Two Positive chords were , using Video OSD technique.
No clearly observed misses were recorded for this event.
View the TT14 prediction.
Observers: 1 D Gault,Kuriwa Observatory, NSW, AU 2 D Herald,Murrumbateman, NSW, AU 3(P) Prediction, TT14 27 Sept
The ellipse above is plotted at the maximum axis ratio as determined by lightcurve inversion data and with a similar area to the predicted diameter of 194 km. With two fairly close chords of similar size and roughly parallel edges it is not possible to determine whether the Daves were north or south of the central line of the event. However we can be confident that the path of Hermione was north of the predicted line. The DAMIT 3D model has been overlaid on the ellipse and shows reasonable fit. There are 2 DAMIT Models - I have chosen the one that gives slightly better fit but is also shows the new concave modeling ability which implies a large crater on the face of Hermione.
The figure below shows the IOTA analysis of Dave Herald's light curve of the occultation.
The figure below shows the IOTA analysis of Dave Gault's light curve of the occultation.
Observation details for MP ( 121 ) Hermione By Star UCAC4 318-238889 On 2014-10-17 at 13:46:57.0 _______________________________ 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 Slight flickering Clear Camera Type WAT910BD PAL/CCIR Camera Delay -0.04 Timing GPS - time inserted Video with frame analysis Disappearance 13:46:33.54 Reappearance 13:46:45.38 Comments: A perfect event! Lightcurve from 13:44:59 to 13:47:28 by Tangra v3.1.10 using AperturePhotometry/BackgroundMedian. Analysis by AOTA v184.108.40.206. Report prepopulated by IOTA Reporting Add-in for OW ver.1.8 _______________________________ 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 Disappearance 13:46:46.88 Reappearance 13:46:58.15 Comments: Lightcurve from 13:45:50 to 13:48:16 by Tangra v3.1.10 using AperturePhotometry/AverageBackground. Analysis by AOTA v220.127.116.11. Report prepopulated by IOTA Reporting Add-in for OW ver.1.8