4 Epsilon Lyra Double Double star – 31mm I can see the double but not split the 2 stars; 13mm Ethos allowed me to split the doubles and the 10mm whilst slightly dimmer afforded me a slightly wider split
Cat’s Eye Planetary Nebula – 31mm very small not quite pinpoint of light visible nicely without a filter, OIII filter makes it slightly more apparent and Nebustar filter it looks marginally better; 13mm Ethos provided brighter nebula, again the filters provided a better view with the Nebustar being brightest; 10mm is the best view of them all with a definite oval shape East or West, right to left but now OIII produced the brightest and clearest view although it is pushing the seeing tonight
Turtle Planetary Nebula – Not seen
Rasalgethi Alpha Hercules Double Star – 10mm too much for tonight, could not get good focus but could easily split; 13mm Ethos the best view with brighter primary in yellow, very striking and smaller secondary blue; 31mm Nagler just splittable but both components look yellow.
Albireo Double Star – Bright large yellow primary and smaller but still bright blue star in the 13mm Ethos
M13 Hercules Globular Cluster – lovely in the 31mm Nagler; 13mm Ethos much brighter view and obviously larger with resolving more core stars; 10mm darker background so contrast better and even brighter core and stars more obvious with direct vision, including nice pair at 10pm on the cluster
M57 Ring Nebula – planned but not attempted
61 Cygni Double Star – planned but not attempted
NGC 6891 Open Cluster in Lyra – not seen in 31mm Nagler
NGC 6702 & NGC 6703 Galaxy pair – planned but not attempted
A really good night overall, the eyepieces lent to me from Bob are excellent and make the viewing more pleasurable being able to switch with my wider field of view ones.
Tonight was a visual night. GingerGeek and I used the 22″ Obsession Dobsonian to view some of the wonders of the late Spring sky.
We started with Venus with the aid of a Moon filter. Whilst Venus is bright and not too overwhelming in the eyepiece, the contrast afforded by the addition of this particular filter aids the clarity of the image as Venus sits on the bright backlight of the night sky this time of year. Venus is in a gibbous phase and you could clearly see a concave arch to the edge of Venus that was missing. The seeing was very steady and we were able to push to 179x with the 13mm Nagler.
Next up was Mars. Whilst it took a while for it to appear in the astronomically twilight sky, I swept the area North East of Venus and landed the target after a few moments. Mars was so very small compared with Venus, obviously red as seen without a filter in this case and slightly shifting in colours due to the seeing. By the time we had finished looking, Mars had appeared in the night sky.
Now the sky was getting darker we wanted to start on the deep sky objects. It became apparent very quickly there was a problem with my alignment. This was a problem I faced the last time out and the trouble is with he RA encoder. The RJ11 cable has been pulled and needs recrimping. So for tonight it was about star hoping only 🙂
We then went on to look at globulars M3, M92, planetary nebulae M57 the Ring nebula and M97 the Owl nebula. We tried to get M101 but the sky brightness would not allow it. We also looked at Mizar and Alcor that I could see from 11:30pm as a double, and we looked at Polaris and it’s double star companion SAO 305 through the scope.
The planetary nebulae were seen through an OIII filter and Tele Vue Nebustar filter. I thought the view was slightly clearer through the Nebustar filter, maybe due to the slightly wider bandwidth which includes H-Beta. The Ring nebula was very crisp and I thought I could discern the central star which is 12th magnitude. Our friend Bob was kind enough to lend me a set of eyepieces he recently acquired. The Tele Vue 10mm Radian eyepiece gives 230x through which we could see the central white dwarf.
Whilst looking at the globular clusters we pushed the magnification to 288x with the 8mm Tele Vue Radian. Both this eyepiece and the 10mm gave fantastic views with the globulars sparking with pinpricks of lights from the 1,000s of Suns!
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
GingerGeek, Alan and Bob came over. GingerGeek brought over his 4″ dob and set it up on the patio slab tower. Alan Lorrain then went about aligning it on the Moon.
Alan finds the Moon with Bob watchingTarget acquiredMoon through Dob
So with the Moon successfully acquired and whilst GingerGeek started looking at other targets through the scope, I opened the dome and slewed the 12″ to the Moon too.
Moon through 12″
Alan, Bob and GingerGeek found a small bright mountain inside the terminator. We decided to try and find it through the 12″. When we did find it we then tried to work out what it was.
Mountain inside the terminatorIt looks like the island of La Palma!
It transpired to be Mons Piton, named after the top of mount Teide on the island of Tenerife. We would need to view it the news night to see it in full daylight.
Sky Safari
Next up was a quick look at the Ring Nebula M57.
M57
We then wanted to seed if we could make out the central white dwarf.
M57 Red
However through the Red and Blue filters and the Luminance filter we could not see it. Finally through the Green filter it stood out very well.
M57 Green
Whilst slewing around with the 12″ in the dome, I had also setup the travel scope with the Mak 180 on top. I wanted to grab some data on Jupiter in particular and Saturn just as it was nearby,.
Jupiter being imaged with Mak 180Saturn through Mak 180
I took a whole bunch of data for the next hour or so which I will process at a later time.
GingerGeek and I were out imaging tonight. The sky unexpectedly cleared and we thought given the impending move of IMT3 to another site that we would try to gather some more data on M57, specifically LRGB and some additional Ha on the 12″.
We ran Autofocus on Luminance which gave 60,671 at 20.64℃ and HFR 6.5. We then started to image and after a few frames the temperature started to drop. In the main this is because we opened the dome last minute rather than a minimum of 2 hours before we used it so the dome was warm and now cooling down the optical train shifts.
M57 quick frame and focus
We refocused to 62,712 on luminance at 19.10 with an of HFR 5.15. We then ran the image acquisition and below is a screenshot of the guiding, which looked like it was going to cause an issue but it was ok. If it had then it would have been the local fog rather than anything on the mount. At midnight we performed a Meridian flip nice and early which afforded us to leave the observatory running and go to bed. Notice the graph below, the yellow line drops as we performed the meridian flip, this is due to the dome now shielding against next doors light !!!!!!!
Guiding ok, notice the drop in the graph
The neighbours light continue to be a pain as can be seen here, I really cannot wait to move the observatory to it’s new dark site.
LIGHT!!!!!
Finally managed to capture LRGB and Ha, below the RGB and Ha frames can be seen in PI. Note the central star is not visible in the Ha frame,
RGB and Ha raw frames
Finally I stacked 1 of each colour without calibration to see what it would look like.
RGB quick single stack no calibration
So we left the observatory imaging, I had a quick peek outside around 12:30am and there was water running off the dome and the outside windows of the orangery! The Observatory ran until the dome shut at 3:58am (it woke me up) when the light levels started to rise.
Tonight I thought I would take some more images of M57 through the 12″ in OIII and then Ha. I first got the OIII filter focused at position 62,500 with a temperature of 22.42℃, I took 10 more images at 600 seconds.
Guiding was good even though there was high level cloud, seeing was good
Ha was then started at 00:44 after meridian flip. I spent some time looking at comet C/2020 F3 NEOWISE through 100mm binoculars with Helen, Ezri and her boyfriend Luke. Then we took some photos with the 50mm lens on the 6D.
Comet C/2020 F3 NEOWISE
I went to bed at 2am and left it running. In the morning I noticed I had 10 good images then the image moved due to guiding problems due to cloud.
GingerGeek and I decided to go after M57 the planetary nebula in Lyra. I had seen a lovely photo on Flickr with the outer Ha/OIII halo showing which resembled a splat of paint, taken with 9 x 1200 seconds Ha, 3 x 1200 seconds OIII and 9 x 600 seconds luminance. So we decided to go try. It would also add to my ongoing collection of Messier objects.
M57 in OIII
The resulting image of M57 was rather small as can be seen above. We initially set an autofocus run on Ha which came in at 67,213. We then focused on OIII at 67,178. After a few frames we noticed that the focus point had shifted ever-so, thus we refocused at 23:33 for OIII and to a position of 63,610.
The OIII focus exposure length was 20 seconds on a magnitude 4 star which completed very nicely. By the time we had gathered OIII for 9 x 600 seconds the clouds rolled in. We took Flats. GingerGeek ran the whole session remotely whilst I directed 🙂
So back off to Combe Gibbet again tonight for hopefully a full night until dawn and with a coat. I met with my friend Alan for once again some social distancing astronomy. Again Alan had a much better 4×4 car to get up to the gibbet than my little electric Nissan Leaf, however once again I managed to make it there.
Sunsetting with Esprit 120 and Alan in his chair
After setting up, it quickly became apparent that I forgot the guide camera as it was still attached to the Mak180 that I thought I would leave at home tonight ?
Quick look and focus on the Moon
So despite the slight setback I polar aligned on the uneven ground and managed to get the scope pointing in the right direction. It took me a while to work out why it was not pointing at the objects when slewing with a perfect alignment, then I realised I had the location set incorrectly. A quick look at my GPS on my phone and I input the coordinates into The SkyX and the target was nearly spot on. I adjusted, performed a sync and then was able to slew continuously thought the night with the object in the FoV.
As I was challenged with no guider I could only take 2 minute images and if in the West low down then 1min. So I stetted for those 2 exposures along with 30 seconds for one particular object.
Below are the lost of targets I went after and imaged. I tried to get 15-20 minutes in total for each. We had some early night high cloud, the wind had again dyed down after sunset and although cold, we were both wrapped up warm, although later in the night Alan became cold so wrapped himself up in the dog blanket from the car ?
First up was M44 Beehive Open Cluster, which filled the view nicely so I took 20 x 60 seconds, careful not to saturate the stars. The QHY168C camera was set to Gain 7 and Offset 30 with a temperature of -20℃.
M44 60s
I then tried SH2-129 emission nebula but no luck, it was not registering at all at such short an exposure. I had a similar issue with SH2-155 Cave nebula. Both of these I will try again when I have my guider.
I then slewed to NGC 6888 Crescent nebula and took 20 subs of 120 seconds.
NGC 6888 Crescent 120s
Next tried to image Trio in Leo M65, M66 and the NGC but I realised I had already imaged, although not processed and the image trailed at 1 minute due to its westerly location. So instead I headed for NGC 7243, a lovely Open Cluster in Lacerta and part of the Herschel 400 at 60 second exposure.
NGC 7243
Next I looked at the double cluster in Perseus and decided to quickly take a few images with the Esprit 120 ED even though it was not on my original target list. Due to its bright stars I took 40 x 30 seconds.
Doublers Cluster in Perseus
Now it was time to grab an image of Comet c/2017 T2 PANSTARRS which was located near a galaxy called the Coddington Nebula. I purposely got the comet at the very edge of the frame to get the galaxy in, although I noticed the tail was pointing in the opposite direction than shown on Sky Safari.
Comet C/2017 T2 PANSTARRS and Coddington Nebula
The night wass really dark, even though it is not true astronomical darkness, the location really helps. The image quality is also much better. I slewed to NGC 7000 the North American nebula that Alan was also imaging. Again 60 seconds was probably not long enough so I need to come back to this object when I get my guide camera fitted.
NGC 7000 North American Nebula 60s
Finally just as dawn was approaching and the light was clearly increasing, I took a few images of Comet C/2020 F8 SWAN to see if I could see it. Was was apparent was it was super faint even at 60 seconds !
Comet C/2020 F8 SWAN
So as dawn approached, Alan and I took flats, darks and flat darks.
During the night we viewed through the 4″ binoculars the Moon, Venus, Mercury, Double cluster, M39 Open cluster, M57 Ring Nebula, Alberio, M56 Globular Cluster, Saturn and Jupiter. Unfortunately I packed up the binoculars before I remembered Mars was up ! So packed up the car, ands drove very tired 50 minutes home.
