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Trash star 11 EP

HIP 15654

RA 50.3760° · Dec 48.4939° · 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 F1IVn — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.

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 9.2 you'll want a small backyard telescope, over in Perseus.
  • 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 November — 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. ≈ 8.8 million years at Voyager 1's speed (17 km/s).

Properties

absmag
3.241
bv
0.38
constellation
Per
dist ly
500.2392
luminosity
4.4015
mag
9.17
name
HIP 15654
spect
F1IVn

About HIP 15654

HIP 15654 is a trash star. It lies about 500.2 light-years from Earth, sits in the constellation Per, shines at apparent magnitude 9.17 and has spectral type F1IVn.

Its spectrum reads F1IVn — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HIP 15654 in the constellation Per. At apparent magnitude 9.17, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 15654 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 HIP 15654 is a trash star

HIP 15654 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.