Trash star 14 EP

HD 225010

RA 0.6602° · Dec 66.1004° · star

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Score breakdown

· 4 badges

14 pts · Trash

Trash 15 pts → Common

White A-type star +5
Never sets (northern circumpolar) +4
Star +3
Main-sequence star +2

Total score 14

1 more point to reach Common.

Badges

Star · +3
Never sets (northern circumpolar) · +4
White A-type star · +5
Main-sequence star · +2

Trivia

What it actually is

Spectral class. Its spectrum reads A2V — 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 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 7.2 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cassiopeia.
Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
Best time of year. It stands highest in the middle of the night around September — 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 9180 K, against the Sun's 5778 K.

Properties

absmag: -12.8
bv: 0.085
constellation: Cas
luminosity: 11481536.215
mag: 7.2
name: HD 225010
spect: A2V

Nearby objects

About HD 225010

HD 225010 is a trash star. It sits in the constellation Cas, shines at apparent magnitude 7.2 and has spectral type A2V.

Its spectrum reads A2V — 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 225010 in the constellation Cas. At apparent magnitude 7.2, it is an easy target for binoculars.

Like any astronomical target, HD 225010 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 225010 is a trash star

HD 225010 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 4 science badges — Star, Never sets (northern circumpolar), White A-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.