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Common star 16 EP

Tau3Gru

RA 344.1992° · Dec -47.9692° · star

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Score breakdown

· 3 badges
16 pts · Common
Common 22 pts → Uncommon
  • Naked-eye visible +8
  • White A-type star +5
  • Star +3
Total score 16

6 more points to reach Uncommon.

Badges

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

Trivia

What it actually is

  • Spectral class. Its spectrum reads Am... — 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 5.7 you can see it with your own eyes from a dark site, over in Grus.
  • 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 September — 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. ≈ 4.3 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 380 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
1.356
bv
0.226
constellation
Gru
dist ly
243.4001
luminosity
24.9804
mag
5.72
name
Tau3Gru
spect
Am...

About Tau3Gru

Tau3Gru is a common star. It lies about 243.4 light-years from Earth, sits in the constellation Gru, shines at apparent magnitude 5.72 and has spectral type Am....

Its spectrum reads Am... — 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 Tau3Gru in the constellation Gru. At apparent magnitude 5.72, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Tau3Gru 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 Tau3Gru is a common star

Tau3Gru scores 16 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Naked-eye visible 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.