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Rare star 41 EP

HD 212545

RA 336.1142° · Dec 35.4331° · star

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Score breakdown

· 5 badges
41 pts · Rare
Rare 50 pts → Epic
  • Supergiant +18
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Hot blue B-type star +6
  • Star +3
Total score 41

9 more points to reach Epic.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Hot blue B-type star · +6
  • Supergiant · +18
  • Deep red star · +8

Trivia

What it actually is

  • Spectral class. Its spectrum reads B5Iab — 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 a supergiant. Drop it where the Sun is and its surface would engulf the inner planets.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 7.3 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Pegasus.
  • 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 August — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 20.3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-0.441
bv
1.57
constellation
Peg
dist ly
1152.4947
luminosity
130.7374
mag
7.3
name
HD 212545
spect
B5Iab

About HD 212545

HD 212545 is a rare star. It lies about 1,152.5 light-years from Earth, sits in the constellation Peg, shines at apparent magnitude 7.3 and has spectral type B5Iab.

Its spectrum reads B5Iab — 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 212545 in the constellation Peg. At apparent magnitude 7.3, it is an easy target for binoculars.

Like any astronomical target, HD 212545 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 212545 is a rare star

HD 212545 scores 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 9 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Distant (over 1,000 light-years), Hot blue B-type star, Supergiant and Deep red 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.