Bintang Barnard: Perbedaan antara revisi
Tampilan
Konten dihapus Konten ditambahkan
k Bot: Perubahan kosmetika |
Tag: Suntingan perangkat seluler Suntingan peramban seluler Suntingan seluler lanjutan |
||
(9 revisi perantara oleh 4 pengguna tidak ditampilkan) | |||
Baris 4: | Baris 4: | ||
{{Starbox image |
{{Starbox image |
||
| image = [[Berkas:Barnardstar2006.jpg|250px]] |
| image = [[Berkas:Barnardstar2006.jpg|250px]] |
||
| caption = Lokasi Bintang Barnard |
| caption = Lokasi Bintang Barnard, 2006 |
||
}} |
}} |
||
{{Starbox observe |
{{Starbox observe |
||
| epoch = [[J2000.0]] |
| epoch = [[J2000.0]] |
||
| constell = [[ |
| constell = [[Ofiukus]] |
||
| pronounce = {{IPAc-en|ˈ|b|ɑr|n|ər|d}} |
| pronounce = {{IPAc-en|ˈ|b|ɑr|n|ər|d|z}} |
||
| ra = {{RA|17|57|48 |
| 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=653–664|last1=Van Leeuwen|first1=F.|year=2007|doi=10.1051/0004-6361:20078357|arxiv = 0708.1752 }}</ref> |
||
| dec = {{DEC|+04|41|36 |
| dec = {{DEC|+04|41|36.2072}}<ref name=hipparcos/> |
||
| appmag_v = 9 |
| appmag_v = 9.511<ref name=koen/> |
||
}} |
}} |
||
{{Starbox character |
{{Starbox character |
||
| 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= |
| 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=806–822|last1=Gizis|first1=John E.|year=1997|doi=10.1086/118302|arxiv = astro-ph/9611222 }}</ref> |
||
| appmag_1_passband = U |
| appmag_1_passband = U |
||
| appmag_1 = 12 |
| appmag_1 = 12.497<ref name=koen/> |
||
| appmag_2_passband = B |
| appmag_2_passband = B |
||
| appmag_2 = 11 |
| 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|last1=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> |
||
| appmag_3_passband = R |
| appmag_3_passband = R |
||
| appmag_3 = 8 |
| appmag_3 = 8.298<ref name=koen/> |
||
| appmag_4_passband = I |
| appmag_4_passband = I |
||
| appmag_4 = 6 |
| appmag_4 = 6.741<ref name=koen/> |
||
| appmag_5_passband = J |
| appmag_5_passband = J |
||
| appmag_5 = 5 |
| 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|last1=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> |
||
| appmag_6_passband = H |
| appmag_6_passband = H |
||
| appmag_6 = 4 |
| appmag_6 = 4.83<ref name=2mass/> |
||
| appmag_7_passband = K |
| appmag_7_passband = K |
||
| appmag_7 = 4 |
| appmag_7 = 4.524<ref name=2mass/> |
||
| r-i = < |
| r-i = 1.557<ref name=koen/> |
||
| v-r = < |
| v-r = 1.213<ref name=koen/> |
||
| b-v = 1 |
| b-v = 1.713<ref name=koen/> |
||
| u-b = 1 |
| u-b = 1.257<ref name=koen/> |
||
| variable = [[Variabel BY Draconis|BY Draconis]]<ref name=gcvs>{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/gcvs. Originally Published in: 2009yCat....102025S|volume=1|pages=B/gcvs|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}</ref> |
|||
| variable = [[BY Draconis variable|BY Draconis]] |
|||
}} |
}} |
||
{{Starbox astrometry |
{{Starbox astrometry |
||
| radial_v = −110 |
| 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> |
||
| prop_mo_ra = |
| prop_mo_ra = −802.803<ref name=Gaia>{{Cite DR2|4472832130942575872}}</ref> |
||
| prop_mo_dec = |
| prop_mo_dec = 10362.542<ref name=Gaia/> |
||
| parallax = 547. |
| parallax = 547.4506 |
||
| p_error = 0. |
| p_error = 0.2899 |
||
| parallax_footnote = |
| parallax_footnote =<ref name=Gaia/> |
||
| dist_ly = |
| dist_ly = |
||
| dist_pc = |
| dist_pc = |
||
| absmag_v = 13 |
| absmag_v = 13.21<ref name=koen/> |
||
}} |
}} |
||
{{Starbox detail |
{{Starbox detail |
||
| source = <!--[source url]--> |
| source = <!--[source url]--> |
||
| mass = 0 |
| mass = 0.144<ref name=al36_3_220/> |
||
| radius = {{nowrap|0 |
| radius = {{nowrap|0.196 ± 0.008}}<ref name=aaa505_1_205/> |
||
| gravity = <!--Surface gravity (given as the base 10 logarithm expressed in cgs units)--> |
| gravity = <!--Surface gravity (given as the base 10 logarithm expressed in cgs units)--> |
||
| luminosity_visual = 0 |
| luminosity_visual = 0.0004<ref name="Dawson" /> |
||
| luminosity_bolometric = 0 |
| luminosity_bolometric = 0.0035<ref name="Dawson" /> |
||
| temperature = 3 |
| temperature = 3,134 ± 102<ref name="Dawson" /> |
||
| 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> |
| 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> |
||
| rotation = 130 |
| rotation = 130.4 [[hari|h]]<ref name="Benedict1998" /> |
||
| |
| age_gyr = ≈ 10<ref name="Riedel2005" /> |
||
}} |
}} |
||
{{Starbox catalog |
{{Starbox catalog |
||
Baris 67: | Baris 67: | ||
}} |
}} |
||
{{Starbox end}} |
{{Starbox end}} |
||
'''Bintang Barnard''' (Nama lain |
'''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]] [[Ofiukus|Ophiuchus]], tepatnya di barat [[Beta Ophiuchi]]. |
Bintang Barnard merupakan bintang terdekat kedua setelah sistem bintang Centauri ([[Alpha Centauri]], [[Beta Centauri]], dan [[Proxima Centauri]]) dan terletak di [[Rasi bintang]] [[Ofiukus|Ophiuchus]], tepatnya di barat [[Beta Ophiuchi]]. |
||
[[Berkas:Barnard Star 2001-2010.gif|jmpl|274x274px|gerakan bintang barnard dari tahun 2001-2010]] |
[[Berkas:Barnard Star 2001-2010.gif|jmpl|274x274px|gerakan bintang barnard dari tahun 2001-2010]] |
||
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. |
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. |
||
== Planet == |
|||
{{OrbitboxPlanet begin |
|||
| name = Bintang Barnard |
|||
| table_ref = <ref>{{Cite journal|last=Anglada-Escudé|first=G.|last2=Wang|first2=S. X.|last3=Tsapras|first3=Y.|last4=Mascareño|first4=A. Suárez|last5=Street|first5=R. A.|last6=Staab|first6=D.|last7=Shectman|first7=S. A.|last8=Seifert|first8=W.|last9=Schweitzer|first9=A.|date=2018-11-14|year=|title=A candidate super-Earth planet orbiting near the snow line of Barnard's star|url=https://arxiv.org/abs/1811.05955v2|journal=|language=en|volume=|issue=|pages=|arxiv=1811.05955v2|doi=10.1038/s41586-018-0677-y}}</ref> |
|||
}} |
|||
{{OrbitboxPlanet |
|||
| exoplanet = [[Bintang Barnard b|b]] |
|||
| mass_earth = ≥{{Val|3.23|0.44}} |
|||
| period = {{Val|232.80|0.38|0.41}} |
|||
| semimajor = {{Val|0.404|0.018}} |
|||
| eccentricity = {{Val|0.32|0.1|0.15}} |
|||
| inclination = |
|||
}} |
|||
{{Orbitbox end}} |
|||
== Referensi == |
== Referensi == |
||
{{Reflist |
{{Reflist|30em|refs= |
||
<ref name=an230_77>{{cite journal | title=Einweißer Stern mit bedeutender absoluter Größe | last=Perepelkin | first=E. | journal=Astronomische Nachrichten | volume=230 | issue=4 | page=77 |date=April 1927 | language=German | bibcode=1927AN....230...77P | doi=10.1002/asna.19272300406}}</ref> |
|||
<ref name=rukl1999>{{cite book | first=Antonin | last=Rukl | year=1999 | title=Constellation Guidebook | page=158 | publisher=Sterling Publishing | isbn=978-0-8069-3979-7 }}</ref> |
|||
<ref name=bis11_12_170>{{cite journal | title=Barnard's Star and its Perturbations | journal=[[Spaceflight (magazine)|Spaceflight]] | volume=11 | page=170 | year=1969 }}</ref> |
|||
<ref name=aaa505_1_205>{{citation | last1=Demory | first1=B.-O. | last2=Ségransan | first2=D. | last3=Forveille | first3=T. | last4=Queloz | first4=D. | last5=Beuzit | first5=J.-L. | last6=Delfosse | first6=X. | last7=di Folco | first7=E. | last8=Kervella | first8=P. | last9=Le Bouquin | first9=J.-B. | last10=Perrier | first10=C. | last11=Benisty | first11=M. | last12=Duvert | first12=G. | last13=Hofmann | first13=K.-H. | last14=Lopez | first14=B. | last15=Petrov | first15=R. | title=Mass-radius relation of low and very low-mass stars revisited with the VLTI | journal=Astronomy and Astrophysics | volume=505 | issue=1 | pages=205–215 |date=October 2009 | doi=10.1051/0004-6361/200911976 | bibcode=2009A&A...505..205D |arxiv = 0906.0602 | display-authors=1 }}</ref> |
|||
<ref name="Kaler">{{cite web|first=James B. |last=Kaler |url=http://www.astro.uiuc.edu/~kaler/sow/barnard.html |title=Barnard's Star (V2500 Ophiuchi) |date=November 2005 |work=Stars |publisher=James B. Kaler |accessdate=12 July 2018 |archiveurl=https://web.archive.org/web/20060905110505/http://www.astro.uiuc.edu/~kaler/sow/barnard.html |archivedate=5 September 2006 |url-status=dead }}</ref> |
|||
}} |
|||
{{bintang-stub}} |
{{bintang-stub}} |
Revisi terkini sejak 8 Agustus 2020 06.35
Data pengamatan Epos J2000.0 Ekuinoks J2000.0 | |
---|---|
Rasi bintang | Ofiukus |
Pengucapan | /ˈbɑːrnərdz/ |
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] |
Indeks warna V−R | 1.213[2] |
Indeks warna R−I | 1.557[2] |
Jenis variabel | BY Draconis[5] |
Astrometri | |
Kecepatan radial (Rv) | −110.6 ± 0.2[6] km/s |
Gerak diri (μ) | RA: −802.803[7] mdb/thn Dek.: 10362.542[7] mdb/thn |
Paralaks (π) | 547,4506±0,2899[7] mdb |
Jarak | 5,958 ± 0,003 tc (1,8266 ± 0,0010 pc) |
Magnitudo mutlak (MV) | 13.21[2] |
Detail | |
Massa | 0.144[8] M☉ |
Radius | 0.196 ± 0.008[9] R☉ |
Luminositas (bolometrik) | 0.0035[10] L☉ |
Luminositas (visual, LV) | 0.0004[10] L☉ |
Suhu | 3,134 ± 102[10] K |
Metalisitas | 10–32% Matahari[11] |
Rotasi | 130.4 h[12] |
Usia | ≈ 10[13] gigatahun |
Penamaan lain | |
"Barnard's Runaway Star", "Greyhound of the Skies",[14] BD+04°3561a, GCTP 4098.00, Gl 140-024, Gliese 699, HIP 87937, LFT 1385, LHS 57, LTT 15309, Munich 15040, Proxima Ophiuchi,[15] V2500 Ophiuchi, Velox Barnardi,[16] 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.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/00/Barnard_Star_2001-2010.gif/274px-Barnard_Star_2001-2010.gif)
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.
Planet
[sunting | sunting sumber]Anggota (diurut dari bintang) |
Massa | Sumbu semimayor (AU) |
Periode orbit (hari) |
Eksentrisitas | Inklinasi | Jari-jari |
---|---|---|---|---|---|---|
b | ≥3,23±0,44 M⊕ | 0,404±0,018 | 232,80+0,38 −0,41 |
0,32+0,1 −0,15 |
— | — |
Referensi
[sunting | sunting sumber]- ^ 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 g h i j 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: 806–822. 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.
- ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
- ^ 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.
- ^ a b c Brown, A. G. A.; et al. (kolaborasi Gaia) (Agustus 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365
. Bibcode:2018A&A...616A...1G
. doi:10.1051/0004-6361/201833051
. Catatan Gaia DR2 untuk sumber tersebut di VizieR.
- ^ Kesalahan pengutipan: Tag
<ref>
tidak sah; tidak ditemukan teks untuk ref bernamaal36_3_220
- ^ Demory, B.-O.; et al. (October 2009), "Mass-radius relation of low and very low-mass stars revisited with the VLTI", Astronomy and Astrophysics, 505 (1): 205–215, arXiv:0906.0602
, Bibcode:2009A&A...505..205D, doi:10.1051/0004-6361/200911976
- ^ a b c Kesalahan pengutipan: Tag
<ref>
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
<ref>
tidak sah; tidak ditemukan teks untuk ref bernamaRiedel2005
- ^ "Barnard's Star and its Perturbations". Spaceflight. 11: 170. 1969.
- ^ Perepelkin, E. (April 1927). "Einweißer Stern mit bedeutender absoluter Größe". Astronomische Nachrichten (dalam bahasa German). 230 (4): 77. Bibcode:1927AN....230...77P. doi:10.1002/asna.19272300406.
- ^ Rukl, Antonin (1999). Constellation Guidebook. Sterling Publishing. hlm. 158. ISBN 978-0-8069-3979-7.
- ^ Anglada-Escudé, G.; Wang, S. X.; Tsapras, Y.; Mascareño, A. Suárez; Street, R. A.; Staab, D.; Shectman, S. A.; Seifert, W.; Schweitzer, A. (2018-11-14). "A candidate super-Earth planet orbiting near the snow line of Barnard's star" (dalam bahasa Inggris). arXiv:1811.05955v2
. doi:10.1038/s41586-018-0677-y.
<ref>
dengan nama "Kaler" yang didefinisikan di <references>
tidak digunakan pada teks sebelumnya.