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Orbital and Ephemeris Information for Comet 1996 B2 Hyakutake

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Orbit and Ephemeris Updates for Comet 1996 B2 Hyakutake

Don Yeomans - JPL
Mar. 22, 1996

Additional observations through March 21, 1996 have been supplied by the Minor Planet Center and used to update the orbit, ephemeris, and error analysis.


 Object: Comet 1996 B2 Hyakutake
 Ref. Solution: 18
 Planetary Ephemeris: DE403
 No. Observations:   354
 Observation Arc:  1996 Jan  1 - 1996 Mar 21

 ---- Residual Summary ----       RA        Dec      Total
 Mean                            -.002      .002      .003
 RMS, unweighted                  .589      .579      .584

 ---- Corrected Elements (J2000):  Solution 18
   Epoch  2450206.50000 = 1996 May  3.00000
                          Post-Fit Std.Dev.
e     .999671850       .000012479
q     .230041917       .000008981
Tp    2450204.8964547  .0001899    1996 May  1.39645
Node  188.0431101      .0001308
w     130.2089094      .0017327
i     124.9102093      .0007311


 ---- Elements at other epochs:
Epoch (TDB)     e         q         Node         w          i              Tp
1996 Mar 23.0  .9996750 .2300593 188.042853 130.206166 124.909215  1996 May  1.396822
1996 Mar 25.0  .9996772 .2300560 188.042902 130.206495 124.909634  1996 May  1.396655
1996 Mar 27.0  .9996768 .2300504 188.042940 130.207282 124.909905  1996 May  1.396522
1996 Mar 30.0  .9996747 .2300458 188.042944 130.208038 124.909932  1996 May  1.396472
1996 Apr 27.0  .9996717 .2300419 188.043104 130.208911 124.910211  1996 May  1.396455

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)



The apparent total magnitude predictions in the following ephemeris are rough
estimates.  The peculiar trend in the uncertainties is due to the close Earth
approach on March 25 and the extreme high declinations on March 27.  One sigma
positional uncertainties for selected dates follow:

Date            1-sigma uncertainties
                   R.A.    Dec.
     Mar. 23        1"      2"
     Mar. 25        1"      4"
     Mar. 26        2"      5"
     Mar. 27        8"      2"
     Mar. 28        2"      4"
     Mar. 30        1"      3"
     Apr.  4        1"      2"



Ephemeris (with perturbations) for Comet 1996 B2 Hyakutake
JPL Ref. orbit No. 18 by D.K. Yeomans, Mar. 22, 1996
Ephemeris output times are UTC (not TT).

 Date (UT)  Hr      R.A. J2000  Dec.    Delta  Deldot    r   Theta Beta Moon PsAng TMag
1996 Mar 21 00  14 52 14.80 +05 06 41.6  .175 -46.730  1.131 137.3  36.7 153 264.0  1.7
1996 Mar 21 02  14 52 07.88 +05 38 40.7  .173 -46.412  1.129 137.3  36.7 153 263.4  1.7
1996 Mar 21 04  14 52 00.74 +06 11 30.1  .170 -46.081  1.128 137.4  36.7 154 262.7  1.7
1996 Mar 21 06  14 51 53.36 +06 45 11.4  .168 -45.738  1.126 137.4  36.8 154 262.0  1.6
1996 Mar 21 08  14 51 45.73 +07 19 46.3  .166 -45.381  1.124 137.4  36.8 155 261.3  1.6
1996 Mar 21 10  14 51 37.83 +07 55 16.4  .164 -45.009  1.122 137.4  36.9 155 260.6  1.6
1996 Mar 21 12  14 51 29.67 +08 31 43.5  .162 -44.624  1.121 137.4  37.0 155 259.9  1.5
1996 Mar 21 14  14 51 21.22 +09 09 09.4  .159 -44.222  1.119 137.4  37.1 155 259.1  1.5
1996 Mar 21 16  14 51 12.48 +09 47 36.0  .157 -43.805  1.117 137.4  37.1 155 258.3  1.5
1996 Mar 21 18  14 51 03.43 +10 27 05.1  .155 -43.371  1.116 137.4  37.2 155 257.6  1.4
1996 Mar 21 20  14 50 54.05 +11 07 38.7  .153 -42.919  1.114 137.3  37.3 155 256.7  1.4
1996 Mar 21 22  14 50 44.34 +11 49 18.6  .151 -42.448  1.112 137.2  37.5 154 255.9  1.4
1996 Mar 22 00  14 50 34.27 +12 32 06.9  .149 -41.959  1.110 137.2  37.6 154 255.1  1.3
1996 Mar 22 02  14 50 23.84 +13 16 05.5  .147 -41.450  1.109 137.1  37.7 153 254.2  1.3
1996 Mar 22 04  14 50 13.01 +14 01 16.6  .145 -40.920  1.107 137.0  37.9 153 253.3  1.2
1996 Mar 22 06  14 50 01.77 +14 47 42.0  .143 -40.368  1.105 136.8  38.1 152 252.4  1.2
1996 Mar 22 08  14 49 50.10 +15 35 23.9  .141 -39.793  1.104 136.7  38.3 151 251.5  1.2
1996 Mar 22 10  14 49 37.98 +16 24 24.3  .139 -39.195  1.102 136.5  38.5 150 250.6  1.1
1996 Mar 22 12  14 49 25.39 +17 14 45.1  .137 -38.572  1.100 136.3  38.7 150 249.6  1.1
1996 Mar 22 14  14 49 12.29 +18 06 28.4  .136 -37.924  1.098 136.1  39.0 149 248.6  1.1
1996 Mar 22 16  14 48 58.67 +18 59 36.1  .134 -37.250  1.097 135.9  39.2 148 247.7  1.0
1996 Mar 22 18  14 48 44.48 +19 54 10.2  .132 -36.548  1.095 135.7  39.5 146 246.7  1.0
1996 Mar 22 20  14 48 29.71 +20 50 12.3  .130 -35.818  1.093 135.4  39.8 145 245.6  1.0
1996 Mar 22 22  14 48 14.30 +21 47 44.3  .129 -35.059  1.092 135.1  40.2 144 244.6   .9
1996 Mar 23 00  14 47 58.24 +22 46 47.8  .127 -34.270  1.090 134.7  40.5 143 243.6   .9
1996 Mar 23 02  14 47 41.47 +23 47 24.2  .125 -33.449  1.088 134.4  40.9 141 242.5   .9
1996 Mar 23 04  14 47 23.96 +24 49 34.9  .124 -32.597  1.086 134.0  41.3 140 241.5   .8
1996 Mar 23 06  14 47 05.65 +25 53 21.0  .122 -31.712  1.085 133.6  41.7 139 240.4   .8
1996 Mar 23 08  14 46 46.49 +26 58 43.5  .121 -30.794  1.083 133.1  42.2 137 239.4   .8
1996 Mar 23 10  14 46 26.43 +28 05 43.1  .119 -29.841  1.081 132.7  42.7 136 238.3   .7
1996 Mar 23 12  14 46 05.41 +29 14 20.2  .118 -28.854  1.079 132.1  43.2 134 237.3   .7
1996 Mar 23 14  14 45 43.36 +30 24 35.1  .116 -27.832  1.078 131.6  43.8 133 236.2   .7
1996 Mar 23 16  14 45 20.20 +31 36 27.5  .115 -26.774  1.076 131.0  44.3 131 235.1   .6
1996 Mar 23 18  14 44 55.85 +32 49 56.9  .114 -25.680  1.074 130.4  45.0 129 234.1   .6
1996 Mar 23 20  14 44 30.22 +34 05 02.5  .113 -24.551  1.073 129.8  45.6 128 233.0   .6
1996 Mar 23 22  14 44 03.22 +35 21 42.9  .111 -23.385  1.071 129.1  46.3 126 232.0   .5
1996 Mar 24 00  14 43 34.74 +36 39 56.3  .110 -22.185  1.069 128.4  47.0 124 230.9   .5
1996 Mar 24 02  14 43 04.65 +37 59 40.6  .109 -20.949  1.067 127.6  47.7 123 229.9   .5
1996 Mar 24 04  14 42 32.82 +39 20 53.1  .108 -19.679  1.066 126.8  48.5 121 228.9   .4
1996 Mar 24 06  14 41 59.10 +40 43 30.5  .107 -18.376  1.064 126.0  49.3 119 227.9   .4
1996 Mar 24 08  14 41 23.32 +42 07 29.1  .107 -17.041  1.062 125.2  50.1 117 226.9   .4
1996 Mar 24 10  14 40 45.29 +43 32 44.7  .106 -15.675  1.060 124.3  51.0 116 225.9   .4
1996 Mar 24 12  14 40 04.80 +44 59 12.4  .105 -14.279  1.059 123.4  51.9 114 225.0   .4
1996 Mar 24 14  14 39 21.61 +46 26 47.1  .104 -12.857  1.057 122.4  52.8 112 224.0   .3
1996 Mar 24 16  14 38 35.44 +47 55 23.0  .104 -11.409  1.055 121.5  53.7 110 223.1   .3
1996 Mar 24 18  14 37 45.98 +49 24 53.6  .103  -9.939  1.053 120.5  54.7 108 222.2   .3
1996 Mar 24 20  14 36 52.89 +50 55 12.4  .103  -8.448  1.052 119.4  55.7 107 221.3   .3
1996 Mar 24 22  14 35 55.73 +52 26 12.0  .102  -6.940  1.050 118.4  56.7 105 220.4   .3
1996 Mar 25 00  14 34 54.05 +53 57 45.1  .102  -5.418  1.048 117.3  57.7 103 219.5   .3
1996 Mar 25 02  14 33 47.30 +55 29 43.7  .102  -3.885  1.046 116.2  58.8 101 218.6   .2
1996 Mar 25 04  14 32 34.82 +57 01 59.6  .102  -2.343  1.045 115.1  59.8  99 217.8   .2
1996 Mar 25 06  14 31 15.87 +58 34 24.6  .102   -.797  1.043 114.0  60.9  98 216.9   .2
1996 Mar 25 08  14 29 49.54 +60 06 50.0  .102    .751  1.041 112.8  62.0  96 216.0   .2
1996 Mar 25 10  14 28 14.77 +61 39 07.2  .102   2.297  1.039 111.7  63.1  94 215.2   .2
1996 Mar 25 12  14 26 30.29 +63 11 07.5  .102   3.837  1.038 110.5  64.2  93 214.3   .2
1996 Mar 25 14  14 24 34.53 +64 42 42.1  .102   5.368  1.036 109.4  65.3  91 213.4   .2
1996 Mar 25 16  14 22 25.59 +66 13 42.4  .102   6.888  1.034 108.2  66.4  89 212.5   .2
1996 Mar 25 18  14 20 01.14 +67 43 59.6  .103   8.392  1.032 107.0  67.5  88 211.5   .2
1996 Mar 25 20  14 17 18.23 +69 13 25.1  .103   9.878  1.031 105.9  68.6  86 210.5   .2
1996 Mar 25 22  14 14 13.17 +70 41 50.3  .104  11.344  1.029 104.7  69.7  85 209.5   .2
1996 Mar 26 00  14 10 41.19 +72 09 06.3  .104  12.786  1.027 103.6  70.8  83 208.3   .2
1996 Mar 26 02  14 06 36.10 +73 35 04.3  .105  14.203  1.025 102.4  71.9  82 207.0   .2
1996 Mar 26 04  14 01 49.71 +74 59 34.6  .106  15.592  1.024 101.3  72.9  80 205.6   .2
1996 Mar 26 06  13 56 10.95 +76 22 26.9  .107  16.951  1.022 100.1  74.0  79 204.0   .2
1996 Mar 26 08  13 49 24.59 +77 43 29.2  .107  18.279  1.020  99.0  75.0  78 202.1   .2
1996 Mar 26 10  13 41 09.15 +79 02 27.1  .108  19.575  1.018  97.9  76.1  77 199.9   .3
1996 Mar 26 12  13 30 53.59 +80 19 01.4  .109  20.837  1.017  96.8  77.1  76 197.2   .3
1996 Mar 26 14  13 17 51.89 +81 32 45.6  .110  22.064  1.015  95.7  78.1  74 193.8   .3
1996 Mar 26 16  13 00 54.17 +82 43 00.0  .111  23.256  1.013  94.7  79.0  73 189.4   .3
1996 Mar 26 18  12 38 12.82 +83 48 41.7  .113  24.412  1.011  93.6  80.0  73 183.7   .3
1996 Mar 26 20  12 07 04.65 +84 48 05.8  .114  25.532  1.009  92.6  80.9  72 175.8   .3
1996 Mar 26 22  11 23 46.13 +85 38 15.8  .115  26.617  1.008  91.6  81.9  71 164.9   .3
1996 Mar 27 00  10 24 54.91 +86 14 32.9  .116  27.665  1.006  90.6  82.8  70 150.1   .4
1996 Mar 27 02  09 12 22.97 +86 31 18.8  .118  28.677  1.004  89.6  83.6  69 132.0   .4
1996 Mar 27 04  07 57 49.76 +86 25 33.6  .119  29.655  1.002  88.7  84.5  69 113.3   .4
1996 Mar 27 06  06 54 46.12 +86 00 17.6  .120  30.597  1.001  87.8  85.3  68  97.5   .4
1996 Mar 27 08  06 07 33.30 +85 21 55.7  .122  31.505   .999  86.9  86.1  68  85.7   .4
1996 Mar 27 10  05 33 34.27 +84 36 02.6  .124  32.380   .997  86.0  86.9  67  77.2   .4
1996 Mar 27 12  05 08 56.47 +83 46 12.0  .125  33.222   .995  85.1  87.7  67  71.1   .5
1996 Mar 27 14  04 50 39.59 +82 54 27.8  .127  34.032   .993  84.3  88.4  66  66.5   .5
1996 Mar 27 16  04 36 42.95 +82 02 01.4  .128  34.811   .992  83.4  89.2  66  63.0   .5
1996 Mar 27 18  04 25 48.24 +81 09 35.1  .130  35.560   .990  82.6  89.9  66  60.3   .5
1996 Mar 27 20  04 17 04.12 +80 17 34.2  .132  36.279   .988  81.8  90.6  66  58.2   .5
1996 Mar 27 22  04 09 56.20 +79 26 14.8  .134  36.970   .986  81.1  91.2  66  56.4   .6
1996 Mar 28 00  04 04 00.85 +78 35 46.8  .135  37.634   .985  80.3  91.9  66  55.0   .6
1996 Mar 28 02  03 59 01.42 +77 46 16.4  .137  38.272   .983  79.6  92.5  66  53.8   .6
1996 Mar 28 04  03 54 45.89 +76 57 47.6  .139  38.884   .981  78.9  93.1  66  52.8   .6
1996 Mar 28 06  03 51 05.40 +76 10 22.7  .141  39.472   .979  78.2  93.7  66  51.9   .7
1996 Mar 28 08  03 47 53.28 +75 24 02.7  .143  40.036   .977  77.5  94.3  66  51.2   .7
1996 Mar 28 10  03 45 04.44 +74 38 48.1  .145  40.578   .976  76.8  94.9  66  50.6   .7
1996 Mar 28 12  03 42 34.93 +73 54 38.7  .147  41.098   .974  76.2  95.4  66  50.0   .7
1996 Mar 28 14  03 40 21.63 +73 11 33.9  .149  41.597   .972  75.6  95.9  66  49.5   .7
1996 Mar 28 16  03 38 22.05 +72 29 32.8  .151  42.076   .970  74.9  96.4  67  49.1   .8
1996 Mar 28 18  03 36 34.18 +71 48 34.5  .153  42.536   .968  74.3  96.9  67  48.7   .8
1996 Mar 28 20  03 34 56.39 +71 08 37.6  .155  42.978   .967  73.7  97.4  67  48.4   .8
1996 Mar 28 22  03 33 27.34 +70 29 40.8  .157  43.402   .965  73.2  97.9  68  48.1   .8
1996 Mar 29 00  03 32 05.89 +69 51 42.8  .159  43.809   .963  72.6  98.3  68  47.8   .8
1996 Mar 29 02  03 30 51.11 +69 14 42.1  .161  44.201   .961  72.1  98.8  69  47.6   .9
1996 Mar 29 04  03 29 42.21 +68 38 37.3  .163  44.577   .959  71.5  99.2  69  47.3   .9
1996 Mar 29 06  03 28 38.53 +68 03 26.7  .165  44.938   .958  71.0  99.6  70  47.2   .9
1996 Mar 29 08  03 27 39.49 +67 29 09.0  .168  45.285   .956  70.5 100.0  70  47.0   .9
1996 Mar 29 10  03 26 44.59 +66 55 42.7  .170  45.619   .954  70.0 100.4  71  46.8   .9
1996 Mar 29 12  03 25 53.41 +66 23 06.3  .172  45.940   .952  69.5 100.7  71  46.7  1.0
1996 Mar 29 14  03 25 05.57 +65 51 18.3  .174  46.248   .950  69.0 101.1  72  46.6  1.0
1996 Mar 29 16  03 24 20.77 +65 20 17.4  .176  46.545   .949  68.6 101.5  73  46.4  1.0
1996 Mar 29 18  03 23 38.71 +64 50 02.0  .179  46.831   .947  68.1 101.8  73  46.3  1.0
1996 Mar 29 20  03 22 59.14 +64 20 31.0  .181  47.106   .945  67.7 102.1  74  46.3  1.0
1996 Mar 29 22  03 22 21.85 +63 51 42.9  .183  47.370   .943  67.2 102.4  75  46.2  1.1
1996 Mar 30 00  03 21 46.63 +63 23 36.4  .186  47.625   .941  66.8 102.7  75  46.1  1.1

1996 Mar 30 12  03 18 50.49 +60 48 23.8  .199  48.970   .930  64.4 104.4  80  45.8  1.2
1996 Mar 31 00  03 16 37.81 +58 33 21.9  .214  50.054   .919  62.3 105.8  85  45.6  1.3
1996 Mar 31 12  03 14 53.66 +56 35 07.3  .228  50.936   .908  60.4 107.0  90  45.5  1.4
1996 Apr  1 00  03 13 29.19 +54 50 53.9  .243  51.660   .897  58.7 107.9  95  45.5  1.5
1996 Apr  1 12  03 12 18.76 +53 18 26.5  .258  52.261   .886  57.1 108.7 101  45.5  1.5
1996 Apr  2 00  03 11 18.66 +51 55 55.2  .273  52.764   .875  55.7 109.4 107  45.5  1.6
1996 Apr  2 12  03 10 26.32 +50 41 49.7  .289  53.189   .864  54.4 109.9 112  45.5  1.7
1996 Apr  3 00  03 09 39.91 +49 34 56.3  .304  53.551   .853  53.1 110.3 118  45.5  1.7
1996 Apr  3 12  03 08 58.08 +48 34 13.7  .320  53.861   .841  51.9 110.7 124  45.4  1.8
1996 Apr  4 00  03 08 19.83 +47 38 51.2  .335  54.131   .830  50.8 110.9 129  45.4  1.8
1996 Apr  4 12  03 07 44.39 +46 48 06.2  .351  54.366   .819  49.8 111.1 135  45.3  1.9
1996 Apr  5 00  03 07 11.16 +46 01 22.8  .367  54.573   .807  48.8 111.3 140  45.2  1.9
1996 Apr  5 12  03 06 39.65 +45 18 10.8  .382  54.757   .796  47.8 111.4 144  45.1  1.9
1996 Apr  6 00  03 06 09.49 +44 38 04.3  .398  54.922   .784  46.9 111.4 148  45.0  1.9
1996 Apr  6 12  03 05 40.35 +44 00 41.1  .414  55.070   .773  46.0 111.4 151  44.9  2.0
1996 Apr  7 00  03 05 11.98 +43 25 42.2  .430  55.205   .761  45.1 111.3 152  44.7  2.0
1996 Apr  7 12  03 04 44.15 +42 52 50.9  .446  55.330   .750  44.3 111.2 151  44.6  2.0
1996 Apr  8 00  03 04 16.68 +42 21 52.9  .462  55.445   .738  43.4 111.1 149  44.4  2.0
1996 Apr  8 12  03 03 49.41 +41 52 35.3  .478  55.552   .726  42.6 110.9 145  44.2  2.0
1996 Apr  9 00  03 03 22.20 +41 24 47.2  .494  55.653   .714  41.8 110.7 141  44.0  2.0
1996 Apr  9 12  03 02 54.92 +40 58 18.6  .510  55.749   .702  41.1 110.4 136  43.7  2.0
1996 Apr 10 00  03 02 27.46 +40 33 00.7  .526  55.841   .690  40.3 110.1 130  43.5  2.0
1996 Apr 10 12  03 01 59.73 +40 08 45.6  .542  55.930   .678  39.6 109.8 124  43.2  2.0
1996 Apr 11 00  03 01 31.63 +39 45 26.2  .558  56.016   .666  38.8 109.5 118  42.9  2.0
1996 Apr 11 12  03 01 03.08 +39 22 55.9  .575  56.100   .654  38.1 109.1 111  42.6  2.0
1996 Apr 12 00  03 00 34.00 +39 01 09.1  .591  56.183   .642  37.4 108.7 105  42.3  1.9
1996 Apr 12 12  03 00 04.32 +38 40 00.2  .607  56.265   .630  36.6 108.3  98  42.0  1.9
1996 Apr 13 00  02 59 33.98 +38 19 24.2  .623  56.346   .618  35.9 107.8  92  41.6  1.9
1996 Apr 13 12  02 59 02.89 +37 59 16.6  .640  56.427   .606  35.2 107.3  85  41.2  1.9
1996 Apr 14 00  02 58 31.01 +37 39 32.9  .656  56.508   .593  34.5 106.7  78  40.8  1.8
1996 Apr 14 12  02 57 58.27 +37 20 09.2  .672  56.588   .581  33.8 106.1  72  40.4  1.8
1996 Apr 15 00  02 57 24.61 +37 01 01.4  .689  56.669   .568  33.1 105.5  65  40.0  1.7
1996 Apr 15 12  02 56 49.96 +36 42 05.9  .705  56.749   .556  32.4 104.9  59  39.5  1.7
1996 Apr 16 00  02 56 14.27 +36 23 19.0  .721  56.830   .543  31.7 104.1  52  39.0  1.6
1996 Apr 16 12  02 55 37.49 +36 04 37.3  .738  56.909   .531  31.0 103.4  46  38.5  1.6
1996 Apr 17 00  02 54 59.54 +35 45 57.2  .754  56.987   .518  30.3 102.6  40  38.0  1.5
1996 Apr 17 12  02 54 20.39 +35 27 15.4  .771  57.064   .506  29.5 101.7  34  37.4  1.5
1996 Apr 18 00  02 53 39.96 +35 08 28.4  .787  57.138   .493  28.8 100.8  29  36.8  1.4
1996 Apr 18 12  02 52 58.19 +34 49 32.7  .804  57.208   .480  28.1  99.8  25  36.2  1.3
1996 Apr 19 00  02 52 15.04 +34 30 24.8  .820  57.272   .468  27.4  98.8  21  35.6  1.3
1996 Apr 19 12  02 51 30.44 +34 11 01.2  .837  57.329   .455  26.7  97.7  20  34.9  1.2
1996 Apr 20 00  02 50 44.34 +33 51 18.1  .853  57.376   .442  25.9  96.5  20  34.2  1.1




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

PsAng            = Position angle of extended radius vector in degrees

TMag             = Approximate Total magnitude
                 =  5.0 + 5.0*log(Delta) + 10.0*log(r)

 
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