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Rare variable star 34 EP

GL GJ 1108A

RA 122.2350° · Dec 32.8198° · star

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Score breakdown

· 8 badges
34 pts · Rare
Rare 50 pts → Epic
  • Binary star +6
  • Red dwarf +6
  • Variable star +5
  • Cool red M-type star +5
  • Gently variable +4
  • On the zodiac +3
  • A named variable star +3
  • Main-sequence star +2
Total score 34

16 more points to reach Epic.

Badges

  • Variable star · +5
  • Binary star · +6
  • On the zodiac · +3
  • Cool red M-type star · +5
  • Main-sequence star · +2
  • Red dwarf · +6
  • 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 M0.5V:e — 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 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 9.9 you'll want a small backyard telescope, over in Cancer.
  • 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 January — that's when to go looking.

Properties

absmag
8.261
binary
yes
bv
1.4
constellation
Cnc
dist ly
69.3802
luminosity
0.0432
mag
9.9
name
GL GJ 1108A
spect
M0.5V:e
var amplitude
0.24
var designation
FP
var max
9.798
var min
10.038

About GL GJ 1108A

GL GJ 1108A is a rare variable star. It lies about 69.4 light-years from Earth, sits in the constellation Cnc, shines at apparent magnitude 9.9 and has spectral type M0.5V:e.

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 1108A in the constellation Cnc. At apparent magnitude 9.9, a small backyard telescope will bring it into view.

Like any astronomical target, GL GJ 1108A 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 1108A is a rare variable star

GL GJ 1108A scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 16 points would lift it into a rarer tier.

That score comes from 8 science badges — Variable star, Binary star, On the zodiac, Cool red M-type star, Main-sequence star, Red dwarf, 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.