HR 3803
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 09h 31m 13.31815s[1] |
| Declination | –57° 02′ 03.7552″[1] |
| Apparent magnitude (V) | 3.16[2] |
| Characteristics | |
| Spectral type | K5 III[3] |
| U−B color index | +1.88[4] |
| B−V color index | +1.55[4] |
| Astrometry | |
| Radial velocity (Rv) | –13.9[2] km/s |
| Proper motion (μ) | RA: –32.615 mas/yr[1] Dec.: +5.857 mas/yr[1] |
| Parallax (π) | 14.6234 ± 0.1858 mas[1] |
| Distance | 223 ± 3 ly (68.4 ± 0.9 pc)[1] |
| Details | |
| Mass | 2.1±0.3[5] M☉ |
| Radius | 66±5[5] R☉ |
| Luminosity | 776[5] L☉ |
| Surface gravity (log g) | 1.19±0.02[5] cgs |
| Temperature | 3,964±125[5] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HR 3803 or N Velorum (N Vel) is a 3rd-magnitude star on the border between the southern constellations Carina and Vela. Based upon parallax measurements, it is approximately 223 light-years (68 parsecs) from Earth.
It has a spectral classificafion of K5III,[3] indicating that it has evolved from the main sequence and is now a giant star. At this evolutionary stage, N Velorum has expanded to 66 times the size of the Sun and is emitting 776 times its luminosity.[5] Its effective temperature is of 3,964 K,[5] 30% cooler than the Sun, which gives it the typical orange hue of K-type stars.[6]
In 1752, French astronomer Nicolas Louis de Lacaille divided the former constellation Argo Navis into three separate constellations, and then referenced its stars by extending Bayer's system of star nomenclature;[7] this star was given the designation N Velorum. In 1871 Benjamin Apthorp Gould discovered this star to be variable, but this occurred prior to the standardization of variable star nomenclature by German astronomer Friedrich Wilhelm Argelander during the nineteenth century, so it does not fall into the standard range of variable star designations.[8]
References
[edit]- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Wielen, R.; et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions", Veröff. Astron. Rechen-Inst. Heidelb, 35 (35), Astronomisches Rechen-Institut Heidelberg: 1, Bibcode:1999VeARI..35....1W
- ^ a b Morgan, W. W.; Keenan, P. C. (1973). "Spectral Classification". Annual Review of Astronomy and Astrophysics. 11 (1): 29. Bibcode:1973ARA&A..11...29M. doi:10.1146/annurev.aa.11.090173.000333.
- ^ a b Johnson, H. L.; et al. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.
- ^ a b c d e f g Kallinger, T.; Beck, P. G.; Hekker, S.; Huber, D.; Kuschnig, R.; Rockenbauer, M.; Winter, P. M.; Weiss, W. W.; Handler, G.; Moffat, A. F. J.; Pigulski, A.; Popowicz, A.; Wade, G. A.; Zwintz, K. (2019-04-01), "Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation", Astronomy & Astrophysics, 624: A35, arXiv:1902.07531, doi:10.1051/0004-6361/201834514, ISSN 0004-6361.
- ^ "The Colour of Stars". Australia National Telescope Facility. 6 March 2024. Retrieved 2024-05-27.
- ^ "Greek Letter Designations Southern Stars". Archived from the original on 2010-01-21. Retrieved 2012-04-13.
- ^ Hoffleit, Dorrit (December 1987), "History of Variable Star Nomenclature" (PDF), The Journal of the American Association of Variable Star Observers, 16 (2): 65–70, Bibcode:1987JAVSO..16...65H, retrieved 2012-02-02
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