******************************************************************************* JPL/HORIZONS 8P/Tuttle 2024-Apr-24 17:10:01 Rec #:90000170 Soln.date: - # obs: 67 (1858-1899) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2404760.5 ! 1871-Nov-29.0000000 (TDB) RMSW= n.a. EC= .821103 QR= 1.030109 TP= 2404763.7976000002 OM= 271.114 W= 206.7765 IN= 54.2819 A= 5.758112209819059 MA= 359.7647758745071 ADIST= 10.48611541963812 PER= 13.817465472101 N= .071331916 ANGMOM= .023560814 DAN= 7.02746 DDN= 1.08244 L= 107.5288136 B= -21.4549667 TP= 1871-Dec-02.2976000002 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.25 M1= 14.6 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= SAO/1871 2: k1=4.5;epoch may be 2404761.0 (hour ambiguous: 12h/0h); non-gravs. considered; 2 ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed Apr 24 17:10:01 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 8P/Tuttle {source: SAO/187120} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2027-Aug-20 00:00:00.0000 UT Stop time : A.D. 2027-Aug-30 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 2.25 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.240424.p240718 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-24. PREDICTS-> 2024-JUL-17 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= 2404760.5 ! 1871-Nov-29.0000000 (TDB) RMSW= n.a. EC= .821103 QR= 1.030109 TP= 2404763.7976000002 OM= 271.114 W= 206.7765 IN= 54.2819 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-2.497067652436582E-01 Y= 9.973120136038486E-01 Z= 8.187868424843343E-02 VX=-1.195845108595976E-02 VY=-2.184542994315852E-03 VZ=-1.935628593185776E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.25 M1= 14.6 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2027-Aug-20 00:00 10.28689063707 1.0683250 2027-Aug-20 03:00 10.28696773997 1.0678304 2027-Aug-20 06:00 10.28704480714 1.0673357 2027-Aug-20 09:00 10.28712183860 1.0668411 2027-Aug-20 12:00 10.28719883435 1.0663464 2027-Aug-20 15:00 10.28727579437 1.0658518 2027-Aug-20 18:00 10.28735271868 1.0653572 2027-Aug-20 21:00 10.28742960727 1.0648626 2027-Aug-21 00:00 10.28750646015 1.0643680 2027-Aug-21 03:00 10.28758327731 1.0638734 2027-Aug-21 06:00 10.28766005875 1.0633788 2027-Aug-21 09:00 10.28773680448 1.0628842 2027-Aug-21 12:00 10.28781351450 1.0623896 2027-Aug-21 15:00 10.28789018880 1.0618950 2027-Aug-21 18:00 10.28796682739 1.0614004 2027-Aug-21 21:00 10.28804343026 1.0609058 2027-Aug-22 00:00 10.28811999743 1.0604113 2027-Aug-22 03:00 10.28819652888 1.0599167 2027-Aug-22 06:00 10.28827302461 1.0594221 2027-Aug-22 09:00 10.28834948464 1.0589276 2027-Aug-22 12:00 10.28842590895 1.0584330 2027-Aug-22 15:00 10.28850229756 1.0579385 2027-Aug-22 18:00 10.28857865045 1.0574440 2027-Aug-22 21:00 10.28865496764 1.0569494 2027-Aug-23 00:00 10.28873124911 1.0564549 2027-Aug-23 03:00 10.28880749488 1.0559604 2027-Aug-23 06:00 10.28888370494 1.0554659 2027-Aug-23 09:00 10.28895987929 1.0549713 2027-Aug-23 12:00 10.28903601793 1.0544768 2027-Aug-23 15:00 10.28911212086 1.0539823 2027-Aug-23 18:00 10.28918818809 1.0534878 2027-Aug-23 21:00 10.28926421961 1.0529934 2027-Aug-24 00:00 10.28934021543 1.0524989 2027-Aug-24 03:00 10.28941617554 1.0520044 2027-Aug-24 06:00 10.28949209994 1.0515099 2027-Aug-24 09:00 10.28956798864 1.0510155 2027-Aug-24 12:00 10.28964384163 1.0505210 2027-Aug-24 15:00 10.28971965892 1.0500265 2027-Aug-24 18:00 10.28979544051 1.0495321 2027-Aug-24 21:00 10.28987118640 1.0490376 2027-Aug-25 00:00 10.28994689658 1.0485432 2027-Aug-25 03:00 10.29002257106 1.0480488 2027-Aug-25 06:00 10.29009820983 1.0475543 2027-Aug-25 09:00 10.29017381291 1.0470599 2027-Aug-25 12:00 10.29024938029 1.0465655 2027-Aug-25 15:00 10.29032491196 1.0460711 2027-Aug-25 18:00 10.29040040793 1.0455767 2027-Aug-25 21:00 10.29047586821 1.0450822 2027-Aug-26 00:00 10.29055129278 1.0445879 2027-Aug-26 03:00 10.29062668166 1.0440935 2027-Aug-26 06:00 10.29070203484 1.0435991 2027-Aug-26 09:00 10.29077735232 1.0431047 2027-Aug-26 12:00 10.29085263410 1.0426103 2027-Aug-26 15:00 10.29092788019 1.0421159 2027-Aug-26 18:00 10.29100309057 1.0416216 2027-Aug-26 21:00 10.29107826526 1.0411272 2027-Aug-27 00:00 10.29115340426 1.0406328 2027-Aug-27 03:00 10.29122850756 1.0401385 2027-Aug-27 06:00 10.29130357517 1.0396442 2027-Aug-27 09:00 10.29137860708 1.0391498 2027-Aug-27 12:00 10.29145360329 1.0386555 2027-Aug-27 15:00 10.29152856381 1.0381611 2027-Aug-27 18:00 10.29160348864 1.0376668 2027-Aug-27 21:00 10.29167837778 1.0371725 2027-Aug-28 00:00 10.29175323122 1.0366782 2027-Aug-28 03:00 10.29182804897 1.0361839 2027-Aug-28 06:00 10.29190283103 1.0356896 2027-Aug-28 09:00 10.29197757740 1.0351953 2027-Aug-28 12:00 10.29205228807 1.0347010 2027-Aug-28 15:00 10.29212696306 1.0342067 2027-Aug-28 18:00 10.29220160236 1.0337124 2027-Aug-28 21:00 10.29227620596 1.0332181 2027-Aug-29 00:00 10.29235077388 1.0327239 2027-Aug-29 03:00 10.29242530611 1.0322296 2027-Aug-29 06:00 10.29249980265 1.0317353 2027-Aug-29 09:00 10.29257426350 1.0312411 2027-Aug-29 12:00 10.29264868866 1.0307468 2027-Aug-29 15:00 10.29272307814 1.0302526 2027-Aug-29 18:00 10.29279743193 1.0297583 2027-Aug-29 21:00 10.29287175003 1.0292641 2027-Aug-30 00:00 10.29294603245 1.0287699 $$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 ******************************************************************************* !$$SOF COMMAND = '90000170' START_TIME = '2027-Aug-20' STOP_TIME = '2027-Aug-30' STEP_SIZE = '3 hours' QUANTITIES = '19'