******************************************************************************* JPL/HORIZONS 37638 (1993 VB) 2024-May-04 13:08:21 Rec #: 37638 (+COV) Soln.date: 2023-Nov-27_04:50:27 # obs: 944 (1993-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459073.5 ! 2020-Aug-12.00 (TDB) Residual RMS= .24519 EC= .5201528349876993 QR= .9161217472355804 TP= 2459001.2857675231 OM= 145.6055302509169 W= 323.1141963687297 IN= 5.081792085037837 A= 1.909194872938545 MA= 26.98059261619119 ADIST= 2.902267998641509 PER= 2.63805 N= .373618769 ANGMOM= .020300263 DAN= .98348 DDN= 2.38481 L= 108.8280003 B= -3.0476431 MOID= .00165262 TP= 2020-May-31.7857675231 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 3.5301 H= 19.28 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#102, PHA OCC=0 radar( 5 delay, 1 Dop.) 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sat May 4 13:08:21 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 37638 (1993 VB) {source: JPL#102} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Feb-19 00:00:00.0000 UT Stop time : A.D. 2023-Mar-03 00:00:00.0000 UT Step-size : 360 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -6378.137 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : ITRF93 {East-longitude positive} Center radii : 6378.137, 6378.137, 6356.752 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441} Rel. light bend : Sun {source: DE441} Rel. lght bnd GM: 1.3271E+11 km^3/s^2 Small-body perts: Yes {source: SB441-N16} Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian EOP file : eop.240503.p240727 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-03. PREDICTS-> 2024-JUL-26 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO ) Table cut-offs 2: Solar elongation ( 0.0,180.0=NO ),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2459073.5 ! 2020-Aug-12.00 (TDB) Residual RMS= .24519 EC= .5201528349876993 QR= .9161217472355804 TP= 2459001.2857675231 OM= 145.6055302509169 W= 323.1141963687297 IN= 5.081792085037837 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.253662472961789E+00 Y=-1.839332311516436E-01 Z= 2.318869038331506E-03 VX=-5.181084436226736E-03 VY=-1.602911750614707E-02 VZ=-5.320321045670087E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 3.5301 H= 19.28 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ********************************************************************************************************************************* Date__(UT)__HR:MN R.A._____(ICRF)_____DEC APmag S-brt delta deldot S-O-T /r T-O-M/MN_Illu% Cnst ********************************************************************************************************************************* $$SOE 2023-Feb-19 00:00 04 00 25.97 +23 22 48.6 15.579 n.a. 0.04709251920774 -4.1183072 93.0019 /T 111.6/ 2.7519 Tau 2023-Feb-19 06:00 04 07 17.70 +24 17 48.3 15.502 n.a. 0.04652079071641 -3.7981427 94.4648 /T 109.5/ 1.8606 Tau 2023-Feb-19 12:00 04 14 25.51 +25 12 54.1 15.426 n.a. 0.04599616970714 -3.4659416 95.9689 /T 107.5/ 1.1534 Tau 2023-Feb-19 18:00 04 21 49.52 +26 07 52.1 15.352 n.a. 0.04552036168520 -3.1221795 97.5118 /T 105.6/ 0.6338 Tau 2023-Feb-20 00:00 04 29 29.72 +27 02 27.5 15.279 n.a. 0.04509499255179 -2.7674839 99.0908 /T 103.7/ 0.3039 Tau 2023-Feb-20 06:00 04 37 25.94 +27 56 24.1 15.209 n.a. 0.04472158639841 -2.4026371 100.7025 /T 101.8/ 0.1645 Tau 2023-Feb-20 12:00 04 45 37.87 +28 49 25.0 15.141 n.a. 0.04440154312469 -2.0285760 102.3433 /T 100.0/ 0.2149 Tau 2023-Feb-20 18:00 04 54 05.01 +29 41 12.8 15.076 n.a. 0.04413611654908 -1.6463852 104.0091 /T 98.2/ 0.4535 Aur 2023-Feb-21 00:00 05 02 46.65 +30 31 29.6 15.014 n.a. 0.04392639374103 -1.2572868 105.6952 /T 96.4/ 0.8772 Aur 2023-Feb-21 06:00 05 11 41.91 +31 19 58.0 14.955 n.a. 0.04377327632876 -0.8626236 107.3970 /T 94.7/ 1.4817 Aur 2023-Feb-21 12:00 05 20 49.64 +32 06 20.6 14.900 n.a. 0.04367746451243 -0.4638384 109.1091 /T 93.0/ 2.2617 Aur 2023-Feb-21 18:00 05 30 08.54 +32 50 21.4 14.847 n.a. 0.04363944444461 -0.0624481 110.8265 /T 91.4/ 3.2108 Aur 2023-Feb-22 00:00 05 39 37.07 +33 31 45.2 14.799 n.a. 0.04365947952051 0.3399842 112.5435 /T 89.8/ 4.3221 Aur 2023-Feb-22 06:00 05 49 13.51 +34 10 18.9 14.754 n.a. 0.04373760596284 0.7418806 114.2548 /T 88.2/ 5.5874 Aur 2023-Feb-22 12:00 05 58 55.99 +34 45 51.2 14.713 n.a. 0.04387363289642 1.1416792 115.9550 /T 86.6/ 6.9984 Aur 2023-Feb-22 18:00 06 08 42.51 +35 18 13.3 14.676 n.a. 0.04406714690321 1.5378645 117.6389 /T 85.1/ 8.5460 Aur 2023-Feb-23 00:00 06 18 30.98 +35 47 18.6 14.643 n.a. 0.04431752084465 1.9289964 119.3014 /T 83.6/ 10.2209 Aur 2023-Feb-23 06:00 06 28 19.26 +36 13 03.3 14.614 n.a. 0.04462392655213 2.3137345 120.9378 /T 82.0/ 12.0135 Aur 2023-Feb-23 12:00 06 38 05.23 +36 35 26.1 14.588 n.a. 0.04498535083178 2.6908594 122.5438 /T 80.5/ 13.9140 Aur 2023-Feb-23 18:00 06 47 46.81 +36 54 28.5 14.566 n.a. 0.04540061411737 3.0592883 124.1155 /T 79.0/ 15.9127 Aur 2023-Feb-24 00:00 06 57 22.00 +37 10 13.9 14.548 n.a. 0.04586839104051 3.4180857 125.6494 /T 77.5/ 18.0000 Aur 2023-Feb-24 06:00 07 06 48.95 +37 22 48.2 14.534 n.a. 0.04638723217011 3.7664690 127.1423 /T 76.0/ 20.1664 Aur 2023-Feb-24 12:00 07 16 05.96 +37 32 19.1 14.523 n.a. 0.04695558620101 4.1038092 128.5919 /T 74.5/ 22.4025 Aur 2023-Feb-24 18:00 07 25 11.53 +37 38 55.6 14.515 n.a. 0.04757182193429 4.4296275 129.9960 /T 73.0/ 24.6993 Aur 2023-Feb-25 00:00 07 34 04.33 +37 42 48.2 14.510 n.a. 0.04823424948268 4.7435879 131.3530 /T 71.5/ 27.0481 Lyn 2023-Feb-25 06:00 07 42 43.29 +37 44 08.0 14.509 n.a. 0.04894114024029 5.0454879 132.6617 /T 70.0/ 29.4406 Lyn 2023-Feb-25 12:00 07 51 07.52 +37 43 07.0 14.510 n.a. 0.04969074526903 5.3352461 133.9215 /T 68.4/ 31.8687 Lyn 2023-Feb-25 18:00 07 59 16.34 +37 39 57.0 14.514 n.a. 0.05048131186436 5.6128889 135.1319 /T 66.9/ 34.3248 Lyn 2023-Feb-26 00:00 08 07 09.27 +37 34 50.2 14.520 n.a. 0.05131109816521 5.8785374 136.2930 /T 65.3/ 36.8017 Lyn 2023-Feb-26 06:00 08 14 46.02 +37 27 58.5 14.529 n.a. 0.05217838576190 6.1323927 137.4050 /T 63.7/ 39.2924 Lyn 2023-Feb-26 12:00 08 22 06.43 +37 19 33.4 14.540 n.a. 0.05308149032931 6.3747233 138.4685 /T 62.1/ 41.7906 Lyn 2023-Feb-26 18:00 08 29 10.52 +37 09 45.8 14.553 n.a. 0.05401877037002 6.6058516 139.4842 /T 60.4/ 44.2899 Lyn 2023-Feb-27 00:00 08 35 58.40 +36 58 46.0 14.567 n.a. 0.05498863419383 6.8261428 140.4533 /T 58.8/ 46.7848 Lyn 2023-Feb-27 06:00 08 42 30.32 +36 46 43.9 14.584 n.a. 0.05598954528772 7.0359941 141.3767 /T 57.1/ 49.2696 Lyn 2023-Feb-27 12:00 08 48 46.58 +36 33 48.3 14.602 n.a. 0.05702002624595 7.2358252 142.2559 /T 55.4/ 51.7392 Lyn 2023-Feb-27 18:00 08 54 47.58 +36 20 07.6 14.621 n.a. 0.05807866143558 7.4260706 143.0923 /T 53.7/ 54.1886 Lyn 2023-Feb-28 00:00 09 00 33.75 +36 05 49.2 14.642 n.a. 0.05916409857079 7.6071720 143.8872 /T 51.9/ 56.6132 Lyn 2023-Feb-28 06:00 09 06 05.56 +35 50 59.9 14.664 n.a. 0.06027504936176 7.7795730 144.6422 /T 50.2/ 59.0086 Lyn 2023-Feb-28 12:00 09 11 23.53 +35 35 45.9 14.688 n.a. 0.06141028939232 7.9437139 145.3589 /T 48.4/ 61.3704 Lyn 2023-Feb-28 18:00 09 16 28.18 +35 20 12.7 14.712 n.a. 0.06256865736719 8.1000279 146.0389 /T 46.6/ 63.6947 Lyn 2023-Mar-01 00:00 09 21 20.04 +35 04 25.1 14.737 n.a. 0.06374905385416 8.2489381 146.6837 /T 44.7/ 65.9776 Lyn 2023-Mar-01 06:00 09 25 59.65 +34 48 27.5 14.763 n.a. 0.06495043963185 8.3908550 147.2949 /T 42.9/ 68.2152 LMi 2023-Mar-01 12:00 09 30 27.54 +34 32 23.6 14.790 n.a. 0.06617183373865 8.5261747 147.8740 /T 41.1/ 70.4039 LMi 2023-Mar-01 18:00 09 34 44.24 +34 16 16.8 14.817 n.a. 0.06741231130438 8.6552778 148.4227 /T 39.2/ 72.5402 LMi 2023-Mar-02 00:00 09 38 50.25 +34 00 10.0 14.845 n.a. 0.06867100123375 8.7785283 148.9422 /T 37.3/ 74.6206 LMi 2023-Mar-02 06:00 09 42 46.09 +33 44 05.6 14.874 n.a. 0.06994708379846 8.8962737 149.4342 /T 35.4/ 76.6416 LMi 2023-Mar-02 12:00 09 46 32.22 +33 28 05.9 14.903 n.a. 0.07123978818526 9.0088441 149.9000 /T 33.5/ 78.6000 LMi 2023-Mar-02 18:00 09 50 09.12 +33 12 12.7 14.933 n.a. 0.07254839003753 9.1165527 150.3409 /T 31.6/ 80.4925 LMi 2023-Mar-03 00:00 09 53 37.23 +32 56 27.5 14.962 n.a. 0.07387220902074 9.2196961 150.7582 /T 29.7/ 82.3159 LMi $$EOE ********************************************************************************************************************************* Column meaning: TIME Times PRIOR to 1962 are UT1, a mean-solar time closely related to the prior but now-deprecated GMT. Times AFTER 1962 are in UTC, the current civil or "wall-clock" time-scale. UTC is kept within 0.9 seconds of UT1 using integer leap-seconds for 1972 and later years. Conversion from the internal Barycentric Dynamical Time (TDB) of solar system dynamics to the non-uniform civil UT time-scale requested for output has not been determined for UTC times after the next July or January 1st. Therefore, the last known leap-second is used as a constant over future intervals. Time tags refer to the UT time-scale conversion from TDB on Earth regardless of observer location within the solar system, although clock rates may differ due to the local gravity field and no analog to "UT" may be defined for that location. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. CALENDAR SYSTEM Mixed calendar mode was active such that calendar dates after AD 1582-Oct-15 (if any) are in the modern Gregorian system. Dates prior to 1582-Oct-5 (if any) are in the Julian calendar system, which is automatically extended for dates prior to its adoption on 45-Jan-1 BC. The Julian calendar is useful for matching historical dates. The Gregorian calendar more accurately corresponds to the Earth's orbital motion and seasons. A "Gregorian-only" calendar mode is available if such physical events are the primary interest. NOTE: "n.a." in output means quantity "not available" at the print-time. 'R.A._____(ICRF)_____DEC' = Astrometric right ascension and declination of the target center with respect to the observing site (coordinate origin) in the reference frame of the planetary ephemeris (ICRF). Compensated for down-leg light-time delay aberration. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'APmag S-brt' = The asteroids' approximate apparent airless visual magnitude and surface brightness using the standard IAU H-G system magnitude model: APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi_1 + G*phi_2) For solar phase angles >90 deg, the error could exceed 1 magnitude. For phase angles >120 degrees, output values are rounded to the nearest integer to indicate error could be large and unknown. For Earth-based observers, the estimated dimming due to atmospheric absorption (extinction) is available as a separate, requestable quantity. Surface brightness is the average airless visual magnitude of a square-arcsecond of the illuminated portion of the apparent disk. It is computed only if the target radius is known. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 'T-O-M/MN_Illu%' = Target-Observer-Moon LUNAR ELONGATION angle and illuminated percentage. The apparent lunar elongation angle between target body center and Moon center, seen from the observing site, along with fraction of the lunar disk illuminated by the Sun. A negative lunar elongation angle indicates the target center is behind the Moon. Units: DEGREES & PERCENT 'Cnst' = Constellation ID; the 3-letter abbreviation for the name of the constellation containing the target centers' astrometric position, as defined by IAU (1930) boundary delineation. See documentation for list of abbreviations. Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA General site: https://ssd.jpl.nasa.gov/ Mailing list: https://ssd.jpl.nasa.gov/email_list.html System news : https://ssd.jpl.nasa.gov/horizons/news.html User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x API https://ssd-api.jpl.nasa.gov/doc/horizons.html command-line telnet ssd.jpl.nasa.gov 6775 e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ********************************************************************************************************************************* !$$SOF COMMAND = '1993 VB' START_TIME = '2023-02-19' STOP_TIME = '2023-03-03' STEP_SIZE = '6 hours' QUANTITIES = '1,9,20,23,25,29'