2009 DR3 Goldstone Radar Observations Planning
2009 DR3 was discovered by the Catalina Sky Survey on February 20, 2009. It has an absolute magnitude of 21.4, that suggests a diameter within a factor of two of 150 meters. We do not know its period or the spectral class yet. This object will brighten to about 15.6th magnitude in mid-March. We have a very short Goldstone track (75 min) scheduled on March 15. This date coincides with the closest approach of 2009 DR3 to Earth (0.018 AU or 7 lunar distances). We hope to obtain CW, ranging and 0.25 usec imaging data. 2009 DR3 has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.
Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.971 AU eccentricity 0.559 inclination 4.1° perihelion distance 0.869 AU aphelion distance 4.110 AU absolute magnitude (H) 21.4 diameter 150 meters +- a factor of two rotation period unknown pole direction unknown lightcurve amplitude unknown spectral class unknown Last update: 2009 March 14
M.P.E.C. 2009-D40 Issued 2009 Feb. 20, 20:47 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.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://www.cfa.harvard.edu/iau/mpc.html ISSN 1523-6714
2009 DR3
Observations:
K09D03R* C2009 02 20.33243 09 58 02.78 +19 56 24.0 18.5 V ED040703
K09D03R C2009 02 20.33873 09 58 02.17 +19 56 23.1 18.4 V ED040703
K09D03R C2009 02 20.34520 09 58 01.48 +19 56 22.6 18.3 V ED040703
K09D03R C2009 02 20.35161 09 58 00.87 +19 56 22.3 18.1 V ED040703
K09D03R C2009 02 20.36196 09 57 59.76 +19 56 21.5 18.6 V ED040703
K09D03R C2009 02 20.36937 09 57 58.89 +19 56 18.6 17.8 R ED040H01
K09D03R C2009 02 20.37116 09 57 58.86 +19 56 20.4 18.2 V ED040703
K09D03R C2009 02 20.37340 09 57 58.48 +19 56 18.1 17.9 R ED040H01
K09D03R C2009 02 20.37722 09 57 58.10 +19 56 17.6 18.1 R ED040H01
K09D03R C2009 02 20.38046 09 57 57.85 +19 56 19.1 18.1 V ED040703
K09D03R C2009 02 20.38072 09 57 57.74 +19 56 17.1 17.8 R ED040H01
K09D03R C2009 02 20.39830 09 57 56.10 +19 56 16.8 19.0 R ED040854
K09D03R C2009 02 20.39961 09 57 55.93 +19 56 16.9 18.9 R ED040854
K09D03R C2009 02 20.40223 09 57 55.73 +19 56 16.9 19.0 R ED040854
K09D03R C2009 02 20.41505209 57 53.84 +19 56 03.9 18.0 V ED040H55
K09D03R C2009 02 20.42045409 57 53.35 +19 56 03.0 18.0 V ED040H55
K09D03R C2009 02 20.42507009 57 52.92 +19 56 02.2 18.1 V ED040H55
K09D03R %C2009 02 20.49243 09 57 46.84 +19 55 59.7 18.3 R ED040H06
K09D03R %C2009 02 20.50264 09 57 45.88 +19 55 58.9 17.6 R ED040H06
K09D03R C2009 02 20.82413 09 57 23.46 +19 55 27.8 17.7 C ED040A81
K09D03R C2009 02 20.82885 09 57 22.98 +19 55 28.8 18.7 C ED040A81
K09D03R C2009 02 20.83320 09 57 22.47 +19 55 28.4 18.9 C ED040A81
Observer details:
703 Catalina Sky Survey. Observer R. E. Hill. Measurers E. C. Beshore,
A. Boattini, G. J. Garradd, A. R. Gibbs, A. D. Grauer, R. E. Hill,
R. A. Kowalski, S. M. Larson, R. H. McNaught. 0.68-m Schmidt + CCD.
854 Sabino Canyon Observatory, Tucson. Observer J. E. McGaha. 0.36-m f/10.0
Schmidt-Cassegrain + CCD.
A81 Balzaretto Observatory, Rome. Observer L. Franco. 0.20-m f/5.3 reflector
+ CCD.
H01 Magdalena Ridge Observatory, Socorro. Observer W. H. Ryan. 2.4-m f/8.9
reflector + CCD.
H06 RAS Observatory, Mayhill. Observers E. Guido, G. Sostero, P. Camilleri.
0.25-m f/3.4 reflector + CCD.
H55 Astronomical Research Observatory, Charleston. Observer R. Holmes.
Measurer S. Foglia.
Orbital elements:
2009 DR3 PHA, Earth MOID = 0.0109 AU
Epoch 2008 Nov. 30.0 TT = JDT 2454800.5 MPC
M 302.42217 (2000.0) P Q
n 0.40600479 Peri. 235.68612 -0.74700494 +0.66461468
a 1.8062670 Node 345.94252 -0.58552829 -0.66943731
e 0.5057284 Incl. 3.88579 -0.31486544 -0.33187499
P 2.43 H 21.5 G 0.15 U 9
Residuals in seconds of arc
090220 703 0.8- 0.2- 090220 H01 0.3+ 0.1+ 090220 H55 0.0 0.3-
090220 703 0.2- 0.5- 090220 703 0.6- 0.2+ 090220 H06 0.1+ 0.5-
090220 703 0.5- 0.3- 090220 H01 0.2+ 0.1+ 090220 H06 0.4- 0.5+
090220 703 0.2+ 0.1+ 090220 854 0.3+ 0.1+ 090220 A81 0.4+ 0.7-
090220 703 0.4- 0.4+ 090220 854 0.3- 0.4+ 090220 A81 0.2+ 0.5+
090220 H01 0.2+ 0.1+ 090220 854 0.6+ 0.7+ 090220 A81 0.9- 0.2+
090220 703 0.2+ 0.4+ 090220 H55 0.2- 0.2-
090220 H01 0.2+ 0.1+ 090220 H55 0.0 0.2-
Ephemeris:
2009 DR3 a,e,i = 1.81, 0.51, 4 q = 0.8928
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2009 02 18 10 01.05 +19 58.4 0.184 1.171 171.7 7.0 18.7
2009 02 20 09 58.52 +19 57.0 0.170 1.156 170.3 8.2 18.5
2009 02 22 09 55.57 +19 53.6 0.156 1.142 168.6 9.9 18.4
2009 02 24 09 52.12 +19 47.7 0.142 1.128 166.4 11.9 18.2
2009 02 26 09 48.08 +19 38.4 0.129 1.114 164.1 14.1 18.1
2009 02 28 09 43.28 +19 24.5 0.116 1.101 161.4 16.7 17.9
2009 03 02 09 37.52 +19 04.3 0.103 1.087 158.5 19.5 17.7
2009 03 04 09 30.43 +18 35.4 0.0904 1.074 155.3 22.7 17.5
2009 03 06 09 21.48 +17 53.7 0.0781 1.061 151.7 26.3 17.3
2009 03 08 09 09.71 +16 52.1 0.0661 1.049 147.4 30.7 17.0
2009 03 10 08 53.47 +15 17.7 0.0544 1.037 142.0 36.1 16.7
2009 03 12 08 29.55 +12 43.5 0.0433 1.025 134.8 43.5 16.4
2009 03 14 07 51.43 +08 11.1 0.0330 1.013 123.9 54.5 16.1
2009 03 16 06 46.06 -00 19.7 0.0247 1.002 105.7 72.9 16.0
2009 03 18 04 57.97 -13 51.0 0.0208 0.991 77.0 101.8 16.8
2009 03 20 02 52.24 -24 28.8 0.0236 0.980 48.7 130.3 19.1
Timothy B. Spahr (C) Copyright 2009 MPC M.P.E.C. 2009-D40
Target Name: 2009 DR3
HMag: 21.4
Diameter: 0.16 km (an educated guess for its absolute magnitude and assuming a S-class optical albedo)
Period: 2.2 h (assuming fast rotation lowers the SNR estimates)
LST # max
start date window window RA, dec dist runs SNR SNR/run
-----------------------------------------------------------------------------
2009 Mar 10 00:08-09:54 03:32-13:19 127, 13 0.038 379 83 5
2009 Mar 10 23:49-09:20 03:17-12:49 121, 11 0.032 423 160 8
2009 Mar 11 23:26-08:33 02:57-12:06 113, 7 0.027 469 310 15
2009 Mar 12 22:56-07:28 02:31-11:05 103, 2 0.023 507 590 29
2009 Mar 13 22:17-06:00 01:56-09:40 88, -5 0.020 512 970 47
2009 Mar 14 21:32-04:12 01:15-07:56 70, -13 0.019 463 1100 55
2009 Mar 15 20:43-02:23 00:30-06:11 51, -20 0.020 375 720 40
2009 Mar 16 19:55-00:54 23:46-04:45 34, -24 0.023 294 360 22
2009 Mar 17 19:12-23:52 23:06-03:47 22, -26 0.027 238 170 12
Goldstone SNRs assume Ptx = 430 kW
Goldstone Schedule
UT UT PST Duration Round-trip
DOY Date TX Window TX Window hh:mm time (sec) SNR/Run
--- ---- --------- --------- --------- ------- -------
074 Mar 15 0015-0130 1715-1830 Mar 14 1:15 19 55
From Horizons, 2009 March 8: JPL solution 13, #obs = 137 (20 days) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2009-Mar-10 00:00 * 127.41731 13.24802 .039315327591389 8.36054066 499.39 1786.17 0.119583 2009-Mar-11 00:00 * 122.02649 10.98085 .033279028407430 14.2642422 469.19 1678.14 0.101940 2009-Mar-12 00:00 * 114.53495 7.60312 .027719015473916 24.9030532 419.09 1498.96 0.085637 2009-Mar-13 00:00 * 103.86524 2.48382 .022975487598851 43.5013696 332.26 1188.39 0.071541 2009-Mar-14 00:00 * 88.81729 -4.89361 .019644366493144 70.7697863 186.17 665.89 0.061146 2009-Mar-15 00:00 * 69.46955 -13.58316 .018504687473007 94.0325036 17.48 62.50 0.056576 2009-Mar-16 00:00 * 49.12554 -20.59391 .019939702116405 94.7083158 215.98 772.49 0.059341 2009-Mar-17 00:00 * 32.11444 -24.33242 .023488357336145 79.2117597 353.66 1264.95 0.068592 2009-Mar-18 00:00 * 19.75571 -25.77296 .028376057570985 62.5300397 434.50 1554.06 0.082131 2009-Mar-19 00:00 * 11.12138 -26.13418 .034039300820511 49.7124653 481.22 1721.16 0.098201 - - - - - - - - - - - - - - - - - - - - From Horizons, 2009 March 12: JPL/Horizons solution 18, #obs = 179, (25 days) 2009-Mar-10 00:00 * 127.28100 13.27987 .039322722524620 0.753324037 224.30 802.24 0.052251 2009-Mar-11 00:00 * 121.89145 11.00844 .033285011134078 0.788923411 210.79 753.94 0.044340 2009-Mar-12 00:00 * 114.40219 7.62440 .027723757003419 1.19680340 188.37 673.74 0.037062 2009-Mar-13 00:00 * 103.73650 2.49557 .022979302486278 2.77025885 149.47 534.60 0.030855 2009-Mar-14 00:00 * 88.69499 -4.89568 .019647813844387 6.01728308 83.97 300.32 0.026468 2009-Mar-15 00:00 * 69.35482 -13.60201 .018508559791018 9.94904122 7.39 26.43 0.024881 2009-Mar-16 00:00 * 49.01530 -20.62747 .019944692343578 11.8218424 96.53 345.27 0.026605 2009-Mar-17 00:00 * 32.00407 -24.37512 .023494801220138 11.2488536 158.40 566.53 0.031106 2009-Mar-18 00:00 * 19.64313 -25.82020 .028384069568982 9.84660264 194.74 696.53 0.037406 2009-Mar-19 00:00 * 11.00643 -26.18343 .034048926621680 8.51741920 215.76 771.72 0.044763 --------------------------------------- From Horizons, 2009 March 14: JPL/Horizons solution 20, #obs 211, (27 days) 2009-Mar-10 00:00 * 127.41667 13.24791 .039322405079441 0.503490073 173.01 618.82 0.039901 2009-Mar-11 00:00 * 122.02542 10.98060 .033284743097875 0.562403926 162.64 581.70 0.033795 2009-Mar-12 00:00 * 114.53316 7.60257 .027723532227019 0.643190549 145.40 520.04 0.028181 2009-Mar-13 00:00 * 103.86226 2.48275 .022979110597078 0.860864138 115.46 412.97 0.023402 2009-Mar-14 00:00 * 88.81260 -4.89537 .019647638084947 1.57534552 65.02 232.57 0.020059 2009-Mar-15 00:00 * 69.46329 -13.58513 .018508378105314 2.77276059 5.35 19.15 0.018923 2009-Mar-16 00:00 * 49.11906 -20.59517 .019944484807563 3.61289230 74.10 265.02 0.020370 2009-Mar-17 00:00 * 32.10899 -24.33281 .023494554967486 3.72873301 121.82 435.72 0.023943 2009-Mar-18 00:00 * 19.75152 -25.77285 .028383776925111 3.49150921 149.88 536.08 0.028872 2009-Mar-19 00:00 * 11.11819 -26.13385 .034048582780742 3.19296131 166.12 594.16 0.034593
Possible CW setup:
---------------------------------------------------------------------------
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: 2
Dwell 10 seconds
Bandwidth: 4000 Hz
Sampling interval: 2500 x 0.1 usec
VME FFT for PSD files: 4096 for 0.98-Hz resolution
Possible ranging setups:
---------------------------------------------------------------------------
255 x 64 10-usec single sample
baud 10 usec
code 255
gates 255
PRP 2550 usec
FFT 64
CLT VME ?
PFS ?
ncoh 1
bandwidth 392.2 Hz
resolution 6.1 Hz
TXOFF +50 Hz -> echo will be centered at +8 bins or in bin 32 + 8 = 40
---------------------------------------------------------------------------
255 x 64 11-usec single sample
baud 11 usec
code 255
gates 255
PRP 2805 usec
FFT 64
CLT VME ?
PFS ?
ncoh 1
bandwidth 356.5 Hz
resolution 5.6 Hz
TXOFF +50 Hz --> echo will be centered at +9 bins or in bin 32 + 9 = 41
-------------------------------------------------------------------------
127 x 64 7-usec single sample
baud 7 usec
code 127
gates 127
PRP 889
FFT 64
CLT VME ?
PFS ?
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
-------------------------------------------------------------------------------
0.25-usec ranging
setup JX1XS002 revised
baud 0.25 usec
code 255
FFT 128
ncoh 124
bandwidth 126.5 Hz
resolution 0.99 Hz
TXOFF +20 Hz, echo is in bin 64+20=84
_____________________________________________________________________
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
____________________________________________________________________
OSOD and predicts are on aardvark:
/export/data3/osod/ops/2009dr3/PRDX.OUT.s20
/PUNCH.OUT.s20
/EPH.OUT.s20
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2009 03 15 074 000000 69.4633 -13.5853 A 18.5
2009 03 15 074 010000 68.5726 -13.9336 A 4.5 -1.8 18.5 20
2009 03 15 074 020000 67.6806 -14.2764 A 18.5
Transmit offsets are given in millidegrees.
PRDX.OUT.s20
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2009 MAR 14 23:50 18.4695041645 -7839.521 343.7257 -13.5267 69.611 38.678
2009 MAR 15 00:00 18.4701526360 -10665.460 346.3807 -13.5853 69.463 39.319
2009 MAR 15 00:10 18.4709995655 -13501.740 349.0358 -13.6437 69.315 39.843
2009 MAR 15 00:20 18.4720455943 -16346.140 351.6910 -13.7019 69.167 40.245
2009 MAR 15 00:30 18.4732912195 -19196.421 354.3463 -13.7601 69.018 40.523
2009 MAR 15 00:40 18.4747367682 -22050.334 357.0016 -13.8181 68.870 40.674
2009 MAR 15 00:50 18.4763824158 -24905.618 359.6570 -13.8759 68.721 40.697
2009 MAR 15 01:00 18.4782281853 -27760.013 2.3125 -13.9336 68.573 40.592
2009 MAR 15 01:10 18.4802739351 -30611.258 4.9680 -13.9911 68.424 40.359
2009 MAR 15 01:20 18.4825193595 -33457.100 7.6235 -14.0485 68.275 40.001
2009 MAR 15 01:30 18.4849640010 -36295.298 10.2790 -14.1057 68.127 39.520
2009 MAR 15 01:40 18.4876072520 -39123.626 12.9345 -14.1628 67.978 38.919
2009 MAR 15 01:50 18.4904483431 -41939.881 15.5900 -14.2197 67.829 38.203
2009 MAR 15 02:00 18.4934863459 -44741.885 18.2455 -14.2764 67.681 37.377
2009 DR3 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 300-233 | FAX: (818) 354-9476
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/2009DR3/2009DR3_planning.html
Asteroid Radar Astronomy