1986-03-25, 2days

Object Data Page

Results

******************************************************************************* Ephemeris / WWW_USER Fri Aug 23 07:49:31 2019 Pasadena, USA / Horizons ******************************************************************************* Target body name: 162173 Ryugu (1999 JU3) {source: JPL#120} Center body name: Earth (399) {source: DE431} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1986-Mar-25 00:00:00.0000 UT Stop time : A.D. 1986-Mar-27 00:00:00.0000 UT Step-size : 60 minutes ******************************************************************************* Target pole/equ : No model available Target radii : (unavailable) Center geodetic : 0.00000000,0.00000000,0.0000000 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.00000000,0.00000000,0.0000000 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : High-precision EOP model {East-longitude positive} Center radii : 6378.1 x 6378.1 x 6356.8 km {Equator, meridian, pole} Target primary : Sun Vis. interferer : MOON (R_eq= 1737.400) km {source: DE431} Rel. light bend : Sun, EARTH {source: DE431} Rel. lght bnd GM: 1.3271E+11, 3.9860E+05 km^3/s^2 Small-body perts: Yes {source: SB431-N16} Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL EOP file : eop.190822.p191113 EOP coverage : DATA-BASED 1962-JAN-20 TO 2019-AUG-22. PREDICTS-> 2019-NOV-12 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= 2455907.5 ! 2011-Dec-12.00 (TDB) Residual RMS= .30546 EC= .1902257533711703 QR= .9633081094119196 TP= 2455902.2563366606 OM= 251.6197109778495 W= 211.4258497031505 IN= 5.883742390778817 Equivalent ICRF heliocentric equatorial cartesian coordinates (au, au/d): X=-3.110574563985249E-01 Y= 8.593388225070249E-01 Z= 3.071612761016043E-01 VX=-1.808963327297997E-02 VY=-4.829575481927901E-03 VZ=-3.811446171459336E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 7.627 H= 19.3 G= .150 B-V= n.a. ALBEDO= n.a. STYP= Cg Asteroid non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au): AMRAT= 0. A1= 0. A2= -3.371880211489E-14 A3= 0. Non-standard or simulated/proxy model: ALN= 1. NK= 0. NM= 2. NN= 5.093 R0= 1. ******************************************************************************************************* Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC APmag delta deldot S-O-T /r S-T-O ******************************************************************************************************* $$SOE 1986-Mar-25 00:00 14 10 53.04 -45 48 51.1 17.76 0.20168227712129 -0.0417593 129.1553 /L 42.9276 1986-Mar-25 01:00 14 10 48.90 -45 48 05.9 17.76 0.20168129812608 -0.0396081 129.2038 /L 42.8855 1986-Mar-25 02:00 14 10 44.74 -45 47 20.6 17.76 0.20168037101975 -0.0374465 129.2524 /L 42.8434 1986-Mar-25 03:00 14 10 40.58 -45 46 35.1 17.76 0.20167949605070 -0.0352747 129.3009 /L 42.8013 1986-Mar-25 04:00 14 10 36.41 -45 45 49.6 17.76 0.20167867346764 -0.0330925 129.3495 /L 42.7592 1986-Mar-25 05:00 14 10 32.24 -45 45 04.0 17.76 0.20167790351954 -0.0308999 129.3981 /L 42.7170 1986-Mar-25 06:00 14 10 28.07 -45 44 18.2 17.76 0.20167718645563 -0.0286970 129.4467 /L 42.6748 1986-Mar-25 07:00 14 10 23.88 -45 43 32.3 17.76 0.20167652252545 -0.0264837 129.4953 /L 42.6327 1986-Mar-25 08:00 14 10 19.69 -45 42 46.4 17.75 0.20167591197879 -0.0242600 129.5440 /L 42.5905 1986-Mar-25 09:00 14 10 15.50 -45 42 00.3 17.75 0.20167535506581 -0.0220260 129.5927 /L 42.5483 1986-Mar-25 10:00 14 10 11.30 -45 41 14.1 17.75 0.20167485203689 -0.0197815 129.6414 /L 42.5060 1986-Mar-25 11:00 14 10 07.09 -45 40 27.8 17.75 0.20167440314269 -0.0175266 129.6901 /L 42.4638 1986-Mar-25 12:00 14 10 02.88 -45 39 41.3 17.75 0.20167400863425 -0.0152612 129.7388 /L 42.4215 1986-Mar-25 13:00 14 09 58.66 -45 38 54.8 17.75 0.20167366876283 -0.0129854 129.7876 /L 42.3792 1986-Mar-25 14:00 14 09 54.44 -45 38 08.1 17.75 0.20167338378011 -0.0106991 129.8364 /L 42.3369 1986-Mar-25 15:00 14 09 50.21 -45 37 21.4 17.75 0.20167315393795 -0.0084024 129.8852 /L 42.2946 1986-Mar-25 16:00 14 09 45.98 -45 36 34.5 17.75 0.20167297948864 -0.0060952 129.9340 /L 42.2522 1986-Mar-25 17:00 14 09 41.74 -45 35 47.5 17.75 0.20167286068474 -0.0037774 129.9829 /L 42.2099 1986-Mar-25 18:00 14 09 37.49 -45 35 00.4 17.75 0.20167279777914 -0.0014492 130.0318 /L 42.1675 1986-Mar-25 19:00 14 09 33.24 -45 34 13.2 17.74 0.20167279102507 0.0008896 130.0807 /L 42.1251 1986-Mar-25 20:00 14 09 28.98 -45 33 25.9 17.74 0.20167284067605 0.0032389 130.1296 /L 42.0827 1986-Mar-25 21:00 14 09 24.72 -45 32 38.4 17.74 0.20167294698600 0.0055988 130.1785 /L 42.0403 1986-Mar-25 22:00 14 09 20.46 -45 31 50.9 17.74 0.20167311020917 0.0079692 130.2275 /L 41.9978 1986-Mar-25 23:00 14 09 16.18 -45 31 03.2 17.74 0.20167333060010 0.0103503 130.2765 /L 41.9554 1986-Mar-26 00:00 14 09 11.91 -45 30 15.5 17.74 0.20167360841377 0.0127419 130.3255 /L 41.9129 1986-Mar-26 01:00 14 09 07.62 -45 29 27.6 17.74 0.20167394390542 0.0151442 130.3745 /L 41.8704 1986-Mar-26 02:00 14 09 03.33 -45 28 39.6 17.74 0.20167433733071 0.0175570 130.4236 /L 41.8279 1986-Mar-26 03:00 14 08 59.04 -45 27 51.5 17.74 0.20167478894563 0.0199806 130.4727 /L 41.7853 1986-Mar-26 04:00 14 08 54.74 -45 27 03.2 17.74 0.20167529900654 0.0224148 130.5218 /L 41.7428 1986-Mar-26 05:00 14 08 50.43 -45 26 14.9 17.73 0.20167586777021 0.0248596 130.5709 /L 41.7002 1986-Mar-26 06:00 14 08 46.12 -45 25 26.4 17.73 0.20167649549368 0.0273152 130.6200 /L 41.6577 1986-Mar-26 07:00 14 08 41.81 -45 24 37.9 17.73 0.20167718243450 0.0297815 130.6692 /L 41.6151 1986-Mar-26 08:00 14 08 37.49 -45 23 49.2 17.73 0.20167792885050 0.0322585 130.7184 /L 41.5724 1986-Mar-26 09:00 14 08 33.16 -45 23 00.4 17.73 0.20167873499994 0.0347462 130.7676 /L 41.5298 1986-Mar-26 10:00 14 08 28.83 -45 22 11.5 17.73 0.20167960114144 0.0372447 130.8168 /L 41.4872 1986-Mar-26 11:00 14 08 24.49 -45 21 22.5 17.73 0.20168052753403 0.0397539 130.8660 /L 41.4445 1986-Mar-26 12:00 14 08 20.15 -45 20 33.4 17.73 0.20168151443714 0.0422740 130.9153 /L 41.4018 1986-Mar-26 13:00 14 08 15.80 -45 19 44.1 17.73 0.20168256211056 0.0448049 130.9646 /L 41.3591 1986-Mar-26 14:00 14 08 11.45 -45 18 54.8 17.73 0.20168367081455 0.0473465 131.0139 /L 41.3164 1986-Mar-26 15:00 14 08 07.10 -45 18 05.3 17.73 0.20168484080971 0.0498990 131.0632 /L 41.2737 1986-Mar-26 16:00 14 08 02.73 -45 17 15.7 17.72 0.20168607235708 0.0524624 131.1126 /L 41.2309 1986-Mar-26 17:00 14 07 58.37 -45 16 26.0 17.72 0.20168736571811 0.0550367 131.1619 /L 41.1882 1986-Mar-26 18:00 14 07 53.99 -45 15 36.2 17.72 0.20168872115465 0.0576218 131.2113 /L 41.1454 1986-Mar-26 19:00 14 07 49.62 -45 14 46.3 17.72 0.20169013892901 0.0602178 131.2607 /L 41.1026 1986-Mar-26 20:00 14 07 45.23 -45 13 56.2 17.72 0.20169161930385 0.0628248 131.3102 /L 41.0598 1986-Mar-26 21:00 14 07 40.84 -45 13 06.1 17.72 0.20169316254235 0.0654427 131.3596 /L 41.0169 1986-Mar-26 22:00 14 07 36.45 -45 12 15.8 17.72 0.20169476890803 0.0680716 131.4091 /L 40.9741 1986-Mar-26 23:00 14 07 32.05 -45 11 25.4 17.72 0.20169643866489 0.0707115 131.4586 /L 40.9312 1986-Mar-27 00:00 14 07 27.65 -45 10 34.9 17.72 0.20169817207738 0.0733623 131.5081 /L 40.8884 $$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 by introduction of integer leap-seconds for 1972 and later. Conversion from the internal Barycentric Dynamical Time (TDB) 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 on Earth regardless of where the observer is located in the solar system. For example, if an observation from the surface of another body has an output time-tag of 12:31:00 UT, it refers to a time-scale conversion from TDB to UT valid at the center of the Earth at that instant, not the observer's location elsewhere in the solar system, where clock rates may differ slightly due to the local gravity field and there is no precisely defined or adopted "UT" analog. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. Calendar dates prior to 1582-Oct-15 are in the Julian calendar system. Later calendar dates are in the Gregorian system. NOTE: "n.a." in output means quantity "not available" at the print-time. R.A._(ICRF/J2000.0)_DEC = Astrometric right ascension and declination of the TARGET CENTER with respect to the observing site in the coordinates of the ICRF/J2000 inertial reference frame. Compensated for down-leg light-time. Units: RA in hours-minutes-seconds of time (HH MM SS.ff), DEC in angular degrees-minutes-seconds (DD MM SS.f) APmag = Asteroid's approximate apparent visual magnitude from the standard IAU H-G magnitude relationship: APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi1 + G*phi2). 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. Units: MAGNITUDE delta deldot = Range ("delta") and range-rate ("delta-dot") of target center with respect to the observer at the instant light seen by the observer at print-time would have left the target center (print-time minus down-leg light-time); the distance traveled by a light ray emanating from the center of the target and recorded by the observer at print-time. "deldot" is a projection of the velocity vector along this ray, the light-time-corrected line-of-sight from the coordinate center, and indicates relative motion. A positive "deldot" means the target center is moving away from the observer (coordinate center). A negative "deldot" means the target center is moving toward the observer. Units: AU and KM/S S-O-T /r = Sun-Observer-Target angle; target's apparent SOLAR ELONGATION seen from the observer location at print-time. Angular units: DEGREES The '/r' column indicates the target's apparent position relative to the Sun in the observer's sky, as described below: For an observing location on the surface of a rotating body (considering its rotational sense): /T indicates target TRAILS Sun (evening sky; rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky; rises and sets BEFORE Sun) For an observing point NOT on a rotating body (such as a spacecraft), the "leading" and "trailing" condition is defined by the observer's heliocentric orbital motion: if continuing in the observer's current direction of heliocentric motion would encounter the target's 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 target's, the target TRAILS the Sun. NOTE: 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 are defined in the equator of a spherical coordinate system. S-T-O = "S-T-O" is the Sun->Target->Observer angle; the interior vertex angle at target center formed by a vector to the apparent center of the Sun at reflection time on the target and the apparent vector to the observer at print-time. Slightly different from true PHASE ANGLE (requestable separately) at the few arcsecond level in that it includes stellar aberration on the down-leg from target to observer. Units: DEGREES Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA Information: http://ssd.jpl.nasa.gov/ Connect : telnet://ssd.jpl.nasa.gov:6775 (via browser) telnet ssd.jpl.nasa.gov 6775 (via command-line) Author : Jon.D.Giorgini@jpl.nasa.gov *******************************************************************************************************