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Uncommon exoplanet 33 EP

KMT-2021-BLG-1077L b

RA 266.4891° · Dec -33.8428° · exoplanet

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Score breakdown

· 5 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Found by microlensing +12
  • Distant (over 1,000 light-years) +6
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 33

1 more point to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Multi-planet system · +6
  • Found by microlensing · +12

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.
  • Crowded system. One of at least 2 planets orbiting its star.

Sense of scale

  • In perspective. Roughly as far as the centre of our galaxy — you're looking across the Milky Way.

Find it in the sky

  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around June — 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. ≈ 472.3 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
0.401
diameter km
125776.132
discovery facility
KMTNet
discovery method
Microlensing
discovery year
2022
dist ly
26875.2544
mass earth
69.9222
name
KMT-2021-BLG-1077L b
radius earth
9.86
semi major au
1.26
spect
M V
sys num planets
2
sys num stars
1

Nearby objects

About KMT-2021-BLG-1077L b

KMT-2021-BLG-1077L b is an uncommon exoplanet. It lies about 26,875.3 light-years from Earth, has spectral type M V, spans roughly 9.86 Earth radii and weighs about 69.92 Earth masses.

Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

How to see it

Like any astronomical target, KMT-2021-BLG-1077L 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 KMT-2021-BLG-1077L b is an uncommon exoplanet

KMT-2021-BLG-1077L b scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Multi-planet system and Found by microlensing — 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.