2006 CF Goldstone Radar Observations Planning


Background


2006 CF was discovered by Spacewatch (Kitt Peak) on February 1, 2006. 
Not much is known about this object except that its absolute magnitude of 19.9 suggests 
a diameter of ~0.35 km (within a factor of two).  2006 CF belongs to the Apollo class of 
asteroids, it has a relatively high eccentricity (~0.7), and its aphelion is at the outer 
edge of the main belt.

It will approach within 0.045 AU on July 27, 2012.  Our SNR estimates suggest that it will be 
a moderately strong radar target at Goldstone.  The view periods of 2006 CF and 2002 AM31 overlap, so we are planning 
to devote a fraction of our time for 2002 AM31 to observe 2006 CF.

2006 CF may be CW-only target unless it turns out to be much larger and/or more slowly rotating
than we expect.

There are no observations of this object planned at Arecibo.

2006 CF has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.

2006 CF is a very bright optical target (~16 mag) until the end of July, but afterward it gets too close to the Sun
for optical observations.
Orbital and Physical Characteristics  
 orbit type               Apollo
 semimajor axis           2.289 AU     
 eccentricity             0.682 
 inclination              4.7 deg       
 perihelion distance      0.727 AU     
 aphelion distance        3.851 AU     
 absolute magnitude (H)   19.9
 diameter                 0.35 km (+-a factor of two) 
 rotation period          unknown
 pole direction           unknown 
 lightcurve amplitude     unknown
 spectral class           unknown

Last update: 2012 July 24

Discovery MPEC

M.P.E.C. 2006-C14                                Issued 2006 Feb. 3, 18:50 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
   on behalf of Commission 20 of the International Astronomical Union by the
          Minor Planet Center, Smithsonian Astrophysical Observatory,
                          Cambridge, MA 02138, U.S.A.

                  Supported in part by the Brinson Foundation
                  Supported in part by the TABASGO Foundation
             Prepared using the Tamkin Foundation Computer Network

                              MPC@CFA.HARVARD.EDU
          URL http://cfa-www.harvard.edu/iau/mpc.html  ISSN 1523-6714

                                    2006 CF

Observations:
     K06C00F* C2006 02 01.27985 09 52 02.25 +17 31 30.6          21.3 V EC014691
     K06C00F  C2006 02 01.30012 09 51 59.69 +17 31 46.7          21.1 V EC014691
     K06C00F  C2006 02 01.31746 09 51 57.44 +17 32 00.6          21.4 V EC014691
     K06C00F 3C2006 02 01.48177 09 51 36.94 +17 34 14.3                 EC014F65
     K06C00F 3C2006 02 01.48301 09 51 36.80 +17 34 15.5          20.2 R EC014F65
     K06C00F 3C2006 02 01.48428 09 51 36.63 +17 34 16.2          20.3 R EC014F65
     K06C00F 3C2006 02 01.48550 09 51 36.45 +17 34 17.8                 EC014F65
     K06C00F  C2006 02 02.34813 09 49 50.05 +17 45 35.2          20.7 V EC014G96
     K06C00F  C2006 02 02.35439 09 49 49.26 +17 45 39.8          20.2 V EC014G96
     K06C00F  C2006 02 02.36064 09 49 48.43 +17 45 44.7          20.9 V EC014G96
     K06C00F  C2006 02 02.36686 09 49 47.67 +17 45 49.7          20.9 V EC014G96
     K06C00F  C2006 02 03.28568 09 47 55.33 +17 57 37.4          21.1 R EC014734
     K06C00F  C2006 02 03.29775 09 47 53.82 +17 57 46.3          21.0 R EC014734
     K06C00F  C2006 02 03.30955 09 47 52.35 +17 57 55.5          21.1 R EC014734
     K06C00F  C2006 02 03.51605 09 47 26.67 +18 00 32.6                 EC014291
     K06C00F  C2006 02 03.52054 09 47 26.09 +18 00 35.8                 EC014291
     K06C00F  C2006 02 03.52518 09 47 25.52 +18 00 39.1                 EC014291

Observer details:
291 LPL/Spacewatch II.  Observer J. V. Scotti.  1.8-m f/2.7 reflector + CCD.
691 Steward Observatory, Kitt Peak.  Observer R. S. McMillan.  0.9-m f/3
    reflector + CCD.
734 Farpoint Observatory.  Observer G. Hug.  0.7-m reflector + CCD.
F65 Haleakala-Faulkes Telescope North.  Observers C. A. Sawyer, C. J. Barry,
    M. S. S. Cooke, A. S. E. Allen, O. E. D. Fincham, N. P. Lurie,
    G. A. Mayhew, M. J. Fitch, M. E. Morgan, L. M. Voigt, D. M. Tanton,
    A. D. Taylor.  2.0-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey.  Observer R. Hill.  Measurers E. C. Beshore,
    E. J. Christensen, G. J. Garradd, A. D. Grauer, R. E. Hill, R. A. Kowalski,
    S. M. Larson, R. H. McNaught.  1.5-m reflector + CCD.

Orbital elements:
2006 CF                                             PHA, Earth MOID = 0.0172 AU
Epoch 2006 Mar. 6.0 TT = JDT 2453800.5                  MPC
M  40.92338              (2000.0)            P               Q
n   0.26975402     Peri.  266.12572     +0.93792786     -0.33808140
a   2.3722335      Node   113.62083     +0.34219996     +0.86571274
e   0.7009794      Incl.    4.84662     +0.05648473     +0.36911030
P   3.65           H   19.6           G   0.15           U   9
Residuals in seconds of arc
060201 691  0.0   0.2+    060201 F65  0.1-  0.7+    060203 734  0.2+  0.2-
060201 691  0.3+  0.1-    060202 G96  0.1-  0.1-    060203 734  0.3+  0.0
060201 691  0.1-  0.2-    060202 G96  0.0   0.4-    060203 291  0.1+  0.5+
060201 F65  0.1+  0.2+    060202 G96  0.5-  0.4-    060203 291  0.2-  0.4+
060201 F65  0.3+  0.4+    060202 G96  0.1-  0.2-    060203 291  0.2-  0.2+
060201 F65  0.2+  0.1+    060203 734  0.1+  0.1+

Ephemeris:
2006 CF                  a,e,i = 2.37, 0.70, 5                   q = 0.7093
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2006 02 04    09 46.48   +18 06.7    0.844    1.824   171.0     4.8    20.9
2006 02 14    09 27.79   +19 53.2    0.936    1.919   171.5     4.4    21.3
2006 02 24    09 13.14   +21 03.3    1.056    2.010   158.7    10.3    21.9
2006 03 06    09 03.28   +21 41.6    1.199    2.099   146.5    15.1    22.4
2006 03 16    08 58.07   +21 54.9    1.362    2.185   135.4    18.7    22.9

Kyle E. Smalley              (C) Copyright 2006 MPC           M.P.E.C. 2006-C14



SNR Calculation

Target Name:   2006 CF

D =         0.35 km (an educated guess)
Period =    2.2 h   (a conservative guess)
OC albedo = 0.1
 
                UT                             #             max
 start date    window      RA, dec   dist    runs        SNR   SNR/run
----------------------------------------------------------------------
2012 Jul 24  08:13-14:13  354, -21  0.058     177         33         3
2012 Jul 25  08:48-14:57    4, -20  0.051     201         52         4
2012 Jul 26  09:26-15:55   17, -19  0.047     229         76         5
2012 Jul 27  10:05-17:03   32, -16  0.045     255         94         6
2012 Jul 28  10:40-18:12   46, -12  0.046     270         92         6
2012 Jul 29  11:10-19:11   58,  -8  0.050     270         73         5
2012 Jul 30  11:34-19:58   68,  -4  0.056     256         50         3
 
Goldstone SNRs assume Ptx = 450 kW.  Only one klystron is functional, so 
the transmitter power will be ~250 kW. 

Track Assignments


Goldstone tracks:

        UT          UT          PST                    Duration    Round-trip     
DOY     Date        TX Window   TX Window                hh:mm     time (sec)     SNR/Run 
---     ----        ---------   ---------              ---------    ---------     -------
209     Jul 27      1005-1330   0305-0630  Jul 27        03:25        45.4           6
210     Jul 28      1050-1510   0350-0810  Jul 28        04:20        46.2           6
211     Jul 29      1110-1910   0410-1210  Jul 29        07:00        49.9           5 
 
We also plan to observe 2002 AM31 on July 27, 28, and 29 and 2012 OQ on July 27 and 28.


Uncertainties

From Jon Giorgini, 2002-Jul-23, Solution #21: 140 optical measurements (1999-Feb-6 to 2012-Jul-20)

Formal 3-sigma X-band uncertainties:

Date__(UT)__HR:MN  POS_3sigma   DOP_X_3sig  RT_delay_3sig
2012-Jul-26 00:00       4.120        21.60       0.001048
2012-Jul-27 00:00       5.319        29.36       0.000806
2012-Jul-28 00:00       6.089        33.83       0.000511
2012-Jul-29 00:00       6.162        32.79       0.000244
2012-Jul-30 00:00       5.669        27.82       0.000253

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

Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illuminations:

 Date__(UT)__HR:MN     R.A._(J2000.0)_DEC.  APmag            delta      deldot    S-O-T /r  T-O-M/Illu%
 2012-Jul-21 00:00 Am  331.79268 -20.12984  15.97 0.08651028461554 -16.7320496 150.7627 /L  164.7/  3.6
 2012-Jul-22 00:00 Am  336.39574 -20.51935  15.80 0.07731803591039 -15.8668250 147.4204 /L  164.3/  8.5
 2012-Jul-23 00:00 Am  342.19834 -20.83894  15.65 0.06870726062077 -14.6812378 142.9528 /L  159.2/ 15.4
 2012-Jul-24 00:00 Am  349.56884 -20.96524  15.53 0.06090242182057 -13.0192635 137.0148 /L  153.0/ 24.2
 2012-Jul-25 00:00 Am  358.88521 -20.67410  15.47 0.05423078347318 -10.6771668 129.2293 /L  147.4/ 34.4
 2012-Jul-26 00:00 Am   10.33283 -19.62835  15.52 0.04913620916423  -7.4633834 119.3398 /L  143.4/ 45.6
 2012-Jul-27 00:00 Am   23.54243 -17.49508  15.72 0.04612764421246  -3.3733220 107.5285 /L  141.5/ 57.2
 2012-Jul-28 00:00 Am   37.37008 -14.25208  16.11 0.04560789260636   1.1995405  94.7156 /L  141.5/ 68.5
 2012-Jul-29 00:00 Am   50.32910 -10.38128  16.68 0.04765185735696   5.5527962  82.3407 /L  142.4/ 78.8
 2012-Jul-30 00:00 Am   61.40706  -6.56575  17.37 0.05195617151700   9.1320091  71.5923 /L  143.0/ 87.6
 2012-Jul-31 00:00 Am   70.36339  -3.24890  18.10 0.05802234675290  11.8004074  62.9194 /L  141.7/ 94.2
 2012-Aug-01 00:00 Am   77.44194  -0.54981   n.a. 0.06536724743446  13.7019047  56.1907 /L  137.9/ 98.4
 2012-Aug-02 00:00 Am   83.02869   1.59129   n.a. 0.07361705370453  15.0474540  51.0504 /L  131.8/ 99.9
 2012-Aug-03 00:00 Am   87.48092   3.28511   n.a. 0.08251049925278  16.0142137  47.1345 /L  124.0/ 98.8

Setups


The current solution has substantial Doppler uncertainties so we expect to see 
a correction up to a few tens of Hz to the initial solution.  
We don't know the rotation period or diameter of
this object, so we will start with a standard CW setup below:

CW setup:
---------------------------------------------------------------------------
TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           2
Dwells:                   20                   
Bandwidth:                4000 Hz 
Sampling interval:        2500 x 0.1 usec
VME FFT for PSD files:    2048 for 1.95 Hz resolution 

Ranging setups:
---------------------------------------------------------------------------
10-usec
baud             10 usec
code            127
PRP            1270 usec
FFT             128   
ncoh              1 
bandwidth       787 Hz   
resolution      6.15 Hz
TXOFF          +100Hz  (echo in bin 64+16=80)
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
FFT             128  
ncoh              1 
bandwidth       716 Hz   
resolution      5.6 Hz
TXOFF          +100 Hz  (echo in bin 64+18=82) 
-------------------------------------------------------------------------
1-usec 
baud            1 usec
code            255
FFT             128
ncoh             6
bandwidth        654 Hz   
resolution       5.1 Hz
TXOFF           +80 Hz -> echo would be centered at 64 + 16 = 80
-------------------------------------------------------------------------------
0.25-usec ranging 
baud            0.25 usec
code            255
FFT             128
ncoh             16
bandwidth       980  Hz     
resolution       7.7 Hz
TXOFF          +80 Hz -> echo would be centered at 64 + 10 = 74
-------------------------------------------------------------------------------
0.125-usec ranging 
baud            0.125 usec
code            255
FFT             128
ncoh             32
bandwidth       980  Hz     
resolution       7.7 Hz
TXOFF          +80 Hz -> echo would be centered at 64 + 10 = 74

_____________________________________________________________________
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 aardvark:/export/data0/2006CF/raw/

2006 CF POINTING:

  OSOD and predicts are on aardvark:

/export/data3/osod/ops/2006cf/PRDX.OUT.14v-14-14.s21 
                              /PUNCH.OUT.14v-14-14.s21
                              /EPH.OUT.s21


POINTING  
                                                          TX Offsets    
Date (UTC)   DOY  hhmmss    RA        Dec         Macro   LHA     Dec    RTT    OSOD
2012 07 27   209  100000    29.4791  -16.2313       A                    45.5   s21 
2012 07 27   209  110000    30.0503  -16.1003       A                    45.4 
2012 07 27   209  120000    30.6196  -15.9668       A    -7.20   1.60    45.4 
2012 07 27   209  130000    31.1877  -15.8310       A                    45.4 
2012 07 27   209  140000    31.7549  -15.6928       A                    45.4 

Transmit offsets are given in millidegrees.  


PRDX.OUT.14f-14-14.s21 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL 2012 JUL 27 10:00 45.4565321803 89349.413 309.1228 -16.2313 29.479 19.369 2012 JUL 27 10:10 45.4503508619 87019.624 311.5343 -16.2096 29.574 20.917 2012 JUL 27 10:20 45.4443338099 84662.517 313.9458 -16.1879 29.670 22.425 2012 JUL 27 10:30 45.4384828977 82279.102 316.3574 -16.1661 29.765 23.890 2012 JUL 27 10:40 45.4327999457 79870.435 318.7691 -16.1442 29.860 25.308 2012 JUL 27 10:50 45.4272866725 77437.619 321.1809 -16.1223 29.955 26.677 2012 JUL 27 11:00 45.4219447378 74981.796 323.5927 -16.1003 30.050 27.992 2012 JUL 27 11:10 45.4167757196 72504.151 326.0045 -16.0782 30.145 29.251 2012 JUL 27 11:20 45.4117810853 70005.905 328.4164 -16.0561 30.240 30.449 2012 JUL 27 11:30 45.4069622549 67488.317 330.8283 -16.0339 30.335 31.583 2012 JUL 27 11:40 45.4023205324 64952.679 333.2403 -16.0116 30.430 32.648 2012 JUL 27 11:50 45.3978571305 62400.315 335.6523 -15.9892 30.525 33.642 2012 JUL 27 12:00 45.3935731809 59832.578 338.0644 -15.9668 30.620 34.559 2012 JUL 27 12:10 45.3894697130 57250.848 340.4765 -15.9444 30.714 35.397 2012 JUL 27 12:20 45.3855476586 54656.530 342.8886 -15.9218 30.809 36.150 2012 JUL 27 12:30 45.3818078436 52051.051 345.3008 -15.8992 30.904 36.816 2012 JUL 27 12:40 45.3782510063 49435.858 347.7130 -15.8766 30.998 37.391 2012 JUL 27 12:50 45.3748777767 46812.414 350.1252 -15.8538 31.093 37.872 2012 JUL 27 13:00 45.3716886746 44182.198 352.5374 -15.8310 31.188 38.257 2012 JUL 27 13:10 45.3686841359 41546.699 354.9497 -15.8082 31.282 38.543 2012 JUL 27 13:20 45.3658644619 38907.416 357.3620 -15.7852 31.377 38.728 2012 JUL 27 13:30 45.3632298750 36265.856 359.7743 -15.7622 31.471 38.811 2012 JUL 27 13:40 45.3607804786 33623.528 2.1866 -15.7392 31.566 38.793 2012 JUL 27 13:50 45.3585162769 30981.943 4.5989 -15.7160 31.660 38.672 2012 JUL 27 14:00 45.3564371648 28342.611 7.0112 -15.6928 31.755 38.451

2006 CF GOLDSTONE MASTERLOG

============================================================================== Receive TX Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes ------------------------------------------------------------------------------
Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 183-601 | FAX: (818) 393-4445 Jet Propulsion Laboratory | email: lance.benner@jpl.nasa.gov California Institute of Technology | Plan: To live long and prosper Pasadena, CA 91109-8099 http://echo.jpl.nasa.gov/asteroids/2006CF/2006CF_planning.html

Asteroid Radar Astronomy
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