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Rare star 41 EP

18Ome Cap

RA 312.9554° · Dec -26.9191° · star

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Score breakdown

· 7 badges
41 pts · Rare
Rare 50 pts → Epic
  • Intrinsically luminous (Mv < −2) +10
  • Naked-eye visible +8
  • Deep red star +8
  • Giant star +6
  • Star +3
  • On the zodiac +3
  • Orange K-type star +3
Total score 41

9 more points to reach Epic.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • On the zodiac · +3
  • Orange K-type star · +3
  • Giant star · +6
  • Deep red star · +8
  • Intrinsically luminous (Mv < −2) · +10

Trivia

What it actually is

  • Spectral class. Its spectrum reads K4III — 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 giant. It has already exhausted its core hydrogen and swollen up enormously in response.

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 4.1 you can see it with your own eyes from a dark site, over in Capricornus.
  • 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 August — 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. ≈ 14.8 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-2.941
bv
1.633
constellation
Cap
dist ly
842.7803
luminosity
1307.3745
mag
4.12
name
18Ome Cap
spect
K4III

About 18Ome Cap

18Ome Cap is a rare star. It lies about 842.8 light-years from Earth, sits in the constellation Cap, shines at apparent magnitude 4.12 and has spectral type K4III.

Its spectrum reads K4III — 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 18Ome Cap in the constellation Cap. At apparent magnitude 4.12, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 18Ome Cap 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 18Ome Cap is a rare star

18Ome Cap scores 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 9 points would lift it into a rarer tier.

That score comes from 7 science badges — Star, Naked-eye visible, On the zodiac, Orange K-type star, Giant star, Deep red star and Intrinsically luminous (Mv < −2) — 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.