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Uncommon star 30 EP

GL Gl 22B

RA 8.0810° · Dec 67.2362° · star

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Score breakdown

· 6 badges
30 pts · Uncommon
Uncommon 34 pts → Rare
  • Binary star +6
  • Red dwarf +6
  • Intrinsically feeble (Mv > +12) +6
  • Cool red M-type star +5
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 30

4 more points to reach Rare.

Badges

  • Star · +3
  • Binary star · +6
  • Never sets (northern circumpolar) · +4
  • Cool red M-type star · +5
  • Red dwarf · +6
  • Intrinsically feeble (Mv > +12) · +6

Trivia

What makes it special

  • Not one star but two. It is a binary: two stars orbiting a shared centre of mass. More than half of all the 'stars' you can see are actually multiple systems.

What it actually is

  • Spectral class. Its spectrum reads dM3.5 — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 12.4 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Cassiopeia.
  • 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 September — that's when to go looking.

Could we get there?

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

Properties

absmag
12.372
binary
yes
constellation
Cas
dist ly
33.0318
luminosity
0.001
mag
12.4
name
GL Gl 22B
spect
dM3.5

About GL Gl 22B

GL Gl 22B is an uncommon star. It lies about 33 light-years from Earth, sits in the constellation Cas, shines at apparent magnitude 12.4 and has spectral type dM3.5.

It is a binary: two stars orbiting a shared centre of mass. More than half of all the 'stars' you can see are actually multiple systems.

How to see it

Look for GL Gl 22B in the constellation Cas. At apparent magnitude 12.4, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, GL Gl 22B 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 GL Gl 22B is an uncommon star

GL Gl 22B scores 30 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.

That score comes from 6 science badges — Star, Binary star, Never sets (northern circumpolar), Cool red M-type star, Red dwarf and Intrinsically feeble (Mv > +12) — 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.