Alpha Arae

α Arae
Data pengamatan Epos J2000.0 Ekuinoks J2000.0 (ICRS)
α Arae (Choo) in the constellation Ara.
Rasi bintang	Ara
Asensio rekta	17^j 31^m 50.4933^d^[1]
Deklinasi	−49° 52′ 34.121″^[1]
Magnitudo tampak (V)	2.76 to 2.90^[2]
Ciri-ciri
Kelas spektrum	B3Ve
Indeks warna U−B	−0.69^[2]
Indeks warna B−V	−0.17^[2]
Indeks warna R−I	−0.24^[2]
Jenis variabel	BE^[3]
Astrometri

Kecepatan radial (R_v)	0^[1] km/s
Gerak diri (μ)	RA: −31.27^[1] mdb/thn Dek.: −67.15^[1] mdb/thn
Paralaks (π)	13,46±0,95^[1] mdb
Jarak	240 ± 20 tc (74 ± 5 pc)
Magnitudo mutlak (M_V)	−1.5^{[note 1]}

Detail

Massa	9.6 M_☉
Radius	4.8 R_☉
Luminositas (bolometrik)	5,800 L_☉
Suhu	18,000 K
Rotasi	12 h^{[note 2]}
Kecepatan rotasi (v sin i)	375 km/s

Penamaan lain
Choo, Tchou, α Ara, Alpha Arae, Alpha Ara, HJ 4955A, 2MASS J17315049-4952341, AAVSO 1724-49, CCDM J17318-4953A, CD−49°11511, CPC 0 16300, CPD−49°10052, CSI-49 11511 21, EM* MWC 261, FK5 651, GC 23708, GCRV 10116, GSC 08350-02600, HD 158427, Hen 3-1417, HIP 85792, HR 6510, IDS 17241-4948 A, IRAS 17279-4950, JP11 2859, N30 3898, NSV 8999, PLX 3969.1, PPM 323069, ROT 2456, SAO 228069, TD1 20501, TYC 8350-2600-1, UBV 14909, UBV M 22215, uvby98 100158427 A, WDS 17318-4953A.^[1]
Referensi basis data
SIMBAD	data

Alpha Arae (Alpha Ara / α Arae / α Ara) merupakan bintang tercerah kedua di rasi Ara. Bintang ini memiliki jarak 242 tahun cahaya dari Bumi dan bermagnitudo 2.84.

Etimologi

Bintang ini memiliki nama tradisional Tchou atau Choo, dari bahasa China 杵, atau Mandarin chǔ, yang berarti "alat penumbuk". Nama lain dari para astronom terdahulu adalah:

nama lain	asal bahasa	arti
杵二 / Chǔèr	China / Mandarin	bintang kedua pada rasi Alat Penumbuk^[4]
Quae est in media arae (Almagest)	Latin	yang berada di tengah altar^[5]

Referensi

1 2 3 4 5 6 7 V* alf Ara -- Eruptive variable Star, database entry, SIMBAD. Accessed on line November 26, 2008.
1 2 3 4 HR 6510, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 26, 2008.
↑ alf Ara, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 26, 2008.
↑ salah satu rasi bintang menurut bangsa Cina
↑ http://www.ac-ilsestante.it/ASTRONOMIA/costellazioni/costellazioni_finestra_manuale/costellazione_ara/stelle/D06_ALPHA_ARAE.html

Pranala luar

HR 6510, entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50.
α Arae Diarsipkan 2016-03-04 di Wayback Machine. at Alycone Software's Star Data Pages.
Image of Alpha Arae from Aladin.

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

↑ From apparent magnitude and parallax.
↑ From equatorial rotational velocity of 470 km/s and radius of 4.8 R_☉.

[sb0-1] 1 2 3 4 5 6 7 V* alf Ara -- Eruptive variable Star, database entry, SIMBAD. Accessed on line November 26, 2008.

[bsc1-2] 1 2 3 4 HR 6510, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 26, 2008.

[gcvs2-3] Ara, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 26, 2008.

[6] salah satu rasi bintang menurut bangsa Cina

[7] ttp://www.ac-ilsestante.it/ASTRONOMIA/costellazioni/costellazioni_finestra_manuale/costellazione_ara/stelle/D06_ALPHA_ARAE.html

[4] From apparent magnitude and parallax.

[5] From equatorial rotational velocity of 470 km/s and radius of 4.8 R_☉.

[1]

[2]

[3]

[note 1]

[note 2]

[4]

[5]

Etimologi

Referensi

Pranala luar

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