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Baris 1: {{Infobox planet\|extrasolarplanet=yes\|name=K2-18b\|image=File:Esa-hubble-k2-18a impression.jpg\|caption=Ilustrasi K2-18b (kanan) yang mengorbit bintang katai merah K2-18 (kiri). Kandidat eksoplanet yang belum dikonfirmasi K2-18c ada di bagian tengah. <!-- DISCOVERY -->\|discovery_ref=<ref>{{Cite ~~name~~journal\|last=~~"Cloutier2017"~~Cloutier\|first=R.\|last2=Astudillo-Defru\|first2=N.\|last3=Doyon\|first3=R.\|last4=Bonfils\|first4=X.\|last5=Almenara\|first5=J.-M.\|last6=Benneke\|first6=B.\|last7=Bouchy\|first7=F.\|last8=Delfosse\|first8=X.\|last9=Ehrenreich\|first9=D.\|date=2017-12\|year=\|title=Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit\|url=http://www.aanda.org/10.1051/0004-6361/201731558\|journal=Astronomy & Astrophysics\|volume=608\|issue=\|pages=A35\|arxiv=1707.04292\|bibcode=2017A&A...608A..35C\|doi=10.1051/0004-6361/201731558\|issn=0004-6361}}</ref>\|discovery_site=[[Kepler (wahana antariksa)\|Observatorium Luar Angkasa Kepler]]\|discovered=2015\|discovery_method=[[Transit (astronomi)\|Transit]] <!-- DESIGNATIONS --> <!-- ORBITAL -->\|orbit_ref=<ref name=sarkis2018>{{cite journal \|doi=10.3847/1538-3881/aac108 \|title=The CARMENES Search for Exoplanets around M Dwarfs: A Low-mass Planet in the Temperate Zone of the Nearby K2-18 \|journal=The Astronomical Journal \|volume=155 \|issue=6 \|pages=257 \|year=2018 \|last1=Sarkis \|first1=Paula \|last2=Henning \|first2=Thomas \|last3=Kürster \|first3=Martin \|last4=Trifonov \|first4=Trifon \|last5=Zechmeister \|first5=Mathias \|last6=Tal-Or \|first6=Lev \|last7=Anglada-Escudé \|first7=Guillem \|last8=Hatzes \|first8=Artie P. \|last9=Lafarga \|first9=Marina \|last10=Dreizler \|first10=Stefan \|last11=Ribas \|first11=Ignasi \|last12=Caballero \|first12=José A. \|last13=Reiners \|first13=Ansgar \|last14=Mallonn \|first14=Matthias \|last15=Morales \|first15=Juan C. \|last16=Kaminski \|first16=Adrian \|last17=Aceituno \|first17=Jesús \|last18=Amado \|first18=Pedro J. \|last19=Béjar \|first19=Victor J. S. \|last20=Hagen \|first20=Hans-Jürgen \|last21=Jeffers \|first21=Sandra \|last22=Quirrenbach \|first22=Andreas \|last23=Launhardt \|first23=Ralf \|last24=Marvin \|first24=Christopher \|last25=Montes \|first25=David \|bibcode=2018AJ....155..257S \|arxiv=1805.00830 \| display-authors = 1 }}</ref>\|apsis=astron\|semimajor={{line-height\|2\|{{val\|0.1429\|+0.0060\|-0.0065\|ul=AU}}<br />{{convert\|0.1429\|AU\|km\|disp=out}}}}\|eccentricity={{val\|0.20\|0.08}}\|period={{val\|32.939623\|+0.000095\|-0.000100\|ul=d}}\|inclination={{val\|89.5785\|+0.0079\|-0.0088\|u=deg}}\|arg_peri={{val\|-0.10\|+0.81\|-0.59\|u=[[Radian\|rad]]}}\|semi-amplitude={{val\|3.55\|+0.57\|-0.58\|u=m/s}}\|star=[[K2-18]]

K2-18b: Perbedaan antara revisi