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Rare variable star 45 EP

HD 56450

RA 109.1568° · Dec -11.4873° · star

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Score breakdown

· 6 badges
45 pts · Rare
Rare 50 pts → Epic
  • Supergiant +18
  • Strongly variable +10
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Yellow-white F-type star +3
  • A named variable star +3
Total score 45

5 more points to reach Epic.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • Yellow-white F-type star · +3
  • Supergiant · +18
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F7.5Ib — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a supergiant, hundreds of times wider than the Sun.
  • 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 8.2 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 January — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Properties

absmag
-0.683
bv
0.8
constellation
CMa
dist ly
1941.4048
luminosity
163.3804
mag
8.19
name
HD 56450
spect
F7.5Ib
var amplitude
0.73
var designation
RY
var max
7.669
var min
8.399

About HD 56450

HD 56450 is a rare variable star. It lies about 1,941.4 light-years from Earth, sits in the constellation CMa, shines at apparent magnitude 8.19 and has spectral type F7.5Ib.

Its spectrum reads F7.5Ib — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 56450 in the constellation CMa. At apparent magnitude 8.19, it is an easy target for binoculars.

Like any astronomical target, HD 56450 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 HD 56450 is a rare variable star

HD 56450 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 6 science badges — Variable star, Distant (over 1,000 light-years), Yellow-white F-type star, Supergiant, Strongly 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.