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HIP 116454 b or K2-2b is an exoplanet orbiting the star HIP 116454, 55 parsecs (180 ly) from Earth toward the constellation Pisces. It is 32,000 kilometres (20,000 mi) in diameter and 12 times as massive as Earth. It was discovered by the NASA Kepler spacecraft, and is the first exoplanet discovered during Kepler's K2 mission. The discovery was announced on December 18, 2014. Template:J does not have a normal Kepler designation due to not being located in the original Kepler field.

Template:J 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 Template:J was detected, requiring follow-up radial velocity measurements by the HARPS-N spectrograph and photometric measurements by the Canadian MOST satellite.

In February of 2015, it received proper Kepler designation of K2-2b.

Physical characteristics of Template:J are expected to be similar to Kepler-68b, being somewhere between super-Earth and mini-Neptune.

References

1. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=HIP+116454+b&type=CONFIRMED_PLANET
2. Overbye, Dennis (December 19, 2014). "Kepler Spacecraft Finds New 'Super-Earth' 180 Light-Years Away". The New York Times. Retrieved December 19, 2014.
3. Wall, Mike (December 18, 2014). "NASA's Kepler Spacecraft Finds 1st Alien Planet of New Mission". Yahoo! News. Retrieved December 19, 2014.
4. ^ 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.
5. ^ Vanderburg, Andrew; Montet, Benjamin T.; Johnson, John Asher; Buchhave, Lars A.; Zeng, Li; et al. (December 2014). "Characterizing K2 Planet Discoveries: A super-Earth transiting the bright K-dwarf HIP 116454". arXiv:1412.5674 . {{cite arXiv}}: Unknown parameter |bibcode= ignored (help); Unknown parameter |version= ignored (help)
6. Shore, Randy (December 18, 2014). "UBC astronomers help spot new 'waterworld' planet in our (galactic) neighbourhood". The Province. Retrieved December 18, 2014.
7. http://exoplanetarchive.ipac.caltech.edu/docs/K2Numbers.html

External links

• HIP 116454 at SIMBAD
• HIP 116454 at Extrasolar Planets Encyclopaedia

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