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Rare variable star 46 EP

HD 73882

RA 129.7897° · Dec -40.4192° · star

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Score breakdown

· 6 badges
46 pts · Rare
Rare 50 pts → Epic
  • Blazing O-type star +26
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Gently variable +4
  • A named variable star +3
  • Main-sequence star +2
Total score 46

4 more points to reach Epic.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • Blazing O-type star · +26
  • Main-sequence star · +2
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads O8V: — an O-type star — the hottest, rarest main class there is. Fewer than one star in a million is an O, and none of them lasts long.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.
  • 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 7.2 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Vela.
  • 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.

Could we get there?

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

Properties

absmag
-1.118
bv
0.393
constellation
Vel
dist ly
1503.0231
luminosity
243.8934
mag
7.2
name
HD 73882
spect
O8V:
var amplitude
0.09
var designation
NX
var max
7.173
var min
7.263

About HD 73882

HD 73882 is a rare variable star. It lies about 1,503 light-years from Earth, sits in the constellation Vel, shines at apparent magnitude 7.2 and has spectral type O8V:.

Its spectrum reads O8V: — an O-type star — the hottest, rarest main class there is. Fewer than one star in a million is an O, and none of them lasts long.

How to see it

Look for HD 73882 in the constellation Vel. At apparent magnitude 7.2, it is an easy target for binoculars.

Like any astronomical target, HD 73882 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 73882 is a rare variable star

HD 73882 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 6 science badges — Variable star, Distant (over 1,000 light-years), Blazing O-type star, Main-sequence 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.