Alpha Equulei: Perbedaan antara revisi
Konten dihapus Konten ditambahkan
k bot Menambah: ja:キタルファ |
k →Pranala luar: clean up |
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| (18 revisi perantara oleh 14 pengguna tidak ditampilkan) | |||
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{{Starbox
}}
epoch=[[J2000.0]] |▼
{{Starbox image
constell=[[Equuleus (constellation)|Equuleus]] |▼
| image=
{{Location mark
|image=Equuleus constellation map.svg|alt=|float=center|width=250
|label=|position=right
|mark=Red circle.svg|mark_width=12|mark_link=α Equ
|x=449|y=701
}}
dist_pc=57.05 |▼
|caption=Lokasi α Equulei (dilingkari)
names=Kitalphar, 8 Equulei, [[Bright Star Catalogue|HR]] 8131, [[Henry Draper Catalogue|HD]] 202447, [[Bonner Durchmusterung|BD]] +04 4635, [[Hipparcos catalogue|HIP]] 104987, [[Smithsonian Astrophysical Observatory Star Catalogue|SAO]] 126662, FK5 800, GC 29735}}▼
}}
'''Alpha Equulei''' (α Equ / α Equulei) adalah salah satu bintang di rasi [[Equuleus]] dan merupakan bintang tercerah di rasi ini. Alpha Equulei termasuk bintang dengan kelas G0III dan ber[[magnitudo]] +3.92, serta memiliki kecemerlangan 75 kali [[Matahari]]. ▼
{{Starbox observe
| ra = {{RA|21|15|49.43192}}<ref name="van Leeuwen2007"/>
| dec = {{DEC|+5|14|52.2430}}<ref name="van Leeuwen2007"/>
| appmag_v = +3,919<ref name=cousins>{{cite journal|bibcode=1984SAAOC...8...59C|title=Standardization of Broadband Photometry of Equatorial Standards|journal=South African Astronomical Observatory Circulars|volume=8|pages=59|author1=Cousins|first1=A. W. J.|year=1984}}</ref>
}}
{{Starbox character
| class = G7III + kA3hA4mA9<ref name=griffin/>
| b-v = +0,529<ref name=cousins/>
| u-b = +0,284<ref name=cousins/>
| variable=
}}
{{Starbox astrometry
| radial_v = −15,71 ± 0,05<ref name=griffin/>
| prop_mo_ra = {{nowrap|+59,88 ± 0,23<ref name="van Leeuwen2007"/>}}
| prop_mo_dec = {{nowrap|−94,09 ± 0,18<ref name="van Leeuwen2007"/>}}
| parallax = 17.14
| p_error = 0.21
| parallax_footnote =<ref name="van Leeuwen2007">{{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 }}[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=117056 Vizier catalog entry ]</ref>
| absmag_v = +0,17 (0,71 + 1,18)<ref name=griffin/>
}}
{{Starbox orbit
| reference =<ref name=griffin>{{cite journal|bibcode=2002MNRAS.330..288G|title=Composite spectra Paper 11: α Equulei, an astrometric binary with an Am secondary|journal=Monthly Notices of the Royal Astronomical Society|volume=330|issue=2|pages=288|author1=Griffin|first1=R. E. M.|last2=Griffin|first2=R. F.|year=2002|doi=10.1046/j.1365-8711.2002.05030.x}}</ref>
| period_unitless = 98,8098 hari
| eccentricity = 0
| k1 = 16,34 ± 0,07
| k2 = 17,9 ± 0,3
}}
{{Starbox detail
| component1 = A
| mass = 2,3<ref name=griffin/>
| radius = 9,2<ref name=griffin/>
| luminosity = 52,5<ref name=griffin/>
| temperature = 5.100<ref name=griffin/>
| metal_fe =
| gravity =
| rotational_velocity = 20,0<ref name=aaa361_614/>
| component2 = B
| mass2 = 2,0<ref name=griffin/>
| radius2 = 2,6<ref name=griffin/>
| luminosity2 = 26,3<ref name=griffin/>
| temperature2 = 8.150<ref name=griffin/>
| age_myr2 =740<ref name=griffin/>
}}
{{Starbox catalog
▲
}}
{{Starbox reference
| Simbad = Alpha+Equulei
}}
{{Starbox end}}
▲'''Alpha Equulei''' (α Equ / α Equulei) adalah salah satu bintang di rasi [[Equuleus]] dan merupakan bintang tercerah di rasi ini.
Alpha Equulei merupakan [[bintang ganda]] yang unik. Komponen yang berada pada bintang ini memiliki kelas G + A. Komponen yang lebih terang memiliki kecemerlangan 45 kali [[Matahari]] dan termasuk bintang raksasa kelas G (G0). Sedangkan komponen yang lebih redup adalah [[bintang katai]] tipe A kelas A5 (''white class A, classA5 dwarf''). Bintang raksasanya berada tahapan bintang mati. Suhunya diperkirakan 5500 sampai 8500 [[Kelvin]]. Bintang ini berada pada jarak 186 [[tahun cahaya]] dari [[Bumi]].
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== Etimologi ==
Bintang ini sering disebut dengan nama tradisionalnya, yaitu '''Kitalpha''' (karang-karang ''Kitel Phard'' atau ''Kitalphar),''yang berasal dari
{| class="wikitable"
Baris 26 ⟶ 80:
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|虚宿二 / Xūsùèr||[[China]] ||bintang kedua pada rasi [[Daftar asterisme di Kehampaan#Kehampaan|Kehampaan]]<ref name=sb0>salah satu rasi bintang menurut bangsa Cina</ref>
|-
| Heu || [[China]] ||kehampaan<ref>http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Aquarius*.html</ref>
|}
== Referensi ==
* {{cite web | title=HD 202447 -- Spectroscopic binary | work=SIMBAD Astronomical Database | url=http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=alpha+equulei&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2005&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=2000.0&Equi2=1950.0&Equi3=2000.0&Epoch1=2000.0&Epoch2=1950.0&Epoch3=2000.0 | accessdate=2007-01-22}}
* [http://www.astro.uiuc.edu/~kaler/sow/kitalpha.html Kaler: Kitalpha] {{Webarchive|url=https://web.archive.org/web/20080704134236/http://www.astro.uiuc.edu/~kaler/sow/kitalpha.html |date=2008-07-04 }}
{{reflist
<ref name=aaa361_614>{{citation | last1=Pizzolato | first1=N. | last2=Maggio | first2=A. | last3=Sciortino | first3=S. | title=Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases | journal=Astronomy and Astrophysics | volume=361 | pages=614–628 |date=September 2000 | bibcode=2000A&A...361..614P }}</ref>
}}
== Pranala luar ==
* [http://www.alcyone.de/SIT/bsc/ Yale Bright Star Catalog; click on Equuleus]
{{astronomi-stub}}▼
[[Kategori:Rasi bintang Equuleus]]
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