Alpha Comae Berenices: Perbedaan antara revisi
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| ra = {{RA|13|09|59.2766}}<ref name=sb0>{{SIMBAD link|alf+com|NSV 6116 -- Variable Star}}, database entry, [[SIMBAD]]. Accessed on line [[September 3]], [[2008]].</ref> |
| ra = {{RA|13|09|59.2766}}<ref name=sb0>{{SIMBAD link|alf+com|NSV 6116 -- Variable Star}}, database entry, [[SIMBAD]]. Accessed on line [[September 3]], [[2008]].</ref> |
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| dec = {{DEC|+17|31|45.953}}<ref name=sb0 /> |
| dec = {{DEC|+17|31|45.953}}<ref name=sb0 /> |
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| appmag_v=4.29 to 4.35<br /><small>(combined)</small><ref name=nsv1>NSV 6116, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/nsv/nsv.dat New Catalogue of Suspected Variable Stars, the improved version], Sternberg Astronomical Institute, Moscow, Russia. Accessed on line [[September 3]], [[2008]].</ref><br />A: 4.85 / B: 5.53 |
| appmag_v=4.29 to 4.35<br /><small>(combined)</small><ref name=nsv1>NSV 6116, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/nsv/nsv.dat New Catalogue of Suspected Variable Stars, the improved version], Sternberg Astronomical Institute, Moscow, Russia. Accessed on line [[September 3]], [[2008]].</ref><br />A: 4.85 / B: 5.53 |
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|reference= |
|reference=Entry 13100+1732, |
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[http://ad.usno.navy.mil/wds/orb6/orb6orbits.txt Sixth Catalog of Orbits of Visual Binary Stars], |
[http://ad.usno.navy.mil/wds/orb6/orb6orbits.txt Sixth Catalog of Orbits of Visual Binary Stars], |
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[[United States Naval Observatory]]. Accessed on line [[September 3]], [[2008]].</ref> |
[[United States Naval Observatory]]. Accessed on line [[September 3]], [[2008]].</ref> |
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Revisi per 11 Agustus 2009 04.14
| Data pengamatan Epos J2000.0 Ekuinoks J2000.0 (ICRS) | |
|---|---|
| Rasi bintang | Coma Berenices |
| Asensio rekta | 13j 09m 59.2766d[1] |
| Deklinasi | +17° 31′ 45.953″[1] |
| Magnitudo tampak (V) | 4.29 to 4.35 (combined)[2] A: 4.85 / B: 5.53 |
| Ciri-ciri | |
| Kelas spektrum | A: F5V / B: F5V (binary star)[3] |
| Indeks warna U−B | −0.06[4] |
| Indeks warna B−V | 0.45[4] |
| Indeks warna V−R | 0.2[1] |
| Indeks warna R−I | 0.2[1] |
| Astrometri | |
| Kecepatan radial (Rv) | −17.7 ± 0.9[1] km/s |
| Gerak diri (μ) | RA: −445.96[1] mdb/thn Dek.: 129.69[1] mdb/thn |
| Paralaks (π) | 51,7±5,7[5] mdb |
| Jarak | sekitar 63 tc (sekitar 19 pc) |
| Magnitudo mutlak (MV) | 3 (combined)[6] |
| Orbit bintang ganda visual | |
| Bintang sekunder | {{{name}}} |
| Periode (P) | {{{period}}} tahun |
| Sumbu semi-mayor (a) | {{{axis}}}" |
| Eksentrisitas (e) | 0.5083 ± 0.0026 |
| Inklinasi (i) | 90.098 ± 0.051° |
| Bujur node (Ω) | 192.235 ± 0.047° |
| Epoch periastron (T) | B1989.2052 ± 0.0061 |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | data |
Alpha Comae Berenices (Alpha Com / α Com / α Comae Berenices) adalah salah satu bintang di rasi Coma Berenices (Rambut Berenice, Berenice's Hair). Meskipun ditetapkan sebagai "alpha", dengan magnitudo 4.32, bintang ini lebih redup dibandingkan dengan Beta Comae Berenices.
Bintang ini merupakan bintang ganda, dengan magnitudo komponennya sebesar 5.05 dan 5.08, mengorbit selama 25.87 tahun dan terpisah 0.7 arcsecond. Bintang ini berada pada jarak 47 tahun cahaya dari Bumi.
Etimologi
Bintang ini memiliki nama tradisional Diadem yang merepresentasikan mahkota Ratu Berenice II dari Mesir. Nama lain dari para astronom terdahulu adalah :
| nama lain | asal bahasa | arti |
|---|---|---|
| Al Dafirah | Arab | mahkota |
| 太微左垣五,次相 / Tàiwēizuǒyuánwǔ, Cìxiāng | Cina | bintang kelima pada rasiDinding di Kiri[9], Jenderal Pertama di Timur |
| 东上将 / Dōngshǎngjiāng | Cina | Raja penuntun di Timur[1] |
| 太左五 / Tàizuǒwǔ | Cina | Yang agung kelima di kiri[1] |
Komponen visual
| Data pengamatan Epos J2000.0 Ekuinoks J2000.0 (ICRS) | |
|---|---|
| Rasi bintang | Coma Berenices |
| Asensio rekta | 13j 10m 00.4d[10] |
| Deklinasi | +17° 31′ 48″[10] |
| Magnitudo tampak (V) | 10.2[10] |
| Posisi (relatif ke α Comae Berenices AB) | |
| Epoch pengamatan | 1998 |
| Jarak sudut | 88.7″ [11] |
| Sudut posisi | 345° [11] |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | data |
Bintang ini memiliki komponen visual, CCDM J13100+1732C, yang bermagnitudo 10.2, berlokasi terpisah di jarak 89 arcsecond.[10][11]
Referensi
- ^ a b c d e f g h i j NSV 6116 -- Variable Star, database entry, SIMBAD. Accessed on line September 3, 2008. Kesalahan pengutipan: Tanda
<ref>tidak sah; nama "sb0" didefinisikan berulang dengan isi berbeda - ^ NSV 6116, database entry, New Catalogue of Suspected Variable Stars, the improved version, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 3, 2008.
- ^ Diadem, Jim Kaler, Stars. Accessed on line September 3, 2008.
- ^ a b HR 4968, 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 September 3, 2008.
- ^ GJ 501, database entry, Preliminary Version of the Third Catalogue of Nearby Stars, W. Gliese and H. Jahreiss, CDS ID V/70A. Accessed on line September 3, 2008.
- ^ From apparent magnitude and parallax.
- ^ HD 114378 -- Star in double system, database entry, SIMBAD, accessed on line September 3, 2008.
- ^ HD 114379 -- Star in double system, database entry, SIMBAD, accessed on line September 3, 2008.
- ^ salah satu rasi bintang menurut bangsa Cina
- ^ a b c d e BD+18 2697C -- Star in double system, database entry, SIMBAD. Accessed on line September 3, 2008.
- ^ a b c d Entry 13100+1732, discoverer code STF1728, components AB-C, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line September 3, 2008.