Just 2 days after an observation of the same object a 12.59 second occultation was recorded again by Dave Herald from the same location, using video OSD technique. I am not sure if this is a record, but certainly unusual.
One clearly observed miss was recorded for this event.
View the updated prediction.
Observers: 1 D Herald,Murrumbateman, NSW, AU 2(M) D Gault,Kuriwa Observatory, NSW, AU 3(P) Prediction, 7 Jan
The ellipse above is plotted at the maximum axis ratio of 1:1.10 as
determined by lightcurve inversion data.
With only one chord we would normally assume the best esimate of the
objects position was on the observed chord.
In this case we have Dave Gaults miss as a constraining observation.
Clearly as shown in the first plot this would force a greater Axis ratio.
So it seems reasonable to assume that the second plot with Nemausa on the south side of the plot is the better model. Sadly there is no ISAM or DAMIT model to be sure of the actual orientation at the time of the object. However changing the orientation of the ellipse or treating Nemausa as a circle makes almost no difference in the position of the centre of the object.
The figure below shows the Tangra light curve of the occultation with analysis using the AOTA tool in Occult.
Observation details for MP ( 51 ) Nemausa By Star UCAC2 34249045 On 2014-01-14 at 10:58:55.0 _______________________________ Observer Dave Gault Location Kuriwa Observatory, NSW, AU Longitude +150:38 Latitude -33:39 Altitude 286 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 30 cm Seeing Steady Clear Camera Type Grasshopper Express with ADVS ADVS Camera Delay 0 Timing GPS - time inserted Video with frame analysis Missed Comments: _______________________________ Observer Dave Herald Location Murrumbateman, NSW, AU Longitude +148:59 Latitude -34:57 Altitude 594 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 40 cm Seeing Steady Clear Camera Type WAT120N+ PAL/CCIR Camera Delay -0.05 Timing GPS - time inserted Video with frame analysis Disappearance 10:59:00.58 Reappearance 10:59:13.17 Comments: Report prepopulated by IOTA Reporting Add-in for OW ver.1.8