A total of five positive occultation recordings were made by David Dunham, using an unattended video recording setup. An additional three unattended stations recorded misses to the north while Richard Williamson observed a miss to the south.

Four misses were recorded for this event.

View the IOTA update.

Observers:
  1(M) D Dunham,Tilmouth Well, NT, Australia
  2(M) D Dunham,Tilmouth Well, NT, Australia
  3(M) D Dunham,Tilmouth Well, NT, Australia
  4    D Dunham,Amburla, NT, Australia      
  5    D Dunham,Amburla, NT, Australia      
  6    D Dunham,amilton Downs, NT, Australia
  7    D Dunham,amilton Downs, NT, Australia
  8(P) Prediction                           
  9    D Dunham, (Hwy 5 3 km east of Hwy 87)
 10(M) R Williamson,Connellon, NT, Australia                

         



       

Discussion:

Demonstrating the power of multiple unattended site observations, David's reports clearly indicate that (100) Hekate is a roughly oval object with approximate dimension of 100 km by 80 km but also with some irregular profiles. The negative chords also clearly define the limits. Very impressive! Congratulations!

Observational Data:

Observation details for MP ( 100 ) Hekate
By Star              TYC 6338-01180-1 
On 2015-08-22  at 16:57:00.0

_______________________________

Observer   David and Joan Dunham
Location   north of Alice Springs, NT, Australia (Hwy 5 3 km east of Hwy 87)
Longitude  +133:50
Latitude   -23:32
Altitude   732 m
Datum      WGS84
Telescope Refractor
Aperture    8 cm
Seeing     Steady Thin cloud < 2 
Camera Type  Other - List in Comments     NTSC/EIA      
Camera Delay 
Timing     GPS - other linking Video with frame analysis
Disappearance  16:57:01.91
Reappearance   16:57:10.77
Comments: Remote unattended pre-pointed Sta. #1 using a KT&C KPC-650-BH (NTSC) camera, "Supercircuits PC164C-EX2", serial # LC609896. -17 km (south) of pred. center. IOTA-VTI pre-cal 9:17UT (event -7.7h), post-cal 20:23UT (event +3.4h);  .avi files were uploaded to IOTA Dropbox folder. Recorded with Canon ZR60 #35 and event recording triggered with Sony programmable remote #1

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Observer   David and Joan Dunham
Location   Hamilton Downs, NT, Australia
Longitude  +133:35
Latitude   -23:30
Altitude   703 m
Datum      WGS84
Telescope Refractor
Aperture    8 cm
Seeing     Steady Thin cloud < 2 
Camera Type  Other - List in Comments     NTSC/EIA      
Camera Delay 
Timing     GPS - other linking Video with frame analysis
Disappearance  16:57:01.51
Reappearance   16:57:12.84
Comments: Remote unattended pre-pointed Sta. #2 using a KT&C KPC-650-BH (NTSC) camera, "Supercircuits PC164C-EX2", serial # I5200066. +1 km (north) of pred. center. IOTA-VTI pre-cal 10:32UT (event -6.4h), post-cal 19:56UT (event +3.0h);  .avi files were uploaded to IOTA Dropbox folder. Recorded with Canon ZR60 Scotty #12 and event recording triggered with Sony programmable remote #2

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Observer   David and Joan Dunham
Location   Hamilton Downs, NT, Australia
Longitude  +133:20
Latitude   -23:29
Altitude   670 m
Datum      WGS84
Telescope Refractor
Aperture   12 cm
Seeing     Slight flickering Thick cloud > 2 
Camera Type  Watec 902H     PAL/CCIR      
Camera Delay 
Timing     GPS - other linking Video with frame analysis
Disappearance  16:57:01.34
Reappearance   16:57:13.62
Comments: Remote unattended pre-pointed Sta. #3 using a Watec 902H Ultimate PAL camera, serial # W134BC10876. +19 km (north) of pred. center. IOTA-VTI pre-cal 11:21UT (event -5.6h) file 112114_CH1_MAN, post-cal 19:25UT (event +2.5h) 192453_CH1_MAN.AVI Schedule recording with Mini DVR #2. Wrong stop created 1h 3.9G file, so copied occ'n part to PAL Canon camcorder to create smaller .avi file. 

_______________________________

Observer   David and Joan Dunham
Location   Amburla, NT, Australia
Longitude  +133:09
Latitude   -23:22
Altitude   629 m
Datum      WGS84
Telescope Refractor
Aperture    8 cm
Seeing     Slight flickering Thin cloud < 2 
Camera Type  Other - List in Comments     NTSC/EIA      
Camera Delay 
Timing     GPS - other linking Video with frame analysis
Disappearance  16:57:03.21
Reappearance   16:57:12.64
Comments: Remote unattended pre-pointed Sta. #4 using a KT&C KPC-650-BH (NTSC) camera, "Supercircuits PC164C-EX2", serial # I336339. +41 km (north) of pred. center. IOTA-VTI pre-cal 12:05UT (event -4.9h), post-cal 18:58UT (event +2.0h);  .avi files were uploaded to IOTA Dropbox folder. Recorded with Canon ZR60 #37 and event recording triggered with Sony programmable remote #3

_______________________________

Observer   David and Joan Dunham
Location   Amburla, NT, Australia
Longitude  +132:56
Latitude   -23:16
Altitude   614 m
Datum      WGS84
Telescope Refractor
Aperture    8 cm
Seeing     Steady Clear 
Camera Type  Other - List in Comments     NTSC/EIA      
Camera Delay 
Timing     GPS - other linking Video with frame analysis
Disappearance  16:57:04.17
Reappearance   16:57:09.97
Comments: Remote unattended pre-pointed Sta. #5 using a KT&C KPC-650-BH (NTSC) camera, "Supercircuits PC164C-EX2", serial # LC610019. +63 km (north) of pred. center. IOTA-VTI pre-cal 13:17UT (event -3.7h), post-cal 18:31UT (event +1.6h);  .avi files were uploaded to IOTA Dropbox folder. Recorded with Canon ZR60 #31 and event recording triggered with Sony programmable remote #4; also, midi paver mount #4.