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Rare exoplanet 43 EP

TOI-1338 c

RA 92.1331° · Dec -59.5410° · exoplanet

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Score breakdown

· 6 badges
43 pts · Rare
Rare 50 pts → Epic
  • Circumbinary (orbits both stars) +14
  • Orbits a Sun-like star +8
  • Distant (over 1,000 light-years) +6
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 43

7 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Multi-planet system · +6
  • Circumbinary (orbits both stars) · +14
  • Orbits a Sun-like star · +8

Trivia

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.
  • 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 11.7 you'll want a small backyard telescope.
  • 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 December — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Properties

circumbinary
yes
density gcc
0.379
diameter km
131388.86
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2023
dist ly
1301.4179
eccentricity
0.037
eq temp k
354.89
host star teff
5723.2
inclination
97
insolation
3.3833
mag
11.722
mass earth
75.4
name
TOI-1338 c
orbital period days
215.79
radius earth
10.3
semi major au
0.794
spect
F8
sys num planets
2
sys num stars
2

Nearby objects

About TOI-1338 c

TOI-1338 c is a rare exoplanet. It lies about 1,301.4 light-years from Earth, shines at apparent magnitude 11.72, has spectral type F8 and has an equilibrium temperature near 355 K.

Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

How to see it

At apparent magnitude 11.72, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-1338 c 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-1338 c is a rare exoplanet

TOI-1338 c scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Multi-planet system, Circumbinary (orbits both stars) 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.