Uncommon star 30 EP

HD 111283

RA 192.2604° · Dec -65.5932° · star

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Score breakdown

· 5 badges

30 pts · Uncommon

Uncommon 34 pts → Rare

Intrinsically luminous (Mv < −2) +10
Distant (over 1,000 light-years) +6
Hot blue B-type star +6
Subgiant (leaving the main sequence) +5
Star +3

Total score 30

4 more points to reach Rare.

Badges

Star · +3
Distant (over 1,000 light-years) · +6
Hot blue B-type star · +6
Subgiant (leaving the main sequence) · +5
Intrinsically luminous (Mv < −2) · +10

Trivia

What it actually is

Spectral class. Its spectrum reads B6IV — 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 subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.

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 7.2 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Musca.
Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
Best time of year. It stands highest in the middle of the night around April — 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. ≈ 52.1 million years at Voyager 1's speed (17 km/s).

Properties

absmag: -2.573
bv: 0.005
constellation: Mus
dist ly: 2965.0545
luminosity: 931.5368
mag: 7.22
name: HD 111283
spect: B6IV

Nearby objects

About HD 111283

HD 111283 is an uncommon star. It lies about 2,965.1 light-years from Earth, sits in the constellation Mus, shines at apparent magnitude 7.22 and has spectral type B6IV.

Its spectrum reads B6IV — 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 111283 in the constellation Mus. At apparent magnitude 7.22, it is an easy target for binoculars.

Like any astronomical target, HD 111283 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 111283 is an uncommon star

HD 111283 scores 30 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 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, Subgiant (leaving the main sequence) 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.