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Rare star 36 EP

HD 8159

RA 20.5473° · Dec 58.2896° · star

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Score breakdown

· 5 badges
36 pts · Rare
Rare 50 pts → Epic
  • Supergiant +18
  • Distant (over 1,000 light-years) +6
  • White A-type star +5
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 36

14 more points to reach Epic.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Never sets (northern circumpolar) · +4
  • White A-type star · +5
  • Supergiant · +18

Trivia

What it actually is

  • Spectral class. Its spectrum reads A1Iab — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • Where it is in life. It is a supergiant. Drop it where the Sun is and its surface would engulf the inner planets.

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 7.8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cassiopeia.
  • 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. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 43.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-1.607
bv
0.364
constellation
Cas
dist ly
2470.8789
luminosity
382.6485
mag
7.79
name
HD 8159
spect
A1Iab

About HD 8159

HD 8159 is a rare star. It lies about 2,470.9 light-years from Earth, sits in the constellation Cas, shines at apparent magnitude 7.79 and has spectral type A1Iab.

Its spectrum reads A1Iab — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for HD 8159 in the constellation Cas. At apparent magnitude 7.79, it is an easy target for binoculars.

Like any astronomical target, HD 8159 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 HD 8159 is a rare star

HD 8159 scores 36 points on Spacedle's rarity scale, which places it in the rare tier. Another 14 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Distant (over 1,000 light-years), Never sets (northern circumpolar), White A-type star and Supergiant — 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.