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Rare star 37 EP

HD 136488

RA 231.0471° · Dec -62.6771° · star

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Score breakdown

· 2 badges
37 pts · Rare
Rare 50 pts → Epic
  • Wolf-Rayet star (shedding itself) +34
  • Star +3
Total score 37

13 more points to reach Epic.

Badges

  • Star · +3
  • Wolf-Rayet star (shedding itself) · +34

Trivia

Hard to believe

  • True brightness. It pours out about 1.8 million 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 WC9 — a Wolf-Rayet star: a stellar monster shedding its own outer layers in a ferocious wind, on its way to a supernova.

Find it in the sky

  • How to spot it. At magnitude 9.2 you'll want a small backyard telescope, over in Triangulum Australe.
  • 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 May — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out yellow-white (B−V 0.3) — a shade brighter and crisper than our own Sun.
  • 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 7200 K, against the Sun's 5778 K.

Properties

absmag
-10.81
bv
0.343
constellation
TrA
luminosity
1836538.3433
mag
9.19
name
HD 136488
spect
WC9

About HD 136488

HD 136488 is a rare star. It sits in the constellation TrA, shines at apparent magnitude 9.19 and has spectral type WC9.

Its spectrum reads WC9 — 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 136488 in the constellation TrA. At apparent magnitude 9.19, a small backyard telescope will bring it into view.

Like any astronomical target, HD 136488 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 136488 is a rare star

HD 136488 scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.

That score comes from 2 science badges — Star and Wolf-Rayet star (shedding itself) — 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.