← Back to dex
Uncommon exoplanet 31 EP

bet UMi b

RA 222.6765° · Dec 74.1555° · exoplanet

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

Computing the sky for your location…

Score breakdown

· 4 badges
31 pts · Uncommon
Uncommon 34 pts → Rare
  • Its star is visible to the naked eye +12
  • Hot Jupiter +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 31

3 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Hot Jupiter · +10
  • Its star is visible to the naked eye · +12

Trivia

What it actually is

  • What it is made of. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

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 2.1 you can see it with your own eyes from a dark site.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 2.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 197.5 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
5.2
diameter km
162003.74
discovery facility
Bohyunsan Optical Astronomical Observatory
discovery method
Radial Velocity
discovery year
2014
dist ly
126.4661
eccentricity
0.19
eq temp k
1040.63
host star teff
4126
insolation
273.9958
mag
2.0569
mass earth
1938.7
name
bet UMi b
orbital period days
522.3
radius earth
12.7
semi major au
1.4
spect
K4 III
sys num planets
1
sys num stars
1

About bet UMi b

bet UMi b is an uncommon exoplanet. It lies about 126.5 light-years from Earth, shines at apparent magnitude 2.06, has spectral type K4 III and has an equilibrium temperature near 1,041 K.

Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

How to see it

At apparent magnitude 2.06, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, bet UMi 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 bet UMi b is an uncommon exoplanet

bet UMi b scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter and Its star is visible to the naked eye — 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.