Eta Andromedae

BD+22°153B
Data pengamatan; Epos J2000.0 Ekuinoks J2000.0 (ICRS)
Rasi bintang	Andromeda
Asensio rekta	00j 57m 04.9d
Deklinasi	+23° 23′ 43″
Magnitudo tampak (V)	11.5
Posisi (relatif ke η And)
Epoch pengamatan	1997
Jarak sudut	129.2″
Sudut posisi	232° Entry 00572+2325, discoverer code FOX 116, components AB, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line August 23, 2008.</ref>
Referensi basis data
SIMBAD	data
Penamaan lain
	FOX 116B, BD+22°153B, CCDM J00572+2325B, IDS 00519+2253 B, WDS 00572+2325B.

**η Andromedae**
	; Eta Andromeda A/B.
	Data pengamatan; Epoch J2000.0 Equinox J2000.0 (ICRS)
Rasi bintang	Andromeda
Asensio rekta	00j 57m 12.4000d
Deklinasi	+23° 25′ 03.533″
Magnitudo semu (V)	4.403
	Karakteristik
U-B Indeks warna	+0.69
B-V Indeks warna	+0.94
R-I Indeks warna	+0.48
	Astrometri
Kecepatan radial (Rv)	−10.3 ± 0.9 km/d
Gerak diri:
RA (μα cos δ)	−43.72 m.b/thn
Dec. (μδ)	−46.06 m.b/thn
Paralaks (π)	13.44 ± 0.75 m.b
Jarak	240 ± 10 tc ; (74 ± 4 pc)
	Details
Umur	8×108 tahun
	Orbit
Periode (P)	115.72 ± 0.01 d
Sumbu semi-mayor (a)	10.37 ± 0.03 mas
Eksentrisitas (e)	0.006 ± 0.002
Inklinasi (i)	30.5 ± 0.4°
Bujur node menaik (Ω)	69.4 ± 0.5°
Periastron epos (T)	48013 ± 1 MJD
Argumen periastron (ω); (secondary)	215 ± 4°
	Referensi Database
SIMBAD	data
	Nama lain
	η And, Eta Andromedae, Eta And, 38 Andromedae, 38 And, MKT 2, FOX 116A, BD+22°153, CCDM J00572+2325A, FK5 2060, GC 1136, HD 5516, HIP 4463, HR 271, IDS 00519+2253 A, PPM 90327, SAO 74388, WDS 00572+2325A/Aa. Entry 00572+2325, discoverer code MKT 2, components Aa, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line August 27, 2008.</ref>

Eta Andromedae (Eta And / η Andromedae / η And) adalah bintang ganda yang berada di rasi Andromeda. Sistem bintang ini terdiri dari dua bintang sub raksasa tipe G (G-type subgiant)]] dengan periode orbit 115.7 hari dan magnitudo keseluruhan 4.40.^[1]^[2]

Sejarah pengamatan

Eta Andromedae ditemukan dan diamati sebagai bintang ganda pada tahun 1899 dan 1900.^[6] Its orbit was computed in 1946 from spectroscopic observations.^[7] Pada pengamatan tahun 1990 sampai 1992, Eta Andromedae diamati melalui Mark III Stellar Interferometer di Mount Wilson Observatory, California, Amerika Serikat. Hasil pengamatini ini dilaporkan pada tahun 1993.^[2]

Lokasi

Komponen visual

Bintang ini memiliki magnitudo 11.5, terpisah 129.2 arcsecond dari komponen utama.

Etimologi

Nama lain yang diberikan oleh para astronom untuk bintang ini adalah:

Nama lain	Asal bahasa	Arti
奎宿一 / Kuísuyī	China	bintang pertama pada rasi Kaki^[9]
奎宿西南小星 / Kuísuxīnánxiǎoxīng	China	bintang kecil di baratdaya rasi Kaki^[1]
Quae in cubito sinistro (Almagest)	Latin	yang berada di siku kiri (sang perawan yang dirantai) ^[10]

Referensi

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j HD 5516 -- Spectroscopic binary, database entry, SIMBAD. Accessed on line August 23, 2008. Kesalahan pengutipan: Tanda <ref> tidak sah; nama "sb0" didefinisikan berulang dengan isi berbeda
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m The spectroscopic binary eta Andromedae: Determination of the orbit by optical interferometry, C. A. Hummel et al., Astronomical Journal 106, #6 (December 1993), pp. 2486–2492, Bibcode: 1993AJ....106.2486H, DOI:10.1086/116816.
^ ^a ^b ^c HR 271, 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 August 23, 2008.
^ ^a ^b Table 2, Resolved double-lined spectroscopic binaries: A neglected source of hypothesis-free parallaxes and stellar masses, D. Pourbaix, Astronomy and Astrophysics Supplement 145 (August 2000), pp. 215–222, Bibcode: 2000A&AS..145..215P.
^ Entry 00572+2325, Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory. Accessed on line August 27, 2008.
^ A list of nine stars whose velocities in the line of sight are variable, W. W. Campbell and W. H. Wright, Astrophysical Journal 12 (November 1900), pp. 254–257, Bibcode: 1900ApJ....12..254C, DOI:10.1086/140765.
^ The Spectroscopic Binary η Andromedae, Katherine C. Gordon, Astrophysical Journal 103 (January 1946), pp. 13–15, Bibcode: 1946ApJ...103...13G.
^ ^a ^b ^c ^d BD+22 153B -- Star in double system, database entry, SIMBAD. Accessed on line August 22, 2008.
^ salah satu rasi bintang menurut bangsa Cina
^ http://www.atlascoelestis.com/alsufi%2020.htm

Pranala luar

η Andromedae Diarsipkan 2009-08-27 di Wayback Machine. at Alycone Software's Star Data Pages
Image η Andromedae

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

[sb0-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j HD 5516 -- Spectroscopic binary, database entry, SIMBAD. Accessed on line August 23, 2008. Kesalahan pengutipan: Tanda <ref> tidak sah; nama "sb0" didefinisikan berulang dengan isi berbeda

[intf-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m The spectroscopic binary eta Andromedae: Determination of the orbit by optical interferometry, C. A. Hummel et al., Astronomical Journal 106, #6 (December 1993), pp. 2486–2492, Bibcode: 1993AJ....106.2486H, DOI:10.1086/116816.

[bsc1-3] HR 271, 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 August 23, 2008.

[pbx2000-4] Table 2, Resolved double-lined spectroscopic binaries: A neglected source of hypothesis-free parallaxes and stellar masses, D. Pourbaix, Astronomy and Astrophysics Supplement 145 (August 2000), pp. 215–222, Bibcode: 2000A&AS..145..215P.

[5] Entry 00572+2325, Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory. Accessed on line August 27, 2008.

[6] A list of nine stars whose velocities in the line of sight are variable, W. W. Campbell and W. H. Wright, Astrophysical Journal 12 (November 1900), pp. 254–257, Bibcode: 1900ApJ....12..254C, DOI:10.1086/140765.

[7] The Spectroscopic Binary η Andromedae, Katherine C. Gordon, Astrophysical Journal 103 (January 1946), pp. 13–15, Bibcode: 1946ApJ...103...13G.

[sb1-8] BD+22 153B -- Star in double system, database entry, SIMBAD. Accessed on line August 22, 2008.

[9] salah satu rasi bintang menurut bangsa Cina

[10] ttp://www.atlascoelestis.com/alsufi%2020.htm

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Eta Andromedae

Sejarah pengamatan

Lokasi

Komponen visual

Etimologi

Referensi

Pranala luar

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