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Epic exoplanet 53 EP

TOI-1669 b

RA 45.9565° · Dec 83.5874° · exoplanet

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Score breakdown

· 5 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 53

25 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Multi-planet system · +6
  • 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.

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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 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 10.2 you'll want a small backyard telescope.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.

Properties

density gcc
0.374
diameter km
179862.42
discovery facility
W. M. Keck Observatory
discovery method
Radial Velocity
discovery year
2023
dist ly
362.9334
eccentricity
0
eq temp k
241.72
habitable zone
yes
host star teff
5497
insolation
0.571
mag
10.218
mass earth
191
name
TOI-1669 b
orbital period days
500
radius earth
14.1
semi major au
1.27
sys num planets
2
sys num stars
1

About TOI-1669 b

TOI-1669 b is an epic exoplanet. It lies about 362.9 light-years from Earth, shines at apparent magnitude 10.22, has an equilibrium temperature near 242 K and spans roughly 14.1 Earth radii.

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 10.22, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-1669 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 TOI-1669 b is an epic exoplanet

TOI-1669 b scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

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