API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS Hale-Bopp (C/1995 O1) 2026-Sep-05 01:58:53 Rec #:90002256 (+COV) Soln.date: 2022-Aug-01_01:56:46 # obs: 66 (1993-2022) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459837.5 ! 2022-Sep-15.0000000 (TDB) RMSW= n.a. EC= .9949810027633206 QR= .890537663547794 TP= 2450537.1349071441 OM= 282.7334213961641 W= 130.4146670659176 IN= 89.28759424740302 A= 177.4333839117583 MA= 3.878386339423163 ADIST= 353.9762301599687 PER= 2363.53046814286 N= .000417014 ANGMOM= .02292857 DAN= 5.00538 DDN= 1.07996 L= 101.8968625 B= 49.580132 MOID= .0878151 TP= 1997-Mar-29.6349071441 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 30. M1= 4.8 M2= n.a. k1= 4. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#226, data arc: 1993-04-27 to 2022-07-09 2: k1=4.; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sat Sep 5 01:58:53 2026 Pasadena, USA / Horizons ******************************************************************************* Target body name: Hale-Bopp (C/1995 O1) {source: JPL#226} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2026-Jul-23 00:00:00.0000 UT Stop time : A.D. 2026-Jul-24 00:00:00.0000 UT Step-size : 1440 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 30. km 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.260904.p261201 EOP coverage : DATA-BASED 1962-JAN-20 TO 2026-SEP-04. PREDICTS-> 2026-NOV-30 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= 2459837.5 ! 2022-Sep-15.0000000 (TDB) RMSW= n.a. EC= .9949810027633206 QR= .890537663547794 TP= 2450537.1349071441 OM= 282.7334213961641 W= 130.4146670659176 IN= 89.28759424740302 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 3.907631452214869E+00 Y=-1.373895334060347E+00 Z=-4.624358508575312E+01 VX= 3.778244409519935E-04 VY=-5.803173067116371E-04 VZ=-3.255716412104052E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 30. M1= 4.8 M2= n.a. k1= 4. k2= n.a. PHCOF= n.a. ********************************************************************************************* Date__(UT)__HR:MN R.A._____(ICRF)_____DEC T-mag N-mag delta deldot ********************************************************************************************* $$SOE 2026-Jul-23 00:00 22 42 10.11 -85 17 07.5 20.145 n.a. 50.5190312470386 9.6339760 2026-Jul-24 00:00 22 41 27.80 -85 17 52.6 20.146 n.a. 50.5246555630894 9.8426697 $$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.A._____(ICRF)_____DEC' = Astrometric right ascension and declination of the target center with respect to the observing site (coordinate origin) in the reference frame of the planetary ephemeris (ICRF). Compensated for down-leg light-time delay aberration. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'T-mag N-mag' = Comets' apparent visual total magnitude ("T-mag") and nuclear magnitude ("N-mag") using the standard IAU model: T-mag= M1 + 5*log10(delta) + k1*log10(r) N-mag= M2 + 5*log10(delta) + k2*log10(r) + phcof*beta Units: MAGNITUDES '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 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 Inquiries : Jon.D.Giorgini@jpl.nasa.gov *********************************************************************************************