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Rare exoplanet 49 EP

TOI-1518 b

RA 352.2675° · Dec 67.0348° · exoplanet

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Score breakdown

· 5 badges
49 pts · Rare
Rare 50 pts → Epic
  • Ultra-hot Jupiter +26
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
  • Blasted by starlight +4
Total score 49

1 more point to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Ultra-hot Jupiter · +26
  • Tidally locked · +10
  • Blasted by starlight · +4

Trivia

What makes it special

  • Ultra-hot Jupiter. So hot that iron vaporises on the dayside, blows around to the night side and rains back down as molten metal.

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

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • 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.

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 9 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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.
  • Best time of year. It stands highest in the middle of the night around September — that's when to go looking.

Properties

density gcc
0.343
diameter km
268523.9512
discovery facility
Multiple Observatories
discovery method
Transit
discovery year
2021
dist ly
736.7473
eccentricity
0.01
eq temp k
2546
host star teff
7299
inclination
77.626
insolation
7010
mag
8.952
mass earth
581.626
name
TOI-1518 b
orbital period days
1.9026
radius earth
21.0505
semi major au
0.0371
spect
F0
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

Nearby objects

About TOI-1518 b

TOI-1518 b is a rare exoplanet. It lies about 736.7 light-years from Earth, shines at apparent magnitude 8.95, has spectral type F0 and has an equilibrium temperature near 2,546 K.

So hot that iron vaporises on the dayside, blows around to the night side and rains back down as molten metal.

How to see it

At apparent magnitude 8.95, it is an easy target for binoculars.

Like any astronomical target, TOI-1518 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-1518 b is a rare exoplanet

TOI-1518 b scores 49 points on Spacedle's rarity scale, which places it in the rare tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Ultra-hot Jupiter, Tidally locked and Blasted by starlight — 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.