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Epic variable star 53 EP

HIP 72300

RA 221.7741° · Dec 39.3171° · star

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Score breakdown

· 7 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Dramatic variable (over 2 magnitudes) +20
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Red dwarf +6
  • Variable star +5
  • Cool red M-type star +5
  • A named variable star +3
Total score 53

25 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • Cool red M-type star · +5
  • Deep red star · +8
  • Red dwarf · +6
  • Dramatic variable (over 2 magnitudes) · +20
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads M2e-M6e — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
  • 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 10.4 you'll want a small backyard telescope, over in Boötes.
  • 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 May — 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. ≈ 28.1 million years at Voyager 1's speed (17 km/s).

Properties

absmag
1.938
bv
1.5
constellation
Boo
dist ly
1598.804
luminosity
14.615
mag
10.39
name
HIP 72300
spect
M2e-M6e
var amplitude
2.76
var designation
RR
var max
9.393
var min
12.153

About HIP 72300

HIP 72300 is an epic variable star. It lies about 1,598.8 light-years from Earth, sits in the constellation Boo, shines at apparent magnitude 10.39 and has spectral type M2e-M6e.

Its spectrum reads M2e-M6e — 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 HIP 72300 in the constellation Boo. At apparent magnitude 10.39, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 72300 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 HIP 72300 is an epic variable star

HIP 72300 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 7 science badges — Variable star, Distant (over 1,000 light-years), Cool red M-type star, Deep red star, Red dwarf, Dramatic variable (over 2 magnitudes) 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.