Flashing Topex Poseidon (1992-52A) on a 12.17 sec period (still shortening)

From: Alain Figer <alain.figer_at_club-internet.fr>
Date: Sun, 6 Apr 2014 18:15:49 +0200 (CEST)
The photometric period of Topex Poseidon (1992-52A) goes on shortening. 

According to PPAS, its period has been measured of about : 

. 32 to 24 seconds during 2008 

. 23 to 19 sec during 2009 

. 19 to 16.5 sec during 2010. 



Bram Dorreman measured the period at 13.72 sec on 6 (to 7) July 2012 (a result issued on the SeeSat-L). 

As for me, I derived photographically an accurate period of : 

. 13.57 sec on 14 September 2012 

. 12.17 sec on 9 March 2014. 

On 9 March 2014, the photos were taken between18h48-50 UT and the light curve showed : 

. bright long maxima (primaries) 

. bright short maxima (secondaries) 

. 2 additional flashes during the course of a period (one of both being extremely brief and very bright). 



Alain Figer 

48.67 N ; 2.13 E ; 170 m a.s.l. 

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Received on Sun Apr 06 2014 - 11:16:49 UTC

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