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Common variable star 18 EP

HD 79680

RA 139.0185° · Dec 20.0732° · star

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Score breakdown

· 5 badges
18 pts · Common
Common 22 pts → Uncommon
  • Variable star +5
  • Gently variable +4
  • On the zodiac +3
  • Yellow-white F-type star +3
  • A named variable star +3
Total score 18

4 more points to reach Uncommon.

Badges

  • Variable star · +5
  • On the zodiac · +3
  • Yellow-white F-type star · +3
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.

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 8.7 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cancer.
  • 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 February — 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. ≈ 10.7 million years at Voyager 1's speed (17 km/s).

Properties

absmag
2.372
bv
0.34
constellation
Cnc
dist ly
609.6374
luminosity
9.7994
mag
8.73
name
HD 79680
spect
F
var amplitude
0.11
var designation
GN
var max
8.683
var min
8.793

About HD 79680

HD 79680 is a common variable star. It lies about 609.6 light-years from Earth, sits in the constellation Cnc, shines at apparent magnitude 8.73 and has spectral type F.

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

How to see it

Look for HD 79680 in the constellation Cnc. At apparent magnitude 8.73, it is an easy target for binoculars.

Like any astronomical target, HD 79680 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 79680 is a common variable star

HD 79680 scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, On the zodiac, Yellow-white F-type star, Gently variable and A named variable 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.