2006 GY2 Planning
Background
2006 GY2 was discovered by LINEAR on April 9, 2006. It will make a very close approach
within 0.017 AU (only 6.6 lunar distances) on May 16. Its physical properties are unknown,
but its absolute magnitude of 18.6 suggests a diameter within a factor of two of 600 meters.
Using past experience as a guide, there is a 1/6 chance that it is a binary.
The PI of these observations is Dr. Michael Nolan at Arecibo Observatory.
Goldstone observations are scheduled on May 13 and 16, and Arecibo observations are
scheduled on May 15 and 16. The Goldstone SNRs will increase rapidly from the first to the
third track as the asteroid rapidly approaches Earth.
Due to the proximity of its orbit to Earth and its diameter, 2006 GY2 has been classified as a
"Potentially Hazardous Asteroid" by the Minor Planet Center.
Orbital and Physical Characteristics
orbit type Apollo
semimajor axis 1.853 AU
eccentricity 0.494
inclination 30.6°
perihelion distance 0.938 AU
aphelion distance 2.768 AU
absolute magnitude (H) 18.6
diameter 600 m +/- a factor of two (educated guesses)
rotation period unknown
pole direction unknown
lightcurve amplitude unknown
spectral class unknown
Last updated: 2006 May 17
Discovery
M.P.E.C. 2006-G37 Issued 2006 Apr. 10, 15:10 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 GY2
Observations:
K06G02Y* C2006 04 09.33747 16 10 34.87 +45 23 40.5 19.3 EG037704
K06G02Y C2006 04 09.34745 16 10 35.10 +45 23 47.9 19.3 EG037704
K06G02Y C2006 04 09.35765 16 10 35.29 +45 23 56.1 19.3 EG037704
K06G02Y C2006 04 09.36767 16 10 35.45 +45 24 03.6 19.0 EG037704
K06G02Y C2006 04 10.30868 16 11 00.96 +45 35 40.1 18.8 R EG037H36
K06G02Y C2006 04 10.31593 16 11 01.16 +45 35 44.9 18.8 R EG037H36
K06G02Y C2006 04 10.32317 16 11 01.22 +45 35 51.4 18.9 R EG037H36
K06G02Y C2006 04 10.33400 16 11 01.13 +45 36 00.8 19.4 R EG037850
K06G02Y C2006 04 10.34910 16 11 01.38 +45 36 12.0 19.6 R EG037850
K06G02Y C2006 04 10.43166 16 11 02.58 +45 37 12.7 19.3 R EG037850
Observer details:
704 Lincoln Laboratory ETS, New Mexico. Observers M. Bezpalko, L. Manguso,
D. Torres, R. Kracke, M. Blythe, H. Love, G. Spitz. Measurers J. Stuart,
J. Kommers. 1.0-m f/2.15 reflector + CCD.
850 Cordell-Lorenz Observatory, Sewanee. Observers D. T. Durig, B. T. Scott.
0.30-m f/2.5 Schmidt-Cassegrain + 765x510 CCD.
H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.30-m
Schmidt-Cassegrain + CCD.
Orbital elements:
2006 GY2 PHA, Earth MOID = 0.0059 AU
Epoch 2006 Mar. 6.0 TT = JDT 2453800.5 MPC
M 321.42640 (2000.0) P Q
n 0.38351304 Peri. 216.05497 -0.04823908 +0.90740716
a 1.8762151 Node 55.03586 -0.75488968 +0.24057643
e 0.4987894 Incl. 30.62517 -0.65407535 -0.34457979
P 2.57 H 19.1 G 0.15 U 9
Residuals in seconds of arc
060409 704 0.3- 0.2+ 060410 H36 0.3- 0.5+ 060410 850 0.1+ 0.5-
060409 704 0.2+ 0.2- 060410 H36 0.5+ 0.4- 060410 850 0.1- 0.2+
060409 704 0.2+ 0.1+ 060410 H36 0.1- 0.5+
060409 704 0.1- 0.1- 060410 850 0.2- 0.3-
Ephemeris:
2006 GY2 a,e,i = 1.88, 0.50, 31 q = 0.9404
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2006 04 05 16 08.11 +44 29.6 0.458 1.256 113.6 46.9 19.7
2006 04 07 16 09.34 +44 54.6 0.436 1.242 113.6 47.6 19.6
2006 04 09 16 10.41 +45 19.4 0.415 1.228 113.6 48.4 19.5
2006 04 11 16 11.29 +45 44.2 0.394 1.214 113.5 49.2 19.3
2006 04 13 16 11.98 +46 08.8 0.372 1.200 113.5 50.0 19.2
2006 04 15 16 12.46 +46 33.4 0.351 1.187 113.4 50.9 19.1
2006 04 17 16 12.71 +46 58.0 0.329 1.174 113.3 51.8 18.9
2006 04 19 16 12.71 +47 22.8 0.308 1.161 113.2 52.7 18.8
2006 04 21 16 12.41 +47 47.8 0.286 1.148 113.0 53.7 18.6
2006 04 23 16 11.78 +48 13.3 0.265 1.135 112.9 54.7 18.5
2006 04 25 16 10.74 +48 39.4 0.243 1.122 112.7 55.8 18.3
2006 04 27 16 09.22 +49 06.7 0.221 1.110 112.5 56.9 18.1
2006 04 29 16 07.07 +49 35.6 0.200 1.098 112.2 58.1 17.9
2006 05 01 16 04.12 +50 07.0 0.178 1.086 111.9 59.4 17.7
2006 05 03 16 00.04 +50 42.3 0.156 1.075 111.4 60.8 17.4
2006 05 05 15 54.31 +51 23.5 0.134 1.064 110.9 62.3 17.1
2006 05 07 15 45.93 +52 14.2 0.112 1.053 110.2 64.1 16.7
2006 05 09 15 32.80 +53 20.3 0.0901 1.042 109.1 66.2 16.3
2006 05 11 15 09.88 +54 51.1 0.0684 1.032 107.4 69.0 15.8
2006 05 13 14 21.91 +56 50.1 0.0472 1.023 104.0 73.5 15.1
2006 05 15 12 14.41 +56 07.9 0.0278 1.014 94.9 83.5 14.3
2006 05 17 08 28.17 +21 54.2 0.0176 1.005 68.2 110.9 14.6
2006 05 19 06 35.43 -19 54.3 0.0292 0.996 58.0 120.6 16.3
2006 05 21 05 51.98 -32 40.6 0.0489 0.989 60.3 117.3 17.2
2006 05 23 05 30.53 -37 34.1 0.0702 0.981 62.0 114.4 17.7
2006 05 25 05 17.91 -40 00.1 0.0919 0.975 63.1 112.1 18.2
Timothy B. Spahr (C) Copyright 2006 MPC M.P.E.C. 2006-G37
SNR Calculation
Target Name: 2006 GY2
HMag: 18.6
Diameter: 0.6 km
Period: 4 h (a standard guess)
------------GOLDSTONE---------- -------------ARECIBO-----------
Max Max
Dat Run UTC Dat Run UTC
Date RA Decl Delta Runs SNR SNR Window Runs SNR SNR Window
2006 5 9 232 54 0.082 307 37 2 1:18-15:11 0 0 0 -
2006 5 10 230 55 0.071 353 66 4 0:54-15:00 0 0 0 -
2006 5 11 225 56 0.060 414 130 7 0:30-14:41 0 0 0 -
2006 5 12 219 57 0.050 497 270 14 23:53-38:23 0 0 0 -
2006 5 13 209 59 0.039 615 680 31 23:00-37:42 0 0 0 -
2006 5 14 191 59 0.030 700 2000 82 21:41-36:30 0 0 0 -
2006 5 15 161 53 0.022 700 6200 250 20:11-34:00 0 0 0 -
2006 5 16 130 31 0.017 700 13000 550 19:11-30:41 161 263000 23000 20:30-22:36
2006 5 17 110 2 0.019 619 8100 360 19:06-28:00 111 128000 14000 19:23-20:53
2006 5 18 99 -16 0.027 388 1900 110 19:23-26:00 0 0 0 -
2006 5 19 92 -26 0.036 245 480 34 19:48-24:30 0 0 0 -
2006 5 20 87 -31 0.046 160 150 13 20:18-23:18 0 0 0 -
2006 5 21 84 -34 0.057 107 56 6 21:18-21:41 0 0 0 -
2006 5 22 82 -37 0.067 70 24 3 - 0 0 0 -
Track Assignments
2006 GY2 tracks
UT UT PDT AST Duration Delta
DOY Date TX Window TX Window TX Window hh:mm (seconds)
--- ---- --------- --------- --------- ------- ---------
133 May 13 0700-1300 0000-0600 May 13 0300-1000 May 13 6:00 35
134-135 May 14-15 2305-0505 1605-2205 May 14 1905-0105 May 14-15 6:00 21 CANCELLED
136 May 16 0230-0600 1930-2300 May 15 2230-0200 May 15-16 3:30 17
Arecibo tracks
135 May 15 2102-2239 1402-1539 May 15 1702-1839 May 15 1:37 17
136 May 16 1916-2117 1216-1417 May 16 1516-1717 May 16 2:01 19
Interleaved Schedule
UTC DOY DOY DOY DOY
hhmm 133 134 135 136
0000 G
0100 G
0200 G G
0300 G G
0400 G G
0500 G G
0600 G
0700 G
0800 G
0900 G
1000 G
1100 G
1200 G
1300 G
1400
1500
1600
1700
1800
1900 A
2000 A
2100 A A
2200 A
2300 G A
Uncertainties
Solution 4, # obs: 24 (5 days)
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig
2006-May-13 00:00 * 208.79746 58.55700 .039174545570942 14129.9776 13412.25 47971.48 7.682956
2006-May-14 00:00 * 190.59088 58.70044 .029534711932430 25952.9061 12186.04 43585.72 6.863283
2006-May-15 00:00 * 161.06268 52.76133 .021406413246048 51578.3388 9050.62 32371.26 5.249576
2006-May-16 00:00 * 129.98643 31.10582 .017115903002189 84271.5207 1577.79 5643.26 1.791113
2006-May-17 00:00 * 109.80903 1.89306 .019411249924351 68508.1929 7216.78 25812.20 2.626199
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Solution 7, # obs: 39 (9 days)
2006-May-13 00:00 * 208.77551 58.57272 .039223842129536 3253.28914 5211.87 18641.26 2.119300
2006-May-14 00:00 * 190.53724 58.71639 .029567734035382 6030.94320 4732.06 16925.10 1.851264
2006-May-15 00:00 * 160.96542 52.75769 .021429188617278 12080.0801 3507.67 12545.86 1.410584
2006-May-16 00:00 * 129.89222 31.05892 .017143284205182 19841.6510 595.94 2131.48 0.570085
2006-May-17 00:00 * 109.74425 1.85005 .019458585542678 16181.7909 2819.21 10083.43 0.524880
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
From Horizons, 2006 April 24
Solution 10, # obs: 77 (15 days)
2006-May-13 00:00 208.93276 58.53626 .039337214914603 649.865165 1680.88 6011.97 0.515144
2006-May-14 00:00 190.85462 58.70253 .029679346136878 1220.19323 1527.15 5462.15 0.441890
2006-May-15 00:00 161.46940 52.88625 .021517642427173 2475.11131 1136.94 4066.50 0.337697
2006-May-16 00:00 130.33523 31.45146 .017156866790793 4142.34064 206.96 740.25 0.160847
2006-May-17 00:00 110.02639 2.19965 .019371432678295 3451.33602 898.11 3212.25 0.111076
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
From Horizons, 2006 May 01
Solution 16, # obs: 117 (21 days)
2006 May-13 00:00 * 209.05685 58.51572 .039470731080769 124.730386 684.24 2447.32 0.144549
2006-May-14 00:00 * 191.09942 58.70224 .029801260873623 239.212971 622.08 2224.97 0.119269
2006-May-15 00:00 * 161.85279 52.99941 .021612868511713 495.361099 464.93 1662.93 0.090593
2006-May-16 00:00 * 130.66943 31.77486 .017188622955065 850.093192 89.72 320.89 0.053790
2006-May-17 00:00 * 110.23676 2.49177 .019325032687602 727.750778 361.02 1291.25 0.042302
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
From Jon Giorgini, 2006 May 11
With new reported optical data, solution #25 was computed for 2006 GY2.
Based on 204 optical observations spanning 2006-Apr-9 to 2006-May-9,
files and nominal predicts have been updated.
Formal 3-sigma uncertainties are as follows:
Date__(UT)__HR:MN POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig
2006-May-12 00:00 4.28713429 355.94 1273.08 0.063599
2006-May-13 00:00 8.43262619 341.82 1222.59 0.050949
2006-May-14 00:00 18.0442320 310.80 1111.62 0.039028
2006-May-15 00:00 41.2000387 232.40 831.24 0.028682
2006-May-16 00:00 77.0763912 45.19 161.63 0.022177
2006-May-17 00:00 71.2223108 179.70 642.74 0.023686
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
From OSOD, 2006 May 16
With two Dopplers and three ranges from Goldstone, and one Doppler and one range from
Arecibo, solution 35 3-sigma uncertainties are:
UTC
hh:mm DOP_X-sig RT_delay-sig
2006 May 16 02:00 1.2 10
03:00 1.2 12
04:00 1.1 14
05:00 1.1 16
06:00 1.1 18
Setups
Plans for the May 16 track
--------------------------
We will start with solution 35
On May 16 our plan is to do 1/8 usec imaging for the as much of the track as possible.
However, first we need to update the orbit, so we'll start with 1 usec and then go to 1/8th.
127 x 64 1-usec single sample
------------------------------
baud 1 usec
code 127
gates 127
PRP 127
FFT 64
CLT 4
ncoh 15
bandwidth 525 Hz
resolution 8.2 Hz
TXOFF +100 -> echo would be centered at +12.2 bins or in bin 32 + 12.2 = 44
For 1/8 usec, let's use this setup:
0.125-usec imaging
------------------
baud 0.125 usec
code 127
gates 127
FFT 256 <== NOTE THE FFT LENGTH!
ncoh 984
bandwidth 64.016 Hz
resolution 0.2501 Hz
TXOFF +16 Hz
We don't plan to do any CW observations on the May 16 track.
Arecibo observation late on May 15 UTC showed a bandwidth of close to 18 Hz
when converted to X-band, so this setup will place _a lot_ of Doppler bins
on the target.
Standard CW setup
-----------------
TX polarization RCP
RCV polarization LCP
Frequencies: 2
Dwell: 10 seconds
Bandwidth: 4000 Hz
Sampling interval: 250 x 0.1 usec
VME FFT for PSD files: 4096 for 0.98-Hz resolution
Possible ranging setups:
---------------------------------------------------------------------------
127 x 64 10-usec single sample
baud 10 usec
code 127
gates 127
FFT 64
CLT 2 (VME)
ncoh 1
bandwidth 787.4 Hz
resolution 12.30 Hz
TXOFF +100 Hz -> echo will be centered at +8.1 bins or in bin 32 + 8.1 = 40
---------------------------------------------------------------------------
127 x 64 11-usec single sample, 11.2-Hz resolution.
baud 11 usec
code 127
gates 127
PRP 1397
FFT 64
CLT 2 (VME)
ncoh 1
bandwidth 715.8 Hz
resolution 11.18 Hz
TXOFF +100 Hz --> echo will be centered at +8.9 bins or in bin 32 + 8.9 = 41
-------------------------------------------------------------------------
127 x 64 7-usec single sample
------------------------------
baud 7 usec
code 127
gates 127
PRP 889
FFT 64
CLT ??
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 4
ncoh 15
bandwidth 525 Hz
resolution 8.2 Hz
TXOFF +100 -> echo would be centered at +12.2 bins or in bin 32 + 12.2 = 44
-------------------------------------------------------------------------------
0.125-usec ranging (left over from the 1992 UY4 observations in August, 2005)
------------------
setup JX1XS001 revised
baud 0.125 usec
code 127
gates 127
FFT 64
ncoh 984
bandwidth 64.016384 Hz
resolution 1.000256 Hz
TXOFF We used 10 Hz, placing COM in cell 32+10=42
Henceforth use 15 Hz, to put COM in 32+15=47
incoh sums 4 looks=> 8 sec/record => expect records per run ~ RTT/8
PFS CLT gate 21
_____________________________________________________________________
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/2006GY2/raw/
2006 GY2 POINTING:
OSOD and predicts are at Goldstone on stealth:
/export/data2/osod/ops/2006gy2/PRDX.OUT.s35
/PUNCH.OUT.s35
/EPH.OUT.s35
and have been copied to:
/export/data0/rosema/2006GY2/support/
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2006 05 16 136 020000 128.4237 29.2703 A 17.1 35
2006 05 16 136 030000 127.3482 28.0022 A 0.0051 -0.0061 17.0
2006 05 16 136 040000 126.3012 26.7207 AB 17.0
2006 05 16 136 050000 125.2844 25.4297 B 0.0047 -0.0062 17.0
2006 05 16 136 060000 124.2990 24.1327 B 17.1
PRDX.OUT.s35
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2006 MAY 16 02:30 17.0540681809 50454.158 26.4003 28.6381 127.883 66.694
2006 MAY 16 02:40 17.0507379020 44571.827 29.0860 28.4265 127.704 64.446
2006 MAY 16 02:50 17.0478194566 38703.759 31.7710 28.2146 127.526 62.190
2006 MAY 16 03:00 17.0453117556 32852.283 34.4551 28.0022 127.348 59.929
2006 MAY 16 03:10 17.0432135555 27019.689 37.1385 27.7894 127.172 57.663
2006 MAY 16 03:20 17.0415234543 21208.219 39.8211 27.5763 126.996 55.396
2006 MAY 16 03:30 17.0402399014 15420.070 42.5029 27.3629 126.821 53.126
2006 MAY 16 03:40 17.0393611724 9657.382 45.1838 27.1491 126.647 50.856
2006 MAY 16 03:50 17.0388854167 3922.239 47.8640 26.9351 126.474 48.586
2006 MAY 16 04:00 17.0388106326 -1783.340 50.5432 26.7207 126.301 46.317
2006 MAY 16 04:10 17.0391346794 -7457.402 53.2217 26.5061 126.130 44.050
2006 MAY 16 04:20 17.0398552815 -13098.065 55.8993 26.2913 125.959 41.785
2006 MAY 16 04:30 17.0409700345 -18703.522 58.5760 26.0762 125.789 39.523
2006 MAY 16 04:40 17.0424764097 -24272.047 61.2519 25.8609 125.620 37.265
2006 MAY 16 04:50 17.0443717607 -29801.993 63.9269 25.6454 125.452 35.011
2006 MAY 16 05:00 17.0466533212 -35291.801 66.6011 25.4297 125.284 32.763
2006 MAY 16 05:10 17.0493182402 -40740.000 69.2744 25.2138 125.118 30.519
2006 MAY 16 05:20 17.0523635385 -46145.212 71.9468 24.9978 124.952 28.283
2006 MAY 16 05:30 17.0557861574 -51506.152 74.6183 24.7817 124.788 26.053
2006 MAY 16 05:40 17.0595829592 -56821.632 77.2889 24.5655 124.624 23.832
2006 MAY 16 05:50 17.0637507188 -62090.564 79.9587 24.3491 124.461 21.619
2006 MAY 16 06:00 17.0682861386 -67311.959 82.6276 24.1327 124.299 19.415
GOLDSTONE MASTERLOG
==============================================================================
RCV TX
setup runs start -stop osod OFFSET Poln Notes
------------------------------------------------------------------------------
May 13
CW 20 kHz, 2 hops, 8192 FFT 11 070629-071924 25 none RCP VME only; PFS problem
12 072204-073615 25 none RCP VME & PFS
CW 4 kHz, 2 hops, 8192 FFT 10 075504-080643 27 none RCP VME & PFS
10 usec, 127 code, ncoh=1,64 FFT 4 083513-084315 27 +100 RCP VME & PFS
11 usec, 127 code, ncoh=1,64 FFT 3 090307-090610 27 +100 RCP VME & PFS
11 usec, 127 code, ncoh=1,64 FFT 3 094057-094359 29 +100 RCP VME & PFS
1 usec, 127 code, ncoh=15,64FFT 2 100239-100426 29 +100 RCP VME & PFS
1/8 usec,127 code, ncoh=1968,64FFT 4? 105511-105927 29 +8 Hz RCP VME & PFS
1/8 usec,127 code, ncoh=1968,64FFT 98? 110007-130026 29 +8 Hz,+6.25usec RCP VME & PFS
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
May 16
1 usec, 127 code, ncoh=15,64FFT 1 030230-030245 35 +100 RCP VME & PFS
1/8 usec,127 code, ncoh=984,64FFT 259 032456-060003 35 +8 Hz RCP VME & PFS
==============================================================================
RADAR ASTROMETRY
2006 05 13 07:10:00 P 971389.7D0 5.0 8560.D6 -14 -14 Benner, L.A.M.
Correction of +518 Hz to soln 25 from several CW runs with
2.4 Hz res'n. Bandwidth is about 8 Hz.
2006 05 13 08:00:00 P 966358.2D0 2.0 8560.D6 -14 -14 Benner, L.A.M.
Correction of -2 Hz to soln 27 from 10 cw runs w/0.49 Hz res'n
2006 05 13 08:50:00 R 35.724788 20.0 8560.D6 -14 Benner, L.A.M.
Correction of -1901 usec to soln 27 from 10 and 11 usec.
2006 05 13 10:00:00 R 35.254532 1.0 8560.D6 -14 Benner, L.A.M.
Correction of -3 usec to soln 29 from 1 usec ranging.
Visible extent is only one range gate.
2006 05 13 11:50:00 R 34.521046 0.5 8560.D6 -14 Benner, L.A.M.
Correction of -3 usec to soln 29 from 1/8 usec imaging. Placed
COM at TE of the echo, which is about 8 gates deep.
2006 05 16 04:50:00 R 17.04437301 0.5 8560.D6 -14 Benner, L.A.M.
Corr'n of +1.25 us to soln 35 from 1 us and 1/8 us ranging. Placed
COM at TE when primary and secondary are aligned in range.
==============================================================================
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
http://echo.jpl.nasa.gov/asteroids/2006GY2/html/2006GY2_planning.html
Asteroid Radar Astronomy