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Rare variable star 34 EP

Rana

RA 55.8121° · Dec -9.7634° · star

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Score breakdown

· 7 badges
34 pts · Rare
Rare 50 pts → Epic
  • Naked-eye visible +8
  • Has a proper name +8
  • Variable star +5
  • Subgiant (leaving the main sequence) +5
  • Orange K-type star +3
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 34

16 more points to reach Epic.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • Has a proper name · +8
  • Orange K-type star · +3
  • Subgiant (leaving the main sequence) · +5
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads K0IV — 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 subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.
  • 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. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 3.5 you can see it with your own eyes from a dark site, over in Eridanus.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around November — that's when to go looking.

Could we get there?

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

Properties

absmag
3.739
bv
0.915
constellation
Eri
dist ly
29.4871
luminosity
2.7823
mag
3.52
name
Rana
named
yes
spect
K0IV
var amplitude
0.02
var designation
Del
var max
3.511
var min
3.531

About Rana

Rana is a rare variable star. It lies about 29.5 light-years from Earth, sits in the constellation Eri, shines at apparent magnitude 3.52 and has spectral type K0IV.

Its spectrum reads K0IV — 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 Rana in the constellation Eri. At apparent magnitude 3.52, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Rana 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 Rana is a rare variable star

Rana scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 16 points would lift it into a rarer tier.

That score comes from 7 science badges — Variable star, Naked-eye visible, Has a proper name, Orange K-type star, Subgiant (leaving the main sequence), 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.