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Baris 16: Baris 16:
|dec_a_m = 02
|dec_a_m = 02
|dec_a_s = 41.91
|dec_a_s = 41.91
|radec_a_footnote = <ref name=viziera/>
|radec_a_footnote =<ref name=viziera/>
|ra_b_h = 04
|ra_b_h = 04
|ra_b_m = 33
|ra_b_m = 33
Baris 23: Baris 23:
|dec_b_m = 02
|dec_b_m = 02
|dec_b_s = 42.39
|dec_b_s = 42.39
|radec_b_footnote = <ref name=vizierb/>
|radec_b_footnote =<ref name=vizierb/>
|appmag_v_a=3.8<ref name=bsc2 />
|appmag_v_a=3.8<ref name=bsc2 />
|appmag_v_b=4.3<ref name=bsc2 />
|appmag_v_b=4.3<ref name=bsc2 />
Baris 39: Baris 39:
|parallax = 19.34
|parallax = 19.34
|p_error = 0.31
|p_error = 0.31
|parallax_footnote = <ref name=aaa474_2_653/>
|parallax_footnote =<ref name=aaa474_2_653/>
|absmag_v=–0.38 <small>(dikombinasikan)</small><ref>Dari magnitudo semu dan paralaks.</ref>
|absmag_v=–0.38 <small>(dikombinasikan)</small><ref>Dari magnitudo semu dan paralaks.</ref>
|mass_a={{nowrap|3.33 ± 0.10}}<ref name=aaa334_181/>
|mass_a={{nowrap|3.33 ± 0.10}}<ref name=aaa334_181/>
Baris 64: Baris 64:
'''Alpha&nbsp;Doradus''' ('''Alpha&nbsp;Dor''', '''α&nbsp;Doradus''', '''α&nbsp;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/>
'''Alpha&nbsp;Doradus''' ('''Alpha&nbsp;Dor''', '''α&nbsp;Doradus''', '''α&nbsp;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/>


Bintang ini merupakan sistim [[bintang biner]]<ref name=kaler /> dengan [[magnitudo semu]] bervariasi dari 3.26 - 3.30,<ref name=gcvs1/> membuatnya menjadi bintang biner yang paling terang.<ref name=ob104_88/>
Bintang ini merupakan sistem [[bintang biner]]<ref name=kaler /> dengan [[magnitudo semu]] bervariasi dari 3.26 - 3.30,<ref name=gcvs1/> membuatnya menjadi bintang biner yang paling terang.<ref name=ob104_88/>


==Referensi==
== Referensi ==
{{Reflist|refs=
{{Reflist|refs=


Baris 81: Baris 81:
<ref name=orb>{{citation | title=Entry 04340-5503 | url=http://ad.usno.navy.mil/wds/orb6/orb6orbits.txt | work=Sixth Catalog of Orbits of Visual Binary Stars | publisher=[[United States Naval Observatory]] | accessdate=2008-09-03 }}</ref>
<ref name=orb>{{citation | title=Entry 04340-5503 | url=http://ad.usno.navy.mil/wds/orb6/orb6orbits.txt | work=Sixth Catalog of Orbits of Visual Binary Stars | publisher=[[United States Naval Observatory]] | accessdate=2008-09-03 }}</ref>


<ref name=kaler>{{citation | url=http://stars.astro.illinois.edu/sow/alphador.html | title=Alpha Dor | first1=James B. | last1=Kaler | title=Stars'' | accessdate=2012-03-04 }}</ref>
<ref name=kaler>{{citation | url=http://stars.astro.illinois.edu/sow/alphador.html | title=Alpha Dor | first1=James B. | last1=Kaler | title=Stars'' | accessdate=2012-03-04 }}</ref>


<ref name=gcvs1>alf Dor, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat 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.</ref>
<ref name=gcvs1>alf Dor, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars] {{Webarchive|url=https://web.archive.org/web/20170620004609/http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat |date=2017-06-20 }}, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 3, 2008.</ref>
<!--
<!--
<ref name=wds>{{citation | title=Entry 04340-5503, discoverer code HJ3668, components AB-C | url=http://ad.usno.navy.mil/wds/wdsnewframe1.html | work=The Washington Double Star Catalog | publisher=[[United States Naval Observatory]] | accessdate=2008-09-03 }}</ref>
<ref name=wds>{{citation | title=Entry 04340-5503, discoverer code HJ3668, components AB-C | url=http://ad.usno.navy.mil/wds/wdsnewframe1.html | work=The Washington Double Star Catalog | publisher=[[United States Naval Observatory]] | accessdate=2008-09-03 }}</ref>
Baris 90: Baris 90:


<ref name=aaa334_181>{{citation | last1=North | first1=P. | title=Do SI stars undergo any rotational braking? | journal=Astronomy and Astrophysics | volume=334 | pages=181–187 | month=June | year=1998 | bibcode=1998A&A...334..181N |arxiv = astro-ph/9802286 }}</ref>
<ref name=aaa334_181>{{citation | last1=North | first1=P. | title=Do SI stars undergo any rotational braking? | journal=Astronomy and Astrophysics | volume=334 | pages=181–187 | month=June | year=1998 | bibcode=1998A&A...334..181N |arxiv = astro-ph/9802286 }}</ref>

}}
}}


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[[Kategori:Astronomi]]
[[Kategori:Astronomi]]

{{Astronomi-stub}}

Revisi terkini sejak 9 Januari 2023 09.56

Alpha Doradus

Lokasi α Doradus (lingkaran)
Data pengamatan
Epoch J2000.0      Equinox J2000.0 (ICRS)
Rasi bintangDorado
KomponenAB
Asensio rekta 04j 33m 04j 33m
 59.778s59.782s
Deklinasi −55° 02′[1] −55° 02′[2]
 41.91″42.39″
Magnitudo semu (V)3.8[3]4.3[3]
Karakteristik
Klasifikasi bintangA0IIIp[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 typeACV[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]&nbspm.b/thn 12.94[2]&nbspm.b/thn 
Paralaks (π)19.34 ± 0.31[6] m.b
Jarak169 ± 3 tc
(51,7 ± 0,8 pc)
Details
Massa3.33 ± 0.10[7] M☉2.7[8] M☉
Radius3.5 ± 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☉
Temperatur11,588[7] K12,200[8] K
Rotasi2.94 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
SIMBADdata
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]

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[sunting | sunting sumber]

  1. ^ a b c HIP 21281, record for component 1, Hipparcos catalogue; CDS ID I/239.
  2. ^ a b c HIP 21281, record for component 2, Hipparcos catalogue; CDS ID I/239.
  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.
  4. ^ 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 Diarsipkan 2017-06-20 di Wayback Machine., Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 3, 2008.
  5. ^ a b V* alf Dor -- Variable Star, database entry, SIMBAD. Accessed on line September 3, 2008.
  6. ^ a b van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752 alt=Dapat diakses gratis. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  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 alt=Dapat diakses gratis, Bibcode:1998A&A...334..181N 
  8. ^ a b c d e Kaler, James B., Stars, diakses tanggal 2012-03-04 
  9. ^ "Entry 04340-5503", Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory, diakses tanggal 2008-09-03 
  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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