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Common variable star 15 EP

HIP 75720

RA 232.0411° · Dec 38.3606° · star

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Score breakdown

· 4 badges
15 pts · Common
Common 22 pts → Uncommon
  • Variable star +5
  • Gently variable +4
  • Orange K-type star +3
  • A named variable star +3
Total score 15

7 more points to reach Uncommon.

Badges

  • Variable star · +5
  • Orange K-type star · +3
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads K0... — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
  • 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 Boötes.
  • Northern sky. It rides the northern half of the sky — an easier target the further north 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.

Getting there

  • Aboard Voyager 1. ≈ 6.3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
4.095
bv
0.74
constellation
Boo
dist ly
356.8447
luminosity
2.0045
mag
9.29
name
HIP 75720
spect
K0...
var amplitude
0.15
var designation
FL
var max
9.252
var min
9.402

About HIP 75720

HIP 75720 is a common variable star. It lies about 356.8 light-years from Earth, sits in the constellation Boo, shines at apparent magnitude 9.29 and has spectral type K0....

Its spectrum reads K0... — 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 HIP 75720 in the constellation Boo. At apparent magnitude 9.29, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 75720 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 HIP 75720 is a common variable star

HIP 75720 scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.

That score comes from 4 science badges — Variable star, Orange K-type 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.