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Rare exoplanet 45 EP

CoRoT-22 b

RA 280.6671° · Dec 6.2192° · exoplanet

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Score breakdown

· 6 badges
45 pts · Rare
Rare 50 pts → Epic
  • Puffy low-density world +12
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 45

5 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Neptune-like · +4
  • Tidally locked · +10
  • Puffy low-density world · +12
  • Orbits a Sun-like star · +8

Trivia

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 13.8 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Properties

density gcc
0.249
diameter km
62250.256
discovery facility
CoRoT
discovery method
Transit
discovery year
2014
dist ly
2045.5134
eccentricity
0.077
eq temp k
885
host star teff
5939
inclination
89.749
insolation
121.8837
mag
13.82
mass earth
12.2
name
CoRoT-22 b
orbital period days
9.756
radius earth
4.88
semi major au
0.092
spect
G3 V
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About CoRoT-22 b

CoRoT-22 b is a rare exoplanet. It lies about 2,045.5 light-years from Earth, shines at apparent magnitude 13.82, has spectral type G3 V and has an equilibrium temperature near 885 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 13.82, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, CoRoT-22 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 CoRoT-22 b is a rare exoplanet

CoRoT-22 b scores 45 points on Spacedle's rarity scale, which places it in the rare tier. Another 5 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Neptune-like, Tidally locked, Puffy low-density world and Orbits a Sun-like star — 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.