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Common exoplanet 15 EP

HD 47366 c

RA 99.4200° · Dec -12.9857° · exoplanet

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Score breakdown

· 3 badges
15 pts · Common
Common 22 pts → Uncommon
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 15

7 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Multi-planet system · +6

Trivia

What it actually is

  • 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.
  • Crowded system. One of at least 2 planets orbiting its star.

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 6.1 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 December — 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. ≈ 4.8 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.08
diameter km
172208.7
discovery facility
Okayama Astrophysical Observatory
discovery method
Radial Velocity
discovery year
2016
dist ly
275.1295
eccentricity
0.161
eq temp k
467.37
host star teff
4866
insolation
7.7091
mag
6.1115
mass earth
483.7348
name
HD 47366 c
orbital period days
677.53
radius earth
13.5
semi major au
1.84
spect
K1 III
sys num planets
2
sys num stars
1

About HD 47366 c

HD 47366 c is a common exoplanet. It lies about 275.1 light-years from Earth, shines at apparent magnitude 6.11, has spectral type K1 III and has an equilibrium temperature near 467 K.

Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

How to see it

At apparent magnitude 6.11, it is an easy target for binoculars.

Like any astronomical target, HD 47366 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 47366 c is a common exoplanet

HD 47366 c scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Multi-planet system — 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.