Four clearly observed misses were recorded for this event.

View the updated prediction.

Observers:
  1(M) D Lowe,Brisbane,QLD,AU
  2(M) P Anderson,THE GAP,Brisbane,AU
  3(M) D Watson,Thornton near Whakatane,NZ
  4(M) J Bradshaw,Samford,QLD,AU
  5(P) Prediction, 3 Oct

    

Discussion:

This obseravtion was of particular interest as the star is a know close double with last measured separation from 2005 of just over 2 milli arcseconds.
The circle above is plotted at the expected 256 km diameter of Euphrosyne.
With no positive chords we cannot say where the actual path was, so the circle has been plotted on the predicted path.

Observational Data:

Observation details for MP (31) Euphrosyne
By Star              HIP HIP107779
On 2010-11-05  at 10:59:34.0

_______________________________

Observer   Dennis Lowe
Location   Brisbane,QLD,AU
Longitude  +153:06
Latitude   -27:30
Altitude   40 m
Datum      WGS84
Telescope Refractor
Aperture   10 cm
Seeing     Steady Clear
Camera Type
Camera Delay
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: Used WAT120N+ camera and 0.6X focal reducer integrating at slow 6,
medium gain and gamma set to high.

_______________________________

Observer   Peter Anderson
Location   THE GAP,Brisbane,AU
Longitude  +152:55
Latitude   -27:27
Altitude   170 m
Datum      WGS84
Telescope Newtonian
Aperture   41 cm
Seeing     Steady Clear
Camera Type
Camera Delay
Timing     Tape Recorder + time signal Visual, PE applied

Missed

Comments: Identification positive. Seeing steady.
Sky was bright and somewhat milky following much cloud and showers during the day.
There were definitely no events.
The star was very bright and reasonably steady. Asteroid not seen.

_______________________________

Observer   Diana Watson
Location   Thornton near Whakatane,NZ
Longitude  +176:51
Latitude   -37:55
Altitude   3 m
Datum      Other
Telescope SCT including Cass and Mak
Aperture  200 cm
Seeing     Steady Clear
Camera Type
Camera Delay
Timing     Tape Recorder + time signal Visual, no PE applied

Missed

Comments: Could see asteroid well before joining and well after separating but
brightness of the star hid the asteroid when it was near it.

_______________________________

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 Broken cloud
Camera Type
Camera Delay
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: