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Two occultation were recorded by John Broughton, using video OSD technique.
He also observed a clear miss for this event.
View the updated prediction.
Observers:
1(M) J Broughton,Mororo, NSW, AU
2 J Broughton,Brunswick Heads, QLD, AU
3 J Broughton,Wardell, NSW, AU
4(P) Prediction - IOTA Feed
Discussion:
The circle above is plotted at the expected 102 km diameter of Hertha. Also shown is the ISAM shape model which is distinctly non-circular and has been confirmed by a very successful occultation observations made in the USA in 2008. The two observed chords and the miss observation confirm a shift to the north but does not significantly add information on the shape and size of (135) Hertha.
The figures below shows the Tangra light curves of the occultations.
Observational Data:
Observation details for MP ( 135 ) Hertha
By Star TYC 6880-01034-1
On 2015-07-06 at 17:44:19.0
_______________________________
Observer John Broughton
Location Mororo, NSW, AU
Longitude +153:13
Latitude -29:18
Altitude 45 m
Datum WGS84
Telescope Newtonian
Aperture 25 cm
Seeing Steady Clear
Camera Type Watec 120N+ PAL/CCIR
Camera Delay
Timing GPS - time inserted Video with frame analysis
Missed
Comments:
_______________________________
Observer John Broughton
Location Brunswick Heads, QLD, AU
Longitude +153:32
Latitude -28:32
Altitude 5 m
Datum WGS84
Telescope Newtonian
Aperture 8 cm
Seeing Slight flickering Clear
Camera Type LN-300-11673 PAL/CCIR
Camera Delay
Timing GPS - other linking Video with frame analysis
Disappearance 17:44:18.49
Reappearance 17:44:31.77
Comments:
_______________________________
Observer John Broughton
Location Wardell, NSW, AU
Longitude +153:27
Latitude -28:57
Altitude 5 m
Datum WGS84
Telescope SCT including Cass and Mak
Aperture 9 cm
Seeing Steady Clear
Camera Type LN-300-11673 PAL/CCIR
Camera Delay
Timing GPS - other linking Video with frame analysis
Disappearance 17:44:22.66
Reappearance 17:44:34.98
Comments: