Bill, this may be O.T. but informative.

In the interest of people who would desire to produce
such a list there does exist software which can perform
this task. The Institude of Applied Astronomy St.
Petersburg Russia produces the Monthly Update Search
Epemererides software (M.U.S.E) and data files each year.
To produce a list of minor planets at opposition you need
the MUSE program and only the Opposition data file each year.

http://www.ipa.nw.ru/PAGE/DEPFUND/LSBSS/enguemp.htm

I have been downloading and using this program for the last 5 years.
Be warned it is not a GUI interface, the keyboard arrow keys
are used to select parameters. Once the date range is select
and the magintude limit the results will be displayed and then
the option to create a PRN file.

The PRN file is an easy input to any spreadsheet program in
order to sort on any of the output fields. Example shown.

Number Year Month Day magnitude
15677 2009 11 1.1 15.5
9254 2009 11 1.2 15.3
5843 2009 11 1.2 15.7
1520 2009 11 1.3 14.1
1546 2009 11 1.3 14.9
4063 2009 11 1.3 15.2
2480 2009 11 1.4 14.6
4193 2009 11 1.4 15.8
3869 2009 11 1.4 15.9
6971 2009 11 1.4 16
5750 2009 11 1.5 15.6
9612 2009 11 1.7 15.7
268 2009 11 1.8 13.2
46304 2009 11 1.8 15.9
2260 2009 11 1.8 16.1
1435 2009 11 1.9 15.3
1972 2009 11 1.9 15.5
712 2009 11 2.2 10.7
2791 2009 11 2.3 15.4
1885 2009 11 2.5 15.6
1215 2009 11 2.7 14.2
8604 2009 11 2.8 15.3
3455 2009 11 2.8 15.6
57359 2009 11 3 15.9

John D Sabia

--- In guide-user@yahoogroups.com, Bill J Gray <pluto@...> wrote:
>
> Hi Alfredo,
>
> Not entirely sure what you're looking for here. Perhaps
> one of the following?
>
> You can hit Alt-U, which causes Guide to center on the
> opposition point; then zoom out to cover a large area around
> the opposition point, turn asteroids to a desired magnitude,
> and see what asteroids are currently near opposition.
>
> Or, you can do much the same thing, and then use Tables...
> Current Asteroids, and enter (for example) "16*" to get a
> list of all asteroids brighter than mag 16 in that part of
> the sky. To do this, you should be using the current "in
> testing" version from
>
> http://www.projectpluto.com/new.htm
>
> This ability to get a list of asteroids in a particular
> area is described at
>
> http://www.projectpluto.com/new.htm#on_screen_asteroids
>
> Perhaps you are thinking: "I would like to know when
> a particular asteroid reaches opposition"? Guide doesn't
> have that function (yet). I've been asked about it from
> time to time. People would also like to know the time(s)
> when a given asteroid will next come close to the earth
> or other planet, and its MOID (Minimum Orbital Intersection
> Distance, which tells you how close the asteroid _could_
> come to the earth, if they were at the right parts of their
> orbits at the same time... they might never be there at the
> same time, though.)
>
> Or perhaps you are thinking: "I would like a list of
> asteroids that will reach opposition in the next week".
> This is also something people ask about, but which Guide
> doesn't do quite yet.
>
> -- Bill
>