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Uncommon star 32 EP

Zubenelgenubi

RA 222.7197° · Dec -16.0418° · star

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Score breakdown

· 6 badges
32 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • Has a proper name +8
  • White A-type star +5
  • Subgiant (leaving the main sequence) +5
  • Star +3
  • On the zodiac +3
Total score 32

2 more points to reach Rare.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • Has a proper name · +8
  • On the zodiac · +3
  • White A-type star · +5
  • Subgiant (leaving the main sequence) · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads A3IV — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • Where it is in life. It is a subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.

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 2.8 you can see it with your own eyes from a dark site, over in Libra.
  • 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 May — 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. ≈ 1.3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
0.919
bv
0.147
constellation
Lib
dist ly
75.7973
luminosity
37.3594
mag
2.75
name
Zubenelgenubi
named
yes
spect
A3IV

About Zubenelgenubi

Zubenelgenubi is an uncommon star. It lies about 75.8 light-years from Earth, sits in the constellation Lib, shines at apparent magnitude 2.75 and has spectral type A3IV.

Its spectrum reads A3IV — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for Zubenelgenubi in the constellation Lib. At apparent magnitude 2.75, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Zubenelgenubi 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 Zubenelgenubi is an uncommon star

Zubenelgenubi scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 6 science badges — Star, Naked-eye visible, Has a proper name, On the zodiac, White A-type star and Subgiant (leaving the main sequence) — 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.