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Rare exoplanet 45 EP

HIP 67851 c

RA 208.4654° · Dec -35.3147° · exoplanet

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Score breakdown

· 4 badges
45 pts · Rare
Rare 50 pts → Epic
  • In the habitable zone +30
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 45

5 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Multi-planet system · +6

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.

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.
  • 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 2 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 6.2 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 April — that's when to go looking.

Properties

density gcc
5.91
diameter km
162003.74
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2015
dist ly
209.125
eccentricity
0.3
eq temp k
255.43
habitable zone
yes
host star teff
4840
inclination
89.863
insolation
0.7091
mag
6.17
mass earth
2204.7757
name
HIP 67851 c
orbital period days
3128.41
radius earth
12.7
semi major au
4.55
spect
K0 III
sys num planets
2
sys num stars
1

Nearby objects

About HIP 67851 c

HIP 67851 c is a rare exoplanet. It lies about 209.1 light-years from Earth, shines at apparent magnitude 6.17, has spectral type K0 III and has an equilibrium temperature near 255 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 6.17, it is an easy target for binoculars.

Like any astronomical target, HIP 67851 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 67851 c is a rare exoplanet

HIP 67851 c scores 45 points on Spacedle's rarity scale, which places it in the rare tier. Another 5 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Gas giant 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.