← Back to dex
Common variable star 21 EP

HD 128862

RA 221.0718° · Dec -73.9682° · star

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

Computing the sky for your location…

Score breakdown

· 5 badges
21 pts · Common
Common 22 pts → Uncommon
  • Giant star +6
  • Variable star +5
  • Gently variable +4
  • 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
  • Giant star · +6
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F0III/IV — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • 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 8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Apus.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Could we get there?

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

Properties

absmag
1.146
bv
0.342
constellation
Aps
dist ly
780.2773
luminosity
30.311
mag
8.04
name
HD 128862
spect
F0III/IV
var amplitude
0.08
var designation
PR
var max
7.995
var min
8.075

About HD 128862

HD 128862 is a common variable star. It lies about 780.3 light-years from Earth, sits in the constellation Aps, shines at apparent magnitude 8.04 and has spectral type F0III/IV.

Its spectrum reads F0III/IV — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 128862 in the constellation Aps. At apparent magnitude 8.04, it is an easy target for binoculars.

Like any astronomical target, HD 128862 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 128862 is a common variable star

HD 128862 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 5 science badges — Variable star, Yellow-white F-type star, Giant star, Gently 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.