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Epic exoplanet 54 EP

TOI-178 f

RA 7.3020° · Dec -30.4541° · exoplanet

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Score breakdown

· 4 badges
54 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Richly packed system +14
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 54

24 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Sub-Neptune · +5
  • Richly packed system · +14

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

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.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.
  • Crowded system. One of at least 6 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 12 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.

Properties

density gcc
2.2165
diameter km
30831.7354
discovery facility
Multiple Observatories
discovery method
Transit
discovery year
2021
dist ly
204.4966
eccentricity
0.0004
eq temp k
521
habitable zone
yes
host star teff
4316
inclination
88.723
insolation
0.6071
mag
11.955
mass earth
5.63
name
TOI-178 f
orbital period days
15.2333
radius earth
2.417
semi major au
0.1039
spect
K
sys num planets
6
sys num stars
1

About TOI-178 f

TOI-178 f is an epic exoplanet. It lies about 204.5 light-years from Earth, shines at apparent magnitude 11.96, has spectral type K and has an equilibrium temperature near 521 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 11.96, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-178 f 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-178 f is an epic exoplanet

TOI-178 f scores 54 points on Spacedle's rarity scale, which places it in the epic tier. Another 24 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Sub-Neptune and Richly packed system — 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.