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Common star 15 EP

HR 8423

RA 329.5561° · Dec 82.8695° · star

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Score breakdown

· 4 badges
15 pts · Common
Common 22 pts → Uncommon
  • Subgiant (leaving the main sequence) +5
  • Never sets (northern circumpolar) +4
  • Star +3
  • Yellow-white F-type star +3
Total score 15

7 more points to reach Uncommon.

Badges

  • Star · +3
  • Never sets (northern circumpolar) · +4
  • Yellow-white F-type star · +3
  • Subgiant (leaving the main sequence) · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads F6IV-V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 6.9 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cepheus.
  • 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 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. ≈ 1.7 million years at Voyager 1's speed (17 km/s).

Properties

absmag
4.541
bv
0.517
constellation
Cep
dist ly
97.5347
luminosity
1.3292
mag
6.92
name
HR 8423
spect
F6IV-V

About HR 8423

HR 8423 is a common star. It lies about 97.5 light-years from Earth, sits in the constellation Cep, shines at apparent magnitude 6.92 and has spectral type F6IV-V.

Its spectrum reads F6IV-V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HR 8423 in the constellation Cep. At apparent magnitude 6.92, it is an easy target for binoculars.

Like any astronomical target, HR 8423 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 8423 is a common star

HR 8423 scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Never sets (northern circumpolar), Yellow-white F-type star and Subgiant (leaving the main sequence) — 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.