******************************************************************************* JPL/HORIZONS 3D/Biela 2025-Dec-12 17:49:14 Rec #:90000092 Soln.date: - # obs: 1 (1772-1805) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2368320.5 ! 1772-Feb-21.0000000 (TDB) RMSW= n.a. EC= .72588 QR= .99038 TP= 2368317.1749999998 OM= 260.942 W= 213.34 IN= 17.054 A= 3.612943236538742 MA= .4772039348213744 ADIST= 6.235506473077484 PER= 6.8675196352175 N= .14351998 ANGMOM= .022489908 DAN= 4.34287 DDN= 1.06403 L= 113.1098151 B= -9.2756604 TP= 1772-Feb-17.6749999998 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 7.1 M2= n.a. k1= 10. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= SAO/1772 2: k1=10.0;epoch may be 2368321.0 (hour ambiguous: 12h/0h); time units are UT, but ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:49:14 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 3D/Biela {source: SAO/177220} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1805-Dec-09 21:40:00.0000 UT Stop time : A.D. 1805-Dec-09 22:00:00.0000 UT Step-size : 60 steps ******************************************************************************* 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= 2368320.5 ! 1772-Feb-21.0000000 (TDB) RMSW= n.a. EC= .72588 QR= .99038 TP= 2368317.1749999998 OM= 260.942 W= 213.34 IN= 17.054 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-4.490401046226649E-01 Y= 8.652988322692310E-01 Z= 1.813024168317937E-01 VX=-1.945435488708856E-02 VY=-7.362363021846847E-03 VZ=-9.069979172886683E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 7.1 M2= n.a. k1= 10. k2= n.a. PHCOF= n.a. ***************************************************************************************************************************** Date__(UT)__HR:MN:SC.fff r rdot delta deldot VmagSn VmagOb S-O-T /r ***************************************************************************************************************************** $$SOE 1805-Dec-09 21:40:00.000 0.980967799351 -10.0025020 0.04734224273544 -3.3718629 39.4972302 14.1221224 84.5266 /T 1805-Dec-09 21:40:20.000 0.980966462089 -10.0024263 0.04734179193234 -3.3713372 39.4972615 14.1221246 84.5250 /T 1805-Dec-09 21:40:40.000 0.980965124837 -10.0023506 0.04734134119951 -3.3708115 39.4972929 14.1221268 84.5234 /T 1805-Dec-09 21:41:00.000 0.980963787596 -10.0022748 0.04734089053699 -3.3702858 39.4973242 14.1221290 84.5218 /T 1805-Dec-09 21:41:20.000 0.980962450364 -10.0021991 0.04734043994470 -3.3697601 39.4973556 14.1221312 84.5202 /T 1805-Dec-09 21:41:40.000 0.980961113143 -10.0021234 0.04733998942276 -3.3692344 39.4973869 14.1221334 84.5185 /T 1805-Dec-09 21:42:00.000 0.980959775931 -10.0020476 0.04733953897107 -3.3687087 39.4974183 14.1221356 84.5169 /T 1805-Dec-09 21:42:20.000 0.980958438730 -10.0019719 0.04733908858971 -3.3681829 39.4974496 14.1221378 84.5153 /T 1805-Dec-09 21:42:40.000 0.980957101539 -10.0018961 0.04733863827862 -3.3676571 39.4974809 14.1221400 84.5137 /T 1805-Dec-09 21:43:00.000 0.980955764358 -10.0018204 0.04733818803788 -3.3671313 39.4975123 14.1221422 84.5121 /T 1805-Dec-09 21:43:20.000 0.980954427188 -10.0017447 0.04733773786743 -3.3666055 39.4975436 14.1221444 84.5105 /T 1805-Dec-09 21:43:40.000 0.980953090027 -10.0016689 0.04733728776725 -3.3660797 39.4975750 14.1221466 84.5088 /T 1805-Dec-09 21:44:00.000 0.980951752876 -10.0015932 0.04733683773740 -3.3655539 39.4976063 14.1221488 84.5072 /T 1805-Dec-09 21:44:20.000 0.980950415736 -10.0015174 0.04733638777785 -3.3650280 39.4976376 14.1221510 84.5056 /T 1805-Dec-09 21:44:40.000 0.980949078606 -10.0014417 0.04733593788863 -3.3645022 39.4976690 14.1221532 84.5040 /T 1805-Dec-09 21:45:00.000 0.980947741486 -10.0013660 0.04733548806972 -3.3639763 39.4977003 14.1221554 84.5024 /T 1805-Dec-09 21:45:20.000 0.980946404376 -10.0012902 0.04733503832113 -3.3634504 39.4977317 14.1221576 84.5007 /T 1805-Dec-09 21:45:40.000 0.980945067276 -10.0012145 0.04733458864281 -3.3629245 39.4977630 14.1221598 84.4991 /T 1805-Dec-09 21:46:00.000 0.980943730186 -10.0011387 0.04733413903487 -3.3623985 39.4977943 14.1221620 84.4975 /T 1805-Dec-09 21:46:20.000 0.980942393107 -10.0010630 0.04733368949723 -3.3618726 39.4978257 14.1221642 84.4959 /T 1805-Dec-09 21:46:40.000 0.980941056037 -10.0009872 0.04733324002993 -3.3613466 39.4978570 14.1221664 84.4943 /T 1805-Dec-09 21:47:00.000 0.980939718978 -10.0009115 0.04733279063290 -3.3608207 39.4978884 14.1221686 84.4927 /T 1805-Dec-09 21:47:20.000 0.980938381929 -10.0008358 0.04733234130627 -3.3602947 39.4979197 14.1221708 84.4910 /T 1805-Dec-09 21:47:40.000 0.980937044889 -10.0007600 0.04733189204992 -3.3597687 39.4979510 14.1221730 84.4894 /T 1805-Dec-09 21:48:00.000 0.980935707861 -10.0006843 0.04733144286395 -3.3592427 39.4979824 14.1221752 84.4878 /T 1805-Dec-09 21:48:20.000 0.980934370842 -10.0006085 0.04733099374826 -3.3587166 39.4980137 14.1221774 84.4862 /T 1805-Dec-09 21:48:40.000 0.980933033833 -10.0005328 0.04733054470293 -3.3581906 39.4980450 14.1221796 84.4846 /T 1805-Dec-09 21:49:00.000 0.980931696834 -10.0004570 0.04733009572796 -3.3576645 39.4980764 14.1221818 84.4830 /T 1805-Dec-09 21:49:20.000 0.980930359846 -10.0003813 0.04732964682333 -3.3571384 39.4981077 14.1221840 84.4813 /T 1805-Dec-09 21:49:40.000 0.980929022868 -10.0003055 0.04732919798896 -3.3566123 39.4981391 14.1221862 84.4797 /T 1805-Dec-09 21:50:00.000 0.980927685900 -10.0002298 0.04732874922505 -3.3560862 39.4981704 14.1221884 84.4781 /T 1805-Dec-09 21:50:20.000 0.980926348942 -10.0001540 0.04732830053143 -3.3555601 39.4982017 14.1221906 84.4765 /T 1805-Dec-09 21:50:40.000 0.980925011994 -10.0000783 0.04732785190814 -3.3550340 39.4982331 14.1221928 84.4749 /T 1805-Dec-09 21:51:00.000 0.980923675056 -10.0000025 0.04732740335521 -3.3545078 39.4982644 14.1221950 84.4732 /T 1805-Dec-09 21:51:20.000 0.980922338128 -9.9999268 0.04732695487265 -3.3539816 39.4982957 14.1221972 84.4716 /T 1805-Dec-09 21:51:40.000 0.980921001211 -9.9998510 0.04732650646045 -3.3534554 39.4983271 14.1221994 84.4700 /T 1805-Dec-09 21:52:00.000 0.980919664303 -9.9997753 0.04732605811862 -3.3529292 39.4983584 14.1222016 84.4684 /T 1805-Dec-09 21:52:20.000 0.980918327406 -9.9996995 0.04732560984714 -3.3524030 39.4983898 14.1222038 84.4668 /T 1805-Dec-09 21:52:40.000 0.980916990519 -9.9996238 0.04732516164598 -3.3518768 39.4984211 14.1222060 84.4652 /T 1805-Dec-09 21:53:00.000 0.980915653642 -9.9995480 0.04732471351521 -3.3513505 39.4984524 14.1222082 84.4635 /T 1805-Dec-09 21:53:20.000 0.980914316775 -9.9994723 0.04732426545482 -3.3508243 39.4984838 14.1222104 84.4619 /T 1805-Dec-09 21:53:40.000 0.980912979918 -9.9993965 0.04732381746480 -3.3502980 39.4985151 14.1222126 84.4603 /T 1805-Dec-09 21:54:00.000 0.980911643072 -9.9993208 0.04732336954508 -3.3497717 39.4985464 14.1222148 84.4587 /T 1805-Dec-09 21:54:20.000 0.980910306235 -9.9992450 0.04732292169578 -3.3492454 39.4985778 14.1222170 84.4571 /T 1805-Dec-09 21:54:40.000 0.980908969409 -9.9991692 0.04732247391689 -3.3487191 39.4986091 14.1222192 84.4554 /T 1805-Dec-09 21:55:00.000 0.980907632593 -9.9990935 0.04732202620833 -3.3481927 39.4986404 14.1222214 84.4538 /T 1805-Dec-09 21:55:20.000 0.980906295787 -9.9990177 0.04732157857015 -3.3476664 39.4986718 14.1222236 84.4522 /T 1805-Dec-09 21:55:40.000 0.980904958991 -9.9989420 0.04732113100237 -3.3471400 39.4987031 14.1222258 84.4506 /T 1805-Dec-09 21:56:00.000 0.980903622205 -9.9988662 0.04732068350496 -3.3466136 39.4987344 14.1222280 84.4490 /T 1805-Dec-09 21:56:20.000 0.980902285429 -9.9987905 0.04732023607792 -3.3460872 39.4987658 14.1222302 84.4474 /T 1805-Dec-09 21:56:40.000 0.980900948663 -9.9987147 0.04731978872126 -3.3455608 39.4987971 14.1222324 84.4457 /T 1805-Dec-09 21:57:00.000 0.980899611908 -9.9986389 0.04731934143504 -3.3450344 39.4988284 14.1222346 84.4441 /T 1805-Dec-09 21:57:20.000 0.980898275163 -9.9985632 0.04731889421918 -3.3445079 39.4988598 14.1222368 84.4425 /T 1805-Dec-09 21:57:40.000 0.980896938428 -9.9984874 0.04731844707370 -3.3439814 39.4988911 14.1222390 84.4409 /T 1805-Dec-09 21:58:00.000 0.980895601702 -9.9984117 0.04731799999857 -3.3434550 39.4989224 14.1222412 84.4393 /T 1805-Dec-09 21:58:20.000 0.980894264988 -9.9983359 0.04731755299390 -3.3429285 39.4989538 14.1222434 84.4376 /T 1805-Dec-09 21:58:40.000 0.980892928283 -9.9982601 0.04731710605964 -3.3424020 39.4989851 14.1222456 84.4360 /T 1805-Dec-09 21:59:00.000 0.980891591588 -9.9981844 0.04731665919575 -3.3418754 39.4990164 14.1222478 84.4344 /T 1805-Dec-09 21:59:20.000 0.980890254904 -9.9981086 0.04731621240229 -3.3413489 39.4990478 14.1222500 84.4328 /T 1805-Dec-09 21:59:40.000 0.980888918229 -9.9980329 0.04731576567916 -3.3408223 39.4990791 14.1222522 84.4312 /T 1805-Dec-09 22:00:00.000 0.980887581565 -9.9979571 0.04731531902650 -3.3402958 39.4991104 14.1222544 84.4296 /T $$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 '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 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: 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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************** !$$SOF COMMAND = '90000092' QUANTITIES = '19,20,22,23' START_TIME = '1805-12-09 21:40' STEP_SIZE = '60' STOP_TIME = '1805-12-09 22:00'