2003 YL118 Goldstone Radar Observations Planning
2003 YL118 was discovered on Dec 28, 2003 by LINEAR - Lincoln Laboratory ETS in New Mexico. 2003 YL118 is a small object (~0.16 km plus/minus a factor of two), but it approaches close enough to Earth (within 13.2 LD) to be a good target for both Goldstone and Arecibo. We do not know any of its physical characteristics such as its rotational period, or its pole, or its spectral class. We expect to be able to get CW and ranging data from both Goldstone and Arecibo, while imaging will most likely be possible only at Arecibo. 2003 YL118 is too close to the Sun for the optical observations until the end of December when it emerges as an object with an apparent magnitude ~17. We appeal to optical observers to try to observe this object as soon as possible. The orbital uncertainies for this object are so large that it has the potential of being lost. Goldstone observations are scheduled on Dec. 20, and Dec. 24. This object will be observed at Arecibo on Dec. 20, and Dec. 21. 2003 YL118 has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.
Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.130 AU eccentricity 0.49 inclination 8° perihelion distance 0.581 AU aphelion distance 1.679 AU absolute magnitude (H) 21.5 diameter 0.16 km (plus/minus a factor of two) rotation period unknown pole direction unknown lightcurve amplitude unknown spectral class unknown Last update: 2009 Nov 05
M.P.E.C. 2003-YL118 Issued 2003 Dec. 29, 20:34 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 Steven and Michele Kirsch Foundation
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2003 YL118
Observations:
K03YB8L* C2003 12 28.14479 02 34 50.61 +28 11 56.3 17.1 EY093704
K03YB8L C2003 12 28.15848 02 35 12.03 +28 10 44.1 17.5 EY093704
K03YB8L C2003 12 28.17190 02 35 32.98 +28 09 32.8 17.5 EY093704
K03YB8L C2003 12 28.18531 02 35 53.84 +28 08 21.2 17.6 EY093704
K03YB8L C2003 12 28.19905 02 36 15.21 +28 07 07.6 17.5 EY093704
K03YB8L C2003 12 29.78050 03 11 15.41 +25 54 16.2 17.7 V EY093611
K03YB8L C2003 12 29.78160 03 11 16.69 +25 54 11.6 EY093611
K03YB8L C2003 12 29.78304 03 11 18.25 +25 54 04.0 EY093611
K03YB8L C2003 12 29.79464 03 11 30.40 +25 53 11.8 EY093611
K03YB8L C2003 12 29.79845 03 11 34.43 +25 52 54.3 EY093611
K03YB8L C2003 12 29.79978 03 11 35.78 +25 52 48.3 EY093611
K03YB8L C2003 12 29.80309 03 11 39.22 +25 52 32.4 EY093611
Observer details:
611 Starkenburg. Observers M. Busch, A. Heller, J. Rothermel. 0.45-m f/4.4
reflector + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko, R. Huber, L. Manguso, D. Torres, R. Kracke, M. McCleary,
H. Stange, A. Milner. Measurers J. Stuart, R. Sayer, J. Evans, J. Kommers.
1.0-m f/2.15 reflector + CCD.
Orbital elements:
2003 YL118
Epoch 2003 Dec. 27.0 TT = JDT 2453000.5 MPC
M 51.67826 (2000.0) P Q
n 0.83315521 Peri. 65.05653 +0.95374444 +0.27192380
a 1.1185415 Node 278.95489 -0.30061129 +0.85971456
e 0.4802411 Incl. 7.45556 -0.00209519 +0.43237522
P 1.18 H 21.4 G 0.15
From 12 observations 2003 Dec. 28-29.
Ephemeris:
2003 YL118 a,e,i = 1.12, 0.48, 7 q = 0.5814
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2003 12 27 01 58.84 +29 49.3 0.054 1.013 121.9 55.6 17.1
2004 01 06 04 21.12 +19 53.5 0.138 1.095 141.9 33.7 18.7
2004 01 16 04 53.83 +16 59.3 0.237 1.172 138.7 33.6 20.0
2004 01 26 05 12.20 +16 00.6 0.343 1.243 132.7 35.6 21.0
2004 02 05 05 27.49 +15 43.1 0.456 1.309 126.3 37.4 21.8
Timothy B. Spahr (C) Copyright 2003 MPC M.P.E.C. 2003-Y93
Target Name: 2003 YL118
HMag: 21.5
Diameter: 0.16 km (plus/minus a factor of two)
Period: 2.2 h (a conservative lower bound)
# max
Start date UT window RA, dec dist runs SNR SNR/run
----------------------------------------------------------------
2009 Dec 18 04:02-21:41 294, 15 0.051 305 23 1
2009 Dec 19 04:37-22:09 301, 20 0.044 358 40 2
2009 Dec 20 05:28-22:50 311, 26 0.038 419 69 4
2009 Dec 21 06:42-23:51 326, 32 0.035 478 102 5
2009 Dec 22 08:20-01:08 345, 38 0.034 510 118 6
2009 Dec 23 09:57-02:25 5, 39 0.036 497 97 5
2009 Dec 24 11:06-03:25 23, 38 0.040 448 62 3
2009 Dec 25 11:45-04:05 36, 35 0.046 390 35 2
2009 Dec 26 12:07-04:32 45, 32 0.053 337 20 1
Goldstone SNRs assume Ptx = 430 kW
Goldstone Schedule
-------------------
UT UT PDT AST Duration Round-trip
DOY Date TX Window TX Window TX Window hh:mm time (sec) SNR/Run
--- ---- --------- --------- --------- --------- ------- -------
354 Dec 20 2105 0000 1305-1600 Dec 20 1705-2000 Dec 20 2:55 37 4
358 Dec 24 0540 0800 2140-0000 Dec 23 0140-0400 Dec 24 2:20 38 3
Arecibo Schedule
------------------
354 Dec 20 1800 2043 1000 1243 Dec 20 1400 1643 Dec 20 2:43 38 80
355 Dec 21 1918 2120 1118 1320 Dec 21 1518 1720 Dec 21 2:02 34 110
Arecibo SNRs assume Ptx = 700 kW
From Horizons, 2004 Jan 24: JPL Solution 9, #obs: 72 (2003-2004) ************************************************************************************************************** Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig ************************************************************************************************************** 2009-Dec-19 00:00 *m 296.12533 16.32036 0.04791348409022 124079.089 13800.93 49361.67 35.454440 2009-Dec-20 00:00 *m 304.21053 21.70764 0.04167290968614 135235.607 10990.65 39310.17 36.158514 2009-Dec-21 00:00 *m 315.64732 28.05338 0.03689130089878 150317.206 7108.73 25425.73 36.033375 2009-Dec-22 00:00 *m 331.41443 34.33248 0.03417647852837 173504.032 2155.76 7710.48 34.107014 2009-Dec-23 00:00 *m 350.82086 38.52929 0.03402224783651 198225.544 3171.50 11343.47 29.842886 2009-Dec-24 00:00 *m 10.24700 39.32253 0.03646164236002 207916.116 7751.85 27725.99 24.074844 2009-Dec-25 00:00 *m 26.05586 37.55576 0.04103914941754 198848.931 10984.77 39289.14 18.339463 2009-Dec-26 00:00 *m 37.53489 34.82803 0.04714310832023 179823.307 12996.87 46485.79 13.561773 ************************************************************************************************************** Apparent Magnitudes and Solar Elongations: Date__(UT)__HR:MN R.A._(J2000.0)_DEC. APmag delta S-O-T /r 2009-Dec-15 00:00 280.05246 3.92968 n.a. 0.07998864970304 32.1909 /T 2009-Dec-16 00:00 282.63042 6.04579 n.a. 0.07134512067379 34.8026 /T 2009-Dec-17 00:00 285.91674 8.68810 n.a. 0.06302734064753 38.2248 /T 2009-Dec-18 00:00 290.22291 12.03781 n.a. 0.05516084338792 42.7804 /T 2009-Dec-19 00:00 296.03874 16.31355 n.a. 0.04794784999429 48.9274 /T 2009-Dec-20 00:00 304.12669 21.69048 n.a. 0.04171065018932 57.2485 /T 2009-Dec-21 00:00 315.55973 28.02036 18.44 0.03693219730612 68.2639 /T 2009-Dec-22 00:00 331.30810 34.28085 17.58 0.03421904020348 81.8673 /T 2009-Dec-23 00:00 350.67761 38.46662 16.99 0.03406370723746 96.6431 /T 2009-Dec-24 00:00 10.06647 39.26369 16.70 0.03649939647586 110.3016 /T 2009-Dec-25 00:00 25.85598 37.50857 16.64 0.04107211078778 121.2799 /T 2009-Dec-26 00:00 37.33079 34.79173 16.73 0.04717151001644 129.3698 /T 2009-Dec-27 00:00 45.45584 32.06779 16.89 0.05429437798329 135.0868 /T 2009-Dec-28 00:00 51.30571 29.67170 17.09 0.06209957412289 139.0550 /T 2009-Dec-29 00:00 55.64508 27.65557 17.30 0.07037119211092 141.7806 /T 2009-Dec-30 00:00 58.96522 25.97933 17.51 0.07897403317931 143.6278 /T 2009-Dec-31 00:00 61.57834 24.58417 17.72 0.08782232663014 144.8492 /T 2010-Jan-01 00:00 63.68664 23.41566 17.92 0.09686053561705 145.6189 /T 2010-Jan-02 00:00 65.42470 22.42907 18.11 0.10605195309709 146.0575 /T 2010-Jan-03 00:00 66.88471 21.58913 18.30 0.11537188324121 146.2499 /T 2010-Jan-04 00:00 68.13159 20.86835 18.48 0.12480347257047 146.2563 /T 2010-Jan-05 00:00 69.21218 20.24534 18.65 0.13433508977857 146.1206 /T 2010-Jan-06 00:00 70.16108 19.70334 18.82 0.14395863508502 145.8746 /T 2010-Jan-07 00:00 71.00435 19.22910 18.98 0.15366842579939 145.5422 /T 2010-Jan-08 00:00 71.76196 18.81208 19.13 0.16346044953598 145.1415 /T 2010-Jan-09 00:00 72.44944 18.44377 19.28 0.17333185678335 144.6861 /T 2010-Jan-10 00:00 73.07907 18.11727 19.42 0.18328061127514 144.1868 /T 2010-Jan-11 00:00 73.66066 17.82691 19.55 0.19330524544996 143.6518 /T 2010-Jan-12 00:00 74.20212 17.56798 19.69 0.20340468679811 143.0878 /T 2010-Jan-13 00:00 74.70992 17.33658 19.81 0.21357813291731 142.5000 /T 2010-Jan-14 00:00 75.18936 17.12939 19.94 0.22382496085681 141.8927 /T 2010-Jan-15 00:00 75.64486 16.94362 20.06 0.23414466123703 141.2694 /T
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: 2048 for 1.95-Hz resolution
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 1
bandwidth 977.5 Hz
FFT 128
dfreq 7.6 Hz
TXoff +100 Hz (echo in bin 64+13 =77)
-------------------------------------------------------------------------------
0.125-usec
baud 0.125 usec
code 255
FFT 128
ncoh 62
bandwidth 506.0 Hz
resolution 3.95 Hz
TXOFF +100 Hz to put echo at 64 + 25 = bin 89
_____________________________________________________________________
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/2003YL118/PRDX.s???
/PUNCH.OUT.s???
/EPH.OUT.s???
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
Transmit offsets are given in millidegrees.
PRDX.OUT.s???
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2003 YL118 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/2003YL118/2003YL118_planning.html
Asteroid Radar Astronomy