******************************************************************************* JPL/HORIZONS 178P/Hug-Bell 2024-May-06 03:26:55 Rec #:90001119 (+COV) Soln.date: 2021-Apr-15_23:27:46 # obs: 1034 (1999-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456251.5 ! 2012-Nov-20.0000000 (TDB) RMSW= n.a. EC= .4729919523404931 QR= 1.933842804541083 TP= 2456496.5157691031 OM= 103.5748531955486 W= 296.9463255581147 IN= 10.97529382676345 A= 3.669474902953501 MA= 325.6448200596259 ADIST= 5.405107001365918 PER= 7.0293324700158 N= .140216199 ANGMOM= .02903302 DAN= 2.34575 DDN= 3.62565 L= 40.9507519 B= -9.7712951 MOID= .97062701 TP= 2013-Jul-23.0157691031 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 13.6 M2= 15.9 k1= 10. 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= -1.6651943326E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#50, data arc: 1999-10-10 to 2021-03-17 2: k1=10., k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Mon May 6 03:26:55 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 178P/Hug-Bell {source: JPL#50} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2027-Jun-18 00:00:00.0000 UT Stop time : A.D. 2027-Jun-24 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= 2456251.5 ! 2012-Nov-20.0000000 (TDB) RMSW= n.a. EC= .4729919523404931 QR= 1.933842804541083 TP= 2456496.5157691031 OM= 103.5748531955486 W= 296.9463255581147 IN= 10.97529382676345 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.933273940360285E+00 Y=-1.635603906939782E+00 Z=-1.011929654638236E+00 VX= 3.843112034874348E-03 VY= 1.054187016443714E-02 VZ= 3.237076006219677E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 13.6 M2= 15.9 k1= 10. 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= -1.6651943326E-10 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 2027-Jun-18 00:00 1.881918312596 -0.2525775 2027-Jun-18 03:00 1.881900392069 -0.2438679 2027-Jun-18 06:00 1.881883100354 -0.2351578 2027-Jun-18 09:00 1.881866437479 -0.2264473 2027-Jun-18 12:00 1.881850403473 -0.2177365 2027-Jun-18 15:00 1.881834998363 -0.2090253 2027-Jun-18 18:00 1.881820222174 -0.2003137 2027-Jun-18 21:00 1.881806074932 -0.1916018 2027-Jun-19 00:00 1.881792556661 -0.1828896 2027-Jun-19 03:00 1.881779667382 -0.1741771 2027-Jun-19 06:00 1.881767407119 -0.1654642 2027-Jun-19 09:00 1.881755775890 -0.1567511 2027-Jun-19 12:00 1.881744773717 -0.1480378 2027-Jun-19 15:00 1.881734400617 -0.1393242 2027-Jun-19 18:00 1.881724656608 -0.1306103 2027-Jun-19 21:00 1.881715541706 -0.1218962 2027-Jun-20 00:00 1.881707055927 -0.1131820 2027-Jun-20 03:00 1.881699199284 -0.1044675 2027-Jun-20 06:00 1.881691971791 -0.0957529 2027-Jun-20 09:00 1.881685373460 -0.0870381 2027-Jun-20 12:00 1.881679404302 -0.0783232 2027-Jun-20 15:00 1.881674064327 -0.0696081 2027-Jun-20 18:00 1.881669353544 -0.0608929 2027-Jun-20 21:00 1.881665271959 -0.0521776 2027-Jun-21 00:00 1.881661819582 -0.0434622 2027-Jun-21 03:00 1.881658996416 -0.0347468 2027-Jun-21 06:00 1.881656802467 -0.0260313 2027-Jun-21 09:00 1.881655237737 -0.0173158 2027-Jun-21 12:00 1.881654302231 -0.0086002 2027-Jun-21 15:00 1.881653995948 0.0001154 2027-Jun-21 18:00 1.881654318889 0.0088309 2027-Jun-21 21:00 1.881655271054 0.0175465 2027-Jun-22 00:00 1.881656852441 0.0262620 2027-Jun-22 03:00 1.881659063047 0.0349775 2027-Jun-22 06:00 1.881661902867 0.0436929 2027-Jun-22 09:00 1.881665371898 0.0524083 2027-Jun-22 12:00 1.881669470132 0.0611235 2027-Jun-22 15:00 1.881674197563 0.0698386 2027-Jun-22 18:00 1.881679554182 0.0785537 2027-Jun-22 21:00 1.881685539981 0.0872686 2027-Jun-23 00:00 1.881692154949 0.0959833 2027-Jun-23 03:00 1.881699399074 0.1046979 2027-Jun-23 06:00 1.881707272344 0.1134122 2027-Jun-23 09:00 1.881715774745 0.1221264 2027-Jun-23 12:00 1.881724906264 0.1308404 2027-Jun-23 15:00 1.881734666883 0.1395542 2027-Jun-23 18:00 1.881745056587 0.1482677 2027-Jun-23 21:00 1.881756075357 0.1569809 2027-Jun-24 00:00 1.881767723176 0.1656939 $$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 = '178P' START_TIME = '2027-Jun-18' STOP_TIME = '2027-Jun-24' STEP_SIZE = '3 hours' QUANTITIES = '19'