Re: [BAA Comets] C/2019 Y4 (ATLAS) new fragment
Thomas Lehmann 03 May 2020 20:02 UTC
Hi Nick,
thanks for sharing your animation. To me it looks now rather obvious that the
bright spot in front of the main comet is related to it, despite there is no
simple explaination why it has moved that far without prior detection. So, lets
wait for possible confirmation images ...
Unfortunately I will not have time to process my images until tomorrow and weather
forecast is not really good for the next two nights.
Cheers,
Thomas
> Am Sun, 3 May 2020 08:34:27 +0100
> schrieb Nick James <ndj@nickdjames.com>:
>
> Hi Thomas,
>
> I'll be very interested to see your observations but this feature wasn't
> visible on my images taken on May 1st.
>
> The stacks I used for astrometry are here in an animated GIF:
>
> http://www.nickdjames.com/Comets/2020/2019y4_20200502_ndj.gif
>
> Each of these is 15 minutes long so the star trails are around 26
> arcsec. The object is the faint dot moving with the comet around 22
> arcsec ahead of it.
>
> Nick.
>
>
>
> On 03/05/2020 08:25, Thomas Lehmann wrote:
> >
> > Hi Nick,
> >
> > I still have to reduce my imaging from May 1st ...
> > I'd suggest that you could split your session in two parts and create stacks
> > on the comet separately. This could help verifying if the fragment in question
> > is real or maybe a cosmic in on of your images or something else.
> >
> > Best regards,
> > Thomas
> >
> >> Am Sat, 2 May 2020 23:34:45 +0100
> >> schrieb Nick James <ndj@nickdjames.com>:
> >>
> >> This comet continues to do interesting things!
> >>
> >> My image tonight shows a new fragment 20 arcsec west and 9 arcsec south
> >> of the the main nucleus (component B). The new fragment is around mag
> >> 18.8. The residual nucleus, component B, is currently around magnitude
> >> 15.2. An image showing the fragment is here:
> >>
> >> http://www.nickdjames.com/Comets/2020/2019y4_20200502_2124_ndj.jpg
> >>
> >> Has anyone else imaged this?
> >>
> >> Nick.
> >>
> >>
> >>
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