Two positive occultations was recorded, using Video technique.

One clearly observed miss was recorded for this event.

View the updated prediction.

Observers:
  1    T Barry,Linden Obs, Blue Mts,NSW,AU  
  2    D Gault,Kuriwa Observatory, NSW, AU  
  3(M) D Herald,Murrumbateman, NSW, AU      
  4(P) Prediction, 12 Nov                   


        

Discussion:

The ellipse above is plotted at the maximum axis ratio as determined by lightcurve inversion data. With two close by chords and one constraining miss we can be confident of the path of Alauda and that it was south of the predicted line.

The figure below shows the AOTA analysis of the Tangra light curve of Dave Herald's observation.

The figure below shows the Tangra light curve of Dave Gault's occultation.

The figure below shows the AOTA analysis of the Tangra light curve of Tony Barry's occultation.

Observational Data:

Observation details for MP ( 702 ) Alauda
By Star              HIP HIP13832
On 2014-12-18  at 14:15:40.0

_______________________________

Observer   Tony Barry
Location   Linden Observatory, Blue Mountains
Longitude  +150:29
Latitude   -33:42
Altitude   577 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   25 cm
Seeing     Steady Clear other - list in comments
Camera Type  Flea3-03S3 with ADVS         ADVS          
Camera Delay 0
Timing     GPS - time inserted Video with frame analysis
Disappearance  14:15:48.12
Reappearance   14:16:02.16
Comments: Very close to the horizon - about 6 degrees altitude.
 The disappearance and reappearance were not instantaneous. 
Please review the LC file to form your own opinion. 
LC file and screen shots attached.

_______________________________

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   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  14:15:47.10
Reappearance   14:16:01.10
Comments:    

_______________________________

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     Strong flickering Clear wind
Camera Type  WAT910BD       PAL/CCIR      
Camera Delay -0.02
Timing     GPS - time inserted Video with frame analysis

Missed

Comments:  Lightcurve from 14:15:00 to 14:17:26 by Tangra v3.1.15 
using AperturePhotometry/AverageBackground. 
Analysis by AOTA v4.1.4.0. 
Report prepopulated by IOTA Reporting Add-in for OW ver.1.8