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Rare variable star 38 EP

GL Gl 4.1A

RA 1.5653° · Dec 58.4367° · star

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Score breakdown

· 8 badges
38 pts · Rare
Rare 50 pts → Epic
  • Naked-eye visible +8
  • Sun-like G-type star +8
  • Binary star +6
  • Variable star +5
  • Never sets (northern circumpolar) +4
  • A named variable star +3
  • Main-sequence star +2
  • Barely variable (under 0.05 mag) +2
Total score 38

12 more points to reach Epic.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • Binary star · +6
  • Never sets (northern circumpolar) · +4
  • Sun-like G-type star · +8
  • Main-sequence star · +2
  • Barely variable (under 0.05 mag) · +2
  • 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 G5V — a G-type star: the very same spectral class as our own Sun.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.
  • 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 6 you can see it with your own eyes from a dark site, over in Cassiopeia.
  • 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 September — that's when to go looking.

Properties

absmag
4.32
binary
yes
bv
0.687
constellation
Cas
dist ly
70.0508
luminosity
1.6293
mag
5.98
name
GL Gl 4.1A
spect
G5V
var amplitude
0.03
var designation
V640
var max
5.964
var min
5.994

About GL Gl 4.1A

GL Gl 4.1A is a rare variable star. It lies about 70.1 light-years from Earth, sits in the constellation Cas, shines at apparent magnitude 5.98 and has spectral type G5V.

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 4.1A in the constellation Cas. At apparent magnitude 5.98, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, GL Gl 4.1A 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 4.1A is a rare variable star

GL Gl 4.1A scores 38 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.

That score comes from 8 science badges — Variable star, Naked-eye visible, Binary star, Never sets (northern circumpolar), Sun-like G-type star, Main-sequence star, Barely variable (under 0.05 mag) 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.