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Uncommon exoplanet 28 EP

Kepler-45 b

RA 292.8729° · Dec 41.0642° · exoplanet

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Score breakdown

· 5 badges
28 pts · Uncommon
Uncommon 34 pts → Rare
  • Tidally locked +10
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by Kepler +3
Total score 28

6 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Tidally locked · +10
  • 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

  • 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 16.7 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.

Properties

density gcc
0.8
diameter km
137256.712
discovery facility
Kepler
discovery method
Transit
discovery year
2011
dist ly
1245.7496
eccentricity
0.11
eq temp k
1000
host star teff
3820
inclination
87
insolation
68.37
mag
16.744
mass earth
160.497
name
Kepler-45 b
orbital period days
2.4552
radius earth
10.76
semi major au
0.03
spect
M
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About Kepler-45 b

Kepler-45 b is an uncommon exoplanet. It lies about 1,245.7 light-years from Earth, shines at apparent magnitude 16.74, has spectral type M and has an equilibrium temperature near 1,000 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 16.74, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-45 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-45 b is an uncommon exoplanet

Kepler-45 b scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Tidally locked 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.