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Rare star 45 EP

HD 93403

RA 161.4339° · Dec -59.4078° · star

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Score breakdown

· 4 badges
45 pts · Rare
Rare 50 pts → Epic
  • Blazing O-type star +26
  • Intrinsically luminous (Mv < −2) +10
  • Distant (over 1,000 light-years) +6
  • Star +3
Total score 45

5 more points to reach Epic.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Blazing O-type star · +26
  • Intrinsically luminous (Mv < −2) · +10

Trivia

What it actually is

  • Spectral class. Its spectrum reads O5e — 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 7.3 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Carina.
  • 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 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. ≈ 47 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
-2.308
bv
0.219
constellation
Car
dist ly
2673.4097
luminosity
729.7935
mag
7.26
name
HD 93403
spect
O5e

About HD 93403

HD 93403 is a rare star. It lies about 2,673.4 light-years from Earth, sits in the constellation Car, shines at apparent magnitude 7.26 and has spectral type O5e.

Its spectrum reads O5e — 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 93403 in the constellation Car. At apparent magnitude 7.26, it is an easy target for binoculars.

Like any astronomical target, HD 93403 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 93403 is a rare star

HD 93403 scores 45 points on Spacedle's rarity scale, which places it in the rare tier. Another 5 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 Intrinsically luminous (Mv < −2) — 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.