K2-141b

K2-141b
Discovery
Discovery siteKepler Space Observatory
Discovery date2018
Transit
Orbital characteristics
0.00716 +0.00055
−0.00065 AU[1]
(1,071,000 +82,000
−97,000 km)
Eccentricity0[1]
0.2803244 ± 0.0000015 d (24,220.03 ± 0.13 s; 6.727786 ± 3.6×10−5 h)[1]
Inclination86.3 +2.7
−3.6[1]
StarK2-141
Physical characteristics
1.51±0.05[1] R🜨
Mass5.08±0.41[1] ME
Mean density
8.2 ± 1.1 g/cm3 (4.74 ± 0.64 oz/cu in) [1]
2.23 +0.35
−0.31 g
Albedo~0.28±0.07
Temperature2,039 K (1,766 °C) (equilibrium)[1]
3,270 K (3,000 °C) (day side)
73 K (−200.2 °C) (night side)[2]

K2-141b (also designated EPIC 246393474.01) is a massive rocky exoplanet orbiting extremely close to a K Type orange main-sequence star K2-141. The planet was first discovered by the Kepler space telescope during its K2 “Second Light” mission and later observed by the HARPS-N spectrograph. It is classified as an ultra-short period planet (USP) and is confirmed to be terrestrial in nature. Its high density implies a massive iron core taking up between 30% and 50% of the planet's total mass.[3]

  1. ^ a b c d e f g h "K2-141 b CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2018-03-05.
  2. ^ Cite error: The named reference academic.oup.com was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Malavolta2018 was invoked but never defined (see the help page).