Comet 45P is crossing STEREO HI2A imager showing tail dynamics. This sequence is across four days. It will get bigger and brighter as the comet will pass approx 0.18au from STEREO A.
Image data courtesy of STEREO/SECCHI/NASA.
The tail extends and becomes more dynamic in images over the 09/23-30.
Several CME plumes are passing by.
The big picture,