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Trash star 8 EP

HD 216781

RA 344.0506° · Dec -36.6805° · 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 F6/F7V — 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 8.3 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Grus.
  • 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 September — 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. ≈ 4.4 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 394.5 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
3.885
bv
0.5
constellation
Gru
dist ly
252.6382
luminosity
2.4322
mag
8.33
name
HD 216781
spect
F6/F7V

About HD 216781

HD 216781 is a trash star. It lies about 252.6 light-years from Earth, sits in the constellation Gru, shines at apparent magnitude 8.33 and has spectral type F6/F7V.

Its spectrum reads F6/F7V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 216781 in the constellation Gru. At apparent magnitude 8.33, it is an easy target for binoculars.

Like any astronomical target, HD 216781 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 216781 is a trash star

HD 216781 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.