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Uncommon exoplanet 31 EP

HD 202206 c

RA 318.7405° · Dec -20.7897° · exoplanet

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Score breakdown

· 4 badges
31 pts · Uncommon
Uncommon 34 pts → Rare
  • Circumbinary (orbits both stars) +14
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 31

3 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Circumbinary (orbits both stars) · +14
  • Orbits a Sun-like star · +8

Trivia

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

What it actually is

  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

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

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 2.6 million years at Voyager 1's speed (17 km/s).

Properties

circumbinary
yes
density gcc
17.2
diameter km
155625.64
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2004
dist ly
149.9225
eccentricity
0.22
eq temp k
182.65
host star teff
5766
inclination
7.7
insolation
0.1866
mag
8.08
mass earth
5689.157
name
HD 202206 c
orbital period days
1260
radius earth
12.2
semi major au
2.41
spect
G6 V
sys num planets
1
sys num stars
2

About HD 202206 c

HD 202206 c is an uncommon exoplanet. It lies about 149.9 light-years from Earth, shines at apparent magnitude 8.08, has spectral type G6 V and has an equilibrium temperature near 183 K.

Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

How to see it

At apparent magnitude 8.08, it is an easy target for binoculars.

Like any astronomical target, HD 202206 c 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 202206 c is an uncommon exoplanet

HD 202206 c scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Circumbinary (orbits both stars) and Orbits a Sun-like star — 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.