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Epic exoplanet 65 EP

HIP 41378 f

RA 126.6158° · Dec 10.0804° · exoplanet

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Score breakdown

· 5 badges
65 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Richly packed system +14
  • Puffy low-density world +12
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 65

13 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Puffy low-density world · +12
  • Richly packed system · +14

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

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.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.
  • 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.

Properties

density gcc
0.16
diameter km
120801.214
discovery facility
K2
discovery method
Transit
discovery year
2016
dist ly
346.668
eccentricity
0.052
eq temp k
294
habitable zone
yes
host star teff
6290
inclination
89.953
insolation
1.24
mag
8.93
mass earth
25
name
HIP 41378 f
orbital period days
542.0797
radius earth
9.47
semi major au
1.394
spect
F6
sys num planets
6
sys num stars
1

About HIP 41378 f

HIP 41378 f is an epic 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 294 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

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

Like any astronomical target, HIP 41378 f 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 f is an epic exoplanet

HIP 41378 f scores 65 points on Spacedle's rarity scale, which places it in the epic tier. Another 13 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, In the habitable zone, Gas giant, Puffy low-density world 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.