[BAA Comets] Two outbursts of Comet 29P/S-W1 in quick succession

[Richard Miles]

Comet 29P has outburst again, just 5.5 days or so since its last outburst. 
First detected by Jean-Francois Soulier (A. Maury, J.-B. de Vanssay) from 
SpaceObs (W96), Chile:

0029P C2017 06 27.45029 21 40 09.67 -13 19 24.1 16.27N F65
0029P C2017 06 28.19032 21 40 00.14 -13 19 30.1 15.21N W96

Date of outburst: 2017 06 27.82 +/-0.30

European observers may have caught the outburst a little earlier than 
Jean-Francois on the night of June 27/28.

There have now been 5 outbursts during the present apparition. 
Interestingly, this one has taken place 116 days since the first outburst of 
this observing season. That equates to exactly 2.00 solar days on the 
nucleus according to my calculations. It also appears that the present event 
may have been triggered by that of June 22.32 +/-0.18.

We shall now have to see if the outburst coma develops in a similar way to 
that of the first event (March 04).

Richard Miles
BAA