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Rare exoplanet 35 EP

DMPP-3 A b

RA 91.6244° · Dec -72.5143° · exoplanet

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Score breakdown

· 4 badges
35 pts · Rare
Rare 50 pts → Epic
  • Two suns in its sky +12
  • Tidally locked +10
  • Super-Earth +8
  • Confirmed exoplanet +5
Total score 35

15 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Tidally locked · +10
  • Two suns in its sky · +12

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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

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 9.1 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 December — 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. ≈ 2.7 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
4.91
diameter km
18368.928
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
152.9401
eccentricity
0.42
eq temp k
854
host star teff
5138
insolation
142.7812
mag
9.1
mass earth
2.67
multi star system
yes
name
DMPP-3 A b
orbital period days
5.59
radius earth
1.44
semi major au
0.0596
spect
K0 V
sys num planets
1
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About DMPP-3 A b

DMPP-3 A b is a rare exoplanet. It lies about 152.9 light-years from Earth, shines at apparent magnitude 9.1, has spectral type K0 V and has an equilibrium temperature near 854 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 9.1, a small backyard telescope will bring it into view.

Like any astronomical target, DMPP-3 A 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-3 A b is a rare exoplanet

DMPP-3 A b scores 35 points on Spacedle's rarity scale, which places it in the rare tier. Another 15 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Super-Earth, Tidally locked and Two suns in its sky — 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.