About Kepler-1731 b
Kepler-1731 b is a trash exoplanet. It lies about 554.3 light-years from Earth, has an equilibrium temperature near 486 K, spans roughly 2.93 Earth radii and weighs about 8.92 Earth masses.
About 2.9× the width of Earth.
Trash exoplanet 13 EP
Kepler-1731 b
RA 291.2544° · Dec 36.7434° · exoplanet
Score breakdown
· 3 badgesTrash 15 pts → Common
- Confirmed exoplanet +5
- Sub-Neptune +5
- Found by Kepler +3
Total score 13
2 more points to reach Common.
Badges
- Confirmed exoplanet · +5
- Sub-Neptune · +5
- Found by Kepler · +3
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 9.7 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 865.5 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 5543 years in a starship at a tenth of light speed.
- Distance. 554 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1472.
Saying hello
- Say hello. A radio message and its reply would take 1109 years round-trip.
Standing on it
- A year here. A full year lasts just 21.8 Earth days.
By the numbers
- Size. About 2.9× the width of Earth.
- Volume. About 25.2 Earths could fit inside it.
- Mass. About 8.9× the mass of Earth.
- Your weight. You'd weigh about 1.0× your Earth weight standing here.
- Temperature. A scorching 213°C on average.
How we found it
- Discovery. Found by Kepler using the transit method.
Properties
- density gcc
- 1.94
- discovery facility
- Kepler
- discovery method
- Transit
- dist ly
- 554.2956
- eccentricity
- 0
- eq temp k
- 486
- insolation
- 13.3
- mass earth
- 8.92
- name
- Kepler-1731 b
- orbital period days
- 21.7613
- radius earth
- 2.933
- sys num planets
- 1
How to see it
Like any astronomical target, Kepler-1731 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 Kepler-1731 b is a trash exoplanet
Kepler-1731 b scores 13 points on Spacedle's rarity scale, which places it in the trash tier. Another 2 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Sub-Neptune and Found by Kepler — 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.