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Rare star 42 EP

Guniibuu B

RA 258.8360° · Dec -26.6032° · star

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Score breakdown

· 7 badges
42 pts · Rare
Rare 50 pts → Epic
  • Nearby (<25 ly) +12
  • Naked-eye visible +8
  • Has a proper name +8
  • Binary star +6
  • Star +3
  • Orange K-type star +3
  • Main-sequence star +2
Total score 42

8 more points to reach Epic.

Badges

  • Star · +3
  • Nearby (<25 ly) · +12
  • Naked-eye visible · +8
  • Binary star · +6
  • Has a proper name · +8
  • Orange K-type star · +3
  • Main-sequence star · +2

Trivia

What makes it special

  • Not one star but two. It is a binary: two stars orbiting a shared centre of mass. More than half of all the 'stars' you can see are actually multiple systems.

What it actually is

  • Spectral class. Its spectrum reads K1 Ve — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 5.1 you can see it with your own eyes from a dark site, over in Ophiuchus.
  • 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. ≈ 343 thousand years at Voyager 1's speed (17 km/s).

Properties

absmag
6.185
binary
yes
bv
0.85
constellation
Oph
dist ly
19.5211
luminosity
0.2924
mag
5.07
name
Guniibuu B
named
yes
spect
K1 Ve

About Guniibuu B

Guniibuu B is a rare star. It lies about 19.5 light-years from Earth, sits in the constellation Oph, shines at apparent magnitude 5.07 and has spectral type K1 Ve.

It is a binary: two stars orbiting a shared centre of mass. More than half of all the 'stars' you can see are actually multiple systems.

How to see it

Look for Guniibuu B in the constellation Oph. At apparent magnitude 5.07, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Guniibuu B 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 Guniibuu B is a rare star

Guniibuu B scores 42 points on Spacedle's rarity scale, which places it in the rare tier. Another 8 points would lift it into a rarer tier.

That score comes from 7 science badges — Star, Nearby (<25 ly), Naked-eye visible, Binary star, Has a proper name, Orange K-type star and Main-sequence 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.