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Uncommon nebula 28 EP

NGC 3247

RA 156.0583° · Dec -57.7633° · openngc

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Score breakdown

· 3 badges
28 pts · Uncommon
Uncommon 34 pts → Rare
  • Star-forming region +14
  • Nebula +8
  • Bright deep-sky object +6
Total score 28

6 more points to reach Rare.

Badges

  • Nebula · +8
  • Bright deep-sky object · +6
  • 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 7.6 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Carina.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around February — 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
Car
dso type
HII
mag
7.6
name
NGC 3247
size arcmin
5

About NGC 3247

NGC 3247 is an uncommon nebula. It sits in the constellation Car and shines at apparent magnitude 7.6.

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 3247 in the constellation Car. At apparent magnitude 7.6, it is an easy target for binoculars.

Like any astronomical target, NGC 3247 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 3247 is an uncommon nebula

NGC 3247 scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.

That score comes from 3 science badges — Nebula, Bright deep-sky object 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.