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Anomaly exoplanet 86 EP

HD 222582 b

RA 355.4641° · Dec -5.9862° · exoplanet

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Score breakdown

· 7 badges
86 pts · Anomaly
Anomaly 120 pts → Mythic
  • In the habitable zone +30
  • Found before the year 2000 +18
  • Two suns in its sky +12
  • Eccentric orbit +9
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 86

34 more points to reach Mythic.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Eccentric orbit · +9
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +12
  • Found before the year 2000 · +18

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. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • 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 7.7 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 September — that's when to go looking.

Could we get there?

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

Properties

density gcc
7.31
diameter km
160728.12
discovery facility
W. M. Keck Observatory
discovery method
Radial Velocity
discovery year
1999
dist ly
137.5028
eccentricity
0.73
eq temp k
256.39
habitable zone
yes
host star teff
5790
insolation
0.7253
mag
7.68
mass earth
2660.2371
multi star system
yes
name
HD 222582 b
orbital period days
572.38
radius earth
12.6
semi major au
1.34
spect
G5 V
sys num planets
1
sys num stars
2

About HD 222582 b

HD 222582 b is an anomaly exoplanet. It lies about 137.5 light-years from Earth, shines at apparent magnitude 7.68, has spectral type G5 V and has an equilibrium temperature near 256 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 7.68, it is an easy target for binoculars.

Like any astronomical target, HD 222582 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 222582 b is an anomaly exoplanet

HD 222582 b scores 86 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 34 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, In the habitable zone, Gas giant, Eccentric orbit, Orbits a Sun-like star, Two suns in its sky 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.