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Common exoplanet 18 EP

DMPP-9 b

RA 316.3060° · Dec -66.9582° · exoplanet

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Score breakdown

· 3 badges
18 pts · Common
Common 22 pts → Uncommon
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 18

4 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Orbits a Sun-like star · +8

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 9.2 you'll want a small backyard telescope.
  • 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. ≈ 6.3 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.35
diameter km
49621.618
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2026
dist ly
357.268
eccentricity
0.25
eq temp k
995.58
host star teff
6092
insolation
176.6011
mag
9.22
mass earth
14.43
name
DMPP-9 b
orbital period days
12.733
radius earth
3.89
semi major au
0.1097
sys num planets
1
sys num stars
1

About DMPP-9 b

DMPP-9 b is a common exoplanet. It lies about 357.3 light-years from Earth, shines at apparent magnitude 9.22, has an equilibrium temperature near 996 K and spans roughly 3.89 Earth radii.

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 9.22, a small backyard telescope will bring it into view.

Like any astronomical target, DMPP-9 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 DMPP-9 b is a common exoplanet

DMPP-9 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 3 science badges — Confirmed exoplanet, Sub-Neptune 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.