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Epic star 53 EP

7 Sgr

RA 270.7129° · Dec -24.2825° · star

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Score breakdown

· 8 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Bright giant +12
  • Intrinsically luminous (Mv < −2) +10
  • Naked-eye visible +8
  • Toward the galactic centre +8
  • Distant (over 1,000 light-years) +6
  • Star +3
  • On the zodiac +3
  • Yellow-white F-type star +3
Total score 53

25 more points to reach Anomaly.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Naked-eye visible · +8
  • Toward the galactic centre · +8
  • On the zodiac · +3
  • Yellow-white F-type star · +3
  • Bright giant · +12
  • Intrinsically luminous (Mv < −2) · +10

Trivia

What it actually is

  • Spectral class. Its spectrum reads F2/F3II/III — an F-type star — a little hotter, whiter and shorter-lived than the 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 5.4 you can see it with your own eyes from a dark site, 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. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 19 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 1.7 million years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
-2.23
bv
0.495
constellation
Sgr
dist ly
1079.9867
luminosity
679.2036
mag
5.37
name
7 Sgr
spect
F2/F3II/III

About 7 Sgr

7 Sgr is an epic star. It lies about 1,080 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 5.37 and has spectral type F2/F3II/III.

Its spectrum reads F2/F3II/III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for 7 Sgr in the constellation Sgr. At apparent magnitude 5.37, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 7 Sgr 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 7 Sgr is an epic star

7 Sgr scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

That score comes from 8 science badges — Star, Distant (over 1,000 light-years), Naked-eye visible, Toward the galactic centre, On the zodiac, Yellow-white F-type star, Bright giant and Intrinsically luminous (Mv < −2) — 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.