Monday, May 25, 2020

New Comet C/2020 K3 (Leonard)

CBET 4782 & MPEC 2020-K159, issued on 2020, May 25, announce the discovery of a comet (magnitude ~18) by G. J. Leonard on images taken on May 22 UT with the Catalina Sky Survey's 0.68-m Schmidt reflector. The new comet has been designated C/2020 K3 (Leonard).

We performed follow-up measurements of this object while it was still on the PCCP webpage.

Stacking of 20 unfiltered exposures, 55 seconds each, obtained remotely on 2020, May 23.4 from H06 (iTelescope network)  through a 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer, shows that this object is a comet with a diffuse irregular coma about 15" in diameter

Our confirmation image (click here for a bigger version)



MPEC 2020-K159, assigns the following preliminary parabolic orbital elements to comet C/2020 K3 (Leonard): T 2020 June 01.00; e= 1.0; Peri. =  64.49; q = 1.58;  Incl.= 129.01

By Ernesto Guido & Adriano Valvasori

Friday, May 15, 2020

New Comet P/2019 LM4 (Palomar)

CBET 4775 & MPEC 2020-J68, issued on 2020, May 14, announce that an apparently asteroidal object discovered on images taken at Palomar on 2019 June 4 and 7 with the 1.2-m f/2.4 Schmidt telescope (and given the minor-planet designation 2019 LM_4 when published on MPS 1001527, along with observations made elsewhere on June 8) has been re-discovered showing cometary appearance at two other observatories. The new comet has been designated P/2019 LM4 (Palomar).

According to the CBET 4775: B. Li reported the discovery by G. Zhaori of an extended object on images taken by L. F. Hu with the 1.04-m f/1.8 Schmidt telescope at the XuYi Station of Purple Mountain Observatory on May 11 UT in the course of the "Chinese Near Earth Object Survey" (discovery observations tabulated below).  Before the object was posted on the Minor Planet Center's NEOCP webpage, it wasdiscovered independently in images obtained with the Pan-STARRS1 1.8-m Ritchey-Chretien reflector at Haleakala on May 12, with Y. Ramanjooloo (University of Hawaii) reporting that the full-width-at-half-maximum size was 3".6 compared to 1".2 for nearby stars.  Observations were subsequently identified at the Minor Planet of yet another apparent independent discovery of the comet from 2020 May 9.5 at mag 16.4-17.0 with a 0.5-m f/2 Schmidt reflector at Haleakala, Hawaii, in the course of the "Asteroid Terrestrial- Impact Last Alert System" (ATLAS) search program, though it appears that the ATLAS team did not report it as a comet.

We performed follow-up measurements of this object while it was still on the PCCP webpage.

Stacking of 14 unfiltered exposures, 120 seconds each, obtained remotely on 2020, May 13.2 from X02 (Telescope Live, Chile) through a 0.6-m f/6.5 astrograph + CCD, shows that this object is a comet with a compact round coma about 15" in diameter (Observers E. Guido, M. Rocchetto, E. Bryssinck, M. Fulle, G. Milani, C. Nassef, G. Savini).

Stacking of 16 unfiltered exposures, 60 seconds each, obtained remotely on 2020, May 13.4 from H06 (iTelescope, New Mexico) through a 0.50-m f/4.5 astrograph + CCD, shows that this object is a comet with a compact coma about 12" in diameter (Observers A. Valvasori & E. Guido).

Our confirmation images (click here for a bigger version)






MPEC 2020-J68, assigns the following elliptical elements to comet P/2019 LM4 (Palomar): T 2019 June 18.24; e= 0.58; Peri. =  68.37; q = 2.37;  Incl.= 36.39

by Ernesto Guido

Thursday, May 7, 2020

New Comet C/2020 J1 (SONEAR)

CBET 4769 & MPEC 2020-J37, issued on 2020, May 04, announce the discovery of a comet (magnitude ~17) on images taken with a 0.28-m f/2.2 astrograph of the "Southern Observatory for Near Earth Research" (SONEAR) at Oliveira, Brazil, on May 1 . The new comet has been designated C/2020 J1 (SONEAR).

We performed follow-up measurements of this object while it was still on the PCCP webpage.

Stacking of 8 unfiltered exposures, 90 seconds each, obtained remotely on 2020, May 04.3 from X02 (Telescope Live, Chile) through a 0.6-m f/6.5 astrograph + CCD, shows that this object is a comet with a compact coma about 5" in diameter.

Our confirmation image (click here for a bigger version)



MPEC 2020-J37, assigns the following preliminary parabolic orbital elements to comet C/2020 J1 (SONEAR): T 2021 Apr. 15.73; e= 1.0; Peri. =  344.44; q = 3.25;  Incl.= 142.16

By Ernesto Guido & Adriano Valvasori

Tuesday, May 5, 2020

New Comet C/2020 H6 (ATLAS)

CBET 4768 & MPEC 2020-J23, issued on 2020, May 03, announce the discovery of a comet (magnitude ~18.5) on individual images from taken on Apr. 22 UT with a 0.5-m f/2 Schmidt reflector at Haleakala, Hawaii, in the course of the "Asteroid Terrestrial-Impact Last Alert System" (ATLAS) search program. The new comet has been designated C/2020 H6 (ATLAS).

We performed follow-up measurements of this object while it was still on the PCCP webpage.

Stacking of 10 unfiltered exposures, 120 seconds each, obtained remotely on 2020, April 28.4 from Q62 (iTelescope network) through a 0.50-m f/6.8 astrograph + CCD + focal reducer, shows that this object is a comet with a compact coma about 10" in diameter slightly elongated toward PA 330.

 Our confirmation image (click on it for a bigger version)

 


MPEC 2020-J23, assigns the following preliminary parabolic orbital elements to comet C/2020 H6 (ATLAS): T 2021 Oct. 1.29; e= 1.0; Peri. =  20.53; q = 4.68;  Incl.= 79.83


by Ernesto Guido & Adriano Valvasori

Wednesday, April 29, 2020

New Comet C/2020 H2 (Pruyne)

CBET 4761 & MPEC 2020-H220, issued on 2020, April 28, announce the discovery of a comet (magnitude ~16.5) by Theodore A. Pruyne on four 30-s CCD exposures taken with the Catalina Sky Survey's 0.68-m Schmidt telescope. The new comet has been designated C/2020 H2 (PRUYNE).

We performed follow-up measurements of this object while it was still on the PCCP webpage.

Stacking of 55 unfiltered exposures, 10 seconds each, obtained remotely on 2020, April 27.4 from X02 (Telescope Live, Chile) through a 0.6-m f/6.5 astrograph + CCD, shows that this object is a comet with a diffuse coma about 1' arcmin in diameter.

Our confirmation image (click on it for a bigger version)




MPEC 2020-H220, assigns the following preliminary parabolic orbital elements to comet C/2020 H2: T 2020 Apr. 27.62; e= 1.0; Peri. =  26.76; q = 0.83;  Incl.= 125.04


by Ernesto Guido, Marco Rocchetto & Adriano Valvasori

Friday, April 17, 2020

New Comet P/2020 G1 (Pimentel)

CBET 4754 & MPEC 2020-H06, issued on 2020, April 17, announce the discovery of a comet (magnitude ~15) by Eduardo Pimentel on CCD images taken by Jacques, Pimentel, and J. Barros with a 0.28-m f/2.2 astrograph of the "Southern Observatory for Near Earth Research" (SONEAR) at Oliveira, Brazil. The new comet has been designated P/2020 G1 (Pimentel).
 
We performed follow-up measurements of this object while it was still on the PCCP webpage.

Stacking of 7 unfiltered exposures, 24 seconds each, obtained remotely on 2020, April 15.4 from Q62 (iTelescope network) through a 0.50-m f/6.8 astrograph + CCD + focal reducer, shows that this object is a comet with a compact coma about 15" in diameter and a tail 20" long in PA 90.

Our confirmation image (click on it for a bigger version)



MPEC 2020-H06, assigns the following very preliminary elliptical elements to comet  P/2020 G1: T 2020 March 17.82; e= 0.87; Peri. =  208.93; q = 0.51;  Incl.= 18.67


by Ernesto Guido & Adriano Valvasori

Monday, April 13, 2020

New Comet C/2020 F8 (SWAN)

CBET 4750 & 4752 & MPEC 2020-G94, issued on 2020, April 13, announce the discovery of a comet (total magnitude ~8.5) by M. Mattiazzo in the low-resolution public website hydrogen Lyman-alpha images obtained with the Solar Wind Anisotropies (SWAN) camera on the Solar and Heliospheric Observer (SOHO) spacecraft.  The new comet has been designated C/2020 F8 (SWAN).
 
We performed follow-up measurements of this object while it was still on the PCCP webpage through the Telescope Live network.

Stacking of 3 unfiltered exposures, 30 seconds each, obtained remotely on 2020, April 11.4 from X02 (Telescope Live, Chile) through a 0.6-m f/6.5 astrograph + CCD, shows that this object is a comet with a compact coma about 5' in diameter and a tail 6' long in PA 220. Total magnitude 8.4.

Stacking of 3 unfiltered exposures, 120 seconds each, obtained remotely on 2020, April 11.7 from Q56 (Telescope Live, Australia) through a 0.1-m f/3.6 astrograph + CCD, shows that this object is a comet with a compact coma about 8' in diameter and a tail 25' long in PA 220.


Our confirmation images (click on it for a bigger version):





MPEC 2020-G94, assigns the following preliminary parabolic orbital elements to comet  C/2020 F8: T 2020 May 27.59; e= 0.99; Peri. =  68.33; q = 0.42;  Incl.= 110.69

Below you can see a graph generated using the software Orbitas and showing the C/2020 F8 (SWAN) predicted magnitude (in red) versus the maximum height (for Northern Hemisphere). Click on the image for a bigger version. Preliminar orbit has the comet 0.4 AU from Sun with a peak magnitude at about 3 mag. at the end of May 2020! (as always with comets, the future magnitudes reported here are only indicative).  Elongation will start to decrease at the beginning of May 2020 and it will be about 20 degrees at the peak magnitude. Maximum height will be very bad for Northern Hemisphere at peak that is around 3 degrees from the horizon. Then the comet will appears in the morning sky at 11.5 mag in August and it will be observable in good condition after that while fading.  




by Ernesto Guido, Marco Rocchetto & Adriano Valvasori