2005 OE3 Planning
Background
2005 OE3 was discovered by the Siding Spring Survey (Australia) on July 29, 2005.
It approached within 0.028 AU (11 lunar distances) on August 16. Its
absolute magnitude of 20.3 suggests a diameter within a factor of two of 300 meters.
Its rotation period, pole direction, and taxonomic class (composition) are unknown.
Due to its size and the proximity of its orbit to that of Earth, the Minor
Planet Center has classified 2005 OE3 as a "Potentially Hazardous Asteroid."
We have only one track to observe this object: August 21. 2005 OE3 should be strong
enough for coarse resolution ranging and, if we're lucky, perhaps coarse-resolution
delay-Doppler imaging.
Orbital and Physical Characteristics
orbit type Apollo
semimajor axis 1.567 AU
eccentricity 0.428
inclination 25.4°
perihelion distance 0.896 AU
aphelion distance 2.238 AU
absolute magnitude (H) 20.3
diameter unknown
rotation period unknown
pole direction unknown
lightcurve amplitude unknown
spectral class unknown
Last updated: 2005 August 19
Discovery
M.P.E.C. 2005-P03 Issued 2005 Aug. 1, 11:15 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
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2005 OE3
Observations:
K05O03E* C2005 07 29.74397 22 59 53.84 -58 29 26.8 17.9 V EP003E12
K05O03E C2005 07 29.75519 22 59 51.75 -58 29 16.5 18.1 V EP003E12
K05O03E C2005 07 29.76642 22 59 49.74 -58 29 05.9 17.8 V EP003E12
K05O03E C2005 07 29.77773 22 59 47.58 -58 28 55.5 17.9 V EP003E12
K05O03E C2005 07 30.64229 22 57 33.08 -58 16 02.8 18.0 V EP003E12
K05O03E C2005 07 30.64557 22 57 32.36 -58 16 00.1 17.7 V EP003E12
K05O03E C2005 07 30.64879 22 57 31.68 -58 15 57.0 17.9 V EP003E12
K05O03E C2005 07 30.65207 22 57 31.03 -58 15 54.0 18.0 V EP003E12
K05O03E C2005 07 31.21587 22 55 49.16 -58 06 25.7 17.6 R EP003I77
K05O03E C2005 07 31.22114 22 55 47.95 -58 06 20.3 17.7 R EP003I77
K05O03E C2005 07 31.22846 22 55 46.32 -58 06 12.1 17.8 R EP003I77
K05O03E C2005 07 31.55013 22 54 49.57 -57 59 49.2 17.7 R EP003423
K05O03E C2005 07 31.57096 22 54 44.91 -57 59 29.1 17.8 R EP003423
K05O03E C2005 07 31.60548 22 54 37.26 -57 58 54.6 17.8 V EP003E12
K05O03E C2005 07 31.61367 22 54 35.38 -57 58 46.6 18.2 V EP003E12
K05O03E C2005 07 31.61475 22 54 34.87 -57 58 44.0 17.8 R EP003423
K05O03E C2005 07 31.62190 22 54 33.48 -57 58 38.1 18.0 V EP003E12
K05O03E C2005 07 31.63014 22 54 31.57 -57 58 28.9 18.0 V EP003E12
Observer details:
423 North Ryde. Observer S. G. McAndrew. 0.20-m f/4 hyperbolic astrograph
+ CCD.
E12 Siding Spring Survey. Observers G. J. Garradd, E. J. Christensen.
Measurers E. C. Beshore, C. M. Casey, E. J. Christensen, G. J. Garradd,
A. D. Grauer, R. E. Hill, S. M. Larson, R. H. McNaught. 0.5-m Uppsala
Schmidt + CCD.
I77 CEAMIG-REA Observatory, Belo Horizonte. Observers C. Jacques, E. Pimentel.
Measurer C. Jacques. 0.30-m f/3.0 Schmidt-Cassegrain + CCD.
Orbital elements:
2005 OE3 PHA 0.044A
Epoch 2005 July 29.0 TT = JDT 2453580.5 MPC
M 328.17720 (2000.0) P Q
n 0.50368856 Peri. 58.36385 +0.89112501 -0.36546041
a 1.5644487 Node 321.12958 +0.10233980 +0.73932170
e 0.4277422 Incl. 25.37660 +0.44206650 +0.56554585
P 1.96 H 20.1 G 0.15
From 18 observations 2005 July 29-31.
Ephemeris:
2005 OE3 a,e,i = 1.56, 0.43, 25 q = 0.8953
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2005 07 29 23 01.69 -58 38.6 0.178 1.142 131.9 41.4 18.3
2005 07 30 22 59.28 -58 25.5 0.168 1.135 132.4 41.3 18.1
2005 07 31 22 56.48 -58 09.7 0.158 1.129 133.1 41.1 18.0
2005 08 01 22 53.25 -57 50.6 0.149 1.123 133.7 40.8 17.8
2005 08 02 22 49.52 -57 27.7 0.139 1.117 134.5 40.4 17.7
2005 08 03 22 45.23 -56 59.8 0.130 1.111 135.3 40.0 17.5
2005 08 04 22 40.30 -56 25.8 0.120 1.105 136.2 39.4 17.3
2005 08 05 22 34.61 -55 44.0 0.111 1.099 137.3 38.7 17.1
2005 08 06 22 28.05 -54 52.1 0.102 1.093 138.6 37.9 16.9
2005 08 07 22 20.46 -53 46.9 0.0925 1.087 140.1 36.8 16.6
2005 08 08 22 11.65 -52 23.7 0.0834 1.081 141.9 35.4 16.3
2005 08 09 22 01.39 -50 35.6 0.0744 1.075 144.1 33.6 16.0
2005 08 10 21 49.41 -48 12.3 0.0656 1.069 146.8 31.2 15.7
2005 08 11 21 35.36 -44 57.7 0.0570 1.063 150.3 28.2 15.3
2005 08 12 21 18.87 -40 26.3 0.0489 1.058 154.5 24.3 14.8
2005 08 13 20 59.49 -33 58.7 0.0414 1.052 159.5 19.7 14.3
2005 08 14 20 36.82 -24 38.0 0.0350 1.046 163.0 16.4 13.8
2005 08 15 20 10.53 -11 27.1 0.0302 1.041 158.5 20.9 13.6
2005 08 16 19 40.59 +05 17.9 0.0280 1.035 144.3 34.8 13.8
2005 08 17 19 07.41 +22 42.8 0.0289 1.030 127.0 51.7 14.4
2005 08 18 18 32.00 +37 07.4 0.0327 1.025 111.6 66.7 15.1
2005 08 19 17 55.89 +47 18.0 0.0385 1.019 100.0 77.8 15.8
2005 08 20 17 20.79 +53 59.4 0.0455 1.014 91.7 85.7 16.4
2005 08 21 16 48.12 +58 17.9 0.0533 1.009 85.8 91.2 17.0
2005 08 22 16 18.76 +61 04.4 0.0616 1.004 81.4 95.1 17.5
2005 08 23 15 52.98 +62 52.4 0.0701 0.999 78.1 98.0 17.9
2005 08 24 15 30.65 +64 03.1 0.0788 0.994 75.5 100.1 18.2
2005 08 25 15 11.44 +64 49.6 0.0877 0.989 73.4 101.7 18.5
2005 08 26 14 54.91 +65 20.0 0.0966 0.985 71.8 102.9 18.8
2005 08 27 14 40.63 +65 39.7 0.106 0.980 70.4 103.7 19.0
2005 08 28 14 28.24 +65 52.0 0.115 0.976 69.3 104.4 19.2
Timothy B. Spahr (C) Copyright 2005 MPC M.P.E.C. 2005-P03
SNR Calculation
Target Name: 2005 OE3
HMag: 20.1
Diameter: 0.30
Period: 4 (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
2005 8 13 315 -32 0.041 166 78 6 6:05- 8:41 0 0 0 -
2005 8 14 309 -23 0.035 269 203 14 4:17- 9:35 0 0 0 -
2005 8 15 303 -11 0.030 385 460 26 2:47-10:05 0 0 0 -
2005 8 16 295 5 0.028 489 717 36 1:18-10:24 106 13741 1472 1:36- 3:30
2005 8 17 287 23 0.029 554 682 32 23:53-34:36 136 14578 1318 0:36- 3:17
2005 8 18 278 37 0.033 565 441 21 22:36-34:36 55 4214 613 0:48- 1:48
2005 8 19 269 47 0.038 544 246 12 21:23-34:30 0 0 0 -
2005 8 20 260 54 0.045 511 133 7 20:18-34:17 0 0 0 -
2005 8 21 252 58 0.053 475 74 4 19:18-34:00 0 0 0 -
2005 8 22 245 61 0.062 439 42 2 18:30-33:42 0 0 0 -
2005 8 23 238 63 0.070 406 26 1 17:48-33:23 0 0 0 -
Goldstone Track Assignments
2005 OE3 Goldstone track
UT UT PDT
DOY Date TX Window TX Window Duration
--- ---- --------- ------------- --------
233 Aug 21 0035-0830 1735-0130 Aug 20-21 7:55
Uncertainties
From Jon Giorgini: 2005 August 17, solution 16:
With 144 optical observations (2005-Jul-29 to 2005-Aug-16),
solution #16 was computed. Formal 3-sigma X-band uncertainties
are shown below.
Date__(UT)__HR:MN POS_3sigma DOP_X-sig RT_delay-sig
2005-Aug-20 00:00 1.22906514 1463.96 0.090486
2005-Aug-21 00:00 1.21602122 1580.87 0.105986
2005-Aug-22 00:00 1.19752169 1653.55 0.122427
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
From Jon Giorgini, 2005 August 19:
Including the newly reported optical data, 2005 OE3 solution #19
was computed. With 170 optical observations spanning 2005-Jul-29
to 2005-Aug-18, 3-sigma X-band formal uncertainties are:
Date__(UT)__HR:MN POS_3sigma DOP_X-sig RT_delay-sig
2005-Aug-20 00:00 .923289891 1380.69 0.085335
2005-Aug-21 00:00 .924225114 1490.97 0.099956
2005-Aug-22 00:00 .920851221 1559.54 0.115463
Setups
CW Setup
The Doppler uncertainties are large for this object, so let's start with a setup
that gives a wide bandwidth. After the initial CW detection, we'll update the ephemeris and
narrow the bandwidth.
Let's use the same CW setup that we used
on the first two tracks:
TX polarization RCP
RCV polarization LCP
Frequencies: 2
Dwell: 20 seconds
Bandwidth: 40000 Hz (yes, 40 kHz)
Sampling interval: 250 x 0.1 usec
VME FFT for PSD files: 16384 for 2.44-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 used in first UY4 track (DOY 213, Aug. 1)
------------------
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/2005OE3/raw/
2005 OE3 POINTING:
OSOD and predicts are at Goldstone on stealth:
/export/data2/osod/ops/2005oe3/PRDX.OUT.s19
/PUNCH.OUT.s19
/EPH.OUT.s19
and have been copied to:
/export/data0/rosema/2005OE3/support/
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2005 08 21 233 000000 252.7793 58.0175 A 52.9 19
2005 08 21 233 010000 252.4391 58.1677 A 53.2
2005 08 21 233 020000 252.0983 58.3132 A 0.0050 0.0021 53.5
2005 08 21 233 030000 251.7581 58.4539 AB 53.9
2005 08 21 233 040000 251.4200 58.5898 AB 54.2
2005 08 21 233 050000 251.0852 58.7211 B 54.4
2005 08 21 233 060000 250.7550 58.8483 B 0.0050 0.0019 54.9
2005 08 21 233 070000 250.4303 58.9718 B 55.2
2005 08 21 233 080000 250.1116 59.0921 B 55.6
2005 08 21 233 090000 249.7994 59.2099 B 55.9
PRDX.OUT.s19
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2005 AUG 21 00:30 53.0394107448 -787830.245 327.4340 58.0932 252.609 58.764
2005 AUG 21 00:40 53.0946593500 -788598.307 329.9975 58.1182 252.553 59.874
2005 AUG 21 00:50 53.1499621393 -789376.096 332.5611 58.1430 252.496 60.932
2005 AUG 21 01:00 53.2053197592 -790162.674 335.1248 58.1677 252.439 61.931
2005 AUG 21 01:10 53.2607327927 -790957.085 337.6884 58.1923 252.382 62.865
2005 AUG 21 01:20 53.3162017546 -791758.357 340.2520 58.2167 252.326 63.725
2005 AUG 21 01:30 53.3717270937 -792565.502 342.8157 58.2411 252.269 64.504
2005 AUG 21 01:40 53.4273091844 -793377.522 345.3794 58.2652 252.212 65.192
2005 AUG 21 01:50 53.4829483354 -794193.408 347.9430 58.2893 252.155 65.781
2005 AUG 21 02:00 53.5386447775 -795012.140 350.5067 58.3132 252.098 66.264
2005 AUG 21 02:10 53.5943986789 -795832.697 353.0703 58.3370 252.042 66.633
2005 AUG 21 02:20 53.6502101315 -796654.049 355.6339 58.3606 251.985 66.884
2005 AUG 21 02:30 53.7060791505 -797475.168 358.1974 58.3841 251.928 67.011
2005 AUG 21 02:40 53.7620056878 -798295.022 0.7610 58.4075 251.871 67.013
2005 AUG 21 02:50 53.8179896165 -799112.583 3.3244 58.4308 251.815 66.890
2005 AUG 21 03:00 53.8740307422 -799926.829 5.8879 58.4539 251.758 66.645
2005 AUG 21 03:10 53.9301287923 -800736.740 8.4513 58.4768 251.702 66.281
2005 AUG 21 03:20 53.9862834321 -801541.307 11.0146 58.4997 251.645 65.805
2005 AUG 21 03:30 54.0424942519 -802339.531 13.5778 58.5224 251.589 65.224
2005 AUG 21 03:40 54.0987607677 -803130.424 16.1410 58.5450 251.532 64.546
2005 AUG 21 03:50 54.1550824362 -803913.013 18.7041 58.5674 251.476 63.779
2005 AUG 21 04:00 54.2114586393 -804686.341 21.2671 58.5898 251.420 62.932
2005 AUG 21 04:10 54.2678886971 -805449.468 23.8300 58.6120 251.364 62.012
2005 AUG 21 04:20 54.3243718598 -806201.475 26.3928 58.6340 251.308 61.030
2005 AUG 21 04:30 54.3809073165 -806941.463 28.9555 58.6560 251.252 59.991
2005 AUG 21 04:40 54.4374941962 -807668.558 31.5181 58.6778 251.196 58.902
2005 AUG 21 04:50 54.4941315629 -808381.910 34.0805 58.6995 251.141 57.771
2005 AUG 21 05:00 54.5508184242 -809080.696 36.6429 58.7211 251.085 56.602
2005 AUG 21 05:10 54.6075537335 -809764.122 39.2051 58.7426 251.030 55.401
2005 AUG 21 05:20 54.6643363847 -810431.422 41.7672 58.7640 250.975 54.173
2005 AUG 21 05:30 54.7211652240 -811081.863 44.3292 58.7852 250.920 52.923
2005 AUG 21 05:40 54.7780390424 -811714.744 46.8910 58.8063 250.865 51.653
2005 AUG 21 05:50 54.8349565880 -812329.398 49.4527 58.8274 250.810 50.367
2005 AUG 21 06:00 54.8919165583 -812925.194 52.0142 58.8483 250.755 49.070
2005 AUG 21 06:10 54.9489176104 -813501.537 54.5756 58.8691 250.700 47.762
2005 AUG 21 06:20 55.0059583635 -814057.869 57.1368 58.8898 250.646 46.448
2005 AUG 21 06:30 55.0630373964 -814593.674 59.6978 58.9105 250.592 45.129
2005 AUG 21 06:40 55.1201532509 -815108.471 62.2587 58.9310 250.538 43.808
2005 AUG 21 06:50 55.1773044389 -815601.824 64.8195 58.9514 250.484 42.487
2005 AUG 21 07:00 55.2344894453 -816073.334 67.3800 58.9718 250.430 41.167
2005 AUG 21 07:10 55.2917067265 -816522.649 69.9404 58.9920 250.377 39.852
2005 AUG 21 07:20 55.3489547155 -816949.456 72.5006 59.0122 250.323 38.541
2005 AUG 21 07:30 55.4062318227 -817353.487 75.0607 59.0323 250.270 37.237
2005 AUG 21 07:40 55.4635364457 -817734.518 77.6205 59.0523 250.217 35.942
2005 AUG 21 07:50 55.5208669633 -818092.369 80.1802 59.0722 250.164 34.657
2005 AUG 21 08:00 55.5782217483 -818426.904 82.7397 59.0921 250.112 33.383
2005 AUG 21 08:10 55.6355991626 -818738.032 85.2991 59.1119 250.059 32.122
2005 AUG 21 08:20 55.6929975614 -819025.708 87.8582 59.1316 250.007 30.875
2005 AUG 21 08:30 55.7504153053 -819289.929 90.4172 59.1513 249.955 29.643
GOLDSTONE MASTERLOG
==============================================================================
RCV
file setup runs start -stop osod OFFSET TX Poln
------------------------------------------------------------------------------
August 21 (DOY 233)
==============================================================================
RADAR ASTROMETRY
==============================================================================
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/2005OE3/html/2005OE3_planning.html
Asteroid Radar Astronomy