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Rare variable star 46 EP

HD 96548

RA 166.5717° · Dec -65.5098° · star

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Score breakdown

· 4 badges
46 pts · Rare
Rare 50 pts → Epic
  • Wolf-Rayet star (shedding itself) +34
  • Variable star +5
  • Gently variable +4
  • A named variable star +3
Total score 46

4 more points to reach Epic.

Badges

  • Variable star · +5
  • Wolf-Rayet star (shedding itself) · +34
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads WN8 (SB1) — a Wolf-Rayet star: a stellar monster shedding its own outer layers in a ferocious wind, on its way to a supernova.
  • 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 Carina.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • 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 brilliant white (B−V 0.1) — hotter and whiter than the Sun, the colour of Sirius or Vega.
  • Why no green stars. No star ever looks green: a surface hot enough to peak in green also floods out plenty of red and blue, and your eye blends the mixture back to white.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 8950 K, against the Sun's 5778 K.

Properties

absmag
-12.3
bv
0.108
constellation
Car
luminosity
7244359.6007
mag
7.7
name
HD 96548
spect
WN8 (SB1)
var amplitude
0.12
var designation
V385
var max
7.629
var min
7.749

About HD 96548

HD 96548 is a rare variable star. It sits in the constellation Car, shines at apparent magnitude 7.7 and has spectral type WN8 (SB1).

Its spectrum reads WN8 (SB1) — a Wolf-Rayet star: a stellar monster shedding its own outer layers in a ferocious wind, on its way to a supernova.

How to see it

Look for HD 96548 in the constellation Car. At apparent magnitude 7.7, it is an easy target for binoculars.

Like any astronomical target, HD 96548 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 96548 is a rare variable star

HD 96548 scores 46 points on Spacedle's rarity scale, which places it in the rare tier. Another 4 points would lift it into a rarer tier.

That score comes from 4 science badges — Variable star, Wolf-Rayet star (shedding itself), Gently 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.