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OCCULTATION OF TYC 7505-00877-1 BY 751 Faina
2012 October 21


Two chords were recorded by John Broughton, using video OSD technique.

View the updated prediction.

Observers:
  1    J Broughton,Reedy Creek, QLD, AU
  2    J Broughton,Kingscliff, NSW, AU      (mobile)
  3(P) Prediction, Sep 27
        

Faina occultation - 2012 October 21

Discussion:

The circle above is plotted at the expected 130 km diameter of Faina. With two chords we can be confident of the path of Faina and that it was west of the predicted line.

The figure below shows the John's mobile Tangra light curve of the occultation.

Faina occultation - 2012 October 21 See note below re home station.

Observational Data:

Observation details for MP ( 751 ) Faina
By Star              TYC 7505-00877-1
On 2012-10-21  at 09:22:13.0

_______________________________

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     Steady Thick cloud > 2
Camera Type  WAT120N        PAL/CCIR
Camera Delay 0.09
Timing     GPS - time inserted Video with frame analysis
Disappearance  09:22:11.30
Reappearance   09:22:27.10
Comments: Unattended drift-through video integrating 4x to mitigate a
potential problem with cloud.
However, the mag-9.6 target was invisible at the critical time, having lost
all but 1% of its normal brightness level.
Attempts to process it in Tangra failed due to loss of tracking,
despite a mag -6.1 guiding star being visible throughout.
The occultation was then positively detected and times estimated after stacking
many captured frames in MaxIm DL (40 for D and 20 for R),
facilitated by the presence of a star of equal magnitude 8' to its west.

_______________________________

Observer   John Broughton
Location   Kingscliff, NSW, AU
Longitude  +153:34
Latitude   -28:15
Altitude   4 m
Datum      WGS84
Telescope Newtonian
Aperture   32 cm
Seeing     Steady Broken cloud
Camera Type  WAT120N        PAL/CCIR
Camera Delay 0.09
Timing     GPS - other linking Video with frame analysis
Disappearance  09:22:10.63
Reappearance   09:22:25.19
Comments:

        

Return to 2012 occultation results



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