******************************************************************************* JPL/HORIZONS 71P/Clark 2024-May-01 07:22:44 Rec #:90000728 (+COV) Soln.date: 2024-Jan-02_09:38:51 # obs: 1367 (2016-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458629.5 ! 2019-May-26.0000000 (TDB) RMSW= n.a. EC= .494504749101688 QR= 1.586666263804545 TP= 2457934.8649841715 OM= 59.44359451637261 W= 208.9691151233148 IN= 9.444519066362215 A= 3.138835154207467 MA= 123.1141536347842 ADIST= 4.691004044610388 PER= 5.5611033235118 N= .177235744 ANGMOM= .026489447 DAN= 4.17945 DDN= 1.65519 L= 268.0825687 B= -4.5584607 MOID= .57862699 TP= 2017-Jun-30.3649841715 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .680 M1= 11.1 M2= 14.6 k1= 14.25 k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 30.58491 A1= 2.275543689728E-8 A2= 2.001597546041E-10 A3= 1.492929458618E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K232/38, data arc: 2016-02-12 to 2023-12-15 2: k1=14.25, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 1 07:22:44 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 71P/Clark {source: JPL#K232/38} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1930-May-31 00:00:00.0000 UT Stop time : A.D. 1930-Jun-01 00:00:00.0000 UT Step-size : 60 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 0.68 km 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.240430.p240724 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-30. PREDICTS-> 2024-JUL-23 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= 2458629.5 ! 2019-May-26.0000000 (TDB) RMSW= n.a. EC= .494504749101688 QR= 1.586666263804545 TP= 2457934.8649841715 OM= 59.44359451637261 W= 208.9691151233148 IN= 9.444519066362215 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.833263951969485E+00 Y= 3.585063938199186E+00 Z= 1.631075506729773E+00 VX=-4.538304640771230E-03 VY= 3.722884836988434E-03 VZ= 2.737857034568370E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .680 M1= 11.1 M2= 14.6 k1= 14.25 k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 30.58491 A1= 2.275543689728E-8 A2= 2.001597546041E-10 A3= 1.492929458618E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************** Date__(UT)__HR:MN r rdot delta deldot ******************************************************************************** $$SOE 1930-May-31 00:00 4.469421883594 -2.8977302 5.28870699701887 11.5202356 1930-May-31 01:00 4.469352149237 -2.8981099 5.28898407403184 11.5072868 1930-May-31 02:00 4.469282405741 -2.8984895 5.28926083939862 11.4943351 1930-May-31 03:00 4.469212653107 -2.8988692 5.28953729304834 11.4813805 1930-May-31 04:00 4.469142891333 -2.8992488 5.28981343491056 11.4684229 1930-May-31 05:00 4.469073120420 -2.8996285 5.29008926491528 11.4554624 1930-May-31 06:00 4.469003340369 -2.9000082 5.29036478299298 11.4424991 1930-May-31 07:00 4.468933551178 -2.9003878 5.29063998907460 11.4295329 1930-May-31 08:00 4.468863752848 -2.9007675 5.29091488309147 11.4165639 1930-May-31 09:00 4.468793945379 -2.9011471 5.29118946497550 11.4035920 1930-May-31 10:00 4.468724128771 -2.9015268 5.29146373465895 11.3906173 1930-May-31 11:00 4.468654303024 -2.9019065 5.29173769207453 11.3776398 1930-May-31 12:00 4.468584468138 -2.9022861 5.29201133715543 11.3646596 1930-May-31 13:00 4.468514624112 -2.9026658 5.29228466983528 11.3516766 1930-May-31 14:00 4.468444770948 -2.9030455 5.29255769004816 11.3386909 1930-May-31 15:00 4.468374908644 -2.9034252 5.29283039772859 11.3257025 1930-May-31 16:00 4.468305037200 -2.9038048 5.29310279281150 11.3127114 1930-May-31 17:00 4.468235156617 -2.9041845 5.29337487523231 11.2997176 1930-May-31 18:00 4.468165266895 -2.9045642 5.29364664492686 11.2867212 1930-May-31 19:00 4.468095368033 -2.9049439 5.29391810183140 11.2737221 1930-May-31 20:00 4.468025460032 -2.9053235 5.29418924588267 11.2607204 1930-May-31 21:00 4.467955542892 -2.9057032 5.29446007701780 11.2477161 1930-May-31 22:00 4.467885616611 -2.9060829 5.29473059517437 11.2347092 1930-May-31 23:00 4.467815681192 -2.9064626 5.29500080029037 11.2216997 1930-Jun-01 00:00 4.467745736632 -2.9068423 5.29527069230423 11.2086877 $$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 '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 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 = '90000728' START_TIME = '1930-05-31' STOP_TIME = '1930-06-01' STEP_SIZE = '1 hour' QUANTITIES = '19,20'