[semi-OT] a sensor-related post of sorts [Fwd: active s/c IDed as asteroid 2001 DO47!]

Colleague forwarded this on to me, and I thought, in light of some of the
sensor discussion a few weeks (months???) ago (was it weeks or months? I can't
remember), some of the material herein might give those interested in the
periodic sensor discussions some material
to chew on (eg, this is a vacc-head-related post; delete and ignore
if you're only interest is being on the ground ;-)

Mk

> Helen Hart wrote:
One
> object, I think Cassini, was detected at about 9 million km by Jim