******************************************************************************* JPL/HORIZONS 178P/Hug-Bell 2025-Dec-12 17:51:50 Rec #:90001122 (+COV) Soln.date: 2024-Aug-25_21:12:14 # obs: 1037 (1999-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456254.5 ! 2012-Nov-23.0000000 (TDB) RMSW= n.a. EC= .4729905268795269 QR= 1.933837907163 TP= 2456496.5165589135 OM= 103.5748827823668 W= 296.9466476867177 IN= 10.97530649937434 A= 3.669455684947297 MA= 326.0650913249249 ADIST= 5.405073462731595 PER= 7.0292772483908 N= .140217301 ANGMOM= .029032969 DAN= 2.34574 DDN= 3.62565 L= 40.9511081 B= -9.7712781 MOID= .97065699 TP= 2013-Jul-23.0165589135 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 13.2 M2= 15.9 k1= 11.25 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= -1.658481359482E-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#51, data arc: 1999-10-10 to 2021-03-17 2: k1=11.25, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:51:50 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 178P/Hug-Bell {source: JPL#51} 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.251212.p260310 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-DEC-12. PREDICTS-> 2026-MAR-09 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= 2456254.5 ! 2012-Nov-23.0000000 (TDB) RMSW= n.a. EC= .4729905268795269 QR= 1.933837907163 TP= 2456496.5165589135 OM= 103.5748827823668 W= 296.9466476867177 IN= 10.97530649937434 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.944673493834528E+00 Y=-1.603872019785640E+00 Z=-1.002151947955906E+00 VX= 3.757557307845762E-03 VY= 1.061332139792748E-02 VZ= 3.281501093468727E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 13.2 M2= 15.9 k1= 11.25 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= -1.658481359482E-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 1.881917791728 -0.2525641 2027-Jun-18 03:00 1.881899872173 -0.2438544 2027-Jun-18 06:00 1.881882581430 -0.2351443 2027-Jun-18 09:00 1.881865919528 -0.2264338 2027-Jun-18 12:00 1.881849886496 -0.2177230 2027-Jun-18 15:00 1.881834482360 -0.2090118 2027-Jun-18 18:00 1.881819707146 -0.2003002 2027-Jun-18 21:00 1.881805560879 -0.1915883 2027-Jun-19 00:00 1.881792043583 -0.1828761 2027-Jun-19 03:00 1.881779155281 -0.1741635 2027-Jun-19 06:00 1.881766895994 -0.1654507 2027-Jun-19 09:00 1.881755265743 -0.1567376 2027-Jun-19 12:00 1.881744264548 -0.1480242 2027-Jun-19 15:00 1.881733892426 -0.1393106 2027-Jun-19 18:00 1.881724149396 -0.1305967 2027-Jun-19 21:00 1.881715035474 -0.1218827 2027-Jun-20 00:00 1.881706550675 -0.1131684 2027-Jun-20 03:00 1.881698695012 -0.1044539 2027-Jun-20 06:00 1.881691468501 -0.0957393 2027-Jun-20 09:00 1.881684871151 -0.0870245 2027-Jun-20 12:00 1.881678902975 -0.0783095 2027-Jun-20 15:00 1.881673563982 -0.0695945 2027-Jun-20 18:00 1.881668854182 -0.0608793 2027-Jun-20 21:00 1.881664773581 -0.0521640 2027-Jun-21 00:00 1.881661322188 -0.0434486 2027-Jun-21 03:00 1.881658500007 -0.0347332 2027-Jun-21 06:00 1.881656307042 -0.0260177 2027-Jun-21 09:00 1.881654743299 -0.0173021 2027-Jun-21 12:00 1.881653808778 -0.0085865 2027-Jun-21 15:00 1.881653503482 0.0001290 2027-Jun-21 18:00 1.881653827411 0.0088446 2027-Jun-21 21:00 1.881654780563 0.0175602 2027-Jun-22 00:00 1.881656362938 0.0262757 2027-Jun-22 03:00 1.881658574532 0.0349912 2027-Jun-22 06:00 1.881661415342 0.0437066 2027-Jun-22 09:00 1.881664885362 0.0524220 2027-Jun-22 12:00 1.881668984586 0.0611372 2027-Jun-22 15:00 1.881673713008 0.0698524 2027-Jun-22 18:00 1.881679070618 0.0785674 2027-Jun-22 21:00 1.881685057409 0.0872823 2027-Jun-23 00:00 1.881691673368 0.0959970 2027-Jun-23 03:00 1.881698918486 0.1047116 2027-Jun-23 06:00 1.881706792749 0.1134260 2027-Jun-23 09:00 1.881715296144 0.1221402 2027-Jun-23 12:00 1.881724428656 0.1308542 2027-Jun-23 15:00 1.881734190270 0.1395679 2027-Jun-23 18:00 1.881744580969 0.1482815 2027-Jun-23 21:00 1.881755600735 0.1569947 2027-Jun-24 00:00 1.881767249549 0.1657077 $$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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '178P' QUANTITIES = '19' START_TIME = '2027-Jun-18' STEP_SIZE = '3 hours' STOP_TIME = '2027-Jun-24'