******************************************************************************* JPL/HORIZONS 111P/Helin-Roman-Crockett 2024-Apr-25 13:33:09 Rec #:90000988 (+COV) Soln.date: 2013-Jan-28_09:17:54 # obs: 137 (1989-2012) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456320.5 ! 2013-Jan-28.0000000 (TDB) RMSW= n.a. EC= .1096207704078609 QR= 3.704303387230362 TP= 2456323.129239941 OM= 89.79399820609125 W= 3.37794152502789 IN= 4.228807042165645 A= 4.160365902658368 MA= 359.6946225231659 ADIST= 4.616428418086374 PER= 8.486048211602901 N= .116146675 ANGMOM= .034875625 DAN= 3.70494 DDN= 4.61544 L= 93.1627646 B= .2489446 MOID= 2.72098994 TP= 2013-Jan-30.6292399410 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .600 M1= 8.4 M2= 17.2 k1= 17. k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 0. A2= -1.134125328064E-7 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#8, data arc: 1989-01-03 to 2012-12-21 2: k1=17., k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu Apr 25 13:33:09 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 111P/Helin-Roman-Crockett {source: JPL#8} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2029-Dec-01 00:00:00.0000 UT Stop time : A.D. 2029-Dec-19 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 0.6 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= 2456320.5 ! 2013-Jan-28.0000000 (TDB) RMSW= n.a. EC= .1096207704078609 QR= 3.704303387230362 TP= 2456323.129239941 OM= 89.79399820609125 W= 3.37794152502789 IN= 4.228807042165645 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.797214510483343E-01 Y= 3.388934601357918E+00 Z= 1.484838909654746E+00 VX=-9.377823160973332E-03 VY=-7.018659336056387E-04 VZ= 4.513338009395160E-04 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .600 M1= 8.4 M2= 17.2 k1= 17. k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 0. A2= -1.134125328064E-7 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2029-Dec-01 00:00 3.711116655598 -0.0328148 2029-Dec-01 03:00 3.711114304254 -0.0323225 2029-Dec-01 06:00 3.711111988457 -0.0318301 2029-Dec-01 09:00 3.711109708208 -0.0313377 2029-Dec-01 12:00 3.711107463507 -0.0308454 2029-Dec-01 15:00 3.711105254354 -0.0303530 2029-Dec-01 18:00 3.711103080750 -0.0298606 2029-Dec-01 21:00 3.711100942693 -0.0293682 2029-Dec-02 00:00 3.711098840184 -0.0288759 2029-Dec-02 03:00 3.711096773224 -0.0283835 2029-Dec-02 06:00 3.711094741812 -0.0278911 2029-Dec-02 09:00 3.711092745949 -0.0273987 2029-Dec-02 12:00 3.711090785634 -0.0269063 2029-Dec-02 15:00 3.711088860868 -0.0264140 2029-Dec-02 18:00 3.711086971651 -0.0259216 2029-Dec-02 21:00 3.711085117982 -0.0254292 2029-Dec-03 00:00 3.711083299862 -0.0249368 2029-Dec-03 03:00 3.711081517291 -0.0244444 2029-Dec-03 06:00 3.711079770269 -0.0239520 2029-Dec-03 09:00 3.711078058795 -0.0234596 2029-Dec-03 12:00 3.711076382871 -0.0229673 2029-Dec-03 15:00 3.711074742496 -0.0224749 2029-Dec-03 18:00 3.711073137670 -0.0219825 2029-Dec-03 21:00 3.711071568392 -0.0214901 2029-Dec-04 00:00 3.711070034664 -0.0209977 2029-Dec-04 03:00 3.711068536485 -0.0205053 2029-Dec-04 06:00 3.711067073855 -0.0200129 2029-Dec-04 09:00 3.711065646775 -0.0195205 2029-Dec-04 12:00 3.711064255243 -0.0190281 2029-Dec-04 15:00 3.711062899260 -0.0185357 2029-Dec-04 18:00 3.711061578827 -0.0180433 2029-Dec-04 21:00 3.711060293942 -0.0175509 2029-Dec-05 00:00 3.711059044607 -0.0170586 2029-Dec-05 03:00 3.711057830821 -0.0165662 2029-Dec-05 06:00 3.711056652584 -0.0160738 2029-Dec-05 09:00 3.711055509895 -0.0155814 2029-Dec-05 12:00 3.711054402756 -0.0150890 2029-Dec-05 15:00 3.711053331166 -0.0145966 2029-Dec-05 18:00 3.711052295124 -0.0141042 2029-Dec-05 21:00 3.711051294632 -0.0136118 2029-Dec-06 00:00 3.711050329688 -0.0131194 2029-Dec-06 03:00 3.711049400293 -0.0126270 2029-Dec-06 06:00 3.711048506447 -0.0121346 2029-Dec-06 09:00 3.711047648149 -0.0116423 2029-Dec-06 12:00 3.711046825400 -0.0111499 2029-Dec-06 15:00 3.711046038199 -0.0106575 2029-Dec-06 18:00 3.711045286547 -0.0101651 2029-Dec-06 21:00 3.711044570443 -0.0096727 2029-Dec-07 00:00 3.711043889887 -0.0091803 2029-Dec-07 03:00 3.711043244879 -0.0086879 2029-Dec-07 06:00 3.711042635420 -0.0081956 2029-Dec-07 09:00 3.711042061508 -0.0077032 2029-Dec-07 12:00 3.711041523144 -0.0072108 2029-Dec-07 15:00 3.711041020328 -0.0067184 2029-Dec-07 18:00 3.711040553059 -0.0062261 2029-Dec-07 21:00 3.711040121338 -0.0057337 2029-Dec-08 00:00 3.711039725165 -0.0052413 2029-Dec-08 03:00 3.711039364538 -0.0047489 2029-Dec-08 06:00 3.711039039459 -0.0042566 2029-Dec-08 09:00 3.711038749927 -0.0037642 2029-Dec-08 12:00 3.711038495941 -0.0032718 2029-Dec-08 15:00 3.711038277502 -0.0027795 2029-Dec-08 18:00 3.711038094610 -0.0022871 2029-Dec-08 21:00 3.711037947264 -0.0017947 2029-Dec-09 00:00 3.711037835465 -0.0013024 2029-Dec-09 03:00 3.711037759211 -0.0008100 2029-Dec-09 06:00 3.711037718503 -0.0003177 2029-Dec-09 09:00 3.711037713341 0.0001747 2029-Dec-09 12:00 3.711037743725 0.0006670 2029-Dec-09 15:00 3.711037809654 0.0011594 2029-Dec-09 18:00 3.711037911128 0.0016517 2029-Dec-09 21:00 3.711038048147 0.0021441 2029-Dec-10 00:00 3.711038220711 0.0026364 2029-Dec-10 03:00 3.711038428819 0.0031287 2029-Dec-10 06:00 3.711038672472 0.0036211 2029-Dec-10 09:00 3.711038951669 0.0041134 2029-Dec-10 12:00 3.711039266410 0.0046057 2029-Dec-10 15:00 3.711039616694 0.0050981 2029-Dec-10 18:00 3.711040002522 0.0055904 2029-Dec-10 21:00 3.711040423894 0.0060827 2029-Dec-11 00:00 3.711040880808 0.0065750 2029-Dec-11 03:00 3.711041373265 0.0070673 2029-Dec-11 06:00 3.711041901265 0.0075596 2029-Dec-11 09:00 3.711042464807 0.0080520 2029-Dec-11 12:00 3.711043063892 0.0085443 2029-Dec-11 15:00 3.711043698518 0.0090366 2029-Dec-11 18:00 3.711044368685 0.0095289 2029-Dec-11 21:00 3.711045074394 0.0100211 2029-Dec-12 00:00 3.711045815644 0.0105134 2029-Dec-12 03:00 3.711046592434 0.0110057 2029-Dec-12 06:00 3.711047404765 0.0114980 2029-Dec-12 09:00 3.711048252636 0.0119903 2029-Dec-12 12:00 3.711049136048 0.0124826 2029-Dec-12 15:00 3.711050054998 0.0129748 2029-Dec-12 18:00 3.711051009488 0.0134671 2029-Dec-12 21:00 3.711051999517 0.0139594 2029-Dec-13 00:00 3.711053025084 0.0144516 2029-Dec-13 03:00 3.711054086190 0.0149439 2029-Dec-13 06:00 3.711055182834 0.0154361 2029-Dec-13 09:00 3.711056315016 0.0159284 2029-Dec-13 12:00 3.711057482735 0.0164206 2029-Dec-13 15:00 3.711058685991 0.0169129 2029-Dec-13 18:00 3.711059924784 0.0174051 2029-Dec-13 21:00 3.711061199113 0.0178973 2029-Dec-14 00:00 3.711062508978 0.0183895 2029-Dec-14 03:00 3.711063854379 0.0188818 2029-Dec-14 06:00 3.711065235316 0.0193740 2029-Dec-14 09:00 3.711066651787 0.0198662 2029-Dec-14 12:00 3.711068103792 0.0203584 2029-Dec-14 15:00 3.711069591332 0.0208506 2029-Dec-14 18:00 3.711071114406 0.0213428 2029-Dec-14 21:00 3.711072673013 0.0218350 2029-Dec-15 00:00 3.711074267154 0.0223272 2029-Dec-15 03:00 3.711075896827 0.0228193 2029-Dec-15 06:00 3.711077562032 0.0233115 2029-Dec-15 09:00 3.711079262769 0.0238037 2029-Dec-15 12:00 3.711080999038 0.0242958 2029-Dec-15 15:00 3.711082770838 0.0247880 2029-Dec-15 18:00 3.711084578168 0.0252802 2029-Dec-15 21:00 3.711086421029 0.0257723 2029-Dec-16 00:00 3.711088299420 0.0262644 2029-Dec-16 03:00 3.711090213340 0.0267566 2029-Dec-16 06:00 3.711092162788 0.0272487 2029-Dec-16 09:00 3.711094147766 0.0277408 2029-Dec-16 12:00 3.711096168271 0.0282330 2029-Dec-16 15:00 3.711098224305 0.0287251 2029-Dec-16 18:00 3.711100315865 0.0292172 2029-Dec-16 21:00 3.711102442952 0.0297093 2029-Dec-17 00:00 3.711104605565 0.0302014 2029-Dec-17 03:00 3.711106803704 0.0306935 2029-Dec-17 06:00 3.711109037369 0.0311855 2029-Dec-17 09:00 3.711111306558 0.0316776 2029-Dec-17 12:00 3.711113611272 0.0321697 2029-Dec-17 15:00 3.711115951509 0.0326617 2029-Dec-17 18:00 3.711118327270 0.0331538 2029-Dec-17 21:00 3.711120738554 0.0336458 2029-Dec-18 00:00 3.711123185360 0.0341379 2029-Dec-18 03:00 3.711125667688 0.0346299 2029-Dec-18 06:00 3.711128185538 0.0351219 2029-Dec-18 09:00 3.711130738908 0.0356140 2029-Dec-18 12:00 3.711133327799 0.0361060 2029-Dec-18 15:00 3.711135952209 0.0365980 2029-Dec-18 18:00 3.711138612139 0.0370900 2029-Dec-18 21:00 3.711141307588 0.0375820 2029-Dec-19 00:00 3.711144038555 0.0380740 $$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 = '111P' START_TIME = '2029-Dec-01' STOP_TIME = '2029-Dec-19' STEP_SIZE = '3 hours' QUANTITIES = '19'