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Common star 16 EP

HD 121781

RA 209.1926° · Dec 35.4563° · star

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Score breakdown

· 4 badges
16 pts · Common
Common 22 pts → Uncommon
  • Distant (over 1,000 light-years) +6
  • White A-type star +5
  • Star +3
  • Main-sequence star +2
Total score 16

6 more points to reach Uncommon.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • White A-type star · +5
  • Main-sequence star · +2

Trivia

What it actually is

  • Spectral class. Its spectrum reads A1V — 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 on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

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 9 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Canes Venatici.
  • 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 April — 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. ≈ 21 million years at Voyager 1's speed (17 km/s).

Properties

absmag
1.141
bv
0.068
constellation
CVn
dist ly
1194.7107
luminosity
30.4509
mag
8.96
name
HD 121781
spect
A1V

About HD 121781

HD 121781 is a common star. It lies about 1,194.7 light-years from Earth, sits in the constellation CVn, shines at apparent magnitude 8.96 and has spectral type A1V.

Its spectrum reads A1V — 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 121781 in the constellation CVn. At apparent magnitude 8.96, it is an easy target for binoculars.

Like any astronomical target, HD 121781 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 121781 is a common star

HD 121781 scores 16 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Distant (over 1,000 light-years), White A-type star and Main-sequence 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.