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Epic variable star 56 EP

HD 51610

RA 105.3251° · Dec 55.3305° · star

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Score breakdown

· 5 badges
56 pts · Epic
Epic 78 pts → Anomaly
  • S-type star (zirconium giant) +20
  • Dramatic variable (over 2 magnitudes) +20
  • Deep red star +8
  • Variable star +5
  • A named variable star +3
Total score 56

22 more points to reach Anomaly.

Badges

  • Variable star · +5
  • S-type star (zirconium giant) · +20
  • Deep red star · +8
  • Dramatic variable (over 2 magnitudes) · +20
  • A named variable star · +3

Trivia

Hard to believe

  • True brightness. It pours out about 912 thousand times as much light as the Sun. It only looks ordinary because it is so far away.

What it actually is

  • Spectral class. Its spectrum reads S39e — 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.

Find it in the sky

  • How to spot it. At magnitude 9.9 you'll want a small backyard telescope, over in Lynx.
  • 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 January — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out deep orange-red (B−V 2.1) — one of the coolest surfaces a star can have while still fusing.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 3090 K, against the Sun's 5778 K.

Properties

absmag
-10.07
bv
2.08
constellation
Lyn
luminosity
928966.3868
mag
9.93
name
HD 51610
spect
S39e
var amplitude
4.05
var designation
R
var max
7.458
var min
11.508

About HD 51610

HD 51610 is an epic variable star. It sits in the constellation Lyn, shines at apparent magnitude 9.93 and has spectral type S39e.

Its spectrum reads S39e — an S-type giant, its atmosphere laced with zirconium dredged up from the fusion going on below.

How to see it

Look for HD 51610 in the constellation Lyn. At apparent magnitude 9.93, a small backyard telescope will bring it into view.

Like any astronomical target, HD 51610 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 51610 is an epic variable star

HD 51610 scores 56 points on Spacedle's rarity scale, which places it in the epic tier. Another 22 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, 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.