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Common star 19 EP

HD 188787

RA 299.5556° · Dec -36.6869° · star

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Score breakdown

· 5 badges
19 pts · Common
Common 22 pts → Uncommon
  • Toward the galactic centre +8
  • Star +3
  • On the zodiac +3
  • Yellow-white F-type star +3
  • Main-sequence star +2
Total score 19

3 more points to reach Uncommon.

Badges

  • Star · +3
  • Toward the galactic centre · +8
  • On the zodiac · +3
  • Yellow-white F-type star · +3
  • Main-sequence star · +2

Trivia

What it actually is

  • Spectral class. Its spectrum reads F2V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

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 it is just past naked-eye reach — ordinary binoculars will pull it in, 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 July — 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. ≈ 4.2 million years at Voyager 1's speed (17 km/s).

Properties

absmag
2.638
bv
0.371
constellation
Sgr
dist ly
237.5499
luminosity
7.6701
mag
6.95
name
HD 188787
spect
F2V

About HD 188787

HD 188787 is a common star. It lies about 237.5 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 6.95 and has spectral type F2V.

Its spectrum reads F2V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 188787 in the constellation Sgr. At apparent magnitude 6.95, it is an easy target for binoculars.

Like any astronomical target, HD 188787 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 188787 is a common star

HD 188787 scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

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