Dear Colleagues,

I'm sending an updated list of targets.  
A few more comments on the four binaries/suspects,
(the following listing order corresponds to urgency/importancy):
(4951) Iwamoto - This one is unusual and a concentrated effort is needed,
                 but it is bright and favorable for most northern hemi-
                 sphere stations.  Long sessions with errors not greater 
                 than 0.03 mag are needed.
(5407) 1992 AX - This binary discovered in 1997 has a favorable apparition
                 now, a few good long sessions with errors <=0.02 mag per
                 lunation are needed to establish its parameters better
                 than we did in 1997.
(3073) Kursk - Evolution of events is expected in this lunation, but it 
               may be already too faint for most of us to get data with
               errors <=0.02 mag, so obtaining sufficient follow-up data 
               is uncertain.  Anyway, I'll put ephemeris for the events
               on the binast-webtool.
(2786) Metsahovi - This probable binary would deserve to be monitored
               for possible occurence of events with changing geometry.
               It is bright, so basically all northern stations could
               work it (though 4951 Iwamoto should have a priority).
               Obtaining a couple good long sessions covering at least
               10 hours might suffice.

If/when someone needs new targets (e.g., southern hemisphere stations
which cannot work any of the above binaries well), there is a list
of proposed new targets further below.

This list of targets is also available on
http://www.asu.cas.cz/~asteroid/binastphotsurvey_listoftargets20070119.txt

Clear Skies,

Petr Pravec

Object                       V    Dec  Elo   Mot Bga   H    q    a     Arc

0. Worked objects:
(2328)   Robeson            16.2    7  125v  0.1 -29  12.5 2.01 2.34  11opp
                     Period unclear.  Worked by David Higgins, but a few
                     linked nights from another station would be useful 
                     as well.
(2486)   Metsahovi          14.9   37  159v  0.2  19  12.4 2.09 2.27  16opp
                     Probably binary with two periods 4.4516 and 2.6404 h,
                     but no mutual events seen.  Follow up observations
                     covering at least 10 hours might be useful to monitor
                     it.
(2776)   Baikal             14.5   10  167^  0.2  27  12.5 1.96 2.37  18opp
                     Period unclear, linked data are needed.
(2874)   Jim Young          15.4   26  174   0.3  26  13.2 1.94 2.24  17opp
                     Slow rotator, under control by Don Pray.
(3073)   Kursk              16.6   13  119v  0.2 -32  13.5 1.93 2.24  12opp
                     Binary.  Follow up observations with errors <=0.02 mag
                     would be useful, see the binast-webtool for details.
(4951)   Iwamoto            15.3   24  168^  0.3  37  13.4 1.88 2.26   9opp
                     Binary candidate, a concentrated effort needed to 
                     establish it.
(13006)  Schwaar            15.0    9  169^  0.6  21  13.6 1.82 2.27   9opp
                     Worked by David Higgins.
(15424)  1998 QE100         15.7   26  173v  0.2  22  13.7 1.94 2.40   6opp
                     Under control from Modra.

Special target:
(5407)   1992 AX            16.0   20  163^  0.3  40  14.5 1.33 1.84  13opp
                     Binary (see Pravec et al., 2006, Icarus 181, 63). 
                     Pprim= 2.5488 h, Porb= 13.520 h, Ds/Dp = 0.2, H=14.47.
                     It is in favorable conditions in Jan-March 2007.
                     Good observations with errors <0.02 mag during
                     this apparition are needed to establish its parameters
                     with higher precision than it was possible with the 
                     noisier data from the discovery apparition of 1997.
                     
1. New targets:
(1164)   Kobolda            15.4   -5  129^  0.2  49  12.8 1.86 2.31  15opp
(1338)   Duponta            15.7    4  130^  0.0  58  12.3 2.01 2.26  22opp
(1790)   Volkov             14.9   22  158^  0.2  46  12.5 2.01 2.24  19opp
(2086)   Newell             15.1   15  166^  0.2  35  12.4 2.13 2.40  19opp
(2398)   Jilin              15.6   19  155^  0.2  47  13.6 1.83 2.39  12opp
(2424)   Tautenburg         15.3   33  157^  0.2  46  12.9 2.03 2.35  16opp
(2472)   Bradman            15.5   22  162^  0.2  42  13.1 2.05 2.27   9opp
(2478)   Tokai              15.7    3  143^  0.1  46  12.8 2.07 2.23  13opp
(2768)   Gorky              15.2   26  159^  0.3  45  12.3 1.85 2.23  15opp
(3314)   Beals              15.7   30  167^  0.3  36  13.1 2.12 2.22  15opp
(4374)   Tadamori           15.8    1  122^  0.1  60  13.0 1.85 2.22  10opp
(4936)   Butakov            15.6   11  163^  0.2  34  13.3 1.99 2.28  13opp
(5129)   Groom              15.6    2  142^  0.1  46  12.4 2.18 2.38  12opp
(6555)   1989 UU1           15.9    7  152^  0.2  41  13.4 2.01 2.22  11opp
(6709)   Hiromiyuki         16.2   16  156^  0.2  44  13.7 1.97 2.35  12opp
(6737)   Okabayashi         16.0   13  149^  0.1  50  13.3 2.04 2.33  12opp
(9368)   Esashi             16.0   15  165^  0.2  35  13.7 2.04 2.31  10opp
(13026)  1989 CX            16.1   15  138^  0.3  61  13.8 1.81 2.35   7opp
(13497)  Ronstone           15.5   42  131^  0.1  68  13.1 1.78 2.32   5opp
(14142)  1998 SG10          16.1   29  166^  0.3  38  13.7 1.99 2.32   7opp
(46598)  1993 FT2           15.7   43  135^  0.2  64  13.6 1.66 2.33   7opp

Note: The ephemerides were computed for 2007-01-19
      ^/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:
(2328)
(2486)
(2776)
(2874)
(3073)
(4951)
(13006)
(15424)
(5407)
(1164)
(1338)
(1790)
(2086)
(2398)
(2424)
(2472)
(2478)
(2768)
(3314)
(4374)
(4936)
(5129)
(6555)
(6709)
(6737)
(9368)
(13026)
(13497)
(14142)
(46598)