70 Virginis

70 Virginis
	; 70 Virginis
Data pengamatan; Epos J2000.0 Ekuinoks J2000.0
Rasi bintang	Virgo
Asensio rekta	13j 28m 25.81d
Deklinasi	+13° 46′ 43.6″
Magnitudo tampak (V)	+5.00
Ciri-ciri
Kelas spektrum	G4 V-IV
Indeks warna U−B	0.26
Indeks warna B−V	0.71
Indeks warna V−R	0.39
Indeks warna R−I	0.36
Jenis variabel	tidak ada
Astrometri
Kecepatan radial (Rv)	5 km/s
Gerak diri (μ)	RA: −236.02 ± 0.24 mdb/thn ; Dek.: −575.73 ± 0.19 mdb/thn
Paralaks (π)	55,60±0,17 mdb
Jarak	58,7 ± 0,2 tc ; (17,99 ± 0,05 pc)
Magnitudo mutlak (MV)	+3.70 ± 0.01
Detail
Massa	1.12 M☉
Radius	1.9 ± 0.1 R☉
Luminositas	2.92 ± 0.03 L☉
Gravitasi permukaan (log g)	3.58
Suhu	5,406 ± 64 K
Metalisitas [Fe/H]	−0.06
Usia	7.9 gigatahun
Penamaan lain
	HD 117176, HIP 65721, HR 5072, BD+14°2621, Gl 512.1, WDS 13284+1347A, and SAO 100582.
Referensi basis data
SIMBAD	data
Exoplanet Archive	data
ARICNS	data
Extrasolar Planets; Encyclopaedia	data

70 Virginis (disingkat 70 Vir) adalah bintang kerdil kuning yang berjarak sekitar 59 tahun cahaya^[1]di konstelasi Virgo. Bintang ini memiliki cahaya luar biasa cerah untuk jenis spektral dan mungkin baru mulai berkembang ke fase Raksasa merah.

Pada tahun 1996, 70 Virginis diketahui memiliki planet luar surya yang mengorbit mengelilinginya.^[7] Ada juga piringan debu dengan suhu maksimum 153 K terletak pada jarak 3,4 AU dari bintang.^[8]

Sistem planet

Penemuan planet disekeliling 70 Virginis diumumkan pada 17 Januari 1996 pada pertemuan American Astronomical Society di San Antonio, Texas. Planet itu terdeteksi menggunakan pengukuran kecepatan radial yang diambil dengan teleskop C. Donald Shane di Observatorium Lick.^[9]^[7]

Sistem keplanetan 70 Virginis^[10]
Anggota (diurut dari bintang)	Massa	Sumbu semimayor (AU)	Periode orbit (hari)	Eksentrisitas	Inklinasi	Jari-jari
b	>7,40±0,02 M_J	0,481±0,003	116,6926±0,0014	0,399±0,002	—	—

Referensi

^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (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. Vizier catalog entry
^ Strassmeier, K. G.; Ilyin, I.; Weber, M. (2017). "PEPSI deep spectra. II. Gaia benchmark stars and other M-K standards". arΧiv:1712.06967 [astro-ph.EP].
^ Holmberg; et al. (2009). "HD 117176". Geneva-Copenhagen Survey of Solar neighbourhood III. Diakses tanggal 2010-02-02.
^ Shaya, Ed J.; Olling, Rob P. (January 2011), "Very Wide Binaries and Other Comoving Stellar Companions: A Bayesian Analysis of the Hipparcos Catalogue", The Astrophysical Journal Supplement, 192 (1): 2, arXiv:1007.0425  , Bibcode:2011ApJS..192....2S, doi:10.1088/0067-0049/192/1/2
^ Gerard T. van Belle & Kaspar von Braun (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars" (abstract). The Astrophysical Journal. 694 (2): 1085–1098. arXiv:0901.1206  . Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085. (web Preprint)
^ ^a ^b ^c ^d Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal, 771 (1): 31, arXiv:1306.2974  , Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40, 40.
^ ^a ^b Marcy, Geoffrey W.; Butler, R. Paul (1996). "A Planetary Companion to 70 Virginis". The Astrophysical Journal Letters. 464 (1): L147–L151. Bibcode:1996ApJ...464L.147M. doi:10.1086/310096.
^ Trilling, D. E.; et al. (2008). "Debris Disks around Sun-like Stars". The Astrophysical Journal. 674 (2): 1086–1105. arXiv:0710.5498  . Bibcode:2008ApJ...674.1086T. doi:10.1086/525514.
^ Sanders, Robert (January 17, 1996). "Discovery of two new planets -- the second and third within the last three months -- proves they aren't rare in our galaxy" (Siaran pers). University of California, Berkeley. Diakses tanggal December 22, 2017.
^ Kane, Stephen R.; et al. (2015). "A Comprehensive Characterization of the 70 Virginis Planetary System". The Astrophysical Journal. 806. 60. arXiv:1504.04066  . Bibcode:2015ApJ...806...60K. doi:10.1088/0004-637X/806/1/60.

Sumber

:bintang 70 virginis

Artikel bertopik bintang ini adalah sebuah rintisan. Anda dapat membantu Wikipedia dengan mengembangkannya.

[van_Leeuwen2007-1] ^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (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. Vizier catalog entry

[Strassmeier2017-2] Strassmeier, K. G.; Ilyin, I.; Weber, M. (2017). "PEPSI deep spectra. II. Gaia benchmark stars and other M-K standards". arΧiv:1712.06967 [astro-ph.EP].

[Holmberg-3] Holmberg; et al. (2009). "HD 117176". Geneva-Copenhagen Survey of Solar neighbourhood III. Diakses tanggal 2010-02-02.

[apjss192_1_2-4] Shaya, Ed J.; Olling, Rob P. (January 2011), "Very Wide Binaries and Other Comoving Stellar Companions: A Bayesian Analysis of the Hipparcos Catalogue", The Astrophysical Journal Supplement, 192 (1): 2, arXiv:1007.0425  , Bibcode:2011ApJS..192....2S, doi:10.1088/0067-0049/192/1/2

[Belle-5] Gerard T. van Belle & Kaspar von Braun (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars" (abstract). The Astrophysical Journal. 694 (2): 1085–1098. arXiv:0901.1206  . Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085. (web Preprint)

[apj771_1_40-6] Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal, 771 (1): 31, arXiv:1306.2974  , Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40, 40.

[Marcy1996-7] Marcy, Geoffrey W.; Butler, R. Paul (1996). "A Planetary Companion to 70 Virginis". The Astrophysical Journal Letters. 464 (1): L147–L151. Bibcode:1996ApJ...464L.147M. doi:10.1086/310096.

[Trilling2008-8] Trilling, D. E.; et al. (2008). "Debris Disks around Sun-like Stars". The Astrophysical Journal. 674 (2): 1086–1105. arXiv:0710.5498  . Bibcode:2008ApJ...674.1086T. doi:10.1086/525514.

[berkeley-9] Sanders, Robert (January 17, 1996). "Discovery of two new planets -- the second and third within the last three months -- proves they aren't rare in our galaxy" (Siaran pers). University of California, Berkeley. Diakses tanggal December 22, 2017.

[Kane2015-10] Kane, Stephen R.; et al. (2015). "A Comprehensive Characterization of the 70 Virginis Planetary System". The Astrophysical Journal. 806. 60. arXiv:1504.04066  . Bibcode:2015ApJ...806...60K. doi:10.1088/0004-637X/806/1/60.

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