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Trash star 8 EP

HD 169504

RA 276.7668° · Dec -43.5241° · star

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Score breakdown

· 3 badges
8 pts · Trash
Trash 15 pts → Common
  • Star +3
  • Yellow-white F-type star +3
  • Main-sequence star +2
Total score 8

7 more points to reach Common.

Badges

  • Star · +3
  • Yellow-white F-type star · +3
  • Main-sequence star · +2

Trivia

What it actually is

  • Spectral class. Its spectrum reads F3/F5V — 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 Corona Australis.
  • 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 June — 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. ≈ 11.3 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 1 million years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
3.339
bv
0.459
constellation
CrA
dist ly
642.0394
luminosity
4.0216
mag
9.81
name
HD 169504
spect
F3/F5V

About HD 169504

HD 169504 is a trash star. It lies about 642 light-years from Earth, sits in the constellation CrA, shines at apparent magnitude 9.81 and has spectral type F3/F5V.

Its spectrum reads F3/F5V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 169504 in the constellation CrA. At apparent magnitude 9.81, a small backyard telescope will bring it into view.

Like any astronomical target, HD 169504 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 169504 is a trash star

HD 169504 scores 8 points on Spacedle's rarity scale, which places it in the trash tier. Another 7 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Yellow-white F-type star and Main-sequence 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.