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Uncommon star 29 EP

HD 100137

RA 172.6924° · Dec -61.0784° · star

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Score breakdown

· 4 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Bright giant +12
  • Sun-like G-type star +8
  • Distant (over 1,000 light-years) +6
  • Star +3
Total score 29

5 more points to reach Rare.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Sun-like G-type star · +8
  • Bright giant · +12

Trivia

What it actually is

  • Spectral class. Its spectrum reads G8II — a G-type star: the very same spectral class as our own Sun.
  • Where it is in life. It is a bright giant, well on its way to the largest stars there are.

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 8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Centaurus.
  • 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 March — 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. ≈ 54.1 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-1.923
bv
1.12
constellation
Cen
dist ly
3076.9433
luminosity
511.9175
mag
7.95
name
HD 100137
spect
G8II

About HD 100137

HD 100137 is an uncommon star. It lies about 3,076.9 light-years from Earth, sits in the constellation Cen, shines at apparent magnitude 7.95 and has spectral type G8II.

Its spectrum reads G8II — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 100137 in the constellation Cen. At apparent magnitude 7.95, it is an easy target for binoculars.

Like any astronomical target, HD 100137 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 100137 is an uncommon star

HD 100137 scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Distant (over 1,000 light-years), Sun-like G-type star and Bright giant — 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.