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OCCULTATION OF UCAC2 33688276 BY 319 Leona
2010 October 22


A 4.16 second occultation was recorded by Jonathan Bradshaw, using video- OSD technique.

View the updated prediction.

Observers:
  1    J Bradshaw,Samford,QLD,AU            
  2(M) J Broughton,Eagleby, QLD,AU          
  3(M) J Broughton,Reedy Creek, QLD,AU      
  4(P) Prediction  Oct 4

    

Leona occultation - 2010 October 22

Discussion:

The circle above is plotted at the expected 81 km diameter of Leona. With one chord and a contraining observation it is possible to sure that Jonathan was south of the central line of the event as shown. Long term lightcurve data suggests that Leona has a maximum axis ratio of only 1.03 which would if not enough to allow ambiguity.

The figure below shows the Tangra light curve of the occultation as observed by Jonathan.

[mp] occultation - [ldate]

Observational Data:

Observation details for MP (319) Leona
By Star              UCAC2 33688276
On 2010-10-22  at 12:22:13.0

_______________________________

Observer   Jonathan Bradshaw
Location   Samford,QLD,AU
Longitude  +152:50
Latitude   -27:22
Altitude   80 m
Datum      WGS84
Telescope Newtonian
Aperture   36 cm
Seeing     Steady Clear
Camera Type
Camera Delay 120mS
Timing     GPS - time inserted Video with frame analysis
Disappearance  12:22:10.49
Reappearance   12:22:14.65
Comments: Clear event despite full Moon near by I have subtracted 120ms which is
my estimate of the camera lag, but the margin of error may be as high as +/- 120ms


_______________________________

Observer   John Broughton
Location   Reedy Creek, QLD
Longitude  +153:23
Latitude   -28:06
Altitude   66 m
Datum      WGS84
Telescope Newtonian
Aperture   51 cm
Seeing     Steady Clear
Camera Type
Camera Delay
Timing     other Drift scan

Missed

Comments:

_______________________________

Observer   John Broughton
Location   Eagleby, QLD
Longitude  +153:12
Latitude   -27:41
Altitude   5 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   25 cm
Seeing     Steady Clear
Camera Type
Camera Delay 340ms
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: Watec 120N+ at 8x


    

Return to 2010 occultation results



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