About K2-47 b
K2-47 b is a common exoplanet. It lies about 1,141.2 light-years from Earth, has an equilibrium temperature near 504 K, spans roughly 1.89 Earth radii and weighs about 4.23 Earth masses.
About 1.9× the width of Earth.
Common exoplanet 23 EP
K2-47 b
RA 168.5826° · Dec 2.7806° · exoplanet
Score breakdown
· 3 badgesCommon 24 pts → Uncommon
- Distant (>1000 ly) +10
- Super-Earth +8
- Confirmed exoplanet +5
Total score 23
1 more point to reach Uncommon.
Badges
- Confirmed exoplanet · +5
- Super-Earth · +8
- 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. ≈ 20.1 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 1.8 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 11.4 thousand years in a starship at a tenth of light speed.
- Distance. 1141 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 885.
Saying hello
- Say hello. A radio message and its reply would take 2282 years round-trip.
Standing on it
- A year here. A full year lasts just 31.6 Earth days.
By the numbers
- Size. About 1.9× the width of Earth.
- Volume. About 6.8 Earths could fit inside it.
- Mass. About 4.2× the mass of Earth.
- Your weight. You'd weigh about 1.2× your Earth weight standing here.
- Temperature. A scorching 231°C on average.
How we found it
- Discovery. Found by K2 using the transit method.
Properties
- density gcc
- 3.44
- discovery facility
- K2
- discovery method
- Transit
- dist ly
- 1141.1579
- eq temp k
- 503.72
- insolation
- 10.7
- mass earth
- 4.23
- name
- K2-47 b
- orbital period days
- 31.6372
- radius earth
- 1.89
- sys num planets
- 1
How to see it
Like any astronomical target, K2-47 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 K2-47 b is a common exoplanet
K2-47 b scores 23 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Super-Earth 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.