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Rare star 46 EP

HR 2111

RA 90.2519° · Dec 27.5724° · star

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Score breakdown

· 6 badges
46 pts · Rare
Rare 50 pts → Epic
  • Supergiant +18
  • Intrinsically luminous (Mv < −2) +10
  • Distant (over 1,000 light-years) +6
  • Hot blue B-type star +6
  • Star +3
  • On the zodiac +3
Total score 46

4 more points to reach Epic.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • On the zodiac · +3
  • Hot blue B-type star · +6
  • Supergiant · +18
  • Intrinsically luminous (Mv < −2) · +10

Trivia

What it actually is

  • Spectral class. Its spectrum reads B9Iab — 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 6 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Gemini.
  • 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. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 40.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-3.199
bv
0.218
constellation
Gem
dist ly
2296.8734
luminosity
1658.0591
mag
6.04
name
HR 2111
spect
B9Iab

About HR 2111

HR 2111 is a rare star. It lies about 2,296.9 light-years from Earth, sits in the constellation Gem, shines at apparent magnitude 6.04 and has spectral type B9Iab.

Its spectrum reads B9Iab — 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 HR 2111 in the constellation Gem. At apparent magnitude 6.04, it is an easy target for binoculars.

Like any astronomical target, HR 2111 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 HR 2111 is a rare star

HR 2111 scores 46 points on Spacedle's rarity scale, which places it in the rare tier. Another 4 points would lift it into a rarer tier.

That score comes from 6 science badges — Star, Distant (over 1,000 light-years), On the zodiac, Hot blue B-type star, Supergiant and Intrinsically luminous (Mv < −2) — 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.