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Common variable star 21 EP

GL GJ 3199A

RA 46.7142° · Dec 40.3593° · star

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Score breakdown

· 5 badges
21 pts · Common
Common 22 pts → Uncommon
  • Binary star +6
  • Variable star +5
  • Gently variable +4
  • Orange K-type star +3
  • A named variable star +3
Total score 21

1 more point to reach Uncommon.

Badges

  • Variable star · +5
  • Binary star · +6
  • Orange K-type star · +3
  • Gently variable · +4
  • A named variable star · +3

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 K6 — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
  • It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.

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 9.7 you'll want a small backyard telescope, over in Perseus.
  • 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 November — that's when to go looking.

Could we get there?

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

Properties

absmag
7.479
binary
yes
bv
1.19
constellation
Per
dist ly
89.0406
luminosity
0.0888
mag
9.66
name
GL GJ 3199A
spect
K6
var amplitude
0.16
var designation
V568
var max
9.62
var min
9.78

About GL GJ 3199A

GL GJ 3199A is a common variable star. It lies about 89 light-years from Earth, sits in the constellation Per, shines at apparent magnitude 9.66 and has spectral type K6.

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 3199A in the constellation Per. At apparent magnitude 9.66, a small backyard telescope will bring it into view.

Like any astronomical target, GL GJ 3199A 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 3199A is a common variable star

GL GJ 3199A scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Binary star, Orange K-type star, Gently variable and A named variable star — 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.