HIP 116454 b

HIP 116454 b
Discovery
Discovered by	Vanderburg, et al.
Discovery site	Kepler
Discovery date	February 2014
Detection method	Transit
Orbital characteristics
	Epoch 2456907.89 (J2000)
Semi-major axis	0.0906±0.0049 AU
Eccentricity	0.205±0.072
Orbital period (sidereal)	9.1205±0.0005 d
Inclination	88.43±0.40
Argument of periastron	−59.1±16.7
Star	HIP 116454
Physical characteristics
Mean radius	2.53±0.18 REarth
Mass	11.82±1.33 MEarth
Mean density	4.17±1.08 g cm−3
Temperature	690 ± 14 K (416.9 ± 14.0 °C; 782.3 ± 25.2 °F)

HIP 116454 b, or K2-2 b,^[2] is an exoplanet orbiting the star , 62 parsecs (201 ly) from Earth toward the constellation Pisces. It is 32,000 kilometres (20,000 mi) in diameter and 12 times as massive as Earth.^[3]^[4] It was discovered by the NASA Kepler spacecraft, and is the first exoplanet discovered during Kepler's K2 mission.^[5] The discovery was announced on December 18, 2014. HIP 116454 b does not have a normal Kepler designation due to not being located in the original Kepler field.^[5]

HIP 116454 b was discovered in a Kepler engineering data set which was collected in preparation of the first full K2 campaign. Unlike most other Kepler planets, only a single transit event of HIP 116454 b was detected, requiring follow-up radial velocity measurements by the HARPS-N spectrograph and photometric measurements by the Canadian MOST satellite.^[1]^[6]

Physical characteristics of HIP 116454 b are expected to be similar to Kepler-68b, being somewhere between a super-Earth and a mini-Neptune.^[1]

References[]

^ ^a ^b ^c ^d Vanderburg, Andrew; et al. (February 2015). "Characterizing K2 Planet Discoveries: A super-Earth transiting the bright K-dwarf HIP 116454". The Astrophysical Journal. 800 (1). 59. arXiv:1412.5674. Bibcode:2015ApJ...800...59V. doi:10.1088/0004-637X/800/1/59.
^ "HIP 116454 b". NASA Exoplanet Archive. Retrieved February 7, 2015.
^ Overbye, Dennis (December 19, 2014). "Kepler Spacecraft Finds New 'Super-Earth' 180 Light-Years Away". The New York Times. Retrieved December 19, 2014.
^ Wall, Mike (December 18, 2014). "NASA's Kepler Spacecraft Finds 1st Alien Planet of New Mission". Yahoo! News. Retrieved December 19, 2014.
^ ^a ^b Chou, Felicia; Johnson, Michele (December 18, 2014). "NASA's Kepler Reborn, Makes First Exoplanet Find of New Mission". NASA. Release 14-335. Retrieved December 19, 2014.
^ Shore, Randy (December 18, 2014). "UBC astronomers help spot new 'waterworld' planet in our (galactic) neighbourhood". The Province. Retrieved December 18, 2014.

External links[]

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[Vanderburg2015-1] Vanderburg, Andrew; et al. (February 2015). "Characterizing K2 Planet Discoveries: A super-Earth transiting the bright K-dwarf HIP 116454". The Astrophysical Journal. 800 (1). 59. arXiv:1412.5674. Bibcode:2015ApJ...800...59V. doi:10.1088/0004-637X/800/1/59.

[nasaexoarchive-2] "HIP 116454 b". NASA Exoplanet Archive. Retrieved February 7, 2015.

[nytimes20141219-3] Overbye, Dennis (December 19, 2014). "Kepler Spacecraft Finds New 'Super-Earth' 180 Light-Years Away". The New York Times. Retrieved December 19, 2014.

[yahoo20141218-4] Wall, Mike (December 18, 2014). "NASA's Kepler Spacecraft Finds 1st Alien Planet of New Mission". Yahoo! News. Retrieved December 19, 2014.

[NASA-20141218-FC-5] Chou, Felicia; Johnson, Michele (December 18, 2014). "NASA's Kepler Reborn, Makes First Exoplanet Find of New Mission". NASA. Release 14-335. Retrieved December 19, 2014.

[province20141218-6] Shore, Randy (December 18, 2014). "UBC astronomers help spot new 'waterworld' planet in our (galactic) neighbourhood". The Province. Retrieved December 18, 2014.

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