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Uncommon variable star 22 EP

HD 179890

RA 288.0203° · Dec 46.3241° · star

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Score breakdown

· 5 badges
22 pts · Uncommon
Uncommon 34 pts → Rare
  • Sun-like G-type star +8
  • Variable star +5
  • Gently variable +4
  • A named variable star +3
  • Main-sequence star +2
Total score 22

12 more points to reach Rare.

Badges

  • Variable star · +5
  • Sun-like G-type star · +8
  • Main-sequence star · +2
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads G0V — a G-type star: the very same spectral class as our own Sun.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.
  • 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 9.3 you'll want a small backyard telescope, over in Lyra.
  • 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. Hopelessly far for any craft humanity can build today.

Properties

absmag
3.777
bv
0.574
constellation
Lyr
dist ly
424.6822
luminosity
2.6866
mag
9.35
name
HD 179890
spect
G0V
var amplitude
0.24
var designation
FL
var max
9.308
var min
9.548

About HD 179890

HD 179890 is an uncommon variable star. It lies about 424.7 light-years from Earth, sits in the constellation Lyr, shines at apparent magnitude 9.35 and has spectral type G0V.

Its spectrum reads G0V — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 179890 in the constellation Lyr. At apparent magnitude 9.35, a small backyard telescope will bring it into view.

Like any astronomical target, HD 179890 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 179890 is an uncommon variable star

HD 179890 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Sun-like G-type star, Main-sequence 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.