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Rare variable star 43 EP

HD 140145

RA 235.8900° · Dec -37.1695° · star

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Score breakdown

· 7 badges
43 pts · Rare
Rare 50 pts → Epic
  • Bright giant +12
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Cool red M-type star +5
  • Gently variable +4
  • A named variable star +3
Total score 43

7 more points to reach Epic.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • Cool red M-type star · +5
  • Bright giant · +12
  • Deep red star · +8
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads M5/M6II: — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
  • 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 8.5 it is just past naked-eye reach — ordinary binoculars will pull it in, 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. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 32 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-0.196
bv
1.462
constellation
Lup
dist ly
1822.1005
luminosity
104.3278
mag
8.54
name
HD 140145
spect
M5/M6II:
var amplitude
0.44
var designation
FQ
var max
8.323
var min
8.763

About HD 140145

HD 140145 is a rare variable star. It lies about 1,822.1 light-years from Earth, sits in the constellation Lup, shines at apparent magnitude 8.54 and has spectral type M5/M6II:.

Its spectrum reads M5/M6II: — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

How to see it

Look for HD 140145 in the constellation Lup. At apparent magnitude 8.54, it is an easy target for binoculars.

Like any astronomical target, HD 140145 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 140145 is a rare variable star

HD 140145 scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.

That score comes from 7 science badges — Variable star, Distant (over 1,000 light-years), Cool red M-type star, Bright giant, Deep red star, 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.