Uncommon variable star 27 EP

HD 125465

RA 215.4523° · Dec -61.5496° · star

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Score breakdown

· 5 badges

27 pts · Uncommon

Uncommon 34 pts → Rare

Bright giant +12
Variable star +5
Gently variable +4
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
Bright giant · +12
Gently variable · +4
A named variable star · +3

Trivia

Hard to believe

True brightness. It pours out about 2.8 million 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 F7II — an F-type star — a little hotter, whiter and shorter-lived than the 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 8.7 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Centaurus.
Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
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 orange (B−V 1.2) — cooler than the Sun, and the kind of star that burns steadily for tens of billions of years.

Properties

absmag: -11.28
bv: 1.208
constellation: Cen
luminosity: 2831391.9958
mag: 8.72
name: HD 125465
spect: F7II
var amplitude: 0.48
var designation: V339
var max: 8.531
var min: 9.011

Nearby objects

About HD 125465

HD 125465 is an uncommon variable star. It sits in the constellation Cen, shines at apparent magnitude 8.72 and has spectral type F7II.

Its spectrum reads F7II — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 125465 in the constellation Cen. At apparent magnitude 8.72, it is an easy target for binoculars.

Like any astronomical target, HD 125465 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 125465 is an uncommon variable star

HD 125465 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, 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.