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Uncommon star 27 EP

HD 161681

RA 266.9359° · Dec -18.9307° · star

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Score breakdown

· 5 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Toward the galactic centre +8
  • Sun-like G-type star +8
  • Subgiant (leaving the main sequence) +5
  • Star +3
  • On the zodiac +3
Total score 27

7 more points to reach Rare.

Badges

  • Star · +3
  • Toward the galactic centre · +8
  • On the zodiac · +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 9.2 you'll want a small backyard telescope, over in Sagittarius.
  • 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 June — 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. ≈ 15 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 1.3 million years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
2.09
bv
1.386
constellation
Sgr
dist ly
853.8115
luminosity
12.7057
mag
9.18
name
HD 161681
spect
G8/K0IV

About HD 161681

HD 161681 is an uncommon star. It lies about 853.8 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 9.18 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 161681 in the constellation Sgr. At apparent magnitude 9.18, a small backyard telescope will bring it into view.

Like any astronomical target, HD 161681 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 161681 is an uncommon star

HD 161681 scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Toward the galactic centre, On the zodiac, 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.