← Back to dex
Epic variable star 53 EP

HR 4755

RA 187.4912° · Dec -41.7359° · star

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 7 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Fades out of naked-eye view +16
  • Bright giant +12
  • Deep red star +8
  • Variable star +5
  • Cool red M-type star +5
  • Gently variable +4
  • A named variable star +3
Total score 53

25 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Cool red M-type star · +5
  • Bright giant · +12
  • Deep red star · +8
  • Gently variable · +4
  • Fades out of naked-eye view · +16
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads M2II/III — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
  • Where it is in life. It is a bright giant, well on its way to the largest stars there are.
  • 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 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Centaurus.
  • 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 March — that's when to go looking.

Could we get there?

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

Properties

absmag
-0.773
bv
1.515
constellation
Cen
dist ly
737.9094
luminosity
177.5007
mag
6
name
HR 4755
spect
M2II/III
var amplitude
0.07
var designation
V928
var max
5.965
var min
6.035

About HR 4755

HR 4755 is an epic variable star. It lies about 737.9 light-years from Earth, sits in the constellation Cen, shines at apparent magnitude 6 and has spectral type M2II/III.

Its spectrum reads M2II/III — 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 4755 in the constellation Cen. At apparent magnitude 6, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HR 4755 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 4755 is an epic variable star

HR 4755 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, Cool red M-type star, Bright giant, Deep red star, Gently variable, Fades out of naked-eye view 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.