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Common exoplanet 15 EP

K2-98 b

RA 126.4882° · Dec 11.5111° · exoplanet

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Score breakdown

· 3 badges
15 pts · Common
Common 22 pts → Uncommon
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 15

7 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Neptune-like · +4

Trivia

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • 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 12.2 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around January — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 29.7 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.4
diameter km
64628.7679
discovery facility
K2
discovery method
Transit
discovery year
2016
dist ly
1691.5266
eccentricity
0.119
eq temp k
1185
host star teff
6260
inclination
88.39
insolation
339
mag
12.216
mass earth
34.0076
name
K2-98 b
orbital period days
10.1367
radius earth
5.0665
semi major au
0.0986
spect
F8 V
sys num planets
1
sys num stars
1

About K2-98 b

K2-98 b is a common exoplanet. It lies about 1,691.5 light-years from Earth, shines at apparent magnitude 12.22, has spectral type F8 V and has an equilibrium temperature near 1,185 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 12.22, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, K2-98 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 K2-98 b is a common exoplanet

K2-98 b scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Distant (over 1,000 light-years) and Neptune-like — 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.