API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 132P/Helin-Roman-Alu 2 2024-May-05 14:19:38 Rec #:90001050 (+COV) Soln.date: 2024-Jan-29_21:49:25 # obs: 1323 (2014-2022) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459491.5 ! 2021-Oct-04.0000000 (TDB) RMSW= n.a. EC= .5646962951942371 QR= 1.691774595818599 TP= 2459531.6064627655 OM= 173.9965710751069 W= 216.3455154483562 IN= 5.382515463131783 A= 3.886423609864489 MA= 354.8406709055082 ADIST= 6.08107262391038 PER= 7.6618457769762 N= .128640841 ANGMOM= .027987733 DAN= 4.85565 DDN= 1.81952 L= 30.2213011 B= -3.1869182 MOID= .69996899 TP= 2021-Nov-13.1064627655 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 10.2 M2= 15.1 k1= 22.25 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#K212/20, data arc: 2014-08-30 to 2022-04-02 2: k1=22.25, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sun May 5 14:19:38 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 132P/Helin-Roman-Alu 2 {source: JPL#K212/20} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2029-Jul-16 00:00:00.0000 UT Stop time : A.D. 2029-Jul-22 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.240503.p240727 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-03. PREDICTS-> 2024-JUL-26 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= 2459491.5 ! 2021-Oct-04.0000000 (TDB) RMSW= n.a. EC= .5646962951942371 QR= 1.691774595818599 TP= 2459531.6064627655 OM= 173.9965710751069 W= 216.3455154483562 IN= 5.382515463131783 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.719453459503488E+00 Y= 2.436409695729104E-01 Z= 6.182191217217797E-02 VX=-4.544130261658763E-03 VY= 1.482824005764253E-02 VZ= 4.889542421283108E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 10.2 M2= 15.1 k1= 22.25 k2= 5. PHCOF= .030 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2029-Jul-16 00:00 1.703279676431 -0.3667721 2029-Jul-16 03:00 1.703253645516 -0.3543450 2029-Jul-16 06:00 1.703228511821 -0.3419170 2029-Jul-16 09:00 1.703204275411 -0.3294881 2029-Jul-16 12:00 1.703180936345 -0.3170584 2029-Jul-16 15:00 1.703158494683 -0.3046280 2029-Jul-16 18:00 1.703136950482 -0.2921967 2029-Jul-16 21:00 1.703116303794 -0.2797647 2029-Jul-17 00:00 1.703096554673 -0.2673320 2029-Jul-17 03:00 1.703077703168 -0.2548987 2029-Jul-17 06:00 1.703059749327 -0.2424647 2029-Jul-17 09:00 1.703042693195 -0.2300301 2029-Jul-17 12:00 1.703026534814 -0.2175949 2029-Jul-17 15:00 1.703011274225 -0.2051591 2029-Jul-17 18:00 1.702996911468 -0.1927229 2029-Jul-17 21:00 1.702983446577 -0.1802861 2029-Jul-18 00:00 1.702970879587 -0.1678489 2029-Jul-18 03:00 1.702959210530 -0.1554113 2029-Jul-18 06:00 1.702948439434 -0.1429733 2029-Jul-18 09:00 1.702938566328 -0.1305349 2029-Jul-18 12:00 1.702929591235 -0.1180962 2029-Jul-18 15:00 1.702921514179 -0.1056572 2029-Jul-18 18:00 1.702914335180 -0.0932179 2029-Jul-18 21:00 1.702908054256 -0.0807784 2029-Jul-19 00:00 1.702902671422 -0.0683387 2029-Jul-19 03:00 1.702898186693 -0.0558988 2029-Jul-19 06:00 1.702894600079 -0.0434588 2029-Jul-19 09:00 1.702891911590 -0.0310187 2029-Jul-19 12:00 1.702890121232 -0.0185785 2029-Jul-19 15:00 1.702889229009 -0.0061382 2029-Jul-19 18:00 1.702889234925 0.0063021 2029-Jul-19 21:00 1.702890138979 0.0187423 2029-Jul-20 00:00 1.702891941169 0.0311825 2029-Jul-20 03:00 1.702894641490 0.0436227 2029-Jul-20 06:00 1.702898239935 0.0560627 2029-Jul-20 09:00 1.702902736495 0.0685026 2029-Jul-20 12:00 1.702908131160 0.0809423 2029-Jul-20 15:00 1.702914423915 0.0933818 2029-Jul-20 18:00 1.702921614744 0.1058211 2029-Jul-20 21:00 1.702929703629 0.1182601 2029-Jul-21 00:00 1.702938690551 0.1306988 2029-Jul-21 03:00 1.702948575486 0.1431372 2029-Jul-21 06:00 1.702959358409 0.1555752 2029-Jul-21 09:00 1.702971039294 0.1680128 2029-Jul-21 12:00 1.702983618110 0.1804500 2029-Jul-21 15:00 1.702997094826 0.1928868 2029-Jul-21 18:00 1.703011469409 0.2053230 2029-Jul-21 21:00 1.703026741821 0.2177588 2029-Jul-22 00:00 1.703042912025 0.2301940 $$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 *******************************************************************************