N Carinae is a single[9] star in the constellation Carina, just to the northeast of the prominent star Canopus. This object has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.35.[2] Based on parallax, it is located at a distance of approximately 1,360 light years from the Sun.[1] It has an absolute magnitude of −3.75,[2] and is drifting further away with a radial velocity of +22.5 km/s.[2]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 06h 34m 58.57993s[1] |
| Declination | −52° 58′ 32.1919″[1] |
| Apparent magnitude (V) | 4.35[2] |
| Characteristics | |
| Spectral type | A0II[3] or B9III[4] |
| B−V color index | −0.021±0.016[2] |
| Astrometry | |
| Radial velocity (Rv) | +22.5±0.5[2] km/s |
| Proper motion (μ) | RA: -7.65[1] mas/yr Dec.: +10.54[1] mas/yr |
| Parallax (π) | 2.39 ± 0.13 mas[1] |
| Distance | 1,360 ± 70 ly (420 ± 20 pc) |
| Absolute magnitude (MV) | −3.75[2] |
| Details | |
| Mass | 7.9±0.2[5] M☉ |
| Luminosity | 3,411.35[2] L☉ |
| Temperature | 8,004[6] K |
| Rotational velocity (v sin i) | 47[7] km/s |
| Age | 37.4±4.2[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object has a stellar classification of A0II,[3] matching a massive bright giant. In the past it had received a class of B9III,[4] which is sometimes still used.[5] The star is 37 million years old with 7.9 times the mass of the Sun.[5] It is spinning with a projected rotational velocity of 47 km/s.[7] N Carinae is radiating 3,411[2] times the luminosity of the Sun from its photosphere at an effective temperature of 8,004 K.[6]
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 c d e f g h i 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.
- ^ a b Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity", Royal Observatory Bulletin, 51, Bibcode:1962RGOB...51...79E.
- ^ a b c d 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.
- ^ a b McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427: 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- ^ a b Royer, F.; et al. (January 2002), "Rotational velocities of A-type stars. I. Measurement of v sin i in the southern hemisphere", Astronomy and Astrophysics, 381: 105–121, arXiv:astro-ph/0110490, Bibcode:2002A&A...381..105R, doi:10.1051/0004-6361:20011422, S2CID 13133418.
- ^ "N Car". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-12.
- ^ 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.