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Uncommon exoplanet 27 EP

HIP 55507 b

RA 170.5227° · Dec 46.9078° · exoplanet

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Score breakdown

· 4 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Long-period world +10
  • Frozen world +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 27

7 more points to reach Rare.

Badges

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

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. 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 9.8 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 March — 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. ≈ 1.5 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
7.1
diameter km
160728.12
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
83.1349
eccentricity
0.362
eq temp k
76.05
host star teff
4171
inclination
135.022
insolation
0.0056
mag
9.8
mass earth
2585.5341
name
HIP 55507 b
orbital period days
5138.4373
radius earth
12.6
semi major au
5.062
spect
M0
sys num planets
1
sys num stars
1

About HIP 55507 b

HIP 55507 b is an uncommon exoplanet. It lies about 83.1 light-years from Earth, shines at apparent magnitude 9.8, has spectral type M0 and has an equilibrium temperature near 76 K.

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

How to see it

At apparent magnitude 9.8, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 55507 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 HIP 55507 b is an uncommon exoplanet

HIP 55507 b scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Frozen world and Long-period world — 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.