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Rare exoplanet 38 EP

TIC 434398831 b

RA 93.9593° · Dec 16.0238° · exoplanet

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Score breakdown

· 6 badges
38 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
  • Found by TESS +4
Total score 38

12 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Tidally locked · +10
  • Multi-planet system · +6
  • Found by TESS · +4
  • 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. 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 11.7 you'll want a small backyard telescope.
  • 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 December — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.54
diameter km
44774.262
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2025
dist ly
707.7944
eccentricity
0.04
eq temp k
1250
host star teff
5638
inclination
88.2
insolation
333.6313
mag
11.682
mass earth
12.1
name
TIC 434398831 b
orbital period days
3.6855
radius earth
3.51
semi major au
0.0464
spect
G4 V
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TIC 434398831 b

TIC 434398831 b is a rare exoplanet. It lies about 707.8 light-years from Earth, shines at apparent magnitude 11.68, has spectral type G4 V and has an equilibrium temperature near 1,250 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 11.68, a small backyard telescope will bring it into view.

Like any astronomical target, TIC 434398831 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 TIC 434398831 b is a rare exoplanet

TIC 434398831 b scores 38 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Sub-Neptune, Tidally locked, Multi-planet system, 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.