Cbet nr. 3783, issued on 2014, January 16, announces the discovery of an apparently asteroidal object (discovery magnitude ~18.1) by Cristovao Jacques
, Eduardo Pimentel, and Joao Ribeiro de Barros on CCD images obtained on Jan. 12.0 UT with a 0.45-m f/2.9 reflector of the Southern Observatory for Near Earth Research (SONEAR
) at Oliveira, Brazil. The object has been found to show cometary appearance by CCD astrometrists elsewhere and then also by Jacques et al. The new comet has been designated C/2014 A4 (SONEAR).
We performed follow-up measurements of this object, while it was still on the neocp.
Stacking of 19 unfiltered exposures, 90-sec each, obtained remotely from MPC code Q62 (iTelescope
, Siding Spring) on 2014, January 13.4 through a 0.50-m f/6.8 astrograph + CCD, shows that this object is a comet: small coma nearly 5 arcsec in diameter with a hint of elongation toward North-East.
We observed the object again on January 14.5: stacking of 25 R-filtered exposures, 30-sec each, obtained remotely from MPC code E10 (Faulkes Telescope South
) on 2014, January 14.5 through a 2.0-m f/10.0 Ritchey-Chretien + CCD (operated by Las Cumbres Observatory Global Telescope Network), shows that this object is a comet: diffuse coma nearly 8 arcsec in diameter slightly elongated toward North-East
© Remanzacco Observatory
Above, our confirmation image obtained with Faulkes South. Click on it for a bigger version.
assigns the following preliminary parabolic orbital elements to comet C/2014 A4: T 2015 Sept. 11.11; e= 1.0; Peri. = 3.02; q = 3.82; Incl.= 121.26. Big congratulations to our friends Cristovao, Eduardo &
Joao Ribeiro for this discovery!!
The discoverers dedicated this new comet to two great comet observers that are not among us anymore: Vicente Ferreira de Assis Neto
& Giovanni Sostero