IC 1396, Elephant Trunk Nebula, OSC UHC-S, 16 Jul 2015 (David Dearden)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: VdB142

IC 1396, Elephant Trunk Nebula, OSC UHC-S, 16 Jul 2015

Could not get the PicGoto/CdC combination to slew to this target; each time I tried, after starting the slew the pointing indictor in CdC would jump down about 4 h from where I had synched it. The same thing happened even when moving the mount manually. Eventually I moved the mount manually from α Ceph and did repeated Astrotortilla plate solves until I got the asterisms I was looking for in my field of view. So this was sort of electronic star hopping! Really a weird bug. Guiding was intermittently quite poor and the warm camera was producing a lot of noise.

Date: 16 Jul 2015

Subject: IC 1396, Elephant Trunk Nebula

Scope: AT8IN + Antares 0.5x Telereducer

Filter: Baader Planetarium UHC-S

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

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.5.0.1 (Win 7 ASCOM)

Camera: DSI IIc, no chiller CCD 24-26 °C

Acquisition: Nebulosity 4.0.2, no dither

Exposure: 32x600 s

Stacking: Neb 4, bad pixel map, bias included, normalize first, trans+rot align, 40-60%tile combine.

Processing: StarTools 1.3.5.289 Crop; Wipe:Color & brightness 77%; Develop 80.11%; HDR Optimize soft; Color:Scientific, 225% sat.; Deconvolute 2.9 pix; Life:Moderate; Track 4.5 pix, Smoothness 88%; Magic:Shrink 1 pix. CS6 Astronomy Tools Increase star color; Make stars smaller; Layer masked local contrast enhance just around sharp features in nebula; Astro Frame.

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Status	Advanced success
Started	...
Astrometry.net job	693074
PixInsight job	9H398J0NSP8XJBSM5YNALZPP5EL38GO9
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h35m34s.64
RA (top/left)	21h38m23s.64
RA (top/right)	21h32m53s.47
RA (bottom/right)	21h32m48s.46
RA (bottom/left)	21h38m13s.94

Dec (center)	+57°26′36″.6
Dec (top/left)	+57°43′32″.5
Dec (top/right)	+57°44′46″.2
Dec (bottom/right)	+57°09′27″.5
Dec (bottom/left)	+57°08′50″.3

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IC 1396, Elephant Trunk Nebula, OSC UHC-S, 16 Jul 2015

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IC 1396, Elephant Trunk Nebula, OSC UHC-S, 16 Jul 2015

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