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Uncommon star 30 EP

GL GJ 9163

RA 70.1219° · Dec -9.1961° · star

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Score breakdown

· 6 badges
30 pts · Uncommon
Uncommon 34 pts → Rare
  • Deep red star +8
  • Binary star +6
  • Red dwarf +6
  • Cool red M-type star +5
  • Star +3
  • Main-sequence star +2
Total score 30

4 more points to reach Rare.

Badges

  • Star · +3
  • Binary star · +6
  • Cool red M-type star · +5
  • Main-sequence star · +2
  • Deep red star · +8
  • Red dwarf · +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 M0V... — 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 10.3 you'll want a small backyard telescope, over in Eridanus.
  • 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 November — that's when to go looking.

Could we get there?

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

Properties

absmag
8.799
binary
yes
bv
1.49
constellation
Eri
dist ly
64.2038
luminosity
0.0263
mag
10.27
name
GL GJ 9163
spect
M0V...

About GL GJ 9163

GL GJ 9163 is an uncommon star. It lies about 64.2 light-years from Earth, sits in the constellation Eri, shines at apparent magnitude 10.27 and has spectral type M0V....

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 GJ 9163 in the constellation Eri. At apparent magnitude 10.27, a small backyard telescope will bring it into view.

Like any astronomical target, GL GJ 9163 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 GJ 9163 is an uncommon star

GL GJ 9163 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, Cool red M-type star, Main-sequence star, Deep red star and Red dwarf — 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.