← Back to dex
Rare exoplanet 47 EP

HD 106270 b

RA 183.4049° · Dec -9.5136° · exoplanet

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 4 badges
47 pts · Rare
Rare 50 pts → Epic
  • In the habitable zone +30
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 47

3 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Orbits a Sun-like star · +8

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.

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

Properties

density gcc
10.4
diameter km
158176.88
discovery facility
W. M. Keck Observatory
discovery method
Radial Velocity
discovery year
2011
dist ly
305.9604
eccentricity
0.185
eq temp k
237.07
habitable zone
yes
host star teff
5509
inclination
63
insolation
0.511
mag
7.58
mass earth
3623.2438
name
HD 106270 b
orbital period days
1888
radius earth
12.4
semi major au
3.34
spect
G5 IV
sys num planets
1
sys num stars
1

Nearby objects

About HD 106270 b

HD 106270 b is a rare exoplanet. It lies about 306 light-years from Earth, shines at apparent magnitude 7.58, has spectral type G5 IV and has an equilibrium temperature near 237 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 7.58, it is an easy target for binoculars.

Like any astronomical target, HD 106270 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 HD 106270 b is a rare exoplanet

HD 106270 b scores 47 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Gas giant and Orbits a Sun-like 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.