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Rare exoplanet 45 EP

TOI-2977 b

RA 143.9265° · Dec -60.3575° · exoplanet

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Score breakdown

· 6 badges
45 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by TESS +4
Total score 45

5 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Lava world · +14
  • Tidally locked · +10
  • Found by TESS · +4
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

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.

Find it in the sky

  • How to spot it. At magnitude 12.6 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 February — that's when to go looking.

Standing on it

  • A year here. A full year lasts just 2.4 Earth days.
  • Eternal day. One side bakes in endless daylight while the other freezes in permanent night, with a ring of perpetual twilight in between.

Properties

density gcc
1.28
diameter km
167863.2155
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2023
eccentricity
0
eq temp k
1544
host star teff
5691
inclination
89.19
insolation
947.8
mag
12.6334
mass earth
533.9517
name
TOI-2977 b
orbital period days
2.3506
radius earth
13.1593
semi major au
0.0339
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-2977 b

TOI-2977 b is a rare exoplanet. It shines at apparent magnitude 12.63, has an equilibrium temperature near 1,544 K, spans roughly 13.16 Earth radii and weighs about 533.95 Earth masses.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 12.63, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, TOI-2977 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 TOI-2977 b is a rare exoplanet

TOI-2977 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, Gas giant, Lava world, Tidally locked, Found by TESS 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.