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Rare star 40 EP

HD 49798

RA 102.0196° · Dec -44.3162° · star

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Score breakdown

· 4 badges
40 pts · Rare
Rare 50 pts → Epic
  • Blazing O-type star +26
  • Distant (over 1,000 light-years) +6
  • Blue-white star +5
  • Star +3
Total score 40

10 more points to reach Epic.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Blazing O-type star · +26
  • Blue-white star · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads O6 — 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.

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 8.3 it is just past naked-eye reach — ordinary binoculars will pull it in, 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.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 47.8 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 4.2 million years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
-1.324
bv
-0.27
constellation
Pup
dist ly
2717.9666
luminosity
294.8492
mag
8.28
name
HD 49798
spect
O6

About HD 49798

HD 49798 is a rare star. It lies about 2,718 light-years from Earth, sits in the constellation Pup, shines at apparent magnitude 8.28 and has spectral type O6.

Its spectrum reads O6 — 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 49798 in the constellation Pup. At apparent magnitude 8.28, it is an easy target for binoculars.

Like any astronomical target, HD 49798 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 49798 is a rare star

HD 49798 scores 40 points on Spacedle's rarity scale, which places it in the rare tier. Another 10 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Distant (over 1,000 light-years), Blazing O-type star and Blue-white 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.