Images and flash pattern of Nanosail-D last night

From: Marco Langbroek (marco.langbroek@wanadoo.nl)
Date: Wed May 25 2011 - 11:13:26 UTC

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    Hi all,
    
    Last night I observed Nanosail-D (10-062L)putting on a nice bright show of flashes.
    
    Images, and brightness variation curves derived from two of them, can be seen here:
    
    http://sattrackcam.blogspot.com/2011/05/nanosail-d-spectacular-show-of-bright.html
    
    It initially was flashing rapidly at 1-3 flashes per second around culmination. 
    As it descended towards the S-SE, it became brighter (an easy naked-eye object, 
    reaching mag. +1) and the flashing appeared to become more regular and slowing 
    down, to a rate of about one flash per 1.6 seconds. It was just like it was 
    "winking" to the observer.
    
    Flash times derived from two images (out of 4: two other images have the trail 
    run out of the FOV due to too hasty aiming):
    
    24 May 2011
    image 4:
    18 flashes in 10.05s
    flash times (UTC):
    23:22:22.36
    23:22:23.02
    23:22:23.35
    23:22:23.96
    23:22:24.63
    23:22:25.00
    23:22:25.63
    23:22:26.24
    23:22:26.57
    23:22:27.20
    23:22:27.87
    23:22:28.81
    23:22:29.43
    23:22:29.81
    23:22:30.39
    23:22:31.01
    23:22:31.51
    23:22:32.03
    
    image 7:
    7 flashes in 10.05s
    trail near saturation
    flash times (UTC):
    23:23:42.60
    23:23:43.79
    23:23:45.47
    23:23:47.09
    23:23:48.72
    23:23:50.23
    23:23:52.02
    
    - Marco
    
    -----
    Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
    e-mail: sattrackcam@wanadoo.nl
    
    Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
    Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
    SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html
    Station (b)log: http://sattrackcam.blogspot.com
    -----
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