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Uncommon exoplanet 28 EP

TOI-201 c

RA 87.4018° · Dec -54.9104° · exoplanet

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Score breakdown

· 5 badges
28 pts · Uncommon
Uncommon 34 pts → Rare
  • Eccentric orbit +9
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by TESS +4
Total score 28

6 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Eccentric orbit · +9
  • Multi-planet system · +6
  • Found by TESS · +4

Trivia

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

What it actually is

  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • 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 9.1 you'll want a small backyard telescope.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around December — that's when to go looking.

Could we get there?

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

Properties

density gcc
24
diameter km
132664.48
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit Timing Variations
discovery year
2025
dist ly
371.2471
eccentricity
0.651
eq temp k
169.58
host star teff
6423
inclination
89.92
insolation
0.1367
mag
9.07
mass earth
4990
name
TOI-201 c
orbital period days
2890
radius earth
10.4
semi major au
4.37
spect
F
sys num planets
3
sys num stars
1

About TOI-201 c

TOI-201 c is an uncommon exoplanet. It lies about 371.2 light-years from Earth, shines at apparent magnitude 9.07, has spectral type F and has an equilibrium temperature near 170 K.

Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

How to see it

At apparent magnitude 9.07, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-201 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-201 c is an uncommon exoplanet

TOI-201 c scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Eccentric orbit, Multi-planet system and Found by TESS — 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.