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Epic variable star 68 EP

HR 2190

RA 92.9642° · Dec 21.8682° · star

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Score breakdown

· 9 badges
68 pts · Epic
Epic 78 pts → Anomaly
  • Supergiant +18
  • Intrinsically luminous (Mv < −2) +10
  • Strongly variable +10
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Cool red M-type star +5
  • On the zodiac +3
  • A named variable star +3
Total score 68

10 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • On the zodiac · +3
  • Cool red M-type star · +5
  • Supergiant · +18
  • Deep red star · +8
  • Intrinsically luminous (Mv < −2) · +10
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads M1:Iavar — 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 6.9 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Gemini.
  • 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. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 54.6 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-2.964
bv
2.142
constellation
Gem
dist ly
3106.2478
luminosity
1335.365
mag
6.93
name
HR 2190
spect
M1:Iavar
var amplitude
0.61
var designation
TV
var max
6.415
var min
7.025

About HR 2190

HR 2190 is an epic variable star. It lies about 3,106.2 light-years from Earth, sits in the constellation Gem, shines at apparent magnitude 6.93 and has spectral type M1:Iavar.

Its spectrum reads M1:Iavar — 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 HR 2190 in the constellation Gem. At apparent magnitude 6.93, it is an easy target for binoculars.

Like any astronomical target, HR 2190 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 HR 2190 is an epic variable star

HR 2190 scores 68 points on Spacedle's rarity scale, which places it in the epic tier. Another 10 points would lift it into a rarer tier.

That score comes from 9 science badges — Variable star, Distant (over 1,000 light-years), On the zodiac, Cool red M-type star, Supergiant, Deep red star, Intrinsically luminous (Mv < −2) and Strongly 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.