******************************************************************************* JPL/HORIZONS Great southern comet (C/1887 B1) 2024-May-07 10:30:15 Rec #:90001763 Soln.date: - # obs: 15 (8 days) IAU76/J2000 helio. eclip. TWO-BODY elements (au, days, deg., period=Julian yrs) EPOCH= 2410283.434 ! 1887-Jan-11.9340000 (TDB) RMSW= n.a. EC= 1. QR= .00483 TP= 2410283.4339999999 OM= 4.585 W= 83.51300000000001 IN= 144.383 A= 9.999999E99 ADIST= 9.999999E99 PER= 9.999999E99 ANGMOM= .001690713 DAN= .00868 DDN= .01089 L= 282.5474112 B= 35.3546364 TP= 1887-Jan-11.9339999999 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= n.a. M2= n.a. k1= n.a. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= SAO_2008, data arc: 1887-01-21 to 1887-01-29 2: ; TWO_BODY;time units are UT, but set to ET; original epoch not defined, assumed ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Tue May 7 10:30:15 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Great southern comet (C/1887 B1) {source: SAO_200820} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1886-Dec-22 21:00:00.0000 UT Stop time : A.D. 1886-Dec-23 00:00:00.0000 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.240506.p240730 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-06. PREDICTS-> 2024-JUL-29 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 TWO-BODY elements (au, days, deg.): EPOCH= 2410283.434 ! 1887-Jan-11.9340000 (TDB) RMSW= n.a. EC= 1. QR= .00483 TP= 2410283.4339999999 OM= 4.585 W= 83.51300000000001 IN= 144.383 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 8.557986733084340E-04 Y=-4.639611519639444E-03 Z= 1.034656260596968E-03 VX=-3.441200833839362E-01 VY=-6.407138167172184E-02 VZ=-2.676073579930761E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= n.a. M2= n.a. k1= n.a. k2= n.a. PHCOF= n.a. ***************************************************************************************************************************** Date__(UT)__HR:MN:SC.fff r rdot delta deldot VmagSn VmagOb S-O-T /r ***************************************************************************************************************************** $$SOE 1886-Dec-22 21:00:00.000 0.807771653173 -46.7664558 0.57269066983561 -0.1415897 46.9066648 57.3864232 55.2061 /T 1886-Dec-22 21:03:00.000 0.807715381572 -46.7680723 0.57269050323922 -0.1353259 46.9082960 57.3870116 55.2004 /T 1886-Dec-22 21:06:00.000 0.807659108027 -46.7696890 0.57269034417970 -0.1290620 46.9099273 57.3876002 55.1948 /T 1886-Dec-22 21:09:00.000 0.807602832537 -46.7713058 0.57269019265729 -0.1227978 46.9115589 57.3881890 55.1892 /T 1886-Dec-22 21:12:00.000 0.807546555104 -46.7729230 0.57269004867226 -0.1165334 46.9131907 57.3887779 55.1836 /T 1886-Dec-22 21:15:00.000 0.807490275725 -46.7745403 0.57268991222487 -0.1102688 46.9148227 57.3893670 55.1780 /T 1886-Dec-22 21:18:00.000 0.807433994401 -46.7761579 0.57268978331535 -0.1040039 46.9164550 57.3899562 55.1723 /T 1886-Dec-22 21:21:00.000 0.807377711133 -46.7777757 0.57268966194398 -0.0977389 46.9180875 57.3905456 55.1667 /T 1886-Dec-22 21:24:00.000 0.807321425918 -46.7793937 0.57268954811101 -0.0914737 46.9197202 57.3911352 55.1611 /T 1886-Dec-22 21:27:00.000 0.807265138758 -46.7810119 0.57268944181669 -0.0852082 46.9213531 57.3917249 55.1555 /T 1886-Dec-22 21:30:00.000 0.807208849652 -46.7826304 0.57268934306128 -0.0789425 46.9229863 57.3923148 55.1498 /T 1886-Dec-22 21:33:00.000 0.807152558599 -46.7842491 0.57268925184502 -0.0726766 46.9246197 57.3929048 55.1442 /T 1886-Dec-22 21:36:00.000 0.807096265600 -46.7858680 0.57268916816819 -0.0664105 46.9262533 57.3934951 55.1386 /T 1886-Dec-22 21:39:00.000 0.807039970654 -46.7874871 0.57268909203102 -0.0601442 46.9278872 57.3940854 55.1330 /T 1886-Dec-22 21:42:00.000 0.806983673761 -46.7891065 0.57268902343378 -0.0538777 46.9295212 57.3946760 55.1273 /T 1886-Dec-22 21:45:00.000 0.806927374920 -46.7907261 0.57268896237671 -0.0476110 46.9311556 57.3952667 55.1217 /T 1886-Dec-22 21:48:00.000 0.806871074132 -46.7923459 0.57268890886008 -0.0413441 46.9327901 57.3958576 55.1161 /T 1886-Dec-22 21:51:00.000 0.806814771396 -46.7939659 0.57268886288413 -0.0350769 46.9344249 57.3964486 55.1105 /T 1886-Dec-22 21:54:00.000 0.806758466711 -46.7955862 0.57268882444911 -0.0288096 46.9360598 57.3970398 55.1048 /T 1886-Dec-22 21:57:00.000 0.806702160078 -46.7972067 0.57268879355529 -0.0225420 46.9376951 57.3976312 55.0992 /T 1886-Dec-22 22:00:00.000 0.806645851496 -46.7988274 0.57268877020291 -0.0162742 46.9393305 57.3982227 55.0936 /T 1886-Dec-22 22:03:00.000 0.806589540966 -46.8004483 0.57268875439223 -0.0100062 46.9409662 57.3988144 55.0880 /T 1886-Dec-22 22:06:00.000 0.806533228486 -46.8020695 0.57268874612350 -0.0037380 46.9426021 57.3994062 55.0823 /T 1886-Dec-22 22:09:00.000 0.806476914056 -46.8036909 0.57268874539696 0.0025304 46.9442382 57.3999982 55.0767 /T 1886-Dec-22 22:12:00.000 0.806420597676 -46.8053125 0.57268875221288 0.0087990 46.9458746 57.4005904 55.0711 /T 1886-Dec-22 22:15:00.000 0.806364279347 -46.8069343 0.57268876657150 0.0150679 46.9475112 57.4011828 55.0655 /T 1886-Dec-22 22:18:00.000 0.806307959067 -46.8085564 0.57268878847308 0.0213369 46.9491480 57.4017753 55.0598 /T 1886-Dec-22 22:21:00.000 0.806251636836 -46.8101787 0.57268881791787 0.0276061 46.9507850 57.4023680 55.0542 /T 1886-Dec-22 22:24:00.000 0.806195312654 -46.8118012 0.57268885490611 0.0338756 46.9524223 57.4029608 55.0486 /T 1886-Dec-22 22:27:00.000 0.806138986521 -46.8134239 0.57268889943806 0.0401453 46.9540598 57.4035538 55.0429 /T 1886-Dec-22 22:30:00.000 0.806082658437 -46.8150469 0.57268895151397 0.0464151 46.9556975 57.4041470 55.0373 /T 1886-Dec-22 22:33:00.000 0.806026328401 -46.8166701 0.57268901113409 0.0526852 46.9573355 57.4047403 55.0317 /T 1886-Dec-22 22:36:00.000 0.805969996413 -46.8182935 0.57268907829867 0.0589555 46.9589737 57.4053338 55.0261 /T 1886-Dec-22 22:39:00.000 0.805913662473 -46.8199171 0.57268915300796 0.0652260 46.9606121 57.4059275 55.0204 /T 1886-Dec-22 22:42:00.000 0.805857326580 -46.8215410 0.57268923526222 0.0714967 46.9622507 57.4065213 55.0148 /T 1886-Dec-22 22:45:00.000 0.805800988734 -46.8231651 0.57268932506168 0.0777676 46.9638896 57.4071153 55.0092 /T 1886-Dec-22 22:48:00.000 0.805744648935 -46.8247894 0.57268942240660 0.0840387 46.9655287 57.4077094 55.0035 /T 1886-Dec-22 22:51:00.000 0.805688307183 -46.8264140 0.57268952729723 0.0903101 46.9671680 57.4083038 54.9979 /T 1886-Dec-22 22:54:00.000 0.805631963477 -46.8280387 0.57268963973382 0.0965816 46.9688076 57.4088982 54.9923 /T 1886-Dec-22 22:57:00.000 0.805575617817 -46.8296637 0.57268975971662 0.1028533 46.9704474 57.4094929 54.9867 /T 1886-Dec-22 23:00:00.000 0.805519270203 -46.8312889 0.57268988724587 0.1091253 46.9720874 57.4100877 54.9810 /T 1886-Dec-22 23:03:00.000 0.805462920634 -46.8329144 0.57269002232183 0.1153974 46.9737276 57.4106827 54.9754 /T 1886-Dec-22 23:06:00.000 0.805406569111 -46.8345401 0.57269016494474 0.1216698 46.9753681 57.4112778 54.9698 /T 1886-Dec-22 23:09:00.000 0.805350215633 -46.8361660 0.57269031511485 0.1279424 46.9770088 57.4118731 54.9641 /T 1886-Dec-22 23:12:00.000 0.805293860199 -46.8377921 0.57269047283241 0.1342152 46.9786497 57.4124686 54.9585 /T 1886-Dec-22 23:15:00.000 0.805237502810 -46.8394184 0.57269063809767 0.1404881 46.9802909 57.4130643 54.9529 /T 1886-Dec-22 23:18:00.000 0.805181143465 -46.8410450 0.57269081091087 0.1467613 46.9819323 57.4136601 54.9472 /T 1886-Dec-22 23:21:00.000 0.805124782164 -46.8426718 0.57269099127226 0.1530347 46.9835739 57.4142560 54.9416 /T 1886-Dec-22 23:24:00.000 0.805068418907 -46.8442988 0.57269117918209 0.1593083 46.9852157 57.4148522 54.9360 /T 1886-Dec-22 23:27:00.000 0.805012053693 -46.8459261 0.57269137464061 0.1655821 46.9868578 57.4154485 54.9303 /T 1886-Dec-22 23:30:00.000 0.804955686522 -46.8475536 0.57269157764805 0.1718561 46.9885001 57.4160449 54.9247 /T 1886-Dec-22 23:33:00.000 0.804899317394 -46.8491813 0.57269178820468 0.1781303 46.9901427 57.4166416 54.9191 /T 1886-Dec-22 23:36:00.000 0.804842946309 -46.8508092 0.57269200631073 0.1844047 46.9917854 57.4172384 54.9135 /T 1886-Dec-22 23:39:00.000 0.804786573265 -46.8524374 0.57269223196645 0.1906794 46.9934284 57.4178353 54.9078 /T 1886-Dec-22 23:42:00.000 0.804730198264 -46.8540658 0.57269246517209 0.1969542 46.9950717 57.4184324 54.9022 /T 1886-Dec-22 23:45:00.000 0.804673821305 -46.8556944 0.57269270592790 0.2032292 46.9967151 57.4190297 54.8966 /T 1886-Dec-22 23:48:00.000 0.804617442386 -46.8573232 0.57269295423411 0.2095045 46.9983588 57.4196272 54.8909 /T 1886-Dec-22 23:51:00.000 0.804561061510 -46.8589523 0.57269321009097 0.2157799 47.0000027 57.4202248 54.8853 /T 1886-Dec-22 23:54:00.000 0.804504678674 -46.8605816 0.57269347349873 0.2220555 47.0016469 57.4208226 54.8797 /T 1886-Dec-22 23:57:00.000 0.804448293878 -46.8622111 0.57269374445764 0.2283314 47.0032913 57.4214206 54.8740 /T 1886-Dec-23 00:00:00.000 0.804391907123 -46.8638409 0.57269402296793 0.2346074 47.0049359 57.4220187 54.8684 /T $$EOE ***************************************************************************************************************************** Column meaning: ** WARNING ** The initial state available for this object was a Keplerian two-body orbital element set, not osculating elements. This means the orbit is probably very poorly determined. Predictions for times many months or years from the epoch may not be suitable for high-accuracy applications or expectations. Since the epoch is inside or within ~30 days of the relatively short data arc, the elements (such as they are) were numerically propagated with perturbations, just as if they were osculating elements. 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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************** !$$SOF COMMAND = '1887 B1' START_TIME = '1886-Dec-22 21:00' STOP_TIME = '1886-Dec-23' STEP_SIZE = '60' QUANTITIES = '19,20,22,23'