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Uncommon star 26 EP

HD 197747

RA 311.6475° · Dec -28.8180° · star

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Score breakdown

· 4 badges
26 pts · Uncommon
Uncommon 34 pts → Rare
  • Bright giant +12
  • Distant (over 1,000 light-years) +6
  • White A-type star +5
  • Star +3
Total score 26

8 more points to reach Rare.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • White A-type star · +5
  • Bright giant · +12

Trivia

What it actually is

  • Spectral class. Its spectrum reads A2/A3II — 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.

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 9.6 you'll want a small backyard telescope, over in Microscopium.
  • 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 August — 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. ≈ 36.3 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 3.2 million years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
0.553
bv
0.234
constellation
Mic
dist ly
2064.2785
luminosity
52.3359
mag
9.56
name
HD 197747
spect
A2/A3II

About HD 197747

HD 197747 is an uncommon star. It lies about 2,064.3 light-years from Earth, sits in the constellation Mic, shines at apparent magnitude 9.56 and has spectral type A2/A3II.

Its spectrum reads A2/A3II — 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 197747 in the constellation Mic. At apparent magnitude 9.56, a small backyard telescope will bring it into view.

Like any astronomical target, HD 197747 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 197747 is an uncommon star

HD 197747 scores 26 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 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 Bright giant — 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.