Beta Cephei

Beta Cephei
Data pengamatan Epos J2000 Ekuinoks J2000
Beta Cephei
Rasi bintang	Cepheus
Asensio rekta	21h 28m 39.5971s
Deklinasi	+70° 33' 38.578"'
Magnitudo tampak (V)	3.216^[1]
Ciri-ciri
Kelas spektrum	B2IIIV
Indeks warna U−B	?
Indeks warna B−V	-0.201^[2]
Jenis variabel	Variable Star of beta Cep type
Astrometri

Kecepatan radial (R_v)	-8.2 km/s
Gerak diri (μ)	RA: 12.60 mdb/thn Dek.: 8.73 mdb/thn
Paralaks (π)	5,48±0,47 mdb
Jarak	600 ± 50 tc (180 ± 20 pc)
Magnitudo mutlak (M_V)	-3.015

Detail

Massa	12 M_☉
Radius	? R_☉
Luminositas	14.600 L_☉
Suhu	? K
Metalisitas	?
Rotasi	?
Usia	? tahun

Penamaan lain
FK5 809, SBC7 859, * 8 Cep, GC 30118, ADS 15032 A, GCRV 13520, MCW 989, TD1 28199, AG+70° 738, N30 4748, TYC 4465-2643-1, BD+69 1173, GSC 04465-02643, ALFIRK, HD 205021, PLX 5192, CSI+69° 1173 1, HGAM 1007, 2E 2128.0+7020, HIC 106032, PPM 10863, AAVSO 2127+70, 2E 4480, HIP 106032, ROT 3532, EUVE J2128+70.5, HR 8238, SAO 10057.
Referensi basis data
SIMBAD	data

Beta Cephei (β Cep / β Cephei) adalah salah satu bintang yang berada di rasi Cepheus.

Beta Cephei memiliki magnitudo bervariasi antara +3.15 dan +3.21 dengan periode orbit 0.1904844 days. Bintang ini tergolong bintang tipe B2IIIev dan berada pada jarak 595 tahun cahaya dari Bumi.

Etimologi

Bintang ini memiliki nama tradisional Alfirk, yang berasal dari bahasa Arab الفرقة al-firqah, yang berarti "kelompok" (mewakili arti dari "sekelompok kambing"). Nama lain yang diberikan oleh para astronom adalah

nama lain	asal bahasa	arti
上衛增一 / Shǎngwèizēngyī	China	bintang lanjutan pertama Pengawal Kerajaan Pertama^[3]^[4]
Ficares	Latin	^[5]

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

nama rasi / asterisma	asal	arti	anggota lainnya
K^[5]^[6]		huruf K	γ Cep, ζ Cep, ε Cep, ν Cep, ξ Cep, κ Cep
House of Cepheus^[7]		rumah Cepheus	α Cep, γ Cep, ι Cep, λ Cep
Al Kawākib al Firḳ	Arab	kumpulan bintang	α Cep, η Cep^[5]

Referensi

^ Norton has 3.3
^ From SIMBAD: Fluxes .. B 3.015 and V 3.216
^ http://www.chinese-tools.com/tools/sinograms.html
^ bintang ini berkemungkinan merupakan lanjutan dari posisi "Pengawal Kerajaan Kedua", yaitu 43 Cam
^ ^a ^b ^c http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Cepheus*.html
^ posisi huruf K ini berada di depan rasi Cassiopeia
^ "Salinan arsip". Diarsipkan dari versi asli tanggal 2011-01-01. Diakses tanggal 2011-01-01.

http://jumk.de/astronomie/prototype-stars/beta-cephei.shtml
"HD 205021 -- Variable Star of beta Cep type". SIMBAD Astronomical Database. Diakses tanggal 2007-03-01.

Pranala luar

Yale Bright Star Catalog; click on Cepheus

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

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