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Uncommon variable star 25 EP

HD 133119

RA 226.2101° · Dec -53.3600° · star

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Score breakdown

· 5 badges
25 pts · Uncommon
Uncommon 34 pts → Rare
  • Sun-like G-type star +8
  • Variable star +5
  • Subgiant (leaving the main sequence) +5
  • Gently variable +4
  • A named variable star +3
Total score 25

9 more points to reach Rare.

Badges

  • Variable star · +5
  • Sun-like G-type star · +8
  • Subgiant (leaving the main sequence) · +5
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads G0IV/V — a G-type star: the very same spectral class as our own Sun.
  • 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.
  • It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.

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 9.3 you'll want a small backyard telescope, over in Lupus.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Could we get there?

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

Properties

absmag
2.487
bv
0.667
constellation
Lup
dist ly
741.2635
luminosity
8.8145
mag
9.27
name
HD 133119
spect
G0IV/V
var amplitude
0.1
var designation
OR
var max
9.227
var min
9.327

About HD 133119

HD 133119 is an uncommon variable star. It lies about 741.3 light-years from Earth, sits in the constellation Lup, shines at apparent magnitude 9.27 and has spectral type G0IV/V.

Its spectrum reads G0IV/V — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 133119 in the constellation Lup. At apparent magnitude 9.27, a small backyard telescope will bring it into view.

Like any astronomical target, HD 133119 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 133119 is an uncommon variable star

HD 133119 scores 25 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 9 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Sun-like G-type star, Subgiant (leaving the main sequence), Gently variable and A named variable 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.