A 2.08 second occultation was recorded by Dennis Lowe, using video OSD technique.

View the updated prediction.

Observers:
  1    D Lowe,Brisbane, QLD,AU
  2(M) J Broughton,Reedy Creek, QLD, AU
  3(P) Prediction, 22 May


        

Discussion:

The circle above is plotted at the expected 15 km diameter of Dalera. With only one chord it is not possible to determine whether Dennis was north or south of the central line of the event. However, assuming the updated prediction was approximately correct the longer than expected chord of about 21 km would suggest that the chord might lie close to the central portion of the asteroid.

The figure below shows the Limovie/Tangra light curve of the occultation.

Observational Data:

Observation details for MP ( 1511 ) Dalera
By Star              TYC 6842-01867-1
On 2012-06-15  at 15:01:00.0

_______________________________

Observer   Dennis Lowe
Location   Brisbane, QLD,AU
Longitude  +153:06
Latitude   -27:30
Altitude   39 m
Datum      WGS84
Telescope Refractor
Aperture   10 cm
Seeing     Slight flickering Clear
Camera Type  WAT120N+       PAL/CCIR
Camera Delay 0.07
Timing     GPS - time inserted Video with frame analysis
Disappearance  15:01:45.31
Reappearance   15:01:47.39
Comments:

_______________________________

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 Clear
Camera Type  WAT120N        PAL/CCIR
Camera Delay 0.03
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: