2012 HM and 2012 HP13 Goldstone Radar Observations Planning
We have one track scheduled on DOY 118-119 (April 27-28) to observe two newly-discovered near-Earth asteroids: 2012 HM and 2012 HP13. Both objects will be within a few lunar distances so the observations will be bistatic. 2012 HM: 2012 HM was discovered by LINEAR in New Mexico on April 16, 2012. It will approach within 0.0037 AU (1.4 lunar distances) on April 28 and we have one track scheduled at Goldstone on that date to observe it with radar. Due to the very short round-trip light travel time, the observations will be bistatic with transmissions at DSS-14 and reception of echoes at DSS-13. At the time of the Goldstone observations on April 28, the asteroid's distance will shrink from 0.0042 - 0.0040 AU. The absolute magnitude of 2012 HM is 24.0, suggesting a diameter within a factor of two of about 60 meters, but otherwise nothing is known about its physical properties. 2012 HM will be a strong radar target and we hope to image it with resolutions as fine as 4 meters. Note added on April 26: Carl Hergenrother has reported photometry suggesting that 2012 HM is a slow rotator with a period of many hours. Consequently, the SNRs may be significantly stronger than tabulated below. 2012 HP13: 2012 HP13 was discovered on April 22 by the Catalina Sky Survey near Tucson. Its closest approach will occur on April 27 at a distance of only 0.0051 AU (2.0 lunar distances) about one day before the time we have scheduled on DSS-14 and DSS-13. Even so, this asteroid will still be very close to Earth and it should be detectable at Goldstone. Of the two asteroids, we expect that 2012 HM will be the stronger target so we intend to devote most of the track to that asteroid, but we'll try 2012 HP13 near the end of our time. Very little is known about 2012 HP13: only its absolute magnitude of 24.1, which suggests a diameter of roughly 50 meters. We expect it to be a reasonably strong CW target but probably not an imaging target. At the time of the observations, its distance will be about 0.007 AU from Earth, or slightly less than three lunar distances.
Orbital and Physical Characteristics
2012 HM 2012 HP13
orbit type Apollo Aten
semimajor axis 1.165 AU 0.981 AU
eccentricity 0.196 0.177
inclination 7.0 deg 23.0 deg
perihelion distance 0.937 AU 0.808 AU
aphelion distance 1.393 AU 1.155 AU
absolute magnitude (H) 24.0 24.1
diameter ~0.06 km ~0.05 km (Educated guesses based on the absolute magnitudes)
rotation period unknown unknown
pole direction unknown unknown
lightcurve amplitude unknown unknown
spectral class unknown unknown
Last update: 2012 Apr 27
2012 HM
M.P.E.C. 2012-H13 Issued 2012 Apr. 17, 14:42 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.minorplanetcenter.net/ ISSN 1523-6714
2012 HM
Observations:
K12H00M* C2012 04 16.29304 14 04 35.84 +29 59 47.6 18.5 cEH013704
K12H00M C2012 04 16.30418 14 04 34.43 +30 00 06.3 18.7 cEH013704
K12H00M C2012 04 16.31542 14 04 33.10 +30 00 25.7 18.6 cEH013704
K12H00M C2012 04 16.32650 14 04 31.68 +30 00 44.5 19.1 cEH013704
K12H00M C2012 04 16.33773 14 04 30.30 +30 01 01.2 18.8 cEH013704
K12H00M KC2012 04 17.29024014 03 43.15 +30 28 42.7 18.8 VrEH013H21
K12H00M KC2012 04 17.29553614 03 42.44 +30 28 51.9 18.8 VrEH013H21
K12H00M KC2012 04 17.30143014 03 41.67 +30 29 02.3 18.8 VrEH013H21
K12H00M C2012 04 17.43119 14 03 28.48 +30 33 07.2 18.0 RoEH013H01
K12H00M C2012 04 17.43888 14 03 27.54 +30 33 18.7 18.2 RoEH013H01
K12H00M C2012 04 17.44472 14 03 26.86 +30 33 27.4 18.2 RoEH013H01
K12H00M C2012 04 17.45498 14 03 25.69 +30 33 42.6 18.0 RoEH013H01
K12H00M C2012 04 17.53053 14 03 40.90 +30 36 18.9 18.8 VuEH013900
K12H00M C2012 04 17.54124 14 03 39.52 +30 36 43.2 18.3 VuEH013900
K12H00M C2012 04 17.55194 14 03 38.13 +30 37 08.0 18.5 VuEH013900
Observer details:
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, G. Spitz,
R. Brungard, J. Paige, P. Festler, T. McVey, A. Valdivia, C. Gall. 1.0-m
f/2.15 reflector + CCD.
900 Moriyama. Observer Y. Ikari. 0.26-m f/7.0 reflector + CCD.
H01 Magdalena Ridge Observatory, Socorro. Observer W. H. Ryan. 2.4-m f/8.9
reflector + CCD.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers L. Buzzi, H. Devore, S. Foglia, T. Vorobjov. 0.61-m f/4.0
astrograph + CCD.
Orbital elements:
2012 HM Earth MOID = 0.0031 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 286.90546 (2000.0) P Q
n 0.78446645 Peri. 233.07610 +0.03617090 +0.99639820
a 1.1643578 Node 39.21083 -0.87397380 +0.06875736
e 0.1953500 Incl. 6.96834 -0.48462508 -0.04962911
P 1.26 H 23.7 G 0.15 U 8
Residuals in seconds of arc
120416 704 0.4+ 0.0 120417 H21 0.2- 0.1- 120417 H01 0.1+ 0.0
120416 704 0.2- 0.4- 120417 H21 0.3- 0.2- 120417 H01 0.0 0.1+
120416 704 0.5+ 0.2+ 120417 H21 0.2- 0.1- 120417 900 0.2+ 0.2-
120416 704 0.3- 0.8+ 120417 H01 0.3+ 0.1+ 120417 900 0.1- 0.3-
120416 704 0.2- 0.6- 120417 H01 0.0 0.0 120417 900 0.0 0.5+
Ephemeris:
2012 HM a,e,i = 1.16, 0.20, 7 q = 0.9369
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2012 03 18 13 59 56.1 +22 10 25 0.1633 1.1288 142.2 32.7 21.4
...
2012 04 02 14 06 44.2 +25 40 40 0.09961 1.0814 143.7 33.2 20.3
...
2012 04 10 14 07 01.0 +27 45 36 0.06851 1.0568 142.2 35.6 19.5
...
2012 04 16 14 04 46.6 +29 52 02 0.04596 1.0389 139.5 38.9 18.6
2012 04 17 14 04 00.9 +30 20 22 0.04226 1.0360 138.8 39.7 18.5
2012 04 18 14 03 04.3 +30 52 33 0.03857 1.0332 138.1 40.5 18.3
...
2012 04 24 13 46 48.2 +37 56 26 0.01670 1.0164 129.0 50.3 16.7
...
2012 05 02 02 36 36.7 -13 18 36 0.01370 0.9958 28.7 150.9 23.0
...
2012 05 17 02 17 01.6 -23 39 39 0.06925 0.9655 47.1 129.9 23.5
A. U. Tomatic (C) Copyright 2012 MPC M.P.E.C. 2012-H13
--------------------------------------------------------------------------------
2012 HP13
M.P.E.C. 2012-H60 Issued 2012 Apr. 23, 22:12 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.minorplanetcenter.net/ ISSN 1523-6714
2012 HP13
Observations:
K12H13P* C2012 04 22.46032 16 29 28.64 +44 13 51.0 19.4 VrEH060703
K12H13P C2012 04 22.46712 16 29 24.97 +44 14 15.6 19.1 VrEH060703
K12H13P C2012 04 22.48071 16 29 17.62 +44 15 03.2 19.1 VrEH060703
K12H13P C2012 04 22.49352 16 29 10.68 +44 15 48.2 19.8 VrEH060703
K12H13P C2012 04 22.49406 16 29 10.35 +44 15 49.8 18.8 VrEH060703
K12H13P C2012 04 22.49464 16 29 10.03 +44 15 52.3 18.4 VrEH060703
K12H13P C2012 04 22.49521 16 29 09.92 +44 15 53.8 19.3 VrEH060703
K12H13P KC2012 04 22.86720 16 26 39.19 +44 39 38.3 18.6 RrEH060A17
K12H13P KC2012 04 22.88543 16 26 29.21 +44 41 13.9 18.5 RrEH060A17
K12H13P KC2012 04 22.90003 16 26 21.01 +44 42 31.2 18.3 RrEH060A17
K12H13P KC2012 04 22.90588 16 26 17.64 +44 43 01.6 18.4 RrEH060A17
K12H13P KC2012 04 22.91440 16 26 12.69 +44 43 46.1 18.4 RrEH060A17
K12H13P KC2012 04 23.07909 16 24 24.54 +44 57 51.4 uEH060118
K12H13P KC2012 04 23.08345 16 24 21.60 +44 58 12.4 uEH060118
K12H13P KC2012 04 23.08797 16 24 18.42 +44 58 34.1 uEH060118
K12H13P KC2012 04 23.09182 16 24 15.92 +44 58 51.2 uEH060118
K12H13P KC2012 04 23.09751 16 24 11.89 +44 59 19.1 uEH060118
K12H13P KC2012 04 23.39034 16 21 08.71 +45 26 00.1 18.7 RuEH060H36
K12H13P KC2012 04 23.39171 16 21 07.57 +45 26 07.5 18.7 RuEH060H36
K12H13P KC2012 04 23.39306 16 21 06.46 +45 26 15.0 18.7 RuEH060H36
K12H13P KC2012 04 23.39578 16 21 04.21 +45 26 30.3 18.7 RuEH060H36
K12H13P KC2012 04 23.40648416 20 52.71 +45 27 15.5 18.7 VrEH060H21
K12H13P KC2012 04 23.40924916 20 50.45 +45 27 30.1 18.7 VrEH060H21
K12H13P KC2012 04 23.41189616 20 48.29 +45 27 43.7 18.6 VrEH060H21
K12H13P KC2012 04 23.41454216 20 46.11 +45 27 57.6 18.7 VrEH060H21
K12H13P C2012 04 23.74403 16 16 41.53 +46 02 32.0 18.4 RoEH060300
K12H13P C2012 04 23.74603 16 16 39.51 +46 02 44.0 18.4 RoEH060300
K12H13P C2012 04 23.74800 16 16 37.51 +46 02 56.4 18.4 RoEH060300
K12H13P C2012 04 23.74997 16 16 35.54 +46 03 09.6 18.5 RoEH060300
Observer details:
118 Modra. Observers S. Gajdos, J. Vilagi. Measurer S. Gajdos. 0.6-m f/5.5
reflector + CCD.
300 Bisei Spaceguard Center--BATTeRS. Observers S. Urakawa, N. Hashimoto.
1.0-m f/3.0 reflector + CCD.
703 Catalina Sky Survey. Observer A. Boattini. Measurers J. D. Ahern,
E. C. Beshore, A. Boattini, G. J. Garradd, A. R. Gibbs, P. Tricarico,
A. D. Grauer, R. E. Hill, R. A. Kowalski, S. M. Larson, R. H. McNaught.
0.68-m Schmidt + CCD.
A17 Guidestar Observatory, Weinheim. Observers M. Emmerich, S. Melchert.
0.36-m f/6 Schmidt-Cassegrain + CCD.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers L. Buzzi, H. Devore, S. Foglia, T. Vorobjov. 0.61-m f/4.0
astrograph + CCD.
H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.56-m reflector + CCD.
Orbital elements:
2012 HP13 Earth MOID = 0.0007 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 226.64610 (2000.0) P Q
n 1.01424053 Peri. 288.21737 +0.77726599 +0.58340163
a 0.9810898 Node 37.14109 -0.31904245 +0.68819112
e 0.1768496 Incl. 22.96589 -0.54228175 +0.43131835
P 0.97 H 24.1 G 0.15 U 7
Residuals in seconds of arc
120422 703 0.5- 0.1- 120422 A17 0.3+ 0.2+ 120423 H36 0.2- 0.4+
120422 703 0.3- 0.1+ 120422 A17 0.0 0.1- 120423 H21 0.4+ 0.6-
120422 703 0.0 0.4- 120423 118 0.7- 0.4+ 120423 H21 0.4+ 0.5-
120422 703 0.0 0.1- 120423 118 0.2- 0.7+ 120423 H21 0.4+ 0.7-
120422 703 0.4- 0.4- 120423 118 1.0- 0.9+ 120423 H21 0.3+ 0.6-
120422 703 0.5- 0.1+ 120423 118 0.6+ 0.2- 120423 300 0.0 0.9+
120422 703 1.6+ 0.3- 120423 118 0.6- 0.8+ 120423 300 0.1- 0.0
120422 A17 0.0 0.0 120423 H36 0.2+ 0.3- 120423 300 0.3- 0.3-
120422 A17 0.3+ 0.1- 120423 H36 0.0 0.3- 120423 300 0.2- 0.2+
120422 A17 0.5+ 0.5+ 120423 H36 0.0 0.1-
Ephemeris:
2012 HP13 a,e,i = 0.98, 0.18, 23 q = 0.8076
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
...
2012 04 22 16 32 32.7 +43 45 42 0.03949 1.0220 114.1 63.9 19.4
2012 04 23 16 25 13.0 +44 51 42 0.03215 1.0191 114.2 64.1 18.9
2012 04 24 16 12 53.5 +46 31 28 0.02484 1.0162 114.3 64.5 18.4
...
2012 04 30 05 46 35.5 -28 45 12 0.02089 0.9985 64.4 114.5 20.1
...
A. U. Tomatic (C) Copyright 2012 MPC M.P.E.C. 2012-H60
2012 HM
D = 0.06 km
P = 0.5 h
OC albedo = 0.1
UTC
Date window RA, dec dist runs SNR/RTT
---------------------------------------------------------------
2012 Apr 25 00:58-13:24 204 +42 0.012 1888 3
2012 Apr 26 00:20-13:17 198 +49 0.009 2768 10
2012 Apr 26-27 22:52-12:34 181 +60 0.006 4763 41
2012 Apr 27-28 18:30-06:41 112 +67 0.004 7788 150
2012 Apr 28-29 15:28-02:24 59 +33 0.004 5198 140
2012 Apr 29-30 15:44-00:42 47 +5 0.006 2588 28
2012 Apr 30 16:00-23:49 42 -7 0.010 1487 7
2012 May 01 16:10-23:17 40 -13 0.013 991 2
- - - - - - - - - - - - - - - - - - - -
2012 HP13
D = 0.054 km
P = 0.5 h
OC albedo = 0.1
UTC
Date window RA, dec dist runs SNR/RTT
---------------------------------------------------------------
2012 Apr 25 02:36-15:39 233, +51 0.015 1643 1
2012 Apr 26 01:04-13:28 208, +56 0.009 2955 8
2012 Apr 26-27 21:38-07:46 144, +41 0.005 4381 52
2012 Apr 27-28 20:18-03:53 105, -6 0.007 1959 14
2012 Apr 28-29 20:41-02:01 92, -23 0.014 724 2
The SNRs are for transmission at DSS-14 and reception at DSS-13.
Here "runs" really refer to round-trip travel times because the observations are bistatic.
Goldstone SNRs assume Ptx = 450 kW
These SNRs assume monostatic observations at DSS-14. Bistatic SNRs
will be several times weaker.
Goldstone track:
UT UT PST Duration Round-trip
DOY Date TX Window TX Window hh:mm time (sec) SNR/Run
--- ---- --------- --------- --------- --------- -------
118 Apr 27-28 2130-0045 1430-1745 Apr 27 03:15 4.2-4.0 150 2012 HM
6.8-7.6 14 2012 HP13
TXON is given at the earliest possible transmit time. The nominal TXSTA is at 22:30 UT.
2012 HM From Jon Giorgini, 2012 Apr 27: Now with 486 optical measurements (Apr 16-27, 2012), 2012 HM orbit solution #16 was estimated. OSOD files and nominal predicts have been updated. Formal 3-sigma X-band s10 uncertainties: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2012-Apr-27 21:30 4.499 169.95 0.004588 2012-Apr-27 22:30 4.838 158.60 0.004519 2012-Apr-27 23:30 5.347 146.80 0.004456 2012-Apr-28 00:30 6.028 134.56 0.004397 - - - - - - - - - - From Jon Giorgini, 2012 Apr 26: Including the latest optical, so as to obtain a dataset of 391 measurements spanning 2012-Apr-16 to 2012-Apr-25, orbit solution #14 was estimated and the predicts on aardvark updated. Formal 3-sigma X-band uncertainties: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2012-Apr-26 00:00 1.799 437.82 0.012714 2012-Apr-27 00:00 7.830 382.17 0.008579 2012-Apr-28 00:00 36.034 189.62 0.005552 2012-Apr-29 00:00 56.666 227.39 0.005737 Here are the s14 uncertainties over the specified interval: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2012-Apr-27 21:00 30.138 225.08 0.005809 2012-Apr-27 22:00 31.987 213.49 0.005718 2012-Apr-27 23:00 33.958 201.67 0.005632 2012-Apr-28 00:00 36.034 189.62 0.005552 2012-Apr-28 01:00 38.187 177.37 0.005477 - - - - - - - - - - - - - - - - - - - - From Horizons, 2012 Apr 25: Solution 11, #obs = 274 (9 days): Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2012-Apr-25 00:00 *m 204.63790 41.06314 0.01310258292221 1.194 180.68 656.68 0.024701 2012-Apr-26 00:00 *m 200.28805 46.46799 0.00963546887024 2.350 172.87 628.29 0.018270 2012-Apr-27 00:00 *m 187.96023 56.83313 0.00639508187804 9.158 151.00 548.81 0.012327 2012-Apr-28 00:00 *m 117.53002 67.91742 0.00399067178702 42.072 74.41 270.45 0.007972 2012-Apr-29 00:00 *m 56.30056 27.99089 0.00425334836811 70.821 87.04 316.36 0.008222 2012-Apr-30 00:00 *m 45.24543 2.23518 0.00688643788093 56.485 154.95 563.17 0.012870 2012-May-01 00:00 *m 41.13443 -8.23762 0.01019087801191 49.546 174.62 634.65 0.018923 - - - - - - - - - - - - - - - - - - - From Jon Giorgini, 2012 Apr. 23: Based on the 231 optical measurements (2012-Apr-16 to 2012-Apr-22), 2012 HM orbit solution #9 was computed and OSOD with nominal radar predicts for Arecibo and DSS 14->13. Formal 3-sigma S/X-band uncertainty for s9 are: Date__(UT)__HR:MN POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2012-Apr-24 00:00 4.554 274.67 998.26 0.046399 2012-Apr-25 00:00 11.628 269.12 978.09 0.036695 2012-Apr-26 00:00 31.655 256.92 933.78 0.027387 2012-Apr-27 00:00 99.417 223.12 810.93 0.018926 2012-Apr-28 00:00 335.298 181.10 658.19 0.012248 2012-Apr-29 00:00 377.663 216.08 785.35 0.012745 -------------------------------------------------------------------- -------------------------------------------------------------------- 2012 HP13 Now with 147 optical measurements (Aprt 22-26, 2012), 2012 HP13 orbit solution #10 was estimated. OSOD files and nominal predicts have been updated. Formal 3-sigma X-band s10 uncertainties: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2012-Apr-27 21:30 5.538 547.75 0.007479 2012-Apr-27 22:30 5.497 566.21 0.007710 2012-Apr-27 23:30 5.473 583.05 0.007950 2012-Apr-28 00:30 5.466 598.42 0.008195 - - - - - - - - - - - - From Jon Giorgini, 2012 Apr. 26: Now with 92 optical measurements (2012-Apr-22 to 2012-Apr-25), 2012 HP13 orbit solution #8 was computed and the nominal predicts in the /2012hp13 sub-directory updated. Formal 3-sigma X-band uncertainties are: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2012-Apr-26 00:00 6.541 1208.82 0.019337 2012-Apr-27 00:00 73.686 499.97 0.009834 2012-Apr-28 00:00 76.764 1058.07 0.013988 2012-Apr-29 00:00 36.203 1288.16 0.026019 Focusing on the transmit window, one can see pointing still can't be guaranteed. Data reported tonight should improve the situation. Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2012-Apr-27 21:30 84.410 998.15 0.012926 2012-Apr-27 22:00 82.858 1011.28 0.013133 2012-Apr-27 22:30 81.313 1023.81 0.013342 2012-Apr-27 23:00 79.780 1035.76 0.013555 2012-Apr-27 23:30 78.262 1047.17 0.013770 2012-Apr-28 00:00 76.764 1058.07 0.013988 2012-Apr-28 00:30 75.287 1068.47 0.014208 2012-Apr-28 01:00 73.836 1078.42 0.014430 - - - - - - - - - - - - - - - - - - - - From Horizons, 2012 Apr 25: Solution 4, #obs = 49 (3 days): Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2012-Apr-26 00:00 *m 220.33819 54.04061 0.01071548097868 15.849 638.49 2320.55 0.041852 2012-Apr-27 00:00 *m 155.17685 47.27551 0.00542377412523 166.179 372.78 1354.86 0.022271 2012-Apr-28 00:00 *m 104.64588 -5.57951 0.00742593189780 173.088 467.27 1698.26 0.024848 2012-Apr-29 00:00 *m 91.74734 -23.07609 0.01385262349436 85.096 657.46 2389.50 0.046298 2012-Apr-30 00:00 *m 86.57415 -28.90529 0.02096325484386 57.965 695.73 2528.61 0.071010 2012-May-01 00:00 *m 83.81718 -31.67559 0.02824255872477 46.459 708.28 2574.19 0.096532 - - - - - - - - - - - - - - - - - - - - From Jon Giorgini, 2012 Apr 24: With the existing dataset of 29 optical measurements spanning Apr 22-23 (2012), orbit solution #3 was established for DSS-14, with OSOD and nominal predicts in the /2012hp13 sub-directory. Formal 3-sigma X-band uncertainties: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2012-Apr-27 00:00 1649.658 4432.60 0.026822 2012-Apr-28 00:00 1394.925 5861.96 0.062267 2012-Apr-29 00:00 576.418 4359.81 0.109831 ****************************************************************************************** Apparent Magnitudes and Solar Elongations: 2012 HM Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r 2012-Apr-24 00:00 206.69897 37.94563 0.01669356682502 17.08 128.9658 /T 2012-Apr-25 00:00 204.44674 41.17429 0.01313743349167 16.66 125.0958 /T 2012-Apr-26 00:00 199.99752 46.59868 0.00966877044048 16.18 118.6401 /T 2012-Apr-27 00:00 187.40507 56.94107 0.00643085674840 15.70 105.6983 /T 2012-Apr-28 00:00 117.23852 67.62463 0.00403568318748 16.04 73.7610 /T 2012-Apr-29 00:00 56.69575 28.17797 0.00429398877742 n.a. 23.1938 /T 2012-Apr-30 00:00 45.49868 2.46615 0.00691671903368 n.a. 14.6339 /T 2012-May-01 00:00 41.31705 -8.06389 0.01021910405121 n.a. 23.3212 /T After April 28 this object will be too close to the Sun to observe with optical ground-based telescopes. 2012 HP13 Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r 2012-Apr-25 00:00 237.07692 49.30035 0.01763967146232 17.71 113.9168 /L 2012-Apr-26 00:00 220.11231 54.19146 0.01073036419333 16.69 112.0700 /L 2012-Apr-27 00:00 154.93353 47.40018 0.00546063520907 15.67 98.9532 /T 2012-Apr-28 00:00 104.70136 -5.24805 0.00743838938656 17.58 71.2360 /T 2012-Apr-29 00:00 91.80930 -22.88078 0.01384078185527 19.24 65.7375 /T 2012-Apr-30 00:00 86.62691 -28.77594 0.02093611363484 20.20 64.4324 /T 2012-May-01 00:00 83.86243 -31.57992 0.02820283322189 20.85 63.8324 /T 2012-May-02 00:00 82.13952 -33.19303 0.03553298702192 21.35 63.4315 /T 2012-May-03 00:00 80.95498 -34.22920 0.04289122563840 21.75 63.1068 /T
We know nothing about the rotation period of either object, but most NEAs this small are
often rapid rotators, so we'll start with a setup that should resolve them in Doppler
frequency and allow us to see echoes quickly. We'll start with 2012 HM because it will
be a much stronger target.
CW setup:
---------------------------------------------------------------------------
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: 2
Dwell 30 seconds
Bandwidth: 4000 Hz
Sampling interval: 2500 x 0.1 usec
VME FFT for PSD files: 4096 for 0.98-Hz resolution
Ranging setups:
---------------------------------------------------------------------------
127 x 64 10-usec
baud 10 usec
code 127
PRP 1270 usec
FFT 64
ncoh 1
bandwidth 787 Hz
resolution 12.3 Hz
TXOFF +150 Hz (echo in bin 32+12=44)
---------------------------------------------------------------------------
127 x 64 11-usec
baud 11 usec
code 127
PRP 1397 usec
FFT 64
ncoh 1
bandwidth 717 Hz
resolution 11.2 Hz
TXOFF +150 Hz (echo in bin 32+13=45)
-------------------------------------------------------------------------
1-usec
baud 1 usec
code 255
ncoh 6
bandwidth 654 Hz
FFT 128
dfreq 5.1 Hz
TXoff +80 Hz (echo in bin 64+16 =80)
-------------------------------------------------------------------------------
_____________________________________________________________________
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 bistatic predicts are on aardvark:
2012 HM:
/export/data3/osod/ops/2012hm/PRDX.OUT.14f-13-13.s16
/PUNCH.OUT.14f-13-13.s16
/EPH.OUT.s16
for WFG:
/export/data3/osod/ops/2012hm/PRDX.OUT.14v-13-13.s16
/PUNCH.OUT.14v-13-13.s16
/EPH.OUT.s16
- - - - - - - - - -
2012 HP13:
/export/data3/osod/ops/2012hp13/PRDX.OUT.14f-13-13.s10
/PUNCH.OUT.14f-13-13.s10
/EPH.OUT.s10
for WFG:
/export/data3/osod/ops/2012hp13/PRDX.OUT.14v-13-13.s10
/PUNCH.OUT.14v-13-13.s10
/EPH.OUT.s10
POINTING
2012 HM
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2012 04 27 118 210000 134.1698 68.4491 A 4.2 16
2012 04 27 118 220000 128.9223 68.4624 A 6.1 -0.1 4.1
2012 04 27 118 230000 123.4472 68.2854 AB 4.1
2012 04 28 119 000000 117.8703 67.8908 B 6.1 -0.5 4.0
2012 04 28 119 010000 112.3389 67.2621 B 3.9
2012 HP13
TX offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2012 04 27 118 210000 108.0124 -1.1411 A 6.8 10
2012 04 27 118 220000 106.8915 -2.7169 A 2.1 -3.0 7.0
2012 04 27 118 230000 105.8215 -4.1995 AB 7.2
2012 04 28 119 000000 104.8039 -5.5924 B 2.0 -2.8 7.4
2012 04 28 119 010000 103.8405 -6.8993 B 7.6
Transmit offsets are given in millidegrees.
PRDX.OUT.14f-13-13.s16
TRANSMITTER: STATION #14, RECEIVER: STATION #13
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
...coming soon for both objects...
2012 HM and 2012 HP13 GOLDSTONE MASTERLOGS
==============================================================================
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 183-610 | 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/2012HM/2012HM_planning.html
Asteroid Radar Astronomy