Hemisphere:  Southern  ·  Constellation: Cetus (Cet)  ·  Contains:  NGC 246  ·  NGC246  ·  PGC2689  ·  PGC2800923  ·  PGC956570  ·  PGC959801  ·  PGC960832  ·  PGC961650  ·  PGC964306  ·  PK118-74.1
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NGC 246 Planetary Nebula, 


            Jerry Macon
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NGC 246 Planetary Nebula

Imaging telescopes or lenses: PlaneWave Instruments CDK14

Imaging cameras: ZWO ASI6200MM-PRO

Mounts: Paramount MEII with Absolute Encoders

Software: Nighttime Imaging ‘N’ Astronomy N.I.N.A.  ·  PixInsight 1.8  ·  StarNet++ .

Filters: Antlia RGB 50mm

Dates:Dec. 15, 2020

Frames:Antlia RGB 50mm: 114x60" (gain: 100.00) -15C bin 2x2

Integration: 1.9 hours

Avg. Moon age: 0.92 days

Avg. Moon phase: 0.95%

Bortle Dark-Sky Scale: 3.00

Astrometry.net job: 4111247

RA center: 0h 47' 3"

DEC center: -11° 52' 17"

Pixel scale: 0.603 arcsec/pixel

Orientation: 90.116 degrees

Field radius: 0.447 degrees

Resolution: 4443x2964

Locations: Dark Star Observatory, Taos, New Mexico, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility


No dithering.
No guiding.
Fixed focus position (focuser inoperative)

This is one of the easiest PNs to image. Just take RGB. It does not need any NB.

NGC 246 (also known as the Skull Nebula or Caldwell 56 is a planetary nebula in the constellation Cetus. The nebula and the stars associated with it are listed in several catalogs, as summarized by the SIMBAD database. It is roughly 1,600 light-years away. The nebula's central star is the 12th magnitude white dwarf HIP 3678.

Among some amateur astronomers, NGC 246 is known as the "Pac-Man Nebula" because of the arrangement of its central stars and the surrounding star field.


Sky plot

Sky plot


NGC 246 Planetary Nebula, 


            Jerry Macon