Uncommon variable star 32 EP

HIP 91239

RA 279.1650° · Dec -8.1848° · star

Loading sky survey…

🌌 View in 3D star map

Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 5 badges

32 pts · Uncommon

Uncommon 34 pts → Rare

Bright giant +12
Sun-like G-type star +8
Variable star +5
Gently variable +4
A named variable star +3

Total score 32

2 more points to reach Rare.

Badges

Variable star · +5
Sun-like G-type star · +8
Bright giant · +12
Gently variable · +4
A named variable star · +3

Trivia

Hard to believe

True brightness. It pours out about 717.8 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 G0IIvar — a G-type star: the very same spectral class as our own 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 10.2 you'll want a small backyard telescope, over in Scutum.
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 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 1.1) — cooler than the Sun, and the kind of star that burns steadily for tens of billions of years.

Properties

absmag: -9.81
bv: 1.12
constellation: Sct
luminosity: 731139.0835
mag: 10.19
name: HIP 91239
spect: G0IIvar
var amplitude: 0.24
var designation: EV
var max: 10.036
var min: 10.276

Nearby objects

About HIP 91239

HIP 91239 is an uncommon variable star. It sits in the constellation Sct, shines at apparent magnitude 10.19 and has spectral type G0IIvar.

Its spectrum reads G0IIvar — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HIP 91239 in the constellation Sct. At apparent magnitude 10.19, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 91239 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 91239 is an uncommon variable star

HIP 91239 scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Sun-like G-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.