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Epic exoplanet 77 EP

HD 38529 c

RA 86.6451° · Dec 1.1676° · exoplanet

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Score breakdown

· 7 badges
77 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Its star is visible to the naked eye +12
  • Two suns in its sky +12
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 77

1 more point to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Multi-planet system · +6
  • Its star is visible to the naked eye · +12
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +12

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

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.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.
  • Crowded system. One of at least 2 planets orbiting its star.

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 5.9 you can see it with your own eyes from a dark site.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.

Properties

density gcc
9.28
diameter km
159452.5
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2000
dist ly
138.1395
eccentricity
0.357
eq temp k
258.56
habitable zone
yes
host star teff
5697
inclination
104.559
insolation
0.656
mag
5.9285
mass earth
3299.0589
multi star system
yes
name
HD 38529 c
orbital period days
2127.6057
radius earth
12.5
semi major au
3.226
spect
G4 IV
sys num planets
2
sys num stars
2

About HD 38529 c

HD 38529 c is an epic exoplanet. It lies about 138.1 light-years from Earth, shines at apparent magnitude 5.93, has spectral type G4 IV and has an equilibrium temperature near 259 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 5.93, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HD 38529 c 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 HD 38529 c is an epic exoplanet

HD 38529 c scores 77 points on Spacedle's rarity scale, which places it in the epic tier. Another 1 point would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, In the habitable zone, Gas giant, Multi-planet system, Its star is visible to the naked eye, Orbits a Sun-like star 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.