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Epic exoplanet 50 EP

HD 83443 c

RA 144.2994° · Dec -43.2727° · exoplanet

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Score breakdown

· 7 badges
50 pts · Epic
Epic 78 pts → Anomaly
  • Long-period world +10
  • Eccentric orbit +9
  • Frozen world +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 50

28 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Frozen world · +8
  • Long-period world · +10
  • Eccentric orbit · +9
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Frozen world. A deep-frozen world, too far from its star's warmth for anything to stay liquid.

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 8.2 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 February — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.04
diameter km
173484.32
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
133.3949
eccentricity
0.76
eq temp k
89.95
host star teff
5442
insolation
0.0123
mag
8.23
mass earth
476.7426
name
HD 83443 c
orbital period days
8241
radius earth
13.6
semi major au
8
spect
K0 V
sys num planets
2
sys num stars
1

About HD 83443 c

HD 83443 c is an epic exoplanet. It lies about 133.4 light-years from Earth, shines at apparent magnitude 8.23, has spectral type K0 V and has an equilibrium temperature near 90 K.

A deep-frozen world, too far from its star's warmth for anything to stay liquid.

How to see it

At apparent magnitude 8.23, it is an easy target for binoculars.

Like any astronomical target, HD 83443 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 83443 c is an epic exoplanet

HD 83443 c scores 50 points on Spacedle's rarity scale, which places it in the epic tier. Another 28 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world, Eccentric orbit, Multi-planet system 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.