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Epic exoplanet 52 EP

PZ Tel b

RA 283.2746° · Dec -50.1809° · exoplanet

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Score breakdown

· 6 badges
52 pts · Epic
Epic 78 pts → Anomaly
  • Directly imaged +16
  • Long-period world +10
  • Eccentric orbit +9
  • Frozen world +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 52

26 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Frozen world · +8
  • Long-period world · +10
  • Eccentric orbit · +9
  • Directly imaged · +16

Trivia

What makes it special

  • Frozen world. A deep-frozen world, too far from its star's warmth for anything to stay liquid.

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

What it actually is

  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

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 8.4 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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 July — that's when to go looking.

Could we get there?

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

Properties

density gcc
28
diameter km
151798.78
discovery facility
W. M. Keck Observatory
discovery method
Imaging
discovery year
2023
dist ly
153.5047
eccentricity
0.52
eq temp k
53.77
host star teff
5169
inclination
91.73
insolation
0.0014
mag
8.43
mass earth
8581.367
name
PZ Tel b
orbital period days
44000
radius earth
11.9
semi major au
27
spect
G9 IV
sys num planets
1
sys num stars
1

About PZ Tel b

PZ Tel b is an epic exoplanet. It lies about 153.5 light-years from Earth, shines at apparent magnitude 8.43, has spectral type G9 IV and has an equilibrium temperature near 54 K.

A deep-frozen world, too far from its star's warmth for anything to stay liquid.

How to see it

At apparent magnitude 8.43, it is an easy target for binoculars.

Like any astronomical target, PZ Tel 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 PZ Tel b is an epic exoplanet

PZ Tel b scores 52 points on Spacedle's rarity scale, which places it in the epic tier. Another 26 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world, Eccentric orbit and Directly imaged — 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.