About NGC 1788
NGC 1788 is an uncommon nebula. It sits in the constellation Ori and shines at apparent magnitude 5.8.
A reflection nebula. It produces no light at all; it is dust catching the glare of a nearby star and scattering it back at us.
Uncommon nebula 30 EP
NGC 1788
RA 76.7217° · Dec -3.3410° · openngc
Score breakdown
· 4 badgesUncommon 34 pts → Rare
- Reflection nebula +10
- Nebula +8
- Bright deep-sky object +6
- In Orion's hunting ground +6
Total score 30
4 more points to reach Rare.
Badges
- Nebula · +8
- Bright deep-sky object · +6
- Reflection nebula · +10
- In Orion's hunting ground · +6
Trivia
What it actually is
- What it actually is. A reflection nebula. It produces no light at all; it is dust catching the glare of a nearby star and scattering it back at us.
Find it in the sky
- How to spot it. At magnitude 5.8 you can see it with your own eyes from a dark site, over in Orion.
- 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 December — that's when to go looking.
Its true colour
- Its true colour. It looks blue for exactly the reason Earth's sky is blue: fine dust scatters short blue wavelengths far more efficiently than long red ones.
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
- Ori
- dso type
- RfN
- mag
- 5.8
- name
- NGC 1788
- size arcmin
- 2
How to see it
Look for NGC 1788 in the constellation Ori. At apparent magnitude 5.8, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, NGC 1788 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 1788 is an uncommon nebula
NGC 1788 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 4 science badges — Nebula, Bright deep-sky object, Reflection nebula and In Orion's hunting ground — 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.