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Rare star 41 EP

HIP 117034

RA 355.8775° · Dec 61.9300° · star

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Score breakdown

· 3 badges
41 pts · Rare
Rare 50 pts → Epic
  • Wolf-Rayet star (shedding itself) +34
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 41

9 more points to reach Epic.

Badges

  • Star · +3
  • Never sets (northern circumpolar) · +4
  • Wolf-Rayet star (shedding itself) · +34

Trivia

Hard to believe

  • True brightness. It pours out about 272.9 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 WN... — 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 11.2 you'll want a small backyard telescope, over in Cassiopeia.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
  • Best time of year. It stands highest in the middle of the night around September — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out orange (B−V 1) — cooler than the Sun, and the kind of star that burns steadily for tens of billions of years.
  • 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 4840 K, against the Sun's 5778 K.

Properties

absmag
-8.76
bv
0.96
constellation
Cas
luminosity
277971.3268
mag
11.24
name
HIP 117034
spect
WN...

About HIP 117034

HIP 117034 is a rare star. It sits in the constellation Cas, shines at apparent magnitude 11.24 and has spectral type WN....

Its spectrum reads WN... — 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 HIP 117034 in the constellation Cas. At apparent magnitude 11.24, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 117034 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 117034 is a rare star

HIP 117034 scores 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 9 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Never sets (northern circumpolar) 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.