← Back to dex
Epic star 51 EP

Azelfafage

RA 325.5236° · Dec 51.1896° · star

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

Computing the sky for your location…

Score breakdown

· 8 badges
51 pts · Epic
Epic 78 pts → Anomaly
  • Intrinsically luminous (Mv < −2) +10
  • Naked-eye visible +8
  • Has a proper name +8
  • Distant (over 1,000 light-years) +6
  • Hot blue B-type star +6
  • Subgiant (leaving the main sequence) +5
  • Blue-white star +5
  • Star +3
Total score 51

27 more points to reach Anomaly.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Naked-eye visible · +8
  • Has a proper name · +8
  • Hot blue B-type star · +6
  • Subgiant (leaving the main sequence) · +5
  • Blue-white star · +5
  • Intrinsically luminous (Mv < −2) · +10

Trivia

What it actually is

  • Spectral class. Its spectrum reads B3IV — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.
  • Where it is in life. It is a subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.

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 Cygnus.
  • 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 August — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 30.3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-3.928
bv
-0.119
constellation
Cyg
dist ly
1725.693
luminosity
3244.8902
mag
4.69
name
Azelfafage
named
yes
spect
B3IV

About Azelfafage

Azelfafage is an epic star. It lies about 1,725.7 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 4.69 and has spectral type B3IV.

Its spectrum reads B3IV — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.

How to see it

Look for Azelfafage in the constellation Cyg. At apparent magnitude 4.69, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Azelfafage 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 Azelfafage is an epic star

Azelfafage scores 51 points on Spacedle's rarity scale, which places it in the epic tier. Another 27 points would lift it into a rarer tier.

That score comes from 8 science badges — Star, Distant (over 1,000 light-years), Naked-eye visible, Has a proper name, Hot blue B-type star, Subgiant (leaving the main sequence), Blue-white star and Intrinsically luminous (Mv < −2) — 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.