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Trash star 11 EP

HD 218905

RA 348.0884° · Dec -55.4897° · star

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Score breakdown

· 3 badges
11 pts · Trash
Trash 15 pts → Common
  • Subgiant (leaving the main sequence) +5
  • Star +3
  • Yellow-white F-type star +3
Total score 11

4 more points to reach Common.

Badges

  • Star · +3
  • Yellow-white F-type star · +3
  • Subgiant (leaving the main sequence) · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads F6/F7IV/V — 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 10.2 you'll want a small backyard telescope, 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. ≈ 7.1 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 635 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
4.701
bv
0.567
constellation
Gru
dist ly
406.6784
luminosity
1.1471
mag
10.18
name
HD 218905
spect
F6/F7IV/V

About HD 218905

HD 218905 is a trash star. It lies about 406.7 light-years from Earth, sits in the constellation Gru, shines at apparent magnitude 10.18 and has spectral type F6/F7IV/V.

Its spectrum reads F6/F7IV/V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 218905 in the constellation Gru. At apparent magnitude 10.18, a small backyard telescope will bring it into view.

Like any astronomical target, HD 218905 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 218905 is a trash star

HD 218905 scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Yellow-white F-type star and Subgiant (leaving the main sequence) — 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.