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Epic variable star 66 EP

27Del Cep

RA 337.2927° · Dec 58.4152° · star

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Score breakdown

· 8 badges
66 pts · Epic
Epic 78 pts → Anomaly
  • Supergiant +18
  • Intrinsically luminous (Mv < −2) +10
  • Strongly variable +10
  • Naked-eye visible +8
  • Sun-like G-type star +8
  • Variable star +5
  • Never sets (northern circumpolar) +4
  • A named variable star +3
Total score 66

12 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • Never sets (northern circumpolar) · +4
  • 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 G2Ibvar — 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 4.1 you can see it with your own eyes from a dark site, over in Cepheus.
  • 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. Hopelessly far for any craft humanity can build today.

Properties

absmag
-3.048
bv
0.778
constellation
Cep
dist ly
865.1353
luminosity
1442.7796
mag
4.07
name
27Del Cep
spect
G2Ibvar
var amplitude
0.68
var designation
Del
var max
3.604
var min
4.284

About 27Del Cep

27Del Cep is an epic variable star. It lies about 865.1 light-years from Earth, sits in the constellation Cep, shines at apparent magnitude 4.07 and has spectral type G2Ibvar.

Its spectrum reads G2Ibvar — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for 27Del Cep in the constellation Cep. At apparent magnitude 4.07, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 27Del Cep 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 27Del Cep is an epic variable star

27Del Cep scores 66 points on Spacedle's rarity scale, which places it in the epic tier. Another 12 points would lift it into a rarer tier.

That score comes from 8 science badges — Variable star, Naked-eye visible, Never sets (northern circumpolar), Sun-like G-type star, Supergiant, Intrinsically luminous (Mv < −2), Strongly 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.