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Epic exoplanet 73 EP

HD 137496 b

RA 231.7421° · Dec -16.5090° · exoplanet

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Score breakdown

· 8 badges
73 pts · Epic
Epic 78 pts → Anomaly
  • Denser than iron +18
  • Lava world +14
  • Tidally locked +10
  • Super-Earth +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Blasted by starlight +4
Total score 73

5 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
  • 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.

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 9.9 you'll want a small backyard telescope.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.

Properties

density gcc
10.49
diameter km
16710.622
discovery facility
K2
discovery method
Transit
discovery year
2021
dist ly
506.5757
eccentricity
0
eq temp k
2130
host star teff
5799
inclination
85.8
insolation
3114.3366
mag
9.899
mass earth
4.04
name
HD 137496 b
orbital period days
1.6212
radius earth
1.31
semi major au
0.0273
spect
G
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HD 137496 b

HD 137496 b is an epic exoplanet. It lies about 506.6 light-years from Earth, shines at apparent magnitude 9.9, has spectral type G and has an equilibrium temperature near 2,130 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 9.9, a small backyard telescope will bring it into view.

Like any astronomical target, HD 137496 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 137496 b is an epic exoplanet

HD 137496 b scores 73 points on Spacedle's rarity scale, which places it in the epic tier. Another 5 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 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.