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Uncommon nebula 22 EP

NGC 2018

RA 82.8537° · Dec -71.0691° · openngc

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Score breakdown

· 2 badges
22 pts · Uncommon
Uncommon 34 pts → Rare
  • Star-forming region +14
  • Nebula +8
Total score 22

12 more points to reach Rare.

Badges

  • Nebula · +8
  • Star-forming region · +14

Trivia

What it actually is

  • What it actually is. An H II region: a cloud of hydrogen being ionised by the ultraviolet flood from hot young stars inside it. Every one is a star factory caught mid-production.

Find it in the sky

  • How to spot it. At magnitude 10.9 you'll want a small backyard telescope, over in Mensa.
  • 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 December — that's when to go looking.

Its true colour

  • Its true colour. That signature crimson is hydrogen-alpha at 656 nanometres — electrons falling back onto protons, one photon at a time.

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
Men
dso type
HII
mag
10.89
name
NGC 2018
size arcmin
2.8

About NGC 2018

NGC 2018 is an uncommon nebula. It sits in the constellation Men and shines at apparent magnitude 10.89.

An H II region: a cloud of hydrogen being ionised by the ultraviolet flood from hot young stars inside it. Every one is a star factory caught mid-production.

How to see it

Look for NGC 2018 in the constellation Men. At apparent magnitude 10.89, a small backyard telescope will bring it into view.

Like any astronomical target, NGC 2018 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 2018 is an uncommon nebula

NGC 2018 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.

That score comes from 2 science badges — Nebula and Star-forming region — 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.