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Common star 20 EP

HD 220078

RA 350.1883° · Dec 15.0480° · star

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Score breakdown

· 3 badges
20 pts · Common
Common 22 pts → Uncommon
  • Bright giant +12
  • White A-type star +5
  • Star +3
Total score 20

2 more points to reach Uncommon.

Badges

  • Star · +3
  • White A-type star · +5
  • Bright giant · +12

Trivia

What it actually is

  • Spectral class. Its spectrum reads A5II — 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 bright giant, well on its way to the largest stars there are.

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 7.6 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Pegasus.
  • 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 September — 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. ≈ 8.7 million years at Voyager 1's speed (17 km/s).

Properties

absmag
1.734
bv
0.141
constellation
Peg
dist ly
492.6828
luminosity
17.636
mag
7.63
name
HD 220078
spect
A5II

About HD 220078

HD 220078 is a common star. It lies about 492.7 light-years from Earth, sits in the constellation Peg, shines at apparent magnitude 7.63 and has spectral type A5II.

Its spectrum reads A5II — 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 220078 in the constellation Peg. At apparent magnitude 7.63, it is an easy target for binoculars.

Like any astronomical target, HD 220078 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 220078 is a common star

HD 220078 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 3 science badges — Star, White A-type star and Bright giant — 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.