Goldstone Radar Detection of 2014 RC
Goldstone Radar Observations Planning: (276049) 2002 CE26 and 2014 RC
Bistatic delay-Doppler image from Sep. 7. Resolution is 3.75 m x 50 Hz. This is a 16-second integration that spans one full rotation by the asteroid. The asteroid rotates so rapidly and it's so small that the radar images do not show any detail. Range increases downward and Doppler frequency increases to the right. At the time of the observations, the asteroid was slightly more than one lunar distance from Earth.
This is a planning page for Goldstone observations of two near-Earth asteroids: 2002 CE26 and 2014 RC Brief descriptions of each object appear below. 2002 CE26 2002 CE26 is a binary system previously observed with radar at Arecibo in 2004. Orbital fits, a 3D model of the primary, and other radar results were published by Shepard et al. (2006). It was also observed by NASA's Wide-field Infrared Survey Explorer (WISE) spacecraft. The radar and WISE data yield diameters of 3.5 and 3.3 km that are consistent within their uncertainties. The primary has a rotation period of 3.3 h and the secondary has an orbital period of about 16 h. Shepard et al. estimate that the secondary is roughly 0.3 km in diameter. The radar results hint that this object could have a second companion, but the SNRs in 2004 were insufficient to verify this. The primary is spheroidal but it has subtle topographic features that are visible in the 2004 radar images. The fits yield a bulk density for the primary of 0.9 +- 0.5 g/cm^3, which implies a significant degree of porosity in the primary's interior. This object was discovered by LINEAR on 10 February 2002. 2002 CE26 will make a relatively distant approach within 0.123 AU on September 9, but due to the diameter of the primary and its radar albedo of 0.24, we should be able to get coarse-resolution images at Goldstone. Echoes from the secondary will be weak and on the edge of detectability. Observations at Goldstone are scheduled on September 5-7. We will also do radar speckle observations on Sep. 7 using transmissions at Goldstone and reception with the Very Long Baseline Array antennas at Owens Valley, Pie Town, Kitt Peak, Fort Davis, and Los Alamos. Arecibo observations are scheduled from Aug. 31-Sep. 5, and thus will occur before the observations at Goldstone. This object should reach 14th magnitude while at favorable solar elongations, so it should be an excellent target for lightcurves. Lightcurves might detect the signature of at least one satellite and could help refine the orbital period. 2014 RC 2014 RC is an object roughly 15 meters in diameter that will make an extremely close approach to Earth at 0.1 Earth-Moon distances on 2014 September 7. Nothing is known about the asteroid other than a crude estimate of its diameter, but the close approach distance indicates that this object will be a very strong radar target on Sep. 7. This will be one of the closest approaches known an object of this size or larger. The encounter provides an excellent opportunity to study the physical properties of this object, which is in a size class that is not well understood. 2014 RC was discovered by the Catalina Sky Survey on Sep. 1. 2014 RC is above the horizon during tracks previously scheduled for Goldstone observations of 2002 CE26, so we plan to observe both objects during Sep. 5, 6, and 7. There are no plans to observe 2014 RC at Arecibo. At the time of the closest approach, this asteroid should reach 11th magnitude and be bright enough to see in small telescopes by experienced observers. Due to the close approach, it's possible that the spin state of this object might change, although obtaining enough observations before and after the approach to obtain convincing evidence for spin changes will be difficult. The close encounter with Earth changed the asteroid's heliocentric orbital elements and shortened the orbital period by about 51 days. 2014 RC is on the NHATS list of potential human mission targets. NASA Press Releases about 2014 RC: A NASA press release about 2014 RC BEFORE the flyby is available here. A subsequent press release AFTER the flyby is available here.
Orbital and Physical Characteristics
Provisional Designation 2002 CE26 2014 RC
Asteroid number 276049 Not numbered
Discoverer LINEAR Catalina Sky Survey
Discovery date 2002 February 10 2014 Sep 1
orbit type Apollo Apollo
Close approach dist. 0.123 AU 0.00084 AU
Close approach date 2014 Sep 9 2014 Sep 7
semimajor axis 2.234 AU 1.390 AU
eccentricity 0.559 0.399
inclination 47.3 deg 1.4 deg
perihelion distance 0.985 AU 0.835
aphelion distance 3.482 AU 1.945 AU
Tisserand parameter 3.066 (asteroidal)
absolute magnitude (H) 16.8 26.5 +- 0.4 or so
Primary diameter 3.3 km Mainzer et al. 2011 ~20 meters (combination of lightcurves and radar echo bandwidth)
3.5 +- 0.3 km Shepard et al. 2006
Secondary diameter ~0.3 km Shepard et al. 2006 N/A
optical albedo 0.03 Mainzer et al. 2011 Unknown
radar albedo 0.24 Shepard et al. 2006 Unknown
rotation period 3.293 h Pravec et al. 2006 (primary) 15.8 seconds (Thirouin, Skiff, & Moskovitz, pers. comm.)
Orbital period ~16 h Pravec et al. 2006 (secondary) N/A
15.6 +- 0.1 h Shepard et al. 2006
pole direction lambda,beta = 317, -20 +- a few tens of deg Unknown
lightcurve amplitude 0.06 mag Pravec et al. 2006 0.1 mag (Thirouin, Skiff, & Moskovitz, pers. comm.)
spectral class C Sq (Binzel, Polishook, and Bus, pers. comm.)
Last update: 2014 September 10
2002 CE26 http://www.minorplanetcenter.net/mpec/K02/K02C78.html 2014 RC http://www.minorplanetcenter.net/mpec/K14/K14R23.html
2002 CE26
GOLDSTONE SNRS
Assumptions: D = 3.5 km, P = 3.293 h, OC radar albedo = 0.24
<----PRIMARY----> <----SECONDARY---->
w DOY start date window RA, dec dist runs SNR/day SNR/run SNR/day SNR/run
35 241 2014 Aug 29 01:11-12:25 323, +28 0.209 97 29 3 2 0
35 242 2014 Aug 30 01:12-12:13 322, +26 0.197 101 37 4 2 0
35 243 2014 Aug 31 01:14-12:00 322, +23 0.185 105 47 5 3 0
36 244 2014 Sep 01 01:17-11:45 322, +20 0.174 109 60 6 3 0
36 245 2014 Sep 02 01:21-11:30 321, +16 0.163 112 77 8 4 0
36 246 2014 Sep 03 01:26-11:12 321, +12 0.153 115 96 10 5 1
36 247 2014 Sep 04 01:34-10:53 320, +7 0.145 116 118 12 6 1
36 248 2014 Sep 05 01:43-10:31 320, +1 0.137 116 141 14 8 1 Scheduled
36 249 2014 Sep 06 01:56-10:05 319, -5 0.131 112 160 17 9 1 Scheduled
36 250 2014 Sep 07 02:13-09:35 319, -11 0.127 105 169 18 9 1 Scheduled
37 251 2014 Sep 08 02:37-08:58 318, -18 0.124 92 162 18 9 1
37 252 2014 Sep 09 03:11-08:09 317, -25 0.123 73 136 17 7 1
37 253 2014 Sep 10 04:12-06:53 317, -32 0.124 39 87 14 5 1
2002 CE26 moves too far south for Goldstone to track after Sep. 10.
Goldstone SNRs assume Ptx = 450 kW and Tsys = 17 K.
ARECIBO SNRS
<----PRIMARY-----> <----SECONDARY---->
start date window RA, dec dist runs SNR/day SNR/run SNR/day SNR/run
2014 Aug 24 03:31-04:19 324, +37 0.278 5 19 9 1 0
2014 Aug 25 03:11-04:30 324, +36 0.264 9 34 12 2 1
2014 Aug 26 02:54-04:36 324, +34 0.251 12 52 17 3 1
2014 Aug 27 02:40-04:40 323, +33 0.237 15 77 22 4 1
2014 Aug 28 02:28-04:42 323, +31 0.224 18 110 27 6 1
2014 Aug 29 02:16-04:43 323, +29 0.211 21 140 33 8 2
2014 Aug 30 02:06-04:42 322, +26 0.199 23 190 41 10 2
2014 Aug 31 01:57-04:40 322, +23 0.187 26 250 51 14 3 Scheduled
2014 Sep 01 01:50-04:36 322, +20 0.175 28 320 63 18 3 Scheduled
2014 Sep 02 01:46-04:29 321, +16 0.165 30 420 79 23 4 Scheduled
2014 Sep 03 01:44-04:19 321, +12 0.155 30 520 98 28 5 Scheduled
2014 Sep 04 01:48-04:03 320, +7 0.146 27 600 120 33 7 Scheduled
2014 Sep 05 02:04-03:35 320, +2 0.138 20 530 130 29 7 Scheculed
Arecibo SNRs assume Ptx = 400 kW and Tsys = 25 K.
2014 RC
GOLDSTONE SNRS
Assumptions:
D = 0.015 km, P = 0.1 h, OC albedo = 0.1
<--- Monostatic ---> <-- Bistatic -->
w DOY start date window RA, dec dist runs SNR/day SNR/run SNR/day SNR/RTT
36 247 2014 Sep 04 03:57-10:36 335, -16 0.020 601 5 0 1 0
36 248 2014 Sep 05 03:55-10:31 336, -16 0.014 838 19 1 3 0 Scheduled (Monostatic)
36 249 2014 Sep 06 03:56-10:25 336, -17 0.008 1383 150 4 25 1 Scheduled (Monostatic)
36 250 2014 Sep 07 04:15-10:07 339, -21 0.003 3904 13000 230 2200 38 Scheduled (Bistatic)
36 250 2014 Sep 07 19:07-23:49 144, +2 0.001 20000 5600000 42000 930000 7000 Not scheduled: conflicts with MOM
37 251 2014 Sep 08 14:00-00:38 160, +21 0.006 3184 849 16 141 3
37 252 2014 Sep 09 13:57-00:39 161, +22 0.012 1641 58 2 10 0
37 253 2014 Sep 10 13:53-00:37 161, +23 0.018 1105 12 0 2 0
The rotation period is unknown, so we assumed a fast value of 0.1 h that should
be relatively conservative.
Update: It was way, way off: Goldstone echoes on Sep. 6 suggest a rotation period of about 0.0033 h,
so here are revised estimates:
<--- Monostatic ---> <-- Bistatic -->
start date window RA, dec dist runs SNR/day SNR/run SNR/day SNR/RTT
2014 Sep 04 03:57-10:36 335, -16 0.020 601 1 0 0 0
2014 Sep 05 03:55-10:31 336, -16 0.014 840 4 0 1 0 Scheduled...but no data due to equipment problems
2014 Sep 06 03:56-10:25 336, -17 0.008 1391 28 1 5 0 Scheduled
2014 Sep 07 04:16-10:07 339, -21 0.003 3981 2664 46 440 8 Scheduled
2014 Sep 07 18:46-23:52 144, +2 0.001 20000 942982 7050 160000 1200 Not scheduled due to conflicts with flight projects
2014 Sep 08 14:00-00:38 160, +21 0.006 3139 146 3 24 0.5
ARECIBO SNRS (these assume a rotation period of 0.1 hour, which is much too slow)
start date window RA, dec dist runs SNR/day SNR/run
2014 Sep 08 14:34-17:19 160, +21 0.005 995 8400 280
2014 Sep 09 14:35-17:19 161, +22 0.011 494 420 20
2014 Sep 10 14:33-17:17 161, +23 0.017 308 79 5
2014 Sep 11 14:30-17:14 162, +23 0.023 223 24 2
This object is too far south for Arecibo to track prior to Sep. 8.
Track Assignments
DOY BOA BOT EOT EOA
248 0650 0720 1030 1100 DSS-14 GSSR AST 2002 CE26/2014 RC No data: equipment problems
249 0645 0715 1025 1055 DSS-14 GSSR AST 2002 CE26/2014 RC
250 0630 0700 1010 1040 DSS-14 GSSR AST 2002 CE26/2014 RC
Goldstone tracks:
UT UT PDT Duration Round-trip
DOY Date TX Window TX Window hh:mm time (sec)
248 Sep 5 0720-1030 0020-0330 Sep 5 3:10 137 2002 CE26 Starts 2:40 after the Arecibo track ends
0720-1030 0020-0330 3:10 14 2014 RC
249 Sep 6 0715-1005 0015-0305 Sep 6 2:50 131 2002 CE26
0715-1025 0015-0325 3:10 8 2014 RC
250 Sep 7 0700-0935 0000-0235 Sep 7 2:35 127 2002 CE26
0700-1010 0000-0310 Sep 7 3:10 3 2014 RC Extends 35 minutes later than 2002 CE26
(Previously we also had a 2002 CE26 track on DOY 251 but we released it.)
Radar Speckle Observations: Goldstone transmits, reception with elements of the VLBA:
250 Sep 7 0945-1010 0245-0310 Sep 7 0:25
Start times indicate when we can transmit, which is often less than 90 minutes after we get the telescope.
Arecibo tracks:
2002 CE26
UT UT PDT Duration Round-trip
Date TX Window TX Window hh:mm time (sec)
Aug 31 0157-0440 1857-2140 Aug 30 2:43 187
Sep 1 0150-0436 1850-2136 Aug 31 2:46 175
Sep 2 0146-0429 1846-2129 Sep 1 2:43 165
Sep 3 0144-0419 1844-2119 Sep 2 2:35 155
Sep 4 0148-0403 1848-2103 Sep 3 2:15 146
Sep 5 0204-0335 1904-2035 Sep 4 1:31 138
2014 RC
No observations of 2014 RC are planned at Arecibo due to time needed for maintenance.
Uncertainties
2002 CE26
JPL/Horizons solution 106, # obs: 1026 (2001-2014):
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
2014-Aug-30 00:00 *m 322.44098 26.49369 0.20043399539811 0.546 0.20 0.72 0.000471
2014-Aug-31 00:00 *m 322.07871 23.69924 0.18834431761834 0.579 0.18 0.64 0.000476
2014-Sep-01 00:00 *m 321.69711 20.51316 0.17682035526755 0.617 0.15 0.53 0.000480
2014-Sep-02 00:00 *m 321.29450 16.88040 0.16597702895120 0.659 0.12 0.45 0.000482
2014-Sep-03 00:00 *m 320.86886 12.74575 0.15595252408862 0.706 0.14 0.52 0.000482
2014-Sep-04 00:00 *m 320.41776 8.06063 0.14690971261731 0.760 0.23 0.84 0.000479
2014-Sep-05 00:00 *m 319.93823 2.79413 0.13903436498674 0.820 0.38 1.37 0.000470
2014-Sep-06 00:00 *m 319.42670 -3.05200 0.13252774738361 0.885 0.56 2.04 0.000456
2014-Sep-07 00:00 * 318.87875 -9.42660 0.12759128772024 0.952 0.78 2.82 0.000434
2014-Sep-08 00:00 * 318.28905 -16.21699 0.12440282431851 1.017 1.00 3.62 0.000405
2014-Sep-09 00:00 * 317.65102 -23.24999 0.12308805321009 1.072 1.19 4.34 0.000370
2014-Sep-10 00:00 * 316.95660 -30.31195 0.12369561558894 1.109 1.34 4.86 0.000329
2014-Sep-11 00:00 * 316.19580 -37.18446 0.12618582781580 1.126 1.41 5.13 0.000286
- - - - - - - - - -
JPL/Horizons solution 96, #obs: 974 (2001-2014):
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
2014-Aug-30 00:00 *m 322.44058 26.49374 0.20043513120745 3.267 1.03 3.75 0.002808
2014-Aug-31 00:00 *m 322.07829 23.69931 0.18834546714805 3.466 0.87 3.16 0.002843
2014-Sep-01 00:00 *m 321.69668 20.51325 0.17682151556027 3.688 0.62 2.26 0.002870
2014-Sep-02 00:00 *m 321.29405 16.88051 0.16597819553508 3.937 0.27 0.98 0.002886
2014-Sep-03 00:00 *m 320.86840 12.74589 0.15595369046590 4.219 0.32 1.16 0.002886
2014-Sep-04 00:00 *m 320.41728 8.06082 0.14691086970704 4.537 1.03 3.74 0.002863
2014-Sep-05 00:00 *m 319.93774 2.79437 0.13903550064587 4.894 1.98 7.19 0.002810
2014-Sep-06 00:00 *m 319.42619 -3.05169 0.13252884623735 5.284 3.15 11.43 0.002718
2014-Sep-07 00:00 * 318.87823 -9.42623 0.12759233162044 5.690 4.47 16.25 0.002581
2014-Sep-08 00:00 * 318.28851 -16.21656 0.12440379370240 6.081 5.83 21.19 0.002395
2014-Sep-09 00:00 * 317.65046 -23.24949 0.12308892933382 6.413 7.05 25.61 0.002162
2014-Sep-10 00:00 * 316.95601 -30.31141 0.12369638311127 6.645 7.95 28.88 0.001892
2014-Sep-11 00:00 * 316.19520 -37.18388 0.12618647684843 6.748 8.43 30.63 0.001597
2014 RC
From Jon Giorgini, 2014 Sep 5:
2014 RC has been updated to orbit solution #7 based on 91 optical
measurements Aug 20 - Sep 5. This now includes August pre-discovery
data from Pan-STARRS, lengthening the data arc an additional 10 days.
Nominal radar tracking predicts have been updated on aardvark,
including a geocenter case for the speckle-track (14-99-14).
Formal 3-sigma X-band uncertainties above 15 degrees elevation at
Goldstone, at 1 hour intervals:
Date__(UT)__HR:MN POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
>..... Elevation Cut-off Requested .....<
2014-Sep-05 04:00 0.701 147.06 534.49 0.012708
2014-Sep-05 05:00 0.685 147.05 534.45 0.012532
2014-Sep-05 06:00 0.671 147.04 534.40 0.012357
2014-Sep-05 07:00 0.666 147.03 534.36 0.012184
2014-Sep-05 08:00 0.676 147.02 534.32 0.012013
2014-Sep-05 09:00 0.703 147.00 534.28 0.011843
2014-Sep-05 10:00 0.744 146.99 534.24 0.011675
2014-Sep-05 11:00 0.793 146.98 534.19 0.011509
>..... Elevation Cut-off Requested .....<
2014-Sep-06 04:00 2.949 146.67 533.06 0.009069
2014-Sep-06 05:00 3.117 146.65 532.99 0.008954
2014-Sep-06 06:00 3.292 146.63 532.93 0.008844
2014-Sep-06 07:00 3.479 146.61 532.86 0.008738
2014-Sep-06 08:00 3.687 146.60 532.80 0.008637
2014-Sep-06 09:00 3.922 146.58 532.72 0.008540
2014-Sep-06 10:00 4.188 146.55 532.64 0.008448
>..... Elevation Cut-off Requested .....<
2014-Sep-07 04:00 37.214 144.79 526.23 0.007750
2014-Sep-07 05:00 43.665 144.52 525.26 0.007769
2014-Sep-07 06:00 51.607 144.19 524.05 0.007795
2014-Sep-07 07:00 61.598 143.74 522.42 0.007826
2014-Sep-07 08:00 74.493 143.11 520.12 0.007862
2014-Sep-07 09:00 91.641 142.18 516.75 0.007904
2014-Sep-07 10:00 115.269 140.79 511.69 0.007948
>..... Elevation Cut-off Requested .....<
- - - - - - - - - -
From Jon Giorgini, 2014 Sep. 4:
Based on 39 optical measurements (2014 Sep 1 - 2014 Sep 4) 2014 RC
orbit solution #4 was estimated and nominal predicts established on
aardvark in the /2014rc sub-directory.
Formal 3-sigma X-band uncertainties for s4 when above 15 degrees
elevation angle at DSS-14, 1 hour intervals
Date__(UT)__HR:MN POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
>..... Elevation Cut-off Requested .....<
2014-Sep-05 04:00 5.318 630.21 2290.47 0.039484
2014-Sep-05 05:00 5.595 630.25 2290.60 0.040004
2014-Sep-05 06:00 5.860 630.28 2290.74 0.040539
2014-Sep-05 07:00 6.121 630.32 2290.87 0.041089
2014-Sep-05 08:00 6.389 630.36 2291.00 0.041654
2014-Sep-05 09:00 6.673 630.39 2291.12 0.042233
2014-Sep-05 10:00 6.982 630.42 2291.24 0.042825
2014-Sep-05 11:00 7.322 630.45 2291.34 0.043430
>..... Elevation Cut-off Requested .....<
2014-Sep-06 04:00 30.435 631.10 2293.69 0.055255
2014-Sep-06 05:00 32.569 631.29 2294.39 0.056020
2014-Sep-06 06:00 34.733 631.49 2295.11 0.056792
2014-Sep-06 07:00 36.965 631.68 2295.80 0.057569
2014-Sep-06 08:00 39.314 631.85 2296.44 0.058352
2014-Sep-06 09:00 41.841 632.01 2297.03 0.059141
2014-Sep-06 10:00 44.617 632.16 2297.54 0.059934
>..... Elevation Cut-off Requested .....<
2014-Sep-07 04:00 387.780 625.77 2274.33 0.074824
2014-Sep-07 05:00 454.628 624.94 2271.31 0.075673
2014-Sep-07 06:00 536.767 623.28 2265.27 0.076523
2014-Sep-07 07:00 639.899 619.93 2253.10 0.077372
2014-Sep-07 08:00 772.751 613.52 2229.82 0.078216
2014-Sep-07 09:00 949.165 602.34 2189.17 0.079048
2014-Sep-07 10:00 1191.958 583.83 2121.91 0.079858
>..... Elevation Cut-off Requested .....<
2014-Sep-07 19:00 45251.524 27131.72 98608.99 0.054634
2014-Sep-07 20:00 19186.996 7400.10 26895.31 0.077206
2014-Sep-07 21:00 9787.881 2868.13 10424.10 0.084210
2014-Sep-07 22:00 5849.961 1564.22 5685.09 0.087372
2014-Sep-07 23:00 3877.440 1088.65 3956.63 0.089300
2014-Sep-08 00:00 2752.622 883.24 3210.08 0.090737
>..... Elevation Cut-off Requested .....<
2014-Sep-08 14:00 231.971 625.00 2271.53 0.104192
2014-Sep-08 15:00 216.955 624.98 2271.46 0.105088
2014-Sep-08 16:00 205.670 625.22 2272.33 0.105984
2014-Sep-08 17:00 197.233 625.63 2273.84 0.106881
2014-Sep-08 18:00 190.926 626.16 2275.76 0.107779
2014-Sep-08 19:00 186.177 626.75 2277.89 0.108679
2014-Sep-08 20:00 182.549 627.35 2280.07 0.109580
2014-Sep-08 21:00 179.724 627.92 2282.14 0.110483
2014-Sep-08 22:00 177.487 628.42 2283.97 0.111387
2014-Sep-08 23:00 175.711 628.82 2285.41 0.112293
2014-Sep-09 00:00 174.334 629.08 2286.37 0.113201
- - - - - - - - - -
JPL/Horizons solution 3, # obs: 21 (2 days)
Uncertainties at Goldstone at 00:00 UTC; Uncertainties at hourly intervals around the closest approach are MUCH larger.
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
2014-Sep-03 00:00 *m 335.39568 -15.86503 0.02759043398081 0.595 1478.08 5372.01 0.045264
2014-Sep-04 00:00 *m 335.50731 -16.01158 0.02180518084922 2.309 1478.18 5372.39 0.055189
2014-Sep-05 00:00 *m 335.71373 -16.25306 0.01602895396511 13.294 1479.22 5376.15 0.099034
2014-Sep-06 00:00 *m 336.17238 -16.75294 0.01025715799141 66.899 1481.53 5384.56 0.149522
2014-Sep-07 00:00 * 337.86215 -18.51202 0.00448372628942 594.331 1475.50 5362.65 0.201853
2014-Sep-08 00:00 * 152.68340 13.56985 0.00141713537937 8482.972 2384.01 8664.58 0.250094
2014-Sep-09 00:00 * 160.21858 21.42417 0.00718899300030 199.693 1475.18 5361.47 0.306058
2014-Sep-10 00:00 * 161.08758 22.25108 0.01296575434731 265.734 1490.54 5417.30 0.359431
2014-Sep-11 00:00 * 161.42995 22.55490 0.01874668241958 326.468 1500.22 5452.48 0.413273
**********************************************************************************************
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination:
2002 CE26
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/Illu%
2014-Aug-20 00:00 325.21583 41.53978 0.33809599136864 17.89 8.26 125.8020 /T 98.2/ 26.2
2014-Aug-21 00:00 324.99614 40.69671 0.32354269389283 17.76 8.22 126.8887 /T 106.7/ 18.2
2014-Aug-22 00:00 324.76461 39.75479 0.30909780319015 17.62 8.18 128.0487 /T 114.9/ 11.4
2014-Aug-23 00:00 324.52089 38.70097 0.29477891537493 17.47 8.14 129.2908 /T 122.6/ 6.1
2014-Aug-24 00:00 324.26454 37.51994 0.28060676614950 17.31 8.09 130.6249 /T 129.4/ 2.4
2014-Aug-25 00:00 323.99511 36.19376 0.26660595193197 17.14 8.04 132.0618 /T 134.6/ 0.5
2014-Aug-26 00:00 323.71206 34.70127 0.25280584055615 16.96 7.98 133.6133 /T 137.6/ 0.2
2014-Aug-27 00:00 323.41478 33.01760 0.23924172145580 16.76 7.91 135.2919 /T 137.6/ 1.9
2014-Aug-28 00:00 323.10254 31.11345 0.22595625410067 16.56 7.84 137.1098 /T 134.4/ 5.3
2014-Aug-29 00:00 322.77451 28.95452 0.21300127842227 16.34 7.76 139.0776 /T 128.2/ 10.4
2014-Aug-30 00:00 322.42969 26.50092 0.20044004502837 16.11 7.67 141.2011 /T 119.8/ 17.2
2014-Aug-31 00:00 322.06692 23.70691 0.18834989236160 15.86 7.56 143.4760 /T 109.5/ 25.4
2014-Sep-01 00:00 321.68478 20.52131 0.17682531755166 15.61 7.46 145.8781 /T 97.8/ 34.8
2014-Sep-02 00:00 321.28161 16.88909 0.16598121636728 15.35 7.34 148.3456 /T 84.9/ 45.1
2014-Sep-03 00:00 320.85537 12.75500 0.15595574817208 15.09 7.22 150.7517 /T 70.7/ 56.0
2014-Sep-04 00:00 320.40362 8.07047 0.14691176078054 14.85 7.12 152.8638 /T 55.4/ 66.8
2014-Sep-05 00:00 319.92341 2.80453 0.13903500793473 14.65 7.04 154.3100 /T 39.1/ 77.2
2014-Sep-06 00:00 319.41113 -3.04110 0.13252675443461 14.52 7.03 154.6128 /T 21.8/ 86.3
2014-Sep-07 00:00 318.86239 -9.41534 0.12758845101088 14.50 7.08 153.3695 /T 3.675/ 93.5
2014-Sep-08 00:00 318.27183 -16.20557 0.12439798908034 14.60 7.22 150.4971 /T 14.9/ 98.2
2014-Sep-09 00:00 317.63286 -23.23862 0.12308114603644 14.79 7.42 146.2793 /T 33.5/ 99.9
2014-Sep-10 00:00 316.93741 -30.30089 0.12368665959702 15.06 7.65 141.1849 /T 51.7/ 98.7
2014-Sep-11 00:00 316.17550 -37.17389 0.12617493713433 15.39 7.91 135.6791 /T 68.9/ 94.7
2014-Sep-12 00:00 315.33465 -43.67190 0.13042564427862 15.75 8.16 130.1327 /T 84.6/ 88.3
2014-Sep-13 00:00 314.39913 -49.66657 0.13626071882260 16.12 8.39 124.8008 /T 98.5/ 80.2
2014-Sep-14 00:00 313.34882 -55.09223 0.14347325362809 16.48 8.61 119.8330 /T 109.9/ 70.9
2014-Sep-15 00:00 312.15762 -59.93609 0.15185296287368 16.83 8.80 115.2982 /T 118.5/ 61.0
2014-Sep-16 00:00 310.79108 -64.22180 0.16120347350868 17.16 8.96 111.2103 /T 123.8/ 51.0
2014-Sep-17 00:00 309.20292 -67.99357 0.17135122725552 17.46 9.09 107.5508 /T 125.7/ 41.2
2014-Sep-18 00:00 307.32974 -71.30387 0.18214813794164 17.74 9.21 104.2843 /T 124.6/ 31.9
2014-Sep-19 00:00 305.08280 -74.20541 0.19347053011146 17.99 9.30 101.3692 /T 121.1/ 23.4
2014-Sep-20 00:00 302.33510 -76.74635 0.20521631918376 18.21 9.37 98.7637 /T 116.0/ 15.9
2014 RC
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-O-T /r T-O-M/Illu%
2014-Sep-03 00:00 335.32521 -15.82274 0.02757217058529 19.47 169.5785 /T 74.8/ 56.0
2014-Sep-04 00:00 335.41756 -15.95781 0.02178735286433 18.98 168.6863 /T 61.2/ 66.8
2014-Sep-05 00:00 335.59089 -16.17970 0.01601148226243 18.33 167.7733 /T 47.3/ 77.2
2014-Sep-06 00:00 335.97925 -16.63856 0.01023982572362 17.39 166.8180 /T 33.6/ 86.3
2014-Sep-07 00:00 337.41712 -18.25803 0.00446548182474 15.62 165.5454 /T 21.6/ 93.5
2014-Sep-08 00:00 154.08737 14.45145 0.00143084992742 26. 14.9208 /L 172.5/ 98.2
2014-Sep-09 00:00 160.49942 21.57265 0.00720869026474 28. 17.4587 /L 160.9/ 99.9
2014-Sep-10 00:00 161.24442 22.33240 0.01298561328080 28. 18.5659 /L 150.1/ 98.7
2014-Sep-11 00:00 161.53911 22.61129 0.01876628071200 29. 19.3932 /L 137.3/ 94.7
2014-Sep-12 00:00 161.70319 22.74540 0.02455533596608 29. 20.1441 /L 124.2/ 88.3
2014-Sep-13 00:00 161.81359 22.81438 0.03035608766628 29. 20.8695 /L 111.2/ 80.2
2014-Sep-14 00:00 161.89820 22.84683 0.03617133877511 29. 21.5870 /L 98.6/ 70.9
2014-Sep-15 00:00 161.96964 22.85551 0.04200365480040 30. 22.3036 /L 86.3/ 61.0
Setups
2002 CE26:
Given the diameter and rotation period of the primary, we're expecting
a bandwidth of about 100 Hz.
2014 RC:
We know nothing about the spin state of 2014 RC, but many objects of this size
are rapid rotators, so we're expecting a bandwidth of at least several Hz.
CW setup:
---------------------------------------------------------------------------
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: no hopping
Bandwidth: 4000 Hz
TXoffset +500 Hz
Sampling interval: 2500 x 0.1 usec
FFT for PFS files: 16384 for 0.24 Hz resolution
Ranging setups:
---------------------------------------------------------------------------
10-usec
baud 10 usec
code 127
PRP 1270 usec
FFT 128
ncoh 1
bandwidth 787 Hz
resolution 12.3 Hz
TXOFF +100Hz (echo in bin 32 + 8 = 40)
---------------------------------------------------------------------------
11-usec
baud 11 usec
code 127
PRP 1397 usec
FFT 64
ncoh 1
bandwidth 716 Hz
resolution 11.2 Hz
TXOFF +100 Hz (echo in bin 32 + 9= 41)
-------------------------------------------------------------------------
1-usec
baud 1 usec
code 255
FFT 512
ncoh 16
bandwidth 245 Hz
resolution 0.48 Hz
TXOFF +50 Hz
---------------------------------------------------------------------
Instructions
NOTE: Data should be moved to the appropriate subdirectories in
aardvark:/export/data0/2002ce26/raw/
POINTING:
OSOD and predicts will be on aardvark:
...not available yet...
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
... to be added ...
Transmit offsets are given in millidegrees.
PRDX.OUT.14f-14-14.??
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2002 CE26 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 183-601 | FAX: (818) 393-4445
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/2002CE26/2002CE26_planning.html
Asteroid Radar Astronomy