C/2019 Y4 (ATLAS)

spectrum comet C/2019 Y4 (ATLAS)

Submitted by astrobry on Fri, 04/24/2020 - 10:01

The spectrum of comet C/2019 Y4 (ATLAS) taken with an ALPY600 spectrograph (R=600) and a newton 0.4-m f/4 telescope shows the different emission lines of this comet. There is a clear peak around 3880 Angstrom and then the different swan bands. There were 5 images of 20 min each that were processed/calibrated in BASS software. The instrument response was performed with the star HD55575 from the Miles catalogue and was close to the comet.

C/2019 Y4 ATLAS 2020/03/29 rolando

Submitted by adrianov on Sun, 04/19/2020 - 18:32

C/2019 Y4 ATLAS 2020/04/16 valvasori

Submitted by adrianov on Sat, 04/18/2020 - 21:23

C/2019 Y4 (ATLAS): a split comet

Submitted by milani on Thu, 04/16/2020 - 13:58

Evolution of C/2019 Y4 fragmentation

Submitted by milani on Sun, 04/12/2020 - 09:35

Images taken with the 80 cm f/4 telescope of the Celado Observatory (Italy) - Giancarlo Favero and Mauro Facchini

Comet C/2019 Y4 (ATLAS) on 8 april

Submitted by astrobry on Thu, 04/09/2020 - 07:35

comet is still fading, m1=14.8 (@ radius of 5 arcsec) according UCAC-4 catalog. Also Af(ro) parameter is stil descending. No central condensation visible anymore.