29P S-W1   2017

New Outburst  : +0.9mag

COD W96
OBS A. Maury, J.-B. de Vanssay, J.-F. Soulier
MEA J.-F. Soulier
TEL 0.4-m f/5.2 Ritchey-Chretien + CCD
NET UCAC-4
0029P         C2017 12 21.01052 21 28 08.89 -12 29 41.3          16.1 N      W96
0029P         C2017 12 21.02079 21 28 09.27 -12 29 39.2          16.2 N      W96
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New Outburst  : +1.6mag

COD W96
OBS A. Maury, J.-B. de Vanssay, J.-F. Soulier
MEA J.-F. Soulier
TEL 0.4-m f/5.4 Ritchey-Chretien + CCD
NET UCAC-4
0029P         C2017 10 03.06213 21 04 41.45 -14 47 23.5          16.05N      W96
0029P         C2017 10 03.10627 21 04 41.13 -14 47 23.4          15.99N      W96
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No filter

COD W96
OBS A. Maury, J.-B. de Vanssay, J.-F. Soulier
MEA J.-F. Soulier
TEL 0.4-m f/5.4 Ritchey-Chretien + CCD
NET UCAC-4
0029P        KC2017 10 02.10899 21 04 48.32 -14 47 21.7          16.5 N      W96
0029P        KC2017 10 02.15153 21 04 47.98 -14 47 22.6          16.5 N      W96
----- end -----

Filter Rc

New Small Outburst  : +0.6mag

New Small Outburst : +0.4mag.

New Small Outburst

New Outburst 

New Outburst 

Outburst

Small Outburst 

New Outburst 

For the very first time the onset and development of an outburst of
enigmatic comet 29P/Schwassmann-Wachmann has been captured thanks to
independent observations by Jean-François Soulier and Juan Jose Gonzalez
Diaz on 2017 July 02. Details can be found on the BAA webpage:

https://www.britastro.org/node/10684

That BOTH observers were carrying out a time-series of CCD images at the
SAME time is an amazing coincidence especially when it is realised that this
is only the SECOND such strong outburst so far during 2017 and that such an
event is more or less over and done within a time-window of about one hour!

29P was discovered 90 years ago and at last we have some hard data showing
the onset of an outburst event. The beginning of the outburst is very sudden
and, as such, it is clearly a singular event reminiscent of a cryovolcanic
eruption at the nucleus. Analysis of the form of the rising lightcurve
should provide some valuable insight into this possibility.

The actual event was also the third very significant outburst within less
than 10 days and it is likely that the all three are inter-related in some
way, e.g. the first event triggered the second, which triggered the third.
Since the July 2nd event, a fourth outburst has also taken place just 3.5
days later! See Figure 3 at the above URL to see an example of the
photometric lightcurve these past 45 days.

Extremely well done Jean-François and Juanjo.

Congratulations,
Richard Miles
BAA

New small Outburst 

COD W96
OBS A. Maury, J.-B. de Vanssay, J.-F. Soulier
MEA J.-F. Soulier
TEL 0.4-m f/5.4 Ritchey-Chretien + CCD
NET UCAC-4
0029P         C2017 06 30.20503 21 39 32.47 -13 19 56.6          15.7 N      W96
0029P         C2017 06 30.22832 21 39 32.12 -13 19 57.1          15.6 N      W96
0029P         C2017 06 30.25239 21 39 31.76 -13 19 57.5          15.6 N      W96
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COD W96
OBS A. Maury,  J. B. Vanssay, J.F. Soulier
MEA J.F. Soulier
TEL 0.4-m f/5.4 Ritchey-Chretien + CCD
NET UCAC-4
0029P         C2017 06 26.18084 21 40 25.30 -13 19 15.7          16.3 N      W96
0029P         C2017 06 26.24047 21 40 24.54 -13 19 16.7          16.3 N      W96
0029P         C2017 06 26.30077 21 40 23.79 -13 19 17.6          16.3 N      W96
----- end -----

COD W96
OBS A. Maury,  J. B. Vanssay, J.F. Soulier
MEA J.F. Soulier
TEL 0.4-m f/5.4 Ritchey-Chretien + CCD
NET UCAC-4
0029P         C2017 06 25.18725 21 40 36.82 -13 19 12.5          16.1 N      W96
0029P         C2017 06 25.23225 21 40 36.30 -13 19 12.5          16.0 N      W96
0029P         C2017 06 25.29319 21 40 35.52 -13 19 12.4          16.0 N      W96
----- end -----

New small outburst

New Outburst

COD W96
OBS A. Maury, J.-B. de Vanssay, J.-F. Soulier
MEA J.-F. Soulier
TEL 0.4-m f/8 Ritchey-Chretien + CCD
NET UCAC-4
0029P        KC2017 03 14.38667 21 08 14.33 -17 05 38.9          16.73N      W96
0029P        KC2017 03 14.38667 21 08 14.33 -17 05 38.9          16.2 N      W96
0029P        KC2017 03 14.40773 21 08 15.24 -17 05 37.1          16.69N      W96
0029P        KC2017 03 14.40773 21 08 15.24 -17 05 37.1          16.7 N      W96
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