Lots of Mars images clogging up my newsfeed so one image “to rule them all…” to be updated through the apparition.
Dec 01 – Think this is the end of my Mars season. To small to capture much detail now. It’s been a good one!
Just going to keep updating this throughout the apparition rather than keep putting new images up. Also marked out a few of the more interesting and well known features. I was delighted when I managed to find Olympus Mons although it seems to be brighter this year than in previous apparitions.
Seeing variations make a big difference to detail that can be seen as does my ability to process them. Seeing was much worse later on in the season as Mars receded and got smaller.
General details 250mm f4.8 Newtonian, MPCC ZWO ASI290MC, IR block 180s SER files, 3 – 50% stacked depending on conditions 100-160 fps Captured in FireCapture Processed in AutoStakkert 3, Registax, Photoshop
Bringing out the all the dusty, dark material leaves me with a horrible background.
Iris Nebula NGC 7023 / C4
2020-09-19 Mag. 6.8
250mm f4.8 Newtonian, MPCC
QHY168C @15°C 2/20 gain/offset IDAS P2
28x180s 10/50 darks, flats, bias
The Iris Nebula is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487. The nebula, which shines at magnitude +6.8, is illuminated by a magnitude +7.4 star designated SAO 19158. Wikipedia
Another quick cloud gap but very strong winds and some of the worst seeing. Still managing to get something out of it. Must be getting better. Showing some form of cloud where marked by an arrow, possibly the local dust storm. Sent to the BAA and got this back from the Mars Director, so maybe: “Yes, you caught it. Well done, not many in the uk did. Nuttall, myself and you so far.”
New camera testing. Different way of working with Gain and Offset needing to be chosen and probably using more shorter exposures than the CCD. 32Mb lights instead of 10Mb for the CCD means much longer processing in APP. Couldn’t use the flats as I moved the camera between flats and lights.
NGC6992 Eastern Veil Nebula
Mag. 7, Size 3°
250mm f4.8 OO Newtonian MPCC
QHY168c @-15°C Gain/Offset: 10/50 (unity) No filters
Imaged areas around this a lot for HOYs but never this actual part. First time back using the MPCC without the LP filter this time to avoid internal reflections. Stars are better at 3 corners but top right still off – probably focuser alignment.
Wrong telescope for a comet of this size (8 degree – only 0.5 degree FOV) but came out quite well. Surprising colour combinations – green coma expected, red tail not. Cloned out the trailed RGB stars in PS.
Decided to try 240s exposures in each of RGB this time instead of my usual 180s (chosen to balance detail and LP) and it seems to have worked well, especially since there only 5 subs of each colour. Much deeper into the fainter stars too.
Added twice as many frames as normal – still noisy. Probably need longer exposures. Bad gradients needed a lot of work in APP. UPDATE: Used the demo versions of TOPAZ DeNoiseAI and it makes a huge difference. Removes noise without removing details. Other de-noising seems to just blur features – this is far more intelligent.