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Epic variable star 53 EP

HD 251549

RA 91.6456° · Dec 26.3292° · star

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Score breakdown

· 7 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Supergiant +18
  • Strongly variable +10
  • Sun-like G-type star +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • On the zodiac +3
  • A named variable star +3
Total score 53

25 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • On the zodiac · +3
  • Sun-like G-type star · +8
  • Supergiant · +18
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads G0Ib — 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 9.8 you'll want a small backyard telescope, over in Gemini.
  • 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.

Could we get there?

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

Properties

absmag
1.871
bv
1.107
constellation
Gem
dist ly
1274.0469
luminosity
15.5453
mag
9.83
name
HD 251549
spect
G0Ib
var amplitude
0.63
var designation
AA
var max
9.361
var min
9.991

About HD 251549

HD 251549 is an epic variable star. It lies about 1,274 light-years from Earth, sits in the constellation Gem, shines at apparent magnitude 9.83 and has spectral type G0Ib.

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

How to see it

Look for HD 251549 in the constellation Gem. At apparent magnitude 9.83, a small backyard telescope will bring it into view.

Like any astronomical target, HD 251549 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 HD 251549 is an epic variable star

HD 251549 scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

That score comes from 7 science badges — Variable star, Distant (over 1,000 light-years), On the zodiac, Sun-like G-type star, Supergiant, 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.