Kepler-9b

Kepler-9b
Size comparison of Kepler-9b (left) with Jupiter (right)
Discovery[1][2]
Discovered byKepler Mission team
Discovery siteKepler space telescope
Discovery date26 August 2010
Transit
Designations
KOI-377.01[3]
Orbital characteristics
0.140 ± 0.001 AU (20,940,000 ± 150,000 km)
Eccentricity0
19.24 d
Inclination88.55
StarKepler-9
Physical characteristics
0.842 ± 0.069 RJ
Mass43.5+2.7
−3.3
[4] ME
Mean density
0.4±0.1 g cm−3

Kepler-9b is one of the first planets discovered outside the solar system (exoplanets) by NASA's Kepler Mission.[1] It revolves around the star Kepler-9 within the constellation Lyra. Kepler-9b is the largest of three planets detected in the Kepler system by transit method; its mass is roughly half that of the planet Saturn, and it is the largest planet in its system. Kepler-9b and Kepler-9c display a phenomenon called orbital resonance, in which gravitational pull from each planet alters and stabilizes the orbit of the other. The planet's discovery was announced on August 26, 2010.

  1. ^ a b Cite error: The named reference Holman2010 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference JPL2714 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Hadden2017 was invoked but never defined (see the help page).