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Hmm;
OK. Thanks Steven.
So, the comet passed within 0.12 astronomical units (18,000,000 km) from Earth on October 20, 2010 (8 days before perihelion of 1.05 AU).
The flyby was able to show that the comet nucleus was 2.25 kilometers wide.
So, 2.25 kms wide, (the nucleus), and 18 million kms away.
Could this be considered a 'point source' from Earth ?
(I guess not because of the coma .. although that didn't look very big from the close-ups taken by Deep Impact).
Cheers
PS: Also interesting is that the jets were coming from the dark side of the nucleus.
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