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Epic exoplanet 50 EP

DMPP-4 b

RA 293.5827° · Dec 51.2358° · exoplanet

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Score breakdown

· 6 badges
50 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Its star is visible to the naked eye +12
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Blasted by starlight +4
Total score 50

28 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Lava world · +14
  • Tidally locked · +10
  • Blasted by starlight · +4
  • Its star is visible to the naked eye · +12

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. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 5.7 you can see it with your own eyes from a dark site.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.52
diameter km
45029.386
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2023
dist ly
82.6101
eccentricity
0.063
eq temp k
1645.69
host star teff
6400
insolation
1222.8464
mag
5.7294
mass earth
12.2
name
DMPP-4 b
orbital period days
3.4982
radius earth
3.53
semi major au
0.0485
spect
F5-F8 V
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About DMPP-4 b

DMPP-4 b is an epic exoplanet. It lies about 82.6 light-years from Earth, shines at apparent magnitude 5.73, has spectral type F5-F8 V and has an equilibrium temperature near 1,646 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 5.73, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, DMPP-4 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 DMPP-4 b is an epic exoplanet

DMPP-4 b scores 50 points on Spacedle's rarity scale, which places it in the epic tier. Another 28 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 Its star is visible to the naked eye — 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.