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Rare variable star 44 EP

GL Gl 570A

RA 224.3665° · Dec -21.4155° · star

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Score breakdown

· 9 badges
44 pts · Rare
Rare 50 pts → Epic
  • Nearby (<25 ly) +12
  • Naked-eye visible +8
  • Binary star +6
  • Variable star +5
  • On the zodiac +3
  • Orange K-type star +3
  • A named variable star +3
  • Main-sequence star +2
  • Barely variable (under 0.05 mag) +2
Total score 44

6 more points to reach Epic.

Badges

  • Variable star · +5
  • Nearby (<25 ly) · +12
  • Naked-eye visible · +8
  • Binary star · +6
  • On the zodiac · +3
  • Orange K-type star · +3
  • 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 K4V — 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 5.7 you can see it with your own eyes from a dark site, over in Libra.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Properties

absmag
6.888
binary
yes
bv
1.024
constellation
Lib
dist ly
19.0488
luminosity
0.153
mag
5.72
name
GL Gl 570A
spect
K4V
var amplitude
0.05
var designation
KX
var max
5.683
var min
5.733

About GL Gl 570A

GL Gl 570A is a rare variable star. It lies about 19 light-years from Earth, sits in the constellation Lib, shines at apparent magnitude 5.72 and has spectral type K4V.

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 570A in the constellation Lib. At apparent magnitude 5.72, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, GL Gl 570A 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 570A is a rare variable star

GL Gl 570A scores 44 points on Spacedle's rarity scale, which places it in the rare tier. Another 6 points would lift it into a rarer tier.

That score comes from 9 science badges — Variable star, Nearby (<25 ly), Naked-eye visible, Binary star, On the zodiac, Orange K-type star, Main-sequence star and Barely variable (under 0.05 mag) — 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.