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Rare exoplanet 46 EP

HD 24085 b

RA 56.2563° · Dec -70.0245° · exoplanet

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Score breakdown

· 6 badges
46 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Blasted by starlight +4
Total score 46

4 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Lava world · +14
  • Tidally locked · +10
  • Blasted by starlight · +4
  • Orbits a Sun-like star · +8

Trivia

What makes it special

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

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.

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 7.6 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around November — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.57
diameter km
44136.452
discovery facility
Las Campanas Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
179.0609
eccentricity
0.22
eq temp k
1875.43
host star teff
6034
insolation
2061.4187
mag
7.57
mass earth
11.8
name
HD 24085 b
orbital period days
2.0455
radius earth
3.46
semi major au
0.034
spect
G0 V
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HD 24085 b

HD 24085 b is a rare exoplanet. It lies about 179.1 light-years from Earth, shines at apparent magnitude 7.57, has spectral type G0 V and has an equilibrium temperature near 1,875 K.

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

How to see it

At apparent magnitude 7.57, it is an easy target for binoculars.

Like any astronomical target, HD 24085 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 HD 24085 b is a rare exoplanet

HD 24085 b scores 46 points on Spacedle's rarity scale, which places it in the rare tier. Another 4 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Sub-Neptune, Lava world, Tidally locked, Blasted by starlight 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.