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Epic exoplanet 53 EP

HAT-P-22 b

RA 155.6815° · Dec 50.1287° · exoplanet

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Score breakdown

· 6 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Two suns in its sky +12
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 53

25 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Lava world · +14
  • Tidally locked · +10
  • Orbits a Sun-like star · +8
  • 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

  • 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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

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 9.8 you'll want a small backyard telescope.
  • 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 February — that's when to go looking.

Could we get there?

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

Properties

density gcc
2.14
diameter km
164431.8827
discovery facility
HATNet
discovery method
Transit
discovery year
2010
dist ly
266.6805
eccentricity
0.02
eq temp k
1463
host star teff
5302
inclination
86.9
insolation
325.569
mag
9.763
mass earth
785.0401
multi star system
yes
name
HAT-P-22 b
orbital period days
3.2122
radius earth
12.8903
semi major au
0.0414
spect
G5 V
sys num planets
1
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About HAT-P-22 b

HAT-P-22 b is an epic exoplanet. It lies about 266.7 light-years from Earth, shines at apparent magnitude 9.76, has spectral type G5 V and has an equilibrium temperature near 1,463 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 9.76, a small backyard telescope will bring it into view.

Like any astronomical target, HAT-P-22 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 HAT-P-22 b is an epic exoplanet

HAT-P-22 b scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Lava world, Tidally locked, Orbits a Sun-like 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.