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Epic variable star 75 EP

Almaaz

RA 75.4922° · Dec 43.8233° · star

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Score breakdown

· 9 badges
75 pts · Epic
Epic 78 pts → Anomaly
  • Blindingly luminous (Mv < −5) +20
  • Supergiant +18
  • Naked-eye visible +8
  • Has a proper name +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Gently variable +4
  • Yellow-white F-type star +3
  • A named variable star +3
Total score 75

3 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • Naked-eye visible · +8
  • Has a proper name · +8
  • Yellow-white F-type star · +3
  • Supergiant · +18
  • Blindingly luminous (Mv < −5) · +20
  • Gently variable · +4
  • A named variable star · +3

Trivia

Hard to believe

  • True brightness. It pours out about 22.4 thousand times as much light as the Sun. It only looks ordinary because it is so far away.

What it actually is

  • Spectral class. Its spectrum reads F0Ia — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a luminous supergiant — among the largest and rarest stars in the galaxy.
  • 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 3 you can see it with your own eyes from a dark site, over in Auriga.
  • 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 December — that's when to go looking.

Properties

absmag
-6.047
bv
0.537
constellation
Aur
dist ly
2131.7387
luminosity
22845.4649
mag
3.03
name
Almaaz
named
yes
spect
F0Ia
var amplitude
0.15
var designation
Eps
var max
2.935
var min
3.085

About Almaaz

Almaaz is an epic variable star. It lies about 2,131.7 light-years from Earth, sits in the constellation Aur, shines at apparent magnitude 3.03 and has spectral type F0Ia.

Its spectrum reads F0Ia — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for Almaaz in the constellation Aur. At apparent magnitude 3.03, it can be glimpsed with the unaided eye under dark skies.

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

Almaaz scores 75 points on Spacedle's rarity scale, which places it in the epic tier. Another 3 points would lift it into a rarer tier.

That score comes from 9 science badges — Variable star, Distant (over 1,000 light-years), Naked-eye visible, Has a proper name, Yellow-white F-type star, Supergiant, Blindingly luminous (Mv < −5) and Gently 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.