual magnitude of 5.39,[2] which indicates it is faintly visible to the naked eye. With a parallax of 0.00579″, it lies at an estimated distance of roughly 560 light years from the Sun.[1]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Volans |
| Right ascension | 06h 51m 26.98552s[1] |
| Declination | −70° 57′ 48.2766″[1] |
| Apparent magnitude (V) | 5.39[2] |
| Characteristics | |
| Spectral type | B7 III[3] |
| U−B color index | −0.37[3] |
| B−V color index | −0.12[3] |
| Astrometry | |
| Radial velocity (Rv) | 18.5[4] km/s |
| Proper motion (μ) | RA: +3.64[1] mas/yr Dec.: +26.08[1] mas/yr |
| Parallax (π) | 5.79±0.19 mas[1] |
| Distance | 560 ± 20 ly (173 ± 6 pc) |
| Absolute magnitude (MV) | +0.14[5] |
| Details | |
| Mass | 3.72±0.06[6] M☉ |
| Radius | 4.7[7] R☉ |
| Luminosity | 313[6] L☉ |
| Temperature | 11,803[6] K |
| Rotational velocity (v sin i) | 129[6] km/s |
| Age | 236[5] Myr |
| Other designations | |
| ι Vol, CPD−70°572, FK5 267, HD 51557, HIP 32912, HR 2602, SAO 256344[8] | |
| Database references | |
| SIMBAD | data |
This star has a stellar classification of B7 III,[3] which means it is a B-type giant star. However, some sources give it a classification of B7 IV, which would indicate it is a subgiant star. It has 3.7 times the mass of the Sun and is spinning rapidly with a projected rotational velocity of 129 km/s.[6] The estimated size of the star is 4.7 times the radius of the Sun,[7] and it shines with around 313 times the Sun's luminosity. The effective temperature of the star's outer atmosphere is 11,803 K,[6] giving it the blue-white hue of a B-type star.[9]
