← Back to dex
Common exoplanet 18 EP

Kepler-1515 b

RA 290.9739° · Dec 48.1782° · exoplanet

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

Computing the sky for your location…

Score breakdown

· 4 badges
18 pts · Common
Common 22 pts → Uncommon
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by Kepler +3
Total score 18

4 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Found by Kepler · +3

Trivia

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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 12.1 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 July — 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. ≈ 30.9 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
0.418
diameter km
121821.71
discovery facility
Kepler
discovery method
Transit
discovery year
2016
dist ly
1759.0278
eccentricity
0
eq temp k
380
host star teff
6511
inclination
89.99
insolation
6.017
mag
12.1
mass earth
66.2
name
Kepler-1515 b
orbital period days
214.3114
radius earth
9.55
semi major au
0.7523
sys num planets
1
sys num stars
1

About Kepler-1515 b

Kepler-1515 b is a common exoplanet. It lies about 1,759 light-years from Earth, shines at apparent magnitude 12.1, has an equilibrium temperature near 380 K and spans roughly 9.55 Earth radii.

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 12.1, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-1515 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 Kepler-1515 b is a common exoplanet

Kepler-1515 b scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant and Found by Kepler — 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.