Compare with the two images `in phase' by:
Keck,
taken 10 hrs before and showing only the impact A and C, at 3,5 microns.
HST,
taken 10 hrs after and showing the same three impact sites in blue and far UV.
Observers: Steve Levine, Luis Salas, Irene Cruz-Gonzalez, Luis Carrasco, Jim Klavette, Elfego Ruiz, Fidel Cruz, Carlos Carrasco, Gabriel Garcia y Salvador Monrroy
The OAN (Observatorio Astronomico Nacional) is located in San Pedro Martir, Baja California, near the Mexican-US border at an altitude of 2,830 meters and is operated by the IA-UNAM (Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico).