GJ 436 b is a Neptune-sized exoplanet that orbits a M-type star. Its mass is 22.1 Earths, it takes 2.6 days to complete one orbit of its star, and is 0.0291 AU from its star. This unusual world is only 33 light-years away. Its discovery was announced in 2004.

Basic data :
ICRS coord. (ep=J2000) : 11 42 11.0933874353 +26 42 23.658083337 (Optical) [ 0.0601 0.0583 90 ] A 2018yCat.1345....0G
FK4 coord. (ep=B1950 eq=1950) : 11 39 31.1731306569 +26 59 42.927317638 [ 0.0601 0.0583 90 ]
Gal coord. (ep=J2000) : 210.5418752929038 +74.5688839469252 [ 0.0601 0.0583 90 ]
Proper motions mas/yr : 895.047 -814.030 [0.128 0.123 90] A 2018yCat.1345....0G
Parallaxes (mas): 102.5015 [0.0936] A 2018yCat.1345....0G