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Trash star 6 EP

HD 186921

RA 298.5747° · Dec -74.3493° · star

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Score breakdown

· 2 badges
6 pts · Trash
Trash 15 pts → Common
  • Star +3
  • Yellow-white F-type star +3
Total score 6

9 more points to reach Common.

Badges

  • Star · +3
  • Yellow-white F-type star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F5w... — 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 9.8 you'll want a small backyard telescope, over in Pavo.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around July — 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. ≈ 13.3 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 1.2 million years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
3.007
bv
0.412
constellation
Pav
dist ly
754.9908
luminosity
5.4601
mag
9.83
name
HD 186921
spect
F5w...

About HD 186921

HD 186921 is a trash star. It lies about 755 light-years from Earth, sits in the constellation Pav, shines at apparent magnitude 9.83 and has spectral type F5w....

Its spectrum reads F5w... — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 186921 in the constellation Pav. At apparent magnitude 9.83, a small backyard telescope will bring it into view.

Like any astronomical target, HD 186921 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 186921 is a trash star

HD 186921 scores 6 points on Spacedle's rarity scale, which places it in the trash tier. Another 9 points would lift it into a rarer tier.

That score comes from 2 science badges — Star 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.