About AF Lep b
AF Lep b is an epic exoplanet. It lies about 87.6 light-years from Earth, has an equilibrium temperature near 1,400 K, spans roughly 13 Earth radii and weighs about 1,147.36 Earth masses.
Its surface is likely an ocean of molten rock.
Epic exoplanet 59 EP
AF Lep b
RA 81.7699° · Dec -11.9012° · exoplanet
Score breakdown
· 6 badgesEpic 68 pts → Anomaly
- Directly imaged +16
- Lava world +14
- Hot Jupiter +10
- Long-period world +10
- Confirmed exoplanet +5
- Gas giant +4
Total score 59
9 more points to reach Anomaly.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Hot Jupiter · +10
- Lava world · +14
- Long-period world · +10
- Directly imaged · +16
Trivia
What makes it special
- Lava world. Its surface is likely an ocean of molten rock.
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 1.5 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 136.8 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 876 years in a starship at a tenth of light speed.
- Distance. 87.6 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1938.
Saying hello
- Say hello. A radio message and its reply would take 175 years round-trip.
Standing on it
- A year here. A full year lasts about 24.4 Earth years.
By the numbers
- Size. About 13× the width of Earth.
- Volume. About 2197 Earths could fit inside it.
- Mass. Roughly 1147× Earth's mass — about 3.6 Jupiters.
- Your weight. You'd weigh about 6.8× your Earth weight standing here.
- Temperature. Around 1127°C — hotter than a self-cleaning oven.
How we found it
- Discovery. Found by Paranal Observatory using the imaging method.
Properties
- density gcc
- 2.87
- discovery facility
- Paranal Observatory
- discovery method
- Imaging
- dist ly
- 87.5938
- eccentricity
- 0.015
- eq temp k
- 1400
- insolation
- 0.0241
- mass earth
- 1147.3605
- name
- AF Lep b
- orbital period days
- 8905
- radius earth
- 13
- sys num planets
- 1
How to see it
Like any astronomical target, AF Lep b is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.
Why AF Lep b is an epic exoplanet
AF Lep b scores 59 points on Spacedle's rarity scale, which places it in the epic tier. Another 9 points would lift it into a rarer tier.
That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world, Long-period world and Directly imaged — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.