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Trash star 14 EP

HD 240991

RA 77.0155° · Dec 3.3086° · star

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Score breakdown

· 4 badges
14 pts · Trash
Trash 15 pts → Common
  • In Orion's hunting ground +6
  • Star +3
  • Yellow-white F-type star +3
  • Main-sequence star +2
Total score 14

1 more point to reach Common.

Badges

  • Star · +3
  • In Orion's hunting ground · +6
  • Yellow-white F-type star · +3
  • Main-sequence star · +2

Trivia

What it actually is

  • Spectral class. Its spectrum reads F8V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

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 10.8 you'll want a small backyard telescope, over in Orion.
  • 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 December — 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).

Properties

absmag
5.352
bv
0.604
constellation
Ori
dist ly
404.6601
luminosity
0.6298
mag
10.82
name
HD 240991
spect
F8V

About HD 240991

HD 240991 is a trash star. It lies about 404.7 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 10.82 and has spectral type F8V.

Its spectrum reads F8V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 240991 in the constellation Ori. At apparent magnitude 10.82, a small backyard telescope will bring it into view.

Like any astronomical target, HD 240991 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 240991 is a trash star

HD 240991 scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Star, In Orion's hunting ground, 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.