About WASP-139 b
WASP-139 b is a trash exoplanet. It lies about 693 light-years from Earth, has an equilibrium temperature near 910 K, spans roughly 8.97 Earth radii and weighs about 37.19 Earth masses.
About 9× the width of Earth.
Trash exoplanet 9 EP
WASP-139 b
RA 49.5622° · Dec -41.3020° · exoplanet
Score breakdown
· 2 badgesTrash 15 pts → Common
- Confirmed exoplanet +5
- Gas giant +4
Total score 9
6 more points to reach Common.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 12.2 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 1.1 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 6930 years in a starship at a tenth of light speed.
- Distance. 693 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1333.
Saying hello
- Say hello. A radio message and its reply would take 1386 years round-trip.
Standing on it
- A year here. A full year lasts just 5.9 Earth days.
By the numbers
- Size. About 9× the width of Earth.
- Volume. About 721 Earths could fit inside it.
- Mass. About 37.2× the mass of Earth.
- Your weight. You'd weigh about 0.5× your Earth weight standing here.
- Density. Less dense than water — drop it in a big enough ocean and it would float.
- Temperature. Around 637°C — hotter than a self-cleaning oven.
How we found it
- Discovery. Found by SuperWASP-South using the transit method.
Properties
- density gcc
- 0.31
- discovery facility
- SuperWASP-South
- discovery method
- Transit
- dist ly
- 692.9902
- eccentricity
- 0
- eq temp k
- 910
- insolation
- 120.7076
- mass earth
- 37.1861
- name
- WASP-139 b
- orbital period days
- 5.9243
- radius earth
- 8.9672
- sys num planets
- 1
How to see it
Like any astronomical target, WASP-139 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 WASP-139 b is a trash exoplanet
WASP-139 b scores 9 points on Spacedle's rarity scale, which places it in the trash tier. Another 6 points would lift it into a rarer tier.
That score comes from 2 science badges — Confirmed exoplanet and Gas giant — 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.