2019-11-15, 08:43 PM
(This post was last modified: 2019-11-15, 08:44 PM by theskyhound.)
Hello,
I believe that the first interstellar comet may soon be observable visually in larger amateur instruments. This conclusion is based on recent magnitude and coma diameter measurements from images. To the best of my knowledge nobody has yet detected it visually, but of course the moon has been interfering. My calculations indicate that as soon as November 21 we should be able to get a good look at it, and it may be visible in apertures as small as 8-inches (under a dark sky and to an experienced observer). It should be visible in a 16-inch or larger scope.
It will be in Leo and available in the hours before sunrise from most locations. I plan to have a go at it in my 18-inch Dob.
I have added 2I/Borisov to the the SkyTools 3 current comets list. The "I" designation is not yet supported in SkyTools 3 (thought I'd have a little more time before an interstellar comet came along!) so it is listed as C/2019 Q4 (2I Borisov) for the time being. As soon as a visual observation is posted I will update the Current Comets list with more accurate magnitude, coma diameter, and degree of concentration data, which will allow for more accurate visual difficulty estimates.
I believe that the first interstellar comet may soon be observable visually in larger amateur instruments. This conclusion is based on recent magnitude and coma diameter measurements from images. To the best of my knowledge nobody has yet detected it visually, but of course the moon has been interfering. My calculations indicate that as soon as November 21 we should be able to get a good look at it, and it may be visible in apertures as small as 8-inches (under a dark sky and to an experienced observer). It should be visible in a 16-inch or larger scope.
It will be in Leo and available in the hours before sunrise from most locations. I plan to have a go at it in my 18-inch Dob.
I have added 2I/Borisov to the the SkyTools 3 current comets list. The "I" designation is not yet supported in SkyTools 3 (thought I'd have a little more time before an interstellar comet came along!) so it is listed as C/2019 Q4 (2I Borisov) for the time being. As soon as a visual observation is posted I will update the Current Comets list with more accurate magnitude, coma diameter, and degree of concentration data, which will allow for more accurate visual difficulty estimates.
Clear skies,
Greg
Head Dude at Skyhound
Greg
Head Dude at Skyhound