Ogled vira Kepler-11

{{slog}}
{{Starbox begin
| name = Kepler-11
}}
{{Starbox image
| image = [[File:Kepler11.png|250px]]
| caption = Umetniška upodobitev zvezde Kepler 11 in njenih planetov
}}
{{Starbox observe
| constell = [[Labod (ozvezdje)|Labod]]
| epoch = J2000
| ra = {{RA|19|48|27,6228}}<ref name="Gaia DR2"/>
| dec = {{DEC|+41|54|32,903}}<ref name="Gaia DR2"/>
| appmag_v = 14.2<ref name="Lissauer2011"/>
}}
{{Starbox character
| class = G6V<ref name="Lissauer2011"/>
}}
{{Starbox astrometry
| prop_mo_ra = {{val|−0,038|0,025}}<ref name="Gaia DR2"/>
| prop_mo_dec = {{val|−7,069|0,029}}<ref name="Gaia DR2"/>
| parallax = 1,5184
| p_error = 0,0151
| parallax_footnote = <ref name="Gaia DR2"/>
| absmag_v = 4,7<ref name="Bedell2017"/>
}}
{{Starbox detail
| source = <ref name="Bedell2017"/>
| mass = {{val|1,042|0,005}}
| radius = {{val|1,021|0,025}}
| luminosity = 
| gravity = {{val|4,44|0,02}}
| temperature = {{val|5836|7}}
| metal_fe = {{val|0,062|0,007}}
| rotational_velocity = {{val|2,2|0,2}}
| age_gyr = {{val|3,2|0,9}}
}}
{{Starbox catalog
| names = [[Kepler Input Catalog|KIC]]&nbsp;6541920, [[Kepler Object of Interest|KOI]]-157<ref name="Simbad"/>
}}
{{Starbox reference
| Simbad = Kepler-11
| KIC = 6541920
}}
{{Starbox end}}
[[Slika:Kepler-11_System.jpg|thumb|right|Primerjava planetnega sestava Kepler 11 z [[Osončje]]m]]

'''Kepler-11''' je [[Sonce|Soncu]] podobna [[zvezda]] s potrjenim [[planetni sestav|planetnim sestavom]] najmanj 6 [[zunajosončni planet|planetov]] s kratkimi [[tir]]i, zadnji, 6 je od zvezde oddaljen malce dlje, kot je [[Merkur]] od Sonca, odkrit je bil 2. februarja 2011.<ref name = "Lissauer">{{navedi revijo |author=Lissauer, J.J. s sod. |title=A closely packed system of low-mass, low-density planets transiting Kepler-11 |journal=[[Nature]] |volume=470 |pages=53–58 |publisher=Nature Publishing Group |date=3.2.2011 |url=http://arxiv.org/pdf/1102.0291v1.pdf |doi=10.1038/nature09760}}</ref> Kepler 11 prvi 6-planetarni Keplerjev sistem.

Planetni sestav je bil odkrit 2. februarja 2011. Nahaja se v smeri ozvezdja [[Labod (ozvezdje)|Labod]]; zvezda je oddaljena okoli 2000 svetlobnih let. Odkrili so ga v programu Small Sky Survey s teleskopom Kepler. Vseh šest planetov prehaja disk zvezde, gledano z Zemlje. To omogoča, preko spremljanja zatemnitev zvezde s planeti, neposredne meritve periode planetov, njihove mase in premerov; sledi tudi gostota teh svetov. Kepler-11 je prvi odkril izvenosončni sistem z več kot tremi planeti v tranzitu. To je tudi najbolj znan stisnjen sistem. Planeti so poimenovali po abecedi, začenši z najmanjšim: b, c, d, e, f in g.

== Planeti ==

Nizka ocena gostote za planete ''b''-''f'' nakazuje, da nobeden od njih nima sestave, kot jo ima Zemlja;<ref name = "Boyle">{{navedi splet |last=Boyle |first=Alan |title=Planetary six-pack poses a puzzle |work=MSNBC Cosmic Log |publisher=[[msnbc.com]] |date=2.2.2011 |url=http://cosmiclog.msnbc.msn.com/_news/2011/02/01/5972312-planetary-six-pack-poses-a-puzzle |accessdate=2.2.2011 |archive-date=2018-05-13 |archive-url=https://web.archive.org/web/20180513081432/http://cosmiclog.msnbc.msn.com/_news/2011/02/01/5972312-planetary-six-pack-poses-a-puzzle |url-status=dead }}</ref> kar precej zajetno ozračje iz [[vodik]]a je predvideno za planete ''d'', ''e'' in mogoče ''f'', medtem ko planeta ''b'' in ''c'' verjetno vsebujeta velike zaloge [[led]]u in/ali H/[[helij|He]].<ref name = "Lissauer"/>

{| class="toccolours sortable" border=1 cellspacing=0 cellpadding=2 align=center style="text-align:center; border-collapse:collapse; margin-left: 0; margin-right: auto;"
|- bgcolor="#a0b0ff"
! [[planet|<br />planet]]<br />&nbsp;
! [[masa|<br />masa]]<br /><small>[ [[Zemljina masa|m<sub>E</sub>]] ]</small>
! [[polmer|<br />polmer]]<br /><small>[ [[Zemljin polmer|r<sub>E</sub>]] ]</small>
! [[gostota|<br />gostota]]<br /><small>[g/cm<sup>3</sup>]</small>
! [[orbitalna perioda|orbitalna<br />perioda]]<br /><small>[ [[dan|d]] ]</small>
! [[velika polos|glavna<br />polos]]<br /><small>[ [[astronomska enota|a.u.]] ]</small>
! [[izsrednost tira|izsrednost<br />tira]]<br /><small>[ 1 ]</small>
! [[naklon tira|naklon<br />tira]]<br /><small>[ [[kotna stopinja|°]] ]</small>
! <br />odkritje<br />[leta]
|-
! [[Kepler-11b|b]]
|| 4.3 (2.3 - 6.5) || 1.97 ± 0.19 || 3.1 (1.6 - 5.2) ||10.30375 || 0.091 || 0 || 88.5 || 2011<ref name="EPE2">{{navedi splet |title=Star : Kepler-11 |work=Extrasolar Planets Encyclopaedia |url=http://exoplanet.eu/star.php?st=Kepler-11#a_publi |accessdate=2.2.2011 |archive-date=2012-06-16 |archive-url=https://web.archive.org/web/20120616124459/http://exoplanet.eu/star.php?st=Kepler-11#a_publi |url-status=dead }}</ref>
|-
! [[Kepler-11c|c]]
|| 13.5 (7.4 - 18.3) || 3.15 ± 0.30 || 2.3 (1.2 - 3.6) ||13.02502 || 0.106 || 0 || 89 || 2011<ref name="EPE2"/>
|-
! [[Kepler-11d|d]]
|| 6.1 (4.4 - 9.2) || 3.43 ± 0.32 || 0.9 (0.6 - 1.4) ||22.68719 || 0.159 || 0 || 89.3 || 2011<ref name="EPE2"/>
|-
! [[Kepler-11e|e]]
|| 8.4 (6.5 - 10.9) || 4.52 ± 0.43 || 0.5 (0.3 - 0.7) ||31.9959 || 0.194 || 0 || 88.8 || 2011<ref name="EPE2"/>
|-
! [[Kepler-11f|f]]
|| 2.3 (1.1 - 4.5) || 2.61 ± 0.25 || 0.7 (0.3 - 1.4) ||46.68876 || 0.25 || 0 || 89.4 || 2011<ref name="EPE2"/>
|-
! [[Kepler-11g|g]]
|| < 300 (0.95 [[Jupitrovih mas|M<sub>J</sub>]]) || 3.66 ± 0.35 || ||118.37774 || 0.462 || 0 || 89.8 || 2011<ref name="EPE2"/>
|-
|colspan=9|[[Slika:Kepler11 system sideview.png|640px]]<br />Relativna velikost in lege 6 planetov planetnega sestava Kepler-11<br />(Zvezda ''a'' je rumenkasta in ni prikazana v pravem merilu, medtem, ko so planeti povečani tudi do 50 krat bolj, kot so v pravem razmerju)
|}

== Sklici ==
{{Reflist|refs=

<ref name="Bedell2017">{{cite journal | title=Kepler-11 is a Solar Twin: Revising the Masses and Radii of Benchmark Planets via Precise Stellar Characterization | url=http://iopscience.iop.org/article/10.3847/1538-4357/aa6a1d/meta | last1=Bedell | first1=Megan | last2=Bean | first2=Jacob L. | last3=Meléndez | first3=Jorge | last4=Mills | first4=Sean M. | last5=Fabrycky | first5=Daniel C. | last6=Freitas | first6=Fabrício C. | last7=Ramírez | first7=Ivan | last8=Asplund | first8=Martin | last9=Liu | first9=Fan | last10=Yong | first10=David | display-authors=1 | journal=The Astrophysical Journal | volume=839 | issue=2 | at=94 | year=2017 | arxiv=1611.06239 | bibcode=2017ApJ...839...94B | doi=10.3847/1538-4357/aa6a1d }}</ref>

<ref name="Gaia DR2">{{cite DR2}} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/345/gaia2&-c=297.11509487221%20%2b41.90910918938,eq=ICRS,rs=0.005 Gaia Data Release 2 catalog entry]</ref>

<ref name="Lissauer2011">{{cite journal | title=A closely packed system of low-mass, low-density planets transiting Kepler-11 | last1=Lissauer | first1=Jack J. | last2=Fabrycky | first2=Daniel C. | last3=Ford | first3=Eric B. | last4=Borucki | first4=William J. | last5=Fressin | first5=Francois | last6=Marcy | first6=Geoffrey W. | last7=Orosz | first7=Jerome A. | last8=Rowe | first8=Jason F. | last9=Torres | first9=Guillermo | last10=Welsh | first10=William F. | last11=Batalha | first11=Natalie M. | last12=Bryson | first12=Stephen T. | last13=Buchhave | first13=Lars A. | last14=Caldwell | first14=Douglas A. | last15=Carter | first15=Joshua A. | last16=Charbonneau | first16=David | last17=Christiansen | first17=Jessie L. | last18=Cochran | first18=William D. | last19=Desert | first19=Jean-Michel | last20=Dunham | first20=Edward W. | last21=Fanelli | first21=Michael N. | last22=Fortney | first22=Jonathan J. | last23=Gautier III | first23=Thomas N. | last24=Geary | first24=John C. | last25=Gilliland | first25=Ronald L. | last26=Haas | first26=Michael R. | last27=Hall | first27=Jennifer R. | last28=Holman | first28=Matthew J. | last29=Koch | first29=David G. | last30=Latham | first30=David W. | display-authors=1 | journal=Nature | volume=470 | issue=7332 | pages=53–58 | year=2011 | arxiv=1102.0291 | bibcode=2011Natur.470...53L | doi=10.1038/nature09760 | pmid=21293371 }}</ref>

<ref name="Simbad">{{cite simbad | title=Kepler-11 | accessdate=2018-05-09 }}</ref>
}}
{{sklici|1}}

== Zunanje povezave ==
* [http://www.nasa.gov/mission_pages/kepler/news/new_planetary_system.html Official release: NASA's Kepler Spacecraft Discovers Extraordinary New Planetary System]
* [http://www.youtube.com/watch?v=c8Ipowj6X5s YouTube: animacija sestava]

{{Stars of Cygnus}}
{{nebo|19|48|27.62|+|41|54|32.9}}

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[[Kategorija:2011 v znanosti]]
[[Kategorija:Zunajosončni planeti]]
[[Kategorija:Zvezde glavnega niza tipa G]]
[[Kategorija:Labod (ozvezdje)]]
[[Kategorija:Telesa zanimiva za misijo Kepler|11]]
[[Kategorija:Spremenljivke s prehodi planetov]]