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Uncommon star 32 EP

HD 248587

RA 88.0951° · Dec 19.1497° · star

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Score breakdown

· 4 badges
32 pts · Uncommon
Uncommon 34 pts → Rare
  • Supergiant +18
  • In Orion's hunting ground +6
  • White A-type star +5
  • Star +3
Total score 32

2 more points to reach Rare.

Badges

  • Star · +3
  • In Orion's hunting ground · +6
  • White A-type star · +5
  • Supergiant · +18

Trivia

What it actually is

  • Spectral class. Its spectrum reads A0Iab — 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 supergiant. Drop it where the Sun is and its surface would engulf the inner planets.

Find it in the sky

  • How to spot it. At magnitude 7.9 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Orion.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • 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 yellow (B−V 0.6) — almost exactly the Sun's own shade — a stellar twin in colour, if not in size.
  • 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 5800 K, against the Sun's 5778 K.

Properties

absmag
-12.08
bv
0.643
constellation
Ori
luminosity
5915616.3418
mag
7.92
name
HD 248587
spect
A0Iab

About HD 248587

HD 248587 is an uncommon star. It sits in the constellation Ori, shines at apparent magnitude 7.92 and has spectral type A0Iab.

Its spectrum reads A0Iab — 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 248587 in the constellation Ori. At apparent magnitude 7.92, it is an easy target for binoculars.

Like any astronomical target, HD 248587 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 248587 is an uncommon star

HD 248587 scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, In Orion's hunting ground, White A-type star and Supergiant — 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.