Not entirely clear this Bank Holiday weekend, however good enough to test out the newly cleaned ASI1600MM with the new desiccant. I received the desiccant from Zoltan at Astronomy365 and cooked in the microwave for 2 mins on medium power before letting cool down and then placing in the camera. I managed to get most of the dust off the sensor, however it is very difficult.
At 00:15 I started to image M72 the globular cluster low down in Aquarius using LRGB 60s on Luminance and 300s on RGB. Note that I will need all new flats today due to the cleaning of the camera. I will leave the observatory running overnight and head off to bed.
Update from this morning, looks like the observatory run all night without a problem and however I believe the object went behind the trees in the distance that have grown after about 10 luminance frame 🙁 I took flats this morning and will take darks tonight.
Back for a second night tonight. M26 is the target again to get some more quality data on the open cluster.
I will set the camera back to Gain 10 Offset 10 to allow for maximum exposure with minimum star saturation. I have had some cloud this evening so far which caused the dome to close. Now it has cleared I have reopened.
Focus run at 22:04 gave 15,965 on Luminance. I left the observatory running at around 12:30am and headed off for bed.
I noticed in the morning the dome had closed and the imaging stopped 40 mins before completion. There may have been clouds so I will check the rest of the frames later. I should have then refocused again later as it drifted again. I reviewed the LRGB frames however the guiding was not brilliant and some of the frames have trailed. I took Flats and Darks in the morning for completeness.
First tonight was to take some 300s darks for the other night for NGC 6765. I only needed 5 of them so spent the first half hour on that.
Then looking at what I could do before the Moon comes up around 11:30pm, I have a couple Messier objects on my list to go after. M26 is the initial one to tackle. I will try a low exposure for luminance and longer on RGB.
Initial focus position is 17,782 for Luminance. I then had to take a new set of darks for the Lodestar camera. I am not sure why these no longer match.
@ 23:53 I started imaging M26 LRGB, L = 60s, RGB = 300s
M26 – Red 300s
Focus run at 1:06am 16,879 for Luminance
Finished imaging just before 2am when the object was too low and the bottom of the dome slit was in the way. I then went on to grab flats and darks.
Tonight John Barrie-Smith and Bob came round to observe with me from Mirador Ellisfield. The temperature has been warm +24c and the humidity average. I assembled the 22″ dob and brought out the 100mm binos.
Bob had a pair of tiny binoculars which whilst we were waiting for darkness to arrive we thought we would try them out. To our surprise when looking at the Moon we could see a star to the East which transpired to DSschubba, a mag +2.2 star in the constellation of Scorpius. This is top star above Antares in the scorpion. This was unseen with the naked eye.
We then realised that the Moon was going to occult this star and that we could watch it happen. So with Bob on the Binos, JBS on the 22″ and I with my Canon 6D with the 300mm lens, we set about watching the event.
We caught the star being occulted by the Moon, but then we struggled as the Moon was setting behind the trees in the distant forest. However around 22:13:20 the star reappeared just as the Moon was setting around +4 degrees altitude. A good result!
Moon setting with the star hidden behind
So after a thrilling and unexpected chase, we set about using the 22″ for some visual. I had started SkyTools 4 for the first time earlier in the day and created my first observing chart. I printed a list of objects to go after and we used this to work through some very appealing and easy targets.
SkyTools V4
M21 was seen by JBS and I before it quickly set behind a tree, however this open cluster looked great.
M102 was easy to see with direct vision. This galaxy looked splendid through the 13mm Ethos eyepiece. This was a long thin galaxy with a slight bulge to the centre. Whilst SkyTools did state the 24mm Panoptic was the best eyepiece to see this with, we felt that the 13mm Ethos was a good option and provided the best view.
John then wanted to go to M101 the Pinwheel galaxy. This is a face on spiral that has a low surface brightness and was rather hard to see. We tried all 3 eyepieces, so the 24mm Panoptic, 13mm Ethos and 31mm Nagler. To prove that this was because it was a harder object to see with relatively low surface brightness and thus did not appear on my SkyTools list of Easy and Obvious objects to see, we set about looking for M51 with it’s associated NGC NGC 5195 interacting galaxy. This was as we noted fairly faint to see also but rather distinct with the 2 objects being visible.
We also looked at an open cluster called the Cooling Tower, M29 or NGC 6913, Bob could see the cooling tower in this little cluster of stars which was bedded into the Milkyway’s rich star field.
We then looked at the Blue Flash nebula, NGC 6905 which did indeed resemble a flash in the pan of oil.
We then went to M5 a glob that was very low down and did appear on the list. The scope was all but horizontal but provided a good view despite the seeing.
Finally we stole a look at M13 which was to compare with M5 and wow it was really bright and steady and the details of the stars within especially with the 13mm Ethos were amazing. It is worth noting that it was fairly high in the sky unlike M5.
Once Bob and JBS packed up and went home around 12:30am I slewed the 12″ in the dome to NGC 6905 the Blue Flash and too a single 2 min Luminance exposure to see what we had seen.
Blue Flash Planetary Nebula NGC 6905Blue Flash cropped 2 min
I then loaded my sequence for NGC 6765 and took a set of LRGB and OIII 300s exposures, x 5 each until 3:45am. I left the scope running until morning and went to bed at 2am. A really good night with friends.
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.
