|
Dave Herald recorded a very brief 0.35 second occultation from Murrambateman, New South Wales while John Newman in Canberra recorded a longer 1.9 second event.
View the IOTA update.
Observers: 1 D Herald,Murrumbateman, NSW, AU 2 J Newman,Canberra, ACT, AU 3(P) Prediction
Discussion:
While Dave and John's observed chords are quite close together, it is quite clear that the actual centreline of the event was to their south. The fit is improved if the outline of (445) Edna is assumed to be slightly elliptical as shown above.
The figure below shows the Tangra light curve of the occultation.
Observational Data:
Observation details for MP ( 445 ) Edna By Star TYC 7835-01859-1 On 2017-01-29 at 16:32:10.0 _______________________________ Observer Dave Herald Location Murrumbateman 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 Watec 910BD PAL/CCIR Camera Delay Timing GPS - time inserted Video, photo or photoelectric Disappearance 16:32:08.63 Reappearance 16:32:08.98 Comments: A very definite but short occn Report prepopulated by IOTA Reporting Add-in for OW ver.1.8 _______________________________ Observer John Newman Location Canberra, ACT, AU Longitude +149:02 Latitude -35:11 Altitude 657 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 40 cm Seeing Steady Clear Camera Type Watec 910BD PAL/CCIR Camera Delay Timing GPS - time inserted Video with frame analysis Disappearance 16:32:09.14 Reappearance 16:32:11.08 Comments: Report prepopulated by IOTA Reporting Add-in for OW ver.1.8