David's Astronomy Pages
Notes - Session 1404 (2026-03-09)

 
Bullet Session Aims & Highlights
 - Observing Result
 - Night Summary Plot
 - Session Event Log
Bullet Operational Issues
- Critical Issues (0),  Major Issues (0),  Minor Issues (1),  Small Defects (5),  Continuous Improvement (9)
- Figures (1)
   
Bullet Images from 2026-03-09  >>           
   
2026-03-11
Bullet Siril 1.4.1
   
   

Session Aims & Highlights (2026-03-09)

Main aims

  1. Targets.  Acquire images of a selection of variable stars, nearby stars, comets & deep sky targets as allowed by sky conditions.
  2. ShCap Imaging/Processing.   Continue testing of AstroMain/AstroShCap routines and workflow including Siril scripts

 Equipment & Software

Highlights

Notes

Summary Plots & Logs

Observing Plan
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Observing Result
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Dome & Scope Slewing Performance
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Slew/Centering Performance
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Guiding Performance
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Sky Conditions (Locate Frames)
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Night Sky Summary Plot
Top axis: Sky Brightness at Zenith (in ADU/s)
Lefthand axis: Local Time (hh LT). Righthand axis: Sun Altitude (degs)
Note:  The NorthCam Star Count line is unreliable and should be ignored
(The AstroNorthCam 'Find' Star method is producing many false positives from clouds)
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Actual Weather vs Pre-Session Weather Forecast
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Session Event Log
Time     Event Detail
19:41:37 Session Monitoring AutoStart monitoring for Live Session opportunity between 19:41 & 04:52
19:41:41   AutoStart Delayed Session delayed due to recent rain
19:48:02 Session AutoStarting Session autostarting (19:48)
19:48:08 Session Created Session Created (Live, 2026-03-09 S01404)
19:48:11   CCDSoft Restarting CCDSoft being restarted (to set AutoSave No.)
19:48:30   Scope Switched On Telescope Power has been switched on via UPB Switch
19:50:21   Services Started Observatory Services started
19:50:30 Observatory (Auto) Observatory placed in Fully-Automated Mode
19:50:32   AutoStart Delayed Session delayed due to recent rain
19:50:34 Session Pending Session pending (2026-03-09)
19:50:36 Session Initiating Session initiating (2026-03-09)
19:50:56   Camera1 Connected SBIG Camera connected (Set point -15°C)
19:50:59   Plan Requested Observing Plan requested from AstroPlan (1.46.2)
19:51:27   Plan Loaded Observing Plan loaded to queue (PlanID: 1202)
19:52:11   Telescope Connected Telescope connected (TheSky6)
19:52:36 Session Equilibration Session ready to Open Dome
19:53:22   Dome Opened Dome opened (Opening time 45s, Zigbee 40s)
19:54:01 Session Running Session running
19:54:04   Queue Started Observing Queue started (30 targets selected)
19:54:11     Target Started (NrZen) Target started (Focus Field 7, HIP 34070)
19:54:25       Dome Unparked Dome unparked
19:57:44       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
20:00:15       Focusing Completed Foc1 AutoFocus Completed (Profile No 1, wide)
20:02:19       Focusing Completed Foc1 AutoFocus Completed (Profile No 1)
20:02:22       Focusing Started-Foc2 Foc2 Focusing Started (Secondary Scope, using ShCap)
20:04:20       Focusing Completed Foc2 AutoFocus Completed (Profile No 2, wide)
20:06:02       Focusing Completed Foc2 AutoFocus Completed (Profile No 2)
20:06:22     Target Completed (NrZen) Target completed (Focus Field 7, HIP 34070)
20:07:27     Target Started (1/30) Target started (1/30, Berkeley 69). Using SharpCap
20:12:11       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
20:14:18       Focusing Completed Foc1 AutoFocus Completed (Profile No 3)
20:23:26       Camera1 Connected SBIG Camera connected (Set point -15°C)
20:23:29     Target Completed Target completed (1/30, Berkeley 69)
20:23:31     Target Started (2/30) Target started (2/30, GCVS GW Ori)
20:26:16   Telescope Slew Telescope slew has timed out after 2.5 minutes
20:43:18     Target Completed Target completed (2/30, GCVS GW Ori)
20:43:22     Target Started (3/30) Target started (3/30, Berkeley 71). Using SharpCap
20:45:52       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
20:48:15       Focusing Completed Foc1 AutoFocus Completed (Profile No 4)
20:55:37   Critical Cloud Alert Critical Cloud Alert (Obs.Manager will close the Dome)
20:55:39   HardSuspend Called Hard Suspend called due to Critical Conditions (cloud)
20:56:07       Camera1 Connected SBIG Camera connected (Set point -15°C)
20:56:09     Target Aborted (3/30) Target aborted (3/30, Berkeley 71) due to cloud
20:56:11   Queue Paused Queue paused for Session Suspension
20:56:13 Session Suspending Session suspending
20:57:02   Dome Closed Dome closed (Closing time 50s, Zigbee 43s)
20:57:05 Session Suspended Session suspended
20:59:39     Target Cancelled Target cancelled (3/30, Berkeley 71) due to cloud
21:19:49     Target Cancelled Target cancelled (4/30, M37) due to cloud
21:39:20     Target Cancelled Target cancelled (5/30, AT2026evo (CV)) due to cloud
21:56:59     Target Cancelled Target cancelled (6/30, Berkeley 17) due to cloud
22:11:49     Target Cancelled Target cancelled (7/30, Berkeley 19) due to cloud
22:31:19     Target Cancelled Target cancelled (8/30, AT2026eva) due to cloud
22:48:59     Target Cancelled Target cancelled (9/30, Berkeley 76) due to cloud
23:02:02 Session Resuming Session resuming
23:02:47   Dome Opened Dome opened (Opening time 45s, Zigbee 40s)
23:02:50 Session Running Session running
23:02:52   Queue Resumed Observing Queue resumed
23:02:54     Target Started (10/30) Target started (10/30, AT2026coj (CV))
23:06:26   PHD2 Communication PHD2 is potentially stalled ('LoopingExposures' Events not detected)
23:06:45   PHD2 Restarted PHD2 service restarted
23:14:16     Target Completed Target partially completed (10/30, AT2026coj (CV))
23:14:20     Target Started (11/30) Target started (11/30, GCVS RR Leo)
23:17:59       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
23:20:21       Focusing Completed Foc1 AutoFocus Completed (Profile No 5)
23:25:49     Target Completed Target completed (11/30, GCVS RR Leo)
23:25:54     Target Started (12/30) Target started (12/30, UGCA 292)
23:30:41       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
23:32:48       Focusing Completed Foc1 AutoFocus Completed (Profile No 6)
23:55:35     Target Completed Target completed (12/30, UGCA 292)
23:55:40     Target Started (13/30) Target started (13/30, 29P/Schwassmann-Wachmann)
23:59:18       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
00:01:22       Focusing Completed Foc1 AutoFocus Completed (Profile No 7)
00:13:22     Target Completed Target completed (13/30, 29P/Schwassmann-Wachmann)
00:13:27     Target Started (14/30) Target started (14/30, UGCA 266)
00:33:31     Target Completed Target completed (14/30, UGCA 266)
00:33:35     Target Started (15/30) Target started (15/30, UGCA 278)
00:37:11       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-LSI)
00:53:34     Target Completed Target completed (15/30, UGCA 278)
00:54:38     Target Started (16/30) Target started (16/30, NGC 5049)
01:18:12     Target Completed Target completed (16/30, NGC 5049)
01:18:16     Target Started (17/30) Target started (17/30, NGC 5018)
01:22:09       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
01:24:37       Focusing Completed Foc1 AutoFocus Completed (Profile No 8)
01:40:34     Target Completed Target completed (17/30, NGC 5018)
01:40:38     Target Started (18/30) Target started (18/30, M63)
01:43:57       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
01:46:08       Focusing Completed Foc1 AutoFocus Completed (Profile No 9)
02:02:54     Target Completed Target completed (18/30, M63)
02:02:59     Target Started (19/30) Target started (19/30, NGC 6070 w/SN2026ejy)
02:07:27       Focusing Skipped Foc1 focusing skipped - unable to find a star (TCF-LSI)
02:08:33   Critical Cloud Alert Critical Cloud Alert (Obs.Manager will close the Dome)
02:08:35   HardSuspend Called Hard Suspend called due to Critical Conditions (cloud)
02:08:37     Target Aborted (19/30) Target aborted (19/30, NGC 6070 w/SN2026ejy) due to cloud
02:08:39   Queue Paused Queue paused for Session Suspension
02:08:41 Session Suspending Session suspending
02:09:28   Dome Closed Dome closed (Closing time 50s, Zigbee 43s)
02:09:31 Session Suspended Session suspended
02:20:54     Target Cancelled Target cancelled (19/30, NGC 6070 w/SN2026ejy) due to cloud
02:42:54     Target Cancelled Target cancelled (20/30, UGC 5381 w/SN2025ahep) due to cloud
02:56:20     Target Cancelled Target cancelled (21/30, T CrB) due to cloud
03:16:10     Target Cancelled Target cancelled (22/30, Nova Per 2020) due to cloud
03:29:30     Target Cancelled Target cancelled (23/30, Nova Cas 2021 (Nova)) due to cloud
03:49:35     Target Cancelled Target cancelled (24/30, UGC 11058 w/SN2026ewd) due to cloud
04:07:15     Target Cancelled Target cancelled (25/30, Berkeley 49) due to cloud
04:16:43     Target Cancelled Target cancelled (26/30, GCVS BL Lac) due to cloud
04:25:55     Target Cancelled Target cancelled (27/30, GCVS HH And) due to cloud
04:34:23     Target Cancelled Target cancelled (28/30, WDS GRB 34) due to cloud
04:43:11     Target Cancelled Target cancelled (29/30, GCVS TV Cas) due to cloud
04:51:38 Session Resuming Session resuming
04:52:23   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
04:52:24 Session Running Session running
04:52:26   Queue Resumed Observing Queue resumed
04:52:28     Target Started (30/30) Target started (30/30, UGC 622 w/AT2026epv)
05:13:28     Target Completed Target completed (30/30, UGC 622 w/AT2026epv)
05:13:30   Queue Completed Job Queue completed
05:13:32 Session Closing Session closing
05:14:20   Dome Closed Dome closed (Closing time 48s, Zigbee 43s)
05:14:56   Dome Parked Dome parked (parking time 28s), Az: 90.0 deg
05:15:56   Telescope Parked Telescope parked (parking time 55s total)
05:16:20   Telescope State Handbox reads 'Scope parked Turn scope off.'
05:17:29   Telescope Switched Off Telescope Power has been switched off via UPB Switch.
05:18:52   Services Stopped Night Services stopped
05:18:55 Session Finishing Session Finishing started (Create Fits Summary, Transfer Files)
05:19:27     Dome (Find Park) Find Park started (Search Az 88.0 to 92.0°, Step 0.2°, Narrow)
05:20:14     Dome Find Park found (Best Park Az 90.4°)
05:20:20     Dome Dome has been synced at park position (Az 90.0°, Adjustment: -0.4°)
05:20:22   Dome Parked Dome parked
05:20:35   Dome Charging Dome is parked and re-charging Ok (17mA)
05:20:37 Session Finished Session Finished
 
Session Alerts & Alarms
Time     Type       Name Detail
20:26:16 Green Clear Telescope Slew Telescope slew has been successfully aborted following timeout
20:26:18 Yellow Alert Telescope Slew Telescope slew has timed out after 2.5 minutes
05:20:35 Green Clear Dome Charging Dome is parked and re-charging Ok (17mA)
 

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Operational Issues (2026-03-09 S1404)

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Critical Issues

Major Issues

Minor Issues

Small Defects

Continuous Improvement

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Fig 1.  Stalled Telescope Slew to GW Ori (20:26)

Image

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2026-03-11


Siril 1.4.1

Siril application was updated to 1.4.1 on Development Computer (2026-03-09) and Observatory Computer (2026-03-11)
 [ See https://siril.org/download/2026-01-05-siril-1-4-1/ for details about the version,  released 2026-01-05 ]

The "OSC_stackframes.ssf" script using siril_cli, which is use for stacking frames captured by SharpCap during live sessions had to be modified in order to run successfully. The original script was failling at the line
    preprocess light -debayer
as the command 'preprocess' which was previously deprecated in earlier 1.2 version, has been removed from 1.4.  The line was replaced with
    calibrate light -debayer -prefix=pp_

After installation the SiriL Preferences were examined, and the "(Use) Bayer Information from file's header if available" was set to Ticked (this was either done by user or it was automatically set to ticked during installation.  However it produced a serious unwanted effect :

Siril was subsequently updated to SiriL 1.4.2 version on 2026-03-14 / 2026-03-14 /

Commands available in the current version (1.4.2) are at  https://siril.readthedocs.io/en/stable/Commands.html

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