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Epic variable star 62 EP

HR 90

RA 6.0081° · Dec 38.5770° · star

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Score breakdown

· 6 badges
62 pts · Epic
Epic 78 pts → Anomaly
  • S-type star (zirconium giant) +20
  • Dramatic variable (over 2 magnitudes) +20
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • A named variable star +3
Total score 62

16 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • S-type star (zirconium giant) · +20
  • Deep red star · +8
  • Dramatic variable (over 2 magnitudes) · +20
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads S66ev — an S-type giant, its atmosphere laced with zirconium dredged up from the fusion going on below.
  • 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 10.7 you'll want a small backyard telescope, over in Andromeda.
  • 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 September — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 22.1 million years at Voyager 1's speed (17 km/s).

Properties

absmag
2.776
bv
2.08
constellation
And
dist ly
1259.2896
luminosity
6.7546
mag
10.71
name
HR 90
spect
S66ev
var amplitude
2.97
var designation
R
var max
8.045
var min
11.015

About HR 90

HR 90 is an epic variable star. It lies about 1,259.3 light-years from Earth, sits in the constellation And, shines at apparent magnitude 10.71 and has spectral type S66ev.

Its spectrum reads S66ev — an S-type giant, its atmosphere laced with zirconium dredged up from the fusion going on below.

How to see it

Look for HR 90 in the constellation And. At apparent magnitude 10.71, a small backyard telescope will bring it into view.

Like any astronomical target, HR 90 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 90 is an epic variable star

HR 90 scores 62 points on Spacedle's rarity scale, which places it in the epic tier. Another 16 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, Distant (over 1,000 light-years), S-type star (zirconium giant), Deep red star, Dramatic variable (over 2 magnitudes) 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.