******************************************************************************* JPL/HORIZONS 1I/'Oumuamua (A/2017 U1) 2024-Apr-26 23:45:20 Rec #:50455050 (+COV) Soln.date: 2018-Jun-26_12:17:57 # obs: 207 (2017-2018) NOTE: This orbit solution includes non-gravitational perturbations as described in Micheli et al. (2018): http://dx.doi.org/10.1038/s41586-018-0254-4 The behavior of these accelerations outside the observed data arc from 2017 October 14 to 2018 January 2 can only be assumed. Predictions outside this time interval, especially prior to October 2017, could be much more uncertain than reported here. IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458080.5 ! 2017-Nov-23.00 (TDB) Residual RMS= .063527 EC= 1.201133796102373 QR= .2559115812959116 TP= 2458006.0073213754 OM= 24.59690955523242 W= 241.8105360304898 IN= 122.7417062847286 A= -1.27234500742808 MA= 51.15761979369358 ADIST= 9.999999E99 PER= 9.999999E99 N= .686746949 ANGMOM= .012910695 DAN= 1.30212 DDN= .35938 L= 159.3364991 B= -47.84677 MOID= .0958212 TP= 2017-Sep-09.5073213754 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 7.937 H= 22.08 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. Asteroid non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au): AMRAT= 0. A1= 2.790193367004E-7 A2= 1.441264152527E-8 A3= 1.573922634125E-8 Non-standard or simulated/proxy model: ALN= .04083733261 NK= 2.6 NM= 2. NN= 3. R0= 5. ASTEROID comments: 1: soln ref.= JPL#16 2: source=ORB; Sol. 7c, Micheli et al. 2018 ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Apr 26 23:45:21 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 1I/'Oumuamua (A/2017 U1) {source: JPL#16} Center body name: Sun (10) {source: DE441} Center-site name: BODYCENTRIC ******************************************************************************* Start time : A.D. 1982-Oct-10 00:00:00.0000 UT Stop time : A.D. 1982-Nov-05 00:00:00.0000 UT Step-size : 30 steps ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -695700.0 {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 : IAU_SUN {East-longitude positive} Center radii : 695700.0, 695700.0, 695700.0 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : None 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.240426.p240720 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-26. PREDICTS-> 2024-JUL-19 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 n.a. , 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= 2458080.5 ! 2017-Nov-23.00 (TDB) Residual RMS= .063527 EC= 1.201133796102373 QR= .2559115812959116 TP= 2458006.0073213754 OM= 24.59690955523242 W= 241.8105360304898 IN= 122.7417062847286 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.889136186533479E+00 Y= 5.222899434623107E-01 Z= 5.088057830311858E-01 VX= 2.106502285864550E-02 VY= 3.535022471254454E-04 VZ= 8.998631872968255E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 7.937 H= 22.08 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. Asteroid non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au): AMRAT= 0. A1= 2.790193367004E-7 A2= 1.441264152527E-8 A3= 1.573922634125E-8 Non-standard or simulated/proxy model: ALN= .04083733261 NK= 2.6 NM= 2. NN= 3. R0= 5. ********************************************************************************** Date__(UT)__HR:MN:SC.fff r rdot VmagSn VmagOb ********************************************************************************** $$SOE 1982-Oct-10 00:00:00.000 200.2493433342 -26.5520911 26.5522929 26.5523048 1982-Oct-10 20:48:00.000 200.2360517191 -26.5521066 26.5523084 26.5523204 1982-Oct-11 17:36:00.000 200.2227600962 -26.5521222 26.5523240 26.5523359 1982-Oct-12 14:24:00.000 200.2094684655 -26.5521378 26.5523396 26.5523515 1982-Oct-13 11:12:00.000 200.1961768270 -26.5521534 26.5523551 26.5523670 1982-Oct-14 08:00:00.000 200.1828851807 -26.5521690 26.5523707 26.5523826 1982-Oct-15 04:48:00.000 200.1695935265 -26.5521847 26.5523863 26.5523982 1982-Oct-16 01:36:00.000 200.1563018646 -26.5522003 26.5524018 26.5524138 1982-Oct-16 22:24:00.000 200.1430101948 -26.5522160 26.5524174 26.5524295 1982-Oct-17 19:12:00.000 200.1297185171 -26.5522317 26.5524330 26.5524451 1982-Oct-18 16:00:00.000 200.1164268316 -26.5522474 26.5524487 26.5524608 1982-Oct-19 12:48:00.000 200.1031351382 -26.5522632 26.5524643 26.5524766 1982-Oct-20 09:36:00.000 200.0898434369 -26.5522790 26.5524800 26.5524924 1982-Oct-21 06:24:00.000 200.0765517276 -26.5522948 26.5524957 26.5525082 1982-Oct-22 03:12:00.000 200.0632600105 -26.5523107 26.5525115 26.5525240 1982-Oct-23 00:00:00.000 200.0499682853 -26.5523267 26.5525272 26.5525399 1982-Oct-23 20:48:00.000 200.0366765522 -26.5523426 26.5525431 26.5525559 1982-Oct-24 17:36:00.000 200.0233848110 -26.5523587 26.5525590 26.5525719 1982-Oct-25 14:24:00.000 200.0100930618 -26.5523747 26.5525749 26.5525879 1982-Oct-26 11:12:00.000 199.9968013046 -26.5523909 26.5525908 26.5526040 1982-Oct-27 08:00:00.000 199.9835095393 -26.5524070 26.5526069 26.5526201 1982-Oct-28 04:48:00.000 199.9702177658 -26.5524232 26.5526229 26.5526363 1982-Oct-29 01:36:00.000 199.9569259843 -26.5524395 26.5526390 26.5526525 1982-Oct-29 22:24:00.000 199.9436341946 -26.5524558 26.5526552 26.5526688 1982-Oct-30 19:12:00.000 199.9303423967 -26.5524721 26.5526714 26.5526851 1982-Oct-31 16:00:00.000 199.9170505907 -26.5524885 26.5526876 26.5527014 1982-Nov-01 12:48:00.000 199.9037587764 -26.5525049 26.5527039 26.5527178 1982-Nov-02 09:36:00.000 199.8904669539 -26.5525214 26.5527202 26.5527342 1982-Nov-03 06:24:00.000 199.8771751232 -26.5525378 26.5527366 26.5527507 1982-Nov-04 03:12:00.000 199.8638832842 -26.5525544 26.5527530 26.5527672 1982-Nov-05 00:00:00.000 199.8505914369 -26.5525709 26.5527694 26.5527837 $$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 rdot' = The Sun's apparent range ("r", light-time aberrated) and range-rate ("rdot") relative to the target center, as seen by the observer. A positive "rdot" means the target center was moving away from the Sun, negative means moving toward the Sun. Units: AU and KM/S 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: KM/S 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 = '1I' START_TIME = '1982-10-10' STOP_TIME = '1982-11-05' STEP_SIZE = '30' QUANTITIES = '19,22' CENTER = '@Sun'