Goldstone Radar Observations Planning: 1998 FW4, 2002 OA22, & 2002 NV16
This is a planning page for Goldstone radar observations of three near-Earth asteroids scheduled
between September 22-29, 2013. Here are dates when observations are scheduled for each object:
Goldstone Tracks Arecibo First Goldstone expectations
1998 FW4 Sep 22-26 5 Sep 22-27 Goldstone Imaging Goldstone observations start less than 1 h before observations at Arecibo
2002 OA22 Sep 27-29 5 Sep 16-22 Arecibo Imaging
2002 NV16 Sep 28-29 2 Sep 10-12 Arecibo CW and ranging.
This is going to be a hectic set of observations at Goldstone with tracks for three asteroids on seven
consecutive days. On DOY 268 and 269 the times for 2002 OA22 and 1998 FW4 partially overlap.
On DOY 271 and 272 (Sep. 28 and 29), we'll observe two asteroids
on each day at times that are separated by several hours.
1998 FW4 and 2002 OA22 should be strong imaging targets at Arecibo. 2002 NV16 will be much
weaker and probably not strong enough for detailed imaging.
1998 FW4
Goldstone and Arecibo imaging in 2009 revealed the 1998 FW4 is a slowly-rotating, deeply bifurcated object
a few hundred meters long. In 2013 it will be a strong imaging target and we're hopeful that we'll
be able to use the chirp system at resolutions of at least 7.5 meters/row.
The 2009 observations covered very limited amounts of rotation, so this year we
hope to see significantly more of the surface.
The previous observations also showed that this is an optically-dark asteroid, which is consistent with
the Xc spectra class reported by Somers et al. (2010 DPS meeting). Recently Brian Warner has obtained
an extensive series of lightcurves that establish a rotation period of 17.34 hours and a lightcurve
amplitude of about 0.4 magnitudes.
1998 FW4 has a Tisserand parameter of 3.030 that is close to the classical dividing point between
asteroids and comets. This isn't surprising given that it has a relatively large semimajor axis and
aphelion distance.
We hope to conduct bistatic chirp tests with Arecibo during some of the 1998 FW4 tracks. It's possible
that we might also do tests on the Moon during these tracks.
2002 NV16:
2002 NV16 was discovered on July 13, 2002 by LINEAR.
Its absolute magnitude of 21.4 suggests a diameter within a factor of two of 0.17 km.
Otherwise its physical properties are unknown, although there are preliminary indications
from lightcurves obtained by T. Lister and C. Hergenrother that the period may be
about 0.91 hours. The lightcurves have an amplitude of about 0.2 mag suggesting a shape
with low elongation.
This asteroid will approach within 0.0358 AU (14 lunar distances) on September 30, 2013, when it will be
a moderately strong radar target at Goldstone and Arecibo. We requested radar observations
on a couple of days at Goldstone and at Arecibo. Arecibo observations may achieve signal-to-noise ratios
sufficient for coarse-resolution imaging but we do not expect that this object will
be strong enough for high-resolution imaging.
The schedule for 2002 NV16 at Arecibo isn't available yet, but the most likely dates are between Sep. 7-13,
well before the tracks at Goldstone.
Update on Sep. 10: Arecibo got echoes on Sep. 10. The bandwidth is about 6 Hz, so we're expecting a bandwidth
at Goldstone of about 22 Hz.
2002 NV16 will be too close to the Sun for optical observations during a few weeks surrounding
the closest approach. The best time to obtain lightcurves is during June and July, but this
will be challenging because the visual magnitude will be about 19.
2002 OA22
This object was discovered by JPL's NEAT program in July of 2002. It has a rotation period of 10.5 hours,
but otherwise its physical properties are unknown. If our guesses about the SNRs are correct, then this
could be the strongest imaging target of these three asteroids.
Photometry obtained by Etienne Morelle and Raoul Behrend (http://obswww.unige.ch/~behrend/r0w9437a.png) suggests that the rotation
period is about 10.5 hours and that the lightcurve amplitude is about 0.4 magnitudes. This hints that 2002 OA22
has a somewhat elongated shape. The lightcurves do not cover a complete rotation period so it's possible that
the actual period is not 10.5 hours. Arecibo echoes detected on Sep. 11 revealed a bandwidth that is
inconsistent with a 10.5 h period and suggest that 2002 OA22 rotates more rapidly, perhaps in the range
of 2.5 - 7 hours. Lightcurves reported by Brian Warner and Joe Pollock yield a rotation period of 2.6 hours
and a lightcurve amplitude is 0.2 - 0.25 magnitudes.
Based on its absolute magnitude, we're expecting this object to be roughly 400 meters in diameter.
We may also use some of the 2002 OA22 time to conduct bistatic chirp tests with the Moon as a target.
Summary
The table below gives the discovery date, telescope, close approach distance and date, orbital parameters,
and physical properties for each object. All three objects are classified by the Minor Planet Center as
"Potentially Hazardous," although there's no risk from any of them during the entire interval over which
their motion can be computed reliably. 2002 NV16 and 2002 OA22 are also on the NHATS list of potential
human mission targets.
Overlap with Arecibo for possible bistatic lunar tests are listed at the bottom of the page
Orbital and Physical Characteristics
Provisional Designation 1998 FW4 2002 OA22 2002 NV16
Asteroid number 152664 329437 363305
Discoverer LINEAR NEAT LINEAR
Discovery date 1998 Mar 20 2002 Jul 30 2002 July 13
orbit type Apollo Aten Apollo
Close approach dist. 0.045 AU 0.036 AU 0.0358 AU
Close approach dist. 17.5 LD 14.0 LD 13.9 LD LD = lunar distance (384,400 km)
Close approach date Sep 24 Oct 02 Sep 30
semimajor axis 2.507 AU 0.936 AU 1.238 AU
eccentricity 0.726 0.243 0.220
inclination 3.5 deg 6.9 deg 3.5 deg
perihelion distance 0.686 AU 0.709 AU 0.965 AU
aphelion distance 4.327 AU 1.163 AU 1.510 AU
Tisserand parameter 3.030 6.375 5.152
absolute magnitude (H) 19.6 19.3 21.4
diameter 0.38 km 0.44 km 0.17 km
optical albedo dark ? ?
rotation period 17.34 2.6 ? 0.91 h (T. Lister, C. Hergenrother, pers. comm.)
pole direction ? ? ?
lightcurve amplitude 0.4 mag 0.25 mag 0.2 mag
spectral class Xc ?
PHA PHA PHA
NHATS NHATS
Pointing uncertainties for all of these objects are already small enough to conduct the radar observations.
Last update: 2013 October 1
FUTURE CLOSE APPROACHES
1998 FW4
Date (CT) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p
A.D. 2013 Sep 24.76448 Earth .044998 .044997 .044998 20.010 0.03 4.18E5 .000000
A.D. 2025 Sep 29.79112 Earth .025754 .025754 .025755 18.606 0.07 4.88E5 .000000
A.D. 2029 Sep 30.01602 Earth .026145 .026145 .026145 18.585 0.03 1.12E6 .000000
A.D. 2033 Oct 11.53538 Earth .073315 .073314 .073315 15.262 0.13 3.53E5 .000000
A.D. 2094 Oct 08.91529 Earth .028357 .028356 .028358 16.659 0.43 9.10E5 .000000
A.D. 2111 Mar 02.26738 Venus .074842 .074830 .074854 9.849 6.68 1.29E5 .000000
A.D. 2139 Jun 08.01772 Venus .080632 .080577 .080687 13.386 14.93 8.11E5 .000000
A.D. 2182 Sep 29.12414 Earth .033688 .033660 .033717 18.947 6.09 9.67E5 .000000
2002 OA22
Date (CT) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p
A.D. 2013 Oct 02.52847 Earth .035746 .035746 .035746 7.341 0.10 4.72E5 .000000
A.D. 2025 Oct 30.39654 Venus .050068 .050065 .050071 6.961 0.98 1.63E6 .000000
A.D. 2032 Oct 02.04633 Earth .035713 .035711 .035714 7.162 1.20 4.97E5 .000000
A.D. 2041 Mar 18.81011 Venus .048067 .048058 .048077 7.551 8.73 1.37E6 .000000
A.D. 2051 Oct 01.51210 Earth .043803 .043646 .043961 6.611 32.71 5.75E5 .000000
A.D. 2056 Aug 07.99608 Venus .098734 .098163 .099305 10.844 33.63 8.40E5 .000000
A.D. 2073 Oct 23.67554 Venus .055712 .055379 .056052 6.406 68.66 1.91E6 .000000
A.D. 2080 Oct 03.02171 Earth .070890 .070247 .071533 8.801 7.56 4.33E5 .000000
A.D. 2089 Mar 16.04229 Venus .077119 .076407 .077832 9.787 56.15 9.49E5 .000000
A.D. 2099 Oct 02.81080 Earth .038089 .038088 .038090 7.025 2.23 5.52E5 .000000
A.D. 2106 May 17.18023 Venus .096756 .096428 .097085 5.170 189.61 7.75E5 .000000
A.D. 2118 Sep 25.23018 Earth .081304 .080537 .082079 5.822 315.03 9.96E5 .000000
A.D. 2121 Oct 20.52533 Venus .047363 .047347 .047579 7.131 126.31 1.52E6 .000000
A.D. 2147 Oct 04.78693 Earth .046945 .045186 .048840 7.846 67.45 4.84E5 .000000
A.D. 2154 May 24.53113 Venus .075835 .072363 .079443 5.498 779.18 1.92E6 .000000
A.D. 2166 Oct 04.62911 Earth .064933 .061634 .068293 8.532 7.86 4.64E5 .000000
A.D. 2183 May 01.28635 Venus .061843 .061021 .062675 9.039 95.71 1.40E6 .000000
A.D. 2194 Sep 28.28181 Earth .068254 .066768 .069781 6.009 487.09 8.83E5 .000000
A.D. 2198 Sep 13.72803 Venus .046076 .045430 .047040 7.016 376.94 1.50E6 .000000
2002 NV16
Date (CT) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p
A.D. 2013 Sep 30.98286 Earth .035808 .035808 .035808 4.274 0.94 4.29E5 .000000
A.D. 2024 Oct 24.65790 Earth .030209 .030208 .030210 4.873 1.00 2.64E5 .000000
A.D. 2053 Aug 09.94643 Earth .053165 .053151 .053179 5.595 5.81 5.05E5 .000000
A.D. 2064 Sep 05.07702 Earth .038239 .038239 .038239 4.320 6.45 5.92E5 .000000
A.D. 2075 Oct 06.23520 Earth .034488 .034488 .034488 4.303 1.76 3.98E5 .000000
A.D. 2086 Oct 22.09975 Earth .029378 .029378 .029379 4.708 1.47 2.18E5 .000000
A.D. 2126 Aug 17.81296 Earth .038681 .038674 .038688 4.892 10.17 5.37E5 .000000
A.D. 2137 Aug 29.86145 Earth .036096 .036092 .036099 4.410 46.82 5.65E5 .000000
A.D. 2148 Sep 01.17515 Earth .036608 .036603 .036614 4.375 180.34 5.79E5 .000000
A.D. 2159 Aug 27.35655 Earth .035868 .035788 .035958 4.479 498.55 5.58E5 .000000
A.D. 2170 Aug 10.44292 Earth .052734 .050447 .055101 5.586 963.57 5.57E5 .000000
A.D. 2196 Nov 09.65875 Earth .096467 .094601 .098327 7.237 251.24 2.15E5 .000000
1998 FW4 http://www.minorplanetcenter.net/mpec/J98/J98F18.html 2002 NV16 http://www.minorplanetcenter.net/mpec/K02/K02N39.html 2002 OA22 http://www.minorplanetcenter.net/mpec/K02/K02O48.html
GOLDSTONE SNRS
1998 FW4
D = 0.35 km, P = 12.0 h, OC albedo = 0.100
SNR/ SNR/
w DOY start date window RA, dec dist runs day run
38 262 2013 Sep 19 04:53-14:55 30, +13 0.076 234 39 3
38 263 2013 Sep 20 05:02-15:22 35, +16 0.067 273 65 4
38 264 2013 Sep 21 05:15-15:59 42, +20 0.059 320 110 7
38 265 2013 Sep 22 05:37-16:48 52, +24 0.052 376 180 10 Scheduled
39 266 2013 Sep 23 06:10-17:52 65, +28 0.047 430 280 15 Scheduled
39 267 2013 Sep 24 06:59-19:05 81, +32 0.045 463 340 17 Scheduled
39 268 2013 Sep 25 08:01-20:13 99, +33 0.046 458 310 16 Scheduled
39 269 2013 Sep 26 09:06-21:06 116, +32 0.050 419 230 12 Scheduled
39 270 2013 Sep 27 10:02-21:42 128, +29 0.056 366 140 8
39 271 2013 Sep 28 10:45-22:06 137, +27 0.064 315 84 5
39 272 2013 Sep 29 11:17-22:21 144, +24 0.073 271 50 3
2002 OA22
D = 0.44 km, P = 2.6 h, OC albedo = 0.1
SNR/ SNR/
w DOY start date window RA, dec dist runs date run
38 260 2013 Sep 19 05:26-14:31 31, +4 0.067 245 41 3
38 261 2013 Sep 20 05:31-14:25 32, +2 0.063 253 51 3
38 264 2013 Sep 21 05:37-14:18 33, 0 0.060 262 63 4
38 265 2013 Sep 22 05:45-14:10 34, -3 0.056 269 78 5
39 266 2013 Sep 23 05:55-14:01 35, -5 0.053 276 96 6
39 267 2013 Sep 24 06:07-13:51 37, -9 0.050 279 120 8
39 268 2013 Sep 25 06:22-13:39 38, -12 0.047 279 140 9 Scheduled
39 269 2013 Sep 26 06:42-13:24 40, -16 0.044 272 170 11 Scheduled
39 270 2013 Sep 27 07:08-13:05 42, -20 0.042 255 190 13 Scheduled
39 271 2013 Sep 28 07:43-12:38 44, -25 0.040 222 200 14 Scheduled
39 272 2013 Sep 29 08:39-11:55 47, -31 0.038 154 180 15 Scheduled
After Sep. 29 2002 OA 22 moves too far south for Goldstone to track.
2002 NV16
D = 0.17 km
Period = 2.2 h A lower bound based on observations of other NEAs in this size range
OC albedo = 0.1 A standard guess; generally conservative
If the period = 0.91 hours, then, all else being equal, the SNR/run below are
almost a factor of two too high.
SNR/ SNR/
w DOY start date window RA, dec dist runs date run
38 265 2013 Sep 22 17:12-01:27 205, -3 0.042 297 57 4
39 266 2013 Sep 23 16:58-01:10 202, -4 0.040 303 64 4
39 267 2013 Sep 24 16:43-00:52 199, -4 0.039 308 71 4
39 268 2013 Sep 25 16:28-00:33 195, -5 0.038 313 78 5
39 269 2013 Sep 26 16:11-00:14 192, -5 0.037 316 85 5
39 270 2013 Sep 27 15:55-23:54 188, -5 0.037 319 90 6
39 271 2013 Sep 28 15:37-23:33 185, -6 0.036 321 95 6 Scheduled
39 272 2013 Sep 29 15:19-23:12 181, -6 0.036 321 97 6 Scheduled
40 273 2013 Sep 30 15:01-22:52 177, -7 0.036 320 98 6
40 274 2013 Oct 01 14:43-22:31 173, -7 0.036 318 97 6
40 275 2013 Oct 02 14:25-22:11 169, -7 0.036 315 95 6
40 276 2013 Oct 03 14:07-21:51 165, -8 0.036 311 90 6
40 277 2013 Oct 04 13:49-21:31 162, -8 0.037 306 84 5
40 278 2013 Oct 05 13:31-21:13 158, -8 0.038 300 78 5
40 279 2013 Oct 06 13:15-20:55 155, -8 0.039 294 71 5
41 280 2013 Oct 07 12:58-20:38 152, -8 0.040 287 64 4
41 281 2013 Oct 08 12:43-20:22 149, -8 0.041 280 57 4
Goldstone SNRs assume Ptx = 450 kW
- - - - - - - - - - -
ARECIBO SNRS
1998 FW4
# SNR/ SNR/
start date window RA, dec dist runs Date run
2013 Sep 18 05:04-07:34 25, +10 0.088 50 280 42
2013 Sep 19 05:11-07:49 29, +13 0.078 59 470 64
2013 Sep 20 05:24-08:09 34, +15 0.069 70 790 99
2013 Sep 21 05:45-08:35 41, +19 0.060 76 1300 150
2013 Sep 22 06:19-09:07 50, +23 0.053 91 2200 240
2013 Sep 23 07:11-09:48 63, +28 0.048 93 3100 340
2013 Sep 24 08:21-10:38 79, +31 0.045 85 3500 410
2013 Sep 25 09:35-11:40 97, +33 0.046 77 3100 400
2013 Sep 26 10:34-12:46 113, +32 0.049 75 2400 310
2013 Sep 27 11:15-13:41 127, +30 0.055 76 1700 210
2013 Sep 28 11:45-14:21 136, +27 0.063 72 1100 130
2013 Sep 29 12:06-14:49 143, +25 0.071 66 670 87
2013 Sep 30 12:21-15:07 149, +22 0.081 60 420 56
2002 OA22
# SNR/ SNR/
start date window RA, dec dist runs Date run
2013 Sep 10 05:31-08:13 26, +15 0.104 45 98 15
2013 Sep 11 05:30-08:10 26, +14 0.100 47 120 18
2013 Sep 12 05:29-08:07 27, +13 0.096 49 140 20
2013 Sep 13 05:29-08:04 27, +12 0.092 50 160 24
2013 Sep 14 05:29-08:01 28, +11 0.087 51 190 28
2013 Sep 15 05:29-07:57 28, +10 0.083 52 230 33
2013 Sep 16 05:31-07:53 29, +9 0.079 53 270 40
2013 Sep 17 05:33-07:48 30, +8 0.075 53 320 47
2013 Sep 18 05:36-07:42 30, +6 0.071 52 380 57
2013 Sep 19 05:42-07:35 31, +4 0.067 49 430 68
2013 Sep 20 05:51-07:25 32, +2 0.064 43 450 77
2013 Sep 21 06:06-07:09 33, 0 0.060 30 400 78
2002 NV16
# SNR/ SNR/
start date window RA, dec dist runs Date run
2013 Sep 01 20:30-21:58 233, 2 0.083 29 30 6
2013 Sep 02 20:25-21:51 232, 2 0.081 29 33 7
2013 Sep 03 20:20-21:44 232, 2 0.078 29 36 7
2013 Sep 04 20:14-21:37 231, 1 0.076 29 39 8
2013 Sep 05 20:09-21:29 231, 1 0.074 29 43 9
2013 Sep 06 20:04-21:21 230, 1 0.072 29 47 9
2013 Sep 07 19:58-21:13 229, 1 0.070 28 50 10
2013 Sep 08 19:52-21:05 228, 1 0.068 28 55 11
2013 Sep 09 19:46-20:56 227, 1 0.066 28 61 12
2013 Sep 10 19:40-20:46 226, 0 0.064 27 66 14
2013 Sep 11 19:34-20:36 225, 0 0.062 26 71 15
2013 Sep 12 19:28-20:25 224, 0 0.060 25 77 16
2013 Sep 13 19:22-20:14 223, 0 0.058 23 81 18
2013 Sep 14 19:16-20:01 222, -1 0.056 21 86 19
2013 Sep 15 19:10-19:47 220, -1 0.054 18 88 21
2013 Sep 16 19:05-19:31 219, -1 0.052 13 83 23
Arecibo SNRs assume Ptx = 900 kW and Tsys = 23 K.
1998 FW4 2002 OA22 2002 NV16
SNR/run SNR/run SNR/run
265 0410 0540 0845 0915 DSS-14 GSSR AST 1998 FW4 10
266 0740 0910 1215 1245 DSS-14 GSSR AST 1998 FW4 15
267 0530 0700 0915 0945 DSS-14 GSSR AST 1998 FW4 17
268 0455 0625 1255 1325 DSS-14 GSSR 2002OA22/1998FW4 17 19 This might shorten to 0635-0805
269 0515 0645 1300 1330 DSS-14 GSSR 2002OA22/1998FW4 16 22
270 0625 0755 1305 1335 DSS-14 GSSR AST 2002 OA22 26
271 0625 0755 1235 1305 DSS-14 GSSR AST 2002 OA22 28
271 1830 2000 2200 2230 DSS-14 GSSR AST 2002 NV16 6
272 0745 0915 1155 1225 DSS-14 GSSR AST 2002 OA22 30
272 1635 1805 2005 2035 DSS-14 GSSR AST 2002 NV16 6
UT UT PDT Duration Round-trip SNR/
Target DOY Date TX Window TX Window hh:mm time (sec) Run
1998 FW4 265 Sep 22 0535-0845 2235-0145 Sep 21-22 3:10 52 10
1998 FW4 266 Sep 23 0740-1215 0110-0515 Sep 23 4:35 47 15
1998 FW4 267 Sep 24 0700-0915 0000-0215 Sep 24 2:15 45 17 Very short track
2002 OA22 268 Sep 25 0625-1255 2325-0555 Sep 24-25 6:30 47 9 2.5 rotations
1998 FW4 268 Sep 25 0805-1255 0105-0555 Sep 25 4:50 46 16 Enters the beam partway through the track
2002 OA22 269 Sep 26 0650-1300 2350-0600 Sep 25-26 6:10 44 11 2.4 rotations
1998 FW4 269 Sep 26 0910-1300 0210-0600 Sep 26 3:50 50 12 Enters the beam partway through the track
2002 OA22 270 Sep 27 0715-1305 0015-0605 Sep 27 5:50 42 13 2.2 rotations
2002 OA22 271 Sep 28 0755-1235 0055-0535 Sep 28 4:40 40 14 1.8 rotations
2002 NV16 271 Sep 28 1900-2200 1200-1500 Sep 28 3:00 36 6 Note the gap between the OA22 and NV16 tracks
2002 OA22 272 Sep 29 0840-1155 0140-0455 Sep 29 3:15 38 15 1.25 rotations
2002 NV16 272 Sep 29 1805-2005 1105-1305 Sep 29 2:00 36 6 Note the gap between the OA22 and NV16 tracks
Arecibo tracks:
UT UT PDT Duration Round-trip SNR/
Target DOY Date TX Window TX Window hh:mm time (sec) Run
2002 OA22 259 Sep 16 0531-0753 2231-0053 Sep 15-16 1:22 79 40 Cancelled due to equipment problems
2002 OA22 260 Sep 17 0533-0748 2233-0048 Sep 16-17 2:15 75 47 Cancelled due to equipment problems
2002 OA22 261 Sep 18 0536-0742 2236-0042 Sep 17-18 2:06 71 57 Cancelled due to equipment problems
2002 OA22 262 Sep 19 0542-0735 2242-0035 Sep 18-19 1:53 67 68 0.72 rotations
2002 OA22 263 Sep 20 0551-0725 2251-0025 Sep 19-20 1:34 64 77 0.60 rotations
2002 OA22 264 Sep 21 0606-0709 2306-0009 Sep 20-21 1:03 60 78 0.40 rotations
Goldstone/Arecibo overlap
1998 FW4 265 Sep 22 0619-0907 2319-0207 Sep 21-22 2:48 53 240 0619 - 0845
1998 FW4 266 Sep 23 0711-0948 0011-0248 Sep 23 2:47 48 340 0810 - 0948
1998 FW4 267 Sep 24 0821-1038 0121-0338 Sep 24 2:17 45 410 0821 - 0915
1998 FW4 268 Sep 25 0935-1140 0235-0440 Sep 25 2:05 46 400 0935 - 1140
1998 FW4 269 Sep 26 1034-1246 0334-0546 Sep 26 2:12 49 310 1034 - 1246
1998 FW4 270 Sep 27 1115-1341 0415-0641 Sep 27 1:26 55 210 None
1998 FW4
From Jon Giorgini, 2013 Sep 16:
Using the existing 367 optical measurements (1994-Mar-9 to 2013-Sep-15)
and 6 delays and 2 Dopplers from 2009 (DSS14), 152664 (1998 FW4) orbit
solution #64 was estimated. OSOD with nominal predicts was established on
aardvark in the /a152664 sub-directory.
Formal 3-sigma X-band uncertainties for s64:
Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig
2013-Sep-21 00:00 0.631 2.31 0.000049
2013-Sep-22 00:00 0.697 2.92 0.000072
2013-Sep-23 00:00 0.730 3.40 0.000101
2013-Sep-24 00:00 0.697 3.41 0.000134
2013-Sep-25 00:00 0.589 2.71 0.000163
2013-Sep-26 00:00 0.460 1.66 0.000183
2013-Sep-27 00:00 0.377 0.84 0.000193
= = = = = = = = = = = = = = = = = = = =
2002 OA22
From Jon Giorini, 2013 Sep 26:
Syncing Arecibo's delay measurement from Sep 19 with the current
DSS-14 dataset (2 delays) and new optical (685 measurements,
2002-Jul-30 to 2013-Sep-25), 329437 (2002 OA22) orbit solution
#131 was estimated.
Files on aardvark have been updated in the /a329437 sub-directory.
Prior solution files were moved to the ./OLD sub-directory
Formal 3-sigma X-band uncertainties:
Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig
2013-Sep-25 00:00 0.410 0.15 0.000005
2013-Sep-26 00:00 0.440 0.17 0.000006
2013-Sep-27 00:00 0.471 0.20 0.000008
2013-Sep-28 00:00 0.502 0.24 0.000010
2013-Sep-29 00:00 0.531 0.27 0.000012
2013-Sep-30 00:00 0.557 0.30 0.000014
2013-Oct-01 00:00 0.577 0.33 0.000017
Some single night biases from individual sites were deweighted,
so the radar data should fit more easily now.
Current radar residuals:
Measurements Resids std.err
2013 926.291667 70000 44.43918961 -14 Delay -1.245 3.000
2013 925.291667 70000 47.13832405 -14 Delay -0.148 3.000
2013 919.284722 65000 67.32650923 -1 Delay 0.044 0.500
- - - - - - - - - -
From Jon Giorgini, 2013 Sep 24:
Based on 679 optical measurements 2002-Jul-30 to 2013-Sep-22,
329437 (2002 OA22) orbit solution #127 was estimated.
OSOD with nominal predicts has been established on aardvark
in the /a329437 sub-directory.
Formal 3-sigma X-band uncertainties for s127:
Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig
2013-Sep-25 00:00 0.629 0.77 0.000102
2013-Sep-26 00:00 0.681 0.89 0.000099
2013-Sep-27 00:00 0.737 1.02 0.000096
2013-Sep-28 00:00 0.793 1.16 0.000094
2013-Sep-29 00:00 0.846 1.30 0.000091
2013-Sep-30 00:00 0.894 1.43 0.000089
2013-Oct-01 00:00 0.930 1.53 0.000087
= = = = = = = = = = = = = = = = = = = =
2002 NV16
From Horizons, 2013 Aug 06, Solution 58, # obs: 351 (2002-2013):
Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
2013-Sep-15 00:00 *m 221.23551 -0.53300 0.05525638468419 1.550 0.36 1.30 0.000373
2013-Sep-16 00:00 *m 219.70745 -0.80395 0.05329733035732 1.651 0.40 1.45 0.000362
2013-Sep-17 00:00 * 218.03485 -1.09201 0.05138694918249 1.759 0.45 1.62 0.000350
2013-Sep-18 00:00 * 216.20538 -1.39837 0.04953420079585 1.874 0.50 1.81 0.000337
2013-Sep-19 00:00 * 214.20680 -1.72405 0.04774885342077 1.996 0.55 2.01 0.000322
2013-Sep-20 00:00 * 212.02738 -2.06976 0.04604146376412 2.124 0.61 2.22 0.000306
2013-Sep-21 00:00 * 209.65650 -2.43579 0.04442333376786 2.256 0.67 2.45 0.000289
2013-Sep-22 00:00 * 207.08546 -2.82175 0.04290643363352 2.391 0.74 2.68 0.000271
2013-Sep-23 00:00 * 204.30837 -3.22642 0.04150327327228 2.526 0.80 2.92 0.000253
2013-Sep-24 00:00 * 201.32332 -3.64753 0.04022669959401 2.657 0.87 3.16 0.000234
2013-Sep-25 00:00 * 198.13360 -4.08157 0.03908959805930 2.780 0.93 3.38 0.000216
2013-Sep-26 00:00 * 194.74886 -4.52377 0.03810448562690 2.890 0.98 3.58 0.000200
2013-Sep-27 00:00 * 191.18611 -4.96806 0.03728299908276 2.983 1.03 3.74 0.000188
2013-Sep-28 00:00 * 187.47020 -5.40736 0.03663530635569 3.052 1.06 3.86 0.000182
2013-Sep-29 00:00 * 183.63360 -5.83394 0.03616949479165 3.093 1.08 3.91 0.000182
2013-Sep-30 00:00 * 179.71529 -6.23997 0.03589101243791 3.105 1.07 3.90 0.000190
**********************************************************************************************
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination:
1998 FW4
Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r T-O-M/Illu%
2013-Sep-02 00:00 * 5.96731 -1.29097 0.27694924386160 18.30 154.2992 /L 113.7/ 12.1
2013-Sep-04 00:00 *m 6.88499 -0.76686 0.25186134819560 18.04 155.1909 /L 136.8/ 2.6
2013-Sep-06 00:00 *m 7.94730 -0.14360 0.22721170786524 17.77 155.9187 /L 160.2/ 0.4
2013-Sep-08 00:00 *m 9.20860 0.61377 0.20300638113083 17.49 156.4207 /L 171.1/ 6.8
2013-Sep-10 00:00 *m 10.75038 1.55699 0.17926114027205 17.18 156.6035 /L 147.9/ 21.5
2013-Sep-12 00:00 *m 12.69991 2.76550 0.15601039246892 16.86 156.3206 /L 122.6/ 42.3
2013-Sep-14 00:00 *m 15.26641 4.36666 0.13332520888160 16.51 155.3309 /L 97.2/ 65.1
2013-Sep-16 00:00 *m 18.81622 6.57393 0.11135156820440 16.15 153.2164 /L 72.4/ 85.0
2013-Sep-18 00:00 * 24.04161 9.75810 0.09039737101640 15.78 149.2109 /L 49.6/ 97.3
2013-Sep-20 00:00 * 32.36273 14.54918 0.07114551096170 15.42 141.8472 /L 30.9/ 99.6
2013-Sep-22 00:00 * 46.81253 21.69881 0.05517924904404 15.20 128.4462 /L 20.0/ 92.5
2013-Sep-24 00:00 * 72.30089 29.96072 0.04586514930535 15.41 106.1776 /L 21.1/ 78.8
2013-Sep-26 00:00 * 105.88996 32.52535 0.04720437679092 16.45 79.4852 /L 27.4/ 61.3
2013-Sep-28 00:00 * 131.24526 28.42426 0.05844807761754 18.02 59.2978 /L 27.2/ 42.6
2013-Sep-30 00:00 * 145.62397 23.65489 0.07531781787559 n.a. 47.5038 /L 19.8/ 24.8
2002 OA22
Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r T-O-M/Illu%
2013-Sep-02 00:00 * 21.78579 18.65896 0.14195993664079 16.97 131.7960 /L 93.0/ 12.1
2013-Sep-04 00:00 *m 22.61028 17.96776 0.13269636117276 16.78 133.3563 /L 116.6/ 2.6
2013-Sep-06 00:00 *m 23.46200 17.12332 0.12355750189163 16.59 134.9609 /L 141.2/ 0.4
2013-Sep-08 00:00 *m 24.35089 16.09566 0.11455946391632 16.38 136.6056 /L 166.7/ 6.8
2013-Sep-10 00:00 *m 25.29032 14.84657 0.10572028176003 16.16 138.2804 /L 166.0/ 21.5
2013-Sep-12 00:00 *m 26.29807 13.32658 0.09706065865905 15.92 139.9648 /L 138.8/ 42.3
2013-Sep-14 00:00 *m 27.39772 11.47060 0.08860553267273 15.68 141.6203 /L 110.8/ 65.1
2013-Sep-16 00:00 *m 28.62063 9.19159 0.08038697955429 15.42 143.1767 /L 82.5/ 85.0
2013-Sep-18 00:00 * 30.00905 6.37181 0.07244910532132 15.16 144.5090 /L 54.6/ 97.3
2013-Sep-20 00:00 * 31.62142 2.85142 0.06485571114952 14.88 145.3991 /L 28.5/ 99.6
2013-Sep-22 00:00 * 33.54183 -1.58409 0.05770150320651 14.62 145.4844 /L 14.1/ 92.5
2013-Sep-24 00:00 * 35.89678 -7.21063 0.05112756363236 14.38 144.2181 /L 30.2/ 78.8
2013-Sep-26 00:00 * 38.88529 -14.34542 0.04534064209369 14.20 140.9122 /L 51.9/ 61.3
2013-Sep-28 00:00 * 42.83546 -23.24955 0.04062925640046 14.12 134.9428 /L 72.3/ 42.6
2013-Sep-30 00:00 * 48.31436 -33.88033 0.03735203129674 14.16 126.1071 /L 88.9/ 24.8
2002 NV16
Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r T-O-M/Illu%
2013-Sep-01 00:00 232.98205 2.07608 0.08449685223014 19.75 72.7027 /T 121.7/ 18.5
2013-Sep-03 00:00 232.02045 1.80183 0.08032995527999 19.79 69.9851 /T 98.5/ 6.3
2013-Sep-05 00:00 230.89509 1.50401 0.07612284034455 19.85 67.0993 /T 74.0/ 0.4
2013-Sep-07 00:00 229.57045 1.17881 0.07189356682875 19.92 64.0098 /T 48.8/ 2.5
2013-Sep-09 00:00 228.00282 0.82157 0.06766410827272 20.03 60.6730 /T 24.9/ 13.2
2013-Sep-11 00:00 226.13841 0.42652 0.06346195780916 20.17 57.0352 /T 19.8/ 31.2
2013-Sep-13 00:00 223.91172 -0.01346 0.05932207278536 n.a. 53.0312 /T 43.5/ 53.4
2013-Sep-15 00:00 221.24476 -0.50696 0.05528891816787 n.a. 48.5838 /T 72.9/ 75.3
2013-Sep-17 00:00 218.04806 -1.06368 0.05141829725679 n.a. 43.6047 /T 103.8/ 92.0
2013-Sep-19 00:00 214.22481 -1.69320 0.04777855955648 n.a. 38.0001 /T 135.0/ 99.6
2013-Sep-21 00:00 209.68021 -2.40227 0.04445081879683 n.a. 31.6816 /T 164.5/ 97.1
2013-Sep-23 00:00 204.33858 -3.19023 0.04152782871863 n.a. 24.5885 /T 159.4/ 86.3
2013-Sep-25 00:00 198.17079 -4.04296 0.03911040922111 n.a. 16.7351 /T 130.2/ 70.2
2013-Sep-27 00:00 191.23010 -4.92765 0.03729921746578 n.a. 8.3889 /T 100.1/ 51.7
2013-Sep-29 00:00 183.68323 -5.79270 0.03618036647589 n.a. 3.8546 /L 69.6/ 33.1
2013-Oct-01 00:00 175.81208 -6.57736 0.03580726777211 n.a. 11.8259 /L 38.6/ 16.6
2013-Oct-03 00:00 167.96715 -7.22969 0.03618614896773 n.a. 21.1659 /L 9.776/ 4.7
2013-Oct-05 00:00 160.48561 -7.72280 0.03727361001728 n.a. 30.2719 /L 28.9/ 0.0
2013-Oct-07 00:00 153.61725 -8.05910 0.03898811618859 n.a. 38.7976 /L 61.7/ 4.7
2013-Oct-09 00:00 147.49447 -8.26202 0.04122872398059 n.a. 46.5932 /L 94.6/ 18.6
2013-Oct-11 00:00 142.14615 -8.36362 0.04389195145185 n.a. 53.6259 /L 126.3/ 39.2
2013-Oct-13 00:00 137.53170 -8.39514 0.04688213663112 19.35 59.9346 /L 153.8/ 61.9
2013-Oct-15 00:00 133.57397 -8.38236 0.05011575970488 19.11 65.5948 /L 156.6/ 82.0
2013-Oct-17 00:00 130.18240 -8.34440 0.05352219333677 18.94 70.6951 /L 132.2/ 95.4
2013-Oct-19 00:00 127.26655 -8.29419 0.05704300362795 18.83 75.3240 /L 105.0/100.0
2013-Oct-21 00:00 124.74282 -8.23962 0.06063094656353 18.75 79.5631 /L 78.7/ 95.8
2013-Oct-23 00:00 122.53746 -8.18468 0.06424894268759 18.70 83.4842 /L 54.2/ 84.5
2013-Oct-25 00:00 120.58730 -8.13058 0.06786893649036 18.66 87.1491 /L 33.2/ 68.5
2013-Oct-27 00:00 118.83926 -8.07669 0.07147065817116 18.64 90.6095 /L 23.0/ 50.0
2013-Oct-29 00:00 117.24924 -8.02115 0.07504048463293 18.62 93.9083 /L 34.7/ 31.2
2013-Oct-31 00:00 115.78086 -7.96130 0.07857057622625 18.61 97.0808 /L 56.7/ 14.4
We're going to start with the following setup, which should produce an echo relatively quickly,
and then we'll do ranging measurements. Then we'll decide what to do next based on
the SNRs.
CW setup:
---------------------------------------------------------------------------
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: 2
Dwell 20 seconds
Bandwidth: 4000 Hz
Sampling interval: 1250 x 0.1 usec
FFT for PFS files: 4096 for 0.98 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)
-------------------------------------------------------------------------
_____________________________________________________________________
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 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 NV16 GOLDSTONE MASTERLOG
==============================================================================
Receive TX
Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes
------------------------------------------------------------------------------
Times for possible Goldstone-Arecibo lunar bistatic chirp tests
| DSS-14 Arecibo | Goldstone track
Date DOY BOA BOT EOT EOA | Moonrise/set Moonrise/set Overlap | Overlap
Sep 22 265 0410 0540 0845 0915 DSS-14 GSSR AST 1998 FW4 | 0452-1506 0509-0752 0509-0752 | 0509-0752 Whole Arecibo view period
Sep 23 266 0740 0910 1215 1245 DSS-14 GSSR AST 1998 FW4 | 0533-1603 0555-0844 0555-0844 | 0740-0844 Part of Arecibo view period
Sep 24 267 0530 0700 0915 0945 DSS-14 GSSR AST 1998 FW4 | 0616-1657 0643-0934 0643-0934 | 0643-0915 Most of Arecibo view period
Sep 25 268 0455 0625 1255 1325 DSS-14 GSSR 2002OA22/1998FW4 | 0702-1748 0732-1023 0732-1023 | 0732-1023 Whole Arecibo view period
Sep 26 269 0515 0645 1300 1330 DSS-14 GSSR 2002OA22/1998FW4 | 0750-1835 0820-1112 0820-1112 | 0820-1112 Whole Arecibo view period
Sep 27 270 0625 0755 1305 1335 DSS-14 GSSR AST 2002 OA22 | 0840-1920 0908-1159 0908-1159 | 0908-1159 Whole Arecibo view period
Sep 28 271 0625 0755 1235 1305 DSS-14 GSSR AST 2002 OA22 | 0931-2001 0955-1245 0955-1245 | 0955-1235 Most of Arecibo view period
Sep 28 271 1830 2000 2200 2230 DSS-14 GSSR AST 2002 NV16 | 0931-2001 0955-1245 0955-1245 | None
Sep 29 272 0745 0915 1155 1225 DSS-14 GSSR AST 2002 OA22 | 1024-2040 1043-1329 1043-1329 | 1043-1155 Part of Arecibo view period
Sep 29 272 1635 1805 2005 2035 DSS-14 GSSR AST 2002 NV16 | 1024-2040 1043-1329 1043-1329 | None
Goldstone horizons = 20 deg
Arecibo horizons = 70.3 deg
Dr. Lance A. M. Benner | PHONE: (818) 354-7412
Mail Stop 183-610 | 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/2002NV16/2002NV16_planning.html
Asteroid Radar Astronomy