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Common variable star 19 EP

GL GJ 4315A

RA 347.4888° · Dec 47.9584° · star

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Score breakdown

· 5 badges
19 pts · Common
Common 22 pts → Uncommon
  • Binary star +6
  • Variable star +5
  • Orange K-type star +3
  • A named variable star +3
  • Main-sequence star +2
Total score 19

3 more points to reach Uncommon.

Badges

  • Variable star · +5
  • Binary star · +6
  • Orange K-type star · +3
  • Main-sequence star · +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 K0Ve — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
  • 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 7.9 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Andromeda.
  • 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
6.038
binary
yes
bv
0.9
constellation
And
dist ly
77.2331
luminosity
0.3348
mag
7.91
name
GL GJ 4315A
spect
K0Ve
var designation
KZ

About GL GJ 4315A

GL GJ 4315A is a common variable star. It lies about 77.2 light-years from Earth, sits in the constellation And, shines at apparent magnitude 7.91 and has spectral type K0Ve.

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 4315A in the constellation And. At apparent magnitude 7.91, it is an easy target for binoculars.

Like any astronomical target, GL GJ 4315A 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 4315A is a common variable star

GL GJ 4315A scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Binary star, Orange K-type star, Main-sequence star 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.