******************************************************************************* JPL/HORIZONS 152P/Helin-Lawrence 2024-May-22 20:06:29 Rec #:90001085 (+COV) Soln.date: 2024-May-14_12:42:30 # obs: 1279 (1993-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457015.5 ! 2014-Dec-24.0000000 (TDB) RMSW= n.a. EC= .3071830217195811 QR= 3.113166242170746 TP= 2456116.8873693771 OM= 91.90079349630747 W= 163.5967547321304 IN= 9.868206052121014 A= 4.493490113215278 MA= 92.98243320368556 ADIST= 5.873813984259809 PER= 9.525414605681799 N= .103473321 ANGMOM= .034701704 DAN= 5.76969 DDN= 3.14323 L= 255.7274658 B= 2.7740663 MOID= 2.09829998 TP= 2012-Jul-08.3873693771 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= 117.411 A1= 9.825657844543E-8 A2= 2.391850948334E-8 A3= -6.0445561409E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#107, data arc: 1993-04-21 to 2024-01-01 2: k1=5.; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 22 20:06:30 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 152P/Helin-Lawrence {source: JPL#107} 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.240522.p240815 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-22. PREDICTS-> 2024-AUG-14 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= 2457015.5 ! 2014-Dec-24.0000000 (TDB) RMSW= n.a. EC= .3071830217195811 QR= 3.113166242170746 TP= 2456116.8873693771 OM= 91.90079349630747 W= 163.5967547321304 IN= 9.868206052121014 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 4.554218911519710E+00 Y= 1.953945309403063E+00 Z=-2.708010477887157E-02 VX=-5.298145242979687E-04 VY= 6.677406305600578E-03 VZ= 2.949501652347902E-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= 117.411 A1= 9.825657844543E-8 A2= 2.391850948334E-8 A3= -6.0445561409E-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 3.110221830055 -0.0563088 2031-Jul-06 03:00 3.110217839236 -0.0542555 2031-Jul-06 06:00 3.110213996643 -0.0522023 2031-Jul-06 09:00 3.110210302277 -0.0501490 2031-Jul-06 12:00 3.110206756139 -0.0480957 2031-Jul-06 15:00 3.110203358232 -0.0460423 2031-Jul-06 18:00 3.110200108558 -0.0439889 2031-Jul-06 21:00 3.110197007117 -0.0419355 2031-Jul-07 00:00 3.110194053912 -0.0398821 2031-Jul-07 03:00 3.110191248944 -0.0378287 2031-Jul-07 06:00 3.110188592214 -0.0357752 2031-Jul-07 09:00 3.110186083725 -0.0337217 2031-Jul-07 12:00 3.110183723478 -0.0316682 2031-Jul-07 15:00 3.110181511473 -0.0296147 2031-Jul-07 18:00 3.110179447713 -0.0275612 2031-Jul-07 21:00 3.110177532198 -0.0255076 2031-Jul-08 00:00 3.110175764931 -0.0234540 2031-Jul-08 03:00 3.110174145911 -0.0214005 2031-Jul-08 06:00 3.110172675141 -0.0193468 2031-Jul-08 09:00 3.110171352621 -0.0172932 2031-Jul-08 12:00 3.110170178353 -0.0152396 2031-Jul-08 15:00 3.110169152338 -0.0131859 2031-Jul-08 18:00 3.110168274576 -0.0111322 2031-Jul-08 21:00 3.110167545069 -0.0090786 2031-Jul-09 00:00 3.110166963818 -0.0070249 2031-Jul-09 03:00 3.110166530823 -0.0049712 2031-Jul-09 06:00 3.110166246085 -0.0029174 2031-Jul-09 09:00 3.110166109605 -0.0008637 2031-Jul-09 12:00 3.110166121384 0.0011900 2031-Jul-09 15:00 3.110166281422 0.0032438 2031-Jul-09 18:00 3.110166589721 0.0052976 2031-Jul-09 21:00 3.110167046280 0.0073513 2031-Jul-10 00:00 3.110167651100 0.0094051 2031-Jul-10 03:00 3.110168404183 0.0114589 2031-Jul-10 06:00 3.110169305528 0.0135127 2031-Jul-10 09:00 3.110170355135 0.0155665 2031-Jul-10 12:00 3.110171553006 0.0176203 2031-Jul-10 15:00 3.110172899140 0.0196741 2031-Jul-10 18:00 3.110174393538 0.0217279 2031-Jul-10 21:00 3.110176036200 0.0237817 2031-Jul-11 00:00 3.110177827126 0.0258356 2031-Jul-11 03:00 3.110179766316 0.0278894 2031-Jul-11 06:00 3.110181853772 0.0299432 2031-Jul-11 09:00 3.110184089492 0.0319970 2031-Jul-11 12:00 3.110186473476 0.0340509 2031-Jul-11 15:00 3.110189005726 0.0361047 2031-Jul-11 18:00 3.110191686240 0.0381585 2031-Jul-11 21:00 3.110194515018 0.0402123 2031-Jul-12 00:00 3.110197492061 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' QUANTITIES = '19' START_TIME = '2031-Jul-06' STEP_SIZE = '3 hours' STOP_TIME = '2031-Jul-12'