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Uncommon exoplanet 33 EP

GJ 328 b

RA 133.7820° · Dec 1.5420° · exoplanet

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Score breakdown

· 5 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Long-period world +10
  • Frozen world +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 33

1 more point to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Frozen world · +8
  • Long-period world · +10
  • Multi-planet system · +6

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 2 planets orbiting its star.

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 10 you'll want a small backyard telescope.
  • 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 February — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.86
diameter km
169657.46
discovery facility
McDonald Observatory
discovery method
Radial Velocity
discovery year
2013
dist ly
66.9487
eccentricity
0.227
eq temp k
73.57
host star teff
3897
insolation
0.0049
mag
9.99
mass earth
797.7493
name
GJ 328 b
orbital period days
3771
radius earth
13.3
semi major au
4.11
spect
M0.0
sys num planets
2
sys num stars
1

About GJ 328 b

GJ 328 b is an uncommon exoplanet. It lies about 66.9 light-years from Earth, shines at apparent magnitude 9.99, has spectral type M0.0 and has an equilibrium temperature near 74 K.

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

How to see it

At apparent magnitude 9.99, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 328 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 GJ 328 b is an uncommon exoplanet

GJ 328 b scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world and Multi-planet system — 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.