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Uncommon variable star 27 EP

HIP 68908

RA 211.6166° · Dec 37.8282° · star

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Score breakdown

· 5 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Strongly variable +10
  • Giant star +6
  • Variable star +5
  • 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
  • Giant star · +6
  • Strongly variable · +10
  • A named variable star · +3

Trivia

Hard to believe

  • True brightness. It pours out about 457.1 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 F2III — 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.

Find it in the sky

  • How to spot it. At magnitude 10.7 you'll want a small backyard telescope, over in Canes Venatici.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around April — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out yellow-white (B−V 0.4) — a shade brighter and crisper than our own Sun.

Properties

absmag
-9.32
bv
0.352
constellation
CVn
luminosity
465586.0935
mag
10.68
name
HIP 68908
spect
F2III
var amplitude
0.87
var designation
W
var max
10.039
var min
10.909

About HIP 68908

HIP 68908 is an uncommon variable star. It sits in the constellation CVn, shines at apparent magnitude 10.68 and has spectral type F2III.

Its spectrum reads F2III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HIP 68908 in the constellation CVn. At apparent magnitude 10.68, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 68908 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 68908 is an uncommon variable star

HIP 68908 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, Giant 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.