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Anomaly exoplanet 82 EP

HD 20782 b

RA 50.0166° · Dec -28.8544° · exoplanet

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Score breakdown

· 7 badges
82 pts · Anomaly
Anomaly 120 pts → Mythic
  • In the habitable zone +30
  • Richly packed system +14
  • Two suns in its sky +12
  • Eccentric orbit +9
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 82

38 more points to reach Mythic.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Eccentric orbit · +9
  • Richly packed system · +14
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +12

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.
  • Crowded system. One of at least 5 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 7.4 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 November — that's when to go looking.

Properties

density gcc
1.03
diameter km
173484.32
discovery facility
Anglo-Australian Telescope
discovery method
Radial Velocity
discovery year
2006
dist ly
117.3718
eccentricity
0.95
eq temp k
253.34
habitable zone
yes
host star teff
5782.13
insolation
0.6863
mag
7.36
mass earth
472.83
multi star system
yes
name
HD 20782 b
orbital period days
597.0643
radius earth
13.6
semi major au
1.3649
spect
G1.5 V
sys num planets
5
sys num stars
2

About HD 20782 b

HD 20782 b is an anomaly exoplanet. It lies about 117.4 light-years from Earth, shines at apparent magnitude 7.36, has spectral type G1.5 V and has an equilibrium temperature near 253 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 7.36, it is an easy target for binoculars.

Like any astronomical target, HD 20782 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 20782 b is an anomaly exoplanet

HD 20782 b scores 82 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 38 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, Richly packed system, Orbits a Sun-like star and Two suns in its sky — 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.