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{{Infobox planet
{{Planetbox begin
| name = K2-146b
| name = K2-146b
| image = K2-146b.jpg
| caption = Size comparison of the planet K2-146b (''artistic concept'') with Earth
<!-- DISCOVERY -->
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| discovery_site = [[Kepler (spacecraft)|Kepler Space Observatory]]
⚫
| discovery_method = Transit
<!-- DESIGNATIONS -->
<!-- ORBITAL -->
| apsis = astron
⚫
| star = [[K2-146]]
<!-- PHYS CHARS -->
<!-- ATMOSPHERE -->
<!-- NOTES -->
}}
}}
⚫
'''K2-146b''' is a [[Neptune]]-like [[exoplanet]] discovered in 2018 by the [[Kepler Space Telescope]] that orbits a low-mass [[Red dwarf|M-type star]] in the constellation [[Cancer (constellation)|Cancer]].<ref name=NasaExoplanetArchive>{{Cite web|url=https://exoplanets.nasa.gov/newworldsatlas/6167/|title=K2-146 b|publisher=Exoplanets Exploration|year=2018}}</ref><ref>{{Cite web|last1=Lazaro|first1=Enrico|title=Kepler Finds Twelve Exoplanets around Low-Mass Stars|url=http://www.sci-news.com/astronomy/kepler-twelve-exoplanets-low-mass-stars-05811.html|publisher=Sci-News.com|date=March 13, 2018}}</ref> Its host star, [[K2-146]], is orbited by another planet named K2-146c.<ref name="Lam2020"/> The planet orbits K2-146 at a distance of {{convert|0.0248|AU|km|abbr=on}},<ref name="Lam2020"/> fifteen times closer than [[Mercury (planet)|Mercury]] is to the [[Sun]] (0.3871 AU<ref name="nssdc"/>). Thus, it orbits very rapidly, with one year lasting just {{convert|2.64|d|h|abbr=off}},<ref name="Hamann2019"/> and is far too hot to be habitable, with an [[Planetary equilibrium temperature|equilibrium temperature]] of {{convert|534|K|C F}}.<ref name=Livingston2018/>
{{Planetbox star
⚫
| star = [[K2-146]]
| constell = [[Cancer (constellation)]]
| mass = Unknown
| radius = 0.0266 AU, 0.196 x [[Jupiter]]
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}}
{{Planetbox discovery
| discovery_year = 2018
⚫
| discovery_site = [[Kepler (spacecraft)|Kepler Space Observatory]]
⚫
| discovery_method = Transit
| discovery_status = Confirmed
}}
{{Planetbox end}}
⚫
K2-146 b is a [[Neptune]]-like [[exoplanet]] discovered in 2018 that orbits a M-type star and is found in the constellation [[Cancer (constellation)|Cancer]].<ref name=NasaExoplanetArchive>{{Cite web|url=https://exoplanets.nasa.gov/newworldsatlas/6167/|title=K2-146 b|publisher=Exoplanets Exploration|year=2018}}</ref> It was discovered by the [[Kepler Space Telescope]]. It orbits around one low-mass star.<ref>{{Cite web|last1=Lazaro|first1=Enrico|title=Kepler Finds Twelve Exoplanets around Low-Mass Stars|url=http://www.sci-news.com/astronomy/kepler-twelve-exoplanets-low-mass-stars-05811.html|publisher=Sci-News.com|date=March 13, 2018}}</ref> It is also the only exoplanet to orbit around [[K2-146]].<ref name=NasaExoplanetArchive/><ref>{{Cite web|url=http://exoplorer.org/en/exoplanets/k2-146-b|title=K2-146 b|publisher=[[Exoplanet Data Explorer]]|year=2018}}</ref> Namely, it orbits closer to its sun than [[Mercury (planet)|Mercury]] does, and that is being 97% closer to its sun than Earth is to ours, it orbits very rapidly and well inside what would be regarded as the 'habitable zone’.<ref name=NasaExoplanetArchive/>


== References ==
== References ==
{{reflist}}
{{reflist|refs=

<ref name="Lam2020">{{cite journal | display-authors=1 | last1=Lam | first1=Kristine W. F. | last2=Korth | first2=Judith | last3=Masuda | first3=Kento | last4=Csizmadia | first4=Szilárd | last5=Eigmüller | first5=Philipp | last6=Stefánsson | first6=Gumundur Kári | last7=Endl | first7=Michael | last8=Albrecht | first8=Simon | last9=Robertson | first9=Paul | last10=Luque | first10=Rafael | last11=Livingston | first11=John H. | last12=Hirano | first12=Teruyuki | last13=Sobrino | first13=Roi Alonso | last14=Barragán | first14=Oscar | last15=Cabrera | first15=Juan | last16=Carleo | first16=Ilaria | last17=Chaushev | first17=Alexander | last18=Cochran | first18=William D. | last19=Dai | first19=Fei | last20=Leon | first20=Jerome de | last21=Deeg | first21=Hans J. | last22=Erikson | first22=Anders | last23=Esposito | first23=Massimiliano | last24=Fridlund | first24=Malcolm | last25=Fukui | first25=Akihiko | last26=Gandolfi | first26=Davide | last27=Georgieva | first27=Iskra | last28=Cuesta | first28=Lucá Gonzalez | last29=Grziwa | first29=Sascha | last30=Guenther | first30=Eike W. | last31=Hatzes | first31=Artie P. | last32=Hidalgo | first32=Diego | last33=Hjorth | first33=Maria | last34=Kabath | first34=Petr | last35=Knudstrup | first35=Emil | last36=Lund | first36=Mikkel N. | last37=Mahadevan | first37=Suvrath | last38=Mathur | first38=Savita | last39=Rodríguez | first39=Pilar Montañes | last40=Murgas | first40=Felipe | last41=Narita | first41=Norio | last42=Nespral | first42=David | last43=Niraula | first43=Prajwal | last44=Palle | first44=Enric | last45=Pätzold | first45=Martin | last46=Persson | first46=Carina M. | last47=Prieto-Arranz | first47=Jorge | last48=Rauer | first48=Heike | last49=Redfield | first49=Seth | last50=Ribas | first50=Ignasi | last51=Skarka | first51=Marek | last52=Smith | first52=Alexis M. S. | last53=Subjak | first53=Jan | last54=Eylen | first54=Vincent Van | title=It Takes Two Planets in Resonance to Tango around K2-146 | journal=The Astronomical Journal | volume=159 | issue=3 | date=2020-03-01 | issn=0004-6256 | doi=10.3847/1538-3881/ab66c9 | doi-access=free | page=120| arxiv=1907.11141 }}</ref>

<ref name="Livingston2018">{{cite journal | display-authors=1 | last1=Livingston | first1=John H. | last2=Crossfield | first2=Ian J. M. | last3=Petigura | first3=Erik A. | last4=Gonzales | first4=Erica J. | last5=Ciardi | first5=David R. | last6=Beichman | first6=Charles A. | last7=Christiansen | first7=Jessie L. | last8=Dressing | first8=Courtney D. | last9=Henning | first9=Thomas | last10=Howard | first10=Andrew W. | last11=Isaacson | first11=Howard | last12=Fulton | first12=Benjamin J. | last13=Kosiarek | first13=Molly | last14=Schlieder | first14=Joshua E. | last15=Sinukoff | first15=Evan | last16=Tamura | first16=Motohide | title=Sixty Validated Planets from K2 Campaigns 5–8 | journal=The Astronomical Journal | volume=156 | issue=6 | date=2018-12-01 | issn=0004-6256 | doi=10.3847/1538-3881/aae778 | doi-access=free | page=277| arxiv=1810.04074 }}</ref>

<ref name="Hamann2019">{{cite journal | last1=Hamann | first1=Aaron | last2=Montet | first2=Benjamin T. | last3=Fabrycky | first3=Daniel C. | last4=Agol | first4=Eric | last5=Kruse | first5=Ethan | title=K2-146: Discovery of Planet c, Precise Masses from Transit Timing, and Observed Precession | journal=The Astronomical Journal | volume=158 | issue=3 | date=2019-09-01 | issn=0004-6256 | doi=10.3847/1538-3881/ab32e3 | doi-access=free | page=133| arxiv=1907.10620 }}</ref>

<ref name="nssdc">{{Cite web |last=Williams |first=D.R. |title=Mercury Fact Sheet |url=http://nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact.html |access-date=2024-08-02 |publisher=[[NASA Goddard Space Flight Center]]}}</ref>
⚫
}}


{{2018 in space}}
{{2018 in space}}

Latest revision as of 17:39, 5 November 2024

K2-146b
Size comparison of the planet K2-146b (artistic concept) with Earth
Discovery
Discovery siteKepler Space Observatory
Transit
Orbital characteristics
StarK2-146

K2-146b is a Neptune-like exoplanet discovered in 2018 by the Kepler Space Telescope that orbits a low-mass M-type star in the constellation Cancer.[1][2] Its host star, K2-146, is orbited by another planet named K2-146c.[3] The planet orbits K2-146 at a distance of 0.0248 AU (3,710,000 km),[3] fifteen times closer than Mercury is to the Sun (0.3871 AU[4]). Thus, it orbits very rapidly, with one year lasting just 2.64 days (63 hours),[5] and is far too hot to be habitable, with an equilibrium temperature of 534 K (261 °C; 502 °F).[6]

References

[edit]
  1. ^ "K2-146 b". Exoplanets Exploration. 2018.
  2. ^ Lazaro, Enrico (March 13, 2018). "Kepler Finds Twelve Exoplanets around Low-Mass Stars". Sci-News.com.
  3. ^ a b Lam, Kristine W. F.; et al. (2020-03-01). "It Takes Two Planets in Resonance to Tango around K2-146". The Astronomical Journal. 159 (3): 120. arXiv:1907.11141. doi:10.3847/1538-3881/ab66c9. ISSN 0004-6256.
  4. ^ Williams, D.R. "Mercury Fact Sheet". NASA Goddard Space Flight Center. Retrieved 2024-08-02.
  5. ^ Hamann, Aaron; Montet, Benjamin T.; Fabrycky, Daniel C.; Agol, Eric; Kruse, Ethan (2019-09-01). "K2-146: Discovery of Planet c, Precise Masses from Transit Timing, and Observed Precession". The Astronomical Journal. 158 (3): 133. arXiv:1907.10620. doi:10.3847/1538-3881/ab32e3. ISSN 0004-6256.
  6. ^ Livingston, John H.; et al. (2018-12-01). "Sixty Validated Planets from K2 Campaigns 5–8". The Astronomical Journal. 156 (6): 277. arXiv:1810.04074. doi:10.3847/1538-3881/aae778. ISSN 0004-6256.
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