******************************************************************************* JPL/HORIZONS 152P/Helin-Lawrence 2024-May-09 15:09:53 Rec #:90001085 (+COV) Soln.date: 2024-Apr-29_13:12:27 # obs: 1274 (1993-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457007.5 ! 2014-Dec-16.0000000 (TDB) RMSW= n.a. EC= .3071778237538525 QR= 3.113220350977765 TP= 2456116.8906631288 OM= 91.90106653708202 W= 163.5983193601516 IN= 9.86819057774273 A= 4.493534499495716 MA= 92.1529403993447 ADIST= 5.873848648013667 PER= 9.5255557427793 N= .103471788 ANGMOM= .034701936 DAN= 5.76975 DDN= 3.14328 L= 255.7292832 B= 2.7738044 MOID= 2.09938002 TP= 2012-Jul-08.3906631288 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 13.3 M2= n.a. k1= 5. k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 117.3524 A1= 9.822548866272E-8 A2= 2.392256498337E-8 A3= -6.055408000946E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#106, data arc: 1993-04-21 to 2024-01-01 2: k1=5.; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 9 15:09:53 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 152P/Helin-Lawrence {source: JPL#106} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2031-Jul-06 00:00:00.0000 UT Stop time : A.D. 2031-Jul-12 00:00:00.0000 UT Step-size : 180 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.240509.p240802 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-09. PREDICTS-> 2024-AUG-01 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= 2457007.5 ! 2014-Dec-16.0000000 (TDB) RMSW= n.a. EC= .3071778237538525 QR= 3.113220350977765 TP= 2456116.8906631288 OM= 91.90106653708202 W= 163.5983193601516 IN= 9.86819057774273 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 4.558101839096382E+00 Y= 1.900374756453603E+00 Z=-5.067348686090856E-02 VX=-4.407544801971377E-04 VY= 6.715124945121907E-03 VZ= 2.948755572831597E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 13.3 M2= n.a. k1= 5. k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 117.3524 A1= 9.822548866272E-8 A2= 2.392256498337E-8 A3= -6.055408000946E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2031-Jul-06 00:00 3.110221843327 -0.0563087 2031-Jul-06 03:00 3.110217852512 -0.0542555 2031-Jul-06 06:00 3.110214009923 -0.0522022 2031-Jul-06 09:00 3.110210315560 -0.0501489 2031-Jul-06 12:00 3.110206769426 -0.0480956 2031-Jul-06 15:00 3.110203371522 -0.0460423 2031-Jul-06 18:00 3.110200121851 -0.0439889 2031-Jul-06 21:00 3.110197020414 -0.0419355 2031-Jul-07 00:00 3.110194067212 -0.0398821 2031-Jul-07 03:00 3.110191262247 -0.0378286 2031-Jul-07 06:00 3.110188605521 -0.0357752 2031-Jul-07 09:00 3.110186097035 -0.0337217 2031-Jul-07 12:00 3.110183736791 -0.0316682 2031-Jul-07 15:00 3.110181524790 -0.0296147 2031-Jul-07 18:00 3.110179461033 -0.0275611 2031-Jul-07 21:00 3.110177545522 -0.0255076 2031-Jul-08 00:00 3.110175778258 -0.0234540 2031-Jul-08 03:00 3.110174159242 -0.0214004 2031-Jul-08 06:00 3.110172688475 -0.0193468 2031-Jul-08 09:00 3.110171365959 -0.0172932 2031-Jul-08 12:00 3.110170191694 -0.0152395 2031-Jul-08 15:00 3.110169165682 -0.0131859 2031-Jul-08 18:00 3.110168287924 -0.0111322 2031-Jul-08 21:00 3.110167558420 -0.0090785 2031-Jul-09 00:00 3.110166977172 -0.0070248 2031-Jul-09 03:00 3.110166544180 -0.0049711 2031-Jul-09 06:00 3.110166259445 -0.0029174 2031-Jul-09 09:00 3.110166122969 -0.0008637 2031-Jul-09 12:00 3.110166134751 0.0011901 2031-Jul-09 15:00 3.110166294793 0.0032438 2031-Jul-09 18:00 3.110166603095 0.0052976 2031-Jul-09 21:00 3.110167059657 0.0073514 2031-Jul-10 00:00 3.110167664481 0.0094051 2031-Jul-10 03:00 3.110168417567 0.0114589 2031-Jul-10 06:00 3.110169318915 0.0135127 2031-Jul-10 09:00 3.110170368526 0.0155665 2031-Jul-10 12:00 3.110171566400 0.0176203 2031-Jul-10 15:00 3.110172912537 0.0196741 2031-Jul-10 18:00 3.110174406938 0.0217280 2031-Jul-10 21:00 3.110176049603 0.0237818 2031-Jul-11 00:00 3.110177840533 0.0258356 2031-Jul-11 03:00 3.110179779727 0.0278894 2031-Jul-11 06:00 3.110181867185 0.0299433 2031-Jul-11 09:00 3.110184102909 0.0319971 2031-Jul-11 12:00 3.110186486897 0.0340509 2031-Jul-11 15:00 3.110189019149 0.0361047 2031-Jul-11 18:00 3.110191699666 0.0381586 2031-Jul-11 21:00 3.110194528448 0.0402124 2031-Jul-12 00:00 3.110197505494 0.0422662 $$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 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 = '152P' START_TIME = '2031-Jul-06' STOP_TIME = '2031-Jul-12' STEP_SIZE = '3 hours' QUANTITIES = '19'