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Orbit and Ephemeris Information for Comet 1995 O1 Hale-Bopp

Don Yeomans - JPL
June 27, 1996

Additional observations through June 23, 1996 have been used to update the orbit, ephemeris, and error analysis.

Object: Comet C/1995 O1 (Hale-Bopp)
JPL Ref. Solution: 35
Planetary Ephemeris: DE403
No. Observations: 1008
Observation Arc: 1995 Jul 24 - 1996 Jun 23

Residual Summary	RA	Dec	Total

Mean .017 -.002 .017

RMS, unweighted .679 .880 .786

Corrected Elements (J2000): Solution 35

Epoch 2450520.50000 = 1997 Mar 13.00000

Post-Fit Std.Dev.

e .995072729 .000004475

q .914084667 .000007855

Tp 2450539.6399555 .0023588 1997 Apr 1.13996

Node 282.4707037 .0000174

w 130.5927430 .0003436

I 89.4299101 .0001570

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.

Epoch (TDB)	e		q		Node		w 	

I Tp

1996 Jul 16.0 .99554324 .914852863 282.473691 130.539365 89.438282 1997 Apr 1.089503

1996 Aug 15.0 .99536868 .914548957 282.473241 130.559195 89.435971 1997 Apr 1.112512

1996 Sep 4.0 .99528829 .914414772 282.472889 130.568183 89.434525 1997 Apr 1.121524

1997 Mar 13.0 .99507273 .914084667 282.470704 130.592743 89.429910 1997 Apr 1.139956

1997 Sep 9.0 .99506420 .914025638 282.469865 130.588890 89.428832 1997 Apr 1.139105

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)

Ephemeris data at 1 day and 5 day steps (O hours UTC)
Ephemeris computed using JPL orbital solution No. 35 dated June 27, 1996
Magnitude predictions are only crude estimates.

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

1996 June - Sep. 	<  2"

1997 Jan. - Feb. < 10"

1997 Mar. < 20"

1997 Apr. < 10"

Ephemeris (with perturbations) for C/1995 O1 (Hale-Bopp)

Date (UT) R.A. J2000 Dec. Delta Deldot r

Theta Beta Moon TMag

1996 Jun 27 19 00 09.76 -12 17 26.9 2.967 -22.63 3.961

166.1 3.5 66 6.8

1996 Jun 28 18 58 49.73 -12 11 31.2 2.954 -22.00 3.951

166.8 3.4 52 6.8

1996 Jun 29 18 57 28.90 -12 05 34.8 2.942 -21.37 3.940

167.4 3.2 37 6.8

1996 Jun 30 18 56 07.33 -11 59 37.8 2.929 -20.74 3.929

168.0 3.1 23 6.8

1996 Jul 1 18 54 45.06 -11 53 40.2 2.918 -20.10 3.919

168.3 3.0 9 6.8

1996 Jul 2 18 53 22.11 -11 47 42.1 2.906 -19.46 3.908

168.6 2.9 11 6.8

1996 Jul 3 18 51 58.53 -11 41 43.6 2.895 -18.82 3.897

168.7 2.9 25 6.7

1996 Jul 4 18 50 34.37 -11 35 44.8 2.884 -18.17 3.887

168.7 2 9 40 6.7

1996 Jul 5 18 49 09.66 -11 29 45.8 2.874 -17.52 3.876

168.5 3.0 55 6.7

1996 Jul 6 18 47 44.46 -11 23 46.7 2.864 -16.88 3.865

168.2 3.1 70 6.7

1996 Jul 7 18 46 18.81 -11 17 47.6 2.855 -16.23 3.854

167.8 3.2 84 6.7

1996 Jul 8 18 44 52.75 -11 11 48.6 2.845 -15.58 3.844

167.2 3.4 97 6.7

1996 Jul 9 18 43 26.34 -11 05 49.7 2.837 -14.93 3.833

166.6 3.5 111 6.6

1996 Jul 10 18 41 59.63 -10 59 51.2 2.828 -14.27 3.822

165.8 3.7 124 6.6

1996 Jul 11 18 40 32.66 -10 53 53.1 2.820 -13.62 3.811

165.0 4.0 136 6.6

1996 Jul 12 18 39 05.50 -10 47 55.6 2.812 -12.98 3.800

164.1 4.2 149 6.6

1996 Jul 13 18 37 38.20 -10 41 58.7 2.805 -12.33 3.790

163.2 4.5 161 6.6

1996 Jul 14 18 36 10.80 -10 36 02.5 2.798 -11.69 3.779

162.2 4.7 171 6.6

1996 Jul 15 18 34 43.37 -10 30 07.3 2.792 -11.05 3.768

161.1 5.0 170 6.6

1996 Jul 16 18 33 15.95 -10 24 13.0 2.785 -10.41 3.757

160.1 5.3 160 6.5

1996 Jul 17 18 31 48.60 -10 18 19.9 2.780 -9.77 3.746

159.0 5.6 148 6.5

1996 Jul 18 18 30 21.38 -10 12 28.0 2.774 -9.15 3.735

157.9 5.9 136 6.5

1996 Jul 19 18 28 54.35 -10 06 37.4 2.769 -8.52 3.724

156.7 6.2 124 6.5

1996 Jul 20 18 27 27.54 -10 00 48.3 2.764 -7.91 3.714

155.6 6.5 112 6.5

1996 Jul 21 18 26 01.02 -09 55 00.8 2.760 -7.30 3.703

154.4 6.8 100 6.5

1996 Jul 22 18 24 34.85 -09 49 15.0 2.756 -6.69 3.692

153.3 7.1 87 6.5

1996 Jul 23 18 23 09.06 -09 43 31.0 2.752 -6.09 3.681

152.1 7.4 74 6.4

1996 Jul 24 18 21 43.71 -09 37 48.9 2.749 -5.51 3.670

150.9 7.7 61 6.4

1996 Jul 25 18 20 18.86 -09 32 08.8 2.746 -4.92 3.659

149.7 8.0 48 6.4

1996 Jul 26 18 18 54.55 -09 26 30.9 2.743 -4.35 3.648

148.5 8.4 34 6.4

1996 Jul 27 18 17 30.83 -09 20 55.2 2.741 -3.79 3.637

147.3 8.7 21 6.4

1996 Jul 28 18 16 07.74 -09 15 21.8 2.739 -3.23 3.626

146.1 9.0 10 6.4

1996 Jul 29 18 14 45.32 -09 09 50.9 2.737 -2.69 3.615

144.9 9.3 15 6.4

1996 Jul 30 18 13 23.63 -09 04 22.5 2.736 -2.15 3.604

143.7 9.6 29 6.4

1996 Jul 31 18 12 02.71 -08 58 56.8 2.735 -1.62 3.593

142.5 9.9 44 6.4

1996 Aug 1 18 10 42.58 -08 53 33.8 2.734 -1.10 3.582

141.2 10.2 59 6.3

1996 Aug 2 18 09 23.31 -08 48 13.6 2.733 -.60 3.571

140.0 10.5 74 6.3

1996 Aug 3 18 08 04.92 -08 42 56.3 2.733 -.10 3.560

138.8 10.8 88 6.3

1996 Aug 4 18 06 47.45 -08 37 42.0 2.733 .39 3.549

137.6 11.1 103 6.3

1996 Aug 5 18 05 30.96 -08 32 30.8 2.734 .87 3.538

136.4 11.4 116 6.3

1996 Aug 6 18 04 15.46 -08 27 22.8 2.734 1.34 3.527

135.2 11.7 129 6.3

1996 Aug 7 18 03 01.01 -08 22 17.9 2.735 1.80 3.516

134.0 12.0 142 6.3

1996 Aug 8 18 01 47.63 -08 17 16.3 2.736 2.24 3.504

132.7 12.3 154 6.3

1996 Aug 9 18 00 35.36 -08 12 18.1 2.738 2.68 3.493

131.5 12.5 165 6.3

1996 Aug 10 17 59 24.24 -08 07 23.2 2.739 3.10 3.482

130.3 12.8 170 6.3

1996 Aug 11 17 58 14.30 -08 02 31.7 2.741 3.51 3.471

129.1 13.1 164 6.2

1996 Aug 12 17 57 05.56 -07 57 43.7 2.743 3.91 3.460

127.9 13.4 153 6.2

1996 Aug 13 17 55 58.06 -07 52 59.1 2.746 4.29 3.449

126.7 13.6 142 6.2

1996 Aug 14 17 54 51.82 -07 48 18.1 2.748 4.66 3.438

125.6 13.9 130 6.2

1996 Aug 15 17 53 46.87 -07 43 40.5 2.751 5.02 3.426

124.4 14.1 118 6.2

1996 Aug 16 17 52 43.23 -07 39 06.5 2.754 5.37 3.415

123.2 14.4 106 6.2

1996 Aug 17 17 51 40.92 -07 34 36.1 2.757 5.70 3.404

122.0 14.6 94 6.2

1996 Aug 18 17 50 39.97 -07 30 09.1 2.761 6.02 3.393

120.8 14.8 82 6.2

1996 Aug 19 17 49 40.38 -07 25 45.7 2.764 6.32 3.382

119.7 15.1 69 6.2

1996 Aug 20 17 48 42.19 -07 21 25.8 2.768 6.61 3.370

118.5 15.3 57 6.2

1996 Aug 21 17 47 45.39 -07 17 09.4 2.772 6.89 3.359

117.3 15.5 44 6.2

1996 Aug 22 17 46 50.02 -07 12 56.4 2.776 7.15 3.348

116.2 15.7 31 6.2

1996 Aug 23 17 45 56.06 -07 08 46.9 2.780 7.40 3.337

115.0 15.9 19 6.1

1996 Aug 24 17 45 03.55 -07 04 40.8 2.785 7.64 3.325

113.9 16.1 11 6.1

1996 Aug 25 17 44 12.48 -07 00 38.1 2.789 7.86 3.314

112.8 16.3 17 6.1

1996 Aug 26 17 43 22.85 -06 56 38.7 2.794 8.07 3.303

111.6 16.5 30 6.1

1996 Aug 27 17 42 34.69 -06 52 42.7 2.798 8.27 3.291

110.5 16.7 45 6.1

1996 Aug 28 17 41 47.98 -06 48 49.8 2.803 8.45 3.280

109.4 16.9 59 6.1

1996 Aug 29 17 41 02.74 -06 45 00.2 2.808 8.63 3.269

108.3 17.1 74 6.1

1996 Aug 30 17 40 18.97 -06 41 13.7 2.813 8.79 3.257

107.2 17.2 89 6.1

1996 Aug 31 17 39 36.67 -06 37 30.3 2.818 8.94 3.246

106.1 17.4 104 6.1

1996 Sep 1 17 38 55.84 -06 33 50.0 2.823 9.07 3.234

105.0 17.5 118 6.1

1996 Sep 2 17 38 16.49 -06 30 12.7 2.829 9.20 3.223

103.9 17.7 131 6.1

1996 Sep 3 17 37 38.61 -06 26 38.2 2.834 9.31 3.212

102.8 17.8 144 6.1

1996 Sep 4 17 37 02.22 -06 23 06.6 2.839 9.41 3.200

101.7 18.0 155 6.1

1996 Sep 5 17 36 27.30 -06 19 37.8 2.845 9.50 3.189

100.6 18.1 165 6.0

1996 Sep 6 17 35 53.86 -06 16 11.7 2.850 9.58 3.177

99.6 18.2 168 6.0

1996 Sep 7 17 35 21.91 -06 12 48.2 2.856 9.64 3.166

98.5 18.3 161 6.0

1996 Sep 8 17 34 51.42 -06 09 27.2 2.862 9.70 3.154

97.4 18.5 150 6.0

1996 Sep 9 17 34 22.41 -06 06 08.6 2.867 9.74 3.143

96.4 18.6 139 6.0

1996 Sep 10 17 33 54.87 -06 02 52.4 2.873 9.76 3.131

95.3 18.7 128 6.0

1996 Sep 11 17 33 28.79 -05 59 38.4 2.878 9.78 3.120

94.3 18.8 116 6.0

1996 Sep 12 17 33 04.18 -05 56 26.6 2.884 9.79 3.108

93.3 18.9 104 6.0

1996 Sep 13 17 32 41.01 -05 53 16.8 2.890 9.78 3.097

92.2 18.9 92 6.0

1996 Sep 14 17 32 19.29 -05 50 08.9 2.895 9.76 3.085

91.2 19.0 80 6.0

1996 Sep 15 17 31 59.01 -05 47 02.9 2.901 9.73 3.074

90.2 19.1 68 6.0

1996 Sep 16 17 31 40.16 -05 43 58.5 2.907 9.69 3.062

89.2 19.2 56 6.0

1996 Sep 17 17 31 22.73 -05 40 55.8 2.912 9.63 3.051

88.2 19.2 43 6.0

1996 Sep 18 17 31 06.71 -05 37 54.5 2.918 9.57 3.039

87.2 19.3 31 5.9

1996 Sep 19 17 30 52.09 -05 34 54.7 2.923 9.49 3.027

86.2 19.3 20 5.9

1996 Sep 20 17 30 38.86 -05 31 56.0 2.929 9.41 3.016

85.2 19.4 13 5.9

1996 Sep 22 17 30 16.51 -05 26 02.1 2.939 9.21 2.992

83.3 19.5 29 5.9

1996 Sep 27 17 29 44.11 -05 11 31.5 2.965 8.55 2.934

78.5 19.6 100 5.9

1996 Oct 2 17 29 44.05 -04 57 09.7 2.989 7.68 2.875

73.8 19.5 162 5.8

1996 Oct 7 17 30 15.07 -04 42 42.1 3.009 6.60 2.816

69.3 19.4 130 5.8

1996 Oct 12 17 31 15.85 -04 27 52.9 3.027 5.34 2.757

65.0 19.1 71 5.7

1996 Oct 17 17 32 45.03 -04 12 25.7 3.040 3.89 2.697

60.7 18.8 15 5.6

1996 Oct 22 17 34 41.09 -03 56 03.5 3.049 2.29 2.637

56.7 18.4 66 5.6

1996 Oct 27 17 37 02.60 -03 38 30.0 3.053 .58 2.576

52.8 17.9 133 5.5

1996 Nov 1 17 39 48.40 -03 19 28.8 3.052 -1.24 2.516

49.0 17.3 156 5.4

1996 Nov 6 17 42 57.62 -02 58 42.3 3.046 -3.16 2.455

45.5 16.7 102 5.3

1996 Nov 11 17 46 29.42 -02 35 51.5 3.034 -5.17 2.393

42.1 16.1 42 5.3

1996 Nov 16 17 50 22.96 -02 10 36.5 3.016 -7.25 2.331

39.0 15.5 33 5.2

1996 Nov 21 17 54 37.43 -01 42 36.3 2.992 -9.38 2.269

36.1 14.9 98 5.0

1996 Nov 26 17 59 12.27 -01 11 29.8 2.962 -11.53 2.207

33.5 14.3 157 4.9

1996 Dec 1 18 04 07.34 -00 36 53.7 2.925 -13.70 2.145

31.3 13.8 133 4.8

1996 Dec 6 18 09 22.73 +00 01 38.0 2.883 -15.87 2.082

29.5 13.5 78 4.7

1996 Dec 11 18 14 58.70 +00 44 34.5 2.834 -18.04 2.019

28.1 13.3 22 4.6

1996 Dec 16 18 20 55.58 +01 32 28.1 2.778 -20.19 1.956

27.2 13.3 62 4.4

1996 Dec 21 18 27 14.02 +02 25 53.6 2.717 -22.27 1.892

26.9 13.6 124 4.2

1996 Dec 26 18 33 55.28 +03 25 29.5 2.650 -24.27 1.829

27.0 14.1 157 4.1

1996 Dec 31 18 41 01.28 +04 32 00.1 2.577 -26.18 1.766

27.6 15.0 112 3.9

1997 Jan 5 18 48 34.58 +05 46 16.6 2.499 -27.98 1.702

28.6 16.1 58 3.7

1997 Jan 10 18 56 38.45 +07 09 17.7 2.416 -29.64 1.639

30.0 17.5 29 3.5

1997 Jan 15 19 05 16.98 +08 42 09.1 2.328 -31.12 1.577

31.6 19.1 87 3.3

1997 Jan 20 19 14 35.74 +10 26 02.7 2.236 -32.37 1.514

33.4 20.9 139 3.1

1997 Jan 25 19 24 42.41 +12 22 18.6 2.141 -33.34 1.453

35.2 23.0 142 2.9

1997 Jan 30 19 35 47.27 +14 32 24.7 2.044 -33.98 1.392

37.1 25.3 97 2.6

1997 Feb 4 19 48 03.84 +16 57 52.6 1.945 -34.23 1.332

39.0 27.8 47 2.4

1997 Feb 9 20 01 49.98 +19 40 08.0 1.847 -33.98 1.274

40.8 30.4 47 2.1

1997 Feb 14 20 17 29.37 +22 40 10.6 1.749 -33.12 1.218

42.4 33.1 98 1.9

1997 Feb 19 20 35 33.88 +25 58 02.4 1.656 -31.53 1.165

43.8 36.0 135 1.6

1997 Feb 24 20 56 45.74 +29 31 58.1 1.568 -29.06 1.114

44.9 38.9 131 1.3

1997 Mar 1 21 21 58.34 +33 17 05.9 1.489 -25.61 1.067

45.7 41.7 96 1.1

1997 Mar 6 21 52 13.30 +37 03 41.0 1.421 -21.10 1.025

46.2 44.3 57 .8

1997 Mar 11 22 28 27.54 +40 35 25.0 1.368 -15.54 .989

46.2 46.5 50 .6

1997 Mar 16 23 11 02.47 +43 29 22.7 1.332 -9.11 .959

45.9 48.1 83 .5

1997 Mar 21 23 58 57.24 +45 20 10.4 1.316 -2.14 .936

45.2 49.0 117 .4

1997 Mar 26 00 49 19.83 +45 49 07.2 1.320 4.89 .921

44.1 49.0 140 .3

1997 Mar 31 01 38 11.84 +44 53 32.0 1.344 11.46 .914

42.9 48.0 120 .4

1997 Apr 5 02 22 14.10 +42 47 48.6 1.385 17.16 .917

41.4 46.2 69 .4

1997 Apr 10 02 59 55.59 +39 55 11.8 1.442 21.75 .928

39.7 43.6 26 .6

1997 Apr 15 03 31 21.01 +36 38 08.9 1.510 25.18 .947

37.9 40.6 62 .7

1997 Apr 20 03 57 23.53 +33 13 23.1 1.586 27.54 .974

36.1 37.4 113 .9

1997 Apr 25 04 19 07.70 +29 51 23.8 1.668 28.98 1.008

34.1 34.0 165 1.1

1997 Apr 30 04 37 31.92 +26 37 50.0 1.753 29.66 1.047

32.1 30.8 123 1.4

1997 May 5 04 53 23.29 +23 35 08.9 1.839 29.74 1.092

30.2 27.7 55 1.6

1997 May 10 05 07 17.63 +20 43 52.6 1.924 29.37 1.141

28.3 24.8 12 1.9

1997 May 15 05 19 41.55 +18 03 30.0 2.008 28.66 1.193

26.6 22.3 70 2.1

1997 May 20 05 30 54.95 +15 32 59.8 2.090 27.72 1.248

25.0 20.0 128 2.3

1997 May 25 05 41 12.81 +13 11 09.9 2.168 26.62 1.305

23.7 18.1 167 2.5

1997 May 30 05 50 46.48 +10 56 46.1 2.243 25.40 1.364

22.6 16.6 100 2.8

1997 Jun 4 05 59 44.50 +08 48 37.1 2.315 24.09 1.424

21.9 15.4 34 3.0

1997 Jun 9 06 08 13.04 +06 45 36.2 2.382 22.73 1.486

21.6 14.5 32 3.2

1997 Jun 14 06 16 16.66 +04 46 44.1 2.446 21.36 1.548

21.6 14.0 88 3.4

1997 Jun 19 06 23 58.89 +02 51 08.5 2.506 19.99 1.610

22.1 13.7 145 3.5

1997 Jun 24 06 31 22.55 +00 58 03.4 2.561 18.66 1.673

23.0 13.7 139 3.7

1997 Jun 29 06 38 29.92 -00 53 12.2 2.613 17.33 1.736

24.2 13.9 74 3.9

1997 Jul 4 06 45 22.58 -02 43 15.3 2.662 16.04 1.800

25.7 14.2 23 4.0

1997 Jul 9 06 52 01.47 -04 32 38.1 2.706 14.79 1.863

27.4 14.5 54 4.2

1997 Jul 14 06 58 27.19 -06 21 47.8 2.747 13.61 1.927

29.4 15.0 107 4.3

1997 Jul 19 07 04 40.20 -08 11 07.1 2.785 12.49 1.990

31.5 15.5 153 4.5

1997 Jul 24 07 10 40.89 -10 00 55.9 2.819 11.45 2.053

33.7 15.9 112 4.6

1997 Jul 29 07 16 29.49 -11 51 32.6 2.851 10.47 2.116

36.0 16.4 54 4.7

1997 Aug 3 07 22 05.78 -13 43 13.4 2.880 9.56 2.178

38.4 16.8 34 4.8

1997 Aug 8 07 27 29.29 -15 36 10.7 2.906 8.73 2.241

40.9 17.2 75 4.9

1997 Aug 13 07 32 39.40 -17 30 32.8 2.930 8.01 2.303

43.5 17.6 123 5.1

1997 Aug 18 07 37 35.51 -19 26 25.6 2.952 7.38 2.365

46.0 17.9 139 5.2

1997 Aug 23 07 42 17.02 -21 23 53.1 2.973 6.84 2.426

48.6 18.2 87 5.3

1997 Aug 28 07 46 43.03 -23 22 59.1 2.992 6.39 2.487

51.2 18.5 45 5.3

1997 Sep 2 07 50 52.25 -25 23 43.6 3.010 6.03 2.548

53.8 18.6 53 5.4

1997 Sep 7 07 54 43.15 -27 26 02.6 3.027 5.78 2.609

56.4 18.8 93 5.5

1997 Sep 12 07 58 14.09 -29 29 47.8 3.043 5.65 2.669

59.0 18.9 130 5.6

1997 Sep 17 08 01 23.37 -31 34 48.1 3.060 5.62 2.729

61.6 18.9 116 5.7

1997 Sep 22 08 04 09.12 -33 40 51.2 3.076 5.68 2.789

64.1 18.9 71 5.8

1997 Sep 27 08 06 28.96 -35 47 42.8 3.093 5.84 2.848

66.6 18.9 51 5.9

1997 Oct 2 08 08 19.99 -37 55 02.9 3.110 6.09 2.907

69.1 18.8 72 5.9

1997 Oct 7 08 09 39.04 -40 02 25.7 3.128 6.45 2.965

71.5 18.6 106 6.0

1997 Oct 12 08 10 22.70 -42 09 20.9 3.147 6.91 3.024

73.7 18.5 123 6.1

1997 Oct 17 08 10 27.37 -44 15 15.3 3.168 7.45 3.082

76.0 18.3 96 6.2

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

Tmag = Total magnitude

= .0 + 5.00*log(Delta) + 7.50*log(r)