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Rare star 37 EP

Tonatiuh

RA 181.3118° · Dec 76.9057° · star

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Score breakdown

· 6 badges
37 pts · Rare
Rare 50 pts → Epic
  • Naked-eye visible +8
  • Has a proper name +8
  • Sun-like G-type star +8
  • Giant star +6
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 37

13 more points to reach Epic.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • Has a proper name · +8
  • Never sets (northern circumpolar) · +4
  • Sun-like G-type star · +8
  • Giant star · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads G9III — a G-type star: the very same spectral class as our own Sun.
  • Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.

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 5.8 you can see it with your own eyes from a dark site, over in Camelopardalis.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
  • Best time of year. It stands highest in the middle of the night around March — 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. ≈ 5.6 million years at Voyager 1's speed (17 km/s).

Properties

absmag
0.844
bv
1.029
constellation
Cam
dist ly
316.6564
luminosity
40.0313
mag
5.78
name
Tonatiuh
named
yes
spect
G9III

About Tonatiuh

Tonatiuh is a rare star. It lies about 316.7 light-years from Earth, sits in the constellation Cam, shines at apparent magnitude 5.78 and has spectral type G9III.

Its spectrum reads G9III — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for Tonatiuh in the constellation Cam. At apparent magnitude 5.78, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Tonatiuh 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 Tonatiuh is a rare star

Tonatiuh scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.

That score comes from 6 science badges — Star, Naked-eye visible, Has a proper name, Never sets (northern circumpolar), Sun-like G-type star and Giant 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.