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Uncommon star 31 EP

Pi 1Gru

RA 335.6842° · Dec -45.9479° · star

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Score breakdown

· 3 badges
31 pts · Uncommon
Uncommon 34 pts → Rare
  • S-type star (zirconium giant) +20
  • Deep red star +8
  • Star +3
Total score 31

3 more points to reach Rare.

Badges

  • Star · +3
  • S-type star (zirconium giant) · +20
  • Deep red star · +8

Trivia

What it actually is

  • Spectral class. Its spectrum reads S57: — an S-type giant, its atmosphere laced with zirconium dredged up from the fusion going on below.

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 6.4 it is just past naked-eye reach — ordinary binoculars will pull it in, 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 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. ≈ 9.3 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 830.8 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
0.357
bv
2.231
constellation
Gru
dist ly
532.0651
luminosity
62.6902
mag
6.42
name
Pi 1Gru
spect
S57:

About Pi 1Gru

Pi 1Gru is an uncommon star. It lies about 532.1 light-years from Earth, sits in the constellation Gru, shines at apparent magnitude 6.42 and has spectral type S57:.

Its spectrum reads S57: — an S-type giant, its atmosphere laced with zirconium dredged up from the fusion going on below.

How to see it

Look for Pi 1Gru in the constellation Gru. At apparent magnitude 6.42, it is an easy target for binoculars.

Like any astronomical target, Pi 1Gru 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 Pi 1Gru is an uncommon star

Pi 1Gru scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, S-type star (zirconium giant) and Deep red 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.