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Common star 18 EP

HD 120112

RA 207.3094° · Dec -62.1033° · star

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Score breakdown

· 3 badges
18 pts · Common
Common 22 pts → Uncommon
  • Bright giant +12
  • Star +3
  • Orange K-type star +3
Total score 18

4 more points to reach Uncommon.

Badges

  • Star · +3
  • Orange K-type star · +3
  • Bright giant · +12

Trivia

What it actually is

  • Spectral class. Its spectrum reads K2/K3II/III — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

Find it in the sky

  • How to spot it. At magnitude 7.5 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 April — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out orange (B−V 1.2) — cooler than the Sun, and the kind of star that burns steadily for tens of billions of years.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 4220 K, against the Sun's 5778 K.

What's in a name

  • Its catalogue. The HD number is from the Henry Draper Catalogue, in which Annie Jump Cannon personally classified the spectra of nearly 400,000 stars — still the largest such feat by one person.

Properties

absmag
-12.45
bv
1.244
constellation
Cen
luminosity
8317637.711
mag
7.55
name
HD 120112
spect
K2/K3II/III

Nearby objects

About HD 120112

HD 120112 is a common star. It sits in the constellation Cen, shines at apparent magnitude 7.55 and has spectral type K2/K3II/III.

Its spectrum reads K2/K3II/III — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

How to see it

Look for HD 120112 in the constellation Cen. At apparent magnitude 7.55, it is an easy target for binoculars.

Like any astronomical target, HD 120112 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 120112 is a common star

HD 120112 scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Orange K-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.