IC1396A Elephant's Trunk Nebula in HSO II (Christian Großmann)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD205948 · HD206081 · LBN 451 · LBN 452 · LDN 1093 · LDN 1098 · LDN 1099 · LDN 1105 · VdB142

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IC1396A Elephant's Trunk Nebula in HSO II

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IC1396A Elephant's Trunk Nebula in HSO II

This is my secend attempt of the Elephants Trunk nebula IC1396. I finally managed to buy the SII and OIII Astronomik filters that matches with my Ha filter that is made by this company. The result are 7 filters in my filter wheel (LRGB Ha OIII SII) made of the same brand that are parfocal. They ARE better than the Optolongs I used so far, but the difference is not huge. But I won't get those strange halos around the stars anymore, that came from the different filter curves and bandwiths.

I also have to say "Thank you" to all the users that responded to my question about counterweights and guiding performance. I finally managed to reduce the average guiding error of my 8" f/4 Newton from 0.8 Pixel average to about 0.2 pixel. I added another counterweight and brought the center of mass closer to the mount. There may still be room for improvements, but the quality of the subs is much better now. It is much easier to process the final image.

Getting the subs for this image was a bit of a pain. In the evening, the sky was clear. During the night, fog came along and made imaging impossible. In the end, it took me 4 nights to collect the data for this 9 hour exposure. Sadly, the data of the first night was unusable due to a problem with my mount.

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Status	Advanced success
Started	...
Astrometry.net job	5087387
PixInsight job	AODO9XL8VZ1O3ZKUSKF63WMWV6JBNV5G
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h35m00s.516
RA (top/left)	21h37m37s.462
RA (top/right)	21h38m33s.257
RA (bottom/right)	21h32m20s.307
RA (bottom/left)	21h31m29s.952

Dec (center)	+57°30′35″.31
Dec (top/left)	+57°08′35″.70
Dec (top/right)	+57°41′38″.30
Dec (bottom/right)	+57°52′24″.90
Dec (bottom/left)	+57°19′10″.45

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IC1396A Elephant's Trunk Nebula in HSO II

IC1396A Elephant's Trunk Nebula in HSO II

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IC1396A Elephant's Trunk Nebula in HSO II

IC1396A Elephant's Trunk Nebula in HSO II

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