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Four Positive observations, Two with only one side were reported.
No clearly observed misses were recorded for this event.
View the updated prediction.
Observers:
1 D Gault,Benalla, Victoria, AU
2 T Barry,Werrington Downs, NSW,AU
3 J Bradshaw,Samford Valley,Qld,AU
4 J Broughton,Reedy Creek, QLD, AU
5(P) Prediction,April 23
Discussion:
The circle above is plotted at the 12239 km diameter of Venus.
With 2 full and 2 partial chords we can be confident of the path of Venus and that it was
close of the predicted line.
Significant sources of error include:
Venus' atmosphere causing gradual extinction.
The D event being on the brightly lit side of Venus.
Even against the dark side the R is difficult to see (see Jonathan Bradshaw's image below).
The low altitude (14 Deg or less) of the observations causing
local refraction and poor seeing.
So the circle has been plotted on the predicted path.
The figure below shows a Limovie frame and 3 D plot of Jonathan's R.
Observational Data:
Observation details for MP ( 0 ) Venus
By Star HIP HIP112961
On 2014-04-16 at 18:05:00.0
_______________________________
Observer Dave Gault
Location Benalla, Victoria, AU
Longitude +146:01
Latitude -36:32
Altitude 181 m
Datum WGS84
Telescope SCT including Cass and Mak
Aperture 20 cm
Seeing Strong flickering Clear
Camera Type Flea3-03S3 with ADVS ADVS
Camera Delay 0
Timing GPS - time inserted Video with frame analysis
Disappearance
Reappearance 18:05:02.80
Comments:
_______________________________
Observer Tony Barry
Location Werrington Downs, NSW,AU
Longitude +150:43
Latitude -33:44
Altitude 162 m
Datum WGS84
Telescope SCT including Cass and Mak
Aperture 25 cm
Seeing Strong flickering Clear
Camera Type Flea3-03S3 with ADVS ADVS
Camera Delay 0
Timing GPS - time inserted Video with frame analysis
Disappearance 17:58:20.00
Reappearance 18:05:03.10
Comments: Planet / star were just 14 degrees above the horizon and the seeing was very poor.
The air was bouncing around and I can say it's the worst seeing where I have ever
attempted an occultation recording.
_______________________________
Observer Jonathan Bradshaw
Location Samford Valley, Qld, Australia
Longitude +152:50
Latitude -27:22
Altitude 80 m
Datum WGS84
Telescope SCT including Cass and Mak
Aperture 36 cm
Seeing Strong flickering Clear
Camera Type G-Star PAL/CCIR
Camera Delay -0.04
Timing GPS - time inserted Video with frame analysis
Disappearance 17:59:09.21
Reappearance 18:05:17.53
Comments: Apalling seeing, but R very clear to within 2 frames.
D was largely obscured by bright limb, but likely to have happened within
15 seconds of last possible sighting.
https://www.youtube.com/watch?v=ZBEkCQF9BYA
_______________________________
Observer John Broughton
Location Reedy Creek, QLD, AU
Longitude +153:23
Latitude -28:06
Altitude 66 m
Datum WGS84
Telescope SCT including Cass and Mak
Aperture 25 cm
Seeing Strong flickering Clear
Camera Type LN-300-11673 PAL/CCIR
Camera Delay -0.05
Timing GPS - time inserted Video with frame analysis
Disappearance
Reappearance 18:05:16.50
Comments: The star emerged faintly 3s prior to the time stated
(75km lower in the Venusian atmosphere),
rising slowly in brightness before a more rapid ascent at the end.
Actual exposure setting was 1/120.
http://www.youtube.com/watch?v=Zzva-lY6t-c&feature=youtu.be