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Rare star 39 EP

Elnath

RA 81.5730° · Dec 28.6075° · star

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Score breakdown

· 7 badges
39 pts · Rare
Rare 50 pts → Epic
  • Naked-eye visible +8
  • Has a proper name +8
  • Hot blue B-type star +6
  • Giant star +6
  • Blue-white star +5
  • Star +3
  • On the zodiac +3
Total score 39

11 more points to reach Epic.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • Has a proper name · +8
  • On the zodiac · +3
  • Hot blue B-type star · +6
  • Giant star · +6
  • Blue-white star · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads B7III — 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 giant. It has already exhausted its core hydrogen and swollen up enormously in response.

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 1.6 you can see it with your own eyes from a dark site, over in Taurus.
  • 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.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 2.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-1.417
bv
-0.13
constellation
Tau
dist ly
133.89
luminosity
321.2181
mag
1.65
name
Elnath
named
yes
spect
B7III

About Elnath

Elnath is a rare star. It lies about 133.9 light-years from Earth, sits in the constellation Tau, shines at apparent magnitude 1.65 and has spectral type B7III.

Its spectrum reads B7III — 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 Elnath in the constellation Tau. At apparent magnitude 1.65, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Elnath 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 Elnath is a rare star

Elnath scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.

That score comes from 7 science badges — Star, Naked-eye visible, Has a proper name, On the zodiac, Hot blue B-type star, Giant star and Blue-white 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.