← Back to dex
Rare exoplanet 35 EP

EPIC 228836835 b

RA 189.5749° · Dec -5.2446° · exoplanet

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

Computing the sky for your location…

Score breakdown

· 3 badges
35 pts · Rare
Rare 50 pts → Epic
  • Earth-sized +16
  • Ultra-short period +14
  • Confirmed exoplanet +5
Total score 35

15 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Earth-sized · +16
  • Ultra-short period · +14

Trivia

What makes it special

  • Earth-sized. Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

Hard to believe

  • A year in a day. Its entire year is over in 17.5 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.
  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

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 16.8 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around March — that's when to go looking.

Properties

density gcc
5.66
diameter km
14031.82
discovery facility
K2
discovery method
Transit
discovery year
2021
dist ly
489.6384
eq temp k
932
host star teff
3782
inclination
89.7
mag
16.77
mass earth
1.37
name
EPIC 228836835 b
orbital period days
0.7281
radius earth
1.1
sys num planets
1
sys num stars
1

Nearby objects

About EPIC 228836835 b

EPIC 228836835 b is a rare exoplanet. It lies about 489.6 light-years from Earth, shines at apparent magnitude 16.77, has an equilibrium temperature near 932 K and spans roughly 1.1 Earth radii.

Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

How to see it

At apparent magnitude 16.77, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, EPIC 228836835 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 EPIC 228836835 b is a rare exoplanet

EPIC 228836835 b scores 35 points on Spacedle's rarity scale, which places it in the rare tier. Another 15 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Earth-sized and Ultra-short period — 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.