Kepler-10b

Kepler-10b
	Size comparison of Kepler-10b with Earth
Discovery
Discovered by	Batalha et al.
Discovery date	January 10, 2011
Detection method	Transit (Kepler Mission)
Orbital characteristics
Semi-major axis	0.01684 +0.00032; −0.00034 AU
Eccentricity	0
Orbital period (sidereal)	0.837495 d; 20.0999 h
Inclination	84.4
Semi-amplitude	3.3 +0.8; −1.0
Star	Kepler-10
Physical characteristics
Mean radius	1.47+0.03; −0.02 R🜨
Mass	3.72±0.42 ME
Mean density	6.46±0.73 g/cm3
Surface gravity	15 m/s2 (49 ft/s2)
Albedo	0.5
Temperature	1,833 K (1,560 °C; 2,840 °F) (day side) ; 50 K (−223.2 °C; −369.7 °F) (night side)

Kepler-10b is the first confirmed terrestrial planet to have been discovered outside the Solar System by the Kepler Space Telescope.^[6] Discovered after several months of data collection during the course of the NASA-directed Kepler Mission, which aims to discover Earth-like planets crossing in front of their host stars, the planet's discovery was announced on January 10, 2011. Kepler-10b has a mass of 3.72±0.42 Earth masses and a radius of 1.47 Earth radii. However, it lies extremely close to its star, Kepler-10, and as a result is too hot to support life as we know it. Its existence was confirmed using measurements from the W.M. Keck Observatory in Hawaii.

^ ^a ^b ^c ^d ^e ^f Cite error: The named reference Batalha2011 was invoked but never defined (see the help page).
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^ Rouan, D.; Deeg, H. J.; Demangeon, O.; Samuel, B.; Cavarroc, C.; Fegley, B.; Léger, A. (2011). "The orbital phases and secondary transit of Kepler-10b - A physical interpretation based on the Lava-ocean planet model". The Astrophysical Journal. 741 (2): L30. arXiv:1109.2768. Bibcode:2011ApJ...741L..30R. doi:10.1088/2041-8205/741/2/L30.
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[5] Rouan, D.; Deeg, H. J.; Demangeon, O.; Samuel, B.; Cavarroc, C.; Fegley, B.; Léger, A. (2011). "The orbital phases and secondary transit of Kepler-10b - A physical interpretation based on the Lava-ocean planet model". The Astrophysical Journal. 741 (2): L30. arXiv:1109.2768. Bibcode:2011ApJ...741L..30R. doi:10.1088/2041-8205/741/2/L30.

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Discovery^[1]
Size comparison of Kepler-10b with Earth
Discovered by	Batalha et al.
Discovery date	January 10, 2011
Detection method	Transit (Kepler Mission)
Orbital characteristics
Semi-major axis	0.01684 ^+0.00032 _−0.00034^[1] AU
Eccentricity	0^[1]
Orbital period (sidereal)	0.837495^[1] d 20.0999 h
Inclination	84.4^[1]
Semi-amplitude	3.3 ^+0.8 _−1.0^[1]
Star	Kepler-10^[2]
Physical characteristics
Mean radius	1.47^+0.03 _−0.02^[3] `R`_🜨
Mass	3.72±0.42^[4] `M`_E
Mean density	6.46±0.73 g/cm³^[4]
Surface gravity	15 m/s² (49 ft/s²)^[3]
Albedo	0.5
Temperature	1,833 K (1,560 °C; 2,840 °F) (day side) 50 K (−223.2 °C; −369.7 °F) (night side)^[5]