Trash star 14 EP

HD 102112

RA 176.2400° · Dec -51.5712° · star

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Score breakdown

· 3 badges

14 pts · Trash

Trash 15 pts → Common

Giant star +6
White A-type star +5
Star +3

Total score 14

1 more point to reach Common.

Badges

Star · +3
White A-type star · +5
Giant star · +6

Trivia

What it actually is

Spectral class. Its spectrum reads A1III/IV — 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.
Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.

Find it in the sky

How to spot it. At magnitude 7.6 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Centaurus.
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 March — 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 0.1) — 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.

By the numbers

Surface temperature. Its colour puts the surface at roughly 8760 K, against the Sun's 5778 K.

Properties

absmag: -12.42
bv: 0.129
constellation: Cen
luminosity: 8090958.9918
mag: 7.58
name: HD 102112
spect: A1III/IV

Nearby objects

About HD 102112

HD 102112 is a trash star. It sits in the constellation Cen, shines at apparent magnitude 7.58 and has spectral type A1III/IV.

Its spectrum reads A1III/IV — 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 HD 102112 in the constellation Cen. At apparent magnitude 7.58, it is an easy target for binoculars.

Like any astronomical target, HD 102112 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 102112 is a trash star

HD 102112 scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Star, White A-type star and Giant 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.