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Common star 16 EP

HD 20805

RA 49.8803° · Dec -42.5704° · star

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Score breakdown

· 3 badges
16 pts · Common
Common 22 pts → Uncommon
  • Sun-like G-type star +8
  • Subgiant (leaving the main sequence) +5
  • Star +3
Total score 16

6 more points to reach Uncommon.

Badges

  • Star · +3
  • Sun-like G-type star · +8
  • Subgiant (leaving the main sequence) · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads G8/K0IV — a G-type star: the very same spectral class as our own Sun.

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 7.8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Eridanus.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around November — 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. ≈ 10.9 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 966.3 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
1.459
bv
1.013
constellation
Eri
dist ly
618.8918
luminosity
22.7196
mag
7.85
name
HD 20805
spect
G8/K0IV

About HD 20805

HD 20805 is a common star. It lies about 618.9 light-years from Earth, sits in the constellation Eri, shines at apparent magnitude 7.85 and has spectral type G8/K0IV.

Its spectrum reads G8/K0IV — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 20805 in the constellation Eri. At apparent magnitude 7.85, it is an easy target for binoculars.

Like any astronomical target, HD 20805 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 20805 is a common star

HD 20805 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 3 science badges — Star, Sun-like G-type star and Subgiant (leaving the main sequence) — 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.