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Uncommon star 33 EP

70Xi Ori

RA 92.9850° · Dec 14.2088° · star

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Score breakdown

· 6 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • In Orion's hunting ground +6
  • Hot blue B-type star +6
  • Subgiant (leaving the main sequence) +5
  • Blue-white star +5
  • Star +3
Total score 33

1 more point to reach Rare.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • In Orion's hunting ground · +6
  • Hot blue B-type star · +6
  • Subgiant (leaving the main sequence) · +5
  • Blue-white star · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads B3IV — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.
  • Where it is in life. It is a subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.

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 4.5 you can see it with your own eyes from a dark site, over in Orion.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around December — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 10.7 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-1.9
bv
-0.18
constellation
Ori
dist ly
607.3667
luminosity
501.1872
mag
4.45
name
70Xi Ori
spect
B3IV

About 70Xi Ori

70Xi Ori is an uncommon star. It lies about 607.4 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 4.45 and has spectral type B3IV.

Its spectrum reads B3IV — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.

How to see it

Look for 70Xi Ori in the constellation Ori. At apparent magnitude 4.45, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 70Xi Ori 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 70Xi Ori is an uncommon star

70Xi Ori scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 6 science badges — Star, Naked-eye visible, In Orion's hunting ground, Hot blue B-type star, Subgiant (leaving the main sequence) 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.