GJ 251
GJ 251 is a star with planets in the constellation Gemini, about 18.2 light-years from Earth.
Facts
| Type | Star with planets |
|---|---|
| Constellation | Gemini |
| Position (J2000) | 6h 54m 48s, +33° 15′ |
| Distance | 18.2 light-years (its light set off about 18.2 years ago) |
| Brightness | magnitude 9.89 (smaller is brighter; the faintest stars the eye sees are about 6) |
Planets
2 known| Planet | Size (Earth = 1) | Year (days) | Habitable zone |
|---|---|---|---|
| GJ 251 b | 1.79 | 14.24 | no |
| GJ 251 c | 1.8 | 53.65 | yes (conservative) |
When and how to see it
GJ 251 is highest in the sky at midnight in January. From India (about 20° N) it climbs to about 77° above the horizon; from 50° N, to about 73°. To see it you need a small telescope.
Heights are worked out for India and for 50° N. Set your location in Settings to see them for where you are.
For tonight's best time from your own town, the darkness and the Moon, open it on the map and see its "Tonight from your location" card.
More in Gemini
Everything in Gemini · All 88 constellations · All sky objects
Data: · NASA Exoplanet Archive · Data sources & credits