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Epsilon1 Arae

January 01, 1970

For other star systems with this Bayer designation, see Epsilon Arae.

Epsilon1 Arae (ε1 Ara, ε1 Arae) is the Bayer designation for a star in the constellation Ara, the Altar. It is visible to the naked eye with an apparent visual magnitude of +4.1[2] Based upon an annual parallax shift of 9.04 mas,[1] this star is around 360 light-years (110 parsecs) distant from the Earth.

Epsilon1 Arae
The location of ε1 Arae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ara
Right ascension 16h 59m 35.04880s[1]
Declination –53° 09′ 37.5713″[1]
Apparent magnitude (V) +4.068[2]
Characteristics
Spectral type K3 III[3]
U−B color index +1.71[4]
B−V color index +1.45[4]
Astrometry
Radial velocity (Rv)+23.1[5] km/s
Proper motion (μ) RA: +2.16[1] mas/yr
Dec.: +22.04[1] mas/yr
Parallax (π)9.04 ± 0.27 mas[1]
Distance360 ± 10 ly
(111 ± 3 pc)
Absolute magnitude (MV)–0.79 ± 0.16[6]
Details
Mass1.74 ± 0.24[7] M☉
Radius33.7 ± 3.4[7] R☉
Surface gravity (log g)1.80[2] cgs
Temperature4,176[2] K
Metallicity [Fe/H]0.08 ± 0.05[2] dex
Age1.70 ± 0.57[7] Gyr
Other designations
CPD–52° 10372, FK5 632, HD 152980, HIP 83153, HR 6295, SAO 244331.[8]
Database references
SIMBADdata

ε1 Arae is an evolved giant star[7] with a stellar classification of K3 III.[3] It is around 74% more massive than the Sun. At an age of about 1.7 billion years, the outer envelope of the star has expanded to almost 34 times the Sun's radius.[7] It is radiating energy into space at an effective temperature of 4,176 K,[2] giving it the orange-hued glow of a K-type star.[9]

ε1 Arae was known as 龜一(spelled as "Guī yī", meaning: "the 1st (star) of Guī") in traditional Chinese astronomy.[10][11] Allen erroneously called it Tso Kang (左更).[12] He probably confused the constellation "Ara" with "Ari", as Tso Kang is actually in Aries.[10][11]

References edit

  1. ^ a b c d e f 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 d e f Soubiran, C.; Le Campion, J.-F.; Cayrel de Strobel, G.; Caillo, A. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247, S2CID 118362423.
  3. ^ a b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  4. ^ a b Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
  5. ^ Wielen, R.; et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions", Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg, 35 (35), Astronomisches Rechen-Institut Heidelberg: 1, Bibcode:1999VeARI..35....1W.
  6. ^ Setiawan, J.; et al. (July 2004), "Precise radial velocity measurements of G and K giants. Multiple systems and variability trend along the Red Giant Branch", Astronomy and Astrophysics, 421: 241–254, Bibcode:2004A&A...421..241S, doi:10.1051/0004-6361:20041042-1.
  7. ^ a b c d e da Silva, L.; et al. (November 2006), "Basic physical parameters of a selected sample of evolved stars", Astronomy and Astrophysics, 458 (2): 609–623, arXiv:astro-ph/0608160, Bibcode:2006A&A...458..609D, doi:10.1051/0004-6361:20065105, S2CID 9341088.
  8. ^ "eps01 Ara". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-28.{{cite web}}: CS1 maint: postscript (link)
  9. ^ , Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on 2012-03-18, retrieved 2012-07-21.
  10. ^ a b Chevalier, S., and Tsuchihashi, P., (1911): "Catalogue d'Étoiles fixes, observés a Pekin sous l'Empereur Kien Long (Qianlong (Chien-Lung)), XVIIIe siecle", Annales de l'Observatoire Astronomique de Zô-Sé.
  11. ^ a b 伊世同 (Yi Shi Tong) (1981): 『中西対照恒星図表』科学出版社.(in Chinese)
  12. ^ Allen, R. H. (1963), Star Names: Their Lore and Meaning (Reprint ed.), New York, NY: Dover Publications Inc., p. 64, ISBN 0-486-21079-0.

Further reading edit

  • 大崎正次 (1987): 「中国の星座・星名の同定一覧表」『中国の星座の歴史』 雄山閣出版, pp. 312, 326.(in Japanese)

External links edit

  • Simbad Epsilon1 Arae
  • Image Epsilon1 Arae
  • AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 1 日 2011-09-28 at the Wayback Machine(in Chinese)

January 01, 1970
epsilon1, arae, other, star, systems, with, this, bayer, designation, epsilon, arae, arae, bayer, designation, star, constellation, altar, visible, naked, with, apparent, visual, magnitude, based, upon, annual, parallax, shift, this, star, around, light, years. For other star systems with this Bayer designation see Epsilon Arae Epsilon1 Arae e1 Ara e1 Arae is the Bayer designation for a star in the constellation Ara the Altar It is visible to the naked eye with an apparent visual magnitude of 4 1 2 Based upon an annual parallax shift of 9 04 mas 1 this star is around 360 light years 110 parsecs distant from the Earth Epsilon1 AraeThe location of e1 Arae circled Observation dataEpoch J2000 0 Equinox J2000 0 Constellation Ara Right ascension 16h 59m 35 04880s 1 Declination 53 09 37 5713 1 Apparent magnitude V 4 068 2 Characteristics Spectral type K3 III 3 U B color index 1 71 4 B V color index 1 45 4 AstrometryRadial velocity Rv 23 1 5 km sProper motion m RA 2 16 1 mas yr Dec 22 04 1 mas yrParallax p 9 04 0 27 mas 1 Distance360 10 ly 111 3 pc Absolute magnitude MV 0 79 0 16 6 DetailsMass1 74 0 24 7 M Radius33 7 3 4 7 R Surface gravity log g 1 80 2 cgsTemperature4 176 2 KMetallicity Fe H 0 08 0 05 2 dexAge1 70 0 57 7 Gyr Other designationsCPD 52 10372 FK5 632 HD 152980 HIP 83153 HR 6295 SAO 244331 8 Database referencesSIMBADdata e1 Arae is an evolved giant star 7 with a stellar classification of K3 III 3 It is around 74 more massive than the Sun At an age of about 1 7 billion years the outer envelope of the star has expanded to almost 34 times the Sun s radius 7 It is radiating energy into space at an effective temperature of 4 176 K 2 giving it the orange hued glow of a K type star 9 e1 Arae was known as 龜一 spelled as Gui yi meaning the 1st star of Gui in traditional Chinese astronomy 10 11 Allen erroneously called it Tso Kang 左更 12 He probably confused the constellation Ara with Ari as Tso Kang is actually in Aries 10 11 References edit a b c d e f 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 d e f Soubiran C Le Campion J F Cayrel de Strobel G Caillo A June 2010 The PASTEL catalogue of stellar parameters Astronomy and Astrophysics 515 A111 arXiv 1004 1069 Bibcode 2010A amp A 515A 111S doi 10 1051 0004 6361 201014247 S2CID 118362423 a b Houk Nancy 1978 Michigan catalogue of two dimensional spectral types for the HD stars vol 2 Ann Arbor Dept of Astronomy University of Michigan Bibcode 1978mcts book H a b Johnson H L et al 1966 UBVRIJKL photometry of the bright stars Communications of the Lunar and Planetary Laboratory 4 99 99 Bibcode 1966CoLPL 4 99J Wielen R et al 1999 Sixth Catalogue of Fundamental Stars FK6 Part I Basic fundamental stars with direct solutions Veroeffentlichungen des Astronomischen Rechen Instituts Heidelberg 35 35 Astronomisches Rechen Institut Heidelberg 1 Bibcode 1999VeARI 35 1W Setiawan J et al July 2004 Precise radial velocity measurements of G and K giants Multiple systems and variability trend along the Red Giant Branch Astronomy and Astrophysics 421 241 254 Bibcode 2004A amp A 421 241S doi 10 1051 0004 6361 20041042 1 a b c d e da Silva L et al November 2006 Basic physical parameters of a selected sample of evolved stars Astronomy and Astrophysics 458 2 609 623 arXiv astro ph 0608160 Bibcode 2006A amp A 458 609D doi 10 1051 0004 6361 20065105 S2CID 9341088 eps01 Ara SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2012 07 28 a href Template Cite web html title Template Cite web cite web a CS1 maint postscript link The Colour of Stars Australia Telescope Outreach and Education Commonwealth Scientific and Industrial Research Organisation December 21 2004 archived from the original on 2012 03 18 retrieved 2012 07 21 a b Chevalier S and Tsuchihashi P 1911 Catalogue d Etoiles fixes observes a Pekin sous l Empereur Kien Long Qianlong Chien Lung XVIIIe siecle Annales de l Observatoire Astronomique de Zo Se a b 伊世同 Yi Shi Tong 1981 中西対照恒星図表 科学出版社 in Chinese Allen R H 1963 Star Names Their Lore and Meaning Reprint ed New York NY Dover Publications Inc p 64 ISBN 0 486 21079 0 Further reading edit大崎正次 1987 中国の星座 星名の同定一覧表 中国の星座の歴史 雄山閣出版 pp 312 326 in Japanese External links editSimbad Epsilon1 Arae Image Epsilon1 Arae AEEA Activities of Exhibition and Education in Astronomy 天文教育資訊網 2006 年 7 月 1 日 Archived 2011 09 28 at the Wayback Machine in Chinese Retrieved from https en wikipedia org w index php title Epsilon1 Arae amp oldid 1213257814, wikipedia, wiki, book, books, library,

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