Three occultations of 2 seconds each were recorded by David and Joan Dunham, using an unattended video recording setup, but two of them are regarded as doubtful.

Three misses were recorded for this event.

View the IOTA update.

Observers:
  1(M) D Herald, Murrumbateman, New South Wales, Australia
  2(M) D&J Dunham, Jugion, New South Wales, Australia      
  3(M) D&J Dunham, Bookham, New South Wales, Australia 
  4(?) D&J Dunham, Oolong, New South Wales, Australia 
  5(?) D&J Dunham, Breadalbane, New South Wales, Australia      
  6    D&J Dunham, Yarra, New South Wales, Australia      
  7(P) Prediction- IOTA Feed                

         



       

Discussion:

The DAMIT model above is plotted at the expected diameter of Semiramis. It appears that the event was to the northwest of the prediction, although with two doubtful occultations it is not possible to say how far. The DAMIT Model has been plotted on the definite observed chord .

Observational Data:

Observation details for MP ( 584 ) Semiramis
By Star              TYC 0248-01061-1 
On 2015-12-05  at 17:09:02.0

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Observer   Dave Herald
Location   Murrumbateman
Longitude  +148:59
Latitude   -34:57
Altitude   594 m
Datum      WGS84
Telescope Newtonian
Aperture   40 cm
Seeing     Steady Clear 
Camera Type  Watec 910BD    PAL/CCIR      
Camera Delay 
Timing     GPS - time inserted Video with frame analysis

Missed

Comments:  Lightcurve from 17:07:31 to 17:10:29 by Tangra v3.5.2 using AperturePhotometry/AverageBackground. Analysis by AOTA v4.1.6.1. Report prepopulated by IOTA Reporting Add-in for OW ver.1.8

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Observer   David and Joan Dunham
Location   Jugion, NSW, AU
Longitude  +148:18
Latitude   -34:49
Altitude   366 m
Datum      WGS84
Telescope Refractor
Aperture   12 cm
Seeing     Steady Clear 
Camera Type  PC164C-EX      NTSC/EIA      
Camera Delay 
Timing     GPS - time inserted Video, photo or photoelectric

Missed

Comments:  Remote unattended pre-pointed Sta. #1 using Supercircuits PC164C-EX2 (KT&C KBC 650) Ser# I5200086 camera & Canon ZR #37, tape CN03. +66 km (west) of pred. center n.e. of dead tree on hill n. of Kitticarrara Rd about 300m n.w. of M31 Hwy. ZR triggered with prog. Remote #3

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Observer   David and Joan Dunham
Location   Bookham, NSW, AU
Longitude  +148:38
Latitude   -34:48
Altitude   454 m
Datum      WGS84
Telescope Refractor
Aperture   12 cm
Seeing     Steady Clear 
Camera Type  PC164C-EX      NTSC/EIA      
Camera Delay 
Timing     GPS - other linking Video, photo or photoelectric

Missed

Comments: Pre-event IOTA-VTI calibration at 13:12 UT (-3.9h), post-event cal. at 19:17 UT (+2.1h), UTC = ZR time +22 seconds. Remote unattended pre-pointed Sta. #2 using Supercircuits PC164C-EX2 (KT&C KBC 650) Ser# LC609896 camera & Canon ZR #31, tape CN01. +34 km (west) of pred. center n. of gate on e. side of Illalong Rd about 300m n. of M31 Hwy. ZR triggered with programmable remote #4.

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Observer   David and Joan Dunham
Location   Oolong, NSW, AU
Longitude  +149:08
Latitude   -34:48
Altitude   576 m
Datum      WGS84
Telescope Refractor
Aperture   12 cm
Seeing     Steady Thin cloud < 2 
Camera Type  PC164C-EX      NTSC/EIA      
Camera Delay 
Timing     GPS - time inserted Video, photo or photoelectric
Disappearance  17:09:04.00
Reappearance   17:09:06.00
Comments: I'm calling this "probably possitive" but with the short event at Sta. 5 and misses east of center, this could be a miss. Remote unattended pre-pointed Sta. #3 using Supercircuits PC164C-EX2 (KT&C KBC 650) Ser# LC610048 camera & Canon ZR #35, tape CN02. -9 km (east) of pred. center between trees w. side of Chain of Ponds Rd about 300m n. of M31 Hwy. ZR triggered with prog. remote #1; T. Blank tripod

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Observer   David and Joan Dunham
Location   Breadalbane, NSW, AU
Longitude  +149:24
Latitude   -34:49
Altitude   747 m
Datum      WGS84
Telescope Dobsonian
Aperture   25 cm
Seeing     Steady Thin cloud < 2 
Camera Type  Watec 902H     PAL/CCIR      
Camera Delay 
Timing     GPS - time inserted Video, photo or photoelectric
Disappearance  17:09:04.00
Reappearance   17:09:06.00
Comments: With the short event at Sta. 5, & misses e. of center, this may be a miss, but if so, the shift is huge, about 2.1 sigma. Remote unattended pre-pointed Sta. #4 using Watec 902H Ser# W1348C10875 camera & MDVR #4 with "Suitcase" telescope -30 km (east) of pred. center on n. side of trees on n. side of  M31 (Hume) Hwy just e. of Lerida North Rd.

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Observer   David and Joan Dunham
Location   Yarra, NSW, AU
Longitude  +149:37
Latitude   -34:47
Altitude   668 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   20 cm
Seeing     Steady Thin cloud < 2 
Camera Type  PC164C-EX      NTSC/EIA      
Camera Delay 
Timing     GPS - time inserted Video with frame analysis
Disappearance  17:09:04.40
Reappearance   17:09:05.89
Comments:  Attended pre-pointed Sta. #5 using Supercircuits PC164C-EX2 (KT&C KBC 650) Ser# I5200072 camera recorded direct to Joan's laptop. -51 km (east) of pred. center on w. side of Coles Rd about 400m n. of M31 Hwy.