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Uncommon galaxy 30 EP

IC 4831

RA 288.6827° · Dec -62.2726° · openngc

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Score breakdown

· 3 badges
30 pts · Uncommon
Uncommon 34 pts → Rare
  • Galaxy +14
  • Barred spiral galaxy +10
  • Outside our galaxy entirely +6
Total score 30

4 more points to reach Rare.

Badges

  • Galaxy · +14
  • Outside our galaxy entirely · +6
  • Barred spiral galaxy · +10

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 12.1 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Pavo.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Could we get there?

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

Properties

constellation
Pav
dist ly
204190716.3371
dso type
G
hubble
SBab
mag
12.08
name
IC 4831
radial velocity kms
4350
redshift
0.0146
size arcmin
3.67
surface brightness
23.52

About IC 4831

IC 4831 is an uncommon galaxy. It lies about 204,190,716.3 light-years from Earth, sits in the constellation Pav and shines at apparent magnitude 12.08.

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 4831 in the constellation Pav. At apparent magnitude 12.08, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, IC 4831 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 4831 is an uncommon galaxy

IC 4831 scores 30 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.

That score comes from 3 science badges — Galaxy, Outside our galaxy entirely and Barred spiral galaxy — 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.