Kepler-87c

{{Infobox planet

| name = Kepler-87c

| discoverer = Ofir et al.

| discovered = 8 October 2013

| discovery_method = Transit (Kepler Mission)

| apsis = astron

| semimajor = {{convert|0.664|AU|km|abbr=on}}

| eccentricity = 0.039

| period = 191 d

| inclination = 89.588

| star = Kepler-87 (KOI-1574)

| mean_radius = 6.14±0.29 {{Earth radius|link=y}}

| mass = 6.4±0.8 {{Earth mass|sym=y|link=y}}

| density = {{convert|0.152|g/cm3|lk=on|abbr=on}}

| single_temperature = {{convert|403|K|C F}} {{cite web |title=The Extrasolar Planet Encyclopaedia — Kepler-87c |url=https://exoplanet.eu/catalog/kepler_87_c--1233/ |work=Extrasolar Planets Encyclopaedia |access-date=10 September 2023}}

}}

Kepler-87c is a planet orbiting Kepler-87, a star slightly more massive than the Sun and nearing the end of its main-sequence period.

Characteristics

Despite being larger than Neptune, Kepler-87c is only about 6.4 times more massive than Earth. This means that its density is only 0.152 g/cm³. This makes it the first Super-puff, a planet with such low density. Its equilibrium temperature is 130 °C.

References

{{reflist|refs=

{{cite journal | title=An independent planet search in the Kepler dataset. II. An extremely low-density super-Earth mass planet around Kepler-87 | url=https://www.aanda.org/articles/aa/full_html/2014/01/aa20935-12/aa20935-12.html | last1=Ofir | first1=Aviv | last2=Dreizler | first2=Stefan | last3=Zechmeister | first3=Mathias | last4=Husser | first4=Tim-Oliver | display-authors=1 | journal=Astronomy and Astrophysics | volume=561 | at=A103 | year=2014 | arxiv=1310.2064 | bibcode=2014A&A...561A.103O | doi=10.1051/0004-6361/201220935 | s2cid=118691606 }}

}}

External links

[http://beyondearthlyskies.blogspot.com/2013/10/an-extremely-low-density-super-earth.html Beyond Earthly Skies - An Extremely Low Density Super-Earth]

Category:Exoplanets discovered in 2013

Category:Transiting exoplanets

Category:Exoplanets discovered by the Kepler space telescope

Category:Cygnus (constellation)