Spica

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Cithakan:Starbox orbit

Alpha Virginis A/B
Virgo constellation map.png
Lokasi Spica (sebelah kiwa ngisor tengah)
Dhata pangamatan
Epos J2000
Rasi lintang Virgo
Asensio rekta 13j 25m 11.5793d[1]
Dhéklinasi −11° 09′ 40.759″[1]
Magnitudo katon (V) +1.04
Ciri-ciri
Kelas spektrum B1 III-IV/B2 V[2]
Indèks warna U-B −0.94[3]
Indèks warna B-V −0.24[3]
Jinis variabel β Cep,
Rotating ellipsoid
Astrometri
Kacepetan radhial (Rv) +1.0[4] km/s
Gerak dhiri (μ) RA: −42.50[1] mas/taun
Dek.: −31.73[1] mas/taun
Paralaks (π) 12.44 ± 0.86[1] mas
Let 260 ± 20 tc
(80 ± 6 pc)
Magnitudo mutlak (MV) −3.55 (−3.5/−1.5)[5]
Detail
Primary
Massa 10.25 ± 0.68[6] M
Radhius 7.40 ± 0.57[6] R
Gravitasi permukaan (log g) 3.7 ± 0.1[5]
Luminositas 12,100[7] L
Suhu 22,400[5] K
Kacepetan rotasi (v sin i) 199 ± 5[6] km/s
Secondary
Massa 6.97 ± 0.4[6] M
Radhius 3.64 ± 0.28[6] R
Luminositas 1,500[7] L
Suhu 18,500[7] K
Kacepetan rotasi (v sin i) 87 ± 6[6] km/s
Pamènèhan jeneng liya
Spica, Azimech, 角宿一, Spica Virginis, Alaraph, Dana, α Virginis, 67 Virginis, HR 5056, BD -10°3672, HD 116658, GCTP 18144, FK5 498, CCDM 13252-1109, SAO 157923, HIP 65474.[8]


Spica (α Vir, α Virginis, Alpha Virginis) yakuwi lintang kang paling padhang ning rasi bintang Virgo, lan lintang paling padhang kaping 15 kang katon nalika bengi. Lintang iki dhuweni jarak kira-kira 260 tahun cahaya saka Bumi. Lintang iki uga dikenal dadi raksasa biru, lan kagolong variable saka Beta Cephei type.

Spica kagolong lintang kang paling panas lan umumé duweni werna biru.



Rujukan[sunting | sunting sumber]

  1. ^ a b c d e Perryman, M. A. C.; Lindegren; Kovalevsky; Hoeg; Bastian; Bernacca; Crézé; Donati et al.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics 323: L49–L52. Bibcode 1997A&A...323L..49P.
  2. ^ Schnerr, R. S.; et al. (June 2008). "Magnetic field measurements and wind-line variability of OB-type stars". Astronomy and Astrophysics 483 (3): 857–867. Bibcode 2008A&A...483..857S. doi:10.1051/0004-6361:20077740. http://remote.science.uva.nl/~rschnerr/papers/OBstars.pdf. Retrieved 2010-04-16.
  3. ^ a b Pfleiderer, J.; Mayer, U. (October 1971). "Near-ultraviolet surface photometry of the southern Milky Way". Astronomical Journal 76: 691. Bibcode 1971AJ.....76..691P. doi:10.1086/111186.
  4. ^ Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode 1953QB901.W495......
  5. ^ a b c Herbison-Evans, D.; Hanbury Brown, R.; Davis, J.; Allen, L. R.; Hanbury Brown; Davis; Allen (1971). "A study of alpha Virginis with an intensity interferometer". Monthly Notices of the Royal Astronomical Society 151: 161−176. Bibcode 1971MNRAS.151..161H.
  6. ^ a b c d e f Harrington, David; Koenigsberger, Gloria; Moreno, Edmundo; Kuhn, Jeffrey (October 2009). "Line-profile Variability from Tidal Flows in Alpha Virginis (Spica)". The Astrophysical Journal 704 (1): 813–830. Bibcode 2009ApJ...704..813H. doi:10.1088/0004-637X/704/1/813.
  7. ^ a b c Kaler, Jim. "Spica". Stars. http://stars.astro.illinois.edu/sow/spica.html. Retrieved 2010-04-15.
  8. ^ "V* alf Vir -- Variable Star of beta Cep type". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=alf+Vir. Retrieved 2010-04-13.

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