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Trash star 12 EP

HD 198797

RA 312.8656° · Dec 39.3923° · star

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Score breakdown

· 3 badges
12 pts · Trash
Trash 15 pts → Common
  • Giant star +6
  • Star +3
  • Yellow-white F-type star +3
Total score 12

3 more points to reach Common.

Badges

  • Star · +3
  • Yellow-white F-type star · +3
  • Giant star · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads F5III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.

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 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cygnus.
  • 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 August — 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. ≈ 13.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
1.182
bv
0.48
constellation
Cyg
dist ly
763.8313
luminosity
29.3224
mag
8.03
name
HD 198797
spect
F5III

About HD 198797

HD 198797 is a trash star. It lies about 763.8 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 8.03 and has spectral type F5III.

Its spectrum reads F5III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 198797 in the constellation Cyg. At apparent magnitude 8.03, it is an easy target for binoculars.

Like any astronomical target, HD 198797 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 198797 is a trash star

HD 198797 scores 12 points on Spacedle's rarity scale, which places it in the trash tier. Another 3 points would lift it into a rarer tier.

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