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Uncommon star 31 EP

GL Gl 732A

RA 283.4247° · Dec -38.6161° · star

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Score breakdown

· 5 badges
31 pts · Uncommon
Uncommon 34 pts → Rare
  • Sun-like G-type star +8
  • Deep red star +8
  • Binary star +6
  • Intrinsically feeble (Mv > +12) +6
  • Star +3
Total score 31

3 more points to reach Rare.

Badges

  • Star · +3
  • Binary star · +6
  • Sun-like G-type star · +8
  • Deep red star · +8
  • Intrinsically feeble (Mv > +12) · +6

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 sdG0 — a G-type star: the very same spectral class as our own Sun.
  • Where it is in life. It is a subdwarf: an old, metal-poor star from the galaxy's early days, a little smaller and fainter than a main-sequence star of the same colour.

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 12.7 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Corona Australis.
  • 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 July — that's when to go looking.

Could we get there?

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

Properties

absmag
12.081
binary
yes
bv
1.53
constellation
CrA
dist ly
43.3719
luminosity
0.0013
mag
12.7
name
GL Gl 732A
spect
sdG0

About GL Gl 732A

GL Gl 732A is an uncommon star. It lies about 43.4 light-years from Earth, sits in the constellation CrA, shines at apparent magnitude 12.7 and has spectral type sdG0.

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 732A in the constellation CrA. At apparent magnitude 12.7, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, GL Gl 732A 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 732A is an uncommon star

GL Gl 732A scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Binary star, Sun-like G-type star, Deep red star and Intrinsically feeble (Mv > +12) — 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.