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Uncommon galaxy 33 EP

NGC 7745

RA 356.1908° · Dec 25.9090° · openngc

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Score breakdown

· 4 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Galaxy +14
  • Ghostly low surface brightness +10
  • Outside our galaxy entirely +6
  • Faint fuzzy (mag > 13) +3
Total score 33

1 more point to reach Rare.

Badges

  • Galaxy · +14
  • Outside our galaxy entirely · +6
  • Ghostly low surface brightness · +10
  • Faint fuzzy (mag > 13) · +3

Trivia

What it actually is

  • What it actually is. A galaxy: a gravitationally bound city of stars, gas and dark matter, turning so slowly that a single rotation takes hundreds of millions of years.

Sense of scale

  • In perspective. Deep in the extragalactic distance — further than the entire Virgo Cluster of galaxies.
  • Scale. Home to hundreds of billions of stars — a universe unto itself, and every one of those points of light could have planets.

Find it in the sky

  • How to spot it. At magnitude 16.6 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Pegasus.
  • 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 September — 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. ≈ 14.5 trillion years at Voyager 1's speed (17 km/s).

Properties

constellation
Peg
dist ly
824389635.8452
dso type
G
mag
16.64
name
NGC 7745
radial velocity kms
17172
redshift
0.059
size arcmin
0.68
surface brightness
24.55

About NGC 7745

NGC 7745 is an uncommon galaxy. It lies about 824,389,635.8 light-years from Earth, sits in the constellation Peg and shines at apparent magnitude 16.64.

A galaxy: a gravitationally bound city of stars, gas and dark matter, turning so slowly that a single rotation takes hundreds of millions of years.

How to see it

Look for NGC 7745 in the constellation Peg. At apparent magnitude 16.64, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, NGC 7745 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 NGC 7745 is an uncommon galaxy

NGC 7745 scores 33 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Galaxy, Outside our galaxy entirely, Ghostly low surface brightness and Faint fuzzy (mag > 13) — 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.