Pi Piscium

Pi Piscium
	Location of πぱい Piscium (circled)
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Pisces
Right ascension	01h 37m 05.91523s
Declination	+12° 08′ 29.5186″
Apparent magnitude (V)	5.60
Characteristics
Spectral type	F0 V
Astrometry
Radial velocity (Rv)	−1.0 km/s
Proper motion (μみゅー)	RA: −77.29 mas/yr ; Dec.: +9.13 mas/yr
Parallax (πぱい)	28.50 ± 0.97 mas
Distance	114 ± 4 ly ; (35 ± 1 pc)
Absolute magnitude (MV)	+2.94
Details
Mass	1.51±0.02 M☉
Luminosity	6.3 L☉
Surface gravity (log g)	4.00 cgs
Temperature	6,850 K
Metallicity [Fe/H]	−0.45±0.05 dex
Rotational velocity (v sin i)	105.9 km/s
Age	2.0 Gyr
Other designations
	πぱい Psc, 102 Piscium, BD+11° 205, FK5 1046, GC 1954, HD 9919, HIP 7535, HR 463, SAO 92536, PPM 117498
Database references
SIMBAD	data

Pi Piscium (πぱい 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[edit]

In Chinese, 右みぎ更さら (Yòu Gèng), meaning Official in Charge of the Pasturing, refers to an asterism consisting of refers to an asterism consisting of πぱい Piscium, ηいーた Piscium, ρろー Piscium, οおみくろん Piscium and 104 Piscium. Consequently, the Chinese name for πぱい Piscium itself is 右みぎ更さら三さん (Yòu Gèng sān, English: the Third Star of Official in Charge of the Pasturing.)^[9]

References[edit]

^ ^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らむだ 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) 天文てんもん教育きょういく資し訊網 2006 年ねん 5 月がつ 19 日にち

[vanLeeuwen2007-1] ^ ^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.

[Paunzen2014-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Paunzen, E.; et al. (July 2014), "Investigating the possible connection between λらむだ 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.

[Fraquelli1974-3] 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.

[Zorec2012-4] 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.

[Ramirez2012-5] 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.

[Holmberg2009-6] 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.

[SIMBAD-7] "pi. Psc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-25.{{cite web}}: CS1 maint: postscript (link)

[Eggleton2008-8] 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.

[9] (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文てんもん教育きょういく資し訊網 2006 年ねん 5 月がつ 19 日にち

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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Location of πぱい Piscium (circled)
Constellation	Pisces
Right ascension	01^h 37^m 05.91523^s^[1]
Declination	+12° 08′ 29.5186″^[1]
Apparent magnitude (V)	5.60^[2]
Characteristics
Spectral type	F0 V^[3]
Astrometry

Radial velocity (R_v)	−1.0^[2] km/s
Proper motion (μみゅー)	RA: −77.29^[1] mas/yr Dec.: +9.13^[1] mas/yr
Parallax (πぱい)	28.50 ± 0.97 mas^[1]
Distance	114 ± 4 ly (35 ± 1 pc)
Absolute magnitude (M_V)	+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
πぱい Psc, 102 Piscium, BD+11° 205, FK5 1046, GC 1954, HD 9919, HIP 7535, HR 463, SAO 92536, PPM 117498^[7]
Database references
SIMBAD	data