Rare exoplanet 45 EP
51 Peg b
RA 344.3675° · Dec 20.7691° · exoplanet
Score breakdown
· 5 badgesRare 46 pts → Epic
- Lava world +14
- Puffy low-density world +12
- Hot Jupiter +10
- Confirmed exoplanet +5
- Gas giant +4
Total score 45
1 more point to reach Epic.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Hot Jupiter · +10
- Lava world · +14
- Puffy low-density world · +12
Trivia
What makes it special
- Lava world. Its surface is likely an ocean of molten rock.
- Cotton-candy planet. So low-density it would float on water.
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 886.2 thousand years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 78.7 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 504 years in a starship at a tenth of light speed.
- Distance. 50.4 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1976.
Saying hello
- Say hello. A radio message and its reply would take 101 years round-trip.
Standing on it
- A year here. A full year lasts just 4.2 Earth days.
By the numbers
- Size. About 14.3× the width of Earth.
- Volume. About 2924 Earths could fit inside it.
- Mass. Roughly 146× Earth's mass — about 0.5 Jupiters.
- Your weight. You'd weigh about 0.7× your Earth weight standing here.
- Density. Less dense than water — drop it in a big enough ocean and it would float.
- Temperature. Around 1038°C — hotter than a self-cleaning oven.
How we found it
- Discovery. Found by Haute-Provence Observatory using the radial velocity method.
Properties
- density gcc
- 0.275
- discovery facility
- Haute-Provence Observatory
- discovery method
- Radial Velocity
- dist ly
- 50.4283
- eccentricity
- 0.013
- eq temp k
- 1311.39
- insolation
- 492.82
- mass earth
- 146.2018
- name
- 51 Peg b
- orbital period days
- 4.2308
- radius earth
- 14.3
- sys num planets
- 1