6239 Minos (1989 QF) Planning


Background


6239 Minos (1989 QF) was discovered by Carolyn and Gene Shoemaker at Palomar on 
August 31, 1989.  It will approach within 0.056 AU (21.5 lunar distances) 
on February 2, 2004.  

Its absolute magnitude of 17.9 suggests that it is within a factor of two of about 
1.0 km in diameter.  On January 23, 2004, Petr Pravec reported that the rotation
period is 3.556 +/- 0.001 hours and that the lightcurve amplitude is low.  This indicates
that Minos is a rapid rotator and suggests that it has a low elongation.
The optical albedo and taxonomic class are unknown.  With such a rapid rotation period,
we should obtain thorough rotation phase coverage during our tracks.

Minos will be a moderately strong radar target and we hope to image it with a range 
resolution of at least 75 m/pixel (0.5 usec).
Due to its size and the proximity of its orbit to that of Earth, Minos has been 
classified as a "Potentially  Hazardous Asteroid" by the International 
Astronomical Union's Minor Planet Center.

These will be combined Goldstone and Arecibo observations.  Goldstone observations are
scheduled on January 30-February 2 and Arecibo time has been requested for February 5-9.
Orbital and Physical Characteristics
 orbit type               Apollo   
 semimajor axis           1.151 AU     
 eccentricity             0.413        
 inclination              3.94°       
 perihelion distance      0.676 AU     
 aphelion distance        1.626 AU     
 absolute magnitude (H)  17.9
 diameter                 unknown, but probably between 0.6 - 1.6 km  
 rotation period          3.556 h (Petr Pravec, Peter Kusnirak, and Don Pray)
 pole direction           unknown
 lightcurve amplitude     0.08, suggesting a low elongation
 spectral class           unknown      

Special thanks to Petr Pravec and Peter Kusnirak (Ondrejov Observatory, Czech Republic),
and Don Pray (Carbuncle Hill Observatory, Greene, Rhode Island) for communicating the 
lightcurve results prior to the start of the radar campaign.

Last updated: 2004 February 9


Discovery


Discovery Announcement


                                                Circular No. 4847
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


1989 QF
     C. S. and E. M. Shoemaker report their discovery of a fast-moving
asteroidal object.  The following 0.46-m Schmidt positions are available:

     1989 UT             R.A. (1950) Decl.        V     Observer
     Aug. 31.40503    0 14 29.17   + 0 16 29.5   17     Shoemaker
     Sept. 1.36631    0 09 06.47   + 0 00 50.5              "
           4.40920   23 53 10.98   - 0 46 12.9              "
           5.30347   23 48 51.85   - 0 59 14.1   16.0   Helin
           5.42483   23 48 15.39   - 1 00 54.0            "

C. S. and E. M. Shoemaker (Palomar).
E. F. Helin, B. P. Roman, and R. Crockett (Palomar).

     Preliminary orbital elements from four observations:

     T = 1989 June  4.585 ET          Peri. = 239.251
     e = 0.41744                      Node  = 344.210   1950.0
     q = 0.67197 AU                   Incl. =   3.998
       a =  1.15347 AU     n = 0.795595     P =   1.24 years

     1989 ET      R.A. (1950) Decl.     Delta      r       V
     Sept. 1     0 11.14    + 0 07.2    0.194    1.189    15.7
           6    23 45.58    - 1 08.7
          11    23 24.69    - 2 12.5    0.245    1.251    15.7
          16    23 08.17    - 3 03.6
          21    22 55.50    - 3 43.0    0.312    1.309    16.7
          26    22 46.12    - 4 12.0
     Oct.  1    22 39.55    - 4 31.5    0.394    1.363    17.5

1989 September 6               (4847)             Daniel W. E. Green

SNR Calculation

    Hmag     = 17.9
    Diameter = 0.832 (assumes H = 17.9 and an S-class optical albedo)
    Period   = 4 (an educated guess)

The SNR estimates below adopt RA, DEC, and delta at 00:00 UTC on each date; actual 
view periods may differ, in some cases, substantially.

                           ------------GOLDSTONE----------  -------------ARECIBO-----------
                                            Max                              Max
                                    Dat     Run    UTC               Dat     Run    UTC
    Date   RA  Decl Delta  Runs     SNR     SNR   Window    Runs     SNR     SNR   Window
2004  1 27  85  63  0.073   391     102       6 21:18-36:53    0       0       0      -
2004  1 28  75  64  0.069   421     129       7 20:30-36:17    0       0       0      -
2004  1 29  64  64  0.065   447     160       9 19:36-35:36    0       0       0      -
2004  1 30  52  64  0.062   461     192      10 18:48-34:36    0       0       0      -
2004  1 31  39  62  0.060   460     223      12 18:06-33:30    0       0       0      -
2004  2  1  28  59  0.058   449     247      13 17:36-32:23    0       0       0      -
2004  2  2  18  55  0.057   431     259      14 17:11-31:18    0       0       0      -
2004  2  3  10  50  0.056   409     258      14 16:53-30:23    0       0       0      -
2004  2  4   3  45  0.057   385     242      14 16:41-29:36    0       0       0      -
2004  2  5 358  35  0.060   360     216      13 16:36-28:53   49     910     150 18:24-19:46
2004  2  6 353  30  0.062   334     185      11 16:30-28:18   63    1050     140 17:39-19:52
2004  2  7 350  25  0.065   309     154      10 16:23-27:41   67     910     120 17:12-19:47
2004  2  8 347  21  0.069   285     124       8 16:18-27:18   66     740     100 16:53-19:36
2004  2  9 344  18  0.073   262      99       7 16:18-26:48   62     590      80 16:40-19:24
2004  2 10 342  17  0.074   241      77       5 16:11-26:30   62     590      78 16:36-19:18
2004  2 11 340  13  0.079   222      60       4 16:11-26:06   57     450      63 16:30-19:06
2004  2 12 339  10  0.084   204      46       4 16:11-25:48   51     340      52 16:23-18:48
2004  2 13 337   8  0.089   189      36       3 16:06-25:30   44     250      42 16:23-18:36
2004  2 14 336   5  0.094   174      28       2 16:06-25:18   37     180      34 16:23-18:18

Arecibo SNRs reflects current system sensitivity as of January 6, 2004 (transmitter power ~700 kW).
Entries on February 5-9 show geocentric distances at the mid-epochs of the observations
and actual rise and set times.

Goldstone Track Assignments

              

      UT       UT                                      Duration 
DOY  Date    TX Window          PST TX Window          (hh:mm)  Rotations
---  ----    ---------   ----------------------------  -------  ---------
030 Jan 30   0545-0830   2145-0030 Thursday Jan 29-30    2:45    0.77
031 Jan 31   0430-0830   2030-0030 Friday   Jan 30-31    4:00    1.12
032 Feb 01   0245-0745   1845-2345 Saturday Jan 31       5:00    1.41
033 Feb 02   0215-0630   1815-2230 Sunday   Feb 01       4:15    1.20

Scheduled Arecibo Tracks
------------------------
      UT       UT                                      Duration
DOY  Date    TX Window   PST TX Window  AST TX Window  (hh:mm)  Rotations
---  ----    ---------   -------------  -------------  -------- ---------
036  Feb 05  1824-1946   1024-1146      1424-1546        1:22    0.38
037  Feb 06  1739-1952   0939-1152      1339-1552        2:13    0.62
038  Feb 07  1712-1947   0912-1147      1312-1547        2:35    0.73
039  Feb 08  1653-1936   0853-1136      1253-1536        2:43    0.76
040  Feb 09  1640-1924   0840-1124      1240-1524        2:44    0.77

Sky Motion 
Arecibo rotation phase coverage 

Uncertainties


From Horizons (2003 December 15): JPL solution # 17, # obs: 95 (1983-2003)

 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.         delta POS_3sigma  DOP_S-sig  DOP_X-sig  RT_delay-sig
 2004-Jan-30 00:00      51.81455  63.65046  0.0620036015 9.30116122       1.04       3.70      0.003460
 2004-Jan-31 00:00      39.35645  61.97598  0.0595286423 10.2845367       0.89       3.19      0.003381
 2004-Feb-01 00:00      27.83335  59.08853  0.0577231825 11.4051442       0.72       2.59      0.003243
 2004-Feb-02 00:00      17.90648  55.14619  0.0566480905 12.5753223       0.54       1.94      0.003042
 2004-Feb-03 00:00       9.71795  50.43010  0.0563445047 13.6702764       0.38       1.35      0.002780
 2004-Feb-04 00:00       3.09022  45.25882  0.0568266669 14.5621162       0.32       1.16      0.002465
 2004-Feb-05 00:00     357.74004  39.92776  0.0580794007 15.1576408       0.45       1.59      0.002114
 2004-Feb-06 00:00     353.39364  34.67578  0.0600612678 15.4206082       0.65       2.32      0.001746
 2004-Feb-07 00:00     349.82518  29.67246  0.0627120931 15.3701755       0.87       3.10      0.001381
 2004-Feb-08 00:00     346.86001  25.02076  0.0659620919 15.0622082       1.08       3.86      0.001044
 2004-Feb-09 00:00     344.36630  20.76911  0.0697400039 14.5666368       1.28       4.57      0.000768

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

From Horizons (2004 January 20): JPL solution #30, # obs: 187 (1983-2004)

 2004-Jan-30 00:00      51.75343  63.66597  0.0620077782 2.67490902       0.35       1.25      0.000950
 2004-Jan-31 00:00      39.29167  61.98614  0.0595357092 3.11118762       0.33       1.19      0.000885
 2004-Feb-01 00:00      27.77120  59.09339  0.0577333056 3.55025755       0.31       1.09      0.000803
 2004-Feb-02 00:00      17.85090  55.14679  0.0566613284 3.95519991       0.27       0.97      0.000704
 2004-Feb-03 00:00       9.67026  50.42796  0.0563607851 4.28711171       0.23       0.84      0.000593
 2004-Feb-04 00:00       3.05008  45.25542  0.0568457868 4.51518992       0.20       0.70      0.000474
 2004-Feb-05 00:00     357.70646  39.92431  0.0581010518 4.62511769       0.17       0.60      0.000357
 2004-Feb-06 00:00     353.36551  34.67308  0.0600850794 4.62136334       0.16       0.57      0.000257
 2004-Feb-07 00:00     349.80153  29.67093  0.0627376783 4.52286239       0.17       0.62      0.000204
 2004-Feb-08 00:00     346.84002  25.02056  0.0659890846 4.35539621       0.21       0.75      0.000225
 2004-Feb-09 00:00     344.34931  20.77021  0.0697680808 4.14466261       0.25       0.91      0.000296

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

From Jon Giorgini (2004 January 26):

  With 240 useable optical observations spanning 1983-Jan-14 
to 2004-Jan-25, 6239 Minos sol #38 3-sigma X-band uncertainties 
are as shown below. Goldstone OSOD & radar predicts have been 
established on stealth.

      DATE          Pointing  X-band Dop     Delay  
                      (")         Hz         (sec)  
-----------------  ---------  ----------  ----------
30-JAN-2004 00:00      1.656       1.002    0.000739
31-JAN-2004 00:00      1.979       0.957    0.000698
 1-FEB-2004 00:00      2.314       0.894    0.000644
 2-FEB-2004 00:00      2.633       0.816    0.000578
 3-FEB-2004 00:00      2.905       0.730    0.000501

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

From Jon Giorgini (2004 January 31):

   With the single delay and 288 useable optical observations
spanning 1983-Jan-14 to 2004-Jan-29, new solution #42 3-sigma
X-band uncertainties are shown below. 

   New predict files are on stealth. OSOD and sol #42 predicts
have been established on utuado (Arecibo).

      DATE          Pointing  X-band Dop     Delay  
                      (")         Hz         (sec)  
-----------------  ---------  ----------  ----------
30-JAN-2004 00:00      1.077       0.822    0.000537
31-JAN-2004 00:00      0.632       0.573    0.000057
 1-FEB-2004 00:00      0.665       0.576    0.000058
 2-FEB-2004 00:00      0.690       0.577    0.000062
 3-FEB-2004 00:00      0.703       0.574    0.000070


Setups

CW Setup for the third track: We will use solution 44

TX polarization           RCP
RCV polarization          LCP
Frequencies:              2
Dwell:                    20 seconds
Bandwidth:                4000 Hz 
Sampling interval:        2500 x 0.1 usec 
VME FFT for PSD files:    4096 for 0.97656-Hz resolution


Possible ranging setups:
---------------------------------------------------------------------------

127 x 64 10-usec single sample

baud            10 usec
code            127
gates           127
FFT             64
CLT             11
ncoh            2
bandwidth       394 Hz   
resolution      6.15 Hz
TXOFF           +60 Hz -> echo will be centered at +9.75 bins or in bin 32+10 = 42
incoh sums      64 => 10.4 sec/record

---------------------------------------------------------------------------

127 x 64 11-usec single sample, 5.6-Hz resolution.

baud            11 usec
code            127
gates           127
PRP             1397
FFT             64
CLT             11
ncoh            2
bandwidth       357.9 Hz   
resolution      5.59 Hz
TXOFF           TBD
-------------------------------------------------------------------------

127 x 64 11-usec single sample, 11.2-Hz resolution

baud            11 usec
code            127
gates           127
PRP             1397
FFT             64
CLT             11
ncoh            1
bandwidth       715.8 Hz   
resolution      11.2 Hz
TXOFF           +60 -> echo would be centered at +5 bins w/perfect ephemeris

-------------------------------------------------------------------------

127 x 64 7-usec single sample
------------------------------
baud            7 usec
code            127
gates           127
PRP             889
FFT             64
CLT             11
ncoh            1
bandwidth       1124.9 Hz   
resolution      17.6 Hz
TXOFF           +60 -> echo would be centered at +3.4 bins w/perfect ephemeris

-------------------------------------------------------------------------

127 x 64 1-usec single sample
------------------------------
baud            1 usec
code            127
gates           127
PRP             127
FFT             64
CLT             13 & 14, about evenly divided
ncoh            15
bandwidth       525 Hz   
resolution      8.2 Hz
TXOFF           +50 -> echo would be centered at +6.1 bins w/perfect ephemeris

-------------------------------------------------------------------------------

0.125-usec ranging
------------------
setup           JX1XS001  
baud            0.125 usec
code            127
gates           127
FFT             64
ncoh            1968
bandwidth       32.008 Hz     
resolution      0.5001 Hz
TXOFF           6 Hz = 12 cells, => cell 44
incoh sums      4 looks=> 8 sec/record => expect records per run ~ RTT/8
CLT gate        34.8

_____________________________________________________________________
POSSIBLE RANGING SETUPS: (code=127, FFT=64, single-pol'n) 
   These are from JX, w/ max-band (min-acc) options from Ray Jurgens.
   Currently configured for 5-sec records.
_______________________________________________________________________
 Setup        Baud        RP         1-acc 1-acc      
            usec   m      usec        band   res    acc  band     res 
_______________________________________________________________________
 
JX1XS110  11.000 1650    1397.0      715.8  11.2      2   358     5.6
JX1XS070   7.000 1050     889.0     1124.9  17.6      3   375     5.9
                                                      
JX1XS020   2.000  300     254.0     3937.0  61.5     12   328     5.1
                                                      4   984    15.4 

JX1XS010   1.000  150     127.0     7874.0 123.0     41   192     3.0 
                                                      8   984    15.4 

JX1XS005   0.500   75      63.5    15748.0 246.1    123   128     2.0 
                                                     15  1050    16.4 

JX1XS002   0.250   37.5    31.75   31496.1 492.1    492    64     1.0
                                                     30  1050    16.4 
 
JX1XS001   0.125   18.75   15.875  62992.1 984.3   1970    32     0.5 
                                                     60  1050    16.4 
____________________________________________________________________


Instructions

NOTE: Data should be moved to the appropriate subdirectories in stealth:/export/data0/rosema/minos/raw/

6239 Minos POINTING:


   OSOD and initial predicts have been set-up at
Goldstone on stealth:

   /export/data2/osod/ops/6239_Minos/PRDX.OUT.s44
                                    /PUNCH.OUT.s44
                                    /EPH.OUT.s44

The predicts are also available at:
   /export/data0/rosema/minos/support/PRDX.OUT.s44
                                     /PUNCH.OUT.s44
                                     /EPH.OUT.s44


POINTING  
                                                  TX Offsets    
Date (UTC)   DOY  hhmmss    RA       Dec   Macro  LHA      Dec    RTT  OSOD

2004 02 02    33  020000  17.1271 54.7747   A                     56.5  38
2004 02 02    33  030000  16.7450 54.5844   A                     56.5
2004 02 02    33  040000  16.3691 54.3913   A                     56.4
2004 02 02    33  050000  16.0000 54.1959   A    0.0057  -0.0030  56.4
2004 02 02    33  060000  15.6381 53.9988   A                     56.4
2004 02 02    33  070000  15.2835 53.8004   A                     56.4
2004 02 02    33  080000  14.9360 53.6014   A                     56.4


PRDX.OUT.s44 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL 2004 FEB 02 02:10 56.4737750825 55242.761 30.1719 54.7430 17.062 61.640 2004 FEB 02 02:20 56.4699392380 54208.621 32.7426 54.7114 16.999 60.353 2004 FEB 02 02:30 56.4661754472 53187.189 35.3132 54.6797 16.935 59.024 2004 FEB 02 02:40 56.4624827720 52179.466 37.8837 54.6479 16.871 57.660 2004 FEB 02 02:50 56.4588602234 51186.427 40.4540 54.6161 16.808 56.266 2004 FEB 02 03:00 56.4553067389 50209.017 43.0241 54.5842 16.744 54.847 2004 FEB 02 03:10 56.4518211909 49248.152 45.5940 54.5522 16.681 53.408 2004 FEB 02 03:20 56.4484023823 48304.714 48.1638 54.5201 16.618 51.951 2004 FEB 02 03:30 56.4450490742 47379.553 50.7334 54.4879 16.556 50.481 2004 FEB 02 03:40 56.4417599446 46473.481 53.3028 54.4557 16.493 49.001 2004 FEB 02 03:50 56.4385336342 45587.274 55.8720 54.4234 16.431 47.513 2004 FEB 02 04:00 56.4353687250 44721.666 58.4411 54.3911 16.369 46.020 2004 FEB 02 04:10 56.4322637452 43877.354 61.0099 54.3587 16.307 44.523 2004 FEB 02 04:20 56.4292171824 43054.990 63.5786 54.3262 16.245 43.026 2004 FEB 02 04:30 56.4262274735 42255.183 66.1471 54.2936 16.183 41.530 2004 FEB 02 04:40 56.4232930143 41478.499 68.7153 54.2610 16.122 40.036 2004 FEB 02 04:50 56.4204121784 40725.454 71.2834 54.2284 16.060 38.547 2004 FEB 02 05:00 56.4175832795 39996.522 73.8513 54.1957 15.999 37.063 2004 FEB 02 05:10 56.4148046126 39292.124 76.4189 54.1629 15.939 35.587 2004 FEB 02 05:20 56.4120744510 38612.635 78.9864 54.1301 15.878 34.121 2004 FEB 02 05:30 56.4093910371 37958.379 81.5537 54.0973 15.818 32.664 2004 FEB 02 05:40 56.4067525894 37329.630 84.1207 54.0644 15.757 31.219 2004 FEB 02 05:50 56.4041573090 36726.611 86.6876 54.0315 15.697 29.788 2004 FEB 02 06:00 56.4016033955 36149.493 89.2543 53.9985 15.637 28.371 2004 FEB 02 06:10 56.3990890198 35598.394 91.8207 53.9655 15.578 26.969 2004 FEB 02 06:20 56.3966123556 35073.382 94.3870 53.9325 15.518 25.585 2004 FEB 02 06:30 56.3941715799 34574.471 96.9530 53.8994 15.459 24.219

 

GOLDSTONE MASTERLOG

MASTERLOG ============================================================================== RCV file setup runs start -stop osod OFFSET TX Poln ------------------------------------------------------------------------------ January 30 CW 4 kHz, 2 hops, 20 s dwell, 4k FFT 34 064120-075042 38 none RCP PFS 8 073514-075042 38 none RCP VME 10 us x 12.3 Hz, 127 code, 64 FFT 4 055740-060458 38 +49.21 Hz RCP PFS & VME 11 us x 11.2 Hz, 127 code, 64 FFT 4 070530-071430 38 +44.74 Hz RCP PVS & VME
January 30 CW spectrum ------------------------------------------------------------------------------ January 31 CW 4 kHz, 2 hops, 20 s dwell, 4k FFT 20 044004-052108 40 none RCP PFS & VME 10 us x 6.15 Hz, 127 code, 64 FFT 12 055345-061645 40 +49.21 RCP PFS & VME 1 us x 12.3 Hz, 127 code, 64 FFT 57 063612-082932 40 +49.21 RCP PFS & VME January 31 CW spectrum ------------------------------------------------------------------------------ February 01 CW 4 kHz, 2 hops, 20 s dwell, 4k FFT 135 032314-074420 44 none RCP PFS & VME February 01 CW spectrum, file A February 01 CW spectrum, file B February 01 CW spectrum, file C ------------------------------------------------------------------------------ February 02 CW 4 kHz, 2 hops, 20 s dwell, 4k FFT 10 024503-030309 44 none RCP PFS & VME 1/8 us x 8.0 Hz, 127 code, 64 FFT 44 033715-050009 44 +32.0 RCP PFS & VME 1/8 us x 8.0 Hz, 127 code, 64 FFT 45 050554-063046 44 +32.0 RCP PFS & VME February 02 CW spectrum ==============================================================================

ARECIBO MASTERLOG

February 05 RI /share/olda/datafile.05feb04.r1883.1 CW soln 46 PFS /share/pfs2/Minos/data20040205* 0.1 us soln 46 <--- AST ---> <--- UTC ---> eph rcsta rcend rcsta rcend setup code Bandwidth OSOD TXoff delay Runs scans HHMMSS-HHMMSS HHMMSS-HHMMSS Comments -------------------------------------------------------------------------------------------- CW no hopping 5000 46 +200 none 5 1- 5 144951-145847 184951-185847 RI 0.1 us 65535 152.59 46 +5 30000 20 6-25 150339-154232 190339-194232 PFS -------------------------------------------------------------------------------------------- February 06 RI /share/olda/datafile.06feb04.r1883.1 CW soln 48 PFS /share/pfs2/Minos/data20040206* 0.1 us soln 48 CW no hopping 5000 48 +200 none 5 1- 5 133954-134908 173954-174908 RI 0.1 us 65535 152.59 48 +5 30000 57 6-62 135425-155142 175425-195142 PFS -------------------------------------------------------------------------------------------- February 07 RI /share/olda/datafile.07feb04.r1883.1 CW soln 48 PFS /share/pfs2/Minos/data20040207* 0.1 us soln 48 CW no hopping 5000 48 +200 none 11 1-11 131232-133515 171232-173515 RI 0.1 us 65535 152.59 48 +5 30000 56 12-67 134051-154504 174051-194504 PFS -------------------------------------------------------------------------------------------- February 08 RI /share/olda/datafile.08feb04.r1883.1 CW soln 48 PFS /share/pfs2/Minos/data20040208* 0.1 us soln 48 CW no hopping 5000 48 +200 none 9 1- 9 125452-131425 165452-171425 RI 0.1 us 65535 152.59 48 +5 30000 62 10-71 131621-153632 171621-193632 PFS -------------------------------------------------------------------------------------------- February 09 RI /share/olda/datafile.09feb04.r1883.1 CW soln 48 PFS /share/pfs2/Minos/data20040209* 0.1 us soln 48 CW no hopping 5000 48 +200 none 10 1-10 124232-130540 164232-170540 RI 0.1 us 65535 152.59 48 +5 30000 53 11-63 130840-152323 170840-192323 PFS -------------------------------------------------------------------------------------------- ============================================================================== RADAR ASTROMETRY ================ 2004 01 30 08:20:00 R 60.9588308 20.0 8560.D6 -14 Benner, L.A.M. Correction of -393 usec to solution 38 from 10 and 11 usec ranging. 2004 01 31 06:50:00 R 58.833514 2.0 8560.D6 -14 Benner, L.A.M. Correction of -7 us to solution 40 from 10 us and 1 us ranging. 2453041.313243 6418 2380.D6 -1 293.2473-404850-133340 AR20040205.812500 193000 59.51340324 -1 293.2473-404850-133340 1.0 Ostro,Nolan,Giorgini Arecibo / Arecibo -35.9 usec wrt OSOD #46 (59.513439140). 15 run sum, .1 usec resolution. ==============================================================================
Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 300-233 | FAX: (818) 354-9476 Jet Propulsion Laboratory | email: lance@reason.jpl.nasa.gov Pasadena, CA 91109-8099 | Plan: To live long and prosper

Asteroid Radar Astronomy