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Epic variable star 65 EP

HD 104994

RA 181.3280° · Dec -62.0528° · star

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Score breakdown

· 7 badges
65 pts · Epic
Epic 78 pts → Anomaly
  • Wolf-Rayet star (shedding itself) +34
  • Under the Southern Cross +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Blue-white star +5
  • Gently variable +4
  • A named variable star +3
Total score 65

13 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • Under the Southern Cross · +8
  • Wolf-Rayet star (shedding itself) · +34
  • Blue-white star · +5
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads WN3p — 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.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 10.8 you'll want a small backyard telescope, over in Crux.
  • 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.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 23.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
2.776
bv
-0.039
constellation
Cru
dist ly
1331.2491
luminosity
6.7546
mag
10.83
name
HD 104994
spect
WN3p
var amplitude
0.32
var designation
DI
var max
10.623
var min
10.943

About HD 104994

HD 104994 is an epic variable star. It lies about 1,331.2 light-years from Earth, sits in the constellation Cru, shines at apparent magnitude 10.83 and has spectral type WN3p.

Its spectrum reads WN3p — 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 104994 in the constellation Cru. At apparent magnitude 10.83, a small backyard telescope will bring it into view.

Like any astronomical target, HD 104994 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 104994 is an epic variable star

HD 104994 scores 65 points on Spacedle's rarity scale, which places it in the epic tier. Another 13 points would lift it into a rarer tier.

That score comes from 7 science badges — Variable star, Distant (over 1,000 light-years), Under the Southern Cross, Wolf-Rayet star (shedding itself), Blue-white star, 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.