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Rare star 38 EP

HD 331777

RA 300.7984° · Dec 31.9194° · star

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Score breakdown

· 5 badges
38 pts · Rare
Rare 50 pts → Epic
  • Supergiant +18
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Star +3
  • Yellow-white F-type star +3
Total score 38

12 more points to reach Epic.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Yellow-white F-type star · +3
  • Supergiant · +18
  • Deep red star · +8

Trivia

What it actually is

  • Spectral class. Its spectrum reads F8Iab: — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • 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 8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cygnus.
  • 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 July — 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. ≈ 49.8 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-1.687
bv
1.514
constellation
Cyg
dist ly
2836.1391
luminosity
411.9078
mag
8.01
name
HD 331777
spect
F8Iab:

About HD 331777

HD 331777 is a rare star. It lies about 2,836.1 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 8.01 and has spectral type F8Iab:.

Its spectrum reads F8Iab: — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 331777 in the constellation Cyg. At apparent magnitude 8.01, it is an easy target for binoculars.

Like any astronomical target, HD 331777 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 331777 is a rare star

HD 331777 scores 38 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Distant (over 1,000 light-years), Yellow-white F-type star, Supergiant and Deep red 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.