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Epic exoplanet 53 EP

HD 185269 b

RA 294.2988° · Dec 28.4995° · 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.

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 6.7 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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 July — that's when to go looking.

Properties

density gcc
0.671
diameter km
176035.56
discovery facility
Lick Observatory
discovery method
Radial Velocity
discovery year
2006
dist ly
169.574
eccentricity
0.229
eq temp k
1455.61
host star teff
5923
insolation
832.9821
mag
6.6797
mass earth
321.0083
multi star system
yes
name
HD 185269 b
orbital period days
6.8378
radius earth
13.8
semi major au
0.077
spect
G0 IV
sys num planets
1
sys num stars
3
tidally locked
yes
tidally locked inferred
yes

Nearby objects

About HD 185269 b

HD 185269 b is an epic exoplanet. It lies about 169.6 light-years from Earth, shines at apparent magnitude 6.68, has spectral type G0 IV and has an equilibrium temperature near 1,456 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 6.68, it is an easy target for binoculars.

Like any astronomical target, HD 185269 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 185269 b is an epic exoplanet

HD 185269 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.