First of all tonight I have taken darks for 300s that are needed for the earlier data. However I am still suffering from the QHY168c disconnecting from the laptop, this time in TSX. I have upgraded the software yesterday but this has not made a difference, so it must be something to do with the way there USB cable is connecting. I will attempt to troubleshoot when I get home. Right now I have switched to Ezcap again which seems to be ok.
I have setup over by Mark and will see what this location is like behind the pool building. I have found that the WiFi is weak or non existent. Also the staff room is nearby and the light is constantly on so maybe not the best place to image from.
@00:03 NGC 6352 30s -20℃ I took a single exposure of this.
First thing tonight is to complete taking the darks from yesterday, so I need 20 x 120s -20℃, but also the flat darks I forgot for the 0.35ms flats. Then I will move to taking longer images tonight. The challenge with open clusters is that you need short exposures so you don’t oversaturate the stars.
@22:50 Omega Centauri 30s -20℃
Omega Centauri
@23:20 Centaurus A 300s -20℃
Centaurus A
@00:09 Makemake 120s -20℃ x 10
@00:29 Haumea 120s -20℃ x 10
@01:07 M8 Lagoon 300s -20℃ x 24 (focus drifted so review later images)
Finally got our bags today from the airport. Having arrives on the 2:05pm flight and not hearing from BA by 4pm, Lawrence and I headed off down the mountain in search of the 4 missing bags. It took just over an hour to arrive back in the Cicar car park.
Once there we headed inside to be told the the Iberia desk, which deals with lost and late baggage was only accessible the arrivals hall and so we were told to go through the exit doors and not to worry about the police. So we nervously😱 walked through and were greated with the sight of all the lost bags!
Blurry Bags
It took some 20 mins to sort through the paperwork before we were pushing the bags back to the car for the 1 hour drive back up the TF1 and TF38.
After a hearty dinner, which was absolutely delicious and filling, we headed outside around 9pm to start setting up. This took me the best part of 2 hours to put the gear together after ferrying it from upstairs and then another 60 mins to calibrate and be ready to image. First up tonight is M23.
@ 23:55 started on M23 Open Cluster, 30s -25℃ exposures so not to saturate the stars.
M23
after 87 images escape hung!
@ 01:20 started on M18 Open Cluster 60s, 10 -20℃ or so images this time using TSX to image and then refocused and took 80 images in total.
M18
@ 3:22 started on M26 Open Cluster -20℃ took 68 at 60s
Visual this evening on the 22″ Dob. The 120 Esprit is still off the MEII so the IMT3b observatory is out of action for a few weeks whilst it is not balanced. The MyT and 120 Esprit are now packed away for the Tenerife trip which is really exciting, first time in over 2 years!
Bob came round this evening and we explored the rather bright sky given the time of year with the dob. So what what did we see?
Observing Notes
M5 seen 23:21 31mm and 13mm better than M3
M3 resolved easily 23:17 31mm and 13mm more compact than M5
M51 massive filled fov in 13mm much smaller in 31mm
M92 seen both eyepieces and very bright
M57 13mm only very large AV central star, very big ring
M96 galaxy in LRGB on the 12″. Focus position 20691. Started at 22:29. Set up for 4 hours before it disappears behind the trees on the West side of the Meridian. Looking to take 24 x Lum and 8 x RGB all at 300s. Left the dome running and off to bed.
M96 Luminance 300s
The next morning I reviewed the status of the dome and imaging run and it ran al night without a glitch which was great. However the focus drifted quite considerably so I will need to throw away some of the data. What I need to do is cool down the observatory and the mirror before hand which last night I did not due to the last minute decision to image. Also getting the temperature compensation working on the focuser would help, so maybe time to revisit.
I will do another run on M96 on the next clear night.
M36 with Esprit 120 from the dome until 23:45. I took 60 x 60s and 60 x 120s to try and reduce star satuaration.
M36 60s exposure
To guide on the 12″ tonight I realised the camera was not in focus, so I connected the focuser and moved from pos 14000 to pos 21000 which allowed me to get a much higher than 25-30 star signal to noise ratio SNR than before when it was sub 10 and this guided perfectly with perfect star profiles too.
I then went to bed, awoke early at 1am and set the Esprit imaging M59 and took 36 x 300s before heading back to bed. The imaging stopped at 4:35am. Later in the morning when I awoke I took Flats as I had darks from the other night.
After a presentation to BAS on the Obsession 22″ I opened the dome and set about imaging M61 RGB. I managed to take 6 x 300s of each channel at Gain 139 Offset 21 Temperature -25℃ before the dome closed around half past midnight, not sure why.
Another clear night, so many in a row and a lovely warm spring day of 18℃ I’m out again 🙂
I’m grabbing some more M61 luminance tonight before I move onto RGB. Some teething problems made me start much later than desired, including a cable coming out the back of the mount for the power to the QHY168C, not sure why. So I did not get going until around 8:30pm.
I managed to grab 21 luminance frames at 300s until around 11:30pm when the the guider lost it’s stars. This is a setting problem as it was clear all night. I knew before I went to bed that there was an issue as I had seen the guider stop guiding. I will take a look at it and calibrate the guider using guider assistant after BAS tomorrow night.
A quick imaging run this evening, again for NGC 1999, this time LRGB, 5 frames of each at 300s then it was too low and my bed time on a school night 😉
Before shutting down I made sure the Tak 102 profile for the dome was correct for the 120 Esprit as it is fixed on the same side of the 12″. I then slewed and it centred fine and the dome was in the right position. I tweaked the focus too in preparation for the Messier Marathon with Basingstoke Astronomical Society this Friday.
After a glorious sunny Sunday where I spent a lot of the day building the new decking for the Summerhouse for my wife, I planned on a short, sharp observing session until 9:30pm (turned out to be nearer to 10pm) starting after dinner at 7pm. In preparation for this I setup the 22″ dob on the observing patio and opened the dome for the 12″ to start to cool down whilst I ate with the family. My daughter and her boyfriend’s famous pasta dish was for dinner tonight which was great 😋
22″ Obsession ready to go
With dinner finished I headed to the sofa and set the 12″ running on NGC 1999 in Luminance so I could then go out and observer with the 22″. It took a while to do the usual, sync and centre on a star, get the focus right and set the imaging run up. But after 45 mins I was then able to wrap up warm and head outside.
I have read an article in Sky and Telescope of visually observing NGC 1999. With that information I opened my newly acquired Interstellarum Deep Sky Atlas to look at the area where NGC 1999 resided. I then referred to the Deep Sky Guide to look at the photos and drawings of the objects in the vicinity including this reflection nebula.
Deep Sky Atlas
There was a potential to observe two Herbig-Haro (HH) objects but I was afraid the sky would be a little to bright given the Moon rising at 9pm, in order for me to see them. I placed the 31mm Nagler in the 22″ and then dialled in NGC 1999 into the handset and pushed the scope until the numbers for Azimuth and Altitude were as close to zero as possible and looked through the lens. Surprisingly I could see a small fuzzy object with a star embedded to one side just off centre in the eyepiece. I reviewed the star chart on my phone using Sky Safari 4 and confirmed this indeed was NGC 1999. I guess it was just off centre due to my alignment and next time out I will use the 13mm Nagler to centre and align the scope during the initial setup.
31mm Nagler
On looking at the reflection nebula I could tell there was something to one side of it due to the offset nature of the nebula to the star. I changed to the 13mm Nagler and set the Paracorr accordingly back to H from the A setting for the 31mm Nagler. I then recentred using the Argo Navis computer and too a peak through the eyepiece. I could now see a distinct whole in the nebula, but clearly not as good as the Hubble image I had looked at, however it was there. I ten went looking for the two HH objects but I must say I could not confirm them at all. There were two star like objects near by but again looking at my Sky Safari star chart I was not convinced. I would leave this for another night when the Moon was goner and I had cooled the mirror with the fan, that is still not connected to power yet.
For a laugh I then pushed to the Horse Head but could not see it, not surprised given you need a Ha filter. I will buy one.
I then had a quick look at M42 again which is a wonderful sight in the scope. Orion was now getting low with NGC 1999 and M42 at +18 degrees at about 9pm. I then started to pack away the scope to head in doors and look at the 12″ and see how it was doing.
NGC 1999
I reviewed the set of images for NGC 1999 on the 12″ and now due to the altitude I switched and set the scope running on M61 for Luminance and RGB as it is on my list for my Messier wall chart.
At 10pm I left the dome capturing M61 LRGB frames and hit the sack.
So after a successful day at The Practical Astronomy show it was time to head on out to play with my new toys. In this case a new 31mm Nagler Type 5 2″ eyepiece that I purchased from Owen Brazzel.
31mm Nagler
The other aim tonight was to setup the Argo Navis computer to allow me to find objects in the night sky on the 22″. Owen had said to me at the show that this is a must else I would find it difficult to star hop from one object to another without it, which was proved out the last time Bob and I ventured out.
Argo Navis
So I went to the Workshop where the Dob is stored and took it out onto the observing space and started to put it together. It only takes about 15-20 mins and then I set about collimating quickly with the laser collimator.
Laser colimator
Once done I fitted the Paracorr optical corrector followed by the 2″ eyepiece. I then set about putting the cables in for the Argo Navis computer and clipping it onto the side of the 22″.
It took me over an hour to finally setup the computer, in the main I did not RTFM and finally succumbed like all good blokes to reading the manual. It was them extremely straight forward. I had a good look through the menus to familiarise myself, but really the only thing to do was to identify 2 stars. The process for this must be followed for it to work correctly.
So I selected Mode Align Star option form the menu clicking the Enter key, then selected a star using the Dial, in this case BETELGEUSE came up. Now DO NOT PRESS ENTER!! Put the star in the centre of the eyepiece and then press the Enter button. Then WARP= +0.00 (1) should appear briefly meaning 1 star is aligned. Now using the Dial select another star (in this case SIRIUS) and repeat. Once you select ENTER then you see WARP= +0.00 (A) which means aligned. Now you are good to go and use the catalogue to tour the night sky.
I then selected some objects including M42, which looked lovely but low, the double double which really allowed the eyepiece quality to show off its abilities. I went round few other objects and Luke came out too, In fact to be fair he helped me get the computer working and then we shared the views in the scope. It was a good evening. We then between us took the scope apart and put it back in it’s home.
Obsession in use with the light on for the photo of course 🙂
went out and put ZWO ASI120MC on the back of the ST80 guide scope. Refitted the Lodestar to the off axis guider. I then setup the FoV indicator on TSX and also got the guider to focus.
Took a bunch of M78 frames LRGB to start with. Then tried a 600s Ha but that showed very little.
Then joined by Bob joined and he reminded me to image JWST.
Then around 12:30am I started imaging M78 again on the other side of the meridian. I must sort out imaging with a frame so that it is easier to get the object inside the FoV and lined up as it took me quite some time this evening. Plate solving was also not working again within SGP so I need to look at that on the next night out.
When I started attending the Practical Astronomy Show held at Kettering I picked up my first copy of “The Night Sky Observers Guide Volume 4 – The Glories Of The Milky Way to -54°” written by George Robert Kepple and published by Willmann-Bell inc. These were sold at the Kettering show by the very helpful and knowledgeable staff of The Webb Deep-Sky Society for around £20.
Then in December 2019 ‘The Global Human Malware’ happened and the world went nuts, the Astronomy shows were cancelled year on year and I forgot to complete acquiring the rest of the series. Then suddenly in late 2020 it was announced that the publishers Willmann-Bell had closed and their entire portfolio went out of print.
Unfortunately I did not see the announcement until late Jan 2021, however I managed to obtain a copy of “Volume 2 – Spring & Summer” (ISBN 0-943396-60-3 (V2)) from Zoltan at 356 Astronomy but he told me he was out of stock for the rest of the series.
I contacted the Webb Deep-Sky Society to see if they had any available copies in stock. The president of the society Owen Brazell very promptly replied but informed me that they had sold their remaining stock just days before. He was extremely helpful in trying to help me source any remaining stock but eventually to no avail ! I recommend any avid astronomer should consider subscribing to the Webb Deep-Sky Society here …… I just did 🙂
Well, it arrived this morning and I apologised to my regular postman for having to carry it around by hand all morning.
As with the other volumes the information, maps, diagrams and descriptions are very useful for planning imaging or observing sessions.
The King of the Northern Winter Constellations – OrionThe fantastic Perseus Galaxy Cluster
I now have only Volume 4 “The Southern Skies” left to purchase but as that would only be a reference for objects I can’t see from the UK it would go mostly underused unless I start using my remote telescope account or travel around or below the equator.
I would like to thank Owen Brazell for all his time and for the ongoing activities of the Webb Deep Sky Society and hopefully we will see them at the next Practical Astronomy Show in March 2022 …. fingers crossed !
Clear night! So I’m going to setup and let the dome run all night if it stays clear which is the forecast as I have work tomorrow.
All Sky Camera
I have run the guiding assistant on PHD2 so that I can hopefully better track objects. The drift in frames from the last time out whilst using the ST80 as a guide scope was less than ideal. I have now put al the new settings suggested into the PHD setup and have swung round to do a focus run on a star near to M32.
PHD2 new settings
After successfully running autofocus in SGP at 23,560 on Luminance I have now slewed to M32 to gather more data that is desperately needed to resolve the outer spiral arms of the companion giant galaxy M31.
SGP Focus RunM32
So it is now just gone 9pm and whilst the guiding is managing to stop trailing of stars, the image is moving between frames, enough to loose the object over the course of 4-8 hours. This is clearly not good enough and it does look like the focal length of the ST80 is simply not long enough.
To get around the problem this evening I have turned guiding off, as the exposures are short (3 minutes) the trailing of stars is not an issue. At midnight I took flats for M32. I then centred on M78 for the rest of the night. Before starting I performed another focus run as the focus point had changed over the night with the temperature drop.
Auto Focus
I choose the same exposure settings and Gain 139 and Offset 21 settings as for M32. -25C was the temperature but this time I rotated the camera by 90 degrees to also fit in NGC 27309.
M78 & NGC 27309 and a satellite trail
So I left the scope running and it completed at around 2:30am with 40 frames taken across 4 filters giving me 30 minutes per channel. This will be enough to get started and if clear tonight I will setup for another run at M78 and hopefully improve the guiding.
Update. On reviewing the files this morning it looks like I forgot to select the filter in SGPro which means all my M32 and M78 images from this evening are in fact luminance only! Which is ok for M32 but for M78 I need some colour. Below is the weather data for last night.
I started with M76 Ha as I need some frame for this object. I already have many hours in OIII. However after starting to image I realised the guiding, which is currently being tested through Dave Boddington’s ST80 was not pointing through the slit correctly as M76 was near the zenith. This means I have suffered from trailing as the guider was trying to guide on long stars due to diffraction.
M76 – 1 x 600s Ha
I swapped to a different object, this time M32 as I have not imaged this directly before, just as a happenstance of imaging M31. I have chosen 180s exposures using Gain 139 Offset 21 to keep the saturation of the core down. At 300s the core was blown out.
M32 – 1 x 300s Lum
M31 can be seen to the left and lower left of the small galaxy. M31 covers a large part of this image! So how well was my guiding doing?
Guiding with the ST80 guider
The guiding looked fine. 0.52 arcsecs total error which I am happy with. I stayed up until just before midnight and then left the observatory running. In the morning I noticed the dome shut around 1:30pm due to the images after that looking like flats.
I also noticed this morning that the images were drifting so the guiding is not quite right as the image drifts. I will next time out run the guiding assistant and see if that helps.
Update the image scrubbed up fairly well but I lost a lot of frames to drift and trailed stars and then the dome closing. Resulting image around 3 hours 12 minutes exposure of which 48 mins was Luminance but there was cloud affecting many frames.
So visiting Dave one evening as we have not met for a while whilst I was updating software Dave processed the QHY268C data we took of M45.
M45 – PixInsight Processed Image
So I’m disappointed that although the image is a good first start I forgot to change the change setting on the gain which in SGPro is in the event settings and not in the top level sequence display 🙁
Dave ran the image through the annotate function of PixInsight. The galaxy PGC13696 near the bottom of the image is actually 232 million light years away.
