Uncommon variable star 26 EP

HIP 111719

RA 339.4494° · Dec 1.5344° · star

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Score breakdown

· 5 badges

26 pts · Uncommon

Uncommon 34 pts → Rare

Strongly variable +10
Variable star +5
White A-type star +5
On the zodiac +3
A named variable star +3

Total score 26

8 more points to reach Rare.

Badges

Variable star · +5
On the zodiac · +3
White A-type star · +5
Strongly variable · +10
A named variable star · +3

Trivia

Hard to believe

True brightness. It pours out about 343.6 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 A5 — 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.
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 11 you'll want a small backyard telescope, over in Aquarius.
Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
Best time of year. It stands highest in the middle of the night around August — 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 0.3) — a shade brighter and crisper than our own Sun.
Why no green stars. No star ever looks green: a surface hot enough to peak in green also floods out plenty of red and blue, and your eye blends the mixture back to white.

Properties

absmag: -9.01
bv: 0.315
constellation: Aqr
luminosity: 349945.167
mag: 10.99
name: HIP 111719
spect: A5
var amplitude: 0.75
var designation: CY
var max: 10.44
var min: 11.19

Nearby objects

About HIP 111719

HIP 111719 is an uncommon variable star. It sits in the constellation Aqr, shines at apparent magnitude 10.99 and has spectral type A5.

Its spectrum reads A5 — 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 HIP 111719 in the constellation Aqr. At apparent magnitude 10.99, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 111719 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 111719 is an uncommon variable star

HIP 111719 scores 26 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, On the zodiac, White A-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.