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Trash star 14 EP

HD 290132

RA 79.1607° · Dec -0.1399° · star

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Score breakdown

· 3 badges
14 pts · Trash
Trash 15 pts → Common
  • In Orion's hunting ground +6
  • White A-type star +5
  • Star +3
Total score 14

1 more point to reach Common.

Badges

  • Star · +3
  • In Orion's hunting ground · +6
  • White A-type star · +5

Trivia

Hard to believe

  • True brightness. It pours out about 515.2 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 A2 — 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.

Find it in the sky

  • How to spot it. At magnitude 10.6 you'll want a small backyard telescope, over in Orion.
  • 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 December — 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 0.2) — 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 7910 K, against the Sun's 5778 K.

Properties

absmag
-9.45
bv
0.234
constellation
Ori
luminosity
524807.4602
mag
10.55
name
HD 290132
spect
A2

Nearby objects

About HD 290132

HD 290132 is a trash star. It sits in the constellation Ori, shines at apparent magnitude 10.55 and has spectral type A2.

Its spectrum reads A2 — 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 290132 in the constellation Ori. At apparent magnitude 10.55, a small backyard telescope will bring it into view.

Like any astronomical target, HD 290132 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 290132 is a trash star

HD 290132 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, In Orion's hunting ground and White A-type 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.