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.
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.
Unusually it was a clear Friday evening. I did plan to be ready to go as soon at the pole star was visible but my imaging PC insisted on updates and the local hard disk was running at 10MB/s (replacement SSD on the way).
By the time I was ready, mount setup, polar aligned and balanced it was already late. I decided not to use the latest SGPro or NINA beta but just use the existing SGPro version. I was delayed starting as I was having issues with SGPro hanging when it couldn’t talk to the SQM (ASCOM Conditions Observing Hub) on a previous COM port, I need to report this back to the devs as a bug.
At this point Peg-Leg Dave joined me on a video call and we discussed imaging M45 in different modes on the QHY268C OSC. So we moved the scope to Alp Ari and proceeded to plate solve in SGPro, sync’d the scope Cartes Du Ciel and calibrated OpenPHD2.
Using the SGPro framing and mosaic wizard to decide on the framing for the target sequence I wanted as much of the reflection nebula as possible rather than being dead center.
I’ve used the multi-star guiding in OpenPHD2 since it was first released in an earlier beta and I know Dave is looking forward to using it when he moves from using an OAG on his 12-inch RC to a 90mm guide scope to make it easier to get more guide stars or even one star.
Whilst trying some mode/exposure tests the guiding started acting up in RA, so parking the mount and disengaging the clutches I redid the balance of the scope. It was only marginally off but it was enough to cause issues for the CEM60 …. it is not forgiving !
We decided to increase the Gain/Offset to 15/75 and use the Extended Full-Well mode (#2) of the QHY268C, testing the star brightness levels of various exposure times we opted for 180 seconds as that was under the maximum brightness level.
As I currently have no IP camera outside I like to see the mount position using GSPoint3D as I like to view where it is especially during meridian flips. NINA has this built-in now in the recent version 2.0 betas. As SGPro lacks this functionality I can use the view via this is standalone version that connects to the ASCOM mount.
SGPro paused the guiding just prior to the meridian flip. Following the automated flip, the guider and the imaging sequence automatically restarted after a plate solve and auto centering were performed.
It gradually got cloudier just after midnight and the quality of the subs declined so I decided to stop acquiring data even though we really wanted over 4 hours of exposure.
I proceeded to take calibration frames. Using a target ADU of ~23,000 the SGPro flat wizard on the Pegasus FlatMaster (100%) gave an exposure time of 9.68s for the Optolong L-Pro filter, 25 flat-frames were taken followed by 25 dark-flat frames of the same exposure time and finally 25 dark frames of 180 seconds.
It was at this point that I realised that the FITs header showed a gain level of 0 and not 15, the offset was correct but I can’t be sure if the EFW mode was used as it’s not in the FITs headers. Only when using the native driver in NINA can you set the mode within the sequence, in SGPro the mode is set in the external ASCOM driver when the camera is not active in SGPro even though though it’s in the ASCOM API as the Camera.ReadoutModes property.
Also for some reason the default setting in the QHY driver is to NOT disable the overscan area which means I have black borders on my images which will make processing the data in Pixinsight a challenge !
I actually got to bed after 3am even though I had planned to stay up until the dawn. Next morning I noticed that my counter-weight had slipped and rotated on the bar. This may have also caused some of the issues with the guiding so I need to set-up earlier and check things more thoroughly in future to avoid these mistakes.
So although it’s not the data we planned it will be worth processing over a wine. The evening was a really a useful experiment and hopefully lessons will be learned …. if I remember the next time.
04:00 – 06:53
Comet C/2021 A1 Leonard. The last day to get this lovely little comet. Dave Boddington had captured a wonderful image yesterday through his 6″ and 4″ refractors. I was was never going to be able to do that with my 5″ refractor due to my broken foot and not being able to move it from the Warm room to the verge on the other side of the lane at the front of my property.
So instead I settled for the good old Canon 6D on a tripod. I had slowly gone up and retrieved the kit the day before in the light and now at 4am set off out the front, crutches in hand, camera on tripod strapped round my neck, in the dark at 1℃.
After getting comfortable standing on the verge, I extended the tripod legs balancing on 1 foot and set the camera on Arcturus to focus at 100mm. I had chosen the 100-300mm lens for maximum flexibility. After achieving focus by hand and by using the zoom function on the camera screen, I placed the camera roughly in the direction of where the comet should appear just below Corona Borealis in the faint constellation of Serpens. This is the shot I got.
I then changed focal length going to 300mm on the zoom lens, switched back to Arcturus to focus and then, after a few attempts, actually some 20 minutes, I managed to get the comet back on the chip. Result!
I packed up the tripod, hung it round my neck and headed slowly and gingerly across the lane and back up the drive to the house. When I had removed my one shoe, cleaned my boot and my crutches I looked at the camera lens and was not surprised to see a lens full of dew 🙄
I then set about opening the dome of the observatory as the comet would have now cleared the tree line. However it would not open 😳 On closer inspection, meaning I went back out in the cold and up the garden, I found the shutter would not operate. Some time spent investigating led me to believe the battery in the shutter box was dead 🥺 so I removed and took back to the house for further investigation later today. That meant no comet photo through the 12″, however I was pleased with my results given the challenge.
20:00 – 21:30
IC5067 Pelican in OIII and SII, rotated to new angle to allow guide star on West side of the mount. 10 x each channel at 600s and Gain 139 Offset 21, left running and dome shut later in the morning.
Rotation angle 218 from SGPro plate solve, 171.750 from TSX
Flats done the following day 3rd Nov.
Flats darks and darks still to be done
21:17 – 00:28
Progress meridian flip tonight. Nearly worked, challenge was I lost the only guide star and then it fixed on hot pixel. I have now made the setting for star recognition min 3 HFD but still not guide star present. I need guide scope……
22:30 – 03:57
Tonight I am at Kelling Heath star party with Shane and Mark Radice. After a fantastic board game with Mark, Shane and Shane’s wife we then headed back to camp and I started to look through there binoculars using the NSOG (????) book as my guide. Whilst I realised I could have got away with bringing the Milkway edition, instead I brought along the Autumn/Winter version.
I had packed my 100mm Altair Astro binos so it was going to a visual night with some rudimentary drawing. I looked around and set my gaze on Pegasus and turned to the pages in the guide to set me off.
First on the list was M15. It appeared relatively close to
m15 – seen
peg 1 – seen
3 peg – seen
53 peg major seen not companion
ngc 7217 – not seen
ngc 7331 – seen with averted vision
ngc 7332 – not seen
ngc 7814 – not seen
M39 seen
M42 seen
veil eastern seen
North American seen
tried UHC filter baader from Mark in 1 eyepiece in binos abs made nebula stand out
bed at 3:52am due to fog and 9deg c
looked at M81 and M82 through Keith’s 18”
could not see horse head
M42 WOW!! and M43 both through 13m Ethos 100 deg and then 21m Ethos
19:21 – 21:00
NGC 6765
Focus 18,406
imaged for 1hour 36 mins and then the safety went off and it stopped imaging, no idea if the dome closed at that point or if it just lost a guide star but that was it, despite it being clear all night. So I need to not set the Boltwood OK to image setting in SGPro and I need to find a way of time stamping the dome closure
20:55-00:11
Kelt 16b
Focus 20,329, taken with Luminance filter rather than red
GAIN 75 OFFSET 12 -25℃
Rotator Angle 29.420
Dome stopped at 582 images so need to see how many good ones I got
Clarity got worse from 1:18am until 3:52am when it clouded over, imaging is no good just before 1:15am so mid transit
| Kelt-16b Observ. Priority: LOW Total obs. (Recent): 35 (5) O-C minutes: 0.6±0.21 | RA/DEC J2000 20:57:04.4386 +31:39:39.629 | MagR mag 11.601 | DepthR mmag 14.77 | Duration hours 2.49 |
| 2021/10/01 22:36 Alt: 65° Azi: 228° (SW) | 1h Before Ingress 2021/10/01 23:36 Alt: 57° Azi: 249° (W) | Transit Start 2021/10/02 00:51 Alt: 45° Azi: 266° (W) | Mid Transit 2021/10/02 02:05 Alt: 34° Azi: 280° (W) | Transit End 2021/10/02 03:05 Alt: 25° Azi: 291° (W) |
| Max counts increase during observation: R:0% V:0% Moon illumination: 22.5%, Moon distance: 126.5° Observing times [ UTC+1.0 ] and target position |
20:46 – 21:39
NGC 6765, second attempt
22:35 – 23:45
Focus position 18464
Temp -25℃
Gain 139 Offset 21
OIII LRGB 20 x each, 600s on OIII and L and then 300s on RGB
Rotation angle 29.420
NGC 6765 planetary nebula in Lyra
Everything up until 23:45 is Luminance as the filter wheel was not connected correctly in SGPro and it thought it was moving but did not…..
Went to bed
Looks like it clouded over around midnight so a few images only. I also now seem to have a mark on the Luminance filter at the bottom which is a pain, not sure how that got there on a closed system. Also the scope must have moved during the imaging as a few of the images are of a different FoV.
21:32 – 06:07
M71 Globular Cluster.
Focus position 14,563
Rotator Position 29.420
Temp -22℃
Gain 75 Offset 12
LRGB started at 22:14
Focuser position on last image 16,636
17:35 – 22:15
Opened dome early to cool down, we then had some cloud and it closed, so reopen around 8pm.
As it has been a very warm day, some 28℃ and is still 20℃s, I will set the camera temp to -20℃ and image a different object to avoid several sets of flats, darks and flat darks. I settled on M56 as I had not imaged this for my Messier catalogue yet.
Loads of problems, mount kept saying it was not unpacked, guider would not connect, so rebooted and all fine.
Imaging at 22:10
Gain 75 Offset 12
Rotation angle 29.420
Temp -22 (need correct Flats/Darks and Dark Flats)
When I rebooted I noticed the PHD2 setting are wrong for the guider so need to change the profile to include DirectGuide not Pulse Guide. Also need to change SGPro so that it does not autofocus at the start of a run, also so it does not set the temp to -15.
Off to bed at 22:15 and left it running.
Everything went well, the dome shut at sunrise and the images look ok, maybe slightly soft focus but only when I process will I be able to tell.
21:19 – xx:xx
Palomar 10
Angle 139.520
LRGB taken, the first set were fine then the dome closed but SGPro kept on imaging as I forgot to set the safety, so I will need to dispose of a number of images.
22:00 – xx:xx
Quick look at the Bat nebula given there is a break in the clouds. I had trouble with a guide star due to as hot pixel so I had to move the scope slightly to move the guide star. I need to take a some new darks for the off axis guider.
I tried 2 regions within the Bat nebula given its size, but neither showed any signs of nebula on a single 10min exposure.
I then tried Lynds Dark Nebula, LDN 1082 The Seahorse. |However again due to the expanse of this object a small portion was only available in the 12″ so again this will be more suited to the Esprit.
I then went for Palomar 10, a Globular cluster in Sagtta.
22:14 – 00:52
RGB on SH2 – 132.
RGB focus 19,098, Temp -25℃ GAIN 139 OFFSET 21 , Rotator angle 256.020
Changed rotator angle to find guide star, must remember to force a calibration within PHD2 straight after so that the guiding works.
@ 00:45 LRGB on M15.
Lum focus 20,098, RGB focus 19,098, Temp -25℃ GAIN 139 OFFSET 21, Rotator angle 139.520
Left the observatory running at 00:52 and went to bed.
Forgot to set the Very Light safety limit so dome did not close when the Sun came up……
Need to do flats!!
22:00 – 04:00
After a long day of building the new astronomy building with a few friends, I opened the dome on this clear night and start off by imaging SH2 132 until midnight for which I grabbed 18 x 600s Ha images at Gain 139 Offset 21 and temp of -25℃. I then switched to SH2 183 and went to bed.
On waking this morning I realised I got 22 x 600s Ha images at Gain 139 Offset 21 and temp -25℃ before the clouds rolled in ands the dome shut around 4am. The seeing was particularly good as can be seen from the satellite image from skippy sky.com
19:32 – 22:54
Opened dome.
Grafana dashboard was not reporting anything from AAG, this turned out to be a bug in the code from Gingergeek which he will fix. First image from the camera came out blank from SGPro, restarted a new image and problem went away. Started imaging SH2 132 but clouds rolled in.
Dome closed
21:22 – 03:50
Another clear night whilst I am on holiday and after a long day of building the new warm room for my astronomy hobby. I finally got the camera imaging some more 600s Ha frames of the Sharpless 132 emission nebula in Cepheus (11 subs). The challenge was SGPro misbehaving and not plate solving. I used Gingergeek to look at it but he could not work out the problem either. So I used TSX to slew and solve instead before heading back into SGPro to start capturing data. I ran a set of Ha Flats before I moved to the next object at Rotator Angle 256.020, focus position 18500.
I then moved to SH2 183 another emission nebula in Cepheus. I let this running for the rest of the night whilst I went to bed at 00:47 during which time it took 19 images until more cloud lost the guide star which I need to fix so it restarts automatically.
I also worked out that plate solving was an SGPro bug as restarting SGPro allowed the plate solving to start working again, so useful for next time.
Observing conditions check. This morning I reviewed the environmental data and the conditions were fairly poor so I will redo the data. The Moon was just past full. The ASC video shows wispy cloud all night. The sky temperature was bumping around -13-14 degrees all night where -18 degrees is considered clear.
So I had planned to sit in on the Exoclock Annual meeting all day for both days but in the end I could only attend for the pre-lunch meetings as I had promised Dave that I would assist at the IMT3b observatory. So I will catch up on the afternoon talks when they are made available online.
The talks were varied and included experts from the Ariel Mission, Twinkle Mission, JPL, Telescope Live, BAA , members of the Exoclock project followed by workshops of which again I really wanted to be present to participate in the CMOS workshop but I couldn’t.
We shutdown the dome computers, network and whilst Bob started on the warm room electrics Dave and I proceeded to 1 ton of scalpings from the front of the house into wheelbarrows and then push them up the garden to be stored ready for the warm room patio construction. It was a very humid day and we were both sweating heavily by the end of it.
The dome computers were repowered and outstanding software updates applied (BIOS, Windows updates, windows software and RPi4 OS & software) before the Autumn imaging sessions begin in earnest.
The day was rounded off by relaxing with a glass of red wine and dinner with Bob, Dave and the family. As the evening turned out to be cloudy there would be no imaging so it was an early night ready for the hard graft on the following afternoon.
Another set of fine talks and I especially thought it was a nice touch that an artist Lea who won the new Exoclock Logo Competition was awarded some imaging time on Telescope Live.
Lea took a bit a time explaining her background and how she formulated the design for the new logo.
It was even better that not being an astronomer she was persuaded to undertake some Exoplanet observations and report on her experience.
The 7ft double glazed windows were put by Dave, Luke and Tim and myself. It was nerve racking as we manhandled the two panes from near the side of the main house up steps and along the garden with the Tim and Luke taking the awkward window corners whilst Dave and I used floor tile clamps on the glass.
Bob came over to complete the electrics for the warm room and I left when Dave started stretching on tiptoes to put in the red & white light fittings. I figured I could complete the remaining software updates remotely.
The AAG software was updated to 9.1.4 from the old 8.1.0 version, we still need to investigate the wind sensor reading with Jamie from AAG.
So we now access to the Humidity sensor settings and the appropriate alert levels. Previously I had to rely on both ASCOM local conditions and internal dome humidity via ASCOM (BlueAstro StickStation) but I wonder if we want to trigger an unsafe state by including the humidity thresholds.
21:00 – 02:38
With a near on full Moon, the choices for deep sky were limited so I set about looking for Sharpless emission nebula. First on my list was SH2 136 in Cepheus. I slewed, aligned, selected the Ha filter, rotated the camera to find a guide star, tried to run autofocus which failed (I set the focus point to 18500 for Ha manually) and then imaged a few subs at 600s, which is when I realised the problem.
Nothing but stars….. I googled around and it transpires that some fo the Sharpless catalogue is emission and the rest is reflection! Now I know this useful fact I will double check each image I go after.
Before I moved on I took a single 300s luminance frame just to see if I could see anything at all. The answer was not a lot, so I moved on. This time I choose an emission nebula, much larger than my FoV but still it should be a pleasing object, SH2 132, an emission nebula also in Cepheus.
I set about imaging 14 x 600s in Ha and then went to bed at 23:48 leaving the system running for another 2 hours before hitting the meridian, as I have not setup the scope to flip yet.
At 02:38 I woke and shut the dome.
