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Trash star 6 EP

HD 109590

RA 189.0224° · Dec -42.3096° · star

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Score breakdown

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

9 more points to reach Common.

Badges

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

Trivia

What it actually is

  • Spectral class. Its spectrum reads sdF2 — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a subdwarf: an old, metal-poor star from the galaxy's early days, a little smaller and fainter than a main-sequence star of the same colour.

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 Centaurus.
  • 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 March — 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. ≈ 5 million years at Voyager 1's speed (17 km/s).

Properties

absmag
3.269
bv
0.449
constellation
Cen
dist ly
286.8565
luminosity
4.2894
mag
7.99
name
HD 109590
spect
sdF2

About HD 109590

HD 109590 is a trash star. It lies about 286.9 light-years from Earth, sits in the constellation Cen, shines at apparent magnitude 7.99 and has spectral type sdF2.

Its spectrum reads sdF2 — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 109590 in the constellation Cen. At apparent magnitude 7.99, it is an easy target for binoculars.

Like any astronomical target, HD 109590 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 109590 is a trash star

HD 109590 scores 6 points on Spacedle's rarity scale, which places it in the trash tier. Another 9 points would lift it into a rarer tier.

That score comes from 2 science badges — Star and Yellow-white F-type 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.