Thanks Al! Don't leave it too long - it's dimming fairly rapidly. By the start of Aug it'll be almost mag 19, dimmer than mag 20 by the end (JPL ephemeris). Interesting about the current brightness, don't quite know what to make of it. And I don't understand why someone hasn't done deep CCD images rather than the standard astrometrical ones.
But it is moving fast!
Cheers -