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Rare exoplanet 39 EP

HATS-2 b

RA 176.7388° · Dec -22.5630° · exoplanet

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Score breakdown

· 5 badges
39 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Tidally locked +10
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 39

11 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Lava world · +14
  • Tidally locked · +10

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

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 13.6 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. Impossible with our current technology — and the next millennium of it.

Properties

density gcc
1.2068
diameter km
160428.0476
discovery facility
HATSouth
discovery method
Transit
discovery year
2013
dist ly
1115.2089
eccentricity
0
eq temp k
1550
host star teff
5227
inclination
87.83
insolation
950.0563
mag
13.565
mass earth
435.4249
name
HATS-2 b
orbital period days
1.3541
radius earth
12.5765
semi major au
0.0232
spect
K
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HATS-2 b

HATS-2 b is a rare exoplanet. It lies about 1,115.2 light-years from Earth, shines at apparent magnitude 13.56, has spectral type K and has an equilibrium temperature near 1,550 K.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 13.56, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, HATS-2 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-2 b is a rare exoplanet

HATS-2 b scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Lava world 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.