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Rare exoplanet 34 EP

TOI-2015 c

RA 232.1327° · Dec 27.3611° · exoplanet

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Score breakdown

· 5 badges
34 pts · Rare
Rare 50 pts → Epic
  • Tidally locked +10
  • Orbits a red dwarf +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 red dwarf · +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 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 16.1 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.95
diameter km
37375.666
discovery facility
Multiple Observatories
discovery method
Transit Timing Variations
discovery year
2025
dist ly
154.4166
eccentricity
0.0003
eq temp k
448
host star teff
3297
inclination
85.7
insolation
6.68
mag
16.11
mass earth
8.91
name
TOI-2015 c
orbital period days
5.5828
radius earth
2.93
semi major au
0.0412
spect
M4 +/- 0.5
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-2015 c

TOI-2015 c is a rare exoplanet. It lies about 154.4 light-years from Earth, shines at apparent magnitude 16.11, has spectral type M4 +/- 0.5 and has an equilibrium temperature near 448 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 16.11, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, TOI-2015 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-2015 c is a rare exoplanet

TOI-2015 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 red dwarf — 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.