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Epic exoplanet 59 EP

HD 137496 b

RA 231.7421° · Dec -16.5090° · exoplanet

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Score breakdown

· 6 badges
59 pts · Epic
Epic 68 pts → Anomaly
  • Denser than iron +18
  • Lava world +14
  • Super-Earth +8
  • Blasted by starlight +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 59

9 more points to reach Anomaly.

Badges

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

Trivia

What makes it special

  • Lava world. Its surface is likely an ocean of molten rock.
  • Heavyweight. Packed denser than solid iron.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 8.9 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 791 thousand years even at the Parker Solar Probe's 192 km/s.
  • At 10% light speed. ≈ 5066 years in a starship at a tenth of light speed.
  • Distance. 507 light-years from Earth.

Look-back time

  • Look-back time. The light you'd see left around the year 1519.

Saying hello

  • Say hello. A radio message and its reply would take 1013 years round-trip.

Standing on it

  • A year here. A full year lasts just 1.6 Earth days.

By the numbers

  • Size. About 1.3× the width of Earth.
  • Mass. About 4× the mass of Earth.
  • Your weight. You'd weigh about 2.4× your Earth weight standing here.
  • Density. Denser than solid iron.
  • Temperature. Around 2130 K — hot enough to vaporise iron.

How we found it

  • Discovery. Found by K2 using the transit method.

Cosmic context

  • Crowded system. One of at least 2 planets orbiting its star.

Properties

density gcc
10.49
discovery facility
K2
discovery method
Transit
dist ly
506.5757
eccentricity
0
eq temp k
2130
insolation
3114.3366
mass earth
4.04
name
HD 137496 b
orbital period days
1.6212
radius earth
1.31
sys num planets
2

About HD 137496 b

HD 137496 b is an epic exoplanet. It lies about 506.6 light-years from Earth, has an equilibrium temperature near 2,130 K, spans roughly 1.31 Earth radii and weighs about 4.04 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

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 59 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 6 science badges — Confirmed exoplanet, Super-Earth, Lava world, Denser than iron, Multi-planet system and Blasted by starlight — 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.

spacedle A daily roll through the real universe. © 2026 spacedle. Buy me a coffee

Sky imagery and survey data courtesy of Aladin Lite & CDS, Strasbourg. Object data from the NASA Exoplanet Archive, JPL Small-Body Database, and the ATNF Pulsar Catalogue.