Bintang Barnard: Perbedaan antara revisi
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{{Starbox begin |
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[[Berkas:Barnardstar2006.jpg|276x276px|jmpl|ka|Lokasi Bintang Barnard.]] |
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| name = Barnard's Star |
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}} |
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{{Starbox image |
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| image = [[Image:Barnardstar2006.jpg|250px]] |
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| caption = Lokasi Bintang Barnard |
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}} |
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{{Starbox observe |
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| epoch = [[J2000.0]] |
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| constell = [[Ophiuchus]] |
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| pronounce = {{IPAc-en|ˈ|b|ɑr|n|ər|d}} |
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| ra = {{RA|17|57|48,49803}}<ref name=hipparcos>{{cite journal|bibcode=2007A&A...474..653V|title=Validation of the new Hipparcos reduction|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653|author1=Van Leeuwen|first1=F.|year=2007|doi=10.1051/0004-6361:20078357|arxiv = 0708.1752 }}</ref> |
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| dec = {{DEC|+04|41|36,2072}}<ref name=hipparcos/> |
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| appmag_v = 9,511<ref name=koen/> |
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}} |
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{{Starbox character |
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| class = M4.0V<ref name=gizis>{{cite journal|bibcode=1997AJ....113..806G|title=M-Subdwarfs: Spectroscopic Classification and the Metallicity Scale|journal=The Astronomical Journal |volume=113|pages=806|author1=Gizis|first1=John E.|year=1997|doi=10.1086/118302|arxiv = astro-ph/9611222 }}</ref> |
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| appmag_1_passband = U |
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| appmag_1 = 12,497<ref name=koen/> |
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| appmag_2_passband = B |
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| appmag_2 = 11,240<ref name=koen>{{cite journal|bibcode=2010MNRAS.403.1949K|title=UBV(RI)C JHK observations of Hipparcos-selected nearby stars|journal=Monthly Notices of the Royal Astronomical Society|volume=403|issue=4|pages=1949|author1=Koen|first1=C.|last2=Kilkenny|first2=D.|last3=Van Wyk|first3=F.|last4=Marang|first4=F.|year=2010|doi=10.1111/j.1365-2966.2009.16182.x}}</ref> |
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| appmag_3_passband = R |
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| appmag_3 = 8,298<ref name=koen/> |
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| appmag_4_passband = I |
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| appmag_4 = 6,741<ref name=koen/> |
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| appmag_5_passband = J |
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| appmag_5 = 5,24<ref name=2mass>{{cite journal|bibcode=2003yCat.2246....0C|title=VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)|journal=VizieR On-line Data Catalog: II/246. Originally published in: 2003yCat.2246....0C|volume=2246|pages=0|author1=Cutri|first1=R. M.|last2=Skrutskie|first2=M. F.|last3=Van Dyk|first3=S.|last4=Beichman|first4=C. A.|last5=Carpenter|first5=J. M.|last6=Chester|first6=T.|last7=Cambresy|first7=L.|last8=Evans|first8=T.|last9=Fowler|first9=J.|last10=Gizis|first10=J.|last11=Howard|first11=E.|last12=Huchra|first12=J.|last13=Jarrett|first13=T.|last14=Kopan|first14=E. L.|last15=Kirkpatrick|first15=J. D.|last16=Light|first16=R. M.|last17=Marsh|first17=K. A.|last18=McCallon|first18=H.|last19=Schneider|first19=S.|last20=Stiening|first20=R.|last21=Sykes|first21=M.|last22=Weinberg|first22=M.|last23=Wheaton|first23=W. A.|last24=Wheelock|first24=S.|last25=Zacarias|first25=N.|year=2003}}</ref> |
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| appmag_6_passband = H |
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| appmag_6 = 4,83<ref name=2mass/> |
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| appmag_7_passband = K |
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| appmag_7 = 4,524<ref name=2mass/> |
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| r-i = <!--R-I color--> |
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| v-r = <!--V-R color--> |
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| b-v = 1,713<ref name=koen/> |
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| u-b = 1,257<ref name=koen/> |
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| variable = [[BY Draconis variable|BY Draconis]] |
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}} |
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{{Starbox astrometry |
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| radial_v = −110,6 ± 0,2<ref name="Bobylev:arXiv1003.2160">{{cite journal |last=Bobylev |first=Vadim V. |date=March 2010 |title=Searching for Stars Closely Encountering with the Solar System |journal=Astronomy Letters |volume=36 |issue=3 |pages=220–226 |doi=10.1134/S1063773710030060 |arxiv=1003.2160 |bibcode=2010AstL...36..220B}}</ref> |
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| prop_mo_ra = −798,71<ref name=hipparcos/> |
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| prop_mo_dec = 10337,77<ref name=hipparcos/> |
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| parallax = 547.451 |
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| p_error = 0.290 |
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| parallax_footnote = |
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| dist_ly = |
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| dist_pc = |
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| absmag_v = 13,21<ref name=koen/> |
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}} |
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{{Starbox detail |
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| source = <!--[source url]--> |
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| mass = 0,144<ref name=al36_3_220/> |
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| radius = {{nowrap|0,196 ± 0,008}}<ref name=aaa505_1_205/> |
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| gravity = <!--Surface gravity (given as the base 10 logarithm expressed in cgs units)--> |
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| luminosity_visual = 0,0004<ref name="Dawson" /> |
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| luminosity_bolometric = 0,0035<ref name="Dawson" /> |
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| temperature = 3.134 ± 102<ref name="Dawson" /> |
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| metal = 10–32% [[Matahari]]<ref name="Gizis">{{cite journal | author = Gizis, John E. |date=February 1997| title = M-Subdwarfs: Spectroscopic Classification and the Metallicity Scale | journal = The Astronomical Journal | bibcode = 1997AJ....113..806G | volume = 113 | issue = 2 | page = 820 | doi=10.1086/118302|arxiv = astro-ph/9611222 }}</ref> |
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| rotation = 130,4 [[hari|h]]<ref name="Benedict1998" /> |
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| age = ≈ 10 miliar <ref name="Riedel2005" /> |
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}} |
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{{Starbox catalog |
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| names = "Barnard's Runaway Star", "Greyhound of the Skies",<ref name=bis11_12_170/> [[Bonner Durchmusterung|BD]]+04°3561a, [[General Catalogue of Trigonometric Parallaxes|GCTP]] 4098.00, [[Henry Lee Giclas|Gl]] 140-024, [[Gliese-Jahreiss catalogue|Gliese]] 699, [[Hipparcos Catalogue|HIP]] 87937, [[Luyten Five-Tenths catalogue|LFT]] 1385, [[Luyten Half-Second catalogue|LHS]] 57, [[Luyten Two-Tenths catalogue|LTT]] 15309, Munich 15040, [[List of nearest stars|Proxima Ophiuchi]],<ref name=an230_77/> [[Variable star designation|V2500 Ophiuchi]], ''[[Latin language|Velox Barnardi]]'',<ref name=rukl1999/> [[Alexander N. Vyssotsky|Vyssotsky]] 799 |
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}} |
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{{Starbox reference |
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| Simbad = BD%2B043561a |
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| ARICNS = 01453 |
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}} |
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{{Starbox end}} |
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'''Bintang Barnard''' (Nama lain : '''Velox Barnadi / V2500 Oph / HIP 87937''' / '''GJ 699)''' adalah [[bintang]] [[katai merah]] yang berjarak 5,95 [[tahun cahaya]] dari bumi dan bintang ini hanya memiliki massa yang kecil, yaitu 0.17 [[Massa matahari]]. ditemukan oleh Astronom [[E.E. Barnard]] |
'''Bintang Barnard''' (Nama lain : '''Velox Barnadi / V2500 Oph / HIP 87937''' / '''GJ 699)''' adalah [[bintang]] [[katai merah]] yang berjarak 5,95 [[tahun cahaya]] dari bumi dan bintang ini hanya memiliki massa yang kecil, yaitu 0.17 [[Massa matahari]]. ditemukan oleh Astronom [[E.E. Barnard]] |
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Revisi per 29 Mei 2018 21.37
Data pengamatan Epos J2000.0 Ekuinoks J2000.0 | |
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Rasi bintang | Ophiuchus |
Pengucapan | /ˈbɑːrnərd/ |
Asensio rekta | 17j 57m 48,49803d[1] |
Deklinasi | +04° 41′ 36,2072″[1] |
Magnitudo tampak (V) | 9,511[2] |
Ciri-ciri | |
Kelas spektrum | M4.0V[3] |
Magnitudo semu (U) | 12,497[2] |
Magnitudo semu (B) | 11,240[2] |
Magnitudo semu (R) | 8,298[2] |
Magnitudo semu (I) | 6,741[2] |
Magnitudo semu (J) | 5,24[4] |
Magnitudo semu (H) | 4,83[4] |
Magnitudo semu (K) | 4,524[4] |
Indeks warna U−B | 1,257[2] |
Indeks warna B−V | 1,713[2] |
Jenis variabel | BY Draconis |
Astrometri | |
Kecepatan radial (Rv) | −110,6 ± 0,2[5] km/s |
Gerak diri (μ) | RA: −798,71[1] mdb/thn Dek.: 10337,77[1] mdb/thn |
Paralaks (π) | 547,451±0,290 mdb |
Jarak | 5,958 ± 0,003 tc (1,8266 ± 0,0010 pc) |
Magnitudo mutlak (MV) | 13,21[2] |
Detail | |
Massa | 0,144[6] M☉ |
Radius | 0,196 ± 0,008[7] R☉ |
Luminositas (bolometrik) | 0,0035[8] L☉ |
Luminositas (visual, LV) | 0,0004[8] L☉ |
Suhu | 3.134 ± 102[8] K |
Metalisitas | 10–32% Matahari[9] |
Rotasi | 130,4 h[10] |
Usia | ≈ 10 miliar [11] tahun |
Penamaan lain | |
"Barnard's Runaway Star", "Greyhound of the Skies",[12] BD+04°3561a, GCTP 4098.00, Gl 140-024, Gliese 699, HIP 87937, LFT 1385, LHS 57, LTT 15309, Munich 15040, Proxima Ophiuchi,[13] V2500 Ophiuchi, Velox Barnardi,[14] Vyssotsky 799 | |
Referensi basis data | |
SIMBAD | data |
ARICNS | data |
Bintang Barnard (Nama lain : Velox Barnadi / V2500 Oph / HIP 87937 / GJ 699) adalah bintang katai merah yang berjarak 5,95 tahun cahaya dari bumi dan bintang ini hanya memiliki massa yang kecil, yaitu 0.17 Massa matahari. ditemukan oleh Astronom E.E. Barnard
Bintang Barnard merupakan bintang terdekat kedua setelah sistem bintang Centauri (Alpha Centauri, Beta Centauri, dan Proxima Centauri) dan terletak di Rasi bintang Ophiuchus, tepatnya di barat Beta Ophiuchi.
Bintang ini sudah berumur sekitar 11-12 Milliar tahun (sekitar 2x lipat Matahari). Variasi Periodik kecil pada cahaya bintang menujukkan bahwa bintang ini berotasi sangat lambat, sekitar 130 hari sekali rotasi.
- ^ a b c d Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- ^ a b c d e f g h Koen, C.; Kilkenny, D.; Van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society. 403 (4): 1949. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x.
- ^ Gizis, John E. (1997). "M-Subdwarfs: Spectroscopic Classification and the Metallicity Scale". The Astronomical Journal. 113: 806. arXiv:astro-ph/9611222 . Bibcode:1997AJ....113..806G. doi:10.1086/118302.
- ^ a b c Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally published in: 2003yCat.2246....0C. 2246: 0. Bibcode:2003yCat.2246....0C.
- ^ Bobylev, Vadim V. (March 2010). "Searching for Stars Closely Encountering with the Solar System". Astronomy Letters. 36 (3): 220–226. arXiv:1003.2160 . Bibcode:2010AstL...36..220B. doi:10.1134/S1063773710030060.
- ^ Kesalahan pengutipan: Tag
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tidak sah; tidak ditemukan teks untuk ref bernamaal36_3_220
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tidak sah; tidak ditemukan teks untuk ref bernamaaaa505_1_205
- ^ a b c Kesalahan pengutipan: Tag
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tidak sah; tidak ditemukan teks untuk ref bernamaDawson
- ^ Gizis, John E. (February 1997). "M-Subdwarfs: Spectroscopic Classification and the Metallicity Scale". The Astronomical Journal. 113 (2): 820. arXiv:astro-ph/9611222 . Bibcode:1997AJ....113..806G. doi:10.1086/118302.
- ^ Kesalahan pengutipan: Tag
<ref>
tidak sah; tidak ditemukan teks untuk ref bernamaBenedict1998
- ^ Kesalahan pengutipan: Tag
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tidak sah; tidak ditemukan teks untuk ref bernamaRiedel2005
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tidak sah; tidak ditemukan teks untuk ref bernamabis11_12_170
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tidak sah; tidak ditemukan teks untuk ref bernamaan230_77
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tidak sah; tidak ditemukan teks untuk ref bernamarukl1999