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

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JPL/HORIZONS                  1 Ceres (A801 AA)            2024-Sep-02 16:04:00
Rec #:       1 (+COV) Soln.date: 2021-Apr-13_11:04:44   # obs: 1075 (1995-2021)
 
IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs):
 
  EPOCH=  2458849.5 ! 2020-Jan-01.00 (TDB)         Residual RMS= .24563
   EC= .07687465013145245  QR= 2.556401146697176   TP= 2458240.1791309435
   OM= 80.3011901917491    W=  73.80896808746482   IN= 10.59127767086216
   A= 2.769289292143484    MA= 130.3159688200986   ADIST= 2.982177437589792
   PER= 4.60851            N= .213870844           ANGMOM= .028541613
   DAN= 2.69515            DDN= 2.81323            L= 153.8445987
   B= 10.1666387           MOID= 1.59231997        TP= 2018-May-01.6791309435
 
Asteroid physical parameters (km, seconds, rotational period in hours):
   GM= 62.6284             RAD= 469.7              ROTPER= 9.07417
   H= 3.34                 G= .120                 B-V= .713
                           ALBEDO= .090            STYP= C

ASTEROID comments: 
1: soln ref.= JPL#48, OCC=0           radar(60 delay, 0 Dop.)
2: source=ORB
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Ephemeris / API_USER Mon Sep  2 16:04:00 2024 Pasadena, USA      / Horizons    
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Target body name: 1 Ceres (A801 AA)               {source: JPL#48}
Center body name: Earth (399)                     {source: DE441}
Center-site name: GEOCENTRIC
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Start time      : A.D. 2024-Aug-16 00:00:00.0000 UT      
Stop  time      : A.D. 2024-Oct-15 00:00:00.0000 UT      
Step-size       : 1440 minutes
*******************************************************************************
Target pole/equ : IAU                             {East-longitude positive}
Target radii    : 487.3, 487.3, 446.0 km          {Equator_a, b, pole_c}       
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       : DEG
Time format     : BOTH
Calendar mode   : Mixed Julian/Gregorian
EOP file        : eop.240902.p241126                                           
EOP coverage    : DATA-BASED 1962-JAN-20 TO 2024-SEP-02. PREDICTS-> 2024-NOV-25
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 )                           
Table format    : Comma Separated Values (spreadsheet)
*******************************************************************************
Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.):
  EPOCH=  2458849.5 ! 2020-Jan-01.00 (TDB)         Residual RMS= .24563        
   EC= .07687465013145245  QR= 2.556401146697176   TP= 2458240.1791309435      
   OM= 80.3011901917491    W=  73.80896808746482   IN= 10.59127767086216       
  Equivalent ICRF heliocentric cartesian coordinates (au, au/d):
   X= 1.007608869613381E+00  Y=-2.390064275223502E+00  Z=-1.332124522752402E+00
  VX= 9.201724467227128E-03 VY= 3.370381135398406E-03 VZ=-2.850337057661093E-04
Asteroid physical parameters (km, seconds, rotational period in hours):        
   GM= 62.6284             RAD= 469.7              ROTPER= 9.07417             
   H= 3.34                 G= .120                 B-V= .713                   
                           ALBEDO= .090            STYP= C                     
********************************************************************************************************************************************************************************************************************************************
 Date__(UT)__HR:MN, Date_________JDUT, , , R.A._(ICRF), DEC_(ICRF),  dRA*cosD, d(DEC)/dt,    APmag,  S-brt,                r,       rdot,             delta,     deldot,     S-O-T,/r,     S-T-O,    PsAng,   PsAMV,      GlxLon,    GlxLat,
********************************************************************************************************************************************************************************************************************************************
$$SOE
 2024-Aug-16 00:00, 2460538.500000000, , ,   278.62427,  -30.91559,  -9.07628,  -1.29427,    8.161,  6.877,   2.923502437983,  0.9363365,  2.13108333791703, 18.0098740,  133.6759,/T,   14.5034,   79.132, 277.528,    3.328003,-10.250208,
 2024-Aug-17 00:00, 2460539.500000000, , ,   278.55714,  -30.92349,  -8.19537,  -1.12419,    8.181,  6.886,   2.924042154404,  0.9327665,  2.14156758454322, 18.2946213,  132.6732,/T,   14.7433,   79.412, 277.581,    3.295436,-10.201622,
 2024-Aug-18 00:00, 2460540.500000000, , ,   278.49685,  -30.93028,  -7.31382,  -0.95882,    8.200,  6.894,   2.924579805950,  0.9291873,  2.15221429009955, 18.5724724,  131.6757,/T,   14.9775,   79.680, 277.632,    3.266442,-10.157875,
 2024-Aug-19 00:00, 2460541.500000000, , ,   278.44342,  -30.93601,  -6.43236,  -0.79805,    8.220,  6.902,   2.925115387354,  0.9255990,  2.16301953036993, 18.8436353,  130.6834,/T,   15.2059,   79.937, 277.678,    3.240999,-10.118976,
 2024-Aug-20 00:00, 2460542.500000000, , ,   278.39683,  -30.94069,  -5.55150,  -0.64173,    8.239,  6.910,   2.925648893374,  0.9220016,  2.17397950692828, 19.1083328,  129.6962,/T,   15.4284,   80.185, 277.720,    3.219082,-10.084932,
 2024-Aug-21 00:00, 2460543.500000000, , ,   278.35709,  -30.94437,  -4.67158,  -0.48971,    8.258,  6.918,   2.926180318796,  0.9183952,  2.18509054651981, 19.3667695,  128.7142,/T,   15.6451,   80.422, 277.759,    3.200667,-10.055747,
 2024-Aug-22 00:00, 2460544.500000000, , ,   278.32419,  -30.94706,  -3.79275,  -0.34182,    8.278,  6.925,   2.926709658434,  0.9147799,  2.19634908007312, 19.6190963,  127.7373,/T,   15.8561,   80.650, 277.794,    3.185729,-10.031425,
 2024-Aug-23 00:00, 2460545.500000000, , ,   278.29811,  -30.94879,  -2.91506,  -0.19790,    8.296,  6.932,   2.927236907127,  0.9111555,  2.20775160402326, 19.8653867,  126.7656,/T,   16.0612,   80.869, 277.825,    3.174243,-10.011968,
 2024-Aug-24 00:00, 2460546.500000000, , ,   278.27886,  -30.94959,  -2.03858,  -0.05779,    8.315,  6.939,   2.927762059745,  0.9075223,  2.21929463337660, 20.1056327,  125.7989,/T,   16.2606,   81.079, 277.853,    3.166183, -9.997377,
 2024-Aug-25 00:00, 2460547.500000000, , ,   278.26642,  -30.94949,  -1.16342,  0.078656,    8.334,  6.946,   2.928285111184,  0.9038803,  2.23097465829085, 20.3397599,  124.8374,/T,   16.4541,   81.281, 277.876,    3.161525, -9.987656,
 2024-Aug-26 00:00, 2460548.500000000, , ,   278.26077,  -30.94851,  -0.28982,  0.211593,    8.352,  6.952,   2.928806056370,  0.9002295,  2.24278811278660, 20.5676527,  123.8809,/T,   16.6419,   81.476, 277.896,    3.160244, -9.982804,
 2024-Aug-27 00:00, 2460549.500000000, , ,   278.26192,  -30.94667,  0.581904,  0.341159,    8.371,  6.958,   2.929324890258,  0.8965699,  2.25473135834962, 20.7891793,  122.9296,/T,   16.8239,   81.662, 277.912,    3.162315, -9.982821,
 2024-Aug-28 00:00, 2460550.500000000, , ,   278.26983,  -30.94399,  1.451330,  0.467489,    8.389,  6.964,   2.929841607831,  0.8929017,  2.26680068032992, 21.0042105,  121.9833,/T,   17.0002,   81.841, 277.924,    3.167711, -9.987703,
 2024-Aug-29 00:00, 2460551.500000000, , ,   278.28449,  -30.94050,  2.317979,  0.590720,    8.407,  6.970,   2.930356204103,  0.8892248,  2.27899229295528, 21.2126304,  121.0421,/T,   17.1706,   82.013, 277.932,    3.176406, -9.997447,
 2024-Aug-30 00:00, 2460552.500000000, , ,   278.30588,  -30.93621,  3.181329,  0.710988,    8.424,  6.976,   2.930868674117,  0.8855393,  2.29130234901791, 21.4143426,  120.1059,/T,   17.3354,   82.178, 277.936,    3.188370,-10.012042,
 2024-Aug-31 00:00, 2460553.500000000, , ,   278.33396,  -30.93114,  4.040837,  0.828430,    8.442,  6.981,   2.931379012947,  0.8818453,  2.30372695157877, 21.6092717,  119.1749,/T,   17.4944,   82.336, 277.936,    3.203574,-10.031478,
 2024-Sep-01 00:00, 2460554.500000000, , ,   278.36871,  -30.92532,  4.895950,  0.943183,    8.459,  6.986,   2.931887215695,  0.8781429,  2.31626216633511, 21.7973637,  118.2488,/T,   17.6478,   82.488, 277.933,    3.221987,-10.055740,
 2024-Sep-02 00:00, 2460555.500000000, , ,   278.41008,  -30.91876,  5.746117,  1.055385,    8.477,  6.991,   2.932393277495,  0.8744320,  2.32890403414578, 21.9785865,  117.3279,/T,   17.7955,   82.633, 277.926,    3.243575,-10.084810,
 2024-Sep-03 00:00, 2460556.500000000, , ,   278.45804,  -30.91147,  6.590794,  1.165176,    8.494,  6.996,   2.932897193508,  0.8707127,  2.34164858355722, 22.1529295,  116.4119,/T,   17.9376,   82.772, 277.914,    3.268305,-10.118667,
 2024-Sep-04 00:00, 2460557.500000000, , ,   278.51253,  -30.90347,  7.429456,  1.272696,    8.511,  7.001,   2.933398958925,  0.8669851,  2.35449184317403, 22.3204035,  115.5010,/T,   18.0741,   82.906, 277.900,    3.296143,-10.157285,
 2024-Sep-05 00:00, 2460558.500000000, , ,   278.57351,  -30.89478,  8.261600,  1.378084,    8.527,  7.005,   2.933898568965,  0.8632492,  2.36742985358321, 22.4810390,  114.5950,/T,   18.2050,   83.033, 277.881,    3.327051,-10.200638,
 2024-Sep-06 00:00, 2460559.500000000, , ,   278.64093,  -30.88541,  9.086753,  1.481480,    8.544,  7.010,   2.934396018874,  0.8595051,  2.38045867844869, 22.6348850,  113.6940,/T,   18.3305,   83.155, 277.858,    3.360992,-10.248695,
 2024-Sep-07 00:00, 2460560.500000000, , ,   278.71472,  -30.87537,  9.904472,  1.583023,    8.560,  7.014,   2.934891303924,  0.8557528,  2.39357441445142, 22.7820065,  112.7979,/T,   18.4505,   83.272, 277.832,    3.397928,-10.301422,
 2024-Sep-08 00:00, 2460561.500000000, , ,   278.79483,  -30.86468,  10.71435,  1.682850,    8.576,  7.018,   2.935384419410,  0.8519923,  2.40677319997890, 22.9224826,  111.9066,/T,   18.5651,   83.383, 277.803,    3.437819,-10.358784,
 2024-Sep-09 00:00, 2460562.500000000, , ,   278.88119,  -30.85334,  11.51599,  1.781097,    8.592,  7.021,   2.935875360652,  0.8482238,  2.42005122282099, 23.0564052,  111.0202,/T,   18.6743,   83.489, 277.769,    3.480626,-10.420742,
 2024-Sep-10 00:00, 2460563.500000000, , ,   278.97373,  -30.84136,  12.30906,  1.877897,    8.608,  7.025,   2.936364122989,  0.8444471,  2.43340472752630, 23.1838792,  110.1386,/T,   18.7783,   83.590, 277.732,    3.526309,-10.487255,
 2024-Sep-11 00:00, 2460564.500000000, , ,   279.07238,  -30.82876,  13.09321,  1.973378,    8.624,  7.028,   2.936850701784,  0.8406625,  2.44683002342992, 23.3050245,  109.2618,/T,   18.8770,   83.687, 277.691,    3.574825,-10.558281,
 2024-Sep-12 00:00, 2460565.500000000, , ,   279.17707,  -30.81554,  13.86814,  2.067668,    8.639,  7.031,   2.937335092414,  0.8368698,  2.46032349457724, 23.4199808,  108.3896,/T,   18.9705,   83.779, 277.647,    3.626134,-10.633775,
 2024-Sep-13 00:00, 2460566.500000000, , ,   279.28773,  -30.80171,  14.63358,  2.160891,    8.655,  7.034,   2.937817290280,  0.8330692,  2.47388161268740, 23.5289132,  107.5220,/T,   19.0589,   83.866, 277.599,    3.680193,-10.713689,
 2024-Sep-14 00:00, 2460567.500000000, , ,   279.40428,  -30.78727,  15.38928,  2.253169,    8.670,  7.037,   2.938297290798,  0.8292606,  2.48750095367901, 23.6320182,  106.6590,/T,   19.1422,   83.949, 277.548,    3.736960,-10.797975,
 2024-Sep-15 00:00, 2460568.500000000, , ,   279.52663,  -30.77224,  16.13509,  2.344626,    8.685,  7.040,   2.938775089401,  0.8254441,  2.50117821681100, 23.7295262,  105.8005,/T,   19.2206,   84.027, 277.493,    3.796393,-10.886584,
 2024-Sep-16 00:00, 2460569.500000000, , ,   279.65472,  -30.75661,  16.87098,  2.435390,    8.699,  7.043,   2.939250681543,  0.8216197,  2.51491024304133, 23.8216956,  104.9464,/T,   19.2940,   84.101, 277.435,    3.858450,-10.979465,
 2024-Sep-17 00:00, 2460570.500000000, , ,   279.78846,  -30.74040,  17.59704,  2.525595,    8.714,  7.045,   2.939724062696,  0.8177875,  2.52869402632583, 23.9087934,  104.0967,/T,   19.3625,   84.172, 277.374,    3.923089,-11.076566,
 2024-Sep-18 00:00, 2460571.500000000, , ,   279.92776,  -30.72359,  18.31352,  2.615379,    8.728,  7.047,   2.940195228352,  0.8139475,  2.54252670999696, 23.9910637,  103.2512,/T,   19.4262,   84.238, 277.310,    3.990269,-11.177839,
 2024-Sep-19 00:00, 2460572.500000000, , ,   280.07257,  -30.70620,  19.02082,  2.704885,    8.742,  7.050,   2.940664174022,  0.8100997,  2.55640556250219, 24.0686898,  102.4099,/T,   19.4852,   84.301, 277.242,    4.059954,-11.283234,
 2024-Sep-20 00:00, 2460573.500000000, , ,   280.22280,  -30.68823,  19.71939,  2.794249,    8.756,  7.051,   2.941130895242,  0.8062442,  2.57032793357556, 24.1417668,  101.5726,/T,   19.5396,   84.359, 277.171,    4.132105,-11.392706,
 2024-Sep-21 00:00, 2460574.500000000, , ,   280.37838,  -30.66968,  20.40964,  2.883597,    8.770,  7.053,   2.941595387569,  0.8023810,  2.58429120043038, 24.2102961,  100.7394,/T,   19.5892,   84.415, 277.097,    4.206688,-11.506212,
 2024-Sep-22 00:00, 2460575.500000000, , ,   280.53926,  -30.65054,  21.09193,  2.973042,    8.783,  7.055,   2.942057646582,  0.7985102,  2.59829271811011, 24.2742042,   99.9101,/T,   19.6344,   84.466, 277.019,    4.283671,-11.623710,
 2024-Sep-23 00:00, 2460576.500000000, , ,   280.70536,  -30.63081,  21.76644,  3.062677,    8.797,  7.057,   2.942517667889,  0.7946317,  2.61232978539736, 24.3333756,   99.0847,/T,   19.6749,   84.515, 276.939,    4.363022,-11.745160,
 2024-Sep-24 00:00, 2460577.500000000, , ,   280.87662,  -30.61050,  22.43327,  3.152584,    8.810,  7.058,   2.942975447121,  0.7907457,  2.62639963006079, 24.3876846,   98.2631,/T,   19.7111,   84.560, 276.856,    4.444711,-11.870523,
 2024-Sep-25 00:00, 2460578.500000000, , ,   281.05298,  -30.58961,  23.09240,  3.242833,    8.823,  7.059,   2.943430979933,  0.7868522,  2.64049941013030, 24.4370182,   97.4453,/T,   19.7427,   84.602, 276.770,    4.528706,-11.999761,
 2024-Sep-26 00:00, 2460579.500000000, , ,   281.23438,  -30.56812,  23.74375,  3.333485,    8.836,  7.061,   2.943884262009,  0.7829512,  2.65462622471897, 24.4812863,   96.6312,/T,   19.7701,   84.640, 276.680,    4.614979,-12.132832,
 2024-Sep-27 00:00, 2460580.500000000, , ,   281.42075,  -30.54603,  24.38721,  3.424598,    8.849,  7.062,   2.944335289058,  0.7790428,  2.66877712841490, 24.5204247,   95.8208,/T,   19.7930,   84.676, 276.588,    4.703500,-12.269698,
 2024-Sep-28 00:00, 2460581.500000000, , ,   281.61203,  -30.52335,  25.02265,  3.516225,    8.861,  7.062,   2.944784056816,  0.7751271,  2.68294914544770, 24.5543919,   95.0140,/T,   19.8118,   84.709, 276.493,    4.794239,-12.410317,
 2024-Sep-29 00:00, 2460582.500000000, , ,   281.80815,  -30.50007,  25.64993,  3.608414,    8.873,  7.063,   2.945230561046,  0.7712040,  2.69713928201387, 24.5831662,   94.2108,/T,   19.8263,   84.739, 276.396,    4.887167,-12.554647,
 2024-Sep-30 00:00, 2460583.500000000, , ,   282.00905,  -30.47618,  26.26893,  3.701211,    8.885,  7.064,   2.945674797537,  0.7672736,  2.71134453660760, 24.6067424,   93.4111,/T,   19.8366,   84.766, 276.295,    4.982254,-12.702646,
 2024-Oct-01 00:00, 2460584.500000000, , ,   282.21465,  -30.45168,  26.87950,  3.794658,    8.897,  7.064,   2.946116762105,  0.7633360,  2.72556190890574, 24.6251296,   92.6150,/T,   19.8428,   84.790, 276.192,    5.079471,-12.854269,
 2024-Oct-02 00:00, 2460585.500000000, , ,   282.42489,  -30.42656,  27.48153,  3.888794,    8.909,  7.065,   2.946556450592,  0.7593912,  2.73978840791017, 24.6383508,   91.8223,/T,   19.8450,   84.812, 276.086,    5.178787,-13.009471,
 2024-Oct-03 00:00, 2460586.500000000, , ,   282.63970,  -30.40083,  28.07489,  3.983651,    8.920,  7.065,   2.946993858867,  0.7554392,  2.75402105988979, 24.6464429,   91.0330,/T,   19.8431,   84.831, 275.977,    5.280175,-13.168207,
 2024-Oct-04 00:00, 2460587.500000000, , ,   282.85900,  -30.37447,  28.65945,  4.079263,    8.932,  7.065,   2.947428982827,  0.7514802,  2.76825691637979, 24.6494565,   90.2471,/T,   19.8373,   84.847, 275.866,    5.383604,-13.330431,
 2024-Oct-05 00:00, 2460588.500000000, , ,   283.08273,  -30.34748,  29.23511,  4.175654,    8.943,  7.065,   2.947861818392,  0.7475141,  2.78249306223278, 24.6474564,   89.4646,/T,   19.8277,   84.862, 275.753,    5.489045,-13.496094,
 2024-Oct-06 00:00, 2460589.500000000, , ,   283.31081,  -30.31986,  29.80178,  4.272850,    8.954,  7.065,   2.948292361513,  0.7435409,  2.79672662357929, 24.6405206,   88.6853,/T,   19.8141,   84.874, 275.636,    5.596469,-13.665150,
 2024-Oct-07 00:00, 2460590.500000000, , ,   283.54317,  -30.29159,  30.35937,  4.370871,    8.965,  7.065,   2.948720608162,  0.7395609,  2.81095477559160, 24.6287408,   87.9094,/T,   19.7969,   84.883, 275.518,    5.705848,-13.837549,
 2024-Oct-08 00:00, 2460591.500000000, , ,   283.77972,  -30.26268,  30.90780,  4.469734,    8.975,  7.065,   2.949146554341,  0.7355739,  2.82517475014633, 24.6122219,   87.1366,/T,   19.7759,   84.891, 275.397,    5.817151,-14.013241,
 2024-Oct-09 00:00, 2460592.500000000, , ,   284.02041,  -30.23312,  31.44701,  4.569454,    8.986,  7.064,   2.949570196076,  0.7315801,  2.83938384377555, 24.5910831,   86.3670,/T,   19.7512,   84.897, 275.274,    5.930352,-14.192177,
 2024-Oct-10 00:00, 2460593.500000000, , ,   284.26515,  -30.20289,  31.97697,  4.670041,    8.996,  7.064,   2.949991529420,  0.7275794,  2.85357942656845, 24.5654604,   85.6004,/T,   19.7230,   84.900, 275.148,    6.045421,-14.374306,
 2024-Oct-11 00:00, 2460594.500000000, , ,   284.51387,  -30.17200,  32.49765,  4.771505,    9.006,  7.063,   2.950410550451,  0.7235719,  2.86775895277410, 24.5355099,   84.8370,/T,   19.6912,   84.902, 275.021,    6.162331,-14.559577,
 2024-Oct-12 00:00, 2460595.500000000, , ,   284.76649,  -30.14044,  33.00906,  4.873856,    9.016,  7.063,   2.950827255274,  0.7195577,  2.88191997355603, 24.5014116,   84.0766,/T,   19.6560,   84.902, 274.891,    6.281054,-14.747940,
 2024-Oct-13 00:00, 2460596.500000000, , ,   285.02293,  -30.10821,  33.51125,  4.977107,    9.025,  7.062,   2.951241640017,  0.7155369,  2.89606015141041, 24.4633709,   83.3191,/T,   19.6173,   84.900, 274.759,    6.401564,-14.939343,
 2024-Oct-14 00:00, 2460597.500000000, , ,   285.28313,  -30.07529,  34.00436,  5.081278,    9.035,  7.061,   2.951653700836,  0.7115094,  2.91017727401272, 24.4216145,   82.5645,/T,   19.5753,   84.897, 274.625,    6.523834,-15.133735,
 2024-Oct-15 00:00, 2460598.500000000, , ,   285.54700,  -30.04168,  34.48860,  5.186400,    9.044,  7.060,   2.952063433911,  0.7074752,  2.92426926290955, 24.3763759,   81.8127,/T,   19.5300,   84.892, 274.489,    6.647840,-15.331068,
$$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_(ICRF),' =
  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 decimal degrees,  ddd.fffff{ffff}
         DEC in decimal degrees,  sdd.fffff{ffff}
 
 'dRA*cosD, d(DEC)/dt,' =
  The angular rate of change in aparent RA and DEC of the target. This is
with respect to the non-inertial IAU76/80 Earth true equator and equinox
of-date reference frame.  d(RA)/dt is multiplied by the cosine of declination
to provide a linear rate in the plane-of-sky. Units: ARCSECONDS PER HOUR
 
 'APmag,  S-brt,' =
   The asteroids' approximate apparent airless visual magnitude and surface
brightness using the standard IAU H-G system magnitude model:

   APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi_1 + G*phi_2)

   For solar phase angles >90 deg, the error could exceed 1 magnitude. For
phase angles >120 degrees, output values are rounded to the nearest integer to
indicate error could be large and unknown. For Earth-based observers, the
estimated dimming due to atmospheric absorption (extinction) is available as
a separate, requestable quantity.

   Surface brightness is the average airless visual magnitude of a
square-arcsecond of the illuminated portion of the apparent disk. It is
computed only if the target radius is known.

   Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND
 
 '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
 
 '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
 
 'S-T-O,' =
   The Sun-Target-Observer angle; the interior vertex angle at target center
formed by a vector from the target to the apparent center of the Sun (at
reflection time on the target) and the apparent vector from target to the
observer at print-time. Slightly different from true PHASE ANGLE (requestable
separately) at the few arcsecond level in that it includes stellar aberration
on the down-leg from target to observer.  Units: DEGREES
 
 'PsAng,   PsAMV,' =
   The position angles of the extended Sun-to-target radius vector ("PsAng")
and the negative of the targets' heliocentric velocity vector ("PsAMV"), as
seen in the observers' plane-of-sky, measured counter-clockwise (east) from
reference-frame north-pole. Primarily intended for ACTIVE COMETS, "PsAng"
is an indicator of the comets' gas-tail orientation in the sky (being in the
anti-sunward direction) while "PsAMV" is an indicator of dust-tail orientation.
Units: DEGREES
 
 'GlxLon,    GlxLat,' =
   Observer-centered Galactic System II (post WW II) longitude and latitude
of the target centers' apparent position, with light-time, gravitational
deflection of light, and stellar aberrations. 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

********************************************************************************************************************************************************************************************************************************************
