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Common exoplanet 17 EP

HIP 98599 b

RA 300.4091° · Dec -22.1111° · exoplanet

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Score breakdown

· 3 badges
17 pts · Common
Common 22 pts → Uncommon
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 17

5 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Orbits a Sun-like star · +8

Trivia

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.

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 8.1 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 July — 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. ≈ 4.4 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 386.7 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
5.84
diameter km
162003.74
discovery facility
Multiple Facilities
discovery method
Radial Velocity
discovery year
2026
dist ly
247.692
eccentricity
0.169
eq temp k
171.08
host star teff
5978
inclination
29.7
insolation
0.1724
mag
8.11
mass earth
2177.1246
name
HIP 98599 b
orbital period days
2656
radius earth
12.7
semi major au
3.96
spect
F7 V
sys num planets
1
sys num stars
1

About HIP 98599 b

HIP 98599 b is a common exoplanet. It lies about 247.7 light-years from Earth, shines at apparent magnitude 8.11, has spectral type F7 V and has an equilibrium temperature near 171 K.

Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

How to see it

At apparent magnitude 8.11, it is an easy target for binoculars.

Like any astronomical target, HIP 98599 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 98599 b is a common exoplanet

HIP 98599 b scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Orbits a Sun-like star — 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.