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Rare exoplanet 34 EP

TOI-1117 c

RA 273.6021° · Dec -66.4200° · exoplanet

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Score breakdown

· 5 badges
34 pts · Rare
Rare 50 pts → Epic
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 34

16 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Tidally locked · +10
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8

Trivia

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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
  • Crowded system. One of at least 3 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 11 you'll want a small backyard telescope.
  • 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 June — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

density gcc
1.96
diameter km
37120.542
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2025
dist ly
546.6309
eccentricity
0
eq temp k
1210
host star teff
5635
insolation
355
mag
11.016
mass earth
8.78
name
TOI-1117 c
orbital period days
4.579
radius earth
2.91
semi major au
0.0534
spect
G5 V
sys num planets
3
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-1117 c

TOI-1117 c is a rare exoplanet. It lies about 546.6 light-years from Earth, shines at apparent magnitude 11.02, has spectral type G5 V and has an equilibrium temperature near 1,210 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 11.02, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-1117 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-1117 c is a rare exoplanet

TOI-1117 c scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 16 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Sub-Neptune, Tidally locked, Multi-planet system 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.