Re: Herschel/Planck

From: RICHARD MILES (rmiles.btee@btinternet.com)
Date: Fri May 15 2009 - 18:36:52 UTC

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    I should add that a V filter was used for imaging, and the photometry of the 
    three objects yielded the following mean V magnitudes and standard 
    deviations in brightness for the objects on 2009 May 15.63 when they were at 
    a range of 226,000 km from the observatory at Siding Spring, Australia:
    
    Herschel:  15.16 +/- 0.22
    Planck:  16.54 +/- 0.55
    SYLDA:  17.02 +/- 0.03
    
    Absolute calibration was good to +/-0.03 mag.
    
    Cheers,
    Richard Miles,
    
    ----- Original Message ----- 
    From: "Gerhard HOLTKAMP" <grd.holtkamp@t-online.de>
    To: <SeeSat-L@satobs.org>
    Cc: "Jonathan McDowell" <jcm@head.cfa.harvard.edu>
    Sent: Friday, May 15, 2009 5:15 PM
    Subject: Re: Herschel/Planck
    
    
    On Friday 15 May 2009 14:53, Jonathan McDowell wrote:
    > If anyone does make observations of Herschel/Planck: Arianespace
    > tells me they don't have detailed orbits for the four objects
    > but that in order of apogee from lowest to highest they are
    > Planck, Herschel, SYLDA and ESC-A.
    >
    > It's not clear what the fate of the last two will be, so it would
    > be great if anyone got measurements...
    >
    
    The ESA Optical Ground Station in Tenerife has taken a series of pictures
    showing these objects. See the article
    
    http://www.esa.int/esaSC/SEM4SJZVNUF_index_0.html
    
    I don't know whether anyone has bothered to process them astrometrically 
    with
    regard to SYLDA and ESC-A.
    
    Gerhard HOLTKAMP
    Darmstadt, Germany
    
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