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Common exoplanet 19 EP

NGTS-1 b

RA 82.7142° · Dec -36.6310° · exoplanet

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Score breakdown

· 3 badges
19 pts · Common
Common 22 pts → Uncommon
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 19

3 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Tidally locked · +10

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 15.7 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • 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 December — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

density gcc
0.42
diameter km
190169.0469
discovery facility
Next-Generation Transit Survey (NGTS)
discovery method
Transit
discovery year
2017
dist ly
711.4147
eccentricity
0.016
eq temp k
790
host star teff
3916
inclination
85.27
insolation
65.3
mag
15.667
mass earth
258.078
name
NGTS-1 b
orbital period days
2.6473
radius earth
14.908
semi major au
0.0326
spect
M0.5
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About NGTS-1 b

NGTS-1 b is a common exoplanet. It lies about 711.4 light-years from Earth, shines at apparent magnitude 15.67, has spectral type M0.5 and has an equilibrium temperature near 790 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 15.67, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, NGTS-1 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 NGTS-1 b is a common exoplanet

NGTS-1 b scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Tidally locked — 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.