  | |
| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Pisces |
| Right ascension | 01h 37m 05.91523s [1] |
| Declination | +12° 08′ 29.5186″ [1] |
| Apparent magnitude (V) | 5.60 [2] |
| Characteristics | |
| Spectral type | F0 V [3] |
| Astrometry | |
| Radial velocity (Rv) | −1.0 [2] km/s |
| Proper motion (μ) |
RA: −77.29
[1]
mas/
yr Dec.: +9.13 [1] mas/ yr |
| Parallax (π) | 28.50 ± 0.97 mas [1] |
| Distance | 114 ± 4
ly (35 ± 1 pc) |
| Absolute magnitude (MV) | +2.94 [2] |
| Details | |
| Mass | 1.51±0.02 [4] M☉ |
| Luminosity | 6.3 [4] L☉ |
| Surface gravity (log g) | 4.00 [2] cgs |
| Temperature | 6,850 [2] K |
| Metallicity [Fe/H] | −0.45±0.05 [5] dex |
| Rotational velocity (v sin i) | 105.9 [2] km/s |
| Age | 2.0 [6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Pi Piscium (π Piscium) is a solitary, [8] yellow-white hued star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.60. [2] Based upon an annual parallax shift of 28.50 mas as seen from Earth, [1] it is located about 1114 light years from the Sun. It is a member of the thin disk population of the Milky Way. [5]
This is an ordinary F-type main-sequence star with a stellar classification of F0 V. [3] At the estimated age of two billion years, [6] it is about 55% of the way through its main sequence lifetime [4] and still has a relatively high rate of spin with a projected rotational velocity of 105.9 km/s. [2] The star has 1.5 [4] times the mass of the Sun and is radiating 6.3 [4] times the Sun's luminosity at an effective temperature of 6,850 K. [2]
Naming
In Chinese, 右更 (Yòu Gèng), meaning Official in Charge of the Pasturing, refers to an asterism consisting of refers to an asterism consisting of π Piscium, η Piscium, ρ Piscium, ο Piscium and 104 Piscium. Consequently, the Chinese name for π Piscium itself is 右更三 (Yòu Gèng sān, English: the Third Star of Official in Charge of the Pasturing.) [9]
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, S2CID 18759600.
- ^ a b c d e f g h i Paunzen, E.; et al. (July 2014), "Investigating the possible connection between λ Bootis stars and intermediate Population II type stars", Astronomy & Astrophysics, 567: 8, arXiv: 1406.3936, Bibcode: 2014A&A...567A..67P, doi: 10.1051/0004-6361/201423817, S2CID 56332289, A67.
- ^ a b Cowley, Anne; Fraquelli, Dorothy (February 1974), "MK Spectral Types for Some Bright F Stars", Publications of the Astronomical Society of the Pacific, 86 (509): 70, Bibcode: 1974PASP...86...70C, doi: 10.1086/129562.
- ^ a b c d e 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 Ramírez, I.; et al. (September 2012), "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets", The Astrophysical Journal, 756 (1): 46, arXiv: 1207.0499, Bibcode: 2012ApJ...756...46R, doi: 10.1088/0004-637X/756/1/46, S2CID 119199829.
- ^ a b Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv: 0811.3982, Bibcode: 2009A&A...501..941H, doi: 10.1051/0004-6361/200811191, S2CID 118577511.
-
^
"pi. Psc".
SIMBAD.
Centre de données astronomiques de Strasbourg. Retrieved 2017-07-25.
{{ cite web}}: CS1 maint: postscript ( link) - ^ 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.
- ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日
