2004 BL86 flyby

Forums Asteroids 2004 BL86 flyby 2004 BL86 flyby

Mike Foylan

Hi Guys
Really excellent work and excellent images, thanks for posting. Clouded out here unfortunately at the time. Just wondering if there was a rotation period reported for 2004 BL86?
I checked the Minor Planet Ephemeris Service for this object and it reported that its apparent motion across the sky was in the order of 159 arcsec/min around closest flyby. A quick calculation for my own telescope system with a pixel scale of 2.17 arcsec/pixel indicates that a maximum exposure time of 0.8 seconds was allowable before trailing would occur of the asteroid target! I think this would indeed be a big challenge to obtain good SNR values and even more so for a rotation curve! I am guessing that those in possession of higher end tracking mounts can somehow program the mount to follow the asteroid instead of sidereal rate.

Best wishes and clear skies