# Orbital and Ephemeris Information for Comet 1996 B2 Hyakutake

## Orbit and Ephemeris Updates for Comet 1996 B2 Hyakutake

Don Yeomans - JPL
May 13, 1996

The following orbits and ephemerides include the rocket-like effects (nongravitational accelerations) usually associated with active comets. Normally, these effects cannot be determined accurately with fewer than three apparitions so they are rarely used for one apparition long-period comets. While the formal errors of these nongravitational parameters (A1, A2) are quite small, realistic errors are probably several times larger. Given the short observation interval and the relatively large radial nongravitational acceleration noted, one cannot escape the conclusion that this comet is small (easy to push around...) - a conclusion consistent with the recent radar results reported by Steve Ostro.

Original and Future Orbital Periods

If one takes the orbit given below and numerically integrates it backward and forward in time so that the comet is outside the planetary system, and then refers these orbits to the solar system barycenter, one can get an "original" and "future" orbital period of 17,500 and 29,500 years respectively. That is, the comet was last at perihelion 17,500 years ago and will not return for another 29,500 years. These estimates are very approximate and will likely change as the orbit is updated.

```
Object: Comet 1996 B2 Hyakutake
Ref. Solution: 46
Planetary Ephemeris: DE403
No. Observations:   851
Observation Arc:  1996 Jan  1 - 1996 May 11

---- Optical Residuals ----      RA        Dec      Total
Mean                             .023     -.016      .028
RMS, unweighted                  .835      .716      .777
RMS, weighted                                        .777
Normalized RMS                                       .777 (mean residual = 0.62")
No. optical observations:   848

Normalized RMS                   .000     3.419         .790
No. Delay, Doppler Obs.:   0,  3

---- Corrected Elements (J2000):  Solution 46
Epoch  2450270.50000 = 1996 Jul  6.00000
Post-Fit Std.Dev.
e      0.999802443      .000018742
q      0.230190159      .000003182
Tp     2450204.8961527  .0000702    1996 May  1.39615
Node   188.0463289      .0000232
w      130.1652853      .0004552
i      124.9240377      .0001278
A1     3.0437E-8       0.073E-8
A2    -0.3923E-8       0.081E-8

---- Elements at other epochs:
Epoch (TDB)   e         q         Node         w          i              Tp
1996 Mar 25.0  .99989641 .230223600 188.045288 130.174983 124.923336  1996 May  1.394016
1996 Apr 27.0  .99972528 .230218755 188.045490 130.178887 124.923913  1996 May  1.395170
1996 May 17.0  .99975406 .230203169 188.045498 130.164592 124.923908  1996 May  1.394672
1996 May 27.0  .99977928 .230197578 188.045528 130.164554 124.923923  1996 May  1.395094
1996 Jun  6.0  .99979088 .230194362 188.045613 130.164690 124.923948  1996 May  1.395455
1996 Jun 16.0  .99979704 .230192284 188.045766 130.164856 124.923979  1996 May  1.395751

e:      Eccentricity
q:      Perihelion passage distance (AU)
Node:   Longitude of the ascending node (deg.)
w:      Argument of perihelion (deg.)
i:      Inclination (deg.)
Tp:     Perihelion passage time (TDB)
A1:     Radial sun-comet nongravitational acceleration parameter in AU/(day)**2
A2:     Transverse nongravitational acceleration parameter in AU/(day)**2

Rough 1 sigma ephemeris uncertainties are:

RA   DEC
1996 May  15   1"   1"
May  30   3"   2"
June 15   7"   2"
June 30  10"   3"
July 15  11"   7"

Ephemeris (with perturbations) for Comet 1996 B2 Hyakutake
JPL Ref. Orbit 46 by D.K. Yeomans, May 13, 1996
Ephemeris output times are UTC (not TT).

Date (UT)  Hr      R.A. J2000  Dec.      Delta  Deldot   r    Theta Beta Moon TMag
1996 May 10 00  02 22 54.64 +07 32 44.7   1.239  -6.195  .372   15.1  44.9  80  1.7
1996 May 10 12  02 23 18.67 +06 47 05.6   1.237  -6.921  .385   16.0  46.3  73  1.8
1996 May 11 00  02 23 45.43 +06 01 57.6   1.235  -7.554  .397   16.9  47.6  66  1.9
1996 May 11 12  02 24 14.76 +05 17 19.0   1.232  -8.106  .410   17.7  48.7  59  2.1
1996 May 12 00  02 24 46.50 +04 33 08.0   1.230  -8.585  .422   18.6  49.8  52  2.2
1996 May 12 12  02 25 20.52 +03 49 23.0   1.227  -8.999  .435   19.5  50.8  45  2.3
1996 May 13 00  02 25 56.69 +03 06 02.1   1.225  -9.355  .447   20.3  51.7  39  2.4
1996 May 13 12  02 26 34.90 +02 23 03.9   1.222  -9.660  .460   21.2  52.6  32  2.6
1996 May 14 00  02 27 15.04 +01 40 26.6   1.219  -9.918  .473   22.0  53.4  26  2.7
1996 May 14 12  02 27 57.04 +00 58 08.8   1.216 -10.134  .485   22.9  54.1  21  2.8
1996 May 15 00  02 28 40.80 +00 16 08.9   1.213 -10.311  .498   23.7  54.7  16  2.9
1996 May 15 12  02 29 26.24 -00 25 34.3   1.210 -10.455  .511   24.5  55.3  13  3.0
1996 May 16 00  02 30 13.32 -01 07 02.3   1.207 -10.566  .523   25.4  55.9  14  3.1
1996 May 16 12  02 31 01.95 -01 48 16.3   1.204 -10.649  .536   26.2  56.4  16  3.2
1996 May 17 00  02 31 52.10 -02 29 17.4   1.201 -10.706  .548   27.0  56.9  21  3.3
1996 May 17 12  02 32 43.71 -03 10 06.8   1.198 -10.738  .561   27.8  57.3  26  3.4
1996 May 18 00  02 33 36.73 -03 50 45.5   1.195 -10.748  .573   28.6  57.7  31  3.5
1996 May 18 12  02 34 31.13 -04 31 14.6   1.192 -10.736  .586   29.4  58.0  37  3.6
1996 May 19 00  02 35 26.87 -05 11 34.9   1.189 -10.705  .598   30.2  58.3  43  3.6
1996 May 19 12  02 36 23.93 -05 51 47.3   1.186 -10.656  .610   31.0  58.6  48  3.7
1996 May 20 00  02 37 22.26 -06 31 52.7   1.183 -10.590  .623   31.8  58.8  54  3.8
1996 May 20 12  02 38 21.86 -07 11 51.7   1.179 -10.508  .635   32.6  59.1  60  3.9
1996 May 21 00  02 39 22.69 -07 51 45.2   1.176 -10.410  .647   33.3  59.3  65  4.0
1996 May 21 12  02 40 24.73 -08 31 33.7   1.173 -10.298  .659   34.1  59.4  71  4.0
1996 May 22 00  02 41 27.97 -09 11 17.9   1.171 -10.172  .671   34.9  59.6  76  4.1
1996 May 22 12  02 42 32.40 -09 50 58.4   1.168 -10.033  .683   35.6  59.7  82  4.2
1996 May 23 00  02 43 38.00 -10 30 35.6   1.165  -9.881  .695   36.4  59.8  87  4.3
1996 May 23 12  02 44 44.76 -11 10 10.1   1.162  -9.718  .707   37.2  59.9  92  4.3
1996 May 24 00  02 45 52.67 -11 49 42.3   1.159  -9.543  .719   37.9  59.9  97  4.4
1996 May 24 12  02 47 01.72 -12 29 12.6   1.156  -9.356  .731   38.7  60.0 103  4.5
1996 May 25 00  02 48 11.92 -13 08 41.3   1.154  -9.159  .743   39.4  60.0 108  4.5
1996 May 25 12  02 49 23.25 -13 48 08.8   1.151  -8.952  .754   40.2  60.0 113  4.6
1996 May 26 00  02 50 35.71 -14 27 35.4   1.149  -8.735  .766   40.9  60.0 118  4.6
1996 May 26 12  02 51 49.30 -15 07 01.3   1.146  -8.508  .777   41.6  60.0 123  4.7
1996 May 27 00  02 53 04.03 -15 46 26.8   1.144  -8.271  .789   42.4  60.0 127  4.8
1996 May 27 12  02 54 19.88 -16 25 51.9   1.141  -8.025  .801   43.1  59.9 132  4.8
1996 May 28 00  02 55 36.88 -17 05 17.0   1.139  -7.771  .812   43.8  59.8 136  4.9
1996 May 28 12  02 56 55.01 -17 44 42.0   1.137  -7.507  .823   44.6  59.8 139  4.9
1996 May 29 00  02 58 14.29 -18 24 07.2   1.135  -7.236  .835   45.3  59.7 142  5.0
1996 May 29 12  02 59 34.71 -19 03 32.5   1.133  -6.956  .846   46.0  59.6 145  5.0
1996 May 30 00  03 00 56.30 -19 42 57.9   1.131  -6.668  .857   46.7  59.4 146  5.1
1996 May 30 12  03 02 19.04 -20 22 23.6   1.129  -6.372  .868   47.5  59.3 146  5.2
1996 May 31 00  03 03 42.97 -21 01 49.4   1.127  -6.068  .880   48.2  59.2 145  5.2
1996 May 31 12  03 05 08.07 -21 41 15.3   1.125  -5.757  .891   48.9  59.0 143  5.3
1996 Jun  1 00  03 06 34.38 -22 20 41.3   1.124  -5.439  .902   49.6  58.9 140  5.3
1996 Jun  1 12  03 08 01.88 -23 00 07.1   1.122  -5.114  .913   50.3  58.7 136  5.4
1996 Jun  2 00  03 09 30.61 -23 39 32.8   1.121  -4.782  .924   51.0  58.5 131  5.4
1996 Jun  2 12  03 11 00.57 -24 18 58.0   1.119  -4.443  .935   51.7  58.4 127  5.5
1996 Jun  3 00  03 12 31.78 -24 58 22.7   1.118  -4.098  .946   52.4  58.2 121  5.5
1996 Jun  3 12  03 14 04.25 -25 37 46.7   1.117  -3.746  .957   53.1  58.0 116  5.5
1996 Jun  4 00  03 15 37.99 -26 17 09.6   1.116  -3.388  .967   53.8  57.8 111  5.6
1996 Jun  4 12  03 17 13.04 -26 56 31.4   1.115  -3.025  .978   54.4  57.5 105  5.6
1996 Jun  5 00  03 18 49.39 -27 35 51.6   1.114  -2.655  .989   55.1  57.3 100  5.7
1996 Jun  5 12  03 20 27.07 -28 15 10.1   1.113  -2.280 1.000   55.8  57.1  95  5.7
1996 Jun  6 00  03 22 06.10 -28 54 26.4   1.113  -1.900 1.010   56.5  56.9  89  5.8
1996 Jun  6 12  03 23 46.50 -29 33 40.4   1.112  -1.514 1.021   57.1  56.6  84  5.8
1996 Jun  7 00  03 25 28.28 -30 12 51.5   1.112  -1.124 1.031   57.8  56.4  80  5.9
1996 Jun  7 12  03 27 11.47 -30 51 59.5   1.112   -.728 1.042   58.5  56.1  75  5.9
1996 Jun  8 00  03 28 56.09 -31 31 04.0   1.112   -.327 1.052   59.1  55.9  71  6.0
1996 Jun  8 12  03 30 42.16 -32 10 04.6   1.112    .078 1.063   59.8  55.6  67  6.0
1996 Jun  9 00  03 32 29.71 -32 49 00.7   1.112    .487 1.073   60.4  55.3  63  6.0
1996 Jun  9 12  03 34 18.75 -33 27 52.1   1.112    .901 1.084   61.1  55.1  60  6.1
1996 Jun 10 00  03 36 09.31 -34 06 38.3   1.112   1.318 1.094   61.7  54.8  58  6.1
1996 Jun 10 12  03 38 01.42 -34 45 18.7   1.113   1.740 1.104   62.3  54.5  56  6.2
1996 Jun 11 00  03 39 55.10 -35 23 52.9   1.113   2.165 1.115   63.0  54.2  54  6.2
1996 Jun 11 12  03 41 50.37 -36 02 20.4   1.114   2.594 1.125   63.6  53.9  53  6.2
1996 Jun 12 00  03 43 47.27 -36 40 40.8   1.115   3.026 1.135   64.2  53.7  53  6.3
1996 Jun 12 12  03 45 45.81 -37 18 53.4   1.116   3.461 1.145   64.8  53.4  53  6.3
1996 Jun 13 00  03 47 46.04 -37 56 57.7   1.117   3.899 1.155   65.4  53.1  53  6.4
1996 Jun 13 12  03 49 47.97 -38 34 53.3   1.118   4.340 1.165   66.0  52.8  54  6.4
1996 Jun 14 00  03 51 51.63 -39 12 39.5   1.119   4.784 1.176   66.6  52.5  56  6.4
1996 Jun 14 12  03 53 57.06 -39 50 15.8   1.121   5.229 1.186   67.2  52.2  58  6.5
1996 Jun 15 00  03 56 04.29 -40 27 41.6   1.122   5.677 1.196   67.8  51.9  60  6.5

1996 Jun 15     03 56 04.29 -40 27 41.6   1.122   5.677 1.196   67.8  51.9  60  6.5
1996 Jun 16     04 00 24.26 -41 41 59.6   1.126   6.578 1.216   68.9  51.3  64  6.6
1996 Jun 17     04 04 51.80 -42 55 28.7   1.130   7.484 1.235   70.1  50.6  69  6.7
1996 Jun 18     04 09 27.16 -44 08 04.4   1.134   8.395 1.255   71.2  50.0  75  6.8
1996 Jun 19     04 14 10.64 -45 19 42.0   1.139   9.308 1.275   72.2  49.4  80  6.8
1996 Jun 20     04 19 02.49 -46 30 16.7   1.145  10.222 1.294   73.3  48.8  85  6.9
1996 Jun 21     04 24 03.02 -47 39 43.8   1.151  11.136 1.313   74.3  48.2  90  7.0
1996 Jun 22     04 29 12.51 -48 47 58.8   1.158  12.046 1.333   75.3  47.5  94  7.1
1996 Jun 23     04 34 31.26 -49 54 57.1   1.165  12.953 1.352   76.2  46.9  98  7.1
1996 Jun 24     04 39 59.55 -51 00 34.3   1.173  13.854 1.371   77.2  46.3 101  7.2
1996 Jun 25     04 45 37.67 -52 04 46.1   1.181  14.749 1.390   78.0  45.7 104  7.3
1996 Jun 26     04 51 25.91 -53 07 28.4   1.190  15.635 1.408   78.9  45.1 106  7.4
1996 Jun 27     04 57 24.54 -54 08 37.2   1.199  16.512 1.427   79.7  44.5 106  7.4
1996 Jun 28     05 03 33.81 -55 08 08.5   1.209  17.378 1.446   80.5  43.9 106  7.5
1996 Jun 29     05 09 53.97 -56 05 58.9   1.219  18.233 1.464   81.3  43.3 106  7.6
1996 Jun 30     05 16 25.23 -57 02 04.9   1.230  19.075 1.483   82.0  42.8 104  7.7
1996 Jul  1     05 23 07.77 -57 56 23.4   1.241  19.903 1.501   82.7  42.2 103  7.7
1996 Jul  2     05 30 01.74 -58 48 51.4   1.253  20.717 1.519   83.3  41.7 100  7.8
1996 Jul  3     05 37 07.23 -59 39 26.3   1.265  21.516 1.537   83.9  41.1  98  7.9
1996 Jul  4     05 44 24.29 -60 28 05.6   1.278  22.299 1.555   84.5  40.6  96  8.0
1996 Jul  5     05 51 52.91 -61 14 47.2   1.291  23.067 1.573   85.1  40.1  94  8.0
1996 Jul  6     05 59 32.98 -61 59 29.2   1.305  23.817 1.591   85.6  39.6  92  8.1
1996 Jul  7     06 07 24.35 -62 42 10.2   1.319  24.551 1.609   86.1  39.1  91  8.2
1996 Jul  8     06 15 26.75 -63 22 48.8   1.333  25.268 1.627   86.5  38.6  90  8.2
1996 Jul  9     06 23 39.85 -64 01 24.1   1.348  25.968 1.644   86.9  38.1  89  8.3
1996 Jul 10     06 32 03.20 -64 37 55.4   1.363  26.650 1.662   87.3  37.7  89  8.4
1996 Jul 11     06 40 36.27 -65 12 22.4   1.379  27.314 1.679   87.7  37.2  88  8.4
1996 Jul 12     06 49 18.39 -65 44 45.4   1.394  27.961 1.697   88.0  36.8  87  8.5
1996 Jul 13     06 58 08.84 -66 15 04.6   1.411  28.590 1.714   88.3  36.4  87  8.6
1996 Jul 14     07 07 06.76 -66 43 20.9   1.427  29.201 1.731   88.5  35.9  86  8.7
1996 Jul 15     07 16 11.23 -67 09 35.6   1.445  29.794 1.748   88.8  35.5  85  8.7
1996 Jul 16     07 25 21.23 -67 33 50.2   1.462  30.370 1.765   89.0  35.1  84  8.8
1996 Jul 17     07 34 35.66 -67 56 06.7   1.480  30.929 1.782   89.1  34.8  83  8.9
1996 Jul 18     07 43 53.37 -68 16 27.7   1.498  31.470 1.799   89.3  34.4  81  8.9
1996 Jul 19     07 53 13.16 -68 34 55.7   1.516  31.994 1.816   89.4  34.0  80  9.0
1996 Jul 20     08 02 33.81 -68 51 33.9   1.535  32.501 1.833   89.5  33.7  79  9.1
1996 Jul 21     08 11 54.10 -69 06 25.8   1.553  32.991 1.850   89.6  33.3  78  9.1
1996 Jul 22     08 21 12.79 -69 19 35.1   1.573  33.465 1.867   89.6  33.0  77  9.2
1996 Jul 23     08 30 28.69 -69 31 05.8   1.592  33.922 1.883   89.6  32.6  77  9.3
1996 Jul 24     08 39 40.65 -69 41 02.2   1.612  34.364 1.900   89.6  32.3  77  9.3
1996 Jul 25     08 48 47.58 -69 49 28.6   1.632  34.790 1.916   89.6  32.0  78  9.4
1996 Jul 26     08 57 48.47 -69 56 29.8   1.652  35.200 1.933   89.6  31.7  80  9.5
1996 Jul 27     09 06 42.38 -70 02 10.2   1.672  35.596 1.949   89.5  31.4  82  9.5
1996 Jul 28     09 15 28.48 -70 06 34.7   1.693  35.977 1.965   89.4  31.1  85  9.6
1996 Jul 29     09 24 06.02 -70 09 48.1   1.714  36.343 1.982   89.3  30.8  89  9.6
1996 Jul 30     09 32 34.38 -70 11 54.9   1.735  36.696 1.998   89.2  30.5  93  9.7
1996 Jul 31     09 40 53.02 -70 12 59.9   1.756  37.035 2.014   89.1  30.3  98  9.8
1996 Aug  1     09 49 01.52 -70 13 07.7   1.778  37.360 2.030   88.9  30.0 102  9.8
1996 Aug  2     09 56 59.52 -70 12 22.8   1.800  37.673 2.046   88.7  29.7 105  9.9
1996 Aug  3     10 04 46.79 -70 10 49.5   1.821  37.972 2.062   88.5  29.5 108  9.9
1996 Aug  4     10 12 23.16 -70 08 32.0   1.843  38.259 2.078   88.3  29.2 110 10.0
1996 Aug  5     10 19 48.54 -70 05 34.4   1.866  38.534 2.094   88.1  29.0 111 10.1
1996 Aug  6     10 27 02.92 -70 02 00.4   1.888  38.797 2.110   87.9  28.7 111 10.1
1996 Aug  7     10 34 06.34 -69 57 53.8   1.910  39.047 2.126   87.6  28.5 110 10.2
1996 Aug  8     10 40 58.89 -69 53 17.9   1.933  39.286 2.141   87.4  28.2 108 10.2
1996 Aug  9     10 47 40.71 -69 48 16.0   1.956  39.514 2.157   87.1  28.0 105 10.3
1996 Aug 10     10 54 11.98 -69 42 51.0   1.979  39.730 2.173   86.8  27.8 102 10.4
1996 Aug 11     11 00 32.91 -69 37 05.9   2.002  39.935 2.188   86.5  27.5  98 10.4
1996 Aug 12     11 06 43.75 -69 31 03.3   2.025  40.129 2.204   86.2  27.3  93 10.5
1996 Aug 13     11 12 44.75 -69 24 45.5   2.048  40.312 2.219   85.9  27.1  88 10.5
1996 Aug 14     11 18 36.19 -69 18 14.9   2.071  40.485 2.235   85.6  26.9  84 10.6
1996 Aug 15     11 24 18.36 -69 11 33.6   2.095  40.648 2.250   85.3  26.7  79 10.6
1996 Aug 16     11 29 51.54 -69 04 43.3   2.118  40.801 2.265   84.9  26.4  74 10.7
1996 Aug 17     11 35 16.05 -68 57 46.1   2.142  40.943 2.281   84.6  26.2  70 10.7
1996 Aug 18     11 40 32.18 -68 50 43.3   2.166  41.077 2.296   84.2  26.0  67 10.8
1996 Aug 19     11 45 40.24 -68 43 36.6   2.189  41.200 2.311   83.8  25.8  64 10.8
1996 Aug 20     11 50 40.52 -68 36 27.2   2.213  41.315 2.326   83.5  25.6  62 10.9
1996 Aug 21     11 55 33.31 -68 29 16.3   2.237  41.420 2.341   83.1  25.4  62 10.9
1996 Aug 22     12 00 18.92 -68 22 05.1   2.261  41.517 2.356   82.7  25.2  63 11.0
1996 Aug 23     12 04 57.61 -68 14 54.7   2.285  41.605 2.371   82.3  25.0  66 11.0
1996 Aug 24     12 09 29.67 -68 07 45.7   2.309  41.685 2.386   81.9  24.8  70 11.1
1996 Aug 25     12 13 55.36 -68 00 39.2   2.333  41.757 2.401   81.5  24.6  76 11.1
1996 Aug 26     12 18 14.95 -67 53 35.7   2.357  41.821 2.416   81.1  24.4  82 11.2
1996 Aug 27     12 22 28.68 -67 46 36.0   2.381  41.877 2.431   80.6  24.2  90 11.2
1996 Aug 28     12 26 36.82 -67 39 40.6   2.406  41.926 2.446   80.2  24.0  97 11.3
1996 Aug 29     12 30 39.59 -67 32 50.1   2.430  41.968 2.461   79.8  23.8 104 11.3
1996 Aug 30     12 34 37.23 -67 26 04.9   2.454  42.002 2.475   79.4  23.6 111 11.4
1996 Aug 31     12 38 29.95 -67 19 25.5   2.478  42.029 2.490   78.9  23.4 116 11.4
1996 Sep  1     12 42 17.97 -67 12 52.2   2.503  42.050 2.505   78.5  23.3 120 11.5
1996 Sep  2     12 46 01.50 -67 06 25.5   2.527  42.063 2.519   78.0  23.1 122 11.5
1996 Sep  3     12 49 40.72 -67 00 05.6   2.551  42.069 2.534   77.6  22.9 122 11.6
1996 Sep  4     12 53 15.82 -66 53 52.7   2.576  42.068 2.548   77.1  22.7 121 11.6
1996 Sep  5     12 56 46.98 -66 47 47.3   2.600  42.061 2.563   76.7  22.5 118 11.7
1996 Sep  6     13 00 14.35 -66 41 49.4   2.624  42.046 2.577   76.2  22.3 114 11.7
1996 Sep  7     13 03 38.11 -66 35 59.2   2.648  42.025 2.592   75.8  22.1 109 11.8
1996 Sep  8     13 06 58.40 -66 30 16.9   2.673  41.996 2.606   75.3  22.0 103 11.8
1996 Sep  9     13 10 15.37 -66 24 42.7   2.697  41.962 2.621   74.8  21.8  97 11.8
1996 Sep 10     13 13 29.15 -66 19 16.6   2.721  41.920 2.635   74.4  21.6  91 11.9
1996 Sep 11     13 16 39.87 -66 13 58.7   2.745  41.872 2.649   73.9  21.4  84 11.9
1996 Sep 12     13 19 47.65 -66 08 49.1   2.769  41.818 2.663   73.4  21.2  78 12.0
1996 Sep 13     13 22 52.62 -66 03 47.9   2.794  41.757 2.678   73.0  21.1  71 12.0
1996 Sep 14     13 25 54.88 -65 58 55.0   2.818  41.691 2.692   72.5  20.9  66 12.1
1996 Sep 15     13 28 54.54 -65 54 10.4   2.842  41.618 2.706   72.0  20.7  61 12.1

R.A. J2000  Dec. = Geocentric astrometric right ascension and declination
referred to the mean equator and equinox of J2000.
Light time corrections have been applied

Delta            = Geocentric distance of object in AU

Deldot           = Geocentric radial velocity of object in km/s

r                = Heliocentric distance of object in AU

Theta            = Sun-Earth-Object angle in degrees

Beta             = Sun-Object-Earth angle in degrees

Moon             = Object-Earth-Moon angle in degrees

TMag             = Total magnitude =  5.5 + 5.00*log(Delta) + 10.00*log(r)
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