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Trash star 12 EP

HR 5791

RA 233.7691° · Dec 1.6692° · 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 F0III — 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 6.5 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Serpens.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around May — 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. ≈ 3.2 million years at Voyager 1's speed (17 km/s).

Properties

absmag
2.794
bv
0.281
constellation
Ser
dist ly
183.9572
luminosity
6.6435
mag
6.55
name
HR 5791
spect
F0III

About HR 5791

HR 5791 is a trash star. It lies about 184 light-years from Earth, sits in the constellation Ser, shines at apparent magnitude 6.55 and has spectral type F0III.

Its spectrum reads F0III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HR 5791 in the constellation Ser. At apparent magnitude 6.55, it is an easy target for binoculars.

Like any astronomical target, HR 5791 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 HR 5791 is a trash star

HR 5791 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.