David's Astronomy Pages
Notes - Session 1378 (2025-11-25)

 
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 (2),  Continuous Improvement (5)
- Figures (2)
   
Bullet Images from 2025-11-25  >>           
   
   

Session Aims & Highlights (2025-11-25)

Main aims

  1. Targets.  Acquire images of a selection of variable stars, nearby stars, comets & deep sky targets as allowed by sky conditions.
  2. C/2025 K1 (ATLAS) - Acquire images of comet C/2025 K1 (ATLAS), attempt to image the recently annouched split in comet, and new objects C/2025 K1-B & C/2025 K1-C
  3. 3I/ATLAS - Acquire images of the interstellar comet 3I/ATLAS (alias C/2025 N1 (ATLAS)
  4. AstroMain - Check fixes added to AstroMain 3.78.9 for fixing issue with failed telescope slews and Dome Reconnection after a Dome Restart.

 Equipment & Software

Highlights

NotesNotes

Summary Plots & Logs

Observing Plan
Image
  
Observing Result
Image
   
Image
 
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)
Image 
  
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)
Image   
  
Actual Weather vs Pre-Session Weather Forecast
Image
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Session Event Log
Time     Event Detail
16:15:58 Session Monitoring AutoStart monitoring for Live Session opportunity between 16:25 & 06:16
16:16:02   AutoStart Waiting AutoStart waiting till earliest start time at 16:25
16:25:13   AutoStart Delayed Session delayed due to too few stars
16:53:05 Session AutoStarting Session autostarting (16:53)
16:53:18   CCDSoft Restarting CCDSoft being restarted (to set AutoSave No.)
16:53:33 Session Created Session Created (Live, 2025-11-25 S01378, ImageSaveNum: 1378001)
16:53:40   Scope Switched On Telescope Power has been switched on via UPB Switch
16:55:26   Services Started Observatory Services started
16:55:37 Observatory (Auto) Observatory placed in Fully-Automated Mode
16:55:39   AutoStart Delayed Session delayed due to too few stars
16:55:41 Session Pending Session pending (2025-11-25)
16:55:43 Session Initiating Session initiating (2025-11-25)
16:56:01   Camera1 Connected SBIG Camera connected (Set point -25°C)
16:56:04   Plan Requested Observing Plan requested from AstroPlan (1.44)
16:56:40   Plan Loaded Observing Plan loaded to queue (Plan ID: 1165)
16:57:21   Telescope Connected Telescope connected (TheSky6)
16:57:45 Session Equilibration Session ready to Open Dome
16:59:05   Wait On Weather Waiting for acceptable conditions
16:59:07 Session Suspending Session suspending
16:59:09   Dome Closed Dome already closed
16:59:11 Session Suspended Session suspended
16:59:38   Queue Started Observing Queue started (43 targets selected)
17:12:12 Session Resuming Session resuming
17:12:57   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
17:12:59 Session Running Session running
17:13:01   Queue Resumed Observing Queue resumed
17:13:03     Target Started (1/43) Target started (1/43, T CrB)
17:13:17       Dome Unparked Dome unparked
17:13:28       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:13:43       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:14:52       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:15:22       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:16:56       Focusing Started-Foc2 Foc2 Focusing Started (Secondary Scope, using ShCap)
17:17:32       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:18:33       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:19:00       Focusing Completed Foc2 AutoFocus Completed (Profile No 1, wide)
17:20:02       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:20:41       Focusing Completed Foc2 AutoFocus Completed (Profile No 1)
17:20:43       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:22:13       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:22:36       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
17:23:12       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:24:53       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:25:32       Focusing Completed Foc1 AutoFocus Completed (Profile No 2, wide)
17:25:53       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:27:34       Focusing Completed Foc1 AutoFocus Completed (Profile No 2)
17:28:37     Target Completed Target partially completed (1/43, T CrB)
17:28:41     Target Started (2/43) Target started (2/43, HIP 87937)
17:30:03       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:30:34       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:34:09       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:34:37     Target Completed Target completed (2/43, HIP 87937)
17:34:39   Queue Paused Queue paused for Session Suspension
17:34:41 Session Suspending Session suspending
17:35:29   Dome Closed Dome closed (Closing time 49s, Zigbee 43s)
17:35:31 Session Suspended Session suspended
17:37:29 Session Resuming Session resuming
17:38:14   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
17:38:17 Session Running Session running
17:38:19   Queue Resumed Observing Queue resumed
17:38:22     Target Started (3/43) Target started (3/43, Nova Ser 2025)
17:41:00       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:42:00       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:45:40       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:46:10       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:47:50       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:48:38     Target Completed Target completed (3/43, Nova Ser 2025)
17:48:40   Queue Paused Queue paused for Session Suspension
17:48:43 Session Suspending Session suspending
17:49:31   Dome Closed Dome closed (Closing time 50s, Zigbee 43s)
17:49:33 Session Suspended Session suspended
17:51:36 Session Resuming Session resuming
17:52:21   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
17:52:23 Session Running Session running
17:52:25   Queue Resumed Observing Queue resumed
17:52:27     Target Started (4/43) Target started (4/43, GCVS WZ Sge)
17:54:01       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:54:31       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:55:41       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:56:11       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:56:41       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
17:57:11       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
17:59:21       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
18:00:40     Target Completed Target completed (4/43, GCVS WZ Sge)
18:00:42   Queue Paused Queue paused for Session Suspension
18:00:44 Session Suspending Session suspending
18:01:32   Dome Closed Dome closed (Closing time 50s, Zigbee 43s)
18:01:34 Session Suspended Session suspended
18:04:32 Session Resuming Session resuming
18:05:13     Target Missed (5/43) Target's time slot was missed (5/43, GCVS BL Lac)
18:05:17   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
18:05:19 Session Running Session running
18:05:21   Queue Resumed Observing Queue resumed
18:05:24     Target Started (6/43) Target started (6/43, UGC 10809 w/SN2025vaw)
18:06:02       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
18:08:52       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
18:11:17       Focusing Completed Foc1 AutoFocus Completed (Profile No 3)
18:27:33     Target Completed Target completed (6/43, UGC 10809 w/SN2025vaw)
18:27:35   Queue Paused Queue paused for Session Suspension
18:27:37 Session Suspending Session suspending
18:28:24   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
18:28:27 Session Suspended Session suspended
18:43:08     Target Cancelled Target cancelled (7/43, C/2025 T1 (ATLAS)) due to cloud
18:58:58 Session Resuming Session resuming
18:59:43   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
18:59:46 Session Running Session running
18:59:48   Queue Resumed Observing Queue resumed
18:59:50     Target Started (8/43) Target started (8/43, SN 2025taz)
18:59:52       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
19:02:04       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
19:09:57     Target Completed Target partially completed (8/43, SN 2025taz)
19:10:01     Target Started (9/43) Target started (9/43, GCVS CY Lyr)
19:13:12       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
19:15:32       Focusing Completed Foc1 AutoFocus Completed (Profile No 4)
19:19:21     Target Completed Target completed (9/43, GCVS CY Lyr)
19:19:25     Target Started (10/43) Target started (10/43, M31 w/Nova M31 2025-11c?)
19:23:24       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
19:26:17       Focusing Completed Foc1 AutoFocus Completed (Profile No 5)
19:42:34     Target Completed Target completed (10/43, M31 w/Nova M31 2025-11c?)
19:42:38     Target Started (11/43) Target started (11/43, NGC 691)
19:46:12       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
19:48:37       Focusing Failed Foc1 focusing failed (failed QC check - RmsE)
20:03:40       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
20:04:09       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
20:04:41     Target Completed Target completed (11/43, NGC 691)
20:04:45     Target Started (12/43) Target started (12/43, NGC 600 w/AT2025abzu)
20:15:10       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
20:16:10       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
20:25:04     Target Completed Target completed (12/43, NGC 600 w/AT2025abzu)
20:25:08     Target Started (13/43) Target started (13/43, AT2025abet)
20:27:42       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
20:28:12       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
20:28:37       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
20:30:54       Focusing Completed Foc1 AutoFocus Completed (Profile No 7)
20:46:55     Target Completed Target completed (13/43, AT2025abet)
20:47:00     Target Started (14/43) Target started (14/43, GCVS Z And)
20:50:12       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
20:52:32       Focusing Completed Foc1 AutoFocus Completed (Profile No 8)
20:55:54     Target Completed Target completed (14/43, GCVS Z And)
20:55:58     Target Started (15/43) Target started (15/43, GCVS RX And)
20:58:54       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
21:01:10       Focusing Completed Foc1 AutoFocus Completed (Profile No 9)
21:03:43     Target Completed Target completed (15/43, GCVS RX And)
21:05:05     Target Started (16/43) Target started (16/43, IC 167)
21:08:39       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
21:11:18       Focusing Completed Foc1 AutoFocus Completed (Profile No 10)
21:26:13       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
21:26:42       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
21:33:54     Target Completed Target completed (16/43, IC 167)
21:33:58     Target Started (17/43) Target started (17/43, NGC 907)
21:39:45       Focusing Skipped Foc1 focusing skipped - star is lost (TCF-LSI)
21:56:09     Target Completed Target completed (17/43, NGC 907)
21:56:13     Target Started (18/43) Target started (18/43, AT2023acib)
22:00:43       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
22:03:14       Focusing Completed Foc1 AutoFocus Completed (Profile No 11)
22:12:06     Target Completed Target completed (18/43, AT2023acib)
22:12:10     Target Started (19/43) Target started (19/43, Jones 1)
22:15:11       Focusing Skipped Foc1 focusing skipped - star is lost (TCF-LSI)
22:24:14       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
22:25:14       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
22:25:49       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
22:27:59       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
22:29:39       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
22:29:54       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
22:37:33     Target Completed Target completed (19/43, Jones 1)
22:39:52     Target Started (20/43) Target started (20/43, UGCA 31)
22:46:44       Focusing Skipped Foc1 focusing skipped - unable to find a star (TCF-LSI)
22:52:06       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
22:52:08   Critical Cloud Alert Critical Cloud Alert (Obs.Manager will close the Dome)
22:52:10   HardSuspend Called Hard Suspend called due to Critical Conditions (cloud)
22:52:12     Target Aborted (20/43) Target aborted (20/43, UGCA 31) due to cloud
22:52:14   Queue Paused Queue paused for Session Suspension
22:52:16 Session Suspending Session suspending
22:53:01   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
22:53:03 Session Suspended Session suspended
22:59:08     Target Cancelled Target cancelled (20/43, UGCA 31) due to cloud
23:21:28     Target Cancelled Target cancelled (21/43, SN 2025aarn) due to cloud
23:43:28     Target Cancelled Target cancelled (22/43, LEDA 68428 w/SN2025acqv) due to cloud
00:01:06     Target Cancelled Target cancelled (23/43, C/2025 R2 (SWAN)) due to too few stars
00:02:48 Session Resuming Session resuming
00:03:33   Dome Opened Dome opened (Opening time 45s, Zigbee 42s)
00:03:35 Session Running Session running
00:03:37   Queue Resumed Observing Queue resumed
00:03:40     Target Started (24/43) Target started (24/43, AT2025adxl)
00:05:53       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
00:06:33       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
00:06:56       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
00:09:00       Focusing Completed Foc1 AutoFocus Completed (Profile No 12)
00:25:01     Target Completed Target completed (24/43, AT2025adxl)
00:25:06     Target Started (25/43) Target started (25/43, AT2025abne)
00:29:03       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
00:31:55       Focusing Completed Foc1 AutoFocus Completed (Profile No 13)
00:48:33     Target Completed Target completed (25/43, AT2025abne)
00:48:38     Target Started (26/43) Target started (26/43, SN 2023eb)
01:12:00     Target Completed Target completed (26/43, SN 2023eb)
01:12:04     Target Started (27/43) Target started (27/43, Capella)
01:14:09     Target Aborted (27/43) Target aborted (27/43, Capella) due to Priority 1 ToO Target
01:14:13     Target Started (28/44) Target started (28/44, C/2025 K1 (ATLAS), ToO)
01:14:18     Target Failed (28/44) Target failed due to dec limit (28/44, C/2025 K1 (ATLAS), ToO)
01:16:14     Target Started (29/44) Target started (29/44, AT2025abwz)
01:20:33       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
01:23:05       Focusing Completed Foc1 AutoFocus Completed (Profile No 14)
01:40:17     Target Completed Target completed (29/44, AT2025abwz)
01:40:21     Target Started (30/44) Target started (30/44, UGC 3458 w/SN2025yao)
01:45:36       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
01:47:52       Focusing Completed Foc1 AutoFocus Completed (Profile No 15)
02:05:16     Target Completed Target completed (30/44, UGC 3458 w/SN2025yao)
02:05:20     Target Started (31/44) Target started (31/44, UGC 3791 w/SN2025tsy)
02:26:24     Target Completed Target completed (31/44, UGC 3791 w/SN2025tsy)
02:26:29     Target Started (32/44) Target started (32/44, AT2022vdr (CV))
02:36:49     Target Completed Target completed (32/44, AT2022vdr (CV))
02:36:53     Target Started (33/44) Target started (33/44, AT2024jfs)
02:39:34   Telescope Slew Telescope slew has timed out after 2.5 minutes
03:00:24     Target Completed Target completed (33/44, AT2024jfs)
03:00:28     Target Started (34/44) Target started (34/44, UGC 4316 w/AT2025advo)
03:20:38     Target Completed Target completed (34/44, UGC 4316 w/AT2025advo)
03:20:42     Target Started (35/44) Target started (35/44, AT2025acvr (CV))
03:24:58       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
03:27:24       Focusing Completed Foc1 AutoFocus Completed (Profile No 16)
03:44:32     Target Completed Target completed (35/44, AT2025acvr (CV))
03:44:37     Target Started (36/44) Target started (36/44, CGCG 213-027 w/SN2025rdu)
04:05:08     Target Completed Target completed (36/44, CGCG 213-027 w/SN2025rdu)
04:05:12     Target Started (37/44) Target started (37/44, NGC 3106 w/SN2025aauj)
04:08:27       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
04:11:09       Focusing Completed Foc1 AutoFocus Completed (Profile No 17)
04:27:48     Target Completed Target completed (37/44, NGC 3106 w/SN2025aauj)
04:27:52     Target Started (38/44) Target started (38/44, NGC 2749 w/SN2025mve)
04:31:51       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
04:34:33       Focusing Completed Foc1 AutoFocus Completed (Profile No 18)
04:51:12     Target Completed Target completed (38/44, NGC 2749 w/SN2025mve)
04:51:16     Target Started (39/44) Target started (39/44, GCVS CN Leo)
05:03:37       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
05:04:17     Target Completed Target completed (39/44, GCVS CN Leo)
05:04:20   Queue Paused Queue paused for Session Suspension
05:04:22 Session Suspending Session suspending
05:05:12   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
05:05:15 Session Suspended Session suspended
05:18:28 Session Resuming Session resuming
05:19:14   Dome Opened Dome opened (Opening time 45s, Zigbee 42s)
05:19:16 Session Running Session running
05:19:18   Queue Resumed Observing Queue resumed
05:19:20       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
05:19:22     Target Started (40/44) Target started (40/44, LEDA 213320 w/SN2025tji)
05:21:07     Target Aborted (40/44) Target aborted (40/44, LEDA 213320 w/SN2025tji) due to Priority 1 ToO Target
05:21:09   Queue Paused Queue paused for Session Suspension
05:21:11 Session Suspending Session suspending
05:21:59   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
05:22:01 Session Suspended Session suspended
05:24:04 Session Resuming Session resuming
05:24:49   Dome Opened Dome opened (Opening time 45s, Zigbee 42s)
05:24:51 Session Running Session running
05:24:53   Queue Resumed Observing Queue resumed
05:24:56     Target Started (41/45) Target started (41/45, 3I/ATLAS, ToO)
05:50:21     Target Completed Target completed (41/45, 3I/ATLAS, ToO)
05:50:26     Target Started (42/46) Target started (42/46, 3I/ATLAS, ToO)
05:53:14       Focusing Skipped Foc1 focusing skipped - unable to find a star (TCF-LSI)
06:12:18     Target Completed Target completed (42/46, 3I/ATLAS, ToO)
06:12:22     Target Started (43/47) Target started (43/47, 3I/ATLAS, ToO)
06:13:45     Target Aborted (43/47) Target aborted (43/47, 3I/ATLAS, ToO) due to User Intervention
06:13:49     Target Started (44/48) Target started (44/48, 3I/ATLAS, ToO)
06:36:14     Target Completed Target completed (44/48, 3I/ATLAS, ToO)
06:36:18     Target Started (45/49) Target started (45/49, 3I/ATLAS, ToO)
06:38:40       Focusing Skipped Foc1 focusing skipped - unable to find a star (TCF-LSI)
06:58:40     Target Completed Target completed (45/49, 3I/ATLAS, ToO)
06:58:42     Target Missed (46/49) Target's time slot was missed (46/49, NGC 2642 w/SN2023aaby)
06:58:44     Target Missed (47/49) Target's time slot was missed (47/49, 29P/Schwassmann-Wachmann)
06:58:46     Target Missed (48/49) Target's time slot was missed (48/49, NGC 4710 w/AT2025acfi)
06:58:48     Target Missed (49/49) Target's time slot was missed (49/49, GCVS RZ LMi)
06:58:50   Queue Completed Job Queue completed
06:58:52 Session Closing Session closing
06:59:39   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
07:00:22   Dome Parked Dome parked (parking time 36s), Az: 90.1 deg
07:00:59   Telescope Parked Telescope parked (parking time 32s total)
07:01:28   Telescope State Handbox reads 'Scope parked Turn scope off.'
07:01:51   Telescope Switched Off Telescope Power has been switched off via UPB Switch.
07:03:36   Services Stopped Night Services stopped
07:03:39 Session Finishing Session Finishing started (Create Fits Summary, Transfer Files)
07:04:56     Dome (Find Park) Find Park started (Search Az 88.0 to 92.0°, Step 0.2°, Narrow)
07:05:41     Dome Find Park found (Best Park Az 90.6°)
07:05:46     Dome Dome has been synced at park position (Az 90.0°, Adjustment: -0.7°)
07:05:48   Dome Parked Dome parked
07:06:04   Dome Charging Dome is parked and re-charging Ok (14mA)
07:06:06 Session Finished Session Finished
 
Session Alerts & Alarms
Time     Type       Name Detail
02:39:34 Green Clear Telescope Slew Telescope slew has been successfully aborted following timeout
02:39:36 Yellow Alert Telescope Slew Telescope slew has timed out after 2.5 minutes
07:06:04 Green Clear Dome Charging Dome is parked and re-charging Ok (14mA)
 

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Operational Issues (2025-11-25 S1378)

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Fig 1.  Part of Guiding Chart for 3I/ATLAS (2025-11-26 06:16)

- 3I/Atlas was being acquired under conditions where there might have been passing clouds. 
- PHD2 Guiding was active and was using a guide star with SNR of around 50-60 (black line on graph)
-
At several points there were lost Star Events.  It is unclear if these were caused by passing cloud or not

- As the lost star event where short (just 1 or 2 measurement) the SNR graph line is draw as continuous line through the lost star events.  This is misleading.  It is unsure if PHD2 was continued to report the previous SNR value or whether AstromMain's Guiding Chart routines interpolated across from the last SNR point.
It is proposed that the black SNR line is not plotted when the star is lost.

- A deflection in the Guide Star's RA position is noted after at least 5 lost star events (but with no deflection in Dec).
- It seems unlikely that all these deflections were associated with normal periodic error intervals.

- It is possible that there were a non-periodic events, defects in worm drive or cable hold-up resisting telescope tracking, and the rapid movement causing a bluring of the guide star leading to 'categorising' as a lost star event.

- Another possibility is that passing cloud caused a refraction of the guide star and was seen as a movement in the guide star and triggered a guide correction, but why it there no change in guide star in the Dec direction.

- Would it be helpful to disable guide corection for the guide frame immediately after the guide star.

Image

Fig 2.  Realtime JPG Picture Issue for IC 167

The picture below is a screenshot of the JPG pictures for the first main main frame from IC167 as shown on the Latest Images web page for the S1378 session.

The image on the left is standard full frame view and is normal, but the image on right is anomalous, it is meant to show an annotated view that is zoomed in on the target (IC 167) and cropped to the same picture size (as left) or zoomed in on the centre of the frame if IC 167's picture coordinates are unknown.  

In this case the picture is zoomed into the bottom right hand part of the full frame, is unlabelled and is taller than expected.

Image

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