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Uncommon variable star 29 EP

HD 7700

RA 19.2297° · Dec 6.8117° · star

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Score breakdown

· 5 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Strongly variable +10
  • Sun-like G-type star +8
  • Variable star +5
  • On the zodiac +3
  • A named variable star +3
Total score 29

5 more points to reach Rare.

Badges

  • Variable star · +5
  • On the zodiac · +3
  • Sun-like G-type star · +8
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads G2 — 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 9 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Pisces.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • 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. ≈ 3.9 million years at Voyager 1's speed (17 km/s).

Properties

absmag
4.808
bv
0.712
constellation
Psc
dist ly
222.7841
luminosity
1.0394
mag
8.98
name
HD 7700
spect
G2
var amplitude
0.69
var designation
UV
var max
8.916
var min
9.606

About HD 7700

HD 7700 is an uncommon variable star. It lies about 222.8 light-years from Earth, sits in the constellation Psc, shines at apparent magnitude 8.98 and has spectral type G2.

Its spectrum reads G2 — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 7700 in the constellation Psc. At apparent magnitude 8.98, it is an easy target for binoculars.

Like any astronomical target, HD 7700 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 7700 is an uncommon variable star

HD 7700 scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, On the zodiac, Sun-like G-type star, Strongly 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.