Spica

Alpha Virginis A/B
	; Lokasi Spica (pérangan kiwa ngisor tengah)
Dhata pangamatan; Epos J2000
Rasi lintang	Virgo
Asensio rekta	13j 25m 11.5793d
Dhéklinasi	−11° 09′ 40.759″
Magnitudo katon (V)	+1.04
Ciri-ciri
Kelas spektrum	B1 III-IV/B2 V
Indèks warna U-B	−0.94
Indèks warna B-V	−0.24
Jinis variabel	β Cep,; Rotating ellipsoid
Astrometri
Kacepetan radhial (Rv)	+1.0 km/s
Gerak dhiri (μ)	RA: −42.50 mas/taun ; Dek.: −31.73 mas/taun
Paralaks (π)	12.44 ± 0.86 mas
Let	260 ± 20 tc ; (80 ± 6 pc)
Magnitudo mutlak (MV)	−3.55 (−3.5/−1.5)
Orbit
Period (P)	4.0145898 d
Eccentricity (e)	0.067 ± 0.014
Inclination (i)	54 ± 6°
Periastron epoch (T)	2440678.09
Argument of periastron (ω); (secondary)	140 ± 10°
Detail
Primary
Massa	10.25 ± 0.68 M☉
Radhius	7.40 ± 0.57 R☉
Gravitasi permukaan (log g)	3.7 ± 0.1
Luminositas	12,100 L☉
Suhu	22,400 K
Kacepetan rotasi (v sin i)	199 ± 5 km/s
Secondary
Massa	6.97 ± 0.4 M☉
Radhius	3.64 ± 0.28 R☉
Luminositas	1,500 L☉
Suhu	18,500 K
Kacepetan rotasi (v sin i)	87 ± 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.

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

Spica kagolong lintang kang paling panas lan lumrahé duwé warna biru.

Rujukan

↑ ^a ^b ^c ^d ^e Perryman, M. A. C.; Lindegren; Kovalevsky; Hoeg; Bastian; Bernacca; Crézé; Donati; Grenon (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (pitulung)
↑ Schnerr, R. S. (June 2008). "Magnetic field measurements and wind-line variability of OB-type stars" (PDF). Astronomy and Astrophysics. 483 (3): 857–867. Bibcode:2008A&A...483..857S. doi:10.1051/0004-6361:20077740. Dibukak ing 2010-04-16. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (pitulung)^{[pranala mati permanèn]}
↑ ^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.{{cite journal}}: CS1 maint: multiple names: authors list (link)
↑ Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953QB901.W495.....
↑ ^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.{{cite journal}}: CS1 maint: multiple names: authors list (link)
↑ ^a ^b ^c ^d ^e ^f ^g 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.{{cite journal}}: CS1 maint: multiple names: authors list (link)
↑ ^a ^b ^c Kaler, Jim. "Spica". Stars. Dibukak ing 2010-04-15.
↑ "V* alf Vir -- Variable Star of beta Cep type". SIMBAD. Centre de Données astronomiques de Strasbourg. Dibukak ing 2010-04-13.

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[hipparcos-1] Perryman, M. A. C.; Lindegren; Kovalevsky; Hoeg; Bastian; Bernacca; Crézé; Donati; Grenon (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (pitulung)

[aaa483_3-2] Schnerr, R. S. (June 2008). "Magnetic field measurements and wind-line variability of OB-type stars" (PDF). Astronomy and Astrophysics. 483 (3): 857–867. Bibcode:2008A&A...483..857S. doi:10.1051/0004-6361:20077740. Dibukak ing 2010-04-16. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (pitulung)^{[pranala mati permanèn]}

[aj76-3] 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.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[gcsrv53-4] Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953QB901.W495.....

[mnras151-5] 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.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[apj704_1-6] ↑ ^a ^b ^c ^d ^e ^f ^g 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.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[kaler-7] Kaler, Jim. "Spica". Stars. Dibukak ing 2010-04-15.

[simbad-8] "V* alf Vir -- Variable Star of beta Cep type". SIMBAD. Centre de Données astronomiques de Strasbourg. Dibukak ing 2010-04-13.

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Dhata pangamatan Epos J2000
Lokasi Spica (pérangan kiwa ngisor tengah)
Rasi lintang	Virgo
Asensio rekta	13^j 25^m 11.5793^d^[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 (R_v)	+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 (M_V)	−3.55 (−3.5/−1.5)^[5]
Orbit^[6]
Period (P)	4.0145898 d
Eccentricity (e)	0.067 ± 0.014
Inclination (i)	54 ± 6°
Periastron epoch (T)	2440678.09
Argument of periastron (ω) (secondary)	140 ± 10°
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]