← Back to dex
Common star 18 EP

HD 155522

RA 266.4658° · Dec -86.2984° · star

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 3 badges
18 pts · Common
Common 22 pts → Uncommon
  • Bright giant +12
  • Star +3
  • Yellow-white F-type star +3
Total score 18

4 more points to reach Uncommon.

Badges

  • Star · +3
  • Yellow-white F-type star · +3
  • Bright giant · +12

Trivia

What it actually is

  • Spectral class. Its spectrum reads F0IIw... — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a bright giant, well on its way to the largest stars there are.

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 9.7 you'll want a small backyard telescope, over in Octans.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around June — 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. ≈ 10.6 million years at Voyager 1's speed (17 km/s).

Properties

absmag
3.372
bv
0.462
constellation
Oct
dist ly
603.9926
luminosity
3.9012
mag
9.71
name
HD 155522
spect
F0IIw...

About HD 155522

HD 155522 is a common star. It lies about 604 light-years from Earth, sits in the constellation Oct, shines at apparent magnitude 9.71 and has spectral type F0IIw....

Its spectrum reads F0IIw... — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 155522 in the constellation Oct. At apparent magnitude 9.71, a small backyard telescope will bring it into view.

Like any astronomical target, HD 155522 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 155522 is a common star

HD 155522 scores 18 points on Spacedle's rarity scale, which places it in the common 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 Bright giant — 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.