Astronomy:Nu Cassiopeiae
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Short description: B-type star in the constellation Cassiopeia
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 00h 43m 28.07045s[1] |
| Declination | +47° 01′ 28.3694″[1] |
| Apparent magnitude (V) | +4.89[2] |
| Characteristics | |
| Spectral type | B9 III[3] or B8 V[4] |
| U−B color index | −0.43[5] |
| B−V color index | −0.11[5] |
| Astrometry | |
| Radial velocity (Rv) | +9.0±4.2[6] km/s |
| Proper motion (μ) | RA: +30.84±0.22[1] mas/yr Dec.: −10.02±0.18[1] mas/yr |
| Parallax (π) | 7.92 ± 0.32[1] mas |
| Distance | 410 ± 20 ly (126 ± 5 pc) |
| Absolute magnitude (MV) | −0.60[7] |
| Details | |
| Mass | 3.90±0.07[8] M☉ |
| Luminosity | 348[8] L☉ |
| Surface gravity (log g) | 4.026±0.035[9] cgs |
| Temperature | 13,268±150[9] K |
| Rotational velocity (v sin i) | 134±17[9] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu Cassiopeiae,[11] Latinized from ν Cassiopeiae, is a solitary[12] star in the northern constellation of Cassiopeia. With an apparent visual magnitude of +4.89,[2] it is a faint star but visible to the naked eye. Based upon an annual parallax shift of 7.92 mas as seen from Earth,[1] this star is located around 410 light years from the Sun. Cowley et al. (1969) catalogued this star with a stellar classification of B9 III,[3] indicating it has the spectrum of an evolved B-type giant star. However, Palmer et al. (1968) assigned it a class of B8 V, which would instead suggest it is an ordinary B-type main-sequence star.[4]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 Häggkvist, L.; Oja, T. (1966), "Photoelectric photometry of bright stars", Arkiv för Astronomi 4: 137–163, Bibcode: 1966ArA.....4..137H.
- ↑ 3.0 3.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C
- ↑ 4.0 4.1 Palmer, D. R. et al. (1968), "The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars", Royal Observatory Bulletin 135: 385, Bibcode: 1968RGOB..135..385P.
- ↑ 5.0 5.1 Crawford, D. L. (February 1963), "U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars", Astrophysical Journal 137: 530, doi:10.1086/147526, Bibcode: 1963ApJ...137..530C.
- ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 8.0 8.1 Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 9.0 9.1 9.2 Huang, Wenjin et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal 722 (1): 605–619, doi:10.1088/0004-637X/722/1/605, Bibcode: 2010ApJ...722..605H.
- ↑ "nu. Cas". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=nu.+Cas.
- ↑ Not to be confused with NU Cassiopeiae, an eclipsing binary of the Beta Lyrae type.
- ↑ 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.
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