← Back to dex
Uncommon galaxy 33 EP

IC 864

RA 199.2854° · Dec 20.6917° · openngc

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 4 badges
33 pts · Uncommon
Uncommon 34 pts → Rare
  • Galaxy +14
  • Barred spiral galaxy +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
  • Barred spiral galaxy · +10
  • Faint fuzzy (mag > 13) · +3

Trivia

What makes it special

  • Barred spiral. A barred spiral — a straight bar of stars driving right through the nucleus, feeding gas inwards. Our own Milky Way is one of these.

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 17 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Coma Berenices.
  • 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 April — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Properties

constellation
Com
dist ly
555147875.1804
dso type
G
hubble
SBc
mag
16.99
name
IC 864
radial velocity kms
11678
redshift
0.0397
size arcmin
0.58
surface brightness
23.03

About IC 864

IC 864 is an uncommon galaxy. It lies about 555,147,875.2 light-years from Earth, sits in the constellation Com and shines at apparent magnitude 16.99.

A barred spiral — a straight bar of stars driving right through the nucleus, feeding gas inwards. Our own Milky Way is one of these.

How to see it

Look for IC 864 in the constellation Com. At apparent magnitude 16.99, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, IC 864 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 864 is an uncommon galaxy

IC 864 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, Barred spiral 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.