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Rare variable star 36 EP

HD 141826

RA 237.3805° · Dec 39.5716° · star

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Score breakdown

· 4 badges
36 pts · Rare
Rare 50 pts → Epic
  • Dramatic variable (over 2 magnitudes) +20
  • Deep red star +8
  • Variable star +5
  • A named variable star +3
Total score 36

14 more points to reach Epic.

Badges

  • Variable star · +5
  • 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 779.8 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 N2 — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.
  • 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 10.1 you'll want a small backyard telescope, over in Corona Borealis.
  • 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 May — 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 4.4) — one of the coolest surfaces a star can have while still fusing.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 1780 K, against the Sun's 5778 K.

Properties

absmag
-9.9
bv
4.41
constellation
CrB
luminosity
794328.2347
mag
10.1
name
HD 141826
spect
N2
var amplitude
2.46
var designation
V
var max
8.688
var min
11.148

About HD 141826

HD 141826 is a rare variable star. It sits in the constellation CrB, shines at apparent magnitude 10.1 and has spectral type N2.

Its spectrum reads N2 — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.

How to see it

Look for HD 141826 in the constellation CrB. At apparent magnitude 10.1, a small backyard telescope will bring it into view.

Like any astronomical target, HD 141826 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 141826 is a rare variable star

HD 141826 scores 36 points on Spacedle's rarity scale, which places it in the rare tier. Another 14 points would lift it into a rarer tier.

That score comes from 4 science badges — Variable star, 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.