← Back to dex
Epic exoplanet 53 EP

XO-2 S d

RA 117.0310° · Dec 50.2169° · exoplanet

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

Computing the sky for your location…

Score breakdown

· 7 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Two suns in its sky +12
  • Long-period world +10
  • Frozen world +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 53

25 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Frozen world · +8
  • Long-period world · +10
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +12

Trivia

What makes it special

  • Frozen world. A deep-frozen world, too far from its star's warmth for anything to stay liquid.

What it actually is

  • What it is made of. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
  • Crowded system. One of at least 4 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 11.2 you'll want a small backyard telescope.
  • 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 January — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

density gcc
2.95
diameter km
165830.6
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2024
dist ly
493.7937
eccentricity
0.091
eq temp k
110.98
host star teff
5325
inclination
4
insolation
0.0253
mag
11.196
mass earth
1179.1434
multi star system
yes
name
XO-2 S d
orbital period days
4696
radius earth
13
semi major au
5.46
spect
G8 V
sys num planets
4
sys num stars
2

About XO-2 S d

XO-2 S d is an epic exoplanet. It lies about 493.8 light-years from Earth, shines at apparent magnitude 11.2, has spectral type G8 V and has an equilibrium temperature near 111 K.

A deep-frozen world, too far from its star's warmth for anything to stay liquid.

How to see it

At apparent magnitude 11.2, a small backyard telescope will bring it into view.

Like any astronomical target, XO-2 S d 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 XO-2 S d is an epic exoplanet

XO-2 S d scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world, Multi-planet system, Orbits a Sun-like star and Two suns in its sky — 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.