About K2-136 b
K2-136 b is a rare exoplanet. It lies about 193.2 light-years from Earth, has an equilibrium temperature near 610 K, spans roughly 1.01 Earth radii and weighs about 4.3 Earth masses.
Packed denser than solid iron.
Rare exoplanet 45 EP
K2-136 b
RA 67.4129° · Dec 22.8826° · exoplanet
Score breakdown
· 4 badgesRare 46 pts → Epic
- Denser than iron +18
- Earth-sized +16
- Multi-planet system +6
- Confirmed exoplanet +5
Total score 45
1 more point to reach Epic.
Badges
- Confirmed exoplanet · +5
- Earth-sized · +16
- Denser than iron · +18
- Multi-planet system · +6
Trivia
What makes it special
- Heavyweight. Packed denser than solid iron.
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 3.4 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 301.7 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 1932 years in a starship at a tenth of light speed.
- Distance. 193 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1833.
Saying hello
- Say hello. A radio message and its reply would take 386 years round-trip.
Standing on it
- A year here. A full year lasts just 8 Earth days.
By the numbers
- Size. Almost exactly Earth-sized.
- Mass. About 4.3× the mass of Earth.
- Your weight. You'd weigh about 4.2× your Earth weight standing here.
- Density. Denser than solid iron.
- Temperature. A scorching 337°C on average.
How we found it
- Discovery. Found by K2 using the transit method.
Cosmic context
- Crowded system. One of at least 3 planets orbiting its star.
Properties
- density gcc
- 24
- discovery facility
- K2
- discovery method
- Transit
- dist ly
- 193.2389
- eccentricity
- 0.14
- eq temp k
- 610
- insolation
- 33.5
- mass earth
- 4.3
- name
- K2-136 b
- orbital period days
- 7.9752
- radius earth
- 1.014
- sys num planets
- 3
How to see it
Like any astronomical target, K2-136 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 K2-136 b is a rare exoplanet
K2-136 b scores 45 points on Spacedle's rarity scale, which places it in the rare tier. Another 1 point would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, Earth-sized, Denser than iron and Multi-planet system — 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.