A 3 second occultation was observed visually by Rob Horvat at Glenbrook, New South Wales. Negative observations were reported by Dave Gault observing with an ADVS system at Hawkesbury Heights in New South Wales and by Chad Ellington in Kent, Washington, USA using a conventional video system.
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Observers: 1(M) C Ellington,Burlington, WA 2(M) D Gault,Kuriwa Observatory, NSW, AU 3 Horvat,Glenbrook, NSW, AU 4(P) Prediction
The circle above is plotted at the expected 43 km diameter of Bressole. With two negative observations so close to both the north and south of Rob's observed chord, it is hard to reconcile an intepretation of this observation. The star is bright as seen through a 30cm scope (v mag = 10.2) and while the moon was also bright, it was not close to the field.This is an unusual obseravtion in that the observers are spaced along way apart with Chad Ellington observing from the west coast of the USA. It is possible (although unlikely) that (1211) Bressole would have significantly rotated between the times of the events observed on each side of the Pacific presenting a different profile to each observer. Even though, it is had to come to any conclusion other than that Bressole is much smaller than predicted and/or of a very irregular outline.
Observation details for MP ( 1211 ) Bressole By Star TYC 6251-00476-1 On 2015-08-04 at 08:01:37.0 _______________________________ Observer Chad K Ellington Location Burlington, WA Longitude -122:19 Latitude +48:27 Altitude 11 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 25 cm Seeing Strong flickering Thin cloud < 2 Camera Type PC164C NTSC/EIA Camera Delay Timing GPS - time inserted Video, photo or photoelectric Missed Comments: Did not notice anything live besides flickering. Video analysis confirms this…no event. 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 Slight flickering Clear Camera Type Flea 3-03S1 with ADVS ADVS Camera Delay Timing GPS - time inserted Video with frame analysis Missed Comments: _______________________________ Observer Rob Horvat Location Glenbrook, NSW, AU Longitude +150:37 Latitude -33:46 Altitude 199 m Datum WGS84 Telescope Newtonian Aperture 30 cm Seeing Steady Camera Type Visual Camera Delay Timing NTP Servers via iPhone app Disappearance 08:24:09.20 Reappearance 08:24:12.20 Comments: iPhone app used with time from NTP servers. Some cloud about to the west but seemed to be clear to the east where the target star was.