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Rare exoplanet 43 EP

Qatar-7 b

RA 358.5151° · Dec 37.0218° · exoplanet

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Score breakdown

· 6 badges
43 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Tidally locked +10
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Blasted by starlight +4
Total score 43

7 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Lava world · +14
  • Tidally locked · +10
  • Blasted by starlight · +4

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

  • 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

  • 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. 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 13.1 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • 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 September — that's when to go looking.

Properties

density gcc
0.502
diameter km
243073.2179
discovery facility
Qatar
discovery method
Transit
discovery year
2019
dist ly
2302.5994
eccentricity
0
eq temp k
2053
host star teff
6387
inclination
89
insolation
2886.2922
mag
13.134
mass earth
597.5204
name
Qatar-7 b
orbital period days
2.032
radius earth
19.0553
semi major au
0.0352
spect
F4 V
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About Qatar-7 b

Qatar-7 b is a rare exoplanet. It lies about 2,302.6 light-years from Earth, shines at apparent magnitude 13.13, has spectral type F4 V and has an equilibrium temperature near 2,053 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 13.13, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Qatar-7 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 Qatar-7 b is a rare exoplanet

Qatar-7 b scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Lava world, Tidally locked 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.