Alpha Doradus

**Alpha Doradus**
	; Lokasi α Doradus (lingkaran)
	Data pengamatan; Epoch J2000.0 Equinox J2000.0 (ICRS)
Rasi bintang	Dorado
	Karakteristik
U-B Indeks warna	−0.35
B-V Indeks warna	−0.10
R-I Indeks warna	−0.09
	Astrometri
Gerak diri:
Paralaks (π)	19.34 ± 0.31 m.b
Jarak	169 ± 3 tc ; (51,7 ± 0,8 pc)
	Details
	Orbit
Periode (P)	12.1 y
Sumbu semi-mayor (a)	0.18″
Eksentrisitas (e)	0.80
Inklinasi (i)	31°
Bujur node menaik (Ω)	140°
Periastron epos (T)	B1986
Argumen periastron (ω); (secondary)	193°
	Referensi Database
SIMBAD	data
	Nama lain
	α Dor, Alpha Doradus, Alpha Dor, B 2092, CCDM J04340-5503AB, CD−55 916, CPD−55 663, FK5 171, GC 5600, HD 29305, HIP 21281, HR 1465, IDS 04318-5515 AB, PPM 333592, SAO 233564, WDS 04340-5503AB.

Alpha Doradus (Alpha Dor, α Doradus, α Dor) adalah bintang paling terang yang ad di rasi bintang Dorado. Dengan menggunakan sistem paralaks, jarak ke bintang ini dihitung sebesar 169 tahun cahaya (52 parsec).^[6]

Bintang ini merupakan sistem bintang biner^[8] dengan magnitudo semu bervariasi dari 3.26 - 3.30,^[4] membuatnya menjadi bintang biner yang paling terang.^[10]

Referensi

^ ^a ^b ^c HIP 21281, record for component 1, Hipparcos catalogue; CDS ID I/239.
^ ^a ^b ^c HIP 21281, record for component 2, Hipparcos catalogue; CDS ID I/239.
^ ^a ^b ^c ^d ^e ^f ^g HR 1465, 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.
^ ^a ^b alf Dor, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 3, 2008.
^ ^a ^b V* alf Dor -- Variable Star, database entry, SIMBAD. Accessed on line September 3, 2008.
^ ^a ^b van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752  . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
^ ^a ^b ^c ^d ^e ^f North, P. (1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics, 334: 181–187, arXiv:astro-ph/9802286  , Bibcode:1998A&A...334..181N
^ ^a ^b ^c ^d ^e Kaler, James B., Stars, diakses tanggal 2012-03-04
^ "Entry 04340-5503", Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory, diakses tanggal 2008-09-03
^ Heintz, W. D. (1984), "Note on the orbit of alpha Doradus", The Observatory, 104: 88–89, Bibcode:1984Obs...104...88H

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

[viziera-1] HIP 21281, record for component 1, Hipparcos catalogue; CDS ID I/239.

[vizierb-2] HIP 21281, record for component 2, Hipparcos catalogue; CDS ID I/239.

[bsc2-3] ^ ^a ^b ^c ^d ^e ^f ^g HR 1465, 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.

[gcvs1-4] Dor, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 3, 2008.

[sb0-5] V* alf Dor -- Variable Star, database entry, SIMBAD. Accessed on line September 3, 2008.

[aaa474_2_653-6] van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752  . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.

[aaa334_181-7] ^ ^a ^b ^c ^d ^e ^f North, P. (1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics, 334: 181–187, arXiv:astro-ph/9802286  , Bibcode:1998A&A...334..181N

[kaler-8] Kaler, James B., Stars, diakses tanggal 2012-03-04

[orb-9] "Entry 04340-5503", Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory, diakses tanggal 2008-09-03

[ob104_88-10] Heintz, W. D. (1984), "Note on the orbit of alpha Doradus", The Observatory, 104: 88–89, Bibcode:1984Obs...104...88H

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Lokasi α Doradus (lingkaran)
Data pengamatan Epoch J2000.0 Equinox J2000.0 (ICRS)
Rasi bintang	Dorado
Komponen	A	B
Asensio rekta	04^j 33^m	04^j 33^m
	59.778^s	59.782^s
Deklinasi	−55° 02′^[1]	−55° 02′^[2]
	41.91″	42.39″
Magnitudo semu (V)	3.8^[3]	4.3^[3]
Karakteristik
Klasifikasi bintang	A0IIIp^[3]	B9IV^[3]
U-B Indeks warna	−0.35^[3]
B-V Indeks warna	−0.10^[3]
R-I Indeks warna	−0.09^[3]
Variable type	ACV^[4]
Astrometri
Kecepatan radial (R_v)	25.6 ± 0.9^[5] km/s
Gerak diri:
RA (μ_α cos δ)	58.06^[1] m.b/thn	42.83^[2] m.b/thn
Dec. (μ_δ)	12.73^[1]&nbspm.b/thn	12.94^[2]&nbspm.b/thn
Paralaks (π)	19.34 ± 0.31^[6] m.b
Jarak	169 ± 3 tc (51,7 ± 0,8 pc)
Details
Massa	3.33 ± 0.10^[7] M_☉	2.7^[8] M_☉
Radius	3.5 ± 0.3^[7] R_☉	1.9^[8] R_☉
Gravitasi permukaan (log g)	4.02 ± 0.07^[7]
Luminositas (bolometriks)	195^[7] L_☉	70^[8] L_☉
Temperatur	11,588^[7] K	12,200^[8] K
Rotasi	2.94 days^[7]
Orbit^[9]
Periode (P)	12.1 y
Sumbu semi-mayor (a)	0.18″
Eksentrisitas (e)	0.80
Inklinasi (i)	31°
Bujur node menaik (Ω)	140°
Periastron epos (T)	B1986
Argumen periastron (ω) (secondary)	193°
Referensi Database
SIMBAD	data
Nama lain
α Dor, Alpha Doradus, Alpha Dor, B 2092, CCDM J04340-5503AB, CD−55 916, CPD−55 663, FK5 171, GC 5600, HD 29305, HIP 21281, HR 1465, IDS 04318-5515 AB, PPM 333592, SAO 233564, WDS 04340-5503AB.^[5]