Title  Astrometry of NEAs and TNOs
Pi     B. Butler
Time   30 hrs

Title: Astrometry of NEAs and TNOs
Authors: B. Butler

Abstract: ALMA will provide valuable input on the positions,
   and hence orbits, of NEAs and TNOs - a valuable tool in
   determining the formation and orbit history and evolution
   of these bodies.  For NEAs, this is particularly important,
   as observations can be carried out in daytime.

                                                                             contin         line        poln
name      RA&DEC   m T SD CA sub resn size  freq   line   dfreq      BW    fd       rms    fd    rms   fd    rms   time
-------  --------  - - -- -- --- ---- ----- ----  ------ --------  -----  --------------  -----------  ---------  -------
NEA/TNO  ecliptic  Y Y N  N   N   any small  345    N/A    N/A     8 GHz  40-200 K   1 K      N/A      3 K  .1 K  60x.5 h
total                                                                                                             30 h

Note: These will be mostly TOO observations, occurring at
   truly unpredictable times.

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See program 4.1.1. for general comments Butler and Gurwell

Review Mark Gurwell: 
        Excellent choice for NEAs but don't see the advantage for
       TNOs over optical, really.

Reply Butler:
TNOs are also daytime objects, and the astrometry of ALMA should
be *much* better than optical...

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Review v2.0:
 
Review of 4.2.1-4.2.8 (no DRSP 2.0 updates received)

These projects still remain scientifically valid. Do the additional
ALMA bands offer something new (e.g., for projects 4.2.4, 4.2.5)? The
integration times are probably still ok eventhough the number of
antennas has gone from 64 to 50 - or at least close enough.

Several of these projects focus on objects larger than the ALMA
primary beam, and mosaicing is needed. Here the ACA and also the ACA
in crosscorrelation with the ALMA-12m antennas may be beneficial.