David's Astronomy Pages Notes - Session 853 (2021-01-22)

Notes (S852)

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Notes (S854)

	Session Aims & Highlights
	- Observing Result  - Night Summary Plot  - Session Event Log
	Operational Issues
	- Critical Issues (0),  Major Issues (0),  Minor Issues (11),  Continuous Improvement (3)
	Images from 2021-01-22 >>

Session Aims & Highlights (2021-01-22)

Main aims

1. Software. Test features and fixes added in AstroMain 3.35
2. Targets. Acquire images of a selection of variable stars, nearby stars, comets and deep sky targets as allowed by conditions.

Equipment & Software

• 12" LX200 and ST-10XME
• 80mm APO and ZWO ASI 178MC
• CCDApp2, TheSky6, CCDSoft5, PHD2,  DeviceHub 6.5.1.0,  UPB 1.5, ASCOM 6.5 SP1
• Pegasus UPB & Motor Focus, TCF-S
• SharpCap 3.2, PHD2  2.6.9Dev3
   
• AstroMain 3.35  AstroGuard 1.4.6,   AstroPlan 1.20.1, AstroShCap 1.3.8, AstroVOE 1.5.2, AstroSN 1.4,  AstroProtect 1.4.1
  (AstroWeather 1.10.14, AstroAllSky 3.6.2 & 3.6.3)

Highlights

• Autostart.  Autostart worked perfectly , automated opening of the observatory and start of session at 01:06 when skies were detected to have cleared.  Apart from initiating AutoStart at 23:56 the whole session ran in an entirely automated unattended mode.
• Targets.  x Targets successfully acquired
• Centering.  Targets centering was very good
• Autoguiding.  Autoguiding performance was good

Summary Plots & Logs

Observing Plan

Observing Result

Dome & Scope Slewing Performance

Slew/Centering Performance

Guiding Performance

Sky Conditions (Locate Frames) Data for second part of night is erronous as Observatory shutter was unknowingly closed

Chart unavailable for this session

Night Sky Summary Plot Top axis: Sky Brightness at Zenith (in ADU/s) Lefthand axis: Local Time (hh LT). Righthand axis: Sun Altitude (degs)

Pre-Session Weather Forecast (API data from darksky.net) Pre-Session Weather forecast showed overcast conditions (cloud cover 100%) with possibility of light rain showers in first part of night, giving way to clear stars from 02:00 onwards (cloud cover 25-39%) with very low probability of light showers. Temperatures 5°C falling to 3°C by dawn.. Moderate Wind (13-16 mph) Observatory was set in AutoStart mode, so that session would begin would automatically commence when sky conditions became suitable for observing.   In the event skies were overcast until 01:00 (with rain at 00:45) and then remained clear until dawn except for a passing cloud with spots of rain at 02:55 Temperature of 4°C at 01:00 fell to 1°C by dawn. Winds light to moderate.

Session Event Log

Time     Event Detail 17:23:53 Session Monitoring AutoStart monitoring for Live Session opportunity starting between 17:23 & 06:21 17:23:56   AutoStart Delayed Session delayed due to cloud 17:37:57 Session AutoStarting Session autostarting (17:37) 17:38:27 Session Created Live Session Created (2021-01-22 S00853, ImageSaveNum: 853001) 17:38:29   Scope Switched On Telescope Power has been switched on via UPB Powerbox. 17:40:27   Services Started Observatory Services started 17:40:36 Observatory (Auto) Observatory placed in Fully-Automated Mode 17:40:37 Session Pending Session pending (2021-01-22) 17:40:39 Session Initiating Session initiating (2021-01-22) 17:40:41   Plan Requested Observing Plan requested from AstroPlan (1.20.1) 17:41:13   Plan Loaded Observing Plan loaded to queue (2021-01-22 V1 BEST PLAN, Plan ID: 588) 17:41:25   Camera1 Connected SBIG Camera Connected (set point -25°C) 17:41:30   Telescope Connected Telescope Connected (TheSky6) 17:41:41 Session Equilibration Session ready for dome & camera equilibration 17:43:22   Dome Opened Dome opened (opening time 45s) 17:43:38   Equilibration Started Dome Equilibration started 17:48:38   Equilibration Ended Dome Equilibration ended (5.0 mins total) 17:48:40 Session Running Session running 17:48:42   Queue Started Observing Queue started (48 targets selected) 17:49:51       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 17:52:32       Focusing Completed Foc1 AutoFocus Completed (Profile No 1) 17:54:23       Focusing Completed Foc1 AutoFocus Completed (Profile No 1) 17:54:25       Focusing Started-Foc2 Foc2 Focusing Started (Secondary Scope, using ShCap) 17:56:39       Focusing Completed Foc2 AutoFocus Completed (Profile No 2, wide) 17:58:26       Focusing Completed Foc2 AutoFocus Completed (Profile No 2) 17:58:42       Focusing Checked Foc2 Focusing Check Succeeded 18:00:37     Target Started (1/48) Target started (1/48, WDS GRB 34) 18:04:38       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 18:06:29       Focusing Completed Foc1 AutoFocus Completed (Profile No 3) 18:09:32     Target Completed Target completed (1/48, WDS GRB 34) 18:09:34     Target Started (2/48) Target started (2/48, SN 2021xn) 18:14:45       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 18:16:56       Focusing Completed Foc1 AutoFocus Completed (Profile No 4) 18:33:02     Target Completed Target completed (2/48, SN 2021xn) 18:33:04     Target Started (3/48) Target started (3/48, GCVS DY Per) 18:38:28       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 18:40:25       Focusing Completed Foc1 AutoFocus Completed (Profile No 5) 18:45:21     Target Completed Target completed (3/48, GCVS DY Per) 18:45:24     Target Started (4/48) Target started (4/48, GCVS RX And) 18:48:18       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 18:50:07       Focusing Completed Foc1 AutoFocus Completed (Profile No 6) 18:53:20     Target Completed Target completed (4/48, GCVS RX And) 18:53:22     Target Started (5/48) Target started (5/48, UGC 784 w/SN2021pc) 18:57:24       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 18:59:36       Focusing Completed Foc1 AutoFocus Completed (Profile No 7) 19:16:07     Target Completed Target completed (5/48, UGC 784 w/SN2021pc) 19:16:10     Target Started (6/48) Target started (6/48, AT2021apb) 19:18:55       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 19:20:45       Focusing Completed Foc1 AutoFocus Completed (Profile No 8) 19:26:46     Target Completed Target completed (6/48, AT2021apb) 19:26:49     Target Started (7/48) Target started (7/48, GCVS U And) 19:29:54       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 19:31:36       Focusing Completed Foc1 AutoFocus Completed (Profile No 9) 19:42:28     Target Completed Target completed (7/48, GCVS U And) 19:42:30     Target Started (8/48) Target started (8/48, AT2021avk) 19:45:16       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 19:47:18       Focusing Completed Foc1 AutoFocus Completed (Profile No 10) 19:53:20     Target Completed Target completed (8/48, AT2021avk) 19:53:23     Target Started (9/48) Target started (9/48, 398P/Boattini) 19:57:19       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 19:59:22       Focusing Completed Foc1 AutoFocus Completed (Profile No 11) 20:08:54     Target Completed Target completed (9/48, 398P/Boattini) 20:08:56     Target Started (10/48) Target started (10/48, GCVS RR Tau) 20:12:12       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 20:14:36       Focusing Completed Foc1 AutoFocus Completed (Profile No 12) 20:20:54     Target Completed Target partially completed (10/48, GCVS RR Tau) 20:20:56     Target Started (11/48) Target started (11/48, GCVS GK Per) 20:23:38       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 20:25:30       Focusing Completed Foc1 AutoFocus Completed (Profile No 13) 20:29:04     Target Completed Target completed (11/48, GCVS GK Per) 20:29:06     Target Started (12/48) Target started (12/48, Nova Per 2020 w/AT2020abap) 20:31:43       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 20:33:36       Focusing Completed Foc1 AutoFocus Completed (Profile No 14) 20:42:22     Target Completed Target completed (12/48, Nova Per 2020 w/AT2020abap) 20:42:24     Target Started (13/48) Target started (13/48, C/2020 M3 (Atlas)) 20:45:26       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 20:47:26       Focusing Completed Foc1 AutoFocus Completed (Profile No 15) 20:54:56     Target Completed Target completed (13/48, C/2020 M3 (Atlas)) 20:54:58     Target Started (14/48) Target started (14/48, 156P/Russell-LINEAR) 20:59:21       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 21:01:25       Focusing Completed Foc1 AutoFocus Completed (Profile No 16) 21:09:19     Target Completed Target partially completed (14/48, 156P/Russell-LINEAR) 21:09:21     Target Started (15/48) Target started (15/48, NGC 684 w/SN2021ass) 21:12:14       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 21:14:16       Focusing Completed Foc1 AutoFocus Completed (Profile No 17) 21:30:43     Target Completed Target completed (15/48, NGC 684 w/SN2021ass) 21:30:45     Target Started (16/48) Target started (16/48, GCVS TT Ari) 21:34:34       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 21:36:45       Focusing Completed Foc1 AutoFocus Completed (Profile No 18) 21:43:31     Target Completed Target completed (16/48, GCVS TT Ari) 21:43:33     Target Started (17/48) Target started (17/48, GCVS NV Ori) 21:46:41       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 21:48:20       Focusing Completed Foc1 AutoFocus Completed (Profile No 19) 21:52:41     Target Completed Target completed (17/48, GCVS NV Ori) 21:52:43     Target Started (18/48) Target started (18/48, NGC 2782 w/SN2020scc) 21:55:42       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 21:57:44       Focusing Completed Foc1 AutoFocus Completed (Profile No 20) 22:13:55     Target Completed Target completed (18/48, NGC 2782 w/SN2020scc) 22:13:58     Target Started (19/48) Target started (19/48, UGC 4134) 22:19:02       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S) 22:36:49     Target Completed Target completed (19/48, UGC 4134) 22:36:51     Target Started (20/48) Target started (20/48, GCVS ER UMa) 22:40:49       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 22:42:51       Focusing Completed Foc1 AutoFocus Completed (Profile No 21) 22:46:36     Target Completed Target completed (20/48, GCVS ER UMa) 22:46:39     Target Started (21/48) Target started (21/48, UGCA 290) 22:49:41       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 22:51:22       Focusing Completed Foc1 AutoFocus Completed (Profile No 22) 23:07:47     Target Completed Target completed (21/48, UGCA 290) 23:07:50     Target Started (22/48) Target started (22/48, UGCA 239) 23:11:52       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 23:13:54       Focusing Completed Foc1 AutoFocus Completed (Profile No 23) 23:30:28     Target Completed Target completed (22/48, UGCA 239) 23:30:30     Target Started (23/48) Target started (23/48, AT2021acn) 23:34:13       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 23:36:12       Focusing Completed Foc1 AutoFocus Completed (Profile No 24) 23:52:54     Target Completed Target completed (23/48, AT2021acn) 23:52:56     Target Started (24/48) Target started (24/48, NGC 2377) 23:57:00       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 23:59:05       Focusing Completed Foc1 AutoFocus Completed (Profile No 25) 00:15:31     Target Completed Target completed (24/48, NGC 2377) 00:15:33     Target Started (25/48) Target started (25/48, Scholz's Star) 00:19:04       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 00:21:18       Focusing Completed Foc1 AutoFocus Completed (Profile No 26) 00:37:14     Target Completed Target completed (25/48, Scholz's Star) 00:37:16     Target Started (26/48) Target started (26/48, GCVS U Mon) 00:41:05       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 00:42:43       Focusing Completed Foc1 AutoFocus Completed (Profile No 27) 00:49:09     Target Completed Target completed (26/48, GCVS U Mon) 00:49:11     Target Started (27/48) Target started (27/48, GCVS DX Cnc) 00:55:13   SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (too few stars) 01:00:06     Target Completed Target partially completed (27/48, GCVS DX Cnc) 01:00:08   Queue Paused Queue paused for Session Suspension 01:00:10 Session Suspended Session suspended 01:00:58   Dome Closed Dome closed (closing time 50s) 01:14:33     Target Cancelled Target cancelled (28/48, KUG 0830+278 w/SN2020adow) due to cloud 01:26:27     Target Cancelled Target cancelled (29/48, GCVS SY Cnc) due to cloud 01:36:38     Target Cancelled Target cancelled (30/48, LAMOST-HVS1) due to cloud 01:47:16     Target Cancelled Target cancelled (31/48, GCVS RZ LMi) due to cloud 02:08:08     Target Cancelled Target cancelled (32/48, AT2021rl) due to cloud 02:22:00     Target Cancelled Target cancelled (33/48, AT2021azh) due to other condition 02:35:12 Session Resuming Session resuming 02:35:57   Dome Opened Dome opened (opening time 45s) 02:35:59 Session Running Session running 02:36:01     Target Started (34/48) Target started (34/48, UGC 5760 w/SN2020zoq) 02:36:03   Queue Resumed Observing Queue resumed 02:48:35     Target Completed Target partially completed (34/48, UGC 5760 w/SN2020zoq) 02:48:37     Target Started (35/48) Target started (35/48, UGC 6930 w/SN2020rcq) 02:51:47       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 02:53:51       Focusing Completed Foc1 AutoFocus Completed (Profile No 28) 03:05:25     Target Completed Target completed (35/48, UGC 6930 w/SN2020rcq) 03:05:27     Target Started (36/48) Target started (36/48, GCVS CN Leo) 03:09:41       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 03:11:43       Focusing Completed Foc1 AutoFocus Completed (Profile No 29) 03:20:59     Target Completed Target partially completed (36/48, GCVS CN Leo) 03:21:01     Target Started (37/48) Target started (37/48, GCVS AM CVn) 03:23:56       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 03:25:39       Focusing Completed Foc1 AutoFocus Completed (Profile No 30) 03:28:40     Target Completed Target completed (37/48, GCVS AM CVn) 03:28:42     Target Started (38/48) Target started (38/48, UGCA 304) 03:31:50       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 03:33:50       Focusing Completed Foc1 AutoFocus Completed (Profile No 31) 03:49:57     Target Completed Target completed (38/48, UGCA 304) 03:49:59     Target Started (39/48) Target started (39/48, IC 2834) 03:52:57       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 03:54:58       Focusing Completed Foc1 AutoFocus Completed (Profile No 32) 04:11:22     Target Completed Target completed (39/48, IC 2834) 04:11:24     Target Started (40/48) Target started (40/48, KUG 1206+328 w/SN2020aeps) 04:16:20       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S) 04:29:01     Target Completed Target completed (40/48, KUG 1206+328 w/SN2020aeps) 04:29:03     Target Started (41/48) Target started (41/48, NGC 4414 w/SN2021J) 04:32:01       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S) 04:50:11     Target Completed Target completed (41/48, NGC 4414 w/SN2021J) 04:50:13     Target Started (42/48) Target started (42/48, NGC 4897) 04:54:23       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S) 05:12:08     Target Completed Target completed (42/48, NGC 4897) 05:12:19     Target Started (43/48) Target started (43/48, NGC 5331 w/SN2020abir) 05:15:55       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 05:17:55       Focusing Completed Foc1 AutoFocus Completed (Profile No 33) 05:34:03     Target Completed Target completed (43/48, NGC 5331 w/SN2020abir) 05:34:41     Target Started (44/48) Target started (44/48, NGC 4454 w/SN2020abgq) 05:38:41       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 05:40:35       Focusing Completed Foc1 AutoFocus Completed (Profile No 34) 05:57:08     Target Completed Target completed (44/48, NGC 4454 w/SN2020abgq) 05:57:11     Target Started (45/48) Target started (45/48, PGC 49584) 06:00:20       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 06:02:37       Focusing Completed Foc1 AutoFocus Completed (Profile No 35) 06:18:46     Target Completed Target completed (45/48, PGC 49584) 06:19:25     Target Started (46/48) Target started (46/48, GCVS SS Her) 06:23:48       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 06:25:49       Focusing Completed Foc1 AutoFocus Completed (Profile No 36) 06:29:34     Target Completed Target completed (46/48, GCVS SS Her) 06:29:36     Target Started (47/48) Target started (47/48, HIP 87937) 06:33:21       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 06:35:11       Focusing Completed Foc1 AutoFocus Completed (Profile No 37) 06:39:11     Target Completed Target completed (47/48, HIP 87937) 06:39:13     Target Started (48/48) Target started (48/48, GCVS AM Her) 06:42:05       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 06:43:54       Focusing Completed Foc1 AutoFocus Completed (Profile No 38) 06:49:19     Target Completed Target completed (48/48, GCVS AM Her) 06:49:22   Queue Completed Job Queue completed 06:49:26 Session Closing Session closing 06:50:21   Dome Closed Dome closed (closing time 50s) 06:53:29   Dome Parked Dome parked (parking time 181s), Az: 90.0 deg 06:54:10   Telescope Parked Telescope parked (parking time 37s) 06:54:40   Telescope Switched Off Telescope Power has been switched off via UPB Switch. 06:55:28   Services Stopped Night Services stopped 06:55:30 Session Housekeeping Housekeeping Started (Cleanup FITS, Create Fits Summary, Transfer Files) 06:56:01 Session Finished Session Finished

Session Alerts

Time     Alert Detail 18:11:04 Dome Discrepency Difference between Telescope Az and Dome Az is > 8 deg (SN 2021xn) 19:43:30 Dome Discrepency Difference between Telescope Az and Dome Az is > 8 deg (AT2021avk) 22:15:22 Dome Discrepency Difference between Telescope Az and Dome Az is > 8 deg (UGC 4134)

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Operational Issues (2021-01-22 S853)

• Critical Issues (0)
• Major Issues (0)
• Minor Issues (11)
• Continuous Improvement (3)

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Critical Issues

• None

Major Issues

• None

Minor Issues

• Circle isn't drawn around WDS GRB 34 on target's JPG pictures.  RetrieveTarget () was changed in AstroMain 3.35 to set PositionErrorRadius = 0.5 for selected ProjectID's including ProgramID = 11 (' Nearby Stars').   Bug fixed in AstroMain 3.35.1 (line intended to set PositionErrorRadius = 0.5 had been accidenttly left out !)
  Fixed (AstroMain 3.35.1) 
   
• txtNextRain field is still being shown with Salmon (red) background when probability of rain is very small.   Modification in AstroMain 3.35 hasn't worked.  Bug Fixed in AstroMain 3.35.1 (code modified to use correct variable (NextRain instead of NextRainHours),
  Fixed (AstroMain 3.35.1) 
   
• Pasting Reduced Folder Analysis result into session Fits_Summary, added an Image Picture instead of expected text. Feature added in AstroMain 3.35 so that the results of reduced folder analysis ( '358/386 images successfully linked (92.7%)' ) would be copied to clipboard in order to reduce number of steps performed by the user.  However upon pasting the clipboard contents to .xls the  image picture from the last analysed image was copied instead.   So either the new code line (Clipboard.SetText (string) ) isn't been executed or otherwise fails.  or it requires a preceeding delay or the use of a preceeding Clipboard.Clear.  Clipboard contents can be queried Clipboard.ContainsImage, Clipboard.ContainsText. as a check ? .
  Fix attempted 2021-01-23 (AstroMain 3.35.1) 
   
• Guide Reference JPG Pictures aren't being shown on Current Session web page. The Guide reference pictures are being created in JPGS and JPGS_sm folders ok, so it is presumed that the pictures aren't getting transferred to live folder as they should. Examining the last 10 ImageFrames in the Live folder shows GCVS AM Her's Loc2 image in the ImageFrame03 position, with Guide Frame in ImageFrame05 position, and Focus Frame in ImageFrame06 position with Main Images in positions ImageFrame07 - 10 and ImageFrame01 to 02.  With this sequence ImageFrame04 position should contain Guide Reference image but instead it contains an older SS Her Image.   So the Guide Reference picture is being created ok and the ImageFrameNo is being incremented ok, but the associated file copy to Live Folder is either not happening or is failing. SaveGuideImageToJpg() calls ConvertFitsToJpg() with SaveType=5. and there are no call differences between Guide Reference and the Guide Frame and nor any material differences between the 2 Jpg's produced.  There is nothing to explain why the copy would inherently fail
  Copy wouldn't occur if  bWriteDest2Image hadn't been set to true, but this is unlikely from code or something else, like a second call to routine,   caused bWriteDest2Image to be set to false,  or the "ConvertFitsToJpg.bat" was overwritten before it executed.   This seems the likely explaination. Fixed attempt by moving the min 5s delay between calls to Bat execution to be moved before the code that writes to the batch file.   This issue happens because calls to SaveGuideImageToJpg are to Guide Reference and Guide Frame are made quite quickly after each other. A second fix has been made to add a delay before calling SaveGuideImageToJpg with the the GuideFrame.
  Fix attempted 2021-01-23 (AstroMain 3.35.1) 
   
• Slew/Centering chart, showed two points for SN 201xn target on 'Pointing Error after slew' plot. One point for slew (Loc1, Error 23.1') and one point for first centering jog (Loc2, Error 19.8').  The graph should only plot the first point derived from a successful link (Loc1 in this case). Points are added by calls to CChart.AddSlewPoint() routine. There is only one place (in OB.CenterTarget routine) that these calls are made from.  Calls are conditional on bSlewPointRecorded = False,  so if the variable isn't set to true after first locate from analysis (Loc1), the call will be made after the second locate frame.   Code shows that bSlewPointRecorded = True is only set when PointingError_mins < 20.   As Pointing Error was 23.1' after first locate analysis the behaviour (2 points plotted) can be explained.  Investigated showed a bug in code whereby when Pointing Error > 20 then SlewAdjustments where still including the 'bad slew'.  Code modified to fix this bug and to fix the issue that 2 points where being shown.
  Fixed 2021-01-23 (AstroMain 3.35.1) 
     
• A 6s delay is being added before calling each and every call to Batch File to Convert FitsToJpg .  Bug fixed (nSecs had been accidently defined as type boolean, instead of type double).  This bug may have also contributed to issue that GuideReference file wasn't getting copied to Live Folder.
  Fixed 2021-01-23 (AstroMain 3.35.1) 
   
• Query: Target 2 (SN 2021xn) had slew/jog issues. Pointing Error after slew 23.1' (Loc1). Pointing Error after first centering jog 19.8' (Loc 2),   Pointing occur after final center operations (0.6', Loc 4). No clear reason,  it seems to be a rogue jog that wasn't picked up and self-corrected.
  Given this isn't common and was corrected after the 3rd Locate frame the issue is closed.
  Closed 2021-01-25 (Session) 
   
• Query: Target 3 (GCVS DY Per) had jog issues.  Pointing Error after slew & centering operations were 1.77' (Loc1) , 1.61' (Loc2), 1.40' (Loc3), 3.57'  (Loc4) . Also Guide Frames appear devoid of stars (TS80 occluded by roof ?). Target was positioned very close to Zenith.  No clear reason,  it might be a particular issue being able to make effective jogs when pointing at zenith.  Given this isn't common the issue is closed for timing being.
  Closed 2021-01-25 (Session)  but monitor for future cases.
   
• JPG Pictures aren't being created for the Focus AutoPick the Frame for Near Zenith Focus Field.   Problem repeated in following session at well (S854).
  Resolved S855 (AstroMain 3.35.2) 
   
• 5 x 180s frames for Target SN_2021xn didn't achieve successful image link during Image Reduction/Analysis stage.  Problem has been seen before if the image contains 'too many' stars.  Locate frames link ok.   Increasing Detection Threshold can reduce the number of star inventory objects and allow the image to match. Need to work out a way of automating the use of a different Source Extraction parameters (this is not suitable in cases where one is trying to get data on a faint object, as it is less likely to appear in the Image's Star Inventory). Fix attempted in AstroMain 3.45.2 by autoadjusting Sextractor's detect threshold to 60 (for >400 stars), or to 30 (for > 250-400 stars), instead of nornally used threshold value of 8 , works for some targets (eg AT 2021zkf in session S928, 2021-10-25) but not for DU 1 (S912).  Fix worked for SN 2021xn (S853) 4  of 5 frames linked with GSC (but not UCA/USNO) and the 5th linked with ASTAP , so 100% now link.
   Fixed 2021-10-26 (AstroMain 3.45.2)
   
• Guide Frames for Target 3 (GCVS DY Per) were devoid of stars / guiding failed.  Guide Ref Frame and first guide frame appear devoid of stars. Guiding Chart shows loss/absence of guide star.  Target was positioned very close to Zenith. (alt 98.8d) and it would seem that the TS80 scope's view of the sky was occluded by the roof.  Maybe AstroPlan should invalidate targets with such high altitude, in order to obtain a place target at a slightly better time?. Maybe the Guide Reference frame should be analysed and guiding cancelled if there are no reliable stars.  Underlying issueesolved in AstroPlan 1.29.15 (2022-04-24) by not allowing targets to be entered into the observing plan at times were the target altitude is > 84°.
  Fixed  2022-04-24 (AstroPlan 1.29.15) 

Continuous Improvement

• Modify name of JPG pictures to "0001.853001.TargetName.Loc1.jpg" or similar.  Modify name format from the interim format used in AstroMaim 3.35 which was like 0001.853001_Loc01.TargetName.jpg or similar
  Done 2021-01-23 (AstroMain 3.35.1) 
   
• Query: Can Object Size be reliably acquired from TheSky information lookup ?
  By testing it was found to be relatively easy to access Object Size and Orientation (Position Angle) established e.g.
  
     NGC 522 (Size: 2.8 x 0.5, Position angle: 32°00')
    skObjInfoProp_MAJ_AXIS_MINS (60)   gives 2.8
    skObjInfoProp_MIN_AXIS_MINS (61)   gives 0.5
    skObjInfoProp_PA (64)              gives 32
  After establishing this a new function GetObjectSize() was added to AstroPlan 1.20.2 and AstroMain 3.35.2.
  Done 2021-01-24 (AstroPlan 1.20.2, AstroMain 3.35.2, TheSky6) 
   
• Use new T.TargetDisplayName variable more widely.  Use it for txtCurrentObject and on ObsViewer. Can be solved by setting szTargetName to T.TargetDisplayName , but still reviewing the wider implication of making this assignment.
  Done 2021-01-25 (AstroMain 3.35.2) 

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