******************************************************************************* JPL/HORIZONS Lemmon (C/2018 C2) 2024-May-03 01:50:55 Rec #:90004448 (+COV) Soln.date: 2021-Apr-15_23:33:41 # obs: 1672 (272 days) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458258.5 ! 2018-May-20.0000000 (TDB) RMSW= n.a. EC= 1.00180655729515 QR= 1.95651250015357 TP= 2458271.7239238825 OM= 91.13971556097802 W= 134.1384875107038 IN= 34.45339329783236 A= -1083.00606097916 MA= -.000365694209742405ADIST= 9.999999E99 PER= 9.999999E99 N= 2.7654E-5 ANGMOM= .034043469 DAN= 12.95386 DDN= 2.30704 L= 230.7830141 B= 23.9541278 MOID= 1.06201994 TP= 2018-Jun-02.2239238825 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 7.6 M2= 14.8 k1= 26.5 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#12, data arc: 2018-01-28 to 2018-10-27 2: k1=26.5, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri May 3 01:50:55 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Lemmon (C/2018 C2) {source: JPL#12} Center body name: Sun (10) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 2022-Oct-01 00:00:00.0000 TDB Stop time : A.D. 2023-Apr-01 00:00:00.0000 TDB Step-size : 1 calendar months ******************************************************************************* Center geodetic : 0.0, 0.0, 0.0 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center radii : 695700.0, 695700.0, 695700.0 km {Equator_a, b, pole_c} Keplerian GM : 2.9591220828411951E-04 au^3/d^2 Small perturbers: Yes {source: SB441-N16} Output units : AU-D, deg, Julian Day Number (Tp) Calendar mode : Mixed Julian/Gregorian Output type : GEOMETRIC osculating elements Output format : 10 Reference frame : Ecliptic of J2000.0 ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2458258.5 ! 2018-May-20.0000000 (TDB) RMSW= n.a. EC= 1.00180655729515 QR= 1.95651250015357 TP= 2458271.7239238825 OM= 91.13971556097802 W= 134.1384875107038 IN= 34.45339329783236 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.261816103580406E+00 Y=-1.468587810443554E+00 Z= 3.247955976013766E-01 VX= 9.615069311906525E-03 VY=-9.341434087552497E-03 VZ=-1.104580730042142E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 7.6 M2= 14.8 k1= 26.5 k2= 5. PHCOF= .030 ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2459853.500000000 = A.D. 2022-Oct-01 00:00:00.0000 TDB EC= 1.000084368079973E+00 QR= 1.960820290391605E+00 IN= 3.446314416879981E+01 OM= 9.123195980924315E+01 W = 1.340378175136053E+02 Tp= 2458269.998224089853 N = 2.781727820095915E-07 MA= 4.404870943220965E-04 TA= 1.347738607579559E+02 A =-2.324125772482924E+04 AD= 9.999999999999998E+99 PR= 9.999999999999998E+99 2459884.500000000 = A.D. 2022-Nov-01 00:00:00.0000 TDB EC= 1.000049975031826E+00 QR= 1.960805655976088E+00 IN= 3.446320828091554E+01 OM= 9.123831286238807E+01 W = 1.340300266757974E+02 Tp= 2458269.931721013505 N = 1.268182822781244E-07 MA= 2.047567757617870E-04 TA= 1.351153586859569E+02 A =-3.923570599824920E+04 AD= 9.999999999999998E+99 PR= 9.999999999999998E+99 2459914.500000000 = A.D. 2022-Dec-01 00:00:00.0000 TDB EC= 1.000016492691669E+00 QR= 1.960811111120284E+00 IN= 3.446325310931442E+01 OM= 9.124485010417246E+01 W = 1.340223708253103E+02 Tp= 2458269.862674526870 N = 2.404294953761975E-08 MA= 3.954193222403551E-05 TA= 1.354366401798895E+02 A =-1.188896967532980E+05 AD= 9.999999999999998E+99 PR= 9.999999999999998E+99 2459945.500000000 = A.D. 2023-Jan-01 00:00:00.0000 TDB EC= 9.999794840828412E-01 QR= 1.960777304276783E+00 IN= 3.446328133302129E+01 OM= 9.125236063775053E+01 W = 1.340131778888238E+02 Tp= 2458269.788778197952 N = 3.335785157574454E-08 MA= 5.589812624075492E-05 TA= 1.357604234765494E+02 A = 9.557346567016000E+04 AD= 1.911449705630157E+05 PR= 1.079206192828577E+10 2459976.500000000 = A.D. 2023-Feb-01 00:00:00.0000 TDB EC= 9.999423717630217E-01 QR= 1.960672175570740E+00 IN= 3.446328675646787E+01 OM= 9.125980710130739E+01 W = 1.340031684489646E+02 Tp= 2458269.720865663607 N = 1.570542146541546E-07 MA= 2.680568565533810E-04 TA= 1.360764676685036E+02 A = 3.402276866977724E+04 AD= 6.804357666737892E+04 PR= 2.292202095898844E+09 2460004.500000000 = A.D. 2023-Mar-01 00:00:00.0000 TDB EC= 9.999093471371214E-01 QR= 1.960539100668847E+00 IN= 3.446327290902357E+01 OM= 9.126635842597987E+01 W = 1.339938494609159E+02 Tp= 2458269.663290950470 N = 3.098939498826224E-07 MA= 5.376154001933960E-04 TA= 1.363552695500115E+02 A = 2.162688566479288E+04 AD= 4.325181079048510E+04 PR= 1.161687732646462E+09 2460035.500000000 = A.D. 2023-Apr-01 00:00:00.0000 TDB EC= 9.998741182671049E-01 QR= 1.960343770372676E+00 IN= 3.446323958230143E+01 OM= 9.127319986251385E+01 W = 1.339834007112200E+02 Tp= 2458269.606361619662 N = 5.071655990320679E-07 MA= 8.956005049594677E-04 TA= 1.366569085801690E+02 A = 1.557290104988658E+04 AD= 3.114384175600280E+04 PR= 7.098273240280191E+08 $$EOE ******************************************************************************* TIME Barycentric Dynamical Time ("TDB" or T_eph) output was requested. This continuous coordinate time is equivalent to the relativistic proper time of a clock at rest in a reference frame co-moving with the solar system barycenter but outside the system's gravity well. It is the independent variable in the solar system relativistic equations of motion. TDB runs at a uniform rate of one SI second per second and is independent of irregularities in Earth's rotation. 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. REFERENCE FRAME AND COORDINATES Ecliptic at the standard reference epoch Reference epoch: J2000.0 X-Y plane: adopted Earth orbital plane at the reference epoch Note: IAU76 obliquity of 84381.448 arcseconds wrt ICRF X-Y plane X-axis : ICRF Z-axis : perpendicular to the X-Y plane in the directional (+ or -) sense of Earth's north pole at the reference epoch. Symbol meaning [1 au= 149597870.700 km, 1 day= 86400.0 s]: JDTDB Julian Day Number, Barycentric Dynamical Time EC Eccentricity, e QR Periapsis distance, q (au) IN Inclination w.r.t X-Y plane, i (degrees) OM Longitude of Ascending Node, OMEGA, (degrees) W Argument of Perifocus, w (degrees) Tp Time of periapsis (Julian Day Number) N Mean motion, n (degrees/day) MA Mean anomaly, M (degrees) TA True anomaly, nu (degrees) A Semi-major axis, a (au) AD Apoapsis distance (au) PR Sidereal orbit period (day) ABERRATIONS AND CORRECTIONS Geometric osculating elements have NO corrections or aberrations applied. 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 = '2018 C2' MAKE_EPHEM = 'YES' TABLE_TYPE = 'ELEMENTS' START_TIME = '2022-10-01' STOP_TIME = '2023-04-01' STEP_SIZE = '1 month' CENTER = '@Sun' OUT_UNITS = 'AU-D'