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Uncommon star 22 EP

HR 1748

RA 79.8970° · Dec -1.4119° · star

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Score breakdown

· 5 badges
22 pts · Uncommon
Uncommon 34 pts → Rare
  • In Orion's hunting ground +6
  • Hot blue B-type star +6
  • Blue-white star +5
  • Star +3
  • Main-sequence star +2
Total score 22

12 more points to reach Rare.

Badges

  • Star · +3
  • In Orion's hunting ground · +6
  • Hot blue B-type star · +6
  • Main-sequence star · +2
  • Blue-white star · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads B1.5Vn — 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 on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

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 6.3 it is just past naked-eye reach — ordinary binoculars will pull it in, 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.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 12.6 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-0.375
bv
-0.105
constellation
Ori
dist ly
715.2542
luminosity
123.0269
mag
6.33
name
HR 1748
spect
B1.5Vn

About HR 1748

HR 1748 is an uncommon star. It lies about 715.3 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 6.33 and has spectral type B1.5Vn.

Its spectrum reads B1.5Vn — 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 1748 in the constellation Ori. At apparent magnitude 6.33, it is an easy target for binoculars.

Like any astronomical target, HR 1748 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 1748 is an uncommon star

HR 1748 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, In Orion's hunting ground, Hot blue B-type star, Main-sequence 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.