Three clearly observed misses were recorded for this event. One was video OSD and two were Visual.

View the updated prediction.

Observers:
  1(M) D Watson,Thornton near Whakatane, NZ
  2(M) J Broughton,Reedy Creek, QLD, AU
  3(M) P Anderson,THE GAP,Brisbane,QLD,AU
  4(P) Prediction
        

Discussion:

The circle above is plotted at the expected 46 km diameter of Erna. 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 (406) Erna
By Star              TYC 5527-00942-1
On 2013-04-18  at 10:01:56.0

_______________________________

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     Slight flickering Clear
Camera Type
Camera Delay
Timing     Tape Recorder + time signal Visual, no PE applied

Missed

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 0.11
Timing     GPS - time inserted Video with frame analysis

Missed

Comments:

_______________________________

Observer   Peter Anderson
Location   THE GAP,Brisbane,QLD,AU
Longitude  +152:55
Latitude   -27:27
Altitude   170 m
Datum      WGS84
Telescope Newtonian
Aperture   41 cm
Seeing     Steady Clear
Camera Type  Visual
Camera Delay 0
Timing     Tape Recorder + time signal Visual, PE applied

Missed

Comments: ID Positive. Nearby comparison star disappeared for 1.5secs from
10hrs 04m 01.7sec,(actual), but obviously spurious
because image 'fuzzed' a couple of times within 10 seconds of this time.
The subject star held solid. The 'blind spot' is suspected
plus the ancient eyes factor.