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Uncommon exoplanet 33 EP

HD 27894 d

RA 65.1976° · Dec -59.4097° · 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. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • Crowded system. One of at least 3 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 9.4 you'll want a small backyard telescope.
  • 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
5.54
diameter km
162003.74
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2017
dist ly
142.9261
eccentricity
0.343
eq temp k
95.87
host star teff
4875
inclination
101.524
insolation
0.0124
mag
9.36
mass earth
2063.6598
name
HD 27894 d
orbital period days
5019.5424
radius earth
12.7
semi major au
5.362
spect
K2 V
sys num planets
3
sys num stars
1

About HD 27894 d

HD 27894 d is an uncommon exoplanet. It lies about 142.9 light-years from Earth, shines at apparent magnitude 9.36, has spectral type K2 V and has an equilibrium temperature near 96 K.

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

How to see it

At apparent magnitude 9.36, a small backyard telescope will bring it into view.

Like any astronomical target, HD 27894 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 HD 27894 d is an uncommon exoplanet

HD 27894 d 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.