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{{short description|Star in the constellation Virgo}}
{{refimprove}}
{{Starbox begin
{{Starbox begin
| name = 70 Virginis
| name = 70 Virginis
}}
}}
{{Starbox image
{{Starbox image
| image = [[Image:70 virginis.jpg|250px]]
| image = [[Berkas:70 virginis.jpg|250px]]
| caption = 70 Virginis
| caption = 70 Virginis
}}
}}
{{Starbox observe
{{Starbox observe
| epoch = J2000.0
| epoch = J2000.0
| constell = [[Virgo]]
| constell = [[Virgo (constellation)|Virgo]]
| ra = {{RA|13|28|25.80819}}<ref name=GaiaDR2>{{citation|url=http://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%20DR2%203740176925743650688 | title= Gaia DR2 record for this source}}</ref>
| ra = {{RA|13|28|25.81}}<ref name="van Leeuwen2007"/>
| dec = {{DEC|+13|46|43.6}}<ref name="van Leeuwen2007"/>
| dec = {{DEC|+13|46|43.6430}}<ref name=GaiaDR2/>
| appmag_v = +5.00
| appmag_v = +4.97<ref name=Anderson2012/>
}}
}}
{{Starbox character
{{Starbox character
| class = G4 V-IV<ref name="Strassmeier2017"/>
| class = G4&nbsp;V-IV<ref name="Strassmeier2017"/>
| r-i = 0.36
| r-i = 0.36
| v-r = 0.39
| v-r = 0.39
| b-v = {{Val|0.714|0.007}}<ref name=Anderson2012>{{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | arxiv=1108.4971 | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | postscript=. }}</ref>
| b-v = 0.71
| u-b = 0.26
| u-b = 0.26
| variable = tidak ada
| variable = none
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v = 5
| radial_v = {{Val|4.44|0.13}}<ref name=Anderson2012/>
| prop_mo_ra = −236.02 ± 0.24<ref name="van Leeuwen2007"/>
| prop_mo_ra = −235.562<ref name=GaiaDR2/>
| prop_mo_dec = −575.73 ± 0.19<ref name="van Leeuwen2007"/>
| prop_mo_dec = −576.283<ref name=GaiaDR2/>
| parallax = 55.60
| parallax = 55.8347
| p_error = 0.17
| p_error = 0.1730
| parallax_footnote =<ref name="van Leeuwen2007"/>
| parallax_footnote =<ref name="van Leeuwen2007"/>
| absmag_v = +3.70 ± 0.01 <ref name="Holmberg">{{cite web | url=http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/130/gcs3&recno=9191 | title=HD 117176 | work=Geneva-Copenhagen Survey of Solar neighbourhood III | author=Holmberg | date=2009 | accessdate=2010-02-02|display-authors=etal}}</ref>
| absmag_v = {{Val|+3.70|0.01}}<ref name="Holmberg">{{cite web | url=http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/130/gcs3&recno=9191 | title=HD 117176 | work=Geneva-Copenhagen Survey of Solar neighbourhood III | author=Holmberg | date=2009 | accessdate=2010-02-02|display-authors=etal}}</ref>
}}
}}
{{Starbox detail
{{Starbox detail
Baris 35: Baris 35:
| metal_fe = −0.06<ref name="apj771_1_40"/>
| metal_fe = −0.06<ref name="apj771_1_40"/>
| mass = 1.12<ref name=apjss192_1_2/>
| mass = 1.12<ref name=apjss192_1_2/>
| radius = 1.9 ± 0.1 <ref name="Belle">{{cite journal | url=http://www.iop.org/EJ/abstract/0004-637X/694/2/1085/ | author=Gerard T. van Belle | author2=Kaspar von Braun | last-author-amp=yes | title=Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars | journal=The [[Astrophysical Journal]] | volume=694 | issue=2 | date=2009 | pages=1085–1098 | format=abstract | doi=10.1088/0004-637X/694/2/1085 | bibcode=2009ApJ...694.1085V|arxiv = 0901.1206 }} ([https://arxiv.org/abs/0901.1206 web Preprint])</ref>
| radius = {{Val|1.9|0.1}}<ref name="Belle">{{cite journal | author=Gerard T. van Belle | author2=Kaspar von Braun | last-author-amp=yes | title=Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars | journal=The Astrophysical Journal | volume=694 | issue=2 | date=2009 | pages=1085–1098 | doi=10.1088/0004-637X/694/2/1085 | bibcode=2009ApJ...694.1085V|arxiv = 0901.1206 }} ([https://arxiv.org/abs/0901.1206 web Preprint])</ref>
| gravity = 3.58
| gravity = 3.58
| luminosity = 2.92 ± 0.03<ref name="apj771_1_40"/>
| luminosity = {{Val|2.92|0.03}}<ref name="apj771_1_40"/>
| temperature = 5,406 ± 64<ref name="apj771_1_40"/>
| temperature = {{Val|5406|64|fmt=commas}}<ref name="apj771_1_40"/>
| rotational_velocity = 4.83<ref name=MartínezArnáiz2010>{{citation | display-authors=1 | last1=Martínez-Arnáiz | first1=R. | last2=Maldonado | first2=J. | last3=Montes | first3=D. | last4=Eiroa | first4=C. | last5=Montesinos | first5=B. | title=Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter | journal=Astronomy and Astrophysics | volume=520 | page=A79 | date=September 2010 | doi=10.1051/0004-6361/200913725 | postscript=. | bibcode=2010A&A...520A..79M | arxiv=1002.4391 }}</ref>
| rotation =
}}
}}
{{Starbox catalog
{{Starbox catalog
|names = [[Henry Draper catalogue|HD]] 117176, [[Hipparcos catalogue|HIP]] 65721, [[Harvard Revised catalogue|HR]] 5072, [[Durchmusterung|BD]]+14°2621, Gl 512.1, WDS 13284+1347A, and SAO 100582.
|names = {{odlist | F=70 Vir | BD=+14°2621 | GJ=512.1 | HD=117176 | HIP=65721 | HR=5072 | SAO=100582 | WDS=13284+1347A }}
}}
}}
{{Starbox reference
{{Starbox reference
Baris 52: Baris 52:
{{Starbox end}}
{{Starbox end}}


'''70 Virginis''' (disingkat '''70 Vir''') adalah bintang kerdil kuning yang berjarak sekitar 59 [[tahun cahaya]] <ref name="van Leeuwen2007"/>di [[Virgo|konstelasi Virgo]]. Bintang ini memiliki cahaya luar biasa cerah untuk jenis [[spektral]] dan mungkin baru mulai berkembang ke fase [[Raksasa merah]].
'''70 Virginis''' (disingkat '''70 Vir''') adalah bintang katai kuning yang berjarak sekitar 59 [[tahun cahaya]]<ref name="van Leeuwen2007"/> di [[Virgo|konstelasi Virgo]]. Bintang ini memiliki cahaya luar biasa cerah untuk jenis [[spektral]] dan mungkin baru mulai berkembang ke fase [[raksasa merah]].


Pada tahun 1996, 70 Virginis diketahui memiliki planet yang beranama [[70 virginis b]]. Ada juga piringan debu dengan suhu maksimum 153 [[Kelvin|K]] terletak pada jarak 3,4 [[Satuan astronomi|AU]] dari bintang.
Pada tahun 1996, 70 Virginis diketahui memiliki [[eksoplanet]] yang mengorbit mengelilinginya.<ref name="Marcy1996"/> Ada juga piringan debu dengan suhu maksimum 153 [[Kelvin|K]] terletak pada jarak 3,4 [[Satuan astronomi|AU]] dari bintang.<ref name="Trilling2008"/>

== Sistem planet ==
Penemuan planet di sekeliling 70 Virginis diumumkan pada 17 Januari 1996 pada pertemuan [[American Astronomical Society]] di San Antonio, Texas. Planet itu terdeteksi menggunakan pengukuran [[kecepatan radial]] yang diambil dengan [[teleskop C. Donald Shane]] di [[Observatorium Lick]].<ref name="Marcy1996"/><ref name="berkeley"/>
{{OrbitboxPlanet begin
| table_ref = <ref name="Kane2015"/>
}}
{{OrbitboxPlanet
| exoplanet = [[70 Virginis b|b]]
| mass = {{val|7.40|0.02|p=>}}
| period = {{val|116.6926|0.0014}}
| semimajor = {{val|0.481|0.003}}
| eccentricity = {{val|0.399|0.002}}
}}
{{OrbitboxPlanet disk
| disk = Debu disc
| periapsis = >3.4
}}
{{Orbitbox end}}


== Referensi ==
== Referensi ==
Baris 80: Baris 98:
| arxiv=1306.2974 | doi=10.1088/0004-637X/771/1/40
| arxiv=1306.2974 | doi=10.1088/0004-637X/771/1/40
| bibcode=2013ApJ...771...40B | postscript=.
| bibcode=2013ApJ...771...40B | postscript=.
}} </ref>
}}</ref>

<ref name="Marcy1996">{{cite journal | title=A Planetary Companion to 70 Virginis | url=http://iopscience.iop.org/article/10.1086/310096/fulltext/ | last1=Marcy | first1=Geoffrey W. | last2=Butler | first2=R. Paul | journal=The Astrophysical Journal Letters | volume=464 | issue=1 | pages=L147–L151 | date=1996 | bibcode=1996ApJ...464L.147M | doi=10.1086/310096 }}</ref>

<ref name="Trilling2008">{{cite journal | title=Debris Disks around Sun-like Stars | url=http://iopscience.iop.org/article/10.1086/525514/fulltext/ | last1=Trilling | first1=D. E. | last2=Bryden | first2=G. | last3=Beichman | first3=C. A. | last4=Rieke | first4=G. H. | last5=Su | first5=K. Y. L. | last6=Stansberry | first6=J. A. | last7=Blaylock | first7=M. | last8=Stapelfeldt | first8=K. R. | last9=Beeman | first9=J. W. | display-authors=1 | journal=The Astrophysical Journal | volume=674 | issue=2 | pages=1086–1105 | date=2008 | arxiv=0710.5498 | bibcode=2008ApJ...674.1086T | doi=10.1086/525514 }}</ref>

<ref name="berkeley">{{cite press release | title=Discovery of two new planets -- the second and third within the last three months -- proves they aren't rare in our galaxy | last=Sanders | first=Robert | date=January 17, 1996 | publisher=University of California, Berkeley | url=http://www.berkeley.edu/news/media/releases/96legacy/releases.96/14301.html | accessdate=December 22, 2017 }}</ref>

<ref name="Kane2015">{{cite journal | title=A Comprehensive Characterization of the 70 Virginis Planetary System | url=http://iopscience.iop.org/article/10.1088/0004-637X/806/1/60/meta | last1=Kane | first1=Stephen R. | last2=Boyajian | first2=Tabetha S. | last3=Henry | first3=Gregory W. | last4=Feng | first4=Y. Katherina | last5=Hinkel | first5=Natalie R. | last6=Fischer | first6=Debra A. | last7=Braun | first7=Kaspar von | last8=Howard | first8=Andrew W. | last9=Wright | first9=Jason T. | display-authors=1 | journal=The Astrophysical Journal | volume=806 | at=60 | year=2015 | arxiv=1504.04066 | bibcode=2015ApJ...806...60K | doi=10.1088/0004-637X/806/1/60 }}</ref>


}}
}}


== Sumber ==
== Sumber ==
* [http://www.solstation.com/stars2/70virgin.htm :bintang 70 virginis]
* [http://www.solstation.com/stars2/70virgin.htm:bintang 70 virginis]{{Pranala mati|date=Januari 2021 |bot=InternetArchiveBot |fix-attempted=yes }}
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{{DEFAULTSORT:70 Virginis}}
[[Kategori:Bintang]]
[[Kategori:Bintang]]
[[Kategori:Rasi bintang Virgo]]
[[Kategori:Rasi bintang Virgo]]


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Revisi terkini sejak 6 Januari 2023 06.47

70 Virginis

70 Virginis
Data pengamatan
Epos J2000.0      Ekuinoks J2000.0
Rasi bintang Virgo
Asensio rekta  13j 28m 25.80819d[1]
Deklinasi  +13° 46′ 43.6430″[1]
Magnitudo tampak (V) +4.97[2]
Ciri-ciri
Kelas spektrum G4 V-IV[3]
Indeks warna U−B 0.26
Indeks warna B−V 0,714±0,007[2]
Indeks warna V−R 0.39
Indeks warna R−I 0.36
Jenis variabel none
Astrometri
Kecepatan radial (Rv)4,44±0,13[2] km/s
Gerak diri (μ) RA: −235.562[1] mdb/thn
Dek.: −576.283[1] mdb/thn
Paralaks (π)55,8347±0,1730[4] mdb
Jarak58,4 ± 0,2 tc
(17,91 ± 0,06 pc)
Magnitudo mutlak (MV)+3,70±0,01[5]
Detail
Massa1.12[6] M☉
Radius1,9±0,1[7] R☉
Luminositas2,92±0,03[8] L☉
Gravitasi permukaan (log g)3.58
Suhu5,406±64[8] K
Metalisitas [Fe/H]−0.06[8]
Kecepatan rotasi (v sin i)4.83[9] km/s
Usia7.9[8] gigatahun
Penamaan lain
70 Vir, BD+14°2621, GJ 512.1, HD 117176, HIP 65721, HR 5072, SAO 100582, WDS 13284+1347A
Referensi basis data
SIMBADdata
Exoplanet Archivedata
ARICNSdata
Extrasolar Planets
Encyclopaedia		data

70 Virginis (disingkat 70 Vir) adalah bintang katai kuning yang berjarak sekitar 59 tahun cahaya[4] di konstelasi Virgo. Bintang ini memiliki cahaya luar biasa cerah untuk jenis spektral dan mungkin baru mulai berkembang ke fase raksasa merah.

Pada tahun 1996, 70 Virginis diketahui memiliki eksoplanet yang mengorbit mengelilinginya.[10] Ada juga piringan debu dengan suhu maksimum 153 K terletak pada jarak 3,4 AU dari bintang.[11]

Sistem planet

[sunting | sunting sumber]

Penemuan planet di sekeliling 70 Virginis diumumkan pada 17 Januari 1996 pada pertemuan American Astronomical Society di San Antonio, Texas. Planet itu terdeteksi menggunakan pengukuran kecepatan radial yang diambil dengan teleskop C. Donald Shane di Observatorium Lick.[10][12]

Sistem keplanetan 70 Virginis[13]
Anggota
(diurut dari bintang) 		Massa Sumbu semimayor
(AU) 		Periode orbit
(hari) 		Eksentrisitas Inklinasi Jari-jari
b >7,40±0,02 MJ 0,481±0,003 116,6926±0,0014 0,399±0,002 — —
Debu disc >3.4 AU — —

Referensi

[sunting | sunting sumber]
  1. ^ a b c d Gaia DR2 record for this source 
  2. ^ a b c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971 alt=Dapat diakses gratis, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015. 
  3. ^ Strassmeier, K. G.; Ilyin, I.; Weber, M. (2017). "PEPSI deep spectra. II. Gaia benchmark stars and other M-K standards". arΧiv:1712.06967 [astro-ph.EP]. 
  4. ^ 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.  Vizier catalog entry
  5. ^ Holmberg; et al. (2009). "HD 117176". Geneva-Copenhagen Survey of Solar neighbourhood III. Diakses tanggal 2010-02-02. 
  6. ^ Shaya, Ed J.; Olling, Rob P. (January 2011), "Very Wide Binaries and Other Comoving Stellar Companions: A Bayesian Analysis of the Hipparcos Catalogue", The Astrophysical Journal Supplement, 192 (1): 2, arXiv:1007.0425 alt=Dapat diakses gratis, Bibcode:2011ApJS..192....2S, doi:10.1088/0067-0049/192/1/2 
  7. ^ Gerard T. van Belle & Kaspar von Braun (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars". The Astrophysical Journal. 694 (2): 1085–1098. arXiv:0901.1206 alt=Dapat diakses gratis. Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085.  (web Preprint)
  8. ^ a b c d Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal, 771 (1): 31, arXiv:1306.2974 alt=Dapat diakses gratis, Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40, 40. 
  9. ^ Martínez-Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter", Astronomy and Astrophysics, 520: A79, arXiv:1002.4391 alt=Dapat diakses gratis, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725. 
  10. ^ a b Marcy, Geoffrey W.; Butler, R. Paul (1996). "A Planetary Companion to 70 Virginis". The Astrophysical Journal Letters. 464 (1): L147–L151. Bibcode:1996ApJ...464L.147M. doi:10.1086/310096. 
  11. ^ Trilling, D. E.; et al. (2008). "Debris Disks around Sun-like Stars". The Astrophysical Journal. 674 (2): 1086–1105. arXiv:0710.5498 alt=Dapat diakses gratis. Bibcode:2008ApJ...674.1086T. doi:10.1086/525514. 
  12. ^ Sanders, Robert (January 17, 1996). "Discovery of two new planets -- the second and third within the last three months -- proves they aren't rare in our galaxy" (Siaran pers). University of California, Berkeley. Diakses tanggal December 22, 2017. 
  13. ^ Kane, Stephen R.; et al. (2015). "A Comprehensive Characterization of the 70 Virginis Planetary System". The Astrophysical Journal. 806. 60. arXiv:1504.04066 alt=Dapat diakses gratis. Bibcode:2015ApJ...806...60K. doi:10.1088/0004-637X/806/1/60. 

Sumber

[sunting | sunting sumber]
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