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Common star 21 EP

HD 164589

RA 270.9122° · Dec -39.4053° · star

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Score breakdown

· 4 badges
21 pts · Common
Common 22 pts → Uncommon
  • Deep red star +8
  • Cool red M-type star +5
  • Subgiant (leaving the main sequence) +5
  • Star +3
Total score 21

1 more point to reach Uncommon.

Badges

  • Star · +3
  • Cool red M-type star · +5
  • Subgiant (leaving the main sequence) · +5
  • Deep red star · +8

Trivia

What it actually is

  • Spectral class. Its spectrum reads M0/M1IV — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

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 Corona Australis.
  • 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 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. ≈ 12.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 1.1 million years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
1.39
bv
1.682
constellation
CrA
dist ly
693.9491
luminosity
24.2103
mag
8.03
name
HD 164589
spect
M0/M1IV

About HD 164589

HD 164589 is a common star. It lies about 693.9 light-years from Earth, sits in the constellation CrA, shines at apparent magnitude 8.03 and has spectral type M0/M1IV.

Its spectrum reads M0/M1IV — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

How to see it

Look for HD 164589 in the constellation CrA. At apparent magnitude 8.03, it is an easy target for binoculars.

Like any astronomical target, HD 164589 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 164589 is a common star

HD 164589 scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Star, Cool red M-type star, Subgiant (leaving the main sequence) and Deep red 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.