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Uncommon exoplanet 27 EP

HD 192263 b

RA 303.4991° · Dec -0.8658° · exoplanet

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Score breakdown

· 3 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Found before the year 2000 +18
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 27

7 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Found before the year 2000 · +18

Trivia

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. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

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.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.342
diameter km
181138.04
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
1999
dist ly
64.0437
eccentricity
0.05
eq temp k
486
host star teff
4976
insolation
15.0597
mag
7.79
mass earth
177.9848
name
HD 192263 b
orbital period days
24.3556
radius earth
14.2
semi major au
0.15
spect
K2 V
sys num planets
1
sys num stars
1

About HD 192263 b

HD 192263 b is an uncommon exoplanet. It lies about 64 light-years from Earth, shines at apparent magnitude 7.79, has spectral type K2 V and has an equilibrium temperature near 486 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 7.79, it is an easy target for binoculars.

Like any astronomical target, HD 192263 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 192263 b is an uncommon exoplanet

HD 192263 b scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Found before the year 2000 — 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.