30 Piscium
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces |
| Right ascension | 00h 01m 57.61997s[1] |
| Declination | −06° 00′ 50.6554″[1] |
| Apparent magnitude (V) | 4.31 - 4.41[2] |
| Characteristics | |
| Spectral type | M3 III[3] |
| B−V color index | 1.631±0.011[4] |
| Variable type | LPV[5], LB?[2] |
| Astrometry | |
| Radial velocity (Rv) | −11.7±0.5[6] km/s |
| Proper motion (μ) | RA: −57.13[1] mas/yr Dec.: −72.08[1] mas/yr |
| Parallax (π) | 13.91 ± 0.28 mas[1] |
| Distance | 234 ± 5 ly (72 ± 1 pc) |
| Absolute magnitude (MV) | −1.20[5] |
| Details | |
| Surface gravity (log g) | 2[7] cgs |
| Temperature | 3647[7] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
30 Piscium (HIP 154) is a solitary[9] red giant star in the zodiac constellation of Pisces. It is visible to the naked eye with an apparent visual magnitude of 4.37.[7] The distance to this star, based upon an annual parallax shift of 13.91±0.28 mas,[1] is around 234 light years. It is moving closer with a heliocentric radial velocity of −12 km/s.[6]
This is a candidate long-period variable star[5] and has been given the designation YY Psc.[10] Its varies in brightness between magnitudes 4.31 and 4.41 with no clear period. Possible periods of 23.1, 32.0, 53.6, and 167.8 days have been identified.[11]
References
- ^ 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.
- ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ^ Keenan, P.; McNeil, R. (October 1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245–266, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
- ^ 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.
- ^ a b c Rimoldini, L.; et al. (December 2012), "Automated classification of Hipparcos unsolved variables", Monthly Notices of the Royal Astronomical Society, 427 (4): 2917–2937, arXiv:1301.1545, Bibcode:2012MNRAS.427.2917R, doi:10.1111/j.1365-2966.2012.21752.x.
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ 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, A61.
- ^ a b c Pérez Martínez, M. I.; et al. (November 2014), "The non-active stellar chromosphere: Ca II basal flux", Monthly Notices of the Royal Astronomical Society, 445 (1): 270–279, Bibcode:2014MNRAS.445..270P, doi:10.1093/mnras/stu1706.
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ "30 Psc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-10.
- ^ 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.
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ Kukarkin, B. V.; et al. (January 1975), "60th Name-List of Variable Stars", Information Bulletin on Variable Stars, 961: 1, Bibcode:1975IBVS..961....1K.
- ^ Tabur, V; Bedding, T. R; Kiss, L. L; Moon, T. T; Szeidl, B; Kjeldsen, H (2009). "Long-term photometry and periods for 261 nearby pulsating M giants". Monthly Notices of the Royal Astronomical Society. 400 (4): 1945. arXiv:0908.3228. Bibcode:2009MNRAS.400.1945T. doi:10.1111/j.1365-2966.2009.15588.x.
{{cite journal}}: CS1 maint: unflagged free DOI (link)
