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Epic exoplanet 56 EP

HD 331093 b

RA 295.6200° · Dec 31.7395° · exoplanet

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Score breakdown

· 5 badges
56 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Eccentric orbit +9
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 56

22 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Eccentric orbit · +9
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

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.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.

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 8.4 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.

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
Haute-Provence Observatory
discovery method
Radial Velocity
discovery year
2021
dist ly
163.7068
eccentricity
0.59
eq temp k
234.84
habitable zone
yes
host star teff
5544
inclination
0.3704
insolation
0.4895
mag
8.38
mass earth
476.7426
name
HD 331093 b
orbital period days
621.62
radius earth
13.6
semi major au
1.44
spect
K0
sys num planets
1
sys num stars
1

About HD 331093 b

HD 331093 b is an epic exoplanet. It lies about 163.7 light-years from Earth, shines at apparent magnitude 8.38, has spectral type K0 and has an equilibrium temperature near 235 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 8.38, it is an easy target for binoculars.

Like any astronomical target, HD 331093 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 331093 b is an epic exoplanet

HD 331093 b scores 56 points on Spacedle's rarity scale, which places it in the epic tier. Another 22 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, In the habitable zone, Gas giant, Eccentric orbit 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.