2010 AL30 Goldstone Radar Observations Planning
2010 AL30 was discovered on Jan 10, 2010 by Lincoln Laboratory ETS in New Mexico. 2010 AL30 is a small object (11-25 m), but it will be an excellent radar target when it approaches within 0.3 lunar distances (LD) on Jan 13. Our track at Goldstone is scheduled from 02:20 UT to 04:40 UT, during which time the object goes from ~1 LD to 0.8 LD. Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta(LD) RTT(sec) 2010-Jan-13 02:00 102.56948 11.99381 1.04 2.7 2010-Jan-13 02:30 101.69986 12.13745 1.00 2.6 2010-Jan-13 03:00 100.75123 12.29088 0.96 2.4 2010-Jan-13 03:30 99.71286 12.45488 0.91 2.3 2010-Jan-13 04:00 98.57210 12.63027 0.87 2.2 2010-Jan-13 04:30 97.31399 12.81780 0.83 2.1 Due to a short RTT, we will be using bistatic setup with DSS-14 transmitting and DSS-13 receiving. 2010 AL30 is optically observable until Jan 13 after which it goes too close to the Sun. -------------------------------------------------------------------------------------------
Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.001 AU eccentricity 0.31 inclination 3.9° perihelion distance 0.695 AU aphelion distance 1.307 AU absolute magnitude (H) 26.9 diameter 11-25 m rotation period 9 min (William Ryan, private comm.) pole direction unknown lightcurve amplitude 0.2-0.3 (William Ryan, private comm.) spectral class unknown Last update: 2010 Jan 12
M.P.E.C. 2010-A59 Issued 2010 Jan. 11, 15:43 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
2010 AL30
Observations:
K10A30L* C2010 01 10.27372 07 56 21.69 +08 43 54.1 18.8 EA059704
K10A30L C2010 01 10.28653 07 56 17.04 +08 44 03.1 19.1 EA059704
K10A30L C2010 01 10.29935 07 56 12.26 +08 44 10.5 19.9 EA059704
K10A30L C2010 01 10.31215 07 56 07.52 +08 44 18.6 19.9 EA059704
K10A30L C2010 01 10.32497 07 56 02.62 +08 44 25.9 19.0 EA059704
K10A30L C2010 01 11.29321 07 51 24.76 +08 58 24.2 18.3 V EA059G96
K10A30L C2010 01 11.29368 07 51 24.44 +08 58 25.0 18.1 V EA059G96
K10A30L C2010 01 11.29412 07 51 24.15 +08 58 25.5 18.3 V EA059G96
K10A30L C2010 01 11.29455 07 51 23.86 +08 58 25.9 18.4 V EA059G96
K10A30L C2010 01 11.29498 07 51 23.58 +08 58 26.6 18.4 V EA059G96
K10A30L C2010 01 11.58340 07 48 59.75 +09 19 43.0 17.9 R EA059E16
K10A30L C2010 01 11.58801 07 48 55.85 +09 19 53.2 17.9 R EA059E16
K10A30L C2010 01 11.59153 07 48 52.86 +09 20 01.3 17.8 R EA059E16
K10A30L C2010 01 11.59622 07 48 48.85 +09 20 10.9 17.8 R EA059E16
K10A30L C2010 01 11.59769 07 48 47.58 +09 20 14.2 17.7 R EA059E16
K10A30L C2010 01 11.59891 07 48 46.52 +09 20 16.9 17.5 R EA059E16
Observer details:
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, G. Spitz,
R. Brungard, J. Paige, P. Festler. 1.0-m f/2.15 reflector + CCD.
E16 Grove Creek Observatory, Trunkey. Observers P. Camilleri, E. Guido,
M. Jaeger, E. Prosperi, G. Sostero, W. Vollmann. Measurer G. Sostero.
0.35-m f/7 reflector + CCD.
G96 Mt. Lemmon Survey. Observer A. Boattini. Measurers J. D. Ahern,
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.
Orbital elements:
2010 AL30 Earth MOID = 0.0000 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC
M 281.40401 (2000.0) P Q
n 0.98349499 Peri. 104.60232 -0.78960713 +0.61038481
a 1.0014316 Node 113.05422 -0.58599752 -0.71971978
e 0.3055892 Incl. 3.91707 -0.18200958 -0.33080782
P 1.00 H 27.0 G 0.15 U 7
Residuals in seconds of arc
100110 704 0.2+ 0.1- 100111 G96 0.0 0.1+ 100111 E16 0.2+ 0.3+
100110 704 0.3+ 0.4+ 100111 G96 0.1+ 0.0 100111 E16 0.2+ 0.1-
100110 704 0.3- 0.3- 100111 G96 0.1+ 0.2- 100111 E16 0.0 0.1+
100110 704 0.5+ 0.0 100111 G96 0.2+ 0.1- 100111 E16 0.2- 0.2+
100110 704 0.2- 0.2- 100111 E16 0.2+ 0.5-
100111 G96 0.1+ 0.0 100111 E16 0.2+ 0.2-
Ephemeris:
2010 AL30 a,e,i = 1.00, 0.31, 4 q = 0.6954
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2010 01 04 08 02.83 +08 33.1 0.0536 1.033 158.9 20.0 21.7
2010 01 06 08 02.11 +08 32.3 0.0422 1.023 160.7 18.5 21.1
2010 01 08 08 00.60 +08 34.8 0.0310 1.013 162.5 16.9 20.4
2010 01 10 07 57.06 +08 44.7 0.0198 1.003 164.6 15.1 19.3
2010 01 12 07 43.96 +09 26.4 0.00863 0.992 167.4 12.4 17.4
2010 01 12.5 07 32.83 +10 01.0 0.00586 0.989 168.4 11.6 16.5
2010 01 13.0 07 01.77 +11 29.9 0.00312 0.987 166.8 13.1 15.2
2010 01 13.5 02 43.97 +14 16.7 0.00088 0.984 109.9 70.0 14.2
2010 01 14.0 21 09.83 -04 15.7 0.00275 0.981 27.4 152.5
2010 01 14.5 20 29.22 -06 50.6 0.00548 0.978 18.1 161.8
2010 01 15.0 20 17.11 -07 34.4 0.00826 0.976 15.6 164.3
2010 01 15.5 20 10.98 -07 56.1 0.0110 0.973 14.3 165.6
2010 01 16 20 07.30 -08 09.1 0.0138 0.970 13.5 166.3
2010 01 18 20 00.78 -08 32.8 0.0250 0.959 12.1 167.6
2010 01 20 19 58.27 -08 43.6 0.0362 0.949 11.7 167.9
2010 01 22 19 56.95 -08 51.3 0.0475 0.938 11.8 167.6
2010 01 24 19 56.17 -08 58.3 0.0589 0.927 12.4 166.8
Sonia Keys (C) Copyright 2010 MPC M.P.E.C. 2010-A59
Target Name: 2010 AL30
HMag: 27
Diameter: 0.013 km (plus/minus a factor of two)
Period: 0.2 h (a conservative lower bound)
# max
Start date UT window RA, dec dist runs SNR SNR/run
----------------------------------------------------------------
2010 Jan 11 03:32-13:01 118, 9 0.012 700 35 1
2010 Jan 12 03:17-12:41 115, 10 0.007 700 280 11
2010 Jan 13 02:16-09:48 91, 13 0.002 700 35000 1400
2010 Jan 13 18:13-01:15 321, -4 0.002 700 14000 560
2010 Jan 14 16:41-00:22 305, -8 0.007 700 190 8
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
--- ---- --------- --------- --------- ------- -------
13 Jan 13 0220 0440 1820-2040 Jan 12 02:20 2.5 1400
From Jon Giorgini, Jan-12-2010: h 176 optical measurements (2010-Jan-10 06:35 to 2010-Jan-12 22:35), 2010 AL30 solution #14 was computed. Formal 3-sigma X-band uncertainties are below. Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2010-Jan-13 02:00 3.131 133.39 0.000786 2010-Jan-13 03:00 4.163 131.60 0.000738 2010-Jan-13 04:00 5.683 129.21 0.000691 2010-Jan-13 05:00 7.937 125.98 0.000646 From Jon Giorgini, Jan-12-2010: With 152 optical measurements (2010-Jan-10.3 to 2010-Jan-12.7), 2010 AL30 solution #10 was computed. Formal 3-sigma X-band uncertainties are below. Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2010-Jan-13 02:00 11.014 230.23 0.001013 2010-Jan-13 03:00 14.315 227.51 0.000957 2010-Jan-13 04:00 18.879 223.86 0.000908 2010-Jan-13 05:00 25.302 218.88 0.000864 JPL/Horizons solution #8: 115 measurements (2010-Jan-10 to 2010-Jan-12) Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2010-Jan-13 00:00 8.234 249.30 0.001264 2010-Jan-13 01:00 10.515 247.62 0.001204 2010-Jan-13 02:00 13.558 245.46 0.001149 2010-Jan-13 03:00 17.696 242.62 0.001102 2010-Jan-13 04:00 23.427 238.82 0.001060 2010-Jan-13 05:00 31.492 233.61 0.001024 From Jon Giorgini, 2010 Jan 11: With 16 measurements (2010-Jan-10 to 2010-Jan-11), 2010 AL30 solution #1 has formal 3-sigma X-band uncertainties as follows for the GSSR window: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2010-Jan-13 02:00 523.120 2514.66 0.022463 2010-Jan-13 03:00 653.159 2494.92 0.022887 2010-Jan-13 04:00 828.916 2468.07 0.023241 2010-Jan-13 05:00 1070.036 2430.87 0.023475 2010-Jan-13 06:00 1405.252 2378.37 0.023506 2010-Jan-13 07:00 1875.726 2302.85 0.023209 2010-Jan-13 08:00 2536.602 2192.33 0.022384 2010-Jan-13 09:00 3448.473 2028.59 0.020723 2010-Jan-13 10:00 4636.796 1786.26 0.017792 Optical observations: Date__(UT)__HR:MN R.A._(J2000.0)_DEC. APmag delta S-O-T /r 2010-Jan-11 00:00 118.27631 8.95303 18.47 0.01419572070134 165.8031 /L 2010-Jan-12 00:00 115.98821 9.43994 17.32 0.00863029779804 167.4414 /L 2010-Jan-13 00:00 105.42251 11.50283 15.13 0.00312014504303 166.8202 /T 2010-Jan-14 00:00 316.48796 -4.51550 n.a. 0.00276555895123 26.5012 /T NOTE: the object gets too close to the Sun after Jan 13
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: 8192 for 1-Hz resolution After the first orbital update, we will change CW setup to: TX polarization RCP RCV polarization LCP & RCP Frequency hops: 2 Dwell 10 seconds Bandwidth: 4000 Hz <-- NOTE THE BANDWIDTH! Sampling interval: 2500 x 0.1 usec VME FFT for PSD files: 4096 for 1-Hz resolution Chirp Test: ------------- Joseph and Clement recommended 20 MHz chirp with 20 usec PRP which will PFS sample at 20 MHz (0.05 usec baud) and Digital RCV at 80 MHz (0.0125 usec baud).
OSOD and predicts are on aardvark:
/export/data3/osod/ops/2010al30/PRDX.s14
/PUNCH.OUT.s14
/EPH.OUT.s14
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2010 01 13 013 020000 103.4307 11.5004 A 2.7
2010 01 13 013 030000 101.5861 11.8039 A -92.7 -2.7 2.4 s14
2010 01 13 013 040000 99.2992 12.1476 A 2.2
2010 01 13 013 040000 99.2992 12.1476 B 2.2
2010 01 13 013 050000 96.4412 12.5319 B -93.9 -3.4 2.0 s14
2010 01 13 013 060000 92.8389 12.9521 B 1.8
Transmit offsets are given in millidegrees.
PRDX.OUT.s14
TRANSMITTER: STATION #14, RECEIVER: STATION #13
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2010 JAN 13 02:20 2.5745927493 546204.969 287.8123 11.6000 102.859 21.147
2010 JAN 13 02:30 2.5363492560 544993.600 290.6207 11.6501 102.558 23.467
2010 JAN 13 02:40 2.4981940043 543686.790 293.4398 11.7013 102.245 25.795
2010 JAN 13 02:50 2.4601337709 542282.016 296.2703 11.7535 101.922 28.128
2010 JAN 13 03:00 2.4221755121 540776.660 299.1124 11.8069 101.586 30.465
2010 JAN 13 03:10 2.3843263730 539167.988 301.9668 11.8614 101.239 32.803
2010 JAN 13 03:20 2.3465936939 537453.145 304.8339 11.9170 100.879 35.141
2010 JAN 13 03:30 2.3089850236 535629.129 307.7143 11.9738 100.505 37.477
2010 JAN 13 03:40 2.2715081233 533692.776 310.6086 12.0317 100.118 39.805
2010 JAN 13 03:50 2.2341709816 531640.743 313.5173 12.0908 99.716 42.125
2010 JAN 13 04:00 2.1969818290 529469.480 316.4412 12.1510 99.299 44.429
2010 JAN 13 04:10 2.1599491588 527175.210 319.3808 12.2123 98.866 46.714
2010 JAN 13 04:20 2.1230817313 524753.903 322.3369 12.2748 98.417 48.973
2010 JAN 13 04:30 2.0863885985 522201.247 325.3102 12.3383 97.950 51.198
2010 JAN 13 04:40 2.0498791275 519512.617 328.3014 12.4030 97.466 53.377
2010 AL30 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/2010AL30/2010AL30_planning.html
Asteroid Radar Astronomy