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Rare variable star 38 EP

HD 160529

RA 265.4959° · Dec -33.5038° · star

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Score breakdown

· 6 badges
38 pts · Rare
Rare 50 pts → Epic
  • Supergiant +18
  • Variable star +5
  • White A-type star +5
  • Gently variable +4
  • On the zodiac +3
  • A named variable star +3
Total score 38

12 more points to reach Epic.

Badges

  • Variable star · +5
  • On the zodiac · +3
  • White A-type star · +5
  • Supergiant · +18
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads A9Ia — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • Where it is in life. It is a luminous supergiant — among the largest and rarest stars in the galaxy.
  • 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 6.7 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Scorpius.
  • 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 June — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out orange (B−V 1) — cooler than the Sun, and the kind of star that burns steadily for tens of billions of years.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 4630 K, against the Sun's 5778 K.

Properties

absmag
-13.34
bv
1.047
constellation
Sco
luminosity
18879913.491
mag
6.66
name
HD 160529
spect
A9Ia
var amplitude
0.15
var designation
V905
var max
6.605
var min
6.755

About HD 160529

HD 160529 is a rare variable star. It sits in the constellation Sco, shines at apparent magnitude 6.66 and has spectral type A9Ia.

Its spectrum reads A9Ia — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for HD 160529 in the constellation Sco. At apparent magnitude 6.66, it is an easy target for binoculars.

Like any astronomical target, HD 160529 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 160529 is a rare variable star

HD 160529 scores 38 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, On the zodiac, White A-type star, Supergiant, 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.