NGC
NGC (standing for New General Catalogue) was a prefix used when assigning numerical designations to stars, stellar clusters, and nebulae. (; )

NGC objects 
 NGC 321
 NGC 2812

Appendices

See also 
 FGC
 SNC
 SNR
 QSR
 UFC

Background information 
Though not mentioned on screen, the following are also known NGC objects:
 NGC 224: Andromeda Galaxy
 NGC 598: Triangulum Galaxy
 NGC 6514: Trifid Nebula
 NGC 6611: Eagle Nebula

External link 
 

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Prefixes