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Uncommon exoplanet 24 EP

HIP 41378 c

RA 126.6158° · Dec 10.0804° · exoplanet

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Score breakdown

· 3 badges
24 pts · Uncommon
Uncommon 34 pts → Rare
  • Richly packed system +14
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 24

10 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Richly packed system · +14

Trivia

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.
  • Crowded system. One of at least 6 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 8.9 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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 January — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.6
diameter km
34951.988
discovery facility
K2
discovery method
Transit
discovery year
2016
dist ly
346.668
eccentricity
0.044
eq temp k
757
host star teff
6290
inclination
88.462
insolation
54
mag
8.93
mass earth
5.97
name
HIP 41378 c
orbital period days
31.7059
radius earth
2.74
semi major au
0.2093
spect
F6
sys num planets
6
sys num stars
1

About HIP 41378 c

HIP 41378 c is an uncommon exoplanet. It lies about 346.7 light-years from Earth, shines at apparent magnitude 8.93, has spectral type F6 and has an equilibrium temperature near 757 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 8.93, it is an easy target for binoculars.

Like any astronomical target, HIP 41378 c 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 41378 c is an uncommon exoplanet

HIP 41378 c scores 24 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 10 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Sub-Neptune and Richly packed 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.