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Epic variable star 55 EP

12Del2Lyr

RA 283.6262° · Dec 36.8986° · star

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Score breakdown

· 8 badges
55 pts · Epic
Epic 78 pts → Anomaly
  • Bright giant +12
  • Intrinsically luminous (Mv < −2) +10
  • Naked-eye visible +8
  • Deep red star +8
  • Variable star +5
  • Cool red M-type star +5
  • Gently variable +4
  • A named variable star +3
Total score 55

23 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • Cool red M-type star · +5
  • Bright giant · +12
  • Deep red star · +8
  • Intrinsically luminous (Mv < −2) · +10
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads M4IIvar — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
  • Where it is in life. It is a bright giant, well on its way to the largest stars there are.
  • 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 4.2 you can see it with your own eyes from a dark site, over in Lyra.
  • 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 July — that's when to go looking.

Could we get there?

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

Properties

absmag
-2.548
bv
1.575
constellation
Lyr
dist ly
736.2437
luminosity
910.3324
mag
4.22
name
12Del2Lyr
spect
M4IIvar
var amplitude
0.18
var designation
Del-2
var max
4.133
var min
4.313

About 12Del2Lyr

12Del2Lyr is an epic variable star. It lies about 736.2 light-years from Earth, sits in the constellation Lyr, shines at apparent magnitude 4.22 and has spectral type M4IIvar.

Its spectrum reads M4IIvar — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

How to see it

Look for 12Del2Lyr in the constellation Lyr. At apparent magnitude 4.22, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 12Del2Lyr 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 12Del2Lyr is an epic variable star

12Del2Lyr scores 55 points on Spacedle's rarity scale, which places it in the epic tier. Another 23 points would lift it into a rarer tier.

That score comes from 8 science badges — Variable star, Naked-eye visible, Cool red M-type star, Bright giant, Deep red star, Intrinsically luminous (Mv < −2), Gently variable 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.