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Rare star 40 EP

GL Gl 643

RA 253.8551° · Dec -8.3226° · star

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Score breakdown

· 6 badges
40 pts · Rare
Rare 50 pts → Epic
  • Nearby (<25 ly) +12
  • Deep red star +8
  • Red dwarf +6
  • Intrinsically feeble (Mv > +12) +6
  • Cool red M-type star +5
  • Star +3
Total score 40

10 more points to reach Epic.

Badges

  • Star · +3
  • Nearby (<25 ly) · +12
  • Cool red M-type star · +5
  • Deep red star · +8
  • Red dwarf · +6
  • Intrinsically feeble (Mv > +12) · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads M4 — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 11.7 you'll want a small backyard telescope, over in Ophiuchus.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • 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. ≈ 384.9 thousand years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 34.2 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
12.595
bv
1.7
constellation
Oph
dist ly
21.9014
luminosity
0.0008
mag
11.73
name
GL Gl 643
spect
M4

About GL Gl 643

GL Gl 643 is a rare star. It lies about 21.9 light-years from Earth, sits in the constellation Oph, shines at apparent magnitude 11.73 and has spectral type M4.

Its spectrum reads M4 — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

How to see it

Look for GL Gl 643 in the constellation Oph. At apparent magnitude 11.73, a small backyard telescope will bring it into view.

Like any astronomical target, GL Gl 643 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 GL Gl 643 is a rare star

GL Gl 643 scores 40 points on Spacedle's rarity scale, which places it in the rare tier. Another 10 points would lift it into a rarer tier.

That score comes from 6 science badges — Star, Nearby (<25 ly), Cool red M-type star, Deep red star, Red dwarf and Intrinsically feeble (Mv > +12) — 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.