Gliese 436

Gliese 436 is a red dwarf located 31.9 light-years (9.8 parsecs) away in the zodiac constellation of Leo.

The same model predicts that the outer atmosphere has an effective temperature of 3,480 K,[7] giving it the orange-red hue of an M-type star.

[3] Gliese 436 is a member of the "old-disk population" with velocity components in the galactic coordinate system of U=+44, V=−20 and W=+20 km/s.

[22] Further analysis showed that the transit length of the inner planet is not changing, a situation which rules out most possible configurations for this system.

[24] The existence of this "Gliese 436 c" was thus regarded as unlikely,[25] and the discovery was eventually retracted at the Transiting Planets conference in Boston, 2008.

[26] Despite the retraction, studies concluded that the possibility that there is an additional planet orbiting Gliese 436 remained plausible.

[28] In July 2012, NASA announced that astronomers at the University of Central Florida, using the Spitzer Space Telescope, strongly believed they had observed a second planet.

The astronomers also believed they had found some evidence for an additional planet candidate, UCF-1.02, which is of a similar size, though with only one detected transit its orbital period is unknown.