******************************************************************************* JPL/HORIZONS 177P/Barnard 2024-May-05 08:00:47 Rec #:90001118 (+COV) Soln.date: 2021-Apr-15_23:27:46 # obs: 1702 (1889-2006) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2453849.5 ! 2006-Apr-24.0000000 (TDB) RMSW= n.a. EC= .9544420406209868 QR= 1.107271122596795 TP= 2453976.18324182 OM= 272.0677211344989 W= 60.45355083971904 IN= 31.21645855446403 A= 24.3046689906588 MA= 358.9579497161305 ADIST= 47.5020668587208 PER= 119.82371170863 N= .008225636 ANGMOM= .025305786 DAN= 1.47151 DDN= 4.08832 L= 328.5309928 B= 26.799808 MOID= .31019101 TP= 2006-Aug-28.6832418200 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 15.7 M2= 18.3 k1= 13. k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#29, data arc: 1889-06-24 to 2006-12-11 2: k1=13., k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun May 5 08:00:48 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 177P/Barnard {source: JPL#29} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2127-Apr-11 00:00:00.0000 UT Stop time : A.D. 2127-Apr-15 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= 2453849.5 ! 2006-Apr-24.0000000 (TDB) RMSW= n.a. EC= .9544420406209868 QR= 1.107271122596795 TP= 2453976.18324182 OM= 272.0677211344989 W= 60.45355083971904 IN= 31.21645855446403 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-8.420413536997813E-01 Y=-1.536265166614096E+00 Z=-1.267481101002943E+00 VX= 1.325968354504323E-02 VY= 8.343633636537394E-04 VZ= 9.219956464834218E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 15.7 M2= 18.3 k1= 13. k2= 5. PHCOF= .030 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2127-Apr-11 00:00 1.121639964058 -1.1054524 2127-Apr-11 03:00 1.121561910717 -1.0568884 2127-Apr-11 06:00 1.121487363866 -1.0083112 2127-Apr-11 09:00 1.121416324445 -0.9597211 2127-Apr-11 12:00 1.121348793352 -0.9111190 2127-Apr-11 15:00 1.121284771438 -0.8625053 2127-Apr-11 18:00 1.121224259514 -0.8138807 2127-Apr-11 21:00 1.121167258341 -0.7652458 2127-Apr-12 00:00 1.121113768642 -0.7166013 2127-Apr-12 03:00 1.121063791090 -0.6679476 2127-Apr-12 06:00 1.121017326317 -0.6192855 2127-Apr-12 09:00 1.120974374910 -0.5706156 2127-Apr-12 12:00 1.120934937410 -0.5219384 2127-Apr-12 15:00 1.120899014316 -0.4732547 2127-Apr-12 18:00 1.120866606081 -0.4245650 2127-Apr-12 21:00 1.120837713113 -0.3758698 2127-Apr-13 00:00 1.120812335777 -0.3271700 2127-Apr-13 03:00 1.120790474392 -0.2784660 2127-Apr-13 06:00 1.120772129232 -0.2297585 2127-Apr-13 09:00 1.120757300529 -0.1810480 2127-Apr-13 12:00 1.120745988468 -0.1323353 2127-Apr-13 15:00 1.120738193189 -0.0836210 2127-Apr-13 18:00 1.120733914790 -0.0349056 2127-Apr-13 21:00 1.120733153321 0.0138103 2127-Apr-14 00:00 1.120735908791 0.0625259 2127-Apr-14 03:00 1.120742181161 0.1112407 2127-Apr-14 06:00 1.120751970350 0.1599541 2127-Apr-14 09:00 1.120765276230 0.2086655 2127-Apr-14 12:00 1.120782098630 0.2573741 2127-Apr-14 15:00 1.120802437333 0.3060795 2127-Apr-14 18:00 1.120826292080 0.3547810 2127-Apr-14 21:00 1.120853662564 0.4034780 2127-Apr-15 00:00 1.120884548435 0.4521698 $$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 = '177P' START_TIME = '2127-Apr-11' STOP_TIME = '2127-Apr-15' STEP_SIZE = '3 hours' QUANTITIES = '19'