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Epic exoplanet 53 EP

HD 12235 c

RA 30.0392° · Dec 3.0959° · exoplanet

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Score breakdown

· 7 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Its star is visible to the naked eye +12
  • Long-period world +10
  • Frozen world +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 53

25 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Frozen world · +8
  • Long-period world · +10
  • Multi-planet system · +6
  • Its star is visible to the naked eye · +12
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Frozen world. A deep-frozen world, too far from its star's warmth for anything to stay liquid.

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 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 5.9 you can see it with your own eyes from a dark site.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around October — that's when to go looking.

Properties

density gcc
8.82
diameter km
159452.5
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
103.596
eccentricity
0.174
eq temp k
82.22
host star teff
5986
inclination
47.738
insolation
0.0076
mag
5.8805
mass earth
3135.6951
name
HD 12235 c
orbital period days
36336.7068
radius earth
12.5
semi major au
22.21
sys num planets
2
sys num stars
1

About HD 12235 c

HD 12235 c is an epic exoplanet. It lies about 103.6 light-years from Earth, shines at apparent magnitude 5.88, has an equilibrium temperature near 82 K and spans roughly 12.5 Earth radii.

A deep-frozen world, too far from its star's warmth for anything to stay liquid.

How to see it

At apparent magnitude 5.88, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 12235 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 HD 12235 c is an epic exoplanet

HD 12235 c scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world, Multi-planet system, Its star is visible to the naked eye 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.