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Uncommon exoplanet 31 EP

HATS-74 A b

RA 171.0148° · Dec -19.5570° · exoplanet

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Score breakdown

· 4 badges
31 pts · Uncommon
Uncommon 34 pts → Rare
  • Two suns in its sky +12
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 31

3 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • 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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

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 17.3 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 March — 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. ≈ 17.2 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
1.64
diameter km
147559.4876
discovery facility
HATSouth
discovery method
Transit
discovery year
2021
dist ly
976.4752
eccentricity
0.044
eq temp k
895.1
host star teff
3776.9
inclination
87.39
insolation
106.9
mag
17.26
mass earth
464.0295
multi star system
yes
name
HATS-74 A b
orbital period days
1.7319
radius earth
11.5677
semi major au
0.0238
sys num planets
1
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About HATS-74 A b

HATS-74 A b is an uncommon exoplanet. It lies about 976.5 light-years from Earth, shines at apparent magnitude 17.26, has an equilibrium temperature near 895 K and spans roughly 11.57 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 17.26, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, HATS-74 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-74 A b is an uncommon exoplanet

HATS-74 A b scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, 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.