← Back to dex
Epic exoplanet 63 EP

GQ Lup b

RA 237.3004° · Dec -35.6515° · exoplanet

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 5 badges
63 pts · Epic
Epic 78 pts → Anomaly
  • Ultra-hot Jupiter +26
  • Directly imaged +16
  • Orbits beyond Neptune's distance +12
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 63

15 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Ultra-hot Jupiter · +26
  • Directly imaged · +16
  • Orbits beyond Neptune's distance · +12

Trivia

What makes it special

  • Ultra-hot Jupiter. So hot that iron vaporises on the dayside, blows around to the night side and rains back down as molten metal.

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

What it actually is

  • 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 11.6 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.
  • 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.

Properties

density gcc
0.921
diameter km
428608.32
discovery facility
Paranal Observatory
discovery method
Imaging
discovery year
2004
dist ly
493.0468
eq temp k
2650
host star teff
4360
insolation
0.0001
mag
11.593
mass earth
6356
name
GQ Lup b
radius earth
33.6
semi major au
100
spect
K7e V
sys num planets
1
sys num stars
1

About GQ Lup b

GQ Lup b is an epic exoplanet. It lies about 493 light-years from Earth, shines at apparent magnitude 11.59, has spectral type K7e V and has an equilibrium temperature near 2,650 K.

So hot that iron vaporises on the dayside, blows around to the night side and rains back down as molten metal.

How to see it

At apparent magnitude 11.59, a small backyard telescope will bring it into view.

Like any astronomical target, GQ Lup 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 GQ Lup b is an epic exoplanet

GQ Lup b scores 63 points on Spacedle's rarity scale, which places it in the epic tier. Another 15 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Ultra-hot Jupiter, Directly imaged and Orbits beyond Neptune's distance — 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.