Size comparison of Enaiposha with Earth (left) and Neptune (right). The actual color of GJ 1214 b is not yet known.
Discovery[1]
Discovered by
David Charbonneau, et al.
Discovery site
Fred Lawrence Whipple Observatory
Discovery date
December 16, 2009
Detection method
Transit (MEarth Project)
Designations
Alternative names
Enaiposha[2]
Orbital characteristics[3]
Semi-major axis
0.01490±0.00026 AU
Eccentricity
<0.063
Orbital period (sidereal)
1.580404571(42) d[4]
Inclination
88.7°±0.1°
Semi-amplitude
14.36±0.53 m/s
Star
Orkaria
Physical characteristics
Mean radius
2.742+0.050 −0.053R🜨[3]
Mass
8.17±0.43 M🜨[3]
Mean density
2.20+0.17 −0.16 g/cm3[3]
Surface gravity
10.65+0.71 −0.67 m/s2[3] (1.09 g)
Escape velocity
19.31+0.53 −0.54 km/s[3]
Albedo
0.51±0.06 (Bond)[5]
Temperature
553±9 K (280 °C; 536 °F, dayside)[5] 437±19 K (164 °C; 327 °F, nightside)[5]
GJ 1214 b (sometimes Gliese 1214 b,[6] formally named Enaiposha[2]) is an exoplanet that orbits the star GJ 1214, and was discovered in December 2009. Its parent star is 48 light-years from the Sun, in the constellation Ophiuchus. As of 2017, GJ 1214 b is the most likely known candidate for being an ocean planet.[1][7] For that reason, scientists often call the planet a "waterworld".[8]
It is a super-Earth, meaning it is larger than Earth but is significantly smaller (in mass and radius) than the gas giants of the Solar System. After CoRoT-7b, it was the second super-Earth to have both its mass and radius measured[1] and is the first of a new class of planets with small size and relatively low density.[9]GJ 1214 b is also significant because its parent star is relatively near the Sun and because it transits that parent star, which allows the planet's atmosphere to be studied using spectroscopic methods.[1]
In December 2013, NASA reported that clouds may have been detected in the atmosphere of GJ 1214 b.[10][11][12][13]
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^"10 real planets that are stranger than science fiction". iflscience.com. Retrieved 2015-06-13.
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^Cite error: The named reference NASA-20131231 was invoked but never defined (see the help page).
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^Cite error: The named reference NAT-20140101c was invoked but never defined (see the help page).
GJ1214b (sometimes Gliese 1214b, formally named Enaiposha) is an exoplanet that orbits the star GJ1214, and was discovered in December 2009. Its parent...
GJ1214 (sometimes Gliese 1214) is a dim M4.5 red dwarf star in the constellation Ophiuchus with an apparent magnitude of 14.7. It is located at a distance...
pressure caused by gravity, as it was observed on exoplanets Gliese 436 b and GJ1214b. Water politics is politics affected by water and water resources....
Kepler-7b was announced, and, in December 2013, in the atmospheres of GJ 436 b and GJ1214b. Clouds play an important mythical or non-scientific role in various...
observations, the possibility might be inferred. For example, the density of GJ1214b would suggest that a large fraction of its mass is water and follow-up...
Formation of Alpha Centauri Star System, closest star to the Sun. GJ1214b, or Gliese 1214b, potential Earth-like planet, forms 8.2 billion years (5.6 Gya):...
creating an ocean planet with seas hundreds of kilometers deep such as GJ1214b or Kepler-22b may be. Maintenance of liquid surface water also requires...
include GJ1214b, Kepler-22b, Kepler-62e, Kepler-62f, and the planets of Kepler-11 and TRAPPIST-1. More recently, the exoplanets TOI-1452 b, Kepler-138c...
flight of the Boeing 787 Dreamliner. December 16 – Astronomers discover GJ1214b, the first-known exoplanet on which water could exist. December 25 – A...
Theoretical models have been used to predict with high probability that GJ1214b, detected by transit, is composed of exotic form of ice VII, making up...
MEarth-North, the telescopes in Chile are also sensitive to red light. GJ1214bGJ 1132 b LHS 1140 b "The MEarth Project: Searching for Habitable Exoplanets around...
drawback, with Gamma Cephei b being unconfirmed until 2002; while the PSR B1257+12 planets orbit a pulsar. This leaves 51 Pegasi b (discovered and confirmed...
Planet Searcher (HARPS) Super-Earth Habitability of red dwarf systems GJ 1132 bGJ1214b Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release...
was announced, and, in December 2013, also in the atmospheres of GJ 436 b and GJ1214b. Precipitation in the form of liquid (rain) or solid (snow) varies...
Virginis is the first star like the Sun to host the super-Earth planets. GJ1214b: On December 16, a super-Earth planet was discovered by transit. The determination...
stem lineage deep into Early Triassic". Proceedings of the Royal Society B: Biological Sciences. 278 (1708): 1107–1113. doi:10.1098/rspb.2010.1746. PMC 3049033...
detected in the atmospheres of several exoplanets; specifically, GJ 436 b and GJ1214b. Earlier, on 31 September, clouds were reported found, for the first...
claimed planets did exist, they would have very low densities. Gliese 436 GJ1214 Staff (2 August 2008). "Finding the constellation which contains given...
planetary transit observed (by already known exoplanet) was caused by HD 209458 b. The most massive transiting exoplanet is KELT-1b which masses 27.23 MJ (making...
so short that intelligent extraterrestrial life is not very likely. A and B type stars were surveyed for the research which involved NASA's Spitzer Space...
Way supernova visible to the unaided eye. In 2009 it was announced that GJ1214, a star in Ophiuchus, undergoes repeated, cyclical dimming with a period...
construction started on 14 March 2015. Gujarat State has the longest sea coast of 1214 km in India. Kandla Port is one of the largest ports serving Western India...
Pocock 1941, p. 456 Ewer 1973, p. 98 Kingdon 1989, p. 89 Pocock 1941, p. 1214 Rosevear 1974, pp. 114–16 Rosevear 1974, pp. 117–118 Heptner & Sludskii 2002...
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