Common variable star 15 EP

HIP 43199

RA 132.0073° · Dec 18.6771° · star

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Score breakdown

· 4 badges

15 pts · Common

Common 22 pts → Uncommon

Variable star +5
Gently variable +4
On the zodiac +3
A named variable star +3

Total score 15

7 more points to reach Uncommon.

Badges

Variable star · +5
On the zodiac · +3
Gently variable · +4
A named variable star · +3

Trivia

Hard to believe

True brightness. It pours out about 570.2 thousand times as much light as the Sun. It only looks ordinary because it is so far away.

What it actually is

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 10.4 you'll want a small backyard telescope, over in Cancer.
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 February — 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 0.6) — 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.

By the numbers

Surface temperature. Its colour puts the surface at roughly 6080 K, against the Sun's 5778 K.

Properties

absmag: -9.56
bv: 0.572
constellation: Cnc
luminosity: 580764.4175
mag: 10.44
name: HIP 43199
var amplitude: 0.18
var designation: FV
var max: 10.317
var min: 10.497

Nearby objects

About HIP 43199

HIP 43199 is a common variable star. It sits in the constellation Cnc and shines at apparent magnitude 10.44.

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.

How to see it

Look for HIP 43199 in the constellation Cnc. At apparent magnitude 10.44, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 43199 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 43199 is a common variable star

HIP 43199 scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.

That score comes from 4 science badges — Variable star, On the zodiac, 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.