******************************************************************************* JPL/HORIZONS 12P/Pons-Brooks 2024-May-01 17:03:30 Rec #:90000223 (+COV) Soln.date: 2024-Apr-29_15:04:30 # obs: 7764 (1953-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2460201.5 ! 2023-Sep-14.0000000 (TDB) RMSW= n.a. EC= .9545602321210124 QR= .7808647072011008 TP= 2460421.6315896292 OM= 255.8550487198595 W= 198.988008579359 IN= 74.1908389894113 A= 17.18461038975048 MA= 356.9543716368921 ADIST= 33.58835607229985 PER= 71.23898738491501 N= .01383549 ANGMOM= .021251709 DAN= 15.67302 DDN= .80218 L= 81.2104653 B= -18.2439154 MOID= .181446 TP= 2024-Apr-21.1315896292 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5. M2= 11. k1= 15. k2= 10. PHCOF= n.a. COMET comments 1: soln ref.= JPL#K242/61, data arc: 1953-06-20 to 2024-04-19 2: k1=15.0, k2=10.0; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 1 17:03:30 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 12P/Pons-Brooks {source: JPL#K242/61} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2095-Aug-27 00:00:00.0000 UT Stop time : A.D. 2095-Sep-02 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.240501.p240725 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-01. PREDICTS-> 2024-JUL-24 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= 2460201.5 ! 2023-Sep-14.0000000 (TDB) RMSW= n.a. EC= .9545602321210124 QR= .7808647072011008 TP= 2460421.6315896292 OM= 255.8550487198595 W= 198.988008579359 IN= 74.1908389894113 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 6.283545260894083E-01 Y=-2.181994326134274E+00 Z= 2.388813173497006E+00 VX=-1.271069889007513E-04 VY= 1.205841645754723E-02 VZ=-4.114318311673151E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5. M2= 11. k1= 15. k2= 10. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN delta deldot S-O-T /r **************************************************************** $$SOE 2095-Aug-27 00:00 1.50237764181719 -2.9713951 30.5200 /L 2095-Aug-27 03:00 1.50216622450755 -2.8856768 30.5679 /L 2095-Aug-27 06:00 1.50196100632590 -2.7996556 30.6159 /L 2095-Aug-27 09:00 1.50176200904378 -2.7133341 30.6640 /L 2095-Aug-27 12:00 1.50156925425106 -2.6267147 30.7121 /L 2095-Aug-27 15:00 1.50138276335388 -2.5398000 30.7603 /L 2095-Aug-27 18:00 1.50120255757244 -2.4525927 30.8085 /L 2095-Aug-27 21:00 1.50102865793918 -2.3650953 30.8568 /L 2095-Aug-28 00:00 1.50086108529639 -2.2773104 30.9051 /L 2095-Aug-28 03:00 1.50069986029448 -2.1892408 30.9535 /L 2095-Aug-28 06:00 1.50054500338993 -2.1008892 31.0018 /L 2095-Aug-28 09:00 1.50039653484317 -2.0122583 31.0503 /L 2095-Aug-28 12:00 1.50025447471679 -1.9233507 31.0987 /L 2095-Aug-28 15:00 1.50011884287362 -1.8341694 31.1472 /L 2095-Aug-28 18:00 1.49998965897475 -1.7447171 31.1958 /L 2095-Aug-28 21:00 1.49986694247777 -1.6549967 31.2443 /L 2095-Aug-29 00:00 1.49975071263489 -1.5650110 31.2929 /L 2095-Aug-29 03:00 1.49964098849100 -1.4747628 31.3415 /L 2095-Aug-29 06:00 1.49953778888222 -1.3842552 31.3902 /L 2095-Aug-29 09:00 1.49944113243381 -1.2934910 31.4389 /L 2095-Aug-29 12:00 1.49935103755868 -1.2024732 31.4876 /L 2095-Aug-29 15:00 1.49926752245554 -1.1112047 31.5363 /L 2095-Aug-29 18:00 1.49919060510740 -1.0196886 31.5850 /L 2095-Aug-29 21:00 1.49912030327980 -0.9279279 31.6337 /L 2095-Aug-30 00:00 1.49905663451929 -0.8359256 31.6825 /L 2095-Aug-30 03:00 1.49899961615183 -0.7436848 31.7313 /L 2095-Aug-30 06:00 1.49894926528126 -0.6512086 31.7801 /L 2095-Aug-30 09:00 1.49890559878793 -0.5585000 31.8289 /L 2095-Aug-30 12:00 1.49886863332690 -0.4655623 31.8777 /L 2095-Aug-30 15:00 1.49883838532692 -0.3723985 31.9265 /L 2095-Aug-30 18:00 1.49881487098870 -0.2790119 31.9753 /L 2095-Aug-30 21:00 1.49879810628370 -0.1854056 32.0241 /L 2095-Aug-31 00:00 1.49878810695276 -0.0915828 32.0729 /L 2095-Aug-31 03:00 1.49878488850485 0.0024533 32.1218 /L 2095-Aug-31 06:00 1.49878846621567 0.0966994 32.1706 /L 2095-Aug-31 09:00 1.49879885512659 0.1911522 32.2194 /L 2095-Aug-31 12:00 1.49881607004333 0.2858086 32.2682 /L 2095-Aug-31 15:00 1.49884012553487 0.3806651 32.3170 /L 2095-Aug-31 18:00 1.49887103593231 0.4757186 32.3658 /L 2095-Aug-31 21:00 1.49890881532776 0.5709657 32.4146 /L 2095-Sep-01 00:00 1.49895347757329 0.6664030 32.4633 /L 2095-Sep-01 03:00 1.49900503628001 0.7620272 32.5121 /L 2095-Sep-01 06:00 1.49906350481698 0.8578350 32.5608 /L 2095-Sep-01 09:00 1.49912889631028 0.9538230 32.6096 /L 2095-Sep-01 12:00 1.49920122364220 1.0499877 32.6583 /L 2095-Sep-01 15:00 1.49928049945025 1.1463259 32.7069 /L 2095-Sep-01 18:00 1.49936673612646 1.2428340 32.7556 /L 2095-Sep-01 21:00 1.49945994581645 1.3395088 32.8042 /L 2095-Sep-02 00:00 1.49956014041884 1.4363467 32.8528 /L $$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. '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 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 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 = '90000223' START_TIME = '2095-Aug-27' STOP_TIME = '2095-Sep-02' STEP_SIZE = '3 hours' QUANTITIES = '20,23'