Nu Cassiopeiae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cassiopeia[1] |
| Right ascension | 00h 43m 28.07045s[2] |
| Declination | +47° 01′ 28.3694″[2] |
| Apparent magnitude (V) | +4.89[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2][4] |
| Spectral type | B9 III[5] or B8 V[6] |
| U−B color index | −0.43[7] |
| B−V color index | −0.11[7] |
| Astrometry | |
| Radial velocity (Rv) | +9.0±4.2[8] km/s |
| Proper motion (μ) | RA: +29.453 mas/yr[2] Dec.: −8.152 mas/yr[2] |
| Parallax (π) | 9.1537±0.2122 mas[2] |
| Distance | 356 ± 8 ly (109 ± 3 pc) |
| Absolute magnitude (MV) | −0.60[1] |
| Details | |
| Mass | 3.6[9] M☉ |
| Radius | 2.8[9] R☉ |
| Luminosity | 194[9] L☉ |
| Surface gravity (log g) | 4.026±0.035[10] cgs |
| Temperature | 13,268±150[10] K |
| Rotational velocity (v sin i) | 134±17[10] km/s |
| Age | 197[11] Myr |
| Other designations | |
| ν Cas, 25 Cas, BD+50°147, HD 4636, HIP 3801, HR 223, SAO 21729[12] | |
| Database references | |
| SIMBAD | data |
Nu Cassiopeiae is a solitary[13] star in the northern constellation of Cassiopeia. Its name is a Bayer designation that is Latinized from ν Cassiopeiae, and abbreviated Nu Cas or ν Cas. With an apparent visual magnitude of +4.89,[3] it is a faint star but visible to the naked eye. Based upon an annual parallax shift of 9.15 mas as seen from Earth,[2] this star is located around 356 light-years (109 pc) from the Sun. It is drifting further away with a line of sight velocity component of roughly +9 km/s.[8]
Cowley et al. (1969) catalogued this star with a stellar classification of B9 III,[5] 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.[6]
References
- ^ a b 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. XHIP record for this object at VizieR.
- ^ a b c d e f 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 Häggkvist, L.; Oja, T. (1966), "Photoelectric photometry of bright stars", Arkiv för Astronomi, 4: 137–163, Bibcode:1966ArA.....4..137H.
- ^ Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
- ^ a b 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.
- ^ a b Crawford, D. L. (February 1963), "U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars", Astrophysical Journal, 137: 530, Bibcode:1963ApJ...137..530C, doi:10.1086/147526.
- ^ a b 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, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b c Stassun, Keivan G.; et al. (2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050.
- ^ a b c Huang, Wenjin; et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal, 722 (1): 605–619, arXiv:1008.1761, Bibcode:2010ApJ...722..605H, doi:10.1088/0004-637X/722/1/605, S2CID 118532653.
- ^ Gontcharov, G. A. (2012), "Dependence of kinematics on the age of stars in the solar neighborhood", Astronomy Letters, 38 (12): 771, arXiv:1606.08814, Bibcode:2012AstL...38..771G, doi:10.1134/S1063773712120031.
- ^ "nu. Cas", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2017-08-30.
- ^ 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.