| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vela |
| Right ascension | 08 41 13.12966 |
| Declination | −47° 19′ 01.6610″ |
| Apparent magnitude (V) | 4.74 |
| Characteristics | |
| Spectral type | A5 II |
| B−V color index | 0.137±0.029 |
| Astrometry | |
| Radial velocity (Rv) | +17.4±2.8 km/s |
| Proper motion (μ) | RA: −8.228 mas/yr Dec.: +10.051 mas/yr |
| Parallax (π) | 1.7639 ± 0.1441 mas |
| Distance | 1,800 ± 200 ly (570 ± 50 pc) |
| Absolute magnitude (MV) | −4.67 |
| Details | |
| Mass | 8.8±0.1 M☉ |
| Radius | 33.11+1.76 −0.82 R☉ |
| Luminosity | 3,287±312 L☉ |
| Temperature | 7,595+96 −194 K |
| Rotational velocity (v sin i) | km/s |
| Age | 29.8±3.4 Myr |
| Other designations | |
| n Vel, CD−46°4448, FK5 2570, HD 74272, HIP 42624, HR 3452, SAO 220284 | |
| Database references | |
| SIMBAD | data |
HD 74272 is a star in the constellation Vela. It has the Bayer designation n Velorum, while HD 74272 is the identifier from the Henry Draper catalogue. This is a white hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.74. It is located at a distance of approximately 1,800 light years from the Sun based on parallax. The star is drifting further away with a radial velocity of +17 km/s.
This is an aging, massive bright giant star with a stellar classification of A5 II. It is an estimated 30 million years old with 8.8 times the mass of the Sun. Having exhausted the supply of hydrogen at its core, it has expanded to around 33 times the radius of the Sun. The star is radiating 3,287 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 7,595 K.
References
- ^ 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.
- ^ 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.
- ^ 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.
- ^ Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873
- Uesugi, Akira; Fukuda, Ichiro (1970), "Catalogue of rotational velocities of the stars", Contributions from the Institute of Astrophysics and Kwasan Observatory, University of Kyoto, Bibcode:1970crvs.book.....U.
- "n Vel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-19.
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