Astroblog

Saturday, November 04, 2017

Comet 96P/Machholz zooms past the sun


Single image of comet 96P Machholz from the SOHO LASCO C3 instrument on 27 October 2017. Click on any image to embiggen	Composte series of images as the comet swung around the sun fro 26-28 October. The gap is where some images were not taken	Animation of the same series.

Comet 96P/Machholz came to perihelion on October 27, unfortunately, it was too close to the sun for us Earth-bound observers, but fortunately a bevy of sun-observing spacecraft watched intently as it passed by. It was picked up by the Solar and Heliospheric Observatory (SOHO) and the Solar TErrestrial RElations Observatory Ahead (STEREO-A) spacecraft.

This visitation wasn't as spectacular as the one in 2002, but was very interesting nonetheless. Most importantly, high-resolution images from SOHO LASCO 3 showed the presence of 3 fragments.

Two of these fragments had been seen in the 2012 passage of the comet, the third was new.

You can read about the background to the comet, other observations and its fragmentation in far more detail at the excellent skyhunt blog (go now, you won't be disappointed, I'll wait).
I won't try and duplicate Trygve Prestgard's excellent work,I will just presnt my images from the STEREO spacecraft where I hunted for the fragments. Despite high resolution COR2A images, I found no fragments.


Comet 99P Macholz in the STEREO COR2 Imager on 26 October	Animation of 26 October images, note tail movement


Single image of STEREO COR2A from 28 October, 2017	Animation of 28 October images


Comet 96P Machholz in the STEREO H1A imager on 23 October (right down the bottom left) click to emggen	Animation of the comets brief sojourn in the H1A imager field of view

Labels: comet, comet 96P Machholz stereo astronomy, Soho, Stereo astronomy

# posted by Ian Musgrave @ 11:53 am 0 comments

Tuesday, April 17, 2007

Comart Machholz

More fun things you can do with the data from Stereo. These are images of comet 96P Machholz caught in the H1a camera of Stereo produced by Alan Watson. They have been processed in false colour to bring out come features of the coma and tail.

But they are also gorgeous to look at, true comart.

Labels: comet 96P Machholz stereo astronomy

# posted by Ian Musgrave @ 10:24 pm 0 comments