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Common variable star 20 EP

GL GJ 1257

RA 310.4259° · Dec -22.3224° · star

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Score breakdown

· 6 badges
20 pts · Common
Common 22 pts → Uncommon
  • Variable star +5
  • Gently variable +4
  • On the zodiac +3
  • Orange K-type star +3
  • A named variable star +3
  • Main-sequence star +2
Total score 20

2 more points to reach Uncommon.

Badges

  • Variable star · +5
  • On the zodiac · +3
  • Orange K-type star · +3
  • Main-sequence star · +2
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads K5V — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.
  • 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. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 9.8 you'll want a small backyard telescope, over in Capricornus.
  • 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 July — that's when to go looking.

Could we get there?

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

Properties

absmag
7.945
bv
1.121
constellation
Cap
dist ly
77.7116
luminosity
0.0578
mag
9.83
name
GL GJ 1257
spect
K5V
var amplitude
0.12
var designation
DG
var max
9.761
var min
9.881

About GL GJ 1257

GL GJ 1257 is a common variable star. It lies about 77.7 light-years from Earth, sits in the constellation Cap, shines at apparent magnitude 9.83 and has spectral type K5V.

Its spectrum reads K5V — 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 GL GJ 1257 in the constellation Cap. At apparent magnitude 9.83, a small backyard telescope will bring it into view.

Like any astronomical target, GL GJ 1257 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 GL GJ 1257 is a common variable star

GL GJ 1257 scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 2 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, On the zodiac, Orange K-type star, Main-sequence 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.