About K2-253 b
K2-253 b is an uncommon exoplanet. It lies about 2,859 light-years from Earth, has an equilibrium temperature near 1,238 K, spans roughly 12.67 Earth radii and completes an orbit every 4 days.
About 12.7× the width of Earth.
Uncommon exoplanet 29 EP
K2-253 b
RA 186.0853° · Dec -6.3790° · exoplanet
Score breakdown
· 4 badgesUncommon 33 pts → Rare
- Hot Jupiter +10
- Distant (>1000 ly) +10
- Confirmed exoplanet +5
- Gas giant +4
Total score 29
4 more points to reach Rare.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Hot Jupiter · +10
- Distant (>1000 ly) · +10
Trivia
Could we get there?
- Verdict. Impossible with our current technology — and the next millennium of it.
Getting there
- Aboard Voyager 1. ≈ 50.2 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 4.5 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 28.6 thousand years in a starship at a tenth of light speed.
- Distance. 2859 light-years from Earth.
Look-back time
- Look-back time. Its light left before the last ice age ended.
Saying hello
- Say hello. A radio message and its reply would take 5718 years round-trip.
Standing on it
- A year here. A full year lasts just 4 Earth days.
By the numbers
- Size. About 12.7× the width of Earth.
- Volume. About 2034 Earths could fit inside it.
- Temperature. Around 965°C — hotter than a self-cleaning oven.
How we found it
- Discovery. Found by K2 using the transit method.
Properties
- discovery facility
- K2
- discovery method
- Transit
- dist ly
- 2858.9693
- eq temp k
- 1238
- insolation
- 365.8185
- name
- K2-253 b
- orbital period days
- 4.0017
- radius earth
- 12.67
- sys num planets
- 1
How to see it
Like any astronomical target, K2-253 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 K2-253 b is an uncommon exoplanet
K2-253 b scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.
That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter and Distant (>1000 ly) — 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.