Iota Volantis
| 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 Nor, CPD−70°572, FK5 267, HD 51557, HIP 32912, HR 2602, SAO 256344[8] | |
| Database references | |
| SIMBAD | data |
Iota Volantis, Latinized as ι Volantis, is the Bayer designation for 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]
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]
References
[edit ]- ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b Cousins, A. W. J.; Stoy, R. H. (1962), "Photoelectric magnitudes and colours of Southern stars", Royal Observatory Bulletin, 64: 103, Bibcode:1962RGOB...64..103C.
- ^ a b c d Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick (eds.), "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E.
- ^ a b Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028 , Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
- ^ a b c d e f Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052 , Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289 , Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ "iot Vol -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg , retrieved 2016年09月05日.
- ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 18, 2012, retrieved 2012年01月16日.
