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Uncommon variable star 23 EP

HR 5437

RA 217.9285° · Dec 60.2256° · star

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Score breakdown

· 6 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Giant star +6
  • Variable star +5
  • Never sets (northern circumpolar) +4
  • Yellow-white F-type star +3
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 23

11 more points to reach Rare.

Badges

  • Variable star · +5
  • Never sets (northern circumpolar) · +4
  • Yellow-white F-type star · +3
  • Giant star · +6
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F0III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.
  • 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 6.3 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Draco.
  • 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 April — that's when to go looking.

Could we get there?

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

Properties

absmag
0.917
bv
0.243
constellation
Dra
dist ly
381.9156
luminosity
37.4283
mag
6.26
name
HR 5437
spect
F0III
var amplitude
0.03
var designation
ER
var max
6.25
var min
6.28

About HR 5437

HR 5437 is an uncommon variable star. It lies about 381.9 light-years from Earth, sits in the constellation Dra, shines at apparent magnitude 6.26 and has spectral type F0III.

Its spectrum reads F0III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HR 5437 in the constellation Dra. At apparent magnitude 6.26, it is an easy target for binoculars.

Like any astronomical target, HR 5437 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 HR 5437 is an uncommon variable star

HR 5437 scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, Never sets (northern circumpolar), Yellow-white F-type star, Giant star, Barely variable (under 0.05 mag) 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.