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Uncommon star 33 EP

22Gam PsA

RA 343.1314° · Dec -32.8755° · star

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Score breakdown

· 6 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • Binary star +6
  • Giant star +6
  • White A-type star +5
  • Blue-white star +5
  • Star +3
Total score 33

1 more point to reach Rare.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • Binary star · +6
  • White A-type star · +5
  • Giant star · +6
  • Blue-white star · +5

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 A0III — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 4.5 you can see it with your own eyes from a dark site, over in Piscis Austrinus.
  • 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 September — that's when to go looking.

Could we get there?

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

Properties

absmag
0.361
binary
yes
bv
-0.037
constellation
PsA
dist ly
215.4267
luminosity
62.4597
mag
4.46
name
22Gam PsA
spect
A0III

About 22Gam PsA

22Gam PsA is an uncommon star. It lies about 215.4 light-years from Earth, sits in the constellation PsA, shines at apparent magnitude 4.46 and has spectral type A0III.

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 22Gam PsA in the constellation PsA. At apparent magnitude 4.46, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 22Gam PsA 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 22Gam PsA is an uncommon star

22Gam PsA scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 6 science badges — Star, Naked-eye visible, Binary star, White A-type star, Giant star and Blue-white 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.