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Common galaxy 17 EP

IC 186B

RA 30.1060° · Dec -1.5498° · openngc

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Score breakdown

· 2 badges
17 pts · Common
Common 22 pts → Uncommon
  • Galaxy +14
  • Faint fuzzy (mag > 13) +3
Total score 17

5 more points to reach Uncommon.

Badges

  • Galaxy · +14
  • 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

  • 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 15.8 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Cetus.
  • 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.

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 Index Catalogue. The IC was the 1895 and 1908 supplement to the NGC — the first catalogue in history to be filled largely with objects found on photographic plates rather than by eye.

Properties

constellation
Cet
dso type
G
mag
15.8
name
IC 186B
size arcmin
0.69
surface brightness
23.74

Nearby objects

About IC 186B

IC 186B is a common galaxy. It sits in the constellation Cet and shines at apparent magnitude 15.8.

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 IC 186B in the constellation Cet. At apparent magnitude 15.8, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, IC 186B 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 IC 186B is a common galaxy

IC 186B scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.

That score comes from 2 science badges — Galaxy 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.