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Uncommon exoplanet 29 EP

HATS-7 b

RA 208.8567° · Dec -21.2079° · exoplanet

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Score breakdown

· 4 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Hot Jupiter +10
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 29

5 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Hot Jupiter · +10
  • 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 13.3 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
0.83
diameter km
80500.1304
discovery facility
HATSouth
discovery method
Transit
discovery year
2015
dist ly
785.0803
eccentricity
0.17
eq temp k
1084
host star teff
4985
inclination
87.92
insolation
211.6178
mag
13.347
mass earth
38.1396
name
HATS-7 b
orbital period days
3.1853
radius earth
6.3107
semi major au
0.0401
spect
K2
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HATS-7 b

HATS-7 b is an uncommon exoplanet. It lies about 785.1 light-years from Earth, shines at apparent magnitude 13.35, has spectral type K2 and has an equilibrium temperature near 1,084 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 13.35, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, HATS-7 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-7 b is an uncommon exoplanet

HATS-7 b scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.

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