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Anomaly exoplanet 78 EP

HD 20794 f

RA 49.9998° · Dec -43.0667° · exoplanet

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Score breakdown

· 7 badges
78 pts · Anomaly
Anomaly 120 pts → Mythic
  • In the habitable zone +30
  • Nearby (<25 ly) +12
  • Its star is visible to the naked eye +12
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 78

42 more points to reach Mythic.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • In the habitable zone · +30
  • Sub-Neptune · +5
  • Multi-planet system · +6
  • Its star is visible to the naked eye · +12
  • 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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
  • 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 4 planets orbiting its star.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 4.3 you can see it with your own eyes from a dark site.
  • 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
2.7
diameter km
29084.136
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2025
dist ly
19.5784
eccentricity
0.45
eq temp k
214.52
habitable zone
yes
host star teff
5368
insolation
0.3746
mag
4.26
mass earth
5.82
name
HD 20794 f
orbital period days
647.6
radius earth
2.28
semi major au
1.3541
spect
G6 V
sys num planets
4
sys num stars
1

About HD 20794 f

HD 20794 f is an anomaly exoplanet. It lies about 19.6 light-years from Earth, shines at apparent magnitude 4.26, has spectral type G6 V and has an equilibrium temperature near 215 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 4.26, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 20794 f 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 20794 f is an anomaly exoplanet

HD 20794 f scores 78 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 42 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Nearby (<25 ly), In the habitable zone, Sub-Neptune, Multi-planet system, Its star is visible to the naked eye 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.