2009 WV25 Goldstone Radar Observations Planning
2009 WV25 was discovered on Nov 22, 2009 by Catalina Sky Survey. 2009 WV25 is a small object (~0.05 km plus/minus a factor of two), but it approaches close enough to Earth (within 2.9 LD on Dec 01) to be an excellent radar target. Preliminary lightcurve measurements hint at an anomalous object, with significant elongation (1 m lightcurve amplitude) and unusually long (for its size) rotational period (several hours with a possiblity of non-principal axis rotation). 2009 WV25 is optically observable until Dec 02 after which it goes too close to the Sun. We will observe this object in one 90 minute track at Goldstone on Dec 02.
Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.401 AU eccentricity 0.43 inclination 0.4° perihelion distance 0.803 AU aphelion distance 1.999 AU absolute magnitude (H) 24.0 diameter 0.05 km (plus/minus a factor of two) rotation period 3 - 5 hours, possibly in a non-principal axis spin state (Bill Ryan, private comm.) pole direction unknown lightcurve amplitude 1 mag (Bill Ryan, private comm.) spectral class unknown Last update: 2009 Dec 02
M.P.E.C. 2009-W71 Issued 2009 Nov. 23, 02:08 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 WV25
Observations:
K09W25V C2009 11 22.25176 03 26 30.92 +25 48 35.2 19.3 EW071704
K09W25V* C2009 11 22.27012 03 26 28.35 +25 49 21.9 18.1 V EW071703
K09W25V C2009 11 22.27657 03 26 26.60 +25 49 32.7 18.7 EW071704
K09W25V C2009 11 22.27730 03 26 27.09 +25 49 39.0 17.9 V EW071703
K09W25V C2009 11 22.28448 03 26 25.94 +25 49 56.0 17.4 V EW071703
K09W25V C2009 11 22.28900 03 26 24.40 +25 50 01.7 18.4 EW071704
K09W25V C2009 11 22.30143 03 26 22.16 +25 50 31.2 18.9 EW071704
K09W25V C2009 11 22.31585 03 26 20.22 +25 51 09.9 18.9 V EW071G96
K09W25V C2009 11 22.32154 03 26 19.21 +25 51 23.1 19.0 V EW071G96
K09W25V C2009 11 22.32749 03 26 18.13 +25 51 36.8 18.8 V EW071G96
K09W25V C2009 11 22.33341 03 26 17.08 +25 51 50.5 18.6 V EW071G96
K09W25V C2009 11 22.36286 03 26 11.94 +25 52 57.8 17.9 V EW071G96
K09W25V C2009 11 22.36332 03 26 11.86 +25 52 58.9 17.9 V EW071G96
K09W25V C2009 11 22.36375 03 26 11.76 +25 52 59.8 17.9 V EW071G96
K09W25V C2009 11 22.36420 03 26 11.68 +25 53 01.0 17.9 V EW071G96
K09W25V C2009 11 22.41889 03 26 01.33 +25 54 11.5 18.2 R EW071932
K09W25V C2009 11 22.42510 03 26 00.52 +25 54 25.1 18.4 R EW071932
K09W25V C2009 11 22.46956 03 25 54.54 +25 56 53.8 17.9 R EW071651
K09W25V C2009 11 22.47065 03 25 54.37 +25 56 56.3 18.0 R EW071651
K09W25V C2009 11 22.47174 03 25 54.21 +25 56 58.6 18.0 R EW071651
K09W25V C2009 11 22.85727 03 25 19.58 +26 13 43.0 18.6 C EW071J28
K09W25V C2009 11 22.86268 03 25 18.62 +26 13 58.9 18.4 C EW071J28
K09W25V C2009 11 22.86809 03 25 17.68 +26 14 14.8 18.4 C EW071J28
K09W25V C2009 11 22.86915 03 25 16.41 +26 14 11.7 17.9 R EW071B49
K09W25V C2009 11 22.87155 03 25 16.02 +26 14 18.9 17.9 R EW071B49
K09W25V C2009 11 22.88479 03 25 13.60 +26 14 57.1 17.5 R EW071B49
Observer details:
651 Grasslands Observatory, Tucson. Observer J. E. McGaha. 0.62-m f/5.1
Newtonian reflector + CCD.
703 Catalina Sky Survey. Observer A. Boattini. 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.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Bezpalko, D. Torres,
R. Kracke, G. Spitz, M. Blythe. Measurer J. Stuart. 1.0-m f/2.15
reflector + CCD.
932 John J. McCarthy Obs., New Milford. Observers S. Riley, D. Vill.
Measurer D. Vill. 0.4-m f/6.5 Schmidt-Cassegrain + CCD.
B49 Paus Observatory, Sabadell. Observer J. Camarasa. 0.25-m f/4 Newtonian
reflector + CCD.
G96 Mt. Lemmon Survey. Observers A. R. Gibbs, S. F. Tornero. 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. 1.5-m reflector
+ CCD.
J28 Jaen. Observer J. J. Martin. 0.20-m f/10 Schmidt-Cassegrain + CCD
+ f/6.3 focal reducer.
Orbital elements:
2009 WV25 Earth MOID = 0.0051 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC
M 351.36475 (2000.0) P Q
n 0.59711319 Peri. 153.86100 -0.73002769 -0.68341430
a 1.3966844 Node 343.02744 +0.62574931 -0.66718133
e 0.4246690 Incl. 0.41433 +0.27476785 -0.29633421
P 1.65 H 23.9 G 0.15 U 9
Residuals in seconds of arc
091122 704 0.6- 1.3+ 091122 G96 0.3- 0.1- 091122 651 0.1+ 0.1+
091122 703 0.4- 0.4+ 091122 G96 0.3- 0.1- 091122 651 0.1+ 0.1+
091122 704 0.3+ 0.6- 091122 G96 0.1+ 0.0 091122 J28 0.3- 0.0
091122 703 0.2- 0.3+ 091122 G96 0.1+ 0.1+ 091122 J28 0.3- 0.1-
091122 703 1.6+ 0.1+ 091122 G96 0.2- 0.0 091122 J28 0.1+ 0.1-
091122 704 0.4+ 1.0- 091122 G96 0.2- 0.2+ 091122 B49 0.3- 0.1-
091122 704 0.1- 0.7- 091122 932 0.1- 0.1- 091122 B49 0.3+ 0.1+
091122 G96 0.1- 0.0 091122 932 0.5- 0.2+ 091122 B49 0.4+ 0.1+
091122 G96 0.0 0.0 091122 651 0.3+ 0.0
Ephemeris:
2009 WV25 a,e,i = 1.40, 0.42, 0 q = 0.8036
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
.
.
2009 11 23 03 24.89 +26 21.0 0.0546 1.041 171.0 8.6 18.3
2009 11 24 03 22.25 +27 13.3 0.0483 1.035 169.4 10.1 18.0
2009 11 25 03 18.80 +28 20.6 0.0421 1.028 167.5 12.0 17.8
2009 11 26 03 14.11 +29 50.2 0.0359 1.022 165.1 14.4 17.5
2009 11 27 03 07.29 +31 55.3 0.0298 1.015 162.1 17.4 17.2
2009 11 28 02 56.49 +35 00.9 0.0238 1.009 157.9 21.6 16.8
2009 11 29 02 36.71 +39 59.9 0.0179 1.002 151.3 28.2 16.4
2009 11 30 01 50.08 +48 44.3 0.0125 0.996 139.2 40.3 16.0
2009 12 01 23 02.08 +60 28.6 0.00841 0.989 113.0 66.6 15.8
2009 12 02 18 26.43 +41 13.1 0.00788 0.983 68.4 111.1 17.6
2009 12 03 17 04.53 +15 27.5 0.0115 0.977 38.1 141.5 21.2
2009 12 04 16 35.97 +03 08.3 0.0167 0.971 25.4 154.2 24.3
2009 12 05 16 21.94 -03 08.7 0.0225 0.964 20.0 159.5 26.4
Timothy B. Spahr (C) Copyright 2009 MPC M.P.E.C. 2009-W71
Target Name: 2009 WV25
HMag: 23.9
Diameter: 0.05 km (plus/minus a factor of two)
Period: 2.5 h
Dist. # SNR/ SNR/
Start date UT window RA, Dec AU runs date run
---------------------------------------------------------------------
2009 Nov 29-30 22:30-11:12 23, 51 0.011 700 1350 55
2009 Nov 30-Dec 01 19:35-07:42 339, 61 0.008 700 4410 180
2009 Dec 01-02 15:46-03:10 280, 44 0.008 700 5420 220
2009 Dec 02-03 15:03-01:03 258, 18 0.011 700 1730 70
2009 Dec 03-04 15:02-00:01 250, 4 0.016 666 430 18
2009 Dec 04-05 15:04-23:25 246, -2 0.021 500 130 6
Goldstone SNRs assume Ptx = 430 kW
Goldstone track:
UT UT PST Duration Round-trip
DOY Date TX Window TX Window hh:mm time (sec) SNR/Run
--- ---- --------- --------- --------- ------- -------
336 Dec 02 2200 2330 1400-1530 Dec 02 1:30 11 70
From Jon Giorgini, 2009 Dec 02: JPL Solution 18, #obs 188 (Nov 22-Dec-2) Formal 3-sigma X-band uncertainties during the experiment window: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2009-Dec-02 21:00 5.476 732.89 0.017645 2009-Dec-02 21:30 5.549 738.27 0.017798 2009-Dec-02 22:00 5.623 743.51 0.017953 2009-Dec-02 22:30 5.696 748.61 0.018109 2009-Dec-02 23:00 5.767 753.57 0.018266 2009-Dec-02 23:30 5.834 758.39 0.018424 2009-Dec-03 00:00 5.894 763.08 0.018583 From Jon Giorgini, 2009 Dec 01: JPL Solution 16, #obs 171 (Nov 22-Dec-1) Formal 3-sigma X-band uncertainties during the experiment window: Date__(UT) HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2009-Dec-02 21:00 6.125 768.72 0.018504 2009-Dec-02 21:30 6.199 774.36 0.018665 2009-Dec-02 22:00 6.274 779.85 0.018827 2009-Dec-02 22:30 6.348 785.20 0.018990 2009-Dec-02 23:00 6.419 790.40 0.019155 2009-Dec-02 23:30 6.486 795.46 0.019320 2009-Dec-03 00:00 6.545 800.38 0.019487 From Jon Giorgini, 2009 Nov 30: JPL Solution 13, #obs 136 (Nov 22-29) Formal 3-sigma X-band uncertainties during the experiment window: Date__(UT) HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2009-Dec-02 21:00 34.008 1062.62 0.025365 2009-Dec-02 21:30 33.774 1070.38 0.025583 2009-Dec-02 22:00 33.541 1077.94 0.025802 2009-Dec-02 22:30 33.309 1085.30 0.026023 2009-Dec-02 23:00 33.075 1092.46 0.026246 2009-Dec-02 23:30 32.839 1099.42 0.026470 2009-Dec-03 00:00 32.600 1106.18 0.026696 From Jon Giorgini, 2009 Nov 29: JPL Solution 10, #obs: 136 (Nov 22-28) Date__(UT)__HR:MN POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2009-Nov-30 00:00 6.558 314.72 1125.65 0.028997 2009-Dec-01 00:00 25.802 169.00 604.46 0.019577 2009-Dec-02 00:00 45.397 138.25 494.49 0.018387 2009-Dec-03 00:00 32.238 308.25 1102.51 0.026607 2009-Dec-04 00:00 22.589 359.33 1285.22 0.038638 2009-Dec-05 00:00 17.927 378.05 1352.18 0.051914 From Jon Giorgini, 2009 Nov 25: JPL Solution 6, # obs: 67 (Nov 22-25) Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2009-Nov-30 00:00 257.110 2756.88 0.064604 2009-Dec-01 00:00 780.666 1519.22 0.044048 2009-Dec-02 00:00 1118.215 1148.81 0.045099 2009-Dec-03 00:00 649.810 2646.18 0.076777 2009-Dec-04 00:00 374.661 3100.84 0.110005 2009-Dec-05 00:00 248.921 3269.20 0.143424 Apparent Magnitudes and Solar Elongations: Date__(UT)__HR:MN R.A._(J2000.0)_DEC. APmag delta S-O-T /r 2009-Nov-29 00:00 *m 39.22057 40.03790 16.53 0.01784066734014 151.3248 /T 2009-Nov-30 00:00 *m 27.37186 48.92406 16.07 0.01241281071286 139.0209 /T 2009-Dec-01 00:00 *m 343.79461 60.68467 15.96 0.00829494920869 112.1275 /T 2009-Dec-02 00:00 * 275.23656 40.16416 17.80 0.00790054654431 67.0225 /T 2009-Dec-03 00:00 * 255.56940 14.69066 n.a. 0.01161849511007 37.2795 /T 2009-Dec-04 00:00 * 248.66647 2.67424 n.a. 0.01693247945407 24.9317 /L 2009-Dec-05 00:00 * 245.26061 -3.45922 n.a. 0.02275873563837 19.7939 /L 2009-Dec-06 00:00 * 243.25228 -7.07001 n.a. 0.02879782328050 17.7780 /L 2009-Dec-07 00:00 * 241.93839 -9.42830 n.a. 0.03495017094070 17.2456 /L 2009-Dec-08 00:00 * 241.02040 -11.08564 n.a. 0.04117597953535 17.4485 /L
Our best estimate for the rotation period of this object is 3 - 5 hours. If we adopt
5 hours and assume that the diameter is about 50 meters, then the bandwidth
could be about 1 Hz.
The Doppler uncertainties are large so we're going to use a wider bandwidth
than usual (8000 Hz) at the beginning of the observations.
CW setup:
---------------------------------------------------------------------------
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: 2
Dwell 10 seconds
Bandwidth: 8000 Hz <-- NOTE THE BANDWIDTH!
Sampling interval: 1250 x 0.1 usec
VME FFT for PSD files: 16384 for 0.49-Hz resolution
Due to the short round-trip time we will get less than one complete hop
per run.
After we get CW echoes we will update the ephemeris, narrow the bandwidth
and do more CW observations to verify the new solution, and then test the
chirp system.
Ranging setups:
---------------------------------------------------------------------------
127 x 64 10-usec single sample
baud 10 usec
code 127
gates 127
PRP 1270 usec
FFT 64
CLT VME ?
PFS ?
ncoh 4
bandwidth 196.9 Hz
resolution 3.1 Hz
TXOFF +50 Hz -> echo will be centered at +16 bins or in bin 32 + 16 = 48
---------------------------------------------------------------------------
127 x 64 11-usec single sample
baud 11 usec
code 127
gates 127
PRP 1397 usec
FFT 64
CLT VME ?
PFS ?
ncoh 4
bandwidth 179.0 Hz
resolution 2.8 Hz
TXOFF +50 Hz --> echo will be centered at +18 bins or in bin 32 + 18 = 50
-------------------------------------------------------------------------
1-usec single sample
baud 1 usec
code 1023
ncoh 2
bandwidth 488.8 Hz
FFT 128
dfreq 3.8 Hz
TXoff +50 Hz (echo in bin 64+13 =77)
-------------------------------------------------------------------------------
0.125-usec
baud 0.125 usec
code 127
FFT 256
ncoh 120
bandwidth 65.6Hz
resolution 0.26 Hz
TXOFF +5Hz to put echo at 128 + 19 = bin 147
_____________________________________________________________________
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/2009wv25/PRDX.s18
/PUNCH.OUT.s18
/EPH.OUT.s18
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2009 12 02 336 2200 256.6032 16.1032 A 11.2
2009 12 02 336 2300 256.1058 15.3423 A 1.50 -2.40 11.4 s18
2009 12 03 336 0000 255.6377 14.6049 A 11.6
Transmit offsets are given in millidegrees.
PRDX.OUT.s18
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2009 DEC 02 22:00 11.2035135628 -475190.503 28.3833 16.1032 256.603 58.163
2009 DEC 02 22:10 11.2368887359 -477109.426 30.9750 15.9748 256.518 56.223
2009 DEC 02 22:20 11.2703973340 -478997.309 33.5660 15.8470 256.434 54.239
2009 DEC 02 22:30 11.3040371250 -480852.500 36.1561 15.7198 256.351 52.220
2009 DEC 02 22:40 11.3378057591 -482673.400 38.7455 15.5934 256.268 50.171
2009 DEC 02 22:50 11.3717007801 -484458.464 41.3340 15.4675 256.187 48.098
2009 DEC 02 23:00 11.4057196216 -486206.202 43.9218 15.3423 256.106 46.004
2009 DEC 02 23:10 11.4398596189 -487915.187 46.5087 15.2178 256.026 43.893
2009 DEC 02 23:20 11.4741180055 -489584.058 49.0948 15.0939 255.946 41.768
2009 DEC 02 23:30 11.5084919246 -491211.516 51.6800 14.9706 255.868 39.631
2009 WV25 GOLDSTONE MASTERLOG
==============================================================================
Receive TX
Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes
------------------------------------------------------------------------------
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
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/2009WV25/2009WV25_planning.html