Beta Arietis

Beta Arietis
Data pengamatan Epos J2000 Ekuinoks J2000
Beta Arietis
Rasi bintang	Aries
Asensio rekta	01^h 54^m 38.4^s
Deklinasi	+20° 48′ 29″
Magnitudo tampak (V)	2.64
Ciri-ciri
Kelas spektrum	A5V
Indeks warna U−B	0.1
Indeks warna B−V	0.13
Indeks warna R−I	-0.02
Astrometri

Kecepatan radial (R_v)	-1.9 km/s
Gerak diri (μ)	RA: 96.32 mdb/thn Dek.: -108.8 mdb/thn
Paralaks (π)	54,74±0,75 mdb
Jarak	59,6 ± 0,8 tc (18,3 ± 0,3 pc)
Magnitudo mutlak (M_V)	2.77

Detail

Massa	2.00/1.02 M_☉
Radius	2.1 R_☉
Luminositas	22 L_☉
Suhu	8200 K
Rotasi	79 km/s 0,003689549665744 Tahun

Orbit bintang ganda visual
Bintang sekunder	Beta Arietis B
Periode (P)	0.29295 tahun
Sumbu semi-mayor (a)	0.0361 ± 0.0003"
Eksentrisitas (e)	0.903 ± 0.012 °
Inklinasi (i)	44.7 ± 1.3°
Bujur node (Ω)	79.1 ± 0.8°
Epoch periastron (T)	209.1 ± 1.2 °
Penamaan lain
Sheratan, Sharatan, Al Sharatain, 6 Arietis, Gl 80, HR 553, BD +20°306, HD 11636, GCTP 394.00, SAO 75012, FK5 66, GC 2309, CCDM 01546+2048, HIP 8903.
Referensi basis data
SIMBAD	data
ARICNS	data

Beta Arietis (β Ari / β Arietis) adalah satu bintang pada rasi bintang Aries, berada di posisi tanduk kedua Sang Domba. Bintang ini memiliki magnitudo 2.64 dan tergolong bintang dengan kelas A5V (white main sequence star). Bintang ini berada pada jarak 60 tahun cahaya dari Bumi.

Beta Arietis tergolong bintang ganda dengan periode orbit 107 hari.

Etimologi

Nama tradisional dari bintang ini adalah Al Sharatan (atau Sharatan, Sheratim), berasal dari bahasa Arab الشراطان aš-šarāţān "dua tanda". Nama lain dari para astronom terdahulu adalah:

nama lain	asal bahasa	arti
婁宿一 / Lóu Su yī	China	bintang pertama pada rasi Tali Ikatan^[1][1][2]
婁宿距星 / Lóu Su jùxīng	China	bintang yang terpencil di rasi Tali Ikatan^[2]
婁宿中央大星 / Lóu Su zhōngyāngdàxīng	China	bintang besar di tengah rasi Tali Ikatan^[2]
Shemali al Sheratain / Borealior Signorum	Arab / Latin	tanda di utara dari dua tanda^[3]
Sequens ipsarum (Almagest)	Latin	yang selalu mengikuti^[4]

Selain rasi Aries, bintang ini juga merupakan anggota dari berbagai rasi atau asterisma berikut:

nama rasi / asterisma	asal	arti	anggota lainnya
Mahru-sha-rishu-ku^[2]	Babilonia	bagian depan kepala Ku	γ Ari
Padevar^[2]	Persia	pasangan yang melindungi	γ Ari
Bashish^[2]	Sogdia	pelindung	γ Ari
Pikutorion^[2]	Koptik		γ Ari
Shalisha^[2]	Yahudi		α Ari, γ Ari
Al Sharatain	Arab	dua tanda	α Ari, γ Ari
Ashvini (अश्विनी)	Hindu	kuda betina	γ Ari
婁宿三 / Lóu	China	Tali Ikatan	α Ari, γ Ari

Lokasi

Referensi

^ salah satu rasi bintang menurut bangsa Cina
^ ^a ^b ^c ^d ^e ^f ^g http://www.chinese-tools.com/tools/sinograms.html Kesalahan pengutipan: Tanda <ref> tidak sah; nama "sb0" didefinisikan berulang dengan isi berbeda
^ http://articles.adsabs.harvard.edu//full/1895MNRAS..55..429K/0000432.000.html
^ http://www.ac-ilsestante.it/ASTRONOMIA/costellazioni/costellazioni_finestra_manuale/costellazione_aries/stelle/D07_BETA_ARIETIS.html

GJ 80 Catalog
Image Beta Arietis
Pan, X. P.; Shao, M.; Colavita, M. M.; Mozurkewich, D.; Simon, R. S.; Johnston, K. J. (1990). "Apparent orbit of the spectroscopic binary Beta ARIETIS with the time Mark III Stellar Interferometer". Astrophysical Journal. 356: 641 – 645. doi:10.1086/168870.

Pranala luar

Beta Arietis Diarsipkan 2006-07-14 di Wayback Machine. by Professor Jim Kaler.
ARICNS entry Diarsipkan 2005-11-12 di Wayback Machine.
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