Contains: NGC 281, The star ηCas
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NGC 281 the PacMan nebula

Technical card

Resolution: 4093x2729

Dates: Oct. 31, 2011Nov. 2, 2011Nov. 3, 2013Nov. 10, 2014Nov. 11, 2014

AstroDon 5nm Ha: 9x1200" bin 1x1
Astrodon E-series LRGB: 30x240" bin 2x2
Astronomik H-alpha 6nm: 14x600"
Hutech IDAS LPS P2 2": 116x120" ISO800 bin 1x1

Integration: 11.2 hours

Avg. Moon age: 15.91 days

Avg. Moon phase: 48.01%

Bortle Dark-Sky Scale: 6.00 job: 526501

RA center: 13.291 degrees

DEC center: 56.637 degrees

Orientation: 91.322 degrees

Field radius: 1.461 degrees


NGC 281 the Pac Man nebula
Emission nebula in the constellation of Cassiopeia
RGB data captured on October 29 and 31, 2011
H-Alpha data captured on November 1 and November 2, 2011
Ocala, FL
RGB data: Combination of 60 sec, 120 sec and 180 sec. exposure stacked in DSS for a total of 4 hour 7 min with 10 minute
H-Alpha data: 10 minute exposure stacked in DeepSkyStacker for a total of 2 hours and 10 min.
PhotoShop CS5
Orion 80mm EON
Orion 50mm guide scope with SSAG
Canon T1i (modified)
Losmandy G11 with Gemini II
Hutech IDAS Light Pollution Suppression (LPS) Filter
Astronomic 6nm H-Alpha clip filter for Canon EOS

Additional data adding detail to the inner nebula was accomplished using an Astro-Tech 8 inch Ritchey-Chretien telescope (Ha data) and Explore Scientific 127mm CF APO (RGB)
Imaging camera: QSI 683wsg-8
Ha data 3 hours
RGB data 40 min each Red, Green and Blue channel binned 2x2



Steve Coates

Sky plot

Sky plot


NGC 281 the PacMan nebula, Steve Coates