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Common exoplanet 19 EP

HIP 65891 b

RA 202.6051° · Dec -58.6644° · exoplanet

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Score breakdown

· 3 badges
19 pts · Common
Common 22 pts → Uncommon
  • Disputed — it may not be there at all +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 19

3 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Disputed — it may not be there at all · +10

Trivia

What it actually is

  • What it is made of. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

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 6.8 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.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 8.6 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 765.4 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

controversial
yes
density gcc
5.2
diameter km
162003.74
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2015
dist ly
490.1864
eccentricity
0.09
eq temp k
429.05
host star teff
5000
inclination
89.9
insolation
5.617
mag
6.75
mass earth
1938.7533
name
HIP 65891 b
orbital period days
1089.6
radius earth
12.7
semi major au
2.82
spect
K0 III
sys num planets
1
sys num stars
1

About HIP 65891 b

HIP 65891 b is a common exoplanet. It lies about 490.2 light-years from Earth, shines at apparent magnitude 6.75, has spectral type K0 III and has an equilibrium temperature near 429 K.

Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

How to see it

At apparent magnitude 6.75, it is an easy target for binoculars.

Like any astronomical target, HIP 65891 b 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 65891 b is a common exoplanet

HIP 65891 b scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Disputed — it may not be there at all — 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.