API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 99P/Kowal 1 2024-Apr-28 05:17:39 Rec #:90000939 (+COV) Soln.date: 2024-Jan-05_12:43:19 # obs: 1692 (1977-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457013.5 ! 2014-Dec-22.0000000 (TDB) RMSW= n.a. EC= .2296848037533113 QR= 4.72601862026136 TP= 2459677.9284526636 OM= 28.17946893961375 W= 174.1919145036272 IN= 4.337463321740445 A= 6.135175111809532 MA= 187.1904687646634 ADIST= 7.544331603357703 PER= 15.196677488395 N= .06485801200000001 ANGMOM= .041469238 DAN= 7.5328 DDN= 4.73055 L= 202.3879052 B= .4385221 MOID= 3.72207999 TP= 2022-Apr-08.4284526636 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 5.1 M1= 6.7 M2= 11.5 k1= 12. k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#71, data arc: 1977-04-24 to 2023-08-22 2: k1=12., k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sun Apr 28 05:17:39 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 99P/Kowal 1 {source: JPL#71} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2037-May-03 00:00:00.0000 UT Stop time : A.D. 2037-May-09 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 5.1 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.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 (>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= 2457013.5 ! 2014-Dec-22.0000000 (TDB) RMSW= n.a. EC= .2296848037533113 QR= 4.72601862026136 TP= 2459677.9284526636 OM= 28.17946893961375 W= 174.1919145036272 IN= 4.337463321740445 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 6.715154768769033E+00 Y= 3.144651687473690E+00 Z= 1.350611224666921E+00 VX=-2.608568283872223E-03 VY= 4.264320952144610E-03 VZ= 2.302491304231149E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 5.1 M1= 6.7 M2= 11.5 k1= 12. k2= 5. PHCOF= .030 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2037-May-03 00:00 4.752830411626 -0.0177538 2037-May-03 03:00 4.752829153050 -0.0171142 2037-May-03 06:00 4.752827940649 -0.0164746 2037-May-03 09:00 4.752826774423 -0.0158350 2037-May-03 12:00 4.752825654371 -0.0151954 2037-May-03 15:00 4.752824580493 -0.0145557 2037-May-03 18:00 4.752823552790 -0.0139161 2037-May-03 21:00 4.752822571261 -0.0132765 2037-May-04 00:00 4.752821635907 -0.0126369 2037-May-04 03:00 4.752820746728 -0.0119973 2037-May-04 06:00 4.752819903724 -0.0113577 2037-May-04 09:00 4.752819106895 -0.0107180 2037-May-04 12:00 4.752818356241 -0.0100784 2037-May-04 15:00 4.752817651762 -0.0094388 2037-May-04 18:00 4.752816993458 -0.0087992 2037-May-04 21:00 4.752816381329 -0.0081595 2037-May-05 00:00 4.752815815375 -0.0075199 2037-May-05 03:00 4.752815295597 -0.0068803 2037-May-05 06:00 4.752814821994 -0.0062406 2037-May-05 09:00 4.752814394566 -0.0056010 2037-May-05 12:00 4.752814013314 -0.0049614 2037-May-05 15:00 4.752813678237 -0.0043217 2037-May-05 18:00 4.752813389335 -0.0036821 2037-May-05 21:00 4.752813146609 -0.0030425 2037-May-06 00:00 4.752812950059 -0.0024028 2037-May-06 03:00 4.752812799684 -0.0017632 2037-May-06 06:00 4.752812695484 -0.0011236 2037-May-06 09:00 4.752812637460 -0.0004839 2037-May-06 12:00 4.752812625611 0.0001557 2037-May-06 15:00 4.752812659939 0.0007953 2037-May-06 18:00 4.752812740441 0.0014350 2037-May-06 21:00 4.752812867119 0.0020746 2037-May-07 00:00 4.752813039973 0.0027142 2037-May-07 03:00 4.752813259002 0.0033539 2037-May-07 06:00 4.752813524207 0.0039935 2037-May-07 09:00 4.752813835587 0.0046331 2037-May-07 12:00 4.752814193143 0.0052728 2037-May-07 15:00 4.752814596874 0.0059124 2037-May-07 18:00 4.752815046780 0.0065520 2037-May-07 21:00 4.752815542862 0.0071917 2037-May-08 00:00 4.752816085120 0.0078313 2037-May-08 03:00 4.752816673553 0.0084710 2037-May-08 06:00 4.752817308161 0.0091106 2037-May-08 09:00 4.752817988944 0.0097502 2037-May-08 12:00 4.752818715903 0.0103899 2037-May-08 15:00 4.752819489036 0.0110295 2037-May-08 18:00 4.752820308345 0.0116691 2037-May-08 21:00 4.752821173829 0.0123088 2037-May-09 00:00 4.752822085488 0.0129484 $$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 *******************************************************************************