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Epic exoplanet 69 EP

HAT-P-70 b

RA 74.5523° · Dec 9.9980° · exoplanet

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Score breakdown

· 7 badges
69 pts · Epic
Epic 78 pts → Anomaly
  • Ultra-hot Jupiter +26
  • Orbits a hot blue-white star +14
  • Tidally locked +10
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Blasted by starlight +4
Total score 69

9 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Ultra-hot Jupiter · +26
  • Tidally locked · +10
  • Blasted by starlight · +4
  • Orbits a hot blue-white star · +14

Trivia

What makes it special

  • Ultra-hot Jupiter. So hot that iron vaporises on the dayside, blows around to the night side and rains back down as molten metal.

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 9.5 you'll want a small backyard telescope.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • 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. Impossible with our current technology — and the next millennium of it.

Properties

density gcc
1.54
diameter km
267380.5396
discovery facility
HATNet
discovery method
Transit
discovery year
2019
dist ly
1078.7251
eccentricity
0
eq temp k
2562
host star teff
8450
inclination
96.5
insolation
5405.6
mag
9.47
mass earth
2154.8874
name
HAT-P-70 b
orbital period days
2.7443
radius earth
20.9608
semi major au
0.0474
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About HAT-P-70 b

HAT-P-70 b is an epic exoplanet. It lies about 1,078.7 light-years from Earth, shines at apparent magnitude 9.47, has an equilibrium temperature near 2,562 K and spans roughly 20.96 Earth radii.

So hot that iron vaporises on the dayside, blows around to the night side and rains back down as molten metal.

How to see it

At apparent magnitude 9.47, a small backyard telescope will bring it into view.

Like any astronomical target, HAT-P-70 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 HAT-P-70 b is an epic exoplanet

HAT-P-70 b scores 69 points on Spacedle's rarity scale, which places it in the epic tier. Another 9 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Ultra-hot Jupiter, Tidally locked, Blasted by starlight and Orbits a hot blue-white star — 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.