Kepler-11e
Kepler Mission)[1] | |
Orbital characteristics | |
---|---|
0.194 AU (29,000,000 km) | |
31.99590[2] d | |
Inclination | 88.8[2] |
Star | Kepler-11 (KOI-157) |
Physical characteristics | |
Mean radius | 4.52 (± 0.43)[3] R🜨 |
Mass | 8.4 +2.5 −1.9[3] ME |
Mean density | 0.5 (± 0.2)[3] g cm−3 |
Temperature | 617 K (344 °C; 651 °F)[4] |
Kepler-11e is an
Name and discovery
At the time when Kepler-11 was first noted as a host to a potential transit event, the star was given the designation
Follow-up confirmation observations were made by the Keck 1 telescope at the W. M. Keck Observatory in Hawaii, the Hale and Shane telescopes in California, the Harlan J. Smith and Hobby–Eberly telescopes in west Texas, the Nordic Optical Telescope in the Canary Islands, and by telescopes at the WIYN (including MMT) and Whipple observatories in Arizona. The Spitzer Space Telescope was also used. Kepler-11's planetary system became the first discovered extrasolar system with more than three transiting planets, as well as the most compact and flattest system yet discovered, according to NASA.[6] The planets of Kepler-11, including Kepler-11e, were announced jointly at a press conference on February 2, 2011. The findings were published in the journal Nature on February 3.[1]
Host star
Kepler-11 is a
Characteristics
Kepler-11e, which formed within the first few million years of the star system's formation,
Because it isn't as close to its star as its sister planets Kepler-11b and Kepler-11c, the Kepler team suggests that its light density may come from a large hydrogen and helium atmosphere that has not been blown away by the stellar wind.[1] In fact, formation models indicate that the planet has a gaseous envelope, somewhat less massive than 20% of it total mass, which account for ≈60% of its radius (or ≈90% of its volume).[11]
References
- ^ a b c d e f Denise Chow (2 February 2011). "Astronomers Find 6-Pack of Planets in Alien Solar System". Space.com. Retrieved 22 March 2011.
- ^ a b c d e f "Kepler Discoveries". Ames Research Center. NASA. 2011. Archived from the original on 2010-05-27. Retrieved 23 March 2011.
- ^ S2CID 4388001.
- ^ a b Jean Schneider (2011). "Notes for star Kepler-11". Extrasolar Planets Encyclopaedia. Archived from the original on 7 February 2011. Retrieved 23 March 2011.
- ^ a b Fraser Cain (June 30, 2008). "Density of Saturn". Universe Today. Retrieved 2 April 2011.
- ^ a b Michael Mewinney and Rachel Hoover (2 February 2011). "NASA's Kepler Spacecraft Discovers Extraordinary New Planetary System". Ames Research Center. NASA. Retrieved 21 March 2011.
- doi:10.1086/428383.
- ISBN 978-0-8165-2945-2.
- ^ Denise Chow (4 February 2011). "A tourist's guide to the new Kepler-11 planet system". Space section. NBC News. Retrieved 13 March 2011.
- ^ David Williams (2001). "Mercury Fact Sheet". Goddard Space Flight Center. NASA. Retrieved 23 March 2011.
- S2CID 119203398.