Star with planets
51 Pegasi
Also Helvetios · HD 217014
A Sun-like star whose planet, found in 1995, was the first known around a star like the Sun.
Measured
- Distance
- 51 light-years
- Constellation
- Pegasus
- Position (J2000)
- RA 22h 57m 28s, Dec +20.77°
How far, from the Sun
50.6 light-years. To cross it:
- Light50.6 years
- Voyager 1's speed900,000 years
- Driving at 100 km/h547 million years
Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
Facts
- Its planet 51 Pegasi b was the first found orbiting a Sun-like star, in 1995.
- The planet circles its star every 4.23 days, with at least about half Jupiter's mass.
How it was found
- Michel Mayor and Didier Queloz won the 2019 Nobel Prize in Physics for the discovery.
Where this comes from
- Gaia DR3 parallax 64.4048 ± 0.0771 mas, Gaia DR3 2835207319109249920 (Gaia Collaboration 2023, A&A 674, A1)
Every catalogue Ouranos draws is credited on the credits page.