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Uncommon exoplanet 27 EP

HD 25015 b

RA 59.4335° · Dec -20.2673° · 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.

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

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. 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 8.9 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around November — that's when to go looking.

Could we get there?

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

Properties

density gcc
8.12
diameter km
159452.5
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
122.09
eccentricity
0.341
eq temp k
90.69
host star teff
5160
inclination
32.046
insolation
0.0106
mag
8.87
mass earth
2884.9285
name
HD 25015 b
orbital period days
6134.427
radius earth
12.5
semi major au
6.248
spect
K2 V
sys num planets
1
sys num stars
1

About HD 25015 b

HD 25015 b is an uncommon exoplanet. It lies about 122.1 light-years from Earth, shines at apparent magnitude 8.87, has spectral type K2 V and has an equilibrium temperature near 91 K.

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

How to see it

At apparent magnitude 8.87, it is an easy target for binoculars.

Like any astronomical target, HD 25015 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 HD 25015 b is an uncommon exoplanet

HD 25015 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.