NGC 2903, UHC-S, 23 Feb 2015 (David Dearden)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: NGC 2903 · NGC 2905

NGC 2903, UHC-S, 23 Feb 2015

Some light wind pushing things around, and guiding performance was poor. Synched on Regulus, then did a PicGoto find to NGC 2903, which was easily visible with 2-sec exposures. Imaged to the meridian, performed a flip, plate solved with Astrotortilla, and reacquired with PicGoto. Continued until the object set.

Date: 23 Feb 2015

Subject: NGC 2903, barred spiral galaxy in Leo

Scope: Astrotech AT8IN+High Point Scientific Coma Corrector

Filter: Baader UHC-S

Mount: CG-5 (Synta motors, PicGoto Simplificado)

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.4.1 (Win 7 ASCOM)

Camera: DSI IIc no cooling (about 0 °C)

Acquisition: Nebulosity 3.3.2, no dither

Exposure: 38x600 s

Stacking: Neb 3.3.2, bad pixel map, bias included, 33 flats, histogram match, deBayer & square, trans+rot align, 1.5 σ combine.

Processing: StarTools 1.3.5.289 Crop; Wipe; Autodev with ROI; HDR

ptimize; Color: Scientific, 200%; Deconvolute 2.6 pix; Life:Moderate; Track 4.7 pix; Magic:Shrink 2 pix. Photoshop CC 2014 + Carboni Astronomy Tools Increase star color; Deep space noise reduction; Space noise reduction with layer mask to retain detail in galaxy; Astroframe.

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Status	Advanced success
Started	...
Astrometry.net job	556522
PixInsight job	40BDBSZ8Z8LLIFK90PFKTTS2RIY5R7S6
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h32m03s.11
RA (top/left)	09h33m05s.55
RA (top/right)	09h33m13s.87
RA (bottom/right)	09h31m01s.21
RA (bottom/left)	09h30m52s.53

Dec (center)	+21°29′42″.4
Dec (top/left)	+21°09′32″.6
Dec (top/right)	+21°48′06″.3
Dec (bottom/right)	+21°49′49″.7
Dec (bottom/left)	+21°11′01″.9

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NGC 2903, UHC-S, 23 Feb 2015

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