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Rare exoplanet 43 EP

OGLE2-TR-L9 b

RA 166.9799° · Dec -61.1462° · exoplanet

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Score breakdown

· 6 badges
43 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Tidally locked +10
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Blasted by starlight +4
Total score 43

7 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Lava world · +14
  • Tidally locked · +10
  • Blasted by starlight · +4

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

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 14.7 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around March — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.25
diameter km
230198.3852
discovery facility
OGLE
discovery method
Transit
discovery year
2008
dist ly
5308.6129
eq temp k
2034
host star teff
6933
inclination
79.8
insolation
4135.4482
mag
14.718
mass earth
1430.175
name
OGLE2-TR-L9 b
orbital period days
2.4855
radius earth
18.046
semi major au
0.0308
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About OGLE2-TR-L9 b

OGLE2-TR-L9 b is a rare exoplanet. It lies about 5,308.6 light-years from Earth, shines at apparent magnitude 14.72, has an equilibrium temperature near 2,034 K and spans roughly 18.05 Earth radii.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 14.72, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, OGLE2-TR-L9 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 OGLE2-TR-L9 b is a rare exoplanet

OGLE2-TR-L9 b 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, Lava world, 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.