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Epic exoplanet 50 EP

TOI-904 c

RA 89.3713° · Dec -83.1297° · exoplanet

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Score breakdown

· 5 badges
50 pts · Epic
Epic 68 pts → Anomaly
  • In the habitable zone +30
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Found by TESS +4
Total score 50

18 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Sub-Neptune · +5
  • Multi-planet system · +6
  • Found by TESS · +4

Trivia

What makes it special

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

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 2.6 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 234.7 thousand years even at the Parker Solar Probe's 192 km/s.
  • At 10% light speed. ≈ 1503 years in a starship at a tenth of light speed.
  • Distance. 150 light-years from Earth.

Look-back time

  • Look-back time. The light you'd see left around the year 1876.

Saying hello

  • Say hello. A radio message and its reply would take 301 years round-trip.

Standing on it

  • A year here. A full year lasts just 84 Earth days.

By the numbers

  • Size. About 2.2× the width of Earth.
  • Volume. About 10.2 Earths could fit inside it.
  • Mass. About 5.3× the mass of Earth.
  • Your weight. You'd weigh about 1.1× your Earth weight standing here.
  • Temperature. A frigid -56°C — colder than dry ice.

How we found it

  • Discovery. Found by Transiting Exoplanet Survey Satellite (TESS) using the transit method.

Cosmic context

  • Crowded system. One of at least 2 planets orbiting its star.

Properties

density gcc
2.88
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
dist ly
150.3224
eq temp k
217.26
habitable zone
yes
insolation
0.5449
mass earth
5.34
name
TOI-904 c
orbital period days
83.9997
radius earth
2.167
sys num planets
2

About TOI-904 c

TOI-904 c is an epic exoplanet. It lies about 150.3 light-years from Earth, has an equilibrium temperature near 217 K, spans roughly 2.17 Earth radii and weighs about 5.34 Earth masses.

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

How to see it

Like any astronomical target, TOI-904 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-904 c is an epic exoplanet

TOI-904 c scores 50 points on Spacedle's rarity scale, which places it in the epic tier. Another 18 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, In the habitable zone, Sub-Neptune, 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.

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Sky imagery and survey data courtesy of Aladin Lite & CDS, Strasbourg. Object data from the NASA Exoplanet Archive, JPL Small-Body Database, and the ATNF Pulsar Catalogue.