- Beta Eridani
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β Eridani Observation data
Epoch J2000.0 Equinox J2000.0 (ICRS)Constellation Eridanus Right ascension 05h 07m 50.9851s[1] Declination −05° 05′ 11.206″[1] Apparent magnitude (V) 2.72 to 2.80[2] Characteristics Spectral type A3III[1] U−B color index +0.10[3] B−V color index +0.13[3] R−I color index +0.08[3] Astrometry Other designations Database references SIMBAD data Beta Eridani (Beta Eri, β Eridani, β Eri) is the second brightest star in the constellation of Eridanus, located in the northeast end of this constellation. It has the traditional names Cursa.[3][5]
The term Cursa is derived from Al Kursiyy al Jauzah, "the Chair (or "Footstool") of the Central One". This is the name of star association consisting this star, along with λ Eri, ψ Eri and τ Ori[6]
According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Kursiyy al Jauzah were the title for three stars :β Eri as Cursa, ψ Eridani as Al Kursiyy al Jauzah I and λ Eridani as Al Kursiyy al Jauzah II (exclude τ Orionis)[7]
In Chinese, 玉井 (Yù Jǐng), meaning Jade Well, refers to an asterism consisting of β Eridani, λ Eridani, ψ Eridani and τ Orionis.[8] Consequently, β Eridani itself is known as 玉井三 (Yù Jǐng sān, English: the Third Star of Jade Well.).[9] From this Chinese name, the name Yuh Tsing was appeared.[10]
Properties
β Eridani has an apparent visual magnitude which varies between 2.72 and 2.80 and a spectral type of A3III. It is approximately 90 light-years from the Earth.[1][2] It may be a member of the proposed Sirius Supercluster, along with other scattered stars such as Sirius itself, Beta Aurigae, Alpha Coronae Borealis, Zeta Crateris, and Beta Serpentis.[11]
Visual companion
CCDM J05079-0506B Observation data
Epoch J2000.0 Equinox J2000.0 (ICRS)Constellation Eridanus Right ascension 05h 07m 55.8s[12] Declination −05° 06′ 38″[12] Apparent magnitude (V) 10.9[12] Position (relative to A) Epoch of observation 1998 Angular distance 117.1″ [4] Position angle 137° [4] Other designations Database references SIMBAD data β Eridani has a visual companion, CCDM J05079-0506B, which has an apparent visual magnitude of approximately 10.9.[12]
References
- ^ a b c d e SV* ZI 351 -- Variable Star, database entry, SIMBAD. Accessed on line September 17, 2008.
- ^ a b NSV 1841, database entry, New Catalogue of Suspected Variable Stars, the improved version, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 17, 2008.
- ^ a b c d e HR 1666, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 17, 2008.
- ^ a b c d Entry 05078-0505, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line September 17, 2008.
- ^ Cursa, Stars, Jim Kaler. Accessed on line September 17, 2008.
- ^ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York, NY: Dover Publications Inc. p. 218. ISBN 0486210790. http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Eridanus*.html. Retrieved 2010-12-12.
- ^ Jack W. Rhoads - Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971
- ^ (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 9789867332257.
- ^ (Chinese) 香港太空館 - 研究資源 - 亮星中英對照表, Hong Kong Space Museum. Accessed on line November 23, 2010.
- ^ Richard Hinckley Allen: Star Names — Their Lore and Meaning: Eridanus
- ^ Eggen, Olin J. (1992). "The Sirius supercluster in the FK5". Astronomical Journal 104 (4): 1493–1504. Bibcode 1992AJ....104.1493E. doi:10.1086/116334.
- ^ a b c d e BD-05 1162B -- Star in double system, database entry, SIMBAD. Accessed on line September 17, 2008.
Bayer α (Achernar) • β (Cursa) • γ (Zaurak) • δ (Rana) • ε • ζ (Zibal) • η (Azha) • θ (Acamar) • ι • κ • λ • μ • ν • ξ • ο¹ (Beid) • ο² (Keid) • π • ρ¹ (rho-1) • ρ² (rho-2) • ρ³ (rho-3) • τ¹ • τ² (Angetenar) • τ³ • τ4 • υ¹ (Theemin) • υ² (Beemin) • υ³ • φ • χ • ψ • ω • b • c • d • e (82 G.) • f • g • h • i • l (Sceptrum) • p • q¹ • q² • s • v • w • y • AFlamsteed 1 (τ¹) • 2 (τ², Angetenar) • 3 (η, Azha) • 4 • 5 • 6 • 7 • 8 (ρ¹, rho-1) • 9 (ρ², rho-2) • 10 (ρ³, rho-3) • 11 (τ<³) • 13 (ζ, Zibal) • 14 • 15 • 16 (τ4) • 17 • 18 (ε) • 20 • 21 • 22 • 23 (δ, Rana) • 24 • 25 • 26 (π) • 29 • 30 • 32 (w) • 34 (γ, Zaurak) • 35 • 37 • 38 (ο¹, Beid) • 39 (A) • 40 (ο², Keid) • 42 (ξ) • 45 • 46 • 47 • 48 (ν) • 50 (υ¹, Theemin) • 51 (c) • 52 (υ², Beemin) • 53 (l, Sceptrum) • 54 • 55 • 56 • 57 (μ) • 58 • 59 • 60 • 61 (ω) • 62 (b) • 63 • 64 • 65 (ψ) • 66 • 67 (β, Cursa) • 68 • 69 (λ)Nearby List Categories:- Eridanus constellation
- A-type giants
- Double stars
- Bayer objects
- Flamsteed objects
- Henry Draper Catalogue objects
- HIP objects
- Durchmusterung objects
- Stars with proper names
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