← Back to dex
Common exoplanet 21 EP

HIP 107773 b

RA 327.5005° · Dec -64.7127° · exoplanet

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 3 badges
21 pts · Common
Common 22 pts → Uncommon
  • Its star is visible to the naked eye +12
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 21

1 more point to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Its star is visible to the naked eye · +12

Trivia

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.

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 5.6 you can see it with your own eyes from a dark site.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around August — 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. ≈ 6 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 535.6 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
1.44
diameter km
170933.08
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2015
dist ly
343.0509
eccentricity
0.09
eq temp k
957.11
host star teff
4945
insolation
142.9997
mag
5.62
mass earth
629.3034
name
HIP 107773 b
orbital period days
144.3
radius earth
13.4
semi major au
0.72
spect
K1 III
sys num planets
1
sys num stars
1

About HIP 107773 b

HIP 107773 b is a common exoplanet. It lies about 343.1 light-years from Earth, shines at apparent magnitude 5.62, has spectral type K1 III and has an equilibrium temperature near 957 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 5.62, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HIP 107773 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 107773 b is a common exoplanet

HIP 107773 b scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Its star is visible to the naked eye — 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.