Delta Cassiopeiae

δ Cassiopeiae

Lokasi δ Cassiopeiae (dilingkari)
Data pengamatan
Epos J2000      Ekuinoks J2000
Rasi bintang Cassiopeia
Asensio rekta  01j 25m 48,95147d[1]
Deklinasi  +60° 14′ 07,0225″[1]
Magnitudo tampak (V) 2,68[2]
Ciri-ciri
Kelas spektrum A5 IV[3]
Indeks warna U−B +0,13[2]
Indeks warna B−V +0,13[2]
Jenis variabel Algol[4]
Astrometri
Kecepatan radial (Rv)−6,7[5] km/s
Gerak diri (μ) RA: 296,57[1] mdb/thn
Dek.: –49,22[1] mdb/thn
Paralaks (π)32,81±0,14[1] mdb
Jarak99,4 ± 0,4 tc
(30,5 ± 0,1 pc)
Magnitudo mutlak (MV)+0,28[6]
Detail
Massa2,49[7] M
Radius3,90[8] R
Luminositas72,88[7] L
Suhu7.980[7] K
Kecepatan rotasi (v sin i)123[7] km/s
Usia6,0×108[8] tahun
Penamaan lain
Ruchbah, Ksora,[9] Rucba, Rucbar,[10] 37 Cassiopeiae, BD+59°248, FK5 48, HD 8538, HIP 6686, HR 403, SAO 22268, WDS J01258+6014A.[11]
Referensi basis data
SIMBADdata

Delta Cassiopeiae (δ Cas / δ Cassiopeiae) adalah salah satu bintang di rasi Cassiopeia. Delta Cassiopeiae merupakan bintang ganda dengan periode orbit 759 hari. Bintang ini memiliki magnitudo tampak sekitar 2,68.[2] Delta Cassiopeia berada pada jarak 99,4 tahun cahaya (30,5 parsec) dari Bumi.[1]

Etimologi

Ruchbah adalah nama tradisional dari bintang ini, berasal dari bahasa Arabركبة rukbah yang berarti "lutut", merefleksikan posisi bintang ini pada lutut sang ratu. Kadang-kadang bintang ini disebut juga dengan nama Ksora. Nama lain dari para astronom terdahulu adalah:

nama lain asal bahasa arti
閣道三 / Gédàosān China bintang ketiga pada rasi Lorong Terbang[12]
奎西南大星 / Gédàonándàxīng China bintang besar di selatan rasi Lorong Terbang[13]
Quae in genibus (Almagest) Latin yang berada di lutut (sang ratu)[14]

Selain rasi Cassiopeia, bintang ini juga merupakan anggota dari berbagai rasi atau asterisma berikut:

nama rasi / asterisma asal arti anggota lainnya
閣道 China Lorong Terbang ι Cas, ε Cas, θ Cas, ν Cas, ο Cas,
W huruf W β Cas, α Cas, γ Cas, ε Cas
The Sun would appear close to Cassiopeia from Alpha Centauri

Referensi

  1. ^ a b c d e f van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752v1alt=Dapat diakses gratis, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357  Note: see VizieR catalogue I/311.
  2. ^ a b c d 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 
  3. ^ Gray, R. O.; Garrison, R. F. (1989). "The late A-type stars - Refined MK classification, confrontation with Stromgren photometry, and the effects of rotation". Astrophysical Journal Supplement Series. 70: 623. Bibcode:1989ApJS...70..623G. doi:10.1086/191349. 
  4. ^ Malkov, O. Yu.; et al. (February 2006), "A catalogue of eclipsing variables", Astronomy and Astrophysics, 446 (2): 785–789, Bibcode:2006A&A...446..785M, doi:10.1051/0004-6361:20053137 
  5. ^ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Washington, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W 
  6. ^ Eggen, Olin J. (July 1998), "The Age Range of Hyades Stars", The Astronomical Journal, 116 (1): 284–292, Bibcode:1998AJ....116..284E, doi:10.1086/300413. 
  7. ^ a b c d Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052alt=Dapat diakses gratis. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. 
  8. ^ a b Rhee, Joseph H.; et al. (May 2007), "Characterization of Dusty Debris Disks: The IRAS and Hipparcos Catalogs", The Astrophysical Journal, 660 (2): 1556–1571, arXiv:astro-ph/0609555alt=Dapat diakses gratis, Bibcode:2007ApJ...660.1556R, doi:10.1086/509912 
  9. ^ Bakich, Michael E. (1995), The Cambridge guide to the constellations, Cambridge University Press, hlm. 170, ISBN 0-521-44921-9 
  10. ^ Allen, Richard Hinckley (1899), Star-names and their meanings, G.E. Stechert, hlm. 148 
  11. ^ "V* del Cas -- Variable Star", SIMBAD, Centre de Données astronomiques de Strasbourg, diakses tanggal 2010-02-21 
  12. ^ salah satu rasi bintang menurut bangsa Cina
  13. ^ http://www.chinese-tools.com/tools/sinograms.html
  14. ^ http://www.atlascoelestis.com/alsufi%2010.htm


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