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Chi Piscium

Chi Piscium (χ Piscium) is a solitary,[9] orange-hued star in the zodiac constellation of Pisces. It can be seen with the naked eye, having an apparent visual magnitude of +4.64.[2] Based upon an annual parallax shift of 8.50 mas as seen from Earth,[1] it is located about 384 light years from the Sun.

Chi Piscium
Location of χ Piscium (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pisces
Right ascension 01h 11m 27.21877s[1]
Declination +21° 02′ 04.7406″[1]
Apparent magnitude (V) +4.64[2]
Characteristics
Spectral type G8.5 III[3]
U−B color index +0.83[2]
B−V color index +1.02[2]
Astrometry
Radial velocity (Rv)+15.04±0.21[4] km/s
Proper motion (μ) RA: +39.32[1] mas/yr
Dec.: −10.48[1] mas/yr
Parallax (π)8.50 ± 0.21 mas[1]
Distance384 ± 9 ly
(118 ± 3 pc)
Absolute magnitude (MV)−1.13[5]
Details[6]
Mass3.17±0.23 M
Radius20.65±0.57 R
Luminosity209.2±10.5 L
Surface gravity (log g)2.33±0.05 cgs
Temperature4,835±28 K
Metallicity [Fe/H]−0.15±0.10 dex
Rotational velocity (v sin i)10[7] km/s
Age380±100 Myr
Other designations
χ Psc, 84 Piscium, BD+20° 172, FK5 1032, HD 7087, HIP 5571, HR 351, SAO 74544[8]
Database references
SIMBADdata

This is an evolved G-type giant star with a stellar classification of G8.5 III.[3] There is a 94%[6] chance that it is on the horizontal branch and is a red clump star,[10] which means it is generating energy through helium fusion at its core. Chi Piscium is estimated to have 3.17 times the mass of the Sun, nearly 21 times the solar radius, and shines with 209 times the Sun's luminosity. It is around 380 million years old.[6]

Naming

In Chinese, 奎宿 (Kuí Sù), meaning Legs (asterism), refers to an asterism consisting of χ Piscium, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, ν Andromedae, μ Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, υ Piscium, φ Piscium and ψ¹ Piscium. Consequently, the Chinese name for χ Piscium itself is 奎宿十五 (Kuí Sù shíwǔ, English: the Fifteenth Star of Legs.)[11]

References

  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.
  2. ^ a b c d Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society, 133 (4): 475–493, Bibcode:1966MNRAS.133..475A, doi:10.1093/mnras/133.4.475.
  3. ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
  4. ^ 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.
  5. ^ Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke (August 2008), "Stellar Parameters and Elemental Abundances of Late-G Giants", Publications of the Astronomical Society of Japan, 60 (4): 781–802, arXiv:0805.2434, Bibcode:2008PASJ...60..781T, doi:10.1093/pasj/60.4.781, S2CID 16258166.
  6. ^ a b c Reffert, Sabine; et al. (2015), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy & Astrophysics, 574: A116, arXiv:1412.4634, Bibcode:2015A&A...574A.116R, doi:10.1051/0004-6361/201322360, S2CID 59334290. Values are for the slightly higher probability horizontal branch model fit.
  7. ^ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1): 1, Bibcode:1970CoAsi.239....1B.
  8. ^ "chi Psc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-23.{{cite web}}: CS1 maint: postscript (link)
  9. ^ 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.
  10. ^ Valentini, M.; Munari, U. (November 2010), "A spectroscopic survey of faint, high-Galactic-latitude red clump stars. I. The high resolution sample", Astronomy and Astrophysics, 522: A79, arXiv:1007.0207, Bibcode:2010A&A...522A..79V, doi:10.1051/0004-6361/201014870, S2CID 119156545.
  11. ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日

Chi Piscium
piscium, piscium, solitary, orange, hued, star, zodiac, constellation, pisces, seen, with, naked, having, apparent, visual, magnitude, based, upon, annual, parallax, shift, seen, from, earth, located, about, light, years, from, location, piscium, circled, obse. Chi Piscium x Piscium is a solitary 9 orange hued star in the zodiac constellation of Pisces It can be seen with the naked eye having an apparent visual magnitude of 4 64 2 Based upon an annual parallax shift of 8 50 mas as seen from Earth 1 it is located about 384 light years from the Sun Chi PisciumLocation of x Piscium circled Observation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation PiscesRight ascension 01h 11m 27 21877s 1 Declination 21 02 04 7406 1 Apparent magnitude V 4 64 2 CharacteristicsSpectral type G8 5 III 3 U B color index 0 83 2 B V color index 1 02 2 AstrometryRadial velocity Rv 15 04 0 21 4 km sProper motion m RA 39 32 1 mas yr Dec 10 48 1 mas yrParallax p 8 50 0 21 mas 1 Distance384 9 ly 118 3 pc Absolute magnitude MV 1 13 5 Details 6 Mass3 17 0 23 M Radius20 65 0 57 R Luminosity209 2 10 5 L Surface gravity log g 2 33 0 05 cgsTemperature4 835 28 KMetallicity Fe H 0 15 0 10 dexRotational velocity v sin i 10 7 km sAge380 100 MyrOther designationsx Psc 84 Piscium BD 20 172 FK5 1032 HD 7087 HIP 5571 HR 351 SAO 74544 8 Database referencesSIMBADdataThis is an evolved G type giant star with a stellar classification of G8 5 III 3 There is a 94 6 chance that it is on the horizontal branch and is a red clump star 10 which means it is generating energy through helium fusion at its core Chi Piscium is estimated to have 3 17 times the mass of the Sun nearly 21 times the solar radius and shines with 209 times the Sun s luminosity It is around 380 million years old 6 Naming EditIn Chinese 奎宿 Kui Su meaning Legs asterism refers to an asterism consisting of x Piscium h Andromedae 65 Piscium z Andromedae e Andromedae d Andromedae p Andromedae n Andromedae m Andromedae b Andromedae s Piscium t Piscium 91 Piscium y Piscium f Piscium and ps Piscium Consequently the Chinese name for x Piscium itself is 奎宿十五 Kui Su shiwǔ English the Fifteenth Star of Legs 11 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 amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 a b c d Argue A N 1966 UBV photometry of 550 F G and K type stars Monthly Notices of the Royal Astronomical Society 133 4 475 493 Bibcode 1966MNRAS 133 475A doi 10 1093 mnras 133 4 475 a b Keenan Philip C McNeil Raymond C 1989 The Perkins catalog of revised MK types for the cooler stars Astrophysical Journal Supplement Series 71 245 Bibcode 1989ApJS 71 245K doi 10 1086 191373 de Bruijne J H J Eilers A C October 2012 Radial velocities for the HIPPARCOS Gaia Hundred Thousand Proper Motion project Astronomy amp Astrophysics 546 14 arXiv 1208 3048 Bibcode 2012A amp A 546A 61D doi 10 1051 0004 6361 201219219 S2CID 59451347 A61 Takeda Yoichi Sato Bun ei Murata Daisuke August 2008 Stellar Parameters and Elemental Abundances of Late G Giants Publications of the Astronomical Society of Japan 60 4 781 802 arXiv 0805 2434 Bibcode 2008PASJ 60 781T doi 10 1093 pasj 60 4 781 S2CID 16258166 a b c Reffert Sabine et al 2015 Precise radial velocities of giant stars VII Occurrence rate of giant extrasolar planets as a function of mass and metallicity Astronomy amp Astrophysics 574 A116 arXiv 1412 4634 Bibcode 2015A amp A 574A 116R doi 10 1051 0004 6361 201322360 S2CID 59334290 Values are for the slightly higher probability horizontal branch model fit Bernacca P L Perinotto M 1970 A catalogue of stellar rotational velocities Contributi Osservatorio Astronomico di Padova in Asiago 239 1 1 Bibcode 1970CoAsi 239 1B chi Psc SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2017 07 23 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 Valentini M Munari U November 2010 A spectroscopic survey of faint high Galactic latitude red clump stars I The high resolution sample Astronomy and Astrophysics 522 A79 arXiv 1007 0207 Bibcode 2010A amp A 522A 79V doi 10 1051 0004 6361 201014870 S2CID 119156545 in Chinese AEEA Activities of Exhibition and Education in Astronomy 天文教育資訊網 2006 年 5 月 19 日 Retrieved from https en wikipedia org w index php title Chi Piscium amp oldid 1121024406, wikipedia, wiki, book, books, library,

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