K2-3d

K2-3d
Size comparison between the
Earth and K2-3d.
Discovery[1]
Discovery siteKepler Space Observatory
Discovery date2015
Transit
Orbital characteristics[2]
0.2014+0.0034
−0.0033 AU
Eccentricity0.091+0.120
−0.064
44.55603+0.00013
−0.00012 d
Inclination89.788°+0.033°
−0.029°[3]
Semi-amplitude<0.39 m/s[3]
StarK2-3
Physical characteristics[2]
1.458+0.056
−0.051 R🜨
Mass<1.6 M🜨[3]
Mean density
<2.1 g/cm3[3]
Temperature305.2+3.1
−3.2 K (32.1 °C; 89.7 °F, equilibrium)

K2-3d, also known as EPIC 201367065 d, is a confirmed exoplanet of probable mini-Neptune type orbiting the red dwarf star K2-3, and the outermost of three such planets discovered in the system. It is located 143 light-years (44 parsecs) away from Earth in the constellation of Leo.[4][5] The exoplanet was found by using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured. It was the first planet in the Kepler "Second Light" mission to receive the letter "d" designation for a planet. Its discovery was announced in January 2015.[1]

  1. ^ a b Cite error: The named reference Crossfield2015 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Diamond-Lowe2022 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Bonomo2023 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference NasaExoplanetArchive was invoked but never defined (see the help page).
  5. ^ "The Extrasolar Planet Encyclopaedia — K2-3 d". Extrasolar Planets Encyclopaedia.