API VERSION: 1.2
API SOURCE: NASA/JPL Horizons API

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JPL/HORIZONS                     13P/Olbers                2026-Jul-17 23:53:55
Rec #:90000227 (+COV) Soln.date: 2026-Mar-12_09:29:25   # obs: 2481 (1887-2025)
 
IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs):
 
  EPOCH=  2459122.5 ! 2020-Sep-30.0000000 (TDB)    RMSW= n.a.
   EC= .9297099851338464   QR= 1.17257262564037    TP= 2460492.2360930154
   OM= 85.86269108499772   W= 64.52834113777597    IN= 44.62481228001234
   A= 16.68192314190266    MA= 340.1860163773172   ADIST= 32.19127365816495
   PER= 68.13611640473     N= .014465548           ANGMOM= .025876012
   DAN= 1.61642            DDN= 3.77017            L= 142.0675719
   B= 39.3592505           MOID= .47070101         TP= 2024-Jun-30.7360930154
 
Comet physical (GM= km^3/s^2; RAD= km):
   GM= n.a.                RAD= n.a.
   M1=  6.9      M2=  n.a.     k1=  18.    k2= n.a.     PHCOF= n.a.
Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au):
   AMRAT=  0.                                      DT=  0.
   A1= 3.86165946722E-9    A2= 5.903186649084E-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#73, data arc: 1887-08-27 to 2025-07-31
2: k1=18.;
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Bad dates -- start must be earlier than stop