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Rare star 37 EP

HD 65865

RA 119.9427° · Dec -28.7342° · 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 363.1 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 10.9 you'll want a small backyard telescope, over in Puppis.
  • 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 January — 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 0.3) — 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 7530 K, against the Sun's 5778 K.

Properties

absmag
-9.07
bv
0.29
constellation
Pup
luminosity
369828.1798
mag
10.93
name
HD 65865
spect
WN...

About HD 65865

HD 65865 is a rare star. It sits in the constellation Pup, shines at apparent magnitude 10.93 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 HD 65865 in the constellation Pup. At apparent magnitude 10.93, a small backyard telescope will bring it into view.

Like any astronomical target, HD 65865 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 65865 is a rare star

HD 65865 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.