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Common star 18 EP

GL GJ 3690B

RA 178.0755° · Dec 10.0168° · star

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Score breakdown

· 4 badges
18 pts · Common
Common 22 pts → Uncommon
  • Binary star +6
  • Intrinsically feeble (Mv > +12) +6
  • Star +3
  • On the zodiac +3
Total score 18

4 more points to reach Uncommon.

Badges

  • Star · +3
  • Binary star · +6
  • On the zodiac · +3
  • 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 m — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

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 15 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Virgo.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around March — 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. ≈ 909.8 thousand years at Voyager 1's speed (17 km/s).

Properties

absmag
13.997
binary
yes
constellation
Vir
dist ly
51.7707
luminosity
0.0002
mag
15
name
GL GJ 3690B
spect
m

About GL GJ 3690B

GL GJ 3690B is a common star. It lies about 51.8 light-years from Earth, sits in the constellation Vir, shines at apparent magnitude 15 and has spectral type m.

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 3690B in the constellation Vir. At apparent magnitude 15, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, GL GJ 3690B 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 3690B is a common star

GL GJ 3690B scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Binary star, On the zodiac 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.