Trash star 11 EP

HD 133786

RA 227.1661° · Dec -55.7949° · star

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Score breakdown

· 3 badges

11 pts · Trash

Trash 15 pts → Common

Hot blue B-type star +6
Star +3
Main-sequence star +2

Total score 11

4 more points to reach Common.

Badges

Star · +3
Hot blue B-type star · +6
Main-sequence star · +2

Trivia

Hard to believe

True brightness. It pours out about 3.7 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 B8Vn... — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.
Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

Find it in the sky

How to spot it. At magnitude 8.4 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Circinus.
Southern sky. It rides the southern half of the sky — an easier target the further south you are.
Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Its true colour

Its true colour. Measured through blue and visual filters it comes out brilliant white (B−V 0) — hotter and whiter than the Sun, the colour of Sirius or Vega.
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: -11.58
bv: 0
constellation: Cir
luminosity: 3732501.578
mag: 8.42
name: HD 133786
spect: B8Vn...

Nearby objects

About HD 133786

HD 133786 is a trash star. It sits in the constellation Cir, shines at apparent magnitude 8.42 and has spectral type B8Vn....

Its spectrum reads B8Vn... — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.

How to see it

Look for HD 133786 in the constellation Cir. At apparent magnitude 8.42, it is an easy target for binoculars.

Like any astronomical target, HD 133786 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 133786 is a trash star

HD 133786 scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Hot blue B-type star and Main-sequence 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.