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comet 73P/SCHWASSMANN-WACHMANN 3 - 25 may 2017 - 09:15 UT

Photometric data obtained from FOCAS-II software

COD Q62

CON iTelescope.net - Siding Spring Observatory, Coonabarabran, NSW, Australia

CATALOG: USNO A2.0 / CMC 14-15 - BAND: R

                                   10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB   COD

COMET         UTC                    +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

------------  -------------------  -----  -----  -----  -----  -----  -----  ----  ----  ---

73P           25/05/2017 19:15:12  16.77  16.03  15.64  15.41  15.26  15.15   6.8  19.1  Q62

73P           25/05/2017 19:15:12*  0.08   0.07   0.06   0.09   0.10   0.12    12   3.4  CMC

0073Px        25/05/2017 19:14:54  17.13  16.12  15.57  15.28  15.14  15.05   2.7  19.1  Q62

0073Px        25/05/2017 19:14:54*  0.09   0.10   0.08   0.09   0.10   0.13    11   3.4  CMC

                                                                     AFRHO         LOG

COMET         UTC                   DELTA    r    BOX "   MAG   RSR    CM    +/-  AFRHO  OBS

------------  -------------------   -----  -----  -----  -----  ---  -----  ----  -----  ---

73P           25/05/2017 19:15:12    1.80   1.37  15.29  16.32    7     17     3  1.237  Q62

0073Px        Orbital elements not found

FoCAs 3.50

www.astrosurf.com/cometas-obs

es.groups.yahoo.com/group/Cometas_Obs

Astrometric data for MPC:

COD Q62

CON iTelescope.net - Siding Spring Observatory, Coonabarabran, NSW, Australia,

OBS E.Bryssinck

MEA E.Bryssinck

TEL 0.51-m f/4.5 Ritchey-Chretien + CCD

ACK MPCReport file updated 2017.05.26 08:50:39

AC2

NET CMC-15

0073P        KC2017 05 25.79865 01 13 28.45 -01 23 01.5          17.3 N      Q62

0073P        KC2017 05 25.80223 01 13 28.95 -01 22 58.9          17.2 N      Q62

0073P        KC2017 05 25.80580 01 13 29.43 -01 22 56.3          17.3 N      Q62

     73Px    KC2017 05 25.79865 01 13 27.84 -01 23 12.0          18.4 N      Q62

     73Px    KC2017 05 25.80223 01 13 28.36 -01 23 08.9          18.6 N      Q62

     73Px    KC2017 05 25.80580 01 13 28.98 -01 23 06.0          18.8 N      Q62

----- end -----

Erlier fragment 73PBt is more desintegrating, I have also the impression that fragmtne 73PBt is desintegrating in several parts. More images to stack are needed by the very low magnitu-de of the most bright fragment. But I can of course be wrong.  Therefore I assigned the most bright fragment as 73Px.