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Rare exoplanet 47 EP

COCONUTS-2 b

RA 117.3009° · Dec -76.7027° · exoplanet

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Score breakdown

· 5 badges
47 pts · Rare
Rare 50 pts → Epic
  • Directly imaged +16
  • Orbits beyond Neptune's distance +12
  • Long-period world +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 47

3 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Long-period world · +10
  • Directly imaged · +16
  • Orbits beyond Neptune's distance · +12

Trivia

What it actually is

  • 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. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 11.3 you'll want a small backyard telescope.
  • 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 January — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 624 thousand years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 55.4 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
6.58
diameter km
160428.0476
discovery facility
NASA Infrared Telescope Facility (IRTF)
discovery method
Imaging
discovery year
2021
dist ly
35.5066
eq temp k
493
host star teff
3552
insolation
0
mag
11.298
mass earth
2383.7131
name
COCONUTS-2 b
orbital period days
402000000
radius earth
12.5765
semi major au
7506
spect
M3 V
sys num planets
1
sys num stars
1

About COCONUTS-2 b

COCONUTS-2 b is a rare exoplanet. It lies about 35.5 light-years from Earth, shines at apparent magnitude 11.3, has spectral type M3 V and has an equilibrium temperature near 493 K.

Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

How to see it

At apparent magnitude 11.3, a small backyard telescope will bring it into view.

Like any astronomical target, COCONUTS-2 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 COCONUTS-2 b is a rare exoplanet

COCONUTS-2 b scores 47 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Long-period world, Directly imaged and Orbits beyond Neptune's distance — 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.