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Rare variable star 45 EP

4Omi1Ori

RA 73.1332° · Dec 14.2506° · star

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Score breakdown

· 8 badges
45 pts · Rare
Rare 50 pts → Epic
  • Naked-eye visible +8
  • Deep red star +8
  • In Orion's hunting ground +6
  • Red dwarf +6
  • Variable star +5
  • Cool red M-type star +5
  • Gently variable +4
  • A named variable star +3
Total score 45

5 more points to reach Epic.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • In Orion's hunting ground · +6
  • Cool red M-type star · +5
  • Deep red star · +8
  • Red dwarf · +6
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads M3Sv — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.
  • 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 4.7 you can see it with your own eyes from a dark site, over in Orion.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around December — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

absmag
-1.791
bv
1.773
constellation
Ori
dist ly
651.01
luminosity
453.3149
mag
4.71
name
4Omi1Ori
spect
M3Sv
var amplitude
0.09
var designation
Omi-1
var max
4.668
var min
4.758

About 4Omi1Ori

4Omi1Ori is a rare variable star. It lies about 651 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 4.71 and has spectral type M3Sv.

Its spectrum reads M3Sv — 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 4Omi1Ori in the constellation Ori. At apparent magnitude 4.71, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 4Omi1Ori 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 4Omi1Ori is a rare variable star

4Omi1Ori scores 45 points on Spacedle's rarity scale, which places it in the rare tier. Another 5 points would lift it into a rarer tier.

That score comes from 8 science badges — Variable star, Naked-eye visible, In Orion's hunting ground, Cool red M-type star, Deep red star, Red dwarf, Gently variable and A named variable 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.