Star with planets
TRAPPIST-1
Also 2MASS J23062928-0502285
An ultracool dwarf star with seven Earth-sized, probably rocky planets, three in its habitable zone.
Measured
- Distance
- 41 light-years
- Constellation
- Aquarius
- Position (J2000)
- RA 23h 06m 30s, Dec −5.04°
How far, from the Sun
40.7 light-years. To cross it:
- Light40.7 years
- Voyager 1's speed723,000 years
- Driving at 100 km/h439 million years
Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
Facts
- It has seven known Earth-sized planets, the first such system known.
- All seven orbit closer than Mercury does to the Sun, with years of 1.5 to 19 days.
- Three of the planets lie in the star's habitable zone.
How it was found
- It is named for the TRAPPIST telescope in Chile, which found its first planets in 2016.
Where this comes from
- Gaia DR3 parallax 80.2123 ± 0.0716 mas, Gaia DR3 2635476908753563008 (Gaia Collaboration 2023, A&A 674, A1)
Every catalogue Ouranos draws is credited on the credits page.