← Back to dex
Rare exoplanet 46 EP

KOI-1843.03

RA 285.0131° · Dec 40.2210° · exoplanet

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 6 badges
46 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Ultra-short period +14
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Blasted by starlight +4
  • Found by Kepler +3
Total score 46

4 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Lava world · +14
  • Ultra-short period · +14
  • Multi-planet system · +6
  • Blasted by starlight · +4
  • Found by Kepler · +3

Trivia

What makes it special

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

Hard to believe

  • A year in a day. Its entire year is over in 4.2 hours. Birthdays here would come round faster than meals.

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.
  • 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 15.3 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Properties

diameter km
7781.282
discovery facility
Kepler
discovery method
Transit
discovery year
2013
dist ly
438.0634
eq temp k
1654
host star teff
3584
inclination
72
insolation
1769.292
mag
15.295
mass earth
8
name
KOI-1843.03
orbital period days
0.1769
radius earth
0.61
semi major au
0.005
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About KOI-1843.03

KOI-1843.03 is a rare exoplanet. It lies about 438.1 light-years from Earth, shines at apparent magnitude 15.29, has an equilibrium temperature near 1,654 K and spans roughly 0.61 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 15.29, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, KOI-1843.03 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 KOI-1843.03 is a rare exoplanet

KOI-1843.03 scores 46 points on Spacedle's rarity scale, which places it in the rare tier. Another 4 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Lava world, Ultra-short period, Multi-planet system, Blasted by starlight and Found by Kepler — 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.