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Common variable star 19 EP

HR 2392

RA 98.1953° · Dec -11.1664° · star

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Score breakdown

· 5 badges
19 pts · Common
Common 22 pts → Uncommon
  • Giant star +6
  • Variable star +5
  • Orange K-type star +3
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 19

3 more points to reach Uncommon.

Badges

  • Variable star · +5
  • Orange K-type star · +3
  • Giant star · +6
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads K0III:... — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
  • Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.
  • 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 6.3 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Canis Major.
  • 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 December — that's when to go looking.

Could we get there?

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

Properties

absmag
0.845
bv
1.096
constellation
CMa
dist ly
402.1654
luminosity
39.9945
mag
6.3
name
HR 2392
spect
K0III:...
var amplitude
0.03
var designation
HR
var max
6.29
var min
6.32

About HR 2392

HR 2392 is a common variable star. It lies about 402.2 light-years from Earth, sits in the constellation CMa, shines at apparent magnitude 6.3 and has spectral type K0III:....

Its spectrum reads K0III:... — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

How to see it

Look for HR 2392 in the constellation CMa. At apparent magnitude 6.3, it is an easy target for binoculars.

Like any astronomical target, HR 2392 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 2392 is a common variable star

HR 2392 scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Orange K-type star, Giant star, Barely variable (under 0.05 mag) 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.