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Pi Arietis

October 20, 2023

Pi Arietis, Latinized from π Arietis, is the Bayer designation for a multiple star system in the northern constellation of Aries. Based upon parallax measurements made during the Hipparcos mission, this system is approximately 800 light-years (250 parsecs) distant from Earth and has an apparent visual magnitude of 5.21. This is bright enough to be faintly seen with the naked eye.

π Arietis
Location of π Arietis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 02h 49m 17.55924s[1]
Declination +17° 27′ 51.5168″[1]
Apparent magnitude (V) 5.21[2]
Characteristics
Spectral type B6 V + A0 V + F8 V[3]
U−B color index –0.47[2]
B−V color index –0.06[2]
Astrometry
Radial velocity (Rv)+8.8[4] km/s
Proper motion (μ) RA: +2.60[1] mas/yr
Dec.: –14.10[1] mas/yr
Parallax (π)4.18 ± 0.69 mas[1]
Distanceapprox. 800 ly
(approx. 240 pc)
Absolute magnitude (MV)−1.56[5]
Details
Luminosity538[5] L☉
Rotational velocity (v sin i)70[6] km/s
Other designations
π Ari, 42 Arietis, BD+16° 355, HD 17543, HIP 13165, HR 836, SAO 93127.[7]
Database references
SIMBADdata

The primary member of this system is a massive, B-type main sequence star with a stellar classification of B6 V. It is a close spectroscopic binary with an orbital period of 3.854 days, an eccentricity of 0.04, and a combined visual magnitude of 5.30. At an angular separation of 3.28 arcseconds is a magnitude 8.46 A-type main sequence star with a classification of A0 Vp. Finally, a fourth member of the system is a magnitude 11.0 F-type main sequence star with a classification of F8V at an angular separation of 25.2 arcseconds from the primary.[3]

Name Edit

This star, along with δ Ari, ε Ari, ζ Ari, and ρ3 Ari, were Al Bīrūnī's Al Buṭain (ألبطين), the dual of Al Baṭn, the Belly.[8] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Buṭain were the title for five stars : δ Ari as Botein, π Ari as Al Buṭain I, ρ3 Ari as Al Buṭain II, ε Ari as Al Buṭain III dan ζ Ari as Al Buṭain IV.[9]

In Chinese, 左更 (Zuǒ Gēng), meaning Official in Charge of the Forest, refers to an asterism consisting of π Arietis, ν Arietis, μ Arietis, ο Arietis and σ Arietis.[10] Consequently, the Chinese name for π Arietis itself is 左更五 (Zuǒ Gēng wu, English: the Fifth Star of Official in Charge of the Forest.)[11]

References Edit

  1. ^ a b c d e van Leeuwen, F. (November 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 Crawford, D. L.; Barnes, J. V.; Golson, J. C. (1971), "Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere", The Astronomical Journal, 76: 1058, Bibcode:1971AJ.....76.1058C, doi:10.1086/111220.
  3. ^ a b 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.
  4. ^ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
  5. ^ 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, S2CID 119257644.
  6. ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590.
  7. ^ "pi. Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-07.
  8. ^ Allen, R. H. (1963), Star Names: Their Lore and Meaning (Reprint ed.), New York, NY: Dover Publications Inc, p. 83, ISBN 0-486-21079-0, retrieved 2010-12-12.
  9. ^ Rhoads, Jack W. (November 15, 1971), "Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars" (PDF), Jet Propulsion Laboratory, California Institute of Technology.
  10. ^ (in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
  11. ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 21 日

External links Edit

  • Aladin previewer
  • Aladin sky atlas
  • HR 836

October 20, 2023
arietis, latinized, from, arietis, bayer, designation, multiple, star, system, northern, constellation, aries, based, upon, parallax, measurements, made, during, hipparcos, mission, this, system, approximately, light, years, parsecs, distant, from, earth, appa. Pi Arietis Latinized from p Arietis is the Bayer designation for a multiple star system in the northern constellation of Aries Based upon parallax measurements made during the Hipparcos mission this system is approximately 800 light years 250 parsecs distant from Earth and has an apparent visual magnitude of 5 21 This is bright enough to be faintly seen with the naked eye p ArietisLocation of p Arietis circled Observation dataEpoch J2000 Equinox J2000Constellation AriesRight ascension 02h 49m 17 55924s 1 Declination 17 27 51 5168 1 Apparent magnitude V 5 21 2 CharacteristicsSpectral type B6 V A0 V F8 V 3 U B color index 0 47 2 B V color index 0 06 2 AstrometryRadial velocity Rv 8 8 4 km sProper motion m RA 2 60 1 mas yr Dec 14 10 1 mas yrParallax p 4 18 0 69 mas 1 Distanceapprox 800 ly approx 240 pc Absolute magnitude MV 1 56 5 DetailsLuminosity538 5 L Rotational velocity v sin i 70 6 km sOther designationsp Ari 42 Arietis BD 16 355 HD 17543 HIP 13165 HR 836 SAO 93127 7 Database referencesSIMBADdataThe primary member of this system is a massive B type main sequence star with a stellar classification of B6 V It is a close spectroscopic binary with an orbital period of 3 854 days an eccentricity of 0 04 and a combined visual magnitude of 5 30 At an angular separation of 3 28 arcseconds is a magnitude 8 46 A type main sequence star with a classification of A0 Vp Finally a fourth member of the system is a magnitude 11 0 F type main sequence star with a classification of F8V at an angular separation of 25 2 arcseconds from the primary 3 Name EditThis star along with d Ari e Ari z Ari and r3 Ari were Al Biruni s Al Buṭain ألبطين the dual of Al Baṭn the Belly 8 According to the catalogue of stars in the Technical Memorandum 33 507 A Reduced Star Catalog Containing 537 Named Stars Al Buṭain were the title for five stars d Ari as Botein p Ari as Al Buṭain I r3 Ari as Al Buṭain II e Ari as Al Buṭain III dan z Ari as Al Buṭain IV 9 In Chinese 左更 Zuǒ Geng meaning Official in Charge of the Forest refers to an asterism consisting of p Arietis n Arietis m Arietis o Arietis and s Arietis 10 Consequently the Chinese name for p Arietis itself is 左更五 Zuǒ Geng wu English the Fifth Star of Official in Charge of the Forest 11 References Edit a b c d e van Leeuwen F November 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 Crawford D L Barnes J V Golson J C 1971 Four color H beta and UBV photometry for bright B type stars in the northern hemisphere The Astronomical Journal 76 1058 Bibcode 1971AJ 76 1058C doi 10 1086 111220 a b 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 Wilson Ralph Elmer 1953 General Catalogue of Stellar Radial Velocities Carnegie Institute Washington D C Publication Washington Carnegie Institution of Washington Bibcode 1953GCRV C 0W 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 S2CID 119257644 Abt Helmut A Levato Hugo Grosso Monica July 2002 Rotational Velocities of B Stars The Astrophysical Journal 573 1 359 365 Bibcode 2002ApJ 573 359A doi 10 1086 340590 pi Ari SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2012 08 07 Allen R H 1963 Star Names Their Lore and Meaning Reprint ed New York NY Dover Publications Inc p 83 ISBN 0 486 21079 0 retrieved 2010 12 12 Rhoads Jack W November 15 1971 Technical Memorandum 33 507 A Reduced Star Catalog Containing 537 Named Stars PDF Jet Propulsion Laboratory California Institute of Technology in Chinese 中國星座神話 written by 陳久金 Published by 台灣書房出版有限公司 2005 ISBN 978 986 7332 25 7 in Chinese AEEA Activities of Exhibition and Education in Astronomy 天文教育資訊網 2006 年 5 月 21 日External links EditAladin previewer Aladin sky atlas HR 836 Retrieved from https en wikipedia org w index php title Pi Arietis amp oldid 1119021723, wikipedia, wiki, book, books, library,

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