[BAA Comets] Recovery of P154 Brewington

[denis buczynski]

Hello all,
I asked the Pierre Laporte, the observer who has recovered this comet to write up the 
discovery/recovery circumstances for us.I always find these accounts interesting and inspiring, as 
it shows that amateurs can still make a significant contribution.
Denis Buczynski

Here is Pierre's reply

Hi Denis



Here is the circumstance of this rediscovery.



I (Pierre Laporte) try to image P/Brewington (104P) on the 1 august 2013 05:27 UT.  I use a refrator 
4" f/5.4 with an ST-402 ME.  Generally, I use 5 exposures of 120 seconds.  This attempt was a fail. 
By routine, I took a second try on 7 august 2013 at 03:46 UT.  After discussion with my neighbour 
observatory, Stéphane Potvin give a try also using his 12" with a ST-3000.  Stéphane Potvin took 46 
exposures of 120s beginning at 09:12 UT.  At the end, animation of images clearly show the comet 
tracking among the fixed stars....  I immediately check my five exposures to see the comet coma 
moving among the star field.  A third observatory, operated by Jean-François Viens, after having see 
the animation, point his 36" Dobson f/ 3,5 to the field located with CCD image and succeed to 
confirm visually the nature of the comet.  Jean-François Viens estimate his magnitude visually to 
17,5 with a DC = 4. On my picture, I get celestial coordinates using my pictures and register to the 
UCAC3 stars catalog to get precise celestial coordinates  We try to get an Internet connexsion via 
phone cell to send the information. We also  made a phone call to a fouth collegue, Clermont 
Vallière, who succeed to get picture of the comet.  The re-examination of pictures that I made on 
the 1 august reveal no trace of the comet......





Pierre Laporte

C.O.A.M.N.D.

Centre d'Observation Astronomique des Monts Notre-Dame