Luke and I setup the S30 Pro with the Antlia Triband RGB filter to see what difference it makes.
Meanwhile I have taken the Telegizmo cover off the 180 Mak ready to go after the Moon at midnight and Saturn again after 2:30am.
After waiting for the majority of the “night” as it is, at 10 past 1 I slewed to the Moon and started to image using SharpCap 4.1. The image was not great as the seeing due to the Jet stream being overhead was not ideal, but it gave me a start on re-imaging pieces of the Moon. I managed to at least grab a single stacked image of the 3 large craters at the edge of Mare Nectar’s, namely Theophilus, Cyrillus and Catharina.
Bottom left to top right of the crater chain – Theophilus, Cyrillus and Catharina
I must admit to having problems with remembering how to use the ADC so I will watch a video over the next few days.
Meanwhile the S30 Pro also struggled under the not dark skies but again produced an ok image given the lighting conditions.
I had been seeing a small problem with the Seestar S30. I noticed on holiday that the top left corner looked out of focus. I contacted the brilliant ZWO support and they suggested it might be a focus issue in that it was not focused properly. Tonight I thought I would refocus and take some more images to see. This is what I saw.
As you can see the image is almost perfect. Much better than the affending stars from the trip up Tenerife’s mountain Teide recently. Problem solved. It had clearly not auto focused correctly. If I see the same problem again I will simply re auto focus. Here is another of Mizar and Alcor in the handle of Ursa Major.
Mizar
Onto the other test for the night was the Canon 6D that I have and testing it again with the Samyang 14mm f/2.8 lens for use in Namibia. I set about shooting so images on the twilight sky and the stars were pin sharp.
I also liked this one with a longer exposure and thus the clouds captured in motion.
I collected the new ZWO Seestar S30 Pro (S30P) today. I thought Luke and I could give it a little run, even though astronomical darkness is no longer with us until August.
I setup the S30P here on the observatory patio. Luke setup the S50 at his house. We then took a variety of test images on both to compare the different scopes.
Whilst I waited for darkens to fall I took a quick phot of Venus and Jupiter close together on my iPhone.
Venus & Jupiter – iPhone 15 Pro Max
Then we setup the S30P so that it could be used remotely. You can share the scope but only 1 person can be logged in at any one time.
Screenshot of sharing scopes
First we tested out just getting focus on Arcturus and seeing what FoV we would get with the much larger chip of the S30P.
Next we slewed to M13. Given the light nights it’s better not going for a galaxy or nebula.
M 13M 13
Then I went fore M27 on the S50 only but I had problems with red banding on the photo. It must have been some interference, however I was not quite sure I knew from where.
M 27
Then I did M10 on the S50. At the same time I did M92 on the S30P as M10 was poorly positioned.
M 10M 92
I then tried a Milky Way shot but this was too faint due to the night sky being so very bright.
Milky Way
Lastly I set the S30P performing a short Star Trails image on Polaris.
Whilst in Tenerife on a family holiday I was fortunate to have some clear spells in the cloud cover that seems to build up in the evenings on many occasions and hug the mountain side. Fortunately I have moved to a different villa, this time down at Playa de la Arena in Santiago del Teide. Whilst the villa is further away from the central mass of the mountain, the light pollution at the coast is much higher, not just moonlight, but also streetlights and wall lights!
But this did not deter me. I setup the Seestar S30 behind a chair, believe it or not it helped. I then setup a path to image between the wall on the left and the larger house roof on the right as South was directly towards the main gate. I could not go the other side of the covered seating area due to further street lights.
I slept for a few hours from 1pm before I started imaging as all the interesting objects in the Milky would not rise and appear in my small window until 3:30pm. The slot I had was from 153 degrees to 184 degrees at an altitude no less than 33 degrees so just past the Meridian.
First up was M20 and I could fit M8 in at the same time. I took 30s subs with a total of 30mins for the final image. I dropped a few frames due to wind gusts that were knocking the little scope about every now and then. I then processed the image in PixInsight. Note that due to the excessive light pollution I had to go easy on the sharpening with NoiseXTerminator and also on the colour saturation, even though I was using the light pollution filter built into the scope.
After this I slewed over to NGC 6520 an open cluster which includes a Barnard dark nebular B86. I did struggle with the colour on this as it really should be a golden hue to the whole region, but alas I put this down to the light pollution and possibly the abilities of this little scope.
The last deep sky object for the night was M16 the Eagle nebula. Again I used 30s subs and a total of 30mins, then processed in PixInsight.
Last up for tonight is the Moon at 21.6 days old waning 56.4% Seestar S30 cropped.
I have the travel scope setup on the patio next to the observatory. Unfortunately I’m waiting for my camera to come back from the dealer so I cannot use the 12”. So instead I have the 100Esprit ready to image SH2-129 an emission nebula with an OIII object called The Squid in front of it. I have the Askar C1 filter in place and will see if this filter which covers Ha + OIII emissions catches it.
I have decided tonight to start to retake the 6 objects from the previous two nights. The Moon definitely had a massive effect and so did the cloud. I want to see what it’s like imaging without the Moon and clear skies. The Moon comes up at 11:16pm so I will image from when it is dark until then.
I have had a few intermittent problems with focusing over the last few nights. I have now realised it is worse when their scope is pointing directly up so the ratchet focuser must be slipping. I have taken it to pieces this evening and then reattached the EAF ZWO electronic focuser and bracket. It now seems to be working fine. Due to this issue I lost the first 90 mins of imaging this evening. It’s now 9:30pm and I’m back up and running, but will need to delete the first 7 or so images from this evening that are out of focus.
I started with M38 the open cluster in Auriga and managed to capture around 1 hours worth of 120s subs.
120s M38
It’s worth noting that there is a large black circle on the flats, I thought this was due to a smudge on the filter, however I have now cleaned that and it is still there. Therefore it must be on the corrector plate so I will look tomorrow.
Also I had some problems tonight with the guiding suddenly jumping. I put this down to the stretchy USB cable running to the mount getting caught, however on changing how it was connected I still had the issue so I need to further investigate. I will change the cable tomorrow to using WiFi which I have just found out I can do.
I took flats and darks.
By way of an update, it transpired that some of my problem with the guiding jumping was the 4s exposure I was using, reducing this to 0.5s-1.0s resolved the problem in the main. The only time I saw this again was then when the scope was pointing low to the North Western horizon possibly being effected by the street lights.
Following on from last nights cloudy weather, I have setup again tonight, and it is looking clear. I am imaging M38 again, I will use 120s subs and take the appropriate Flats at the shorter exposure as with the Triband filter it suggested 750ms on Auto however these are far to bright so I will reduce back to 500ms.
After 3 hours I had not only gathered much better data for M38, but also the clouds once again on this mountain had formed. I waited until 1:20am and then packed up as it was not clearing.
I started off with M46 open cluster tonight which has a planetary nebula, NGC 2438 within it. The waning Moon rose at 22:17, 88% illuminated and then started to affect my viewing, however I persisted.
M46 Open Cluster 2 Hours
Next I slewed to NGC 2403, a lovely spiral galaxy in Camelopardalis and let that run for 2 hours whilst I slept.
NGC 2403 1 x 300s
I also set the scope to then automatically slew to M66 and the Trio in Leo. However I woke around 3am and noticed that the sky was very bright with the Moon and there was some cloud around. I turned off the scope and went back to bed. None of the data for NGC 2403 and M66 was usable.
M66, NGC 3628 1 x 300s
I did take 300s darks for the previous night at -15℃ and some Flats.
Setup in the light polluted Adeje town north of the TF1. We are staying in a 3 story townhouse and I am imaging from the 2nd floor terrace.
New Camera
I have brought with me for the first time the ZWO ASI2600MC AIR and I am imaging with that using the small 220 built in guide chip for guiding and imaging through the Esprit 100 whilst trying to cut down the light pollution using the Antlia Triband RGB filter.
Light polluted Adeje
Focusing on completing my Messier collection, given the full moon, I am imaging M38 an open cluster. Taking 60s exposures to try and keep the chance of over exposing the stars, I am also West of the Meridian and at a starting imaging altitude of 55 degrees thus limiting the ingress of light into the telescope.
M38 Stacked and Annotated 101 x 60s
After 2 hours I moved on to M48 another open cluster. Again it was reasonably high at 42 degrees to allow for 2 hours of imaging before I hit the lights of the buildings. Imaging overhead is clearly what is needed after looking at the last few images of M38.
M48 Stacked and Annotated 102 x 60s
Another 2 hours completed and I then had a hard choice of what to image past the meridian, away from the Moon but before the lights of the buildings. I landed up targeting M109 to the left, along with NGC 3953 to the right of centre and NGC 391 to the far right. One of the stars making up the constellation of Ursa Major, 64 Gamma Uma can be seen. I went back to sleep and woke up around 7am to shut down the imaging run. A good first night.
After 2 nights of cloud tonight, night 4, it is lovely and clear. I am suffering from a cold, however I have setup and been imaging since 7:45pm. I have started with the 100 Esprit and placed the new Askar C1 (Ha +OIII) filter in place. I slewed to the California nebula and rotated the camera to fit the object diagonally across the chip as it is larger than my field of view. I plan on taking 2 hours with the C1 filter before I switch to the C2 (SII + OII) filter
Above is a single exposure of 300s
I managed to complete the imaging run then I tried to process but not with much luck. Fortunately I have a good set of friends who can process narrowband images and here is what they did!
This image above from Tim Powell
This image above from Dave Boddington
This image above also from Dave Boddington
This image above from Nigel Davison
This image above also from Nigel Davison
They are all great and I am so happy with what my friends have done with my data
By the time I had eaten and unpacked and built the telescopes on the mount it was 11:30pm, it then took another 30mins to decide where image from as Polaris was round the front of the property so not visible from the patio. it the. took me another 1.5 hours to sort out and calibrate the scopes and setup an image run on IC434. I had a problem with the focal length of the SharpStar 61 which turned out to be 275mm and then plate solving worked. I finally at 1:30am set about imaging and 30mins later Orion crossed the meridian. It then started imaging again.
The temperature tonight was around 6℃. I went to sleep at 3:30am and left it running but it lost connection to the mount and did not send guiding information to it so all my images from that point were no good. I will try again tonight on the same object.
My second night at the villa with the family. I’ve taken my Sharpstar 61 refractor with me this time with an effective focal length of 272mm. I normally use this a my guider for the Esprit 100 or 120. And I’ve placed it on the AM5 and have attached the trusty 50mm Skywatcher guide scope to it.
Ready to image
Luke has helped me setup this evening after managing to have an accident yesterday which caused me to have butterfly stitches to my shin 🤦♂️
So after about an hour of setting up, finding focus, working out the focal length and polar aligning we have set off to test the first image from this little setup. The FoV is 4.94 x 3.30 degrees.
Plate solve of the first image
NGC 7000 the North American Nebula that is almost overhead, thus removing problems with the pool lights that I have not yet worked out how to turn off.
We are taking 12 x 5mins with the ZWO ASI2600MC colour camera, cooled to -10℃ as the temperature outside is a balmy 21℃.
Single 5min exposure
Once done I will call it a night as I really need to turn off those pool lights.
Very windy night with 1.6’ seeing! I started with NGC 5982 Draco triplet but the wind was too high at 48.25 km/s! Trailing stars everywhere and guiding was useless at 36”!! So paused imaging until the wind dropped slightly. I continued to monitor the situation from the Teide Observatory Grafana dashboard page here;
Back up in my room I can hear the wind whistling past my window. After another hour the conditions were no better so I set the mount to run all night across 3 objects and went to bed crossing my fingers the ASIAIR and AM5 mount behaved well.
I was then delighted by sunrise that I had captured some useful data, not as much as I had hoped but good news enough. I had captured ok data for M11 of 12 x 300s subs.
M11 single 5 min sub
I also grabbed 19 semi successful images of M22,
M22 single 5 min sub
and lastly only 8 not great frame of M30 at the beginning of the night which quite frankly need to be taken again.
Tonight started with 0.7’ seeing. I was going to start imaging on the Dragons of Ara, however when I slewed I realised it was behind the mountain to the South. So instead I moved slightly up to M19 to finish my run on that glob from yesterday for around an hour in the hope the Dragons would clear the mountain by then and still be West of the Meridian.
M19 single 5 min sub
So by 11:30pm the 🐉 nebula had cleared the mountain and so I started imaging it at some 10 degrees altitude. I was not going to bother capturing more data on other nights as it is very low and the stars are bloated to about 6 pixels rather than 3 pixels. That said, once stacked and Blur Exterminator process was run it was very pleasing. So I may try to capture some more data.
NGC 6188 Dragons of Art – 5 min sub
After 2 hours it was a mere 5 degrees above the horizon and the star size had increased from 3.32 pixels to 6.01 pixels so I decided to call it a day and move to the globular cluster M28 at the top of the lid of the teapot.🫖
M28 single 5 min sub
After that I went on to grab 10 frames of the glob M30 before twilight.
A beautiful night with 0.8’ seeing. Started with a set of globs, namely more data for M62,
M62 single 5 min sub
a new globular cluster M80
M80 single 5 min sub
and globular cluster M19,
M19 single 5 min sub
then finally the Crescent nebula which I managed to grab just shy of 3 hours on. I ran all the way to twilight at around 6am and then packed up for bed by 7am.
Very calm night 0.7’ seeing and at the start little to no wind. The temperature was around 16-17℃ all night.
Started with Markarian’s chain again to gather better data than yesterday’s. Captured 15 x 300s tonight. I’ll do another final set tomorrow.
At 23:45 I moved on to M4 a globular cluster in Scorpius. I will continue with this again tomorrow night as I landed up with about 1.5 hours of usable data.
M4 Globular Cluster – stacked only
At around 2am I moved to M55 as M4 had got fairly low in the sky so I will come back to that tomorrow night. I did find there was too much time spent refocusing so I have now changed this to only as the temperature changes and at the start of a new image rather than every 30mins as well.
M55 Globular Cluster – Stacked only
I captured 3 hours on this lovely globular cluster.
Beautiful night slightly windy 0.9’ seeing at first but then changed dramatically later to around 2.2’
Markarian’s Chain suffered from many satellite trails, more so early on.
View from the iPad
12 x 300s so 1 hour of Markarian’s chain
By the time I started to image M39 the wind had started to pick up and I found even guiding at 60s was causing star trails.
M39 single 5 mins sub
So about 3am I started taking darks and then by 4:15am the seeing which was really the problem had settled down from 2.2 arc secs to 0.9! I went back and took 30 x 60s subs for M55 and then another 30 x 60s for M39 before heading off to bed.
So given it was a non-work night and predicted to be clear Dave invited me over to test the gear/setup prior to the BASEG Tenerife 2024 trip.
Given we are fast approaching the summer solstice, the nights are getting shorter and lighter. The Annual Darkness chart for IMT3 shows that we currently have no astronomical darkness and the nautical darkness lasts only for some 3.5hrs (left image) and now compare that the darkness graph for Mount Teide in Tenerife (right image) and although we lose some dark hours around the Summer Solstice it’s not as much as is lost being located at 52°N.
Setup – added BlueAstro stick station to measure pressure as Pegasus have not exposed the pressure measurement from the NYX101 mount to the ASCOM layer … why not ? Added weight bag to NYX-101 and GL.inet travel router to top of the scope as MS Windows keeps messing up the Wi-Fi hotspot on the Mele Quieter3C if it does not detect a internet connection ….. how stupid is that. Now I have a permanent hotspot thanks to the instructions given by Cuiv the Lazy Geek on his YouTube channel.
When attempting to polar align when using the QHY PoleMaster I noticed that the sky brightness below 15 mag2/sec (measured by a Unihedron SQM) produced a white screen due to over exposure – the minimal exposure in the now aged the QHY PoleMaster software (> 4yrs since last release) was 50ms which is too long even though I could eyeball Polaris in the early evening sky.
NINA 3.0 start up had not detected the QHY native driver and after I shutdown and restarted the app it then was able to detect the QHY 268C camera. However, it disconnected when it could not cool to -10℃ which I’ve never encountered before. I did eventually managed to get it cool and stay connected.
During guiding calibration OpenPHD2 would constantly complain about losing the star. Again the star was clearly visible on the PHD display and after downgrading from 2.6.13dev4 to dev3 and then I suddenly realised the value the error was referring to. I changed the minimal star HFD down to 1.0 from 1.5, also recreated the dark library to remove the possibility of the guider attempting to guide on a hot pixel.
Once guiding, the guide graphs were reporting 0.08 – 0.19 arcsec total polar alignment error. Hopefully I will learn to improve that and maybe repeat the polar alignment procedure or use PHD drift align to refine it.
I also forgot to change filter at the start of the evening from the Antila Quad Band filter to the Baader UV/IR filter. I noticed a halo from the bright star Arcturus in the constellation Bootes which I was testing autofocus on but I decided to continue regardless as I was only testing.
The goal for the night was to grab a base image of T Coronae Borealis (“The Blaze Star”) before it goes nova – it’s a reoccurring nova with a 80 year cycle. The star is currently hovering around 10.2 magnitude and it is predicted based on previous eruptions to reach around magnitude 2. As I ultimately wanted to perform some photometry on the star using the UV/IR cut filter I did want to blow out the cores of any bright star so I opted to use the ExtendedFullWell2CMS mode at gain 0, offset 30 with 60 second exposures. During the sequence I forgot to watch HFR/Star count graph and it rose above 5 which meant I have to refocus to (HFR ~2.0) and so due to my oversight due to chatting I will have to dump a lot of the early subs.
At the end of nautical darkness I stopped the sequence and used the NINA flat wizard (dynamic exposure) with the old PegasusAstro 120 flat panel at 100% brightness to create 25 flats and flat darks for a target of 33% ADU. After packing up and the with the pre-dawn temperature hitting 4℃ just before 4am I was looking forward to getting to bed.
At the next clear non-working evening I will attempt to grab some subs again but this time using the correct filter. Thank you to Dave and family for hosting me once more.
NB – NINA 3.1 was formally released the following day (09/06/2024) !
