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Uncommon exoplanet 27 EP

TOI-2202 c

RA 51.2284° · Dec -73.9575° · exoplanet

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Score breakdown

· 4 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Puffy low-density world +12
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 27

7 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Puffy low-density world · +12
  • Multi-planet system · +6

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.
  • Crowded system. One of at least 2 planets orbiting its star.

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 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around November — that's when to go looking.

Properties

density gcc
0.268
diameter km
170933.08
discovery facility
Multiple Observatories
discovery method
Transit Timing Variations
discovery year
2021
dist ly
769.5096
eccentricity
0.0622
eq temp k
560.61
host star teff
5144
inclination
84.7
insolation
16.431
mag
13.004
mass earth
117.2787
name
TOI-2202 c
orbital period days
24.6744
radius earth
13.4
semi major au
0.1554
spect
K8 V
sys num planets
2
sys num stars
1

About TOI-2202 c

TOI-2202 c is an uncommon exoplanet. It lies about 769.5 light-years from Earth, shines at apparent magnitude 13, has spectral type K8 V and has an equilibrium temperature near 561 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, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, TOI-2202 c 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 TOI-2202 c is an uncommon exoplanet

TOI-2202 c scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Puffy low-density world 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.