← Back to dex
Epic variable star 73 EP

Gam1Sgr

RA 271.2551° · Dec -29.5801° · star

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 9 badges
73 pts · Epic
Epic 78 pts → Anomaly
  • Supergiant +18
  • Intrinsically luminous (Mv < −2) +10
  • Strongly variable +10
  • Naked-eye visible +8
  • Toward the galactic centre +8
  • Sun-like G-type star +8
  • Variable star +5
  • On the zodiac +3
  • A named variable star +3
Total score 73

5 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • Toward the galactic centre · +8
  • On the zodiac · +3
  • Sun-like G-type star · +8
  • Supergiant · +18
  • Intrinsically luminous (Mv < −2) · +10
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads G0Ib/II — a G-type star: the very same spectral class as our own Sun.
  • Where it is in life. It is a supergiant, hundreds of times wider than the Sun.
  • 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 4.7 you can see it with your own eyes from a dark site, over in Sagittarius.
  • 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 June — that's when to go looking.

Could we get there?

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

Properties

absmag
-2.47
bv
0.774
constellation
Sgr
dist ly
869.7494
luminosity
847.2274
mag
4.66
name
Gam1Sgr
spect
G0Ib/II
var amplitude
0.73
var designation
W
var max
4.3
var min
5.03

About Gam1Sgr

Gam1Sgr is an epic variable star. It lies about 869.7 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 4.66 and has spectral type G0Ib/II.

Its spectrum reads G0Ib/II — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for Gam1Sgr in the constellation Sgr. At apparent magnitude 4.66, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Gam1Sgr 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 Gam1Sgr is an epic variable star

Gam1Sgr scores 73 points on Spacedle's rarity scale, which places it in the epic tier. Another 5 points would lift it into a rarer tier.

That score comes from 9 science badges — Variable star, Naked-eye visible, Toward the galactic centre, On the zodiac, Sun-like G-type star, Supergiant, Intrinsically luminous (Mv < −2) and Strongly variable — 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.