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Uncommon galaxy 29 EP

NGC 4163

RA 183.0382° · Dec 36.1692° · openngc

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Score breakdown

· 3 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Galaxy +14
  • Irregular galaxy (no shape at all) +12
  • Faint fuzzy (mag > 13) +3
Total score 29

5 more points to reach Rare.

Badges

  • Galaxy · +14
  • Irregular galaxy (no shape at all) · +12
  • 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.
  • Irregular. An irregular galaxy — no disc, no bulge, no symmetry. Most have been pulled out of shape by a larger neighbour's gravity.

Sense of scale

  • 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 13.2 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Canes Venatici.
  • 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 March — that's when to go looking.

Its true colour

  • Its true colour. Its colour is a census: blue where gas is still collapsing into hot young stars, yellow-red in the old, settled core.

How we came to know it

  • The New General Catalogue. Its NGC number comes from J. L. E. Dreyer's 1888 catalogue, itself built on decades of sky sweeps by William Herschel and his sister Caroline.

Properties

constellation
CVn
dso type
G
hubble
I
mag
13.15
name
NGC 4163
radial velocity kms
165
redshift
0.0006
size arcmin
1.67
surface brightness
23.2

Nearby objects

About NGC 4163

NGC 4163 is an uncommon galaxy. It sits in the constellation CVn and shines at apparent magnitude 13.15.

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 4163 in the constellation CVn. At apparent magnitude 13.15, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, NGC 4163 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 4163 is an uncommon galaxy

NGC 4163 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 3 science badges — Galaxy, Irregular galaxy (no shape at all) 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.