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Trash star 14 EP

22 Boo

RA 216.6140° · Dec 19.2269° · star

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Score breakdown

· 3 badges
14 pts · Trash
Trash 15 pts → Common
  • Naked-eye visible +8
  • Star +3
  • Yellow-white F-type star +3
Total score 14

1 more point to reach Common.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • Yellow-white F-type star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F0m — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

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 5.4 you can see it with your own eyes from a dark site, over in Boötes.
  • 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 April — 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. ≈ 5.1 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 453.9 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
0.65
bv
0.231
constellation
Boo
dist ly
290.6918
luminosity
47.863
mag
5.4
name
22 Boo
spect
F0m

About 22 Boo

22 Boo is a trash star. It lies about 290.7 light-years from Earth, sits in the constellation Boo, shines at apparent magnitude 5.4 and has spectral type F0m.

Its spectrum reads F0m — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for 22 Boo in the constellation Boo. At apparent magnitude 5.4, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 22 Boo 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 22 Boo is a trash star

22 Boo scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Star, Naked-eye visible and Yellow-white F-type 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.