HD 61248 is a single[5] star in the southern constellation of Carina. It has the Bayer designation Q Carinae,[6] while HD 61248 is the star's identifier in the Henry Draper Catalogue. This star has an orange hue and is visible to the naked eye with an apparent visual magnitude of 4.93.[2] Based upon parallax measurements, it is located approximately 402 light years in distance from the Sun. The object is drifting further away with a radial velocity of +63 km/s,[1] having come to within 89.6 light-years some 1.8 million years ago.[2]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 07h 35m 39.72266s[1] |
| Declination | −52° 32′ 01.8087″[1] |
| Apparent magnitude (V) | 4.93[2] |
| Characteristics | |
| Spectral type | K3 III[3] |
| B−V color index | 1.373±0.064[2] |
| Astrometry | |
| Radial velocity (Rv) | +63.32±0.13[1] km/s |
| Proper motion (μ) | RA: +22.137[1] mas/yr Dec.: -11.639[1] mas/yr |
| Parallax (π) | 8.1036 ± 0.1335 mas[1] |
| Distance | 402 ± 7 ly (123 ± 2 pc) |
| Absolute magnitude (MV) | −0.47[2] |
| Details | |
| Radius | 30.27+1.86 −1.95[1] R☉ |
| Luminosity | 279.3±5.5[1] L☉ |
| Temperature | 4,289+145 −126[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an aging giant star with a stellar classification of K3 III,[3] which means it is no longer undergoing core hydrogen fusion. It has expanded to 30 times the Sun's radius and is radiating 279 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,289 K.[1]
References
edit- ^ a b c d e f g h i j k Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d e Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ "HD 61248". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-01-06.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Kostjuk, N.D. (2002), "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index", Institute of Astronomy of the Russian Academy of Sciences, Bibcode:2004yCat.4027....0K.