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Epic variable star 58 EP

HD 112319

RA 194.1482° · Dec -57.8992° · star

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Score breakdown

· 6 badges
58 pts · Epic
Epic 78 pts → Anomaly
  • Carbon star (sooty red) +24
  • Strongly variable +10
  • Under the Southern Cross +8
  • Deep red star +8
  • Variable star +5
  • A named variable star +3
Total score 58

20 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Under the Southern Cross · +8
  • Carbon star (sooty red) · +24
  • Deep red star · +8
  • Strongly variable · +10
  • A named variable star · +3

Trivia

Hard to believe

  • True brightness. It pours out about 744.7 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 C0ev — 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 10.2 you'll want a small backyard telescope, over in Crux.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around April — 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 3070 K, against the Sun's 5778 K.

Properties

absmag
-9.85
bv
2.1
constellation
Cru
luminosity
758577.575
mag
10.15
name
HD 112319
spect
C0ev
var amplitude
1.87
var designation
V
var max
8.618
var min
10.488

About HD 112319

HD 112319 is an epic variable star. It sits in the constellation Cru, shines at apparent magnitude 10.15 and has spectral type C0ev.

Its spectrum reads C0ev — 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 112319 in the constellation Cru. At apparent magnitude 10.15, a small backyard telescope will bring it into view.

Like any astronomical target, HD 112319 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 112319 is an epic variable star

HD 112319 scores 58 points on Spacedle's rarity scale, which places it in the epic tier. Another 20 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, Under the Southern Cross, Carbon star (sooty red), Deep red star, Strongly variable 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.