Alpha Doradus: Perbedaan antara revisi
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{{Starbox 2 |
{{Starbox 2 |
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|name = Alpha Doradus |
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|image = <div style="position: relative">[[Berkas:Dorado IAU.svg|250px]] |
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<div style="position: absolute; left: 56.6%; top: 31.5%;">[[Berkas:Cercle rouge 100%.svg|12px]]</div> |
<div style="position: absolute; left: 56.6%; top: 31.5%;">[[Berkas:Cercle rouge 100%.svg|12px]]</div> |
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</div> |
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|caption = Lokasi α Doradus (lingkaran) |
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|epoch = [[J2000.0]] |
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|equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]]) |
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|constell = [[Dorado]] |
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|component_a = A |
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|component_b = B |
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|ra_a_h = 04 |
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|ra_a_m = 33 |
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|ra_a_s = 59.778 |
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|dec_a_d = −55 |
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|dec_a_m = 02 |
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|dec_a_s = 41.91 |
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|radec_a_footnote = <ref name=viziera/> |
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|ra_b_h = 04 |
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|ra_b_m = 33 |
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|ra_b_s = 59.782 |
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|dec_b_d = −55 |
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|dec_b_m = 02 |
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|dec_b_s = 42.39 |
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|radec_b_footnote = <ref name=vizierb/> |
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|appmag_v_a=3.8<ref name=bsc2 /> |
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|appmag_v_b=4.3<ref name=bsc2 /> |
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|class_a = A0IIIp<ref name=bsc2 /> |
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|class_b = B9IV<ref name=bsc2 /> |
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|u-b_system = −0.35<ref name=bsc2/> |
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|b-v_system = −0.10<ref name=bsc2 /> |
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|r-i_system = −0.09<ref name=bsc2 /> |
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|variable_a = [[Alpha² Canum Venaticorum variable|ACV]]<ref name=gcvs1 /> |
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|radial_v_a = {{nowrap|25.6 ± 0.9}}<ref name=sb0 /> |
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|prop_mo_ra_a = 58.06<ref name=viziera /> |
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|prop_mo_dec_a = 12.73<ref name=viziera /> |
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|prop_mo_ra_b = 42.83<ref name=vizierb /> |
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|prop_mo_dec_b = 12.94<ref name=vizierb /> |
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|parallax = 19.34 |
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|p_error = 0.31 |
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|parallax_footnote = <ref name=aaa474_2_653/> |
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|absmag_v=–0.38 <small>(dikombinasikan)</small><ref>Dari magnitudo semu dan paralaks.</ref> |
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|mass_a={{nowrap|3.33 ± 0.10}}<ref name=aaa334_181/> |
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|mass_b=2.7<ref name=kaler /> |
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|luminosity_bolometric_a=195<ref name=aaa334_181/> |
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|luminosity_bolometric_b=70<ref name=kaler /> |
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|gravity_a={{nowrap|4.02 ± 0.07}}<ref name=aaa334_181/> |
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|radius_a={{nowrap|3.5 ± 0.3}}<ref name=aaa334_181/> |
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|radius_b=1.9<ref name=kaler /> |
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|temperature_a=11,588<ref name=aaa334_181/> |
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|temperature_b=12,200<ref name=kaler /> |
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|rotation_a=2.94 days<ref name=aaa334_181/> |
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|orbit_footnote=<ref name=orb/> |
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|period_unitless=12.1 y |
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|axis_unitless=0.18[[arcsecond|″]] |
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|periastron=[[Epoch (astronomy)|B]]1986 |
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|inclination=31 |
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|node=140 |
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|eccentricity=0.80 |
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|periarg=193 |
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|names=α Dor, Alpha Doradus, Alpha Dor, [[Double star designation|B 2092]], [[Catalog of Components of Double and Multiple Stars|CCDM]] J04340-5503AB, [[Durchmusterung|CD]]−55 916, [[Durchmusterung|CPD]]−55 663, [[Fifth Fundamental Catalogue|FK5]] 171, [[Boss General Catalogue|GC]] 5600, [[Henry Draper Catalogue|HD]] 29305, [[Hipparcos Catalogue|HIP]] 21281, [[Bright Star Catalogue|HR]] 1465, [[Index Catalogue of Visual Double Stars|IDS]] 04318-5515 AB, [[PPM Star Catalogue|PPM]] 333592, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 233564, [[Washington Double Star Catalog|WDS]] 04340-5503AB.<ref name=sb0 /> |
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|simbad_system=alp+dor}} |
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'''Alpha Doradus''' ('''Alpha Dor''', '''α Doradus''', '''α Dor''') adalah bintang paling terang yang ad di [[rasi bintang]] [[Dorado]]. Dengan |
'''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 {{Convert|169|ly|pc|abbr=off|lk=on}}.<ref name=aaa474_2_653/> |
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==Referensi== |
==Referensi== |
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{{Reflist|refs= |
{{Reflist|refs= |
Revisi per 6 Juli 2013 13.43
Data pengamatan Epoch J2000.0 Equinox J2000.0 (ICRS) | ||
Rasi bintang | Dorado | |
Komponen | A | B |
Asensio rekta | 04j 33m | 04j 33m |
59.778s | 59.782s | |
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 (Rv) | 25.6 ± 0.9[5] km/s | |
Gerak diri: | ||
RA (μα cos δ) | 58.06[1] m.b/thn | 42.83[2] m.b/thn |
Dec. (μδ) | 12.73[1] m.b/thn | 12.94[2] m.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 | ||
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 sistim 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