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Three positive and seven negative observations were recorded for this event on a magnitude 9.8 star by a well coordinated group across NSW and ACT, Australia.
View the updated prediction.
Observers: 1 Dave Gault, Hawkesbury Heights, NSW, AU 2 Dave Gault, Penrith Lakes, NSW, AU 3 Dave Herald, Yass, NSW, AU 4 J Blank, Yass, NSW, AU 5 Predicted path 6 Ron Ziemiecki, Prospect, NSW, AU 7 Hristo Pavlov, Marsfield, NSW, AU 8 Albert Brakel, Downer ACT, AU 9 Ted Dobosz,Bankstown, NSW, AU 10 Patrick Purcell,Murrumbateman, NSW, AU 11 Dave Herald,Kambah, ACT, AU Dave Gault and Dave Herald each had unattended 2nd sites running.
Discussion:
The plot above shows the best fit ellipse for the 3 measured chords. It has axis dimensions of 44.3 by 64.3 km. The area of the ellipse, 8948 sq km, compares well to published diameter of 52 km for Lova giving an area of 8494 sq km.
The times observed were about 12 seconds later than predicted and the path was about 40 km South of the predicted centre line.
Observational Data:
Observer D Herald Location Kambah, ACT, AU Longitude +149:03:49. Latitude -35:23:49.3 Altitude 584 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 34 cm Seeing Steady Clear Timing GPS - other linking Video with frame analysis Disappearance 17:41:01.00 Reappearance 17:41:03.57 Comments: _______________________________ Observer Ted Dobosz Location Bankstown NSW Longitude +151:01:44.7 Latitude -33:55:55.4 Altitude 31 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 28 cm Seeing Slight flickering Clear Timing GPS - time inserted Video with frame analysis Disappearance 17:40:45.17 Reappearance 17:40:46.53 Comments: _______________________________ Observer Patrick Purcell Location Murrumbateman, NSW Longitude -148:59:51.3 Latitude -34:57:49.2 Altitude 605 m Datum WGS84 Telescope Newtonian Aperture 40 cm Seeing Steady Clear Timing GPS - other linking Visual, no PE applied Disappearance 17:40:57.80 Reappearance 17:41:00.80 Comments: _______________________________ Observer J Blank Location Yass, NSW, AU Longitude +148:50:24. Latitude -34:47:8. Altitude 520 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 20 cm Seeing Timing GPS - time inserted Video with frame analysis Missed Comments: _______________________________ Observer Dave Gault Location Penrith Lakes Longitude +150:41:35.8 Latitude -33:42:5.6 Altitude 53 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 20 cm Seeing Timing GPS - time inserted Video with frame analysis Missed Comments: Station B _______________________________ Observer Dave Gault Location Hawkesbury Heights Longitude +150:38:27.8 Latitude -33:39:52. Altitude 286 m Datum WGS84 Telescope Newtonian Aperture 25 cm Seeing Timing GPS - time inserted Video with frame analysis Missed Comments: Station A -Telescope prepointed 22 hours before event. VCR was started about 1 hour before the event and telescope unattended while observer setup another station. _______________________________ Observer D Herald Location Yass, NSW, AU Longitude +148:50:19. Latitude -34:43:19. Altitude 597 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 20 cm Seeing Steady Clear Timing GPS - other linking Video with frame analysis Missed Comments: _______________________________ Observer Ron Ziemiecki Location Prospect, NSW, Australia Longitude +150:55:13.3 Latitude -33:47:51.8 Altitude 70 m Datum WGS84 Telescope Refractor Aperture 15 cm Seeing Steady Clear Timing Tape Recorder + time signal Visual, standard PE applied Missed Comments: This was my first solo Occultation, however I have assisted previously on a Lunar Occultation. I will be more active and hope to get a positive in the near future. Best wishes. _______________________________ Observer Hristo Pavlov Location Marsfield Longitude +151:06:11.4 Latitude -33:46:13.6 Altitude 113 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 20 cm Seeing Timing GPS - time inserted Video with frame analysis Missed Comments: Video record is from 17:20 to 17:43, the part analyzed in Limovie is from 17:39 to 17:43 _______________________________ Observer Albert Brakel Location Parking area, hwys jn, ~10 km E of Yass Longitude +149:00:49. Latitude -34:50:17. Altitude 597 m Datum WGS84 (from Google Earth) Telescope SCT including Cass and Mak Aperture 20 cm Seeing Steady Clear Timing Beeper box, synchronized by D. Herald + Tape Recorder + time signal Visual, no PE applied Missed Comments: : Beeper box fall caused 20 spurious seconds to be inserted at that point. This has been taken into account. _______________________________ All in all a very good team effort which emphasises the importance of having a good sized team and including a few outlier stations if possible.
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