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Common variable star 21 EP

HIP 55031

RA 168.9851° · Dec -48.6908° · star

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Score breakdown

· 4 badges
21 pts · Common
Common 22 pts → Uncommon
  • Strongly variable +10
  • Variable star +5
  • Yellow-white F-type star +3
  • A named variable star +3
Total score 21

1 more point to reach Uncommon.

Badges

  • Variable star · +5
  • Yellow-white F-type star · +3
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads Fp — an F-type star — a little hotter, whiter and shorter-lived 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. 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 12.3 it is far too faint for the eye: this one belongs to cameras and long exposures, 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.

Getting there

  • Aboard Voyager 1. ≈ 1.6 million years at Voyager 1's speed (17 km/s).

Properties

absmag
10.103
constellation
Cen
dist ly
89.702
luminosity
0.0079
mag
12.3
name
HIP 55031
spect
Fp
var amplitude
0.55
var designation
V902
var max
12.085
var min
12.635

About HIP 55031

HIP 55031 is a common variable star. It lies about 89.7 light-years from Earth, sits in the constellation Cen, shines at apparent magnitude 12.3 and has spectral type Fp.

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

How to see it

Look for HIP 55031 in the constellation Cen. At apparent magnitude 12.3, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, HIP 55031 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 HIP 55031 is a common variable star

HIP 55031 scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Variable star, Yellow-white F-type star, 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.