NASA Is Planning A Comet ISON Encounter: BRRISON, Balloon Rapid Response for ISON.
. by Anura Guruge
>> Will NASA schedule spacecraft encounter with ISON … — Apr. 21, 2013.
So we now know of at least one NASA initiative to ‘rendezvous’,
albeit at a distance, with Comet ISON, C/2012 S1 (ISON).