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Rare exoplanet 49 EP

HATS-37 A b

RA 199.8018° · Dec -22.9868° · exoplanet

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Score breakdown

· 6 badges
49 pts · Rare
Rare 50 pts → Epic
  • Two suns in its sky +12
  • Hot Jupiter +10
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 49

1 more point to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Hot Jupiter · +10
  • Tidally locked · +10
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +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

  • 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 12.3 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 April — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.55
diameter km
86648.453
discovery facility
HATSouth
discovery method
Transit
discovery year
2020
dist ly
691.1115
eccentricity
0
eq temp k
1085
host star teff
5326
inclination
89.33
insolation
229.7
mag
12.341
mass earth
31.4652
multi star system
yes
name
HATS-37 A b
orbital period days
4.3315
radius earth
6.7927
semi major au
0.0491
sys num planets
1
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About HATS-37 A b

HATS-37 A b is a rare exoplanet. It lies about 691.1 light-years from Earth, shines at apparent magnitude 12.34, has an equilibrium temperature near 1,085 K and spans roughly 6.79 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 12.34, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, HATS-37 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 HATS-37 A b is a rare exoplanet

HATS-37 A b scores 49 points on Spacedle's rarity scale, which places it in the rare tier. Another 1 point would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Tidally locked, Orbits a Sun-like star 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.