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Interstellar C/2019 Q4 Borisov - images so far.

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#1 happylimpet

happylimpet

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Posted 22 September 2019 - 01:02 PM

Been cursing the Leylandii trees to the east - after the comet clears them I have about 20 mins before the sky background starts to creep up and 30 before images are unuseable.

 

Nonetheless, Ive imaged it on a few nights this last week. Not hard - the only problem is stacking on an invisible object using my antiquated overlaying of Wikisky using HORIZONS coordinates with DSS, and clicking on my best guess as to the comet's position. Must get astrometrica - though Ive said that before.

 

The upshot is the alignment of these isnt to be trusted 100%, and is doubtless off by a few pixels, so the comet is probably elongated a little.

 

Dates are of dusk the night before, so technically should be one day later by the time the images were acquired.

 

12" f3.65, ASI1600MMc, Baader 610 longpass filter.

 

20190913

c2019q4-20190913-610-3_lflat_bin_crop_lflat-arrow_crop.jpg

 

20190916 (apparent tail is background galaxy)

c2019q4-20190916-610-2_lflat_sc_bincrop-arrow.jpg

 

20190917

c2019q4-20190917-610-3_sc_lflat_bin_crop_lflat.png

 

20190918

c2019q4-20190918-610-2_sc_bin_lflat_croplflat.jpg

 

20190919 (WITH SATELLITE GLINT)

c2019q4-20190919-610-2_lflat_bincrop_lflat.jpg


Edited by happylimpet, 22 September 2019 - 01:03 PM.

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#2 happylimpet

happylimpet

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Posted 22 September 2019 - 01:39 PM

Here's the data from the nights of the 17th, 18th and 19th, all superimposed. Total of 90-120mins or thereabouts.

 

Suggestion of a tail, or at least a coma elongated to the upper right. I find the false colour helpful for this sort of thing.

 

Twice the image scale of the previous lot.

 

c2019q4-20190917,18,19-610-binsum_upscale.jpg


Edited by happylimpet, 22 September 2019 - 01:40 PM.

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#3 happylimpet

happylimpet

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Posted 23 September 2019 - 08:33 AM

c2019q4-20190922-610-2_lflat_bin_crop-lflat.png

 

This morning - 52 mins of 10sec subs, just as before!

 

Getting brighter, and coma is showing more of a 'D' shape, hinting at the tail that I cant yet detect!


Edited by happylimpet, 23 September 2019 - 08:34 AM.

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