Delta Cassiopeiae

δ Cassiopeiae
	; Lokasi δ Cassiopeiae (dilingkari)
Data pengamatan; Epos J2000 Ekuinoks J2000
Rasi bintang	Cassiopeia
Asensio rekta	01j 25m 48,95147d
Deklinasi	+60° 14′ 07,0225″
Magnitudo tampak (V)	2,68
Ciri-ciri
Kelas spektrum	A5 IV
Indeks warna U−B	+0,13
Indeks warna B−V	+0,13
Jenis variabel	Algol
Astrometri
Kecepatan radial (Rv)	−6,7 km/s
Gerak diri (μ)	RA: 296,57 mdb/thn ; Dek.: –49,22 mdb/thn
Paralaks (π)	32,81±0,14 mdb
Jarak	99,4 ± 0,4 tc ; (30,5 ± 0,1 pc)
Magnitudo mutlak (MV)	+0,28
Detail
Massa	2,49 M☉
Radius	3,90 R☉
Luminositas	72,88 L☉
Suhu	7.980 K
Kecepatan rotasi (v sin i)	123 km/s
Usia	6,0×108 tahun
Penamaan lain
	Ruchbah, Ksora, Rucba, Rucbar, 37 Cassiopeiae, BD+59°248, FK5 48, HD 8538, HIP 6686, HR 403, SAO 22268, WDS J01258+6014A.
Referensi basis data
SIMBAD	data

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

^ ^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:0708.1752v1  , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 Note: see VizieR catalogue I/311.
^ ^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
^ 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.
^ 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
^ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Washington, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W
^ 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.
^ ^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:1201.2052  . Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.
^ ^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/0609555  , Bibcode:2007ApJ...660.1556R, doi:10.1086/509912
^ Bakich, Michael E. (1995), The Cambridge guide to the constellations, Cambridge University Press, hlm. 170, ISBN 0-521-44921-9
^ Allen, Richard Hinckley (1899), Star-names and their meanings, G.E. Stechert, hlm. 148
^ "V* del Cas -- Variable Star", SIMBAD, Centre de Données astronomiques de Strasbourg, diakses tanggal 2010-02-21
^ salah satu rasi bintang menurut bangsa Cina
^ http://www.chinese-tools.com/tools/sinograms.html
^ http://www.atlascoelestis.com/alsufi%2010.htm

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

[aaa474_2_653-1] ^ ^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:0708.1752v1  , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 Note: see VizieR catalogue I/311.

[clpl4_99-2] 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

[gray-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.

[aaa446_2_785-4] 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

[wilson1953-5] Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Washington, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W

[Eggen1998-6] 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.

[zorec-7] Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052  . Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.

[apj660_2_1556-8] 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/0609555  , Bibcode:2007ApJ...660.1556R, doi:10.1086/509912

[bakich1995-9] Bakich, Michael E. (1995), The Cambridge guide to the constellations, Cambridge University Press, hlm. 170, ISBN 0-521-44921-9

[hinkley1899-10] Allen, Richard Hinckley (1899), Star-names and their meanings, G.E. Stechert, hlm. 148

[SIMBAD-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] ttp://www.chinese-tools.com/tools/sinograms.html

[14] ttp://www.atlascoelestis.com/alsufi%2010.htm

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Data pengamatan Epos J2000 Ekuinoks J2000
Lokasi δ Cassiopeiae (dilingkari)
Rasi bintang	Cassiopeia
Asensio rekta	01^j 25^m 48,95147^d^[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 (R_v)	−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
Jarak	99,4 ± 0,4 tc (30,5 ± 0,1 pc)
Magnitudo mutlak (M_V)	+0,28^[6]

Detail

Massa	2,49^[7] M_☉
Radius	3,90^[8] R_☉
Luminositas	72,88^[7] L_☉
Suhu	7.980^[7] K
Kecepatan rotasi (v sin i)	123^[7] km/s
Usia	6,0×10⁸^[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
SIMBAD	data