|Past, Present, and Future Orbits by Kazuo Kinoshita|
Copyright © 2002 by Giovanni Sostero (Italy)
J. G. Sanguin (El Leoncito) discovered this comet with the 51-cm double astrograph on 1977 October 15.06. He gave the total magnitude as 16. The comet was confirmed by Hans-Emil Schuster (European Southern Observatory) on October 20 with the 100-cm Schmidt telescope. Schuster estimated the magnitude as 15-16 and said the object was diffuse with some condensation. In moonlight, there was also a very faint tail to the northeast. An independent discovery was made by C. Torres (Cerro El Roble, Chile) on plates exposed on October 11.08. He was unable to confirm the object until October 19. Torres gave the magnitude as 13-14 on the 11th and described the comet as diffuse, with a condensation. There was a tail extending 20" northeastward. On the 19th, Torres said the comet was magnitude 16 and was diffuse, without a condensation. At the beginning of November, J. Gibson (Palomar Observatory, California, USA) found a prediscovery image on an exposure made by S. J. Bus and T. Lauer on September 13.27. The total magnitude was given as 14.5.