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Common star 19 EP

7Mu Lib

RA 222.3294° · Dec -14.1490° · star

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Score breakdown

· 4 badges
19 pts · Common
Common 22 pts → Uncommon
  • Naked-eye visible +8
  • White A-type star +5
  • Star +3
  • On the zodiac +3
Total score 19

3 more points to reach Uncommon.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • On the zodiac · +3
  • White A-type star · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads Ap — 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.

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 5.3 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. ≈ 4.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 371.5 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
1.005
bv
0.066
constellation
Lib
dist ly
237.8966
luminosity
34.5144
mag
5.32
name
7Mu Lib
spect
Ap

About 7Mu Lib

7Mu Lib is a common star. It lies about 237.9 light-years from Earth, sits in the constellation Lib, shines at apparent magnitude 5.32 and has spectral type Ap.

Its spectrum reads Ap — 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 7Mu Lib in the constellation Lib. At apparent magnitude 5.32, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 7Mu Lib 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 7Mu Lib is a common star

7Mu Lib scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Naked-eye visible, On the zodiac and White A-type 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.