2013 BV15 Goldstone Radar Observations Planning
Sequence (08:29-10:00 UT)) of radar images from 2013 February 12. Resolution = 3.75 m x 1.0 Hz. The entire sequence spans 90 minutes and shows about three rotations by the asteroid. 2013 BV15 is clearly an irregular, elongated (preliminary estimate of the size is 60 x 30 m) object with at least one distinct concavity.
2013 BV15 was discovered by Pan-STARRS on January 17, 2013. The absolute magnitude of 24.3 suggests a diameter within a factor of two of 45 meters. Lightcurves obtained by Carl Hergenrother (Univ. of Arizona) indicate a rotation period of 0.48 h and an amplitude of 0.7 mag, suggestive of an elongated shape. The other physical properties of this object are unknown. 2013 BV15 will approach within 0.0095 AU (3.7 lunar distances) on Feb. 13. We're going to observe it during time already scheduled for Camillo on Feb. 11 and 12 when the SNRs should be sufficient to get a detection and while the asteroid is still far enough north for Goldstone to track. After February 12, 2013 BV15 will move too far south for Goldstone. This asteroid should be a pretty strong target at Goldstone and we're cautiously optimistic that we'll be able to obtain images, possibly with a resolution as fine as 3.75 meters.
Orbital and Physical Characteristics orbit type Apollo semimajor axis 1.504 AU eccentricity 0.387 inclination 0.51 deg perihelion distance 0.922 AU aphelion distance 2.086 AU absolute magnitude (H) 24.3 diameter ~44 meters (+-a factor of two) rotation period 0.48 h C. Hergenrother, pers. comm. pole direction unknown lightcurve amplitude 0.7 mag C. Hergenrother, pers. comm. spectral class unknown Last update: 2013 February 19
M.P.E.C. 2013-B28 Issued 2013 Jan. 18, 21:50 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
2013 BV15
Observations:
K13B15V* C2013 01 17.48093 08 11 00.978+16 10 22.93 20.5 wLEB028F51
K13B15V C2013 01 17.49626 08 11 00.897+16 10 15.31 20.9 wLEB028F51
K13B15V C2013 01 17.51161 08 11 00.822+16 10 07.57 20.4 wLEB028F51
K13B15V C2013 01 17.52699 08 11 00.768+16 09 59.65 20.9 wLEB028F51
K13B15V KC2013 01 18.24035408 11 17.95 +16 03 56.3 19.7 VqEB028H21
K13B15V KC2013 01 18.24945208 11 17.91 +16 03 51.7 19.9 VqEB028H21
K13B15V KC2013 01 18.25855008 11 17.94 +16 03 46.7 20.1 VqEB028H21
K13B15V KC2013 01 18.26764808 11 17.92 +16 03 42.5 20.5 VqEB028H21
K13B15V KC2013 01 18.44668 08 11 19.17 +16 02 16.9 20.2 RoEB028291
K13B15V KC2013 01 18.48726 08 11 19.43 +16 01 53.2 20.1 RoEB028291
K13B15V KC2013 01 18.50416 08 11 19.59 +16 01 43.5 19.6 RoEB028291
Observer details:
291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD.
F51 Pan-STARRS 1, Haleakala. Observers N. Primak, A. Schultz, S. Watters,
T. Goggia. Measurer PS1 Science Consortium. 1.8-m Ritchey-Chretien
+ CCD.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers T. Vorobjov, L. Buzzi, S. Foglia. 0.76-m f/3.0 astrograph + CCD.
Orbital elements:
2013 BV15 Earth MOID = 0.0049 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5 MPC
M 271.55599 (2000.0) P Q
n 0.52213257 Peri. 11.86933 -0.99141800 +0.13072811
a 1.5273862 Node 175.64215 -0.12070313 -0.91325104
e 0.4051396 Incl. 0.54198 -0.05021065 -0.38585320
P 1.89 H 24.1 G 0.15 U 9
Residuals in seconds of arc
130117 F51 0.1- 0.0 130118 H21 0.1+ 0.3+ 130118 291 0.2- 0.0
130117 F51 0.0 0.0 130118 H21 0.3- 0.2+ 130118 291 0.1+ 0.2-
130117 F51 0.0 0.0 130118 H21 0.3+ 0.4- 130118 291 0.0 0.2+
130117 F51 0.1+ 0.0 130118 H21 0.2+ 0.0
Ephemeris:
2013 BV15 a,e,i = 1.53, 0.41, 1 q = 0.9086
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2012 12 19 07 58 11.0 +18 39 08 0.3506 1.2979 149.4 22.7 23.5
...
2013 01 03 08 06 24.7 +17 33 39 0.2312 1.2057 162.4 14.3 22.1
...
2013 01 11 08 09 05.6 +16 53 09 0.1764 1.1573 169.5 8.9 21.3
...
2013 01 17 08 10 52.2 +16 14 11 0.1388 1.1220 174.2 5.1 20.5
2013 01 18 08 11 12.4 +16 06 21 0.1329 1.1162 174.8 4.6 20.4
2013 01 19 08 11 34.2 +15 57 58 0.1269 1.1105 175.2 4.2 20.2
...
2013 01 25 08 14 43.2 +14 50 26 0.09271 1.0768 174.5 5.0 19.5
...
2013 02 02 08 26 25.5 +11 19 09 0.04988 1.0346 169.7 9.8 18.3
...
2013 02 17 19 03 52.9 -30 13 50 0.02953 0.9675 44.9 133.8 22.5
A. U. Tomatic (C) Copyright 2013 MPC M.P.E.C. 2013-B28
2013 BV15: D = 0.04 km, P = 0.5000 hr, OC albedo = 0.100
Goldstone: G = 0.94 K/Jy, Tsys = 18.0 K, P = 435 kW, elev >= 20.00 deg, unhopped
t_down = 4 s, t_switch = 4 s
# max
start date window RA, dec dist runs SNR SNR/run
---------------------------------------------------------------------
2013 Feb 7 02:48-12:03 132, +5 0.030 567 11 1
2013 Feb 8 02:59-12:00 134, +3 0.025 644 21 1
2013 Feb 9 03:18-11:58 138, -1 0.021 738 42 2
2013 Feb 10 03:49-11:55 143, -6 0.017 845 92 4
2013 Feb 11 04:48-11:49 151, -15 0.013 929 210 8
2013 Feb 12 07:03-11:17 166, -28 0.010 806 350 14
Arecibo SNRs
2013BV15: D = 0.04 km, P = 0.5000 hr, OC albedo = 0.100
Arecibo : G = 10.00 K/Jy, Tsys = 25.0 K, P = 900 kW, elev >= 70.30 deg, unhopped
t_down = 0 s, t_switch = 0 s
# max
start date window RA, dec dist runs SNR SNR/run
---------------------------------------------------------------------
2013 Feb 02 02:47-05:20 127, +12 0.054 85 18 2
2013 Feb 03 02:47-05:18 127, +11 0.049 92 26 3
2013 Feb 04 02:48-05:15 128, +10 0.045 100 38 4
2013 Feb 05 02:50-05:13 129, +9 0.040 109 59 6
2013 Feb 06 02:55-05:10 130, +8 0.035 115 94 9
2013 Feb 07 03:03-05:07 132, +6 0.031 123 150 15
2013 Feb 08 03:17-05:02 134, +3 0.026 119 250 26
2013 Feb 09 03:50-04:45 137, 0 0.022 78 300 36
Arecibo is offline so observations there have not been scheduled.
Goldstone tracks:
UT UT PDT Duration RTT SNR/
DOY Date TX Window TX Window hh:mm (sec) Run
--- ---- --------- --------- --------- ----- ----
42 Feb 11 0725-1000 2325-0200 Feb 10-11 2:35 13 8
43 Feb 12 0705-1115 2305-0315 Feb 11-12 4:10 10 14
These times overlap parts of the schedule for 3752 Camillo and 2013 BS45.
From Jon Giorgini, Feb 11 2013, Based on 121 optical (2013-Jan-17 to 2013-Feb-10) and the 2 delay and Dopplers from last night, 2013 BV15 orbit solution #21 was estimated. Formal 3-sigma X-band uncertainties: Date__(UT)__HR:MN POS_3sigma DOP_X_3sig RT_delay_3sig 2013-Feb-12 06:00 3.440 3.31 0.000026 2013-Feb-12 08:00 3.615 3.68 0.000027 2013-Feb-12 10:00 3.790 4.15 0.000028 2013-Feb-12 12:00 3.963 4.73 0.000030 JPL/Horizons solution 10: JPL/HORIZONS (2013 BV15) 2013-Feb-08 12:10:39 Rec #:750610 (+COV) Soln.date: 2013-Feb-08_00:52:42 # obs: 88 (22 days) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2013-Feb-10 00:00 *m 140.68113 -4.10256 0.01832879693504 4.929 253.48 921.27 0.042583 2013-Feb-11 00:00 *m 147.45478 -11.34035 0.01448650410539 10.332 223.61 812.69 0.033871 2013-Feb-12 00:00 *m 159.32288 -22.68309 0.01136056721608 21.652 164.13 596.51 0.026716 2013-Feb-13 00:00 *m 181.77656 -37.70115 0.00965968175707 38.196 56.72 206.14 0.022607 2013-Feb-14 00:00 *m 217.34727 -47.19395 0.01012072075896 44.370 87.14 316.71 0.023220 2013-Feb-15 00:00 *m 247.89511 -45.61390 0.01250204610176 37.334 182.23 662.30 0.028257 2013-Feb-16 00:00 *m 264.72513 -40.83012 0.01596441092776 29.537 231.63 841.86 0.035890 2013-Feb-17 00:00 *m 273.85477 -36.74622 0.01995301219621 24.327 256.37 931.78 0.044812 2013-Feb-18 00:00 *m 279.33631 -33.70283 0.02421084459433 21.056 269.75 980.39 0.054396 2013-Feb-19 00:00 *m 282.94539 -31.44158 0.02862055918395 18.943 277.67 1009.17 0.064354 2013-Feb-20 00:00 *m 285.49595 -29.72199 0.03312458572236 17.513 282.76 1027.68 0.074541 2013-Feb-21 00:00 *m 287.39911 -28.37894 0.03769238815961 16.500 286.28 1040.48 0.084880 2013-Feb-22 00:00 *m 288.88156 -27.30366 0.04230663277776 15.752 288.87 1049.90 0.095329 2013-Feb-23 00:00 *m 290.07752 -26.42375 0.04695689240357 15.180 290.88 1057.19 0.105861 2013-Feb-24 00:00 *m 291.07120 -25.68989 0.05163655370858 14.730 292.50 1063.09 0.116457 2013-Feb-25 00:00 * 291.91797 -25.06758 0.05634119090717 14.367 293.86 1068.01 0.127107 More astrometry would be very helpful. ********************************************************************************************** Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta APmag S-O-T /r T-O-M/Illu% 2013-Feb-05 00:00 128.63092 9.15608 0.04074500693007 18.13 168.1071 /T 115.9/ 34.2 2013-Feb-06 00:00 129.83209 7.83440 0.03606554261582 17.87 167.6218 /T 128.6/ 23.7 2013-Feb-07 00:00 131.38393 6.12560 0.03145115834787 17.59 167.0508 /T 140.9/ 14.6 2013-Feb-08 00:00 133.45476 3.83948 0.02692237462420 17.27 166.1948 /T 152.2/ 7.3 2013-Feb-09 00:00 136.33759 0.64980 0.02251729193910 16.93 164.5990 /T 161.1/ 2.5 2013-Feb-10 00:00 140.58429 -4.02958 0.01831103285566 16.59 161.3030 /T 164.8/ 0.3 2013-Feb-11 00:00 147.33727 -11.25991 0.01446297344255 16.28 154.4935 /L 161.9/ 0.8 2013-Feb-12 00:00 159.18615 -22.61587 0.01132874622538 16.12 141.2474 /L 155.2/ 3.8 2013-Feb-13 00:00 181.66861 -37.70101 0.00961958907391 16.38 119.1726 /L 145.2/ 9.0 2013-Feb-14 00:00 217.39918 -47.24201 0.01007944691919 17.32 93.5147 /L 133.8/ 15.8 2013-Feb-15 00:00 248.04161 -45.62274 0.01246582755640 18.65 74.2956 /L 128.2/ 23.8 2013-Feb-16 00:00 264.86170 -40.80944 0.01593353703664 19.87 62.7948 /L 129.2/ 32.7 2013-Feb-17 00:00 273.96683 -36.71606 0.01992604661681 20.84 56.1057 /L 134.2/ 42.0 2013-Feb-18 00:00 279.42838 -33.67135 0.02418654746882 21.58 52.1034 /L 141.4/ 51.5 2013-Feb-19 00:00 283.02263 -31.41150 0.02859807711331 22.15 49.6476 /L 149.7/ 60.8 2013-Feb-20 00:00 285.56210 -29.69407 0.03310334588937 22.59 48.1332 /L 158.6/ 69.8 2013-Feb-21 00:00 287.45677 -28.35328 0.03767199911054 22.94 47.2232 /L 166.9/ 78.0
With a rotation period of ~0.5 hours, we're expecting a bandwidth in the realm of 10 Hz.
We're going to start with the CW setup below, which has a relatively wide bandwidth due
to the Doppler uncertainties in the current orbital solution.
This setup should resolve the echo in frequency and enable us to see an echo quickly.
Due to the very short round-trip time, we will NOT hop the transmitter.
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: no hops
Bandwidth: 8000 Hz
Sampling interval: 2500 x 0.1 usec
VME FFT for PSD files: 8192 for 0.98-Hz resolution
TX offset : +500 Hz
Ranging setups:
---------------------------------------------------------------------------
10-usec
baud 10 usec
code 127
PRP 1270 usec
FFT 128
ncoh 1
bandwidth 787 Hz
resolution 6.15 Hz
TXOFF +100Hz (echo in bin 64+16=80)
---------------------------------------------------------------------------
11-usec
baud 11 usec
code 127
PRP 1397 usec
FFT 128
ncoh 1
bandwidth 716 Hz
resolution 5.6 Hz
TXOFF +100 Hz (echo in bin 64+18=82)
-------------------------------------------------------------------------
1-usec
baud 1 usec
code 255
FFT 256
ncoh 6
bandwidth 653.6 Hz
resolution 2.55 Hz
TXOFF +50 Hz -> echo would be centered at 128 + 20 = 148
-------------------------------------------------------------------------
0.125-usec imaging
baud 0.125 usec
code 511
FFT 1024
ncoh 150
bandwidth 104.4 Hz
resolution 0.1 Hz
TXOFF +10 Hz -> echo would be centered at 512 + 98 = 610
_____________________________________________________________________
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
WFG:
/export/data3/osod/ops/2013bv15/PRDX.OUT.14v-14-14.s21
/PUNCH.OUT.14v-14-14.s21
/EPH.OUT.s21
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2013 02 12 043 060000 163.8429 -26.4475 A 10.7 s21
2013 02 12 043 070000 164.6008 -27.0854 A -2.20 -1.90 10.6
2013 02 12 043 080000 165.3725 -27.7255 AB 10.5
2013 02 12 043 090000 166.1614 -28.3660 B -2.30 -1.90 10.4
2013 02 12 043 100000 166.9712 -29.0058 BC 10.3
2013 02 12 043 110000 167.8057 -29.6438 C -2.40 -1.90 10.3
2013 02 12 043 120000 168.6689 -30.2794 C 10.2
Transmit offsets are given in millidegrees.
PRDX.OUT.14f-14-14.s21
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2013 FEB 12 06:00 10.6966989311 229475.909 311.7231 -26.4475 163.843 13.144
2013 FEB 12 06:10 10.6806730071 227792.701 314.1045 -26.5536 163.968 14.370
2013 FEB 12 06:20 10.6647659800 226083.563 316.4855 -26.6598 164.094 15.547
2013 FEB 12 06:30 10.6489796298 224349.556 318.8663 -26.7661 164.220 16.674
2013 FEB 12 06:40 10.6333156621 222591.777 321.2466 -26.8725 164.347 17.749
2013 FEB 12 06:50 10.6177757035 220811.352 323.6267 -26.9789 164.474 18.768
2013 FEB 12 07:00 10.6023613015 219009.437 326.0063 -27.0854 164.601 19.730
2013 FEB 12 07:10 10.5870739206 217187.213 328.3856 -27.1920 164.728 20.632
2013 FEB 12 07:20 10.5719149399 215345.888 330.7645 -27.2986 164.856 21.471
2013 FEB 12 07:30 10.5568856624 213486.690 333.1429 -27.4053 164.985 22.246
2013 FEB 12 07:40 10.5419872896 211610.869 335.5209 -27.5120 165.114 22.954
2013 FEB 12 07:50 10.5272209429 209719.692 337.8985 -27.6187 165.243 23.593
2013 FEB 12 08:00 10.5125876593 207814.439 340.2756 -27.7255 165.373 24.162
2013 FEB 12 08:10 10.4980883779 205896.405 342.6523 -27.8322 165.503 24.657
2013 FEB 12 08:20 10.4837239482 203966.896 345.0284 -27.9390 165.633 25.079
2013 FEB 12 08:30 10.4694951230 202027.224 347.4041 -28.0458 165.765 25.425
2013 FEB 12 08:40 10.4554025772 200078.706 349.7792 -28.1525 165.896 25.694
2013 FEB 12 08:50 10.4414468821 198122.666 352.1538 -28.2593 166.029 25.886
2013 FEB 12 09:00 10.4276285168 196160.423 354.5278 -28.3660 166.161 26.000
2013 FEB 12 09:10 10.4139478710 194193.299 356.9012 -28.4728 166.295 26.035
2013 FEB 12 09:20 10.4004052380 192222.610 359.2740 -28.5794 166.429 25.991
2013 FEB 12 09:30 10.3870008279 190249.664 1.6463 -28.6861 166.563 25.869
2013 FEB 12 09:40 10.3737347505 188275.762 4.0179 -28.7927 166.699 25.670
2013 FEB 12 09:50 10.3606070237 186302.193 6.3888 -28.8993 166.835 25.393
2013 FEB 12 10:00 10.3476175799 184330.233 8.7591 -29.0058 166.971 25.041
2013 FEB 12 10:10 10.3347662682 182361.140 11.1287 -29.1123 167.108 24.615
2013 FEB 12 10:20 10.3220528379 180396.156 13.4975 -29.2187 167.246 24.116
2013 FEB 12 10:30 10.3094769627 178436.502 15.8657 -29.3251 167.385 23.546
2013 FEB 12 10:40 10.2970382215 176483.377 18.2331 -29.4314 167.525 22.907
2013 FEB 12 10:50 10.2847361195 174537.955 20.5998 -29.5377 167.665 22.201
2013 FEB 12 11:00 10.2725700755 172601.384 22.9656 -29.6438 167.806 21.431
2013 FEB 12 11:10 10.2605394305 170674.783 25.3307 -29.7499 167.947 20.598
2013 FEB 12 11:20 10.2486434432 168759.240 27.6950 -29.8560 168.090 19.706
2013 FEB 12 11:30 10.2368813087 166855.813 30.0584 -29.9619 168.233 18.756
2013 FEB 12 11:40 10.2252521377 164965.524 32.4210 -30.0678 168.378 17.750
2013 FEB 12 11:50 10.2137549715 163089.361 34.7827 -30.1736 168.523 16.693
2013 FEB 12 12:00 10.2023887913 161228.273 37.1435 -30.2794 168.669 15.585
2013 BV15 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/2013BV15/2013BV15_planning.html
Asteroid Radar Astronomy