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Uncommon star 22 EP

GL GJ 2155

RA 351.5515° · Dec 8.8938° · star

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Score breakdown

· 4 badges
22 pts · Uncommon
Uncommon 34 pts → Rare
  • Deep red star +8
  • Red dwarf +6
  • Cool red M-type star +5
  • Star +3
Total score 22

12 more points to reach Rare.

Badges

  • Star · +3
  • Cool red M-type star · +5
  • Deep red star · +8
  • Red dwarf · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads sdM: — 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 a subdwarf: an old, metal-poor star from the galaxy's early days, a little smaller and fainter than a main-sequence star of the same colour.

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 10.6 you'll want a small backyard telescope, over in Pegasus.
  • 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 September — 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. ≈ 1.3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
8.726
bv
1.461
constellation
Peg
dist ly
75.8854
luminosity
0.0282
mag
10.56
name
GL GJ 2155
spect
sdM:

About GL GJ 2155

GL GJ 2155 is an uncommon star. It lies about 75.9 light-years from Earth, sits in the constellation Peg, shines at apparent magnitude 10.56 and has spectral type sdM:.

Its spectrum reads sdM: — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

How to see it

Look for GL GJ 2155 in the constellation Peg. At apparent magnitude 10.56, a small backyard telescope will bring it into view.

Like any astronomical target, GL GJ 2155 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 2155 is an uncommon star

GL GJ 2155 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Cool red M-type 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.