Although cloud-out is likely, here is a finder chart for Monday's passage of mag 11 asteriod 2007TU24 beginning Monday night at 7:15pm. http://gallery.utahastronomy.com/main.php?g2_itemId=10893 On the chart, I have identified two observing opportunities where a 1.25 deg e.p. TFOV can be oriented relative to a fixed star and the asteriod should drift through the view. 1) At 19:15 orienting mag 5.5 star 55 And at the east quarter of the e.p. (PA 270 measured CCW). 2) At 00:45 on Tuesday morning, orienting midway between the Perseus Double Cluster and eta Perseus. A four star asterism is shown on the finder chart that can be used to orient your e.p. The asteriod will be moving at about 3 deg per hour or 3 arcminutes per minute. My Schaefer based telescopic limiting magnitude (TLM) calculator says for a poor urban mag 4.1 sky and for the high altitude 19:15pm observing window, my small 60mm apeture refractor will have a limiting magitude of 10.4 using the lowest power 32mm e.p. That will be insufficient for this asteriod. An Apogee 5.25 inch apeture refractor and 10 inch Orion relfector will both reach to around mag 11.5 - a testiment to the constraint of light pollution. Increasing magnification increases the TLM reach of a scope, but reduces the TFOV - making acquisition of this fast moving object difficult. With a 20mm e.p., my small 60amm refractor will reach to 11.4 mags in an mag 4.1 sky; the 5.25 Apogee and the Orion 10 inch to to 12.4-12.5. I'll probably be trying with the small 700mm fl refractor, which with the 20mm lens still has about a 1 degree TFOV (35 power) - just to keep the just up hassles to a minimum. - Kurt ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ