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Uncommon variable star 32 EP

23Gam Per

RA 46.1991° · Dec 53.5064° · star

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Score breakdown

· 6 badges
32 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • Sun-like G-type star +8
  • Giant star +6
  • Variable star +5
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 32

2 more points to reach Rare.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • Sun-like G-type star · +8
  • Giant star · +6
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads G8III+... — a G-type star: the very same spectral class as our own Sun.
  • Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.
  • 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. 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 2.9 you can see it with your own eyes from a dark site, over in Perseus.
  • 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 November — that's when to go looking.

Could we get there?

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

Properties

absmag
-1.453
bv
0.716
constellation
Per
dist ly
243.2184
luminosity
332.0473
mag
2.91
name
23Gam Per
spect
G8III+...
var amplitude
0.02
var designation
Gam
var max
2.902
var min
2.922

About 23Gam Per

23Gam Per is an uncommon variable star. It lies about 243.2 light-years from Earth, sits in the constellation Per, shines at apparent magnitude 2.91 and has spectral type G8III+....

Its spectrum reads G8III+... — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for 23Gam Per in the constellation Per. At apparent magnitude 2.91, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 23Gam Per 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 23Gam Per is an uncommon variable star

23Gam Per scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, Naked-eye visible, Sun-like G-type star, Giant star, Barely variable (under 0.05 mag) 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.