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Common star 18 EP

HD 9638

RA 23.7578° · Dec 29.1007° · star

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Score breakdown

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

4 more points to reach Uncommon.

Badges

  • Star · +3
  • Orange K-type star · +3
  • Bright giant · +12

Trivia

What it actually is

  • Spectral class. Its spectrum reads K2II — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
  • 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 7.8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Triangulum.
  • 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 October — 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. ≈ 13.5 million years at Voyager 1's speed (17 km/s).

Properties

absmag
0.987
bv
1.146
constellation
Tri
dist ly
765.6245
luminosity
35.0913
mag
7.84
name
HD 9638
spect
K2II

About HD 9638

HD 9638 is a common star. It lies about 765.6 light-years from Earth, sits in the constellation Tri, shines at apparent magnitude 7.84 and has spectral type K2II.

Its spectrum reads K2II — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

How to see it

Look for HD 9638 in the constellation Tri. At apparent magnitude 7.84, it is an easy target for binoculars.

Like any astronomical target, HD 9638 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 9638 is a common star

HD 9638 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, Orange K-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.