Astronomy:HD 61248
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| 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 |
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]
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
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H.
- ↑ "HD 61248". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+61248.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ 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.
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