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Epic variable star 50 EP

46Ups Sgr

RA 290.4318° · Dec -15.9550° · star

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Score breakdown

· 9 badges
50 pts · Epic
Epic 78 pts → Anomaly
  • Intrinsically luminous (Mv < −2) +10
  • Naked-eye visible +8
  • Toward the galactic centre +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Gently variable +4
  • On the zodiac +3
  • Yellow-white F-type star +3
  • A named variable star +3
Total score 50

28 more points to reach Anomaly.

Badges

  • Variable star · +5
  • 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
  • Intrinsically luminous (Mv < −2) · +10
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F2p — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.

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 4.5 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 July — 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. ≈ 31.3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-4.168
bv
0.079
constellation
Sgr
dist ly
1782.2733
luminosity
4047.6225
mag
4.52
name
46Ups Sgr
spect
F2p
var amplitude
0.15
var designation
Ups
var max
4.447
var min
4.597

About 46Ups Sgr

46Ups Sgr is an epic variable star. It lies about 1,782.3 light-years from Earth, sits in the constellation Sgr, shines at apparent magnitude 4.52 and has spectral type F2p.

Its spectrum reads F2p — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for 46Ups Sgr in the constellation Sgr. At apparent magnitude 4.52, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 46Ups 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 46Ups Sgr is an epic variable star

46Ups Sgr scores 50 points on Spacedle's rarity scale, which places it in the epic tier. Another 28 points would lift it into a rarer tier.

That score comes from 9 science badges — Variable star, Distant (over 1,000 light-years), Naked-eye visible, Toward the galactic centre, On the zodiac, Yellow-white F-type star, Intrinsically luminous (Mv < −2) and Gently variable — 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.