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Uncommon exoplanet 23 EP

HIP 41378 e

RA 126.6158° · Dec 10.0804° · exoplanet

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Score breakdown

· 3 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Richly packed system +14
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 23

11 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Neptune-like · +4
  • Richly packed system · +14

Trivia

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

What it actually is

  • 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
0.3
diameter km
66204.678
discovery facility
K2
discovery method
Transit
discovery year
2016
dist ly
346.668
eccentricity
0.065
eq temp k
335
host star teff
6290
inclination
89.7
insolation
2.1
mag
8.93
mass earth
7.62
name
HIP 41378 e
orbital period days
393
radius earth
5.19
semi major au
0.68
spect
F6
sys num planets
6
sys num stars
1

About HIP 41378 e

HIP 41378 e 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 335 K.

Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

How to see it

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

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

HIP 41378 e scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Neptune-like 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.