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Epic variable star 53 EP

HD 13725

RA 34.1740° · Dec 67.2839° · star

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Score breakdown

· 9 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Bright giant +12
  • Intrinsically luminous (Mv < −2) +10
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Never sets (northern circumpolar) +4
  • Orange K-type star +3
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 53

25 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • Never sets (northern circumpolar) · +4
  • Orange K-type star · +3
  • Bright giant · +12
  • Deep red star · +8
  • Intrinsically luminous (Mv < −2) · +10
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads K4II — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
  • 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 7 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cassiopeia.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
  • Best time of year. It stands highest in the middle of the night around October — that's when to go looking.

Could we get there?

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

Properties

absmag
-2.471
bv
1.824
constellation
Cas
dist ly
2568.1576
luminosity
848.0081
mag
7.01
name
HD 13725
spect
K4II
var amplitude
0.04
var designation
V990
var max
6.99
var min
7.03

About HD 13725

HD 13725 is an epic variable star. It lies about 2,568.2 light-years from Earth, sits in the constellation Cas, shines at apparent magnitude 7.01 and has spectral type K4II.

Its spectrum reads K4II — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

How to see it

Look for HD 13725 in the constellation Cas. At apparent magnitude 7.01, it is an easy target for binoculars.

Like any astronomical target, HD 13725 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 13725 is an epic variable star

HD 13725 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 9 science badges — Variable star, Distant (over 1,000 light-years), Never sets (northern circumpolar), Orange K-type star, Bright giant, Deep red star, Intrinsically luminous (Mv < −2) and Barely variable (under 0.05 mag) — 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.