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Common variable star 21 EP

HD 9313

RA 22.9786° · Dec 16.0470° · star

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Score breakdown

· 5 badges
21 pts · Common
Common 22 pts → Uncommon
  • Sun-like G-type star +8
  • Variable star +5
  • On the zodiac +3
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 21

1 more point to reach Uncommon.

Badges

  • Variable star · +5
  • On the zodiac · +3
  • Sun-like G-type star · +8
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads G5 — a G-type star: the very same spectral class as our own Sun.
  • 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 7.8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Pisces.
  • 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 October — 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
2.598
bv
0.972
constellation
Psc
dist ly
361.1917
luminosity
7.9579
mag
7.82
name
HD 9313
spect
G5
var amplitude
0.04
var designation
BF
var max
7.798
var min
7.838

About HD 9313

HD 9313 is a common variable star. It lies about 361.2 light-years from Earth, sits in the constellation Psc, shines at apparent magnitude 7.82 and has spectral type G5.

Its spectrum reads G5 — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 9313 in the constellation Psc. At apparent magnitude 7.82, it is an easy target for binoculars.

Like any astronomical target, HD 9313 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 9313 is a common variable star

HD 9313 scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, On the zodiac, Sun-like G-type star, Barely variable (under 0.05 mag) 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.