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Comet Hale-Bopp Orbit and Ephemeris Information

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This chart is a ray-traced image of the orbit planes of Earth and Comet Hale-Bopp and their positions from March to May 1997. Courtesy of Eric Frappa from the Saint-Etienne Planetarium in France.

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Orbit and Ephemeris Information for Comet 1995 O1 Hale-Bopp

Don Yeomans - JPL
January 27, 1997

Additional observations through Jan. 19, 1997 have been used to update the orbit, ephemeris, and error analysis.


 Object: Comet C/1995 O1 (Hale-Bopp)
 JPL Ref. Solution: 48
 Planetary Ephemeris: DE403
 No. Observations:  1772
 Observation Arc:  1993 Apr 27 - 1997 Jan 19

 ---- Residual Summary ----       RA        Dec      Total
 Mean                             .004      .007      .008
 RMS, unweighted                  .641      .818      .735

 ---- Corrected Elements (J2000):  Solution 48
   Epoch  2450571.50000 = 1997 May  3.00000
                        Post-Fit Std.Dev.
 e    0.995107808       .000001002
 q    0.914103842       .000001861
 Tp   2450539.6353558   .0002557    1997 Apr  1.13536
 Node 282.4708075       .0000054
 w    130.5910110       .0000886
 i     89.4293189       .0000336


ORBITAL ELEMENTS FOR COMET HALE-BOPP (1995 O1)
The following (J2000) osculating orbital elements can be used to
generate ephemeris data using two body programs.  However, care must
be taken to select an orbital element set with an epoch close to
the desired ephemeris output times.


Elements at other epochs:
  Epoch (TDB)     e        q       Node      w         i           Tp
1996 Oct  5.0  .9952196 .9142922 282.47235 130.57623  89.43236  1997 Apr  1.125624
1997 Jan 12.0  .9950907 .9141164 282.47088 130.58980  89.42959  1997 Apr  1.134909
1997 Mar 13.0  .9950949 .9141041 282.47069 130.59092  89.42945  1997 Apr  1.135287
1997 May  2.0  .9951077 .9141039 282.47081 130.59101  89.42932  1997 Apr  1.135355
1997 Sep 30.0  .9950804 .9140236 282.46924 130.58587  89.42802  1997 Apr  1.134290

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)


Original and Future Orbital periods
By integrating the above orbit forward and backward in time until the comet
leaves the planetary system and then referring the osculating orbital elements
to the solar system barycenter, the following orbital periods result:

Original orbital period before entering planetary system = 4200 years
Future orbital period after exiting planetary system     = 2380 years



Ephemeris data at 1 day steps (O hours UTC)

Ephemeris computed using JPL orbital solution No. 48 dated Jan. 27, 1997
The given magnitude estimates correspond to the more conservative of two
estimates given by Charles Morris.


Absolute (inertial) plane-of-sky ephemeris uncertainties (1-sigma)
over this interval are as follows:

   1996 Aug. - Sep.    < 1"
   1997 Jan. - Feb.    < 1"
   1997 Mar.           < 3"
   1997 Apr.           < 2"


Ephemeris (with perturbations) for Comet Hale-Bopp (1995 O1)
JPL Ref. Orbit 48 by D.K. Yeomans, Jan. 27, 1997

 Date (UT)       R.A. J2000  Dec.     Delta Deldot    r   Theta Beta Moon PsAng PsAMV TMag
1997 Feb  1  19 40 32.57 +15 28 44.9  2.004 -34.13  1.368  37.9  26.3  77 328.6 200.2  2.5
1997 Feb  2  19 42 59.75 +15 57 49.9  1.985 -34.18  1.356  38.3  26.7  67 328.2 201.2  2.5
1997 Feb  3  19 45 30.19 +16 27 33.9  1.965 -34.21  1.344  38.6  27.2  57 327.8 202.2  2.4
1997 Feb  4  19 48 04.04 +16 57 57.6  1.945 -34.23  1.332  39.0  27.8  47 327.4 203.2  2.4
1997 Feb  5  19 50 41.45 +17 29 01.7  1.925 -34.22  1.320  39.4  28.3  40 327.0 204.1  2.3
1997 Feb  6  19 53 22.59 +18 00 46.8  1.906 -34.19  1.309  39.7  28.8  35 326.7 205.1  2.3
1997 Feb  7  19 56 07.64 +18 33 13.5  1.886 -34.15  1.297  40.1  29.3  35 326.4 206.2  2.2
1997 Feb  8  19 58 56.79 +19 06 22.2  1.866 -34.08  1.286  40.4  29.8  39 326.1 207.2  2.2
1997 Feb  9  20 01 50.23 +19 40 13.5  1.846 -33.98  1.274  40.8  30.4  47 325.9 208.2  2.1
1997 Feb 10  20 04 48.18 +20 14 47.6  1.827 -33.86  1.263  41.1  30.9  57 325.7 209.2  2.1
1997 Feb 11  20 07 50.85 +20 50 04.9  1.807 -33.72  1.251  41.4  31.5  68 325.5 210.2  2.0
1997 Feb 12  20 10 58.49 +21 26 05.4  1.788 -33.55  1.240  41.8  32.0  78 325.3 211.3  2.0
1997 Feb 13  20 14 11.34 +22 02 49.4  1.769 -33.35  1.229  42.1  32.6  88 325.2 212.3  1.9
1997 Feb 14  20 17 29.69 +22 40 16.6  1.749 -33.12  1.218  42.4  33.1  98 325.2 213.4  1.9
1997 Feb 15  20 20 53.80 +23 18 26.9  1.730 -32.87  1.207  42.7  33.7 107 325.1 214.5  1.8
1997 Feb 16  20 24 24.00 +23 57 20.0  1.711 -32.58  1.196  43.0  34.3 116 325.2 215.6  1.8
1997 Feb 17  20 28 00.58 +24 36 55.2  1.693 -32.26  1.186  43.3  34.8 123 325.2 216.7  1.7
1997 Feb 18  20 31 43.89 +25 17 11.8  1.674 -31.91  1.175  43.5  35.4 130 325.3 217.8  1.6
1997 Feb 19  20 35 34.29 +25 58 08.8  1.656 -31.52  1.164  43.8  36.0 135 325.4 218.9  1.6
1997 Feb 20  20 39 32.15 +26 39 45.0  1.638 -31.11  1.154  44.0  36.6 138 325.6 220.0  1.5
1997 Feb 21  20 43 37.85 +27 21 58.7  1.620 -30.65  1.144  44.3  37.1 140 325.8 221.2  1.5
1997 Feb 22  20 47 51.82 +28 04 48.1  1.602 -30.16  1.134  44.5  37.7 139 326.1 222.4  1.4
1997 Feb 23  20 52 14.48 +28 48 11.1  1.585 -29.63  1.124  44.7  38.3 136 326.4 223.6  1.4
1997 Feb 24  20 56 46.27 +29 32 04.9  1.568 -29.06  1.114  44.9  38.9 131 326.8 224.8  1.3
1997 Feb 25  21 01 27.66 +30 16 26.5  1.552 -28.45  1.104  45.1  39.4 125 327.2 226.0  1.3
1997 Feb 26  21 06 19.13 +31 01 12.4  1.535 -27.80  1.095  45.3  40.0 119 327.7 227.3  1.2
1997 Feb 27  21 11 21.17 +31 46 18.6  1.519 -27.11  1.086  45.5  40.6 112 328.3 228.6  1.2
1997 Feb 28  21 16 34.30 +32 31 40.4  1.504 -26.38  1.076  45.6  41.1 104 328.9 229.9  1.1
1997 Mar  1  21 21 59.01 +33 17 12.8  1.489 -25.61  1.067  45.7  41.7  96 329.5 231.3  1.1
1997 Mar  2  21 27 35.82 +34 02 50.0  1.474 -24.79  1.059  45.9  42.2  88 330.3 232.7  1.0
1997 Mar  3  21 33 25.25 +34 48 25.5  1.460 -23.93  1.050  46.0  42.7  80 331.1 234.1  1.0
1997 Mar  4  21 39 27.80 +35 33 52.3  1.447 -23.03  1.042  46.0  43.3  72 331.9 235.6   .9
1997 Mar  5  21 45 43.95 +36 19 02.5  1.434 -22.08  1.033  46.1  43.8  64 332.9 237.1   .9
1997 Mar  6  21 52 14.15 +37 03 47.6  1.421 -21.09  1.025  46.2  44.3  57 333.9 238.7   .8
1997 Mar  7  21 58 58.84 +37 47 58.5  1.409 -20.06  1.018  46.2  44.7  51 335.0 240.3   .8
1997 Mar  8  22 05 58.36 +38 31 25.1  1.398 -18.99  1.010  46.2  45.2  47 336.2 241.9   .8
1997 Mar  9  22 13 13.04 +39 13 57.0  1.387 -17.88  1.003  46.2  45.7  45 337.5 243.7   .7
1997 Mar 10  22 20 43.07 +39 55 22.8  1.377 -16.73   .996  46.2  46.1  46 338.8 245.4   .7
1997 Mar 11  22 28 28.60 +40 35 30.7  1.368 -15.54   .989  46.2  46.5  50 340.2 247.2   .6
1997 Mar 12  22 36 29.62 +41 14 08.6  1.360 -14.31   .982  46.2  46.9  55 341.8 249.1   .6
1997 Mar 13  22 44 46.01 +41 51 03.9  1.352 -13.05   .976  46.1  47.2  62 343.4 251.0   .6
1997 Mar 14  22 53 17.48 +42 26 03.8  1.344 -11.76   .970  46.0  47.6  69 345.1 253.0   .5
1997 Mar 15  23 02 03.60 +42 58 55.6  1.338 -10.45   .964  46.0  47.9  76 346.8 255.1   .5
1997 Mar 16  23 11 03.72 +43 29 26.7  1.332  -9.10   .959  45.9  48.1  83 348.7 257.1   .5
1997 Mar 17  23 20 17.03 +43 57 24.9  1.328  -7.74   .953  45.7  48.4  90 350.6 259.3   .5
1997 Mar 18  23 29 42.49 +44 22 38.6  1.323  -6.35   .948  45.6  48.6  97 352.6 261.5   .4
1997 Mar 19  23 39 18.89 +44 44 57.2  1.320  -4.96   .944  45.5  48.8 104 354.7 263.7   .4
1997 Mar 20  23 49 04.80 +45 04 11.1  1.318  -3.55   .940  45.3  48.9 110 356.8 266.0   .4
1997 Mar 21  23 58 58.62 +45 20 12.0  1.316  -2.13   .936  45.2  49.0 117 359.0 268.3   .4
1997 Mar 22  00 08 58.59 +45 32 53.1  1.315   -.72   .932  45.0  49.1 123   1.3 270.6   .4
1997 Mar 23  00 19 02.84 +45 42 09.4  1.315    .70   .929  44.8  49.1 129   3.6 273.0   .4
1997 Mar 24  00 29 09.38 +45 47 57.5  1.316   2.11   .926  44.6  49.1 134   5.9 275.4   .3
1997 Mar 25  00 39 16.18 +45 50 16.2  1.318   3.51   .923  44.4  49.1 138   8.2 277.7   .3
1997 Mar 26  00 49 21.21 +45 49 06.0  1.320   4.89   .921  44.1  49.0 140  10.6 280.1   .3
1997 Mar 27  00 59 22.47 +45 44 29.4  1.323   6.26   .919  43.9  48.9 141  13.0 282.5   .3
1997 Mar 28  01 09 18.03 +45 36 30.6  1.327   7.60   .917  43.7  48.7 138  15.3 284.8   .3
1997 Mar 29  01 19 06.07 +45 25 15.6  1.332   8.92   .916  43.4  48.5 134  17.7 287.1   .3
1997 Mar 30  01 28 44.92 +45 10 51.9  1.338  10.21   .915  43.1  48.3 128  20.0 289.4   .3
1997 Mar 31  01 38 13.11 +44 53 28.3  1.344  11.46   .914  42.9  48.0 120  22.3 291.7   .4
1997 Apr  1  01 47 29.30 +44 33 14.7  1.351  12.68   .914  42.6  47.7 111  24.6 293.9   .4
1997 Apr  2  01 56 32.42 +44 10 21.8  1.359  13.87   .914  42.3  47.4 101  26.9 296.1   .4
1997 Apr  3  02 05 21.54 +43 45 01.1  1.367  15.01   .915  42.0  47.0  91  29.1 298.2   .4
1997 Apr  4  02 13 55.96 +43 17 24.2  1.376  16.11   .916  41.7  46.6  80  31.3 300.3   .4
1997 Apr  5  02 22 15.17 +42 47 43.2  1.385  17.16   .917  41.4  46.2  69  33.4 302.3   .4
1997 Apr  6  02 30 18.84 +42 16 10.0  1.396  18.17   .918  41.1  45.7  57  35.5 304.2   .4
1997 Apr  7  02 38 06.77 +41 42 56.3  1.406  19.14   .920  40.7  45.2  46  37.6 306.1   .5
1997 Apr  8  02 45 38.94 +41 08 13.8  1.418  20.06   .922  40.4  44.7  37  39.6 308.0   .5
1997 Apr  9  02 52 55.43 +40 32 13.3  1.430  20.93   .925  40.1  44.2  29  41.5 309.8   .5
1997 Apr 10  02 59 56.45 +39 55 05.5  1.442  21.75   .928  39.7  43.6  26  43.4 311.5   .6
1997 Apr 11  03 06 42.28 +39 17 00.3  1.455  22.53   .931  39.4  43.1  29  45.3 313.2   .6
1997 Apr 12  03 13 13.28 +38 38 07.0  1.468  23.26   .935  39.0  42.5  35  47.1 314.8   .6
1997 Apr 13  03 19 29.87 +37 58 34.4  1.482  23.94   .938  38.7  41.9  43  48.9 316.4   .6
1997 Apr 14  03 25 32.50 +37 18 30.3  1.496  24.58   .943  38.3  41.3  52  50.6 317.9   .7
1997 Apr 15  03 31 21.69 +36 38 02.3  1.510  25.18   .947  37.9  40.6  62  52.3 319.4   .7
1997 Apr 16  03 36 57.93 +35 57 17.1  1.525  25.73   .952  37.6  40.0  72  54.0 320.8   .8
1997 Apr 17  03 42 21.75 +35 16 20.7  1.540  26.24   .957  37.2  39.4  82  55.6 322.1   .8
1997 Apr 18  03 47 33.69 +34 35 18.6  1.555  26.71   .962  36.8  38.7  92  57.2 323.5   .8
1997 Apr 19  03 52 34.29 +33 54 15.9  1.571  27.15   .968  36.4  38.0 102  58.7 324.8   .9
1997 Apr 20  03 57 24.06 +33 13 16.8  1.586  27.54   .974  36.1  37.4 113  60.3 326.0   .9
1997 Apr 21  04 02 03.52 +32 32 25.4  1.602  27.89   .980  35.7  36.7 124  61.8 327.2  1.0
1997 Apr 22  04 06 33.18 +31 51 44.9  1.619  28.21   .987  35.3  36.0 135  63.3 328.4  1.0
1997 Apr 23  04 10 53.52 +31 11 18.6  1.635  28.50   .994  34.9  35.4 146  64.8 329.5  1.0
1997 Apr 24  04 15 05.01 +30 31 08.8  1.651  28.75  1.001  34.5  34.7 156  66.2 330.6  1.1
1997 Apr 25  04 19 08.12 +29 51 18.0  1.668  28.98  1.008  34.1  34.0 165  67.7 331.6  1.1
1997 Apr 26  04 23 03.26 +29 11 48.0  1.685  29.17  1.015  33.7  33.4 167  69.1 332.7  1.2
1997 Apr 27  04 26 50.86 +28 32 40.5  1.702  29.33  1.023  33.3  32.7 159  70.5 333.6  1.2
1997 Apr 28  04 30 31.31 +27 53 56.7  1.719  29.47  1.031  32.9  32.1 148  71.9 334.6  1.3
1997 Apr 29  04 34 04.99 +27 15 37.9  1.736  29.58  1.039  32.5  31.4 136  73.3 335.5  1.3
1997 Apr 30  04 37 32.26 +26 37 44.8  1.753  29.66  1.048  32.1  30.8 123  74.7 336.4  1.4
1997 May  1  04 40 53.44 +26 00 18.2  1.770  29.72  1.056  31.8  30.1 110  76.1 337.3  1.4
1997 May  2  04 44 08.88 +25 23 18.6  1.787  29.76  1.065  31.4  29.5  96  77.5 338.2  1.5
1997 May  3  04 47 18.85 +24 46 46.3  1.804  29.77  1.074  31.0  28.9  82  78.9 339.0  1.5
1997 May  4  04 50 23.66 +24 10 41.5  1.822  29.77  1.083  30.6  28.3  69  80.3 339.8  1.6
1997 May  5  04 53 23.56 +23 35 04.4  1.839  29.74  1.092  30.2  27.7  55  81.7 340.6  1.6
1997 May  6  04 56 18.81 +22 59 54.8  1.856  29.70  1.102  29.8  27.1  41  83.1 341.3  1.7
1997 May  7  04 59 09.65 +22 25 12.7  1.873  29.64  1.111  29.4  26.5  28  84.5 342.1  1.7
1997 May  8  05 01 56.30 +21 50 57.9  1.890  29.56  1.121  29.1  25.9  15  85.9 342.8  1.8
1997 May  9  05 04 38.97 +21 17 10.0  1.907  29.47  1.131  28.7  25.4   4  87.3 343.5  1.8
1997 May 10  05 07 17.85 +20 43 48.8  1.924  29.37  1.141  28.3  24.8  12  88.8 344.1  1.9
1997 May 11  05 09 53.14 +20 10 53.8  1.941  29.25  1.151  28.0  24.3  23  90.2 344.8  1.9
1997 May 12  05 12 25.02 +19 38 24.6  1.958  29.12  1.161  27.6  23.8  35  91.7 345.4  1.9
1997 May 13  05 14 53.64 +19 06 20.7  1.975  28.97  1.172  27.3  23.3  47  93.2 346.0  2.0
1997 May 14  05 17 19.16 +18 34 41.6  1.992  28.82  1.183  26.9  22.8  58  94.7 346.6  2.0
1997 May 15  05 19 41.74 +18 03 26.8  2.008  28.66  1.193  26.6  22.3  70  96.2 347.2  2.1
1997 May 16  05 22 01.52 +17 32 35.7  2.025  28.49  1.204  26.3  21.8  81  97.7 347.8  2.1
1997 May 17  05 24 18.62 +17 02 07.8  2.041  28.31  1.215  25.9  21.3  92  99.2 348.4  2.2
1997 May 18  05 26 33.18 +16 32 02.5  2.057  28.12  1.226  25.6  20.9 104 100.8 348.9  2.2
1997 May 19  05 28 45.31 +16 02 19.2  2.074  27.92  1.237  25.3  20.5 116 102.4 349.4  2.3
1997 May 20  05 30 55.12 +15 32 57.3  2.090  27.72  1.248  25.0  20.0 128 104.0 350.0  2.3
1997 May 21  05 33 02.72 +15 03 56.2  2.106  27.51  1.259  24.7  19.6 140 105.6 350.5  2.4
1997 May 22  05 35 08.21 +14 35 15.3  2.121  27.30  1.271  24.4  19.2 152 107.2 350.9  2.4
1997 May 23  05 37 11.69 +14 06 54.0  2.137  27.08  1.282  24.2  18.9 165 108.9 351.4  2.5
1997 May 24  05 39 13.24 +13 38 51.7  2.153  26.85  1.294  23.9  18.5 175 110.6 351.9  2.5
1997 May 25  05 41 12.95 +13 11 07.9  2.168  26.62  1.305  23.7  18.1 167 112.3 352.3  2.5
1997 May 26  05 43 10.91 +12 43 41.9  2.183  26.39  1.317  23.4  17.8 154 114.0 352.8  2.6
1997 May 27  05 45 07.18 +12 16 33.1  2.199  26.15  1.329  23.2  17.5 141 115.8 353.2  2.6
1997 May 28  05 47 01.84 +11 49 41.1  2.214  25.90  1.340  23.0  17.2 127 117.5 353.7  2.7
1997 May 29  05 48 54.96 +11 23 05.1  2.228  25.65  1.352  22.8  16.9 114 119.3 354.1  2.7
1997 May 30  05 50 46.61 +10 56 44.6  2.243  25.40  1.364  22.6  16.6 100 121.2 354.5  2.8
1997 May 31  05 52 36.83 +10 30 39.2  2.258  25.15  1.376  22.4  16.3  86 123.0 354.9  2.8
1997 Jun  1  05 54 25.70 +10 04 48.1  2.272  24.89  1.388  22.3  16.1  73 124.8 355.2  2.9
1997 Jun  2  05 56 13.25 +09 39 10.9  2.287  24.62  1.400  22.1  15.8  60 126.7 355.6  2.9
1997 Jun  3  05 57 59.54 +09 13 47.1  2.301  24.36  1.412  22.0  15.6  46 128.6 356.0  2.9
1997 Jun  4  05 59 44.61 +08 48 36.1  2.315  24.09  1.424  21.9  15.4  34 130.5 356.4  3.0
1997 Jun  5  06 01 28.51 +08 23 37.3  2.329  23.82  1.437  21.8  15.2  22 132.4 356.7  3.0
1997 Jun  6  06 03 11.28 +07 58 50.4  2.342  23.55  1.449  21.7  15.0  12 134.3 357.1  3.1
1997 Jun  7  06 04 52.95 +07 34 14.8  2.356  23.28  1.461  21.6  14.8  12 136.2 357.4  3.1
1997 Jun  8  06 06 33.56 +07 09 50.1  2.369  23.01  1.473  21.6  14.7  21 138.2 357.7  3.1
1997 Jun  9  06 08 13.14 +06 45 35.7  2.382  22.73  1.486  21.6  14.5  32 140.1 358.0  3.2
1997 Jun 10  06 09 51.73 +06 21 31.3  2.395  22.46  1.498  21.5  14.4  43 142.0 358.4  3.2
1997 Jun 11  06 11 29.36 +05 57 36.3  2.408  22.18  1.510  21.5  14.3  54 144.0 358.7  3.3
1997 Jun 12  06 13 06.05 +05 33 50.4  2.421  21.91  1.523  21.6  14.2  65 145.9 359.0  3.3
1997 Jun 13  06 14 41.84 +05 10 13.1  2.434  21.63  1.535  21.6  14.1  77 147.8 359.3  3.3
1997 Jun 14  06 16 16.75 +04 46 44.0  2.446  21.36  1.548  21.6  14.0  88 149.8 359.6  3.4
1997 Jun 15  06 17 50.81 +04 23 22.8  2.458  21.08  1.560  21.7  13.9  99 151.7 359.8  3.4
1997 Jun 16  06 19 24.04 +04 00 09.1  2.470  20.81  1.573  21.8  13.9 111 153.6    .1  3.4
1997 Jun 17  06 20 56.46 +03 37 02.4  2.482  20.54  1.585  21.9  13.8 122 155.4    .4  3.5
1997 Jun 18  06 22 28.09 +03 14 02.4  2.494  20.27  1.598  22.0  13.8 134 157.3    .7  3.5
1997 Jun 19  06 23 58.97 +02 51 08.8  2.506  20.00  1.610  22.1  13.7 145 159.2    .9  3.5
1997 Jun 20  06 25 29.10 +02 28 21.2  2.517  19.73  1.623  22.3  13.7 156 161.0   1.2  3.6
1997 Jun 21  06 26 58.52 +02 05 39.2  2.528  19.46  1.636  22.4  13.7 163 162.8   1.4  3.6
1997 Jun 22  06 28 27.23 +01 43 02.6  2.540  19.19  1.648  22.6  13.7 161 164.6   1.7  3.7
1997 Jun 23  06 29 55.26 +01 20 31.0  2.551  18.92  1.661  22.8  13.7 151 166.3   1.9  3.7
1997 Jun 24  06 31 22.62 +00 58 04.1  2.561  18.66  1.673  23.0  13.7 139 168.1   2.2  3.7
1997 Jun 25  06 32 49.34 +00 35 41.5  2.572  18.39  1.686  23.2  13.7 126 169.8   2.4  3.8
1997 Jun 26  06 34 15.42 +00 13 23.0  2.583  18.13  1.699  23.4  13.8 113 171.5   2.6  3.8
1997 Jun 27  06 35 40.88 -00 08 51.7  2.593  17.86  1.711  23.7  13.8 100 173.1   2.9  3.8
1997 Jun 28  06 37 05.73 -00 31 03.0  2.603  17.60  1.724  23.9  13.8  87 174.7   3.1  3.9
1997 Jun 29  06 38 29.99 -00 53 11.1  2.613  17.34  1.737  24.2  13.9  74 176.3   3.3  3.9
1997 Jun 30  06 39 53.66 -01 15 16.3  2.623  17.07  1.749  24.5  13.9  62 177.9   3.5  3.9
1997 Jul  1  06 41 16.75 -01 37 19.0  2.633  16.81  1.762  24.7  14.0  50 179.4   3.7  3.9
1997 Jul  2  06 42 39.27 -01 59 19.2  2.643  16.55  1.775  25.0  14.0  39 180.9   3.9  4.0
1997 Jul  3  06 44 01.23 -02 21 17.4  2.652  16.30  1.787  25.3  14.1  29 182.4   4.1  4.0
1997 Jul  4  06 45 22.64 -02 43 13.8  2.662  16.04  1.800  25.7  14.2  23 183.9   4.3  4.0
1997 Jul  5  06 46 43.49 -03 05 08.6  2.671  15.79  1.813  26.0  14.2  22 185.3   4.5  4.1
1997 Jul  6  06 48 03.80 -03 27 02.0  2.680  15.53  1.825  26.3  14.3  26 186.7   4.7  4.1
1997 Jul  7  06 49 23.57 -03 48 54.3  2.689  15.28  1.838  26.7  14.4  34 188.0   4.9  4.1
1997 Jul  8  06 50 42.81 -04 10 45.6  2.697  15.04  1.851  27.0  14.5  44 189.4   5.1  4.2
1997 Jul  9  06 52 01.52 -04 32 36.3  2.706  14.79  1.863  27.4  14.5  54 190.7   5.3  4.2
1997 Jul 10  06 53 19.70 -04 54 26.4  2.715  14.55  1.876  27.8  14.6  64 192.0   5.5  4.2
1997 Jul 11  06 54 37.35 -05 16 16.2  2.723  14.31  1.889  28.2  14.7  75 193.2   5.6  4.2
1997 Jul 12  06 55 54.49 -05 38 05.9  2.731  14.07  1.901  28.6  14.8  85 194.4   5.8  4.3
1997 Jul 13  06 57 11.12 -05 59 55.6  2.739  13.84  1.914  28.9  14.9  96 195.6   6.0  4.3
1997 Jul 14  06 58 27.23 -06 21 45.6  2.747  13.61  1.927  29.4  15.0 107 196.8   6.2  4.3
1997 Jul 15  06 59 42.83 -06 43 35.9  2.755  13.38  1.939  29.8  15.1 118 198.0   6.3  4.4
1997 Jul 16  07 00 57.93 -07 05 26.8  2.763  13.15  1.952  30.2  15.2 128 199.1   6.5  4.4
1997 Jul 17  07 02 12.53 -07 27 18.5  2.770  12.93  1.965  30.6  15.3 139 200.2   6.6  4.4
1997 Jul 18  07 03 26.63 -07 49 11.0  2.777  12.71  1.977  31.0  15.4 148 201.3   6.8  4.4
1997 Jul 19  07 04 40.23 -08 11 04.5  2.785  12.50  1.990  31.5  15.5 153 202.3   7.0  4.5
1997 Jul 20  07 05 53.34 -08 32 59.2  2.792  12.28  2.002  31.9  15.6 153 203.4   7.1  4.5
1997 Jul 21  07 07 05.96 -08 54 55.3  2.799  12.07  2.015  32.3  15.6 146 204.4   7.3  4.5
1997 Jul 22  07 08 18.09 -09 16 52.8  2.806  11.86  2.028  32.8  15.7 136 205.4   7.4  4.5
1997 Jul 23  07 09 29.74 -09 38 52.0  2.813  11.66  2.040  33.2  15.8 124 206.4   7.6  4.6
1997 Jul 24  07 10 40.91 -10 00 53.0  2.819  11.45  2.053  33.7  15.9 112 207.4   7.7  4.6
1997 Jul 25  07 11 51.60 -10 22 55.8  2.826  11.25  2.065  34.1  16.0  99 208.3   7.8  4.6
1997 Jul 26  07 13 01.80 -10 45 00.8  2.832  11.05  2.078  34.6  16.1  87 209.3   8.0  4.6
1997 Jul 27  07 14 11.52 -11 07 07.9  2.839  10.86  2.091  35.1  16.2  75 210.2   8.1  4.7
1997 Jul 28  07 15 20.75 -11 29 17.4  2.845  10.66  2.103  35.5  16.3  64 211.1   8.3  4.7
1997 Jul 29  07 16 29.49 -11 51 29.3  2.851  10.47  2.116  36.0  16.4  54 212.0   8.4  4.7
1997 Jul 30  07 17 37.75 -12 13 43.9  2.857  10.28  2.128  36.5  16.5  44 212.9   8.5  4.7
1997 Jul 31  07 18 45.51 -12 36 01.1  2.863  10.10  2.141  37.0  16.6  37 213.7   8.7  4.8
1997 Aug  1  07 19 52.77 -12 58 21.0  2.869   9.91  2.153  37.5  16.7  32 214.6   8.8  4.8






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             = Moon-Earth-Object angle in degrees

PsAng            = Position angle of extended radius vector in degrees
                   This will be the approximate position angle of an ion tail

PsAMV            = Position angle of minus velocity vector in degrees.
                   A dust tail will have an approximate position angle
                   located between the position angles defined by PsAng and PsAMV.

TMag             = Total magnitude
                 = 0.0 + 5.00*log(Delta) +  7.5*log(r)

 
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