On 2001-11-20 12:42, Kaptain K wrote:
I invite you to read an abstract of their work and debate two questions:
a) How come the whole world missed such a conspicuous phenomenon? A conjunction of factors?
Insufficient data (in the abstract). No co-ordinates or ephemerides given. It is possible for a comet to be in such an orbit that (from Earth) it never appears in the dark sky. Either in twilight or behind the sun. IIRC SOHO detects a few "suicidal" comets every year that crash into the sun without ever being seen from Earth.
b) Which the implications for the count of potentially dangerous objects approaching our planet?
Again, insufficient data. One datum point is not statistically viable.