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Sunday, August 25, 2013


NEO Asteroid 1999 CF9, Saturday August 24, 2013

Near Earth Asteroid  1999 CF9 on Saturday August 24 at 8:00 pm AEST. Taken with iTelescope T9 at Siding Spring Observatory. The Image is a stack of 11 images, stacked badly on the asteroid (the double dot near the centre, the other weird dot sprays are hot pixels) using ImageJ and a MAXIMUM Z project. Click to embiggen18 Images of the asteroid made into a GIF animation. Click to embiggen.

Near Earth Asteroid 1999 CF9 came close to Earth on  August 23 at 00:28 UT at distance of 0.06 AU (around 25 Earth-Moon distances). It has an estimated diameter of  1.1 km.

Unfortunately the iTelescopes were clouded out  on the 23rd, at closest approach, but I was able to get this shot of 1999 CF9 on Saturday 24 August. It was moving just a little bit too fast to the autoguider of T9 to track it properly, so it drifted a little bit (enough to confuse the stacking algorithm in ImageJ), but not enough to stop me getting astrometry off it.The Asteroid was around magnitude 14.5 in these images.

Now waiting for 2013 QR1 imagery to come in. This fast mover is more difficult.

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