Two Positive chords were recorded , using video OSD technique.
View the updated prediction.
Observers: 1 J Milner,Glen Forrest, WA, AU 2 S Kerr,Rockhampton,QLD,AU 3(P) Prediction
The ellipse above is plotted at the best fit axis ratio as determined by Occult. This is close to the same area as a circle of the expected 82 km diameter of Thetis. With 2 chords we can be confident of the path of Thetis and that it was south of the predicted line.
The two ISAM 3D models have been overlaid on the measured ellipse and both show good fit making it difficult to determine which of the two 3D sdolutions is the better fit.
The figure below shows the Tangra light curve of Jacquie's occultation.
The figure below shows the Tangra light curve of Steve's occultation.
Observation details for MP ( 17 ) Thetis By Star UCAC2 37660277 On 2013-08-23 at 19:04:10.0 _______________________________ Observer Jacquie Milner Location Glen Forrest, WA, AU Longitude +116:05 Latitude -31:54 Altitude 260 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 20 cm Seeing Slight flickering Clear Camera Type Mintron 12V1C-EX PAL/CCIR Camera Delay -0.08 Timing GPS - time inserted Video with frame analysis Disappearance 19:04:04.66 Reappearance 19:04:08.18 Comments: f3.3 focal reducer used. Only 18 degrees above the horizon for me. My first positive result! Great to see after a very frustrating run with the winter weather. _______________________________ Observer S. Kerr Location Rockhampton Longitude +150:30 Latitude -23:16 Altitude 50 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 30 cm Seeing Slight flickering Clear Camera Type WAT120N+ PAL/CCIR Camera Delay -0.11 Timing GPS - time inserted Video with frame analysis Disappearance 19:06:07.19 Reappearance 19:06:10.87 Comments: Report prepopulated by IOTA Reporting Add-in for OW ver.1.7