Epsilon Geminorum

ε Geminorum
	; Lokasi ε Geminorum (dilingkari)
Data pengamatan; Epos J2000 Ekuinoks J2000
Rasi bintang	Gemini
Asensio rekta	06j 43m 55.92626d
Deklinasi	+25° 07′ 52.0515″
Magnitudo tampak (V)	+3,06
Ciri-ciri
Kelas spektrum	G8 Ib
Indeks warna U−B	+1,46
Indeks warna B−V	+1,40
Astrometri
Kecepatan radial (Rv)	+8.09 ± 0.14 km/s
Gerak diri (μ)	RA: –5,57 mdb/thn ; Dek.: −12,36 mdb/thn
Paralaks (π)	3,86±0,17 mdb
Jarak	840 ± 40 tc ; (260 ± 10 pc)
Magnitudo mutlak (MV)	–3,90
Detail
Massa	19,2 ± 0,1 M☉
Radius	140 ± 35 R☉
Luminositas	8.500 L☉
Gravitasi permukaan (log g)	0,88 ± 0,05
Suhu	4.662 ± 36 K
Metalisitas [Fe/H]	0,15 ± 0,07
Kecepatan rotasi (v sin i)	8,7 ± 1,0 km/s
Usia	8,3 ± 0,1 megatahun
Penamaan lain
	27 Geminorum, FK5 254, HD 48329, HIP 32246, HR 2473, SAO 78682.
Referensi basis data
SIMBAD	data

Epsilon Geminorum (ε Gem / ε Geminorum) adalah salah satu bintang di rasi Gemini. Posisinya berada pada "kaki" dari salah satu si kembar Castor. Bintang ini memiliki magnitudo tampak +3,06.^[2] Jarak bintang ini dari bumi adalah 913 tahun cahaya dan merupakan bintang supraraksasa kelas G8 Ib,^[3] dengan diameter 150 kali Matahari.

Etimologi

Bintang ini memiliki nama tradisional Mebsuta (kadang-kadang disebut Melboula atau Melucta). Nama ini berasal dari bahasa Arab, dimana bersama Mekbuda (Zeta Geminorum) merupakan "cakar singa" Mebsuta berasal dari kata yang berarti "cakar yang maju". Nama lainnya untuk bintang ini adalah:

nama lain	asal bahasa	arti
井宿五 / Jǐngsuwǔ	China	bintang kelima di rasi Sumur^[9]

Lokasi

Referensi

^ ^a ^b ^c ^d ^e van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752v1 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 Note: see VizieR catalogue I/311.
^ ^a ^b ^c Mallik, Sushma V. (December 1999), "Lithium abundance and mass", Astronomy and Astrophysics, 352: 495–507, Bibcode:1999A&A...352..495M
^ ^a ^b ^c Nordgren, Tyler E.; et al. (December 1999), "Stellar Angular Diameters of Late-Type Giants and Supergiants Measured with the Navy Prototype Optical Interferometer", The Astronomical Journal, 118 (6): 3032–3038, Bibcode:1999AJ....118.3032N, doi:10.1086/301114
^ ^a ^b Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
^ ^a ^b De Medeiros, J. R.; et al. (November 2002), "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars" (PDF), Astronomy and Astrophysics, 395: 97–98, Bibcode:2002A&A...395...97D, doi:10.1051/0004-6361:20021214
^ Park, Sunkyung; Kang, Wonseok; Lee, Jeong-Eun; Lee, Sang-Gak (2013). "Wilson-Bappu Effect: Extended to Surface Gravity". The Astronomical Journal. 146 (4): 73. arXiv:1307.0592 . Bibcode:2013AJ....146...73P. doi:10.1088/0004-6256/146/4/73.
^ ^a ^b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883 , Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x
^ ^a ^b ^c Wu, Yue; et al. (January 2011), "Coudé-feed stellar spectral library - atmospheric parameters", Astronomy and Astrophysics, 525: A71, arXiv:1009.1491 , Bibcode:2011A&A...525A..71W, doi:10.1051/0004-6361/201015014
^ salah satu rasi bintang menurut bangsa Cina

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

[aaa474_2_653-1] van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752v1 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 Note: see VizieR catalogue I/311.

[aaa352_495-2] Mallik, Sushma V. (December 1999), "Lithium abundance and mass", Astronomy and Astrophysics, 352: 495–507, Bibcode:1999A&A...352..495M

[aj118_6_3032-3] Nordgren, Tyler E.; et al. (December 1999), "Stellar Angular Diameters of Late-Type Giants and Supergiants Measured with the Navy Prototype Optical Interferometer", The Astronomical Journal, 118 (6): 3032–3038, Bibcode:1999AJ....118.3032N, doi:10.1086/301114

[clpl4_99-4] Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J

[aaa395_97-5] De Medeiros, J. R.; et al. (November 2002), "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars" (PDF), Astronomy and Astrophysics, 395: 97–98, Bibcode:2002A&A...395...97D, doi:10.1051/0004-6361:20021214

[park-6] Park, Sunkyung; Kang, Wonseok; Lee, Jeong-Eun; Lee, Sang-Gak (2013). "Wilson-Bappu Effect: Extended to Surface Gravity". The Astronomical Journal. 146 (4): 73. arXiv:1307.0592 . Bibcode:2013AJ....146...73P. doi:10.1088/0004-6256/146/4/73.

[mnras410_1_190-7] Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883 , Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x

[aaa525_A71-8] Wu, Yue; et al. (January 2011), "Coudé-feed stellar spectral library - atmospheric parameters", Astronomy and Astrophysics, 525: A71, arXiv:1009.1491 , Bibcode:2011A&A...525A..71W, doi:10.1051/0004-6361/201015014

[9] salah satu rasi bintang menurut bangsa Cina

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