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Epic exoplanet 65 EP

HD 135344 A b

RA 228.9538° · Dec -37.1489° · exoplanet

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Score breakdown

· 6 badges
65 pts · Epic
Epic 78 pts → Anomaly
  • Directly imaged +16
  • Lava world +14
  • Orbits a hot blue-white star +14
  • Two suns in its sky +12
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 65

13 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Lava world · +14
  • Directly imaged · +16
  • Orbits a hot blue-white star · +14
  • Two suns in its sky · +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

  • What it is made of. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

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 7.8 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 8.1 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
4.07
diameter km
207326.7994
discovery facility
Paranal Observatory
discovery method
Imaging
discovery year
2025
dist ly
461.8206
eccentricity
0.5
eq temp k
1585
host star teff
9540
inclination
73.6
insolation
0.061
mag
7.765
mass earth
3178.2841
multi star system
yes
name
HD 135344 A b
radius earth
16.253
semi major au
16.5
spect
A0 V
sys num planets
1
sys num stars
2

About HD 135344 A b

HD 135344 A b is an epic exoplanet. It lies about 461.8 light-years from Earth, shines at apparent magnitude 7.76, has spectral type A0 V and has an equilibrium temperature near 1,585 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 7.76, it is an easy target for binoculars.

Like any astronomical target, HD 135344 A 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 135344 A b is an epic exoplanet

HD 135344 A b scores 65 points on Spacedle's rarity scale, which places it in the epic tier. Another 13 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Lava world, Directly imaged, Orbits a hot blue-white star and Two suns in its sky — 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.