HD 63433 d

[4] It is believed that its dayside, always facing its star due to tidal locking, is completely molten and dominated by lava,[8][5] in addition to possibly having volcanic activity.

[9][10] Meanwhile, the night side of the planet could be as cold as Pluto, having glaciers of frozen nitrogen, depending on its composition.

[1][5][9] The small size, young age and the proximity of its star make HD 63433 an interesting planet for further exploration.

[4][11] The discovery of HD 63433 d is part of a project called TESS Hunt for Young and Maturing Exoplanets (THYME), which seeks to discover young transiting exoplanets in moving groups, stellar associations and open clusters.

[15] HD 63433 is part of the Ursa Major moving group, which makes its age estimated at 414 million years.