Dear Colleagues, In the May lunation, we need to finish the discovery phase for the new binary (1830) Pogson. It may be be done very fast, I will write more comments and an ephemeris for events to the binast-webtool. Then there is the tough post-opposition binary suspect (6615) Plutarchos, for which Julian and Don plan to get more observations to hopefully establish it satisfactorily. Of the other worked targets, none requires a collaboration at this time, they are under control from their working stations. There is one returning binary, (5477) 1989 UH2, discovered in November 2005 by Warner et al. (CBET 288). Its basic parameters have been well estimated Ds/Dp= 0.37 +/-0.02 P1= 2.9941 +/-0.0002 h Porb= 24.42 +/-0.02 h H_R= 13.99 (hence H=14.44, uncertain to about 0.1 mag) A1= 0.11 mag http://www.asu.cas.cz/~ppravec/5477_all.png http://www.asu.cas.cz/~ppravec/5477_longpc.png http://www.asu.cas.cz/~ppravec/5477_shortpc.png In this year's apparition, it will be observable from southern hemisphere stations only, so I encourage Julian and David to work this one. With its Porb of 24.42 h, it may not be possible to cover both the primary and the secondary events during one lunation, depending on where exactly we are in orbital anomaly now. But covering at least one of the two events twice should be very useful for future modeling of the system so that orientation of its orbit and other parameters can be estimated. When first event is detected, we will be able to plan more observations in this apparition accordingly. This list of targets is also available on http://www.asu.cas.cz/~asteroid/binastphotsurvey_listoftargets20070517.txt Clear Skies, Petr Pravec Object V Dec Elo Mot Bga H q a Arc 0. Worked objects: (1830) Pogson 15.3 -6 157v 0.2 51 12.4 2.07 2.19 25opp Binary, more data are needed to monitor evolution of mutual events that were non-central in April, and to establish Ds/Dp better. Ephemerides will be put to the binast-webtool. (2422) Perovskaya 16.2 4 134v 0.0 67 13.7 1.87 2.33 16opp Slow-ish rotator, under control by Julian Oey. (2696) Magion 15.9 10 143v 0.2 66 12.0 2.17 2.45 15opp Observed from Modra. (3007) Reaves 16.1 0 143v 0.2 61 12.4 2.05 2.37 15opp Under control from Badlands. (3166) Klondike 15.8 0 137v 0.1 63 13.0 1.98 2.24 15opp Slow-ish rotator, under control by Julian Oey. (4570) Runcorn 16.1 -4 123v 0.1 55 13.0 1.96 2.20 10opp Slow-ish rotator, under control by Julian Oey. (5440) Terao 15.4 -4 154v 0.2 54 13.3 1.86 2.17 10opp Slowish rotator, under control from Modra and Ondrejov (6615) Plutarchos 17.0 5 118v 0.2 62 14.0 1.89 2.17 9opp Binary suspect, planned to be worked more by Julian and Don. (14921) 1994 QA 15.4 13 142v 0.5 66 13.2 1.81 2.33 9opp Slowish rotator, under control from Modra. (16173) 2000 AC98 15.9 -5 149v 0.2 56 13.8 1.77 2.25 9opp Under control from Ondrejov. (86829) 2000 GR146 16.0f 15v 141 1.0 67 16.2 0.62 1.46 6opp Worked from Modra. (95711) 2003 AK 16.1 26 134 0.4 51 14.4 1.54 2.34 6opp Slow rotator, under control from Ondrejov. 1. Returning binaries (5477) 1989 UH2 16.0 -23 175v 0.5 29 13.4 1.77 1.92 7opp 2. Returning "prime suspects", to be followed up on their 2nd (3rd, ...) apparitions Object V Dec Elo Mot Bga H q a Arc Hrev P Ampl U None in workable conditions. 3. New targets (3364) Zdenka 15.7 -8 168 0.2 37 13.8 1.97 2.20 12opp (4555) 1987 QL 15.8 -7 159^ 0.2 24 13.7 1.81 2.26 10opp (6949) 1982 RZ 15.6 2 147^ 0.2 23 13.1 1.98 2.36 9opp (7055) 1989 KB 15.4 -6 162^ 0.3 29 12.9 1.78 2.35 10opp (23971) 1998 YU9 16.0 3 156 0.2 39 13.6 2.04 2.36 9opp (28736) 2000 GE133 16.2 -3 163 0.3 38 13.4 2.13 2.28 6opp Note: The ephemerides were computed for 2007-05-17 ^/v means that the value increases/decreases by more than 0.05 mag/day (for V) or by more than 0.5 deg/day for Dec and Elong. The rate of apparent motion (Mot) is in deg/day. Bga is the galactic latitude. Compact listing: (1830) (2422) (2696) (3007) (3166) (4570) (5440) (6615) (14921) (16173) (86829) (95711) (5477) (3364) (4555) (6949) (7055) (23971) (28736)