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Trash star 13 EP

HD 217684

RA 345.6575° · Dec -18.5417° · star

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Score breakdown

· 4 badges
13 pts · Trash
Trash 15 pts → Common
  • White A-type star +5
  • Star +3
  • On the zodiac +3
  • Main-sequence star +2
Total score 13

2 more points to reach Common.

Badges

  • Star · +3
  • On the zodiac · +3
  • White A-type star · +5
  • Main-sequence star · +2

Trivia

What it actually is

  • Spectral class. Its spectrum reads A2/A3V — 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 6.8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Aquarius.
  • 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 September — 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. ≈ 5.8 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 511.3 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
1.771
bv
1
constellation
Aqr
dist ly
327.4658
luminosity
17.0451
mag
6.78
name
HD 217684
spect
A2/A3V

About HD 217684

HD 217684 is a trash star. It lies about 327.5 light-years from Earth, sits in the constellation Aqr, shines at apparent magnitude 6.78 and has spectral type A2/A3V.

Its spectrum reads A2/A3V — 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 217684 in the constellation Aqr. At apparent magnitude 6.78, it is an easy target for binoculars.

Like any astronomical target, HD 217684 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 217684 is a trash star

HD 217684 scores 13 points on Spacedle's rarity scale, which places it in the trash tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, On the zodiac, White A-type star and Main-sequence 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.