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)