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Common star 20 EP

12 Tri

RA 37.0416° · Dec 29.6693° · star

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Score breakdown

· 4 badges
20 pts · Common
Common 22 pts → Uncommon
  • Naked-eye visible +8
  • Giant star +6
  • Star +3
  • Yellow-white F-type star +3
Total score 20

2 more points to reach Uncommon.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • Yellow-white F-type star · +3
  • Giant star · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads F0III — an F-type star — a little hotter, whiter and shorter-lived than the 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 5.3 you can see it with your own eyes from a dark site, over in Triangulum.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around October — 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. ≈ 2.9 million years at Voyager 1's speed (17 km/s).

Properties

absmag
1.803
bv
0.311
constellation
Tri
dist ly
162.5092
luminosity
16.5501
mag
5.29
name
12 Tri
spect
F0III

About 12 Tri

12 Tri is a common star. It lies about 162.5 light-years from Earth, sits in the constellation Tri, shines at apparent magnitude 5.29 and has spectral type F0III.

Its spectrum reads F0III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for 12 Tri in the constellation Tri. At apparent magnitude 5.29, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 12 Tri 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 12 Tri is a common star

12 Tri scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Naked-eye visible, Yellow-white F-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.