Beta Coma Berenices (β Comae Berenices, β Com) adalah bintang katai di rasi Coma Berenices. Bintang ini berada pada jarak 30 tahun cahaya. Meskipun dinamakan beta, tetapi kenyataaannya bintang ini lebih terang daripada α Com, yaitu bermagnitudo 4.23

Beta Comae Bernices
Data pengamatan Epos J2000 Ekuinoks J2000
Location of β Coma Bernices (upper left)
Rasi bintang	Coma Berenices
Asensio rekta	13^j 11^m 52.3935^d
Deklinasi	+27° 52′ 41.459″
Magnitudo tampak (V)	4.26
Ciri-ciri
Kelas spektrum	F9.5V or G0V^{[butuh rujukan]}
Indeks warna U−B	0.07
Indeks warna B−V	0.57
Jenis variabel	None
Astrometri

Kecepatan radial (R_v)	+6.1 km/s
Gerak diri (μ)	RA: -801.44 mdb/thn Dek.: 882.04 mdb/thn
Paralaks (π)	109,54±0,17 mdb
Jarak	29,78 ± 0,05 tc (9,13 ± 0,01 pc)
Magnitudo mutlak (M_V)	4.45

Detail

Massa	1.15 M_☉
Radius	1.09 R_☉
Luminositas	1.42 L_☉
Gravitasi permukaan (log g)	4.38
Suhu	6,029 K
Metalisitas
Rotasi	~10 days
Kecepatan rotasi (v sin i)	10 km/s
Usia	(1.5–2.5) × 10⁹ tahun

Penamaan lain
43 Com, Beta Com, Gl 502, GJ 876, HD 114710, HR 4983, BD +28°2193, GCTP 3015.00, LHS 348, LFT 978, LTT 13815, SAO 82706, FK5 492, HIP 64394.

Etimologi sunting

Nama lain dari para astronom terdahulu adalah:

nama lain	asal bahasa	arti
周鼎一 / Zhōu dǐngyī	Cina	bintang pertama pada rasi Segitiga Zhou

Referensi sunting

^ Perryman, M. A. C.; et al. (1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
^ Mallik, Sushma V. (1998). "Chromospheric activity in cool stars and the lithium abundance". Astronomy and Astrophysics. 338: 623–636. Bibcode:1998A&A...338..623M.
Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953QB901.W495.....
^ van Leeuwen, Floor (2007). Hipparcos, the new Reduction of the Raw data. Astrophysics and Space Science Library. 350. Bibcode:2007A&A...474..653V. ISBN 9781402063411. Note: see VizieR catalogue I/311.
^ Takeda, G. (2007). "Stellar parameters of nearby cool stars. II. Physical properties of ~1000 cool stars from the SPOCS catalog". Astrophysical Journal Supplement Series. 168: 297–318. Bibcode:2008yCat..21680297T. Note: see VizieR catalogue J/ApJS/168/297.
Mamajek, Eric E.; Hillenbrand, Lynne A. (2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal. 687 (2): 1264–1293. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.
salah satu rasi bintang menurut bangsa Cina

Pranala luar= sunting

Q: Beta Comae Berenices

Beta Comae Berenices Beta Coma Berenices β Comae Berenices β Com adalah bintang katai di rasi Coma Berenices Bintang ini

SolStation entry

[hipparcos-1] Perryman, M. A. C.; et al. (1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.

[aaa338-2] Mallik, Sushma V. (1998). "Chromospheric activity in cool stars and the lithium abundance". Astronomy and Astrophysics. 338: 623–636. Bibcode:1998A&A...338..623M.

[gcsrv-3] Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953QB901.W495.....

[assl350-4] van Leeuwen, Floor (2007). Hipparcos, the new Reduction of the Raw data. Astrophysics and Space Science Library. 350. Bibcode:2007A&A...474..653V. ISBN 9781402063411. Note: see VizieR catalogue I/311.

[apjss168-5] Takeda, G. (2007). "Stellar parameters of nearby cool stars. II. Physical properties of ~1000 cool stars from the SPOCS catalog". Astrophysical Journal Supplement Series. 168: 297–318. Bibcode:2008yCat..21680297T. Note: see VizieR catalogue J/ApJS/168/297.

[apj687-6] Mamajek, Eric E.; Hillenbrand, Lynne A. (2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal. 687 (2): 1264–1293. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.

[7] salah satu rasi bintang menurut bangsa Cina