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

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JPL/HORIZONS              99942 Apophis (2004 MN4)         2026-Jun-24 15:52:09
Rec #:   99942 (+COV) Soln.date: 2024-Jun-25_10:48:08   # obs: 7370 (2004-2022)
 
IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs):
 
  EPOCH=  2459215.5 ! 2021-Jan-01.00 (TDB)         Residual RMS= .080135
   EC= .1915216893501022   QR= .7458270478466523   TP= 2459101.0394224627
   OM= 204.0389272089208   W=  126.6520518368553   IN= 3.336751320066756
   A= .9225071817289903    MA= 127.3225632013606   ADIST= 1.099187315611328
   PER= .88606             N= 1.112370442          ANGMOM= .016216289
   DAN= 1.00339            DDN= .79749             L= 330.7375495
   B= 2.6764541            MOID= .0003822          TP= 2020-Sep-08.5394224627
 
Asteroid physical parameters (km, seconds, rotational period in hours):
   GM= n.a.                RAD= .170               ROTPER= 30.56
   H= 19.09                G= .240                 B-V= n.a.
                           ALBEDO= .350            STYP= Sq

Non-default Earth gravity model (EOBL_LIM= au):
   EOBL_LIM= 1.000                                 EOBL_MOD = 2x0 (J2 only)
Asteroid non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au):
   AMRAT=  0.
   A1= 4.999999873689E-13  A2= -2.901766720242E-14 A3= 0.
 Non-standard or simulated/proxy model:
   ALN=  1.            NK=  0.       NM=  2.       NN=  5.093    R0=  1.

ASTEROID comments: 
1: soln ref.= JPL#220, PHA  OCC=0       radar(20 delay,30 Dop.)
2: source=ORB
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