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Uncommon variable star 27 EP

HIP 45570

RA 139.3197° · Dec -53.0849° · star

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Score breakdown

· 5 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Bright giant +12
  • Variable star +5
  • Gently variable +4
  • Yellow-white F-type star +3
  • A named variable star +3
Total score 27

7 more points to reach Rare.

Badges

  • Variable star · +5
  • Yellow-white F-type star · +3
  • Bright giant · +12
  • Gently variable · +4
  • A named variable star · +3

Trivia

Hard to believe

  • True brightness. It pours out about 448.7 thousand times as much light as the Sun. It only looks ordinary because it is so far away.

What it actually is

  • Spectral class. Its spectrum reads F8II — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • 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.

Find it in the sky

  • How to spot it. At magnitude 10.7 you'll want a small backyard telescope, over in Vela.
  • 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 February — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out yellow (B−V 0.7) — almost exactly the Sun's own shade — a stellar twin in colour, if not in size.

Properties

absmag
-9.3
bv
0.727
constellation
Vel
luminosity
457088.1896
mag
10.7
name
HIP 45570
spect
F8II
var amplitude
0.42
var designation
DK
var max
10.494
var min
10.914

About HIP 45570

HIP 45570 is an uncommon variable star. It sits in the constellation Vel, shines at apparent magnitude 10.7 and has spectral type F8II.

Its spectrum reads F8II — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HIP 45570 in the constellation Vel. At apparent magnitude 10.7, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 45570 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 45570 is an uncommon variable star

HIP 45570 scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Yellow-white F-type star, Bright giant, 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.