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Common star 21 EP

HR 3633

RA 138.5135° · Dec 71.6558° · star

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Score breakdown

· 4 badges
21 pts · Common
Common 22 pts → Uncommon
  • Sun-like G-type star +8
  • Giant star +6
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 21

1 more point to reach Uncommon.

Badges

  • Star · +3
  • Never sets (northern circumpolar) · +4
  • Sun-like G-type star · +8
  • Giant star · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads G8III-IV — 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 6.5 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Ursa Major.
  • 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 February — 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. ≈ 8.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
0.679
bv
0.962
constellation
UMa
dist ly
480.3476
luminosity
46.6015
mag
6.52
name
HR 3633
spect
G8III-IV

About HR 3633

HR 3633 is a common star. It lies about 480.3 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 6.52 and has spectral type G8III-IV.

Its spectrum reads G8III-IV — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HR 3633 in the constellation UMa. At apparent magnitude 6.52, it is an easy target for binoculars.

Like any astronomical target, HR 3633 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 HR 3633 is a common star

HR 3633 scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Star, 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.