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Epic variable star 54 EP

HIP 59844

RA 184.0700° · Dec -56.2860° · star

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Score breakdown

· 6 badges
54 pts · Epic
Epic 78 pts → Anomaly
  • S-type star (zirconium giant) +20
  • Strongly variable +10
  • Under the Southern Cross +8
  • Deep red star +8
  • Variable star +5
  • A named variable star +3
Total score 54

24 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Under the Southern Cross · +8
  • S-type star (zirconium giant) · +20
  • Deep red star · +8
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads SC45/8e — 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 7.7 it is just past naked-eye reach — ordinary binoculars will pull it in, 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 March — 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 2.9) — one of the coolest surfaces a star can have while still fusing.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 2480 K, against the Sun's 5778 K.

What's in a name

  • Its catalogue. The HIP number comes from Hipparcos, the ESA satellite that between 1989 and 1993 pinned down 118,000 stars precisely enough to triangulate their distances.

Properties

absmag
-12.26
bv
2.862
constellation
Cru
luminosity
6982324.0408
mag
7.74
name
HIP 59844
spect
SC45/8e
var amplitude
1.66
var designation
BH
var max
7.033
var min
8.693

About HIP 59844

HIP 59844 is an epic variable star. It sits in the constellation Cru, shines at apparent magnitude 7.74 and has spectral type SC45/8e.

Its spectrum reads SC45/8e — an S-type giant, its atmosphere laced with zirconium dredged up from the fusion going on below.

How to see it

Look for HIP 59844 in the constellation Cru. At apparent magnitude 7.74, it is an easy target for binoculars.

Like any astronomical target, HIP 59844 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 HIP 59844 is an epic variable star

HIP 59844 scores 54 points on Spacedle's rarity scale, which places it in the epic tier. Another 24 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, Under the Southern Cross, S-type star (zirconium giant), 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.