Zeta Piscium
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Pisces |
| ζ Psc A | |
| Right ascension | 01h 13m 45.17477s[1] |
| Declination | +07° 34′ 31.2745″[1] |
| Apparent magnitude (V) | 5.28[2] |
| ζ Psc B | |
| Right ascension | 01h 13m 43.88735s[1] |
| Declination | +07° 34′ 42.1765″[1] |
| Apparent magnitude (V) | 6.43[2] |
| Characteristics | |
| Spectral type | A7IV + A7IV + F7V + G7V + ?[2] |
| Astrometry | |
| ζ Psc A | |
| Proper motion (μ) | RA: +145.00[1] mas/yr Dec.: −55.69[1] mas/yr |
| Parallax (π) | 18.76 ± 2.76 mas[1] |
| Distance | approx. 170 ly (approx. 53 pc) |
| Absolute magnitude (MV) | 1.97[3] |
| ζ Psc B | |
| Proper motion (μ) | RA: +181.78[1] mas/yr Dec.: −40.34[1] mas/yr |
| Details[4] | |
| ζ Psc A | |
| Mass | 2.07±0.13 M☉ |
| Luminosity | 27.4 L☉ |
| Temperature | 7,345 K |
| Rotational velocity (v sin i) | 196 km/s |
| ζ Psc B | |
| Metallicity [Fe/H] | 0.18[3] dex |
| Other designations | |
Revati, ζ Psc, 86 Piscium | |
| ζ Psc A: BD+06° 174, FK5 1033, HD 7344, HIP 5737, HR 361, SAO 109739, WDS J01137+0735A[5] | |
| ζ Psc B: BD+06° 175, HD 7345, HIP 5743, HR 362, SAO 109740, WDS J01137+0735BC[6] | |
| Database references | |
| SIMBAD | data |
Zeta Piscium (ζ Piscium) is a quintuple[2] star system in the zodiac constellation of Pisces. The primary, component A, forms a pair of A-type subgiant stars, Aa and Ab, with an angular separation of 0.15 arc seconds and visual magnitude 5.28.[2] The companion, component B, is a spectroscopic binary star system with a period of 9.075 days and an eccentricity of 0.04. Together, components Ba and Bb have a combined visual magnitude of 6.43 and lie at an angular separation of 22.9 arc seconds from the primary. They are F-type main-sequence and G-type main-sequence stars, respectively. The fifth component is a magnitude 12.2 star at an angular separation 1.0 arc seconds from component B.[2]
Because it is positioned near the ecliptic, it is subject to lunar eclipses.[7]
Naming
This star got the name Revati by approval of IAU on 30th of June, 2017.[8][9]
In Chinese, 外屏 (Wài Píng), meaning Outer Fence, refers to an asterism consisting of refers to an asterism consisting of ζ Piscium, δ Piscium, ε Piscium, μ Piscium, ν Piscium, ξ Piscium and α Piscium. Consequently, ζ Piscium itself is known as 外屏三 (Wài Píng sān, Template:Lang-en.)[10]
References
- ^ a b c d e f g h i 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 c d e f 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) - ^ 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.
- ^ 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.
- ^ "zet Psc A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-31.
{{cite web}}: CS1 maint: postscript (link) - ^ "zet Psc B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-31.
{{cite web}}: CS1 maint: postscript (link) - ^ Meyer, C.; et al. (1995), "Observations of lunar occultations at Observatoire de la Cote d'Azur", Astronomy and Astrophysics Supplement, 110: 107, Bibcode:1995A&AS..110..107M.
- ^ IAU: Naming Stars
- ^ Phys.org: IAU approves 86 new star names from around the world, of December 11th, 2017
- ^ Template:Zh icon AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日
