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Epic exoplanet 69 EP

HD 25463 c

RA 60.7483° · Dec 9.2078° · exoplanet

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Score breakdown

· 8 badges
69 pts · Epic
Epic 78 pts → Anomaly
  • Denser than iron +18
  • Lava world +14
  • Tidally locked +10
  • Super-Earth +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Blasted by starlight +4
  • Found by TESS +4
Total score 69

9 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Lava world · +14
  • Tidally locked · +10
  • Denser than iron · +18
  • Multi-planet system · +6
  • Blasted by starlight · +4
  • Found by TESS · +4

Trivia

What makes it special

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

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

  • 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. 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 6.9 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.

Properties

density gcc
9.09
diameter km
17393.7105
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2023
dist ly
148.7862
eccentricity
0
eq temp k
1585.57
host star teff
6353
insolation
1413.5
mag
6.9113
mass earth
4.3
name
HD 25463 c
orbital period days
3.044
radius earth
1.3635
semi major au
0.0443
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HD 25463 c

HD 25463 c is an epic exoplanet. It lies about 148.8 light-years from Earth, shines at apparent magnitude 6.91, has an equilibrium temperature near 1,586 K and spans roughly 1.36 Earth radii.

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

How to see it

At apparent magnitude 6.91, it is an easy target for binoculars.

Like any astronomical target, HD 25463 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 25463 c is an epic exoplanet

HD 25463 c scores 69 points on Spacedle's rarity scale, which places it in the epic tier. Another 9 points would lift it into a rarer tier.

That score comes from 8 science badges — Confirmed exoplanet, Super-Earth, Lava world, Tidally locked, Denser than iron, Multi-planet system, Blasted by starlight 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.