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THE UPDATED PATH
(Note: The duration given in the line below is the interval during which the occultation shadow sweeps across the Earth - please see the minute markers on the map to determine the approximate the time for your location)
On 2004 Apr 18 UT, the 81 km diameter asteroid (667) Denise will occult a 9.0 mag star in the constellation Ophiuchus for observers along a path across New Zealand.
In the case of an occultation, the combined light of the asteroid and the star will drop by 6.5 mag to 15.5 mag (the magnitude of the asteroid) for at most 8.4 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, astrometry for the asteroid kindly provided by Stefano Sposetti, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC.
Additional details of this and other events are available at Steve Preston's website at http://www.asteroidoccultation.com/
EVENT DETAILS SUMMARY :Important Note regarding Accuracy:
The uncertainty interval in path widths given above (and shown as a 1-sigma uncertainty ellipse on the plot) refers to RMS deviation and is applied as a +/- range. In other words, a path uncertainty of 1.0 path widths means that the actual center of the asteroid's shadow path should fall within plus or minus 1 path width of the plotted path center. However path errors larger than 1 sigma have been observed so observers should be alert for primary occultations within plus or minus 3 sigma of the updated path.
Further, almost all asteroidal satellites discovered so far have been found within 10 diameters of the asteroid (since this distance is deep enough within the gravitational well to be stable over long timescales). Therefore, if monitoring for secondary events, observing out to about 10 path-widths either side of the predicted track remains worthwhile.
We therefore recommend that you monitor for events if your observing location is up to +/- 10 path-widths from the predicted track. If not monitoring for occultations by secondary bodies you should observe from locations within 3 sigma of the nominal path.
In terms of time, the predictions are now usually accurate to about +/- 0.3 minute so you should be most attentive during the predicted minute of the event. However if intending to catch a potential satellite occultation you should start observing at least 10 times the predicted central duration before the predicted closest approach time for your location, and continue for a similar period afterwards.
Centre Star Star Sun Path Limits Error Limits
E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' "
Longitude Longitude Longitude Longitude
... .. .. -64 0 0 .. .. .. .. .. .. ... .. .. ... .. .. 132 11 27 ... .. ..
131 40 44 -63 0 0 14 34 11 2 74 -38 134 32 31 128 7 50 138 16 41 ... .. ..
137 41 42 -62 0 0 14 34 13 5 69 -39 139 46 25 135 23 48 142 42 4 131 7 11
142 3 31 -61 0 0 14 34 16 7 65 -40 143 45 55 140 14 11 146 14 41 137 5 21
145 33 18 -60 0 0 14 34 19 9 62 -41 147 2 1 144 0 12 149 13 4 141 24 14
148 29 23 -59 0 0 14 34 23 11 60 -42 149 48 35 147 7 7 151 46 50 144 51 34
151 1 18 -58 0 0 14 34 27 12 58 -43 152 13 24 149 46 55 154 1 50 147 45 37
153 14 46 -57 0 0 14 34 32 14 56 -43 154 21 19 152 6 27 156 1 54 150 15 51
155 13 35 -56 0 0 14 34 37 15 54 -44 156 15 36 154 10 7 157 49 45 152 27 55
157 0 23 -55 0 0 14 34 42 17 53 -44 157 58 40 156 0 55 159 27 24 154 25 33
158 37 10 -54 0 0 14 34 47 18 51 -45 159 32 16 157 41 3 160 56 22 156 11 22
160 5 23 -53 0 0 14 34 53 20 50 -45 160 57 45 159 12 10 162 17 51 157 47 17
161 26 14 -52 0 0 14 34 58 21 49 -46 162 16 12 160 35 31 163 32 47 159 14 48
162 40 39 -51 0 0 14 35 4 22 48 -46 163 28 31 161 52 7 164 41 58 160 35 2
163 49 23 -50 0 0 14 35 10 23 48 -47 164 35 23 163 2 48 165 46 3 161 48 56
164 53 5 -49 0 0 14 35 16 25 47 -47 165 37 24 164 8 15 166 45 34 162 57 13
165 52 16 -48 0 0 14 35 23 26 46 -48 166 35 4 165 9 0 167 40 58 164 0 31
166 47 24 -47 0 0 14 35 29 27 46 -48 167 28 50 166 5 33 168 32 40 164 59 23
167 38 51 -46 0 0 14 35 36 28 45 -48 168 19 2 166 58 17 169 20 59 165 54 13
168 26 58 -45 0 0 14 35 43 29 45 -49 169 5 59 167 47 35 170 6 13 166 45 24
169 12 1 -44 0 0 14 35 50 30 44 -49 169 50 0 168 33 43 170 48 37 167 33 17
169 54 16 -43 0 0 14 35 58 31 44 -49 170 31 17 169 16 58 171 28 26 168 18 9
170 33 56 -42 0 0 14 36 5 32 44 -50 171 10 3 169 57 33 172 5 51 169 0 13
171 11 14 -41 0 0 14 36 13 33 44 -50 171 46 31 170 35 42 172 41 3 169 39 44
171 46 19 -40 0 0 14 36 21 34 43 -50 172 20 49 171 11 34 173 14 11 170 16 53
172 19 21 -39 0 0 14 36 29 36 43 -50 172 53 8 171 45 20 173 45 24 170 51 49
172 50 28 -38 0 0 14 36 37 37 43 -51 173 23 34 172 17 9 174 14 49 171 24 43
173 19 48 -37 0 0 14 36 45 38 43 -51 173 52 17 172 47 7 174 42 34 171 55 43
173 47 27 -36 0 0 14 36 53 39 43 -51 174 19 21 173 15 23 175 8 44 172 24 56
174 13 33 -35 0 0 14 37 2 40 43 -51 174 44 53 173 42 2 175 33 26 172 52 29
174 38 9 -34 0 0 14 37 10 41 43 -51 175 8 59 174 7 10 175 56 44 173 18 28
175 1 23 -33 0 0 14 37 19 42 44 -52 175 31 43 174 30 53 176 18 43 173 42 58
175 23 17 -32 0 0 14 37 28 42 44 -52 175 53 10 174 53 15 176 39 28 174 6 4
175 43 57 -31 0 0 14 37 37 43 44 -52 176 13 24 175 14 21 176 59 3 174 27 52
176 3 25 -30 0 0 14 37 46 44 44 -52 176 32 28 175 34 14 177 17 30 174 48 25
176 21 47 -29 0 0 14 37 55 45 45 -52 176 50 27 175 52 59 177 34 54 175 7 46
176 39 5 -28 0 0 14 38 5 46 45 -52 177 7 23 176 10 39 177 51 18 175 26 1
176 55 22 -27 0 0 14 38 14 47 45 -52 177 23 20 176 27 16 178 6 43 175 43 11
177 10 41 -26 0 0 14 38 24 48 46 -52 177 38 20 176 42 54 178 21 14 175 59 20
177 25 4 -25 0 0 14 38 34 49 46 -52 177 52 25 176 57 36 178 34 51 176 14 30
177 38 34 -24 0 0 14 38 43 50 47 -52 178 5 38 177 11 23 178 47 38 176 28 44
177 51 13 -23 0 0 14 38 53 51 47 -52 178 18 1 177 24 18 178 59 37 176 42 5
178 3 3 -22 0 0 14 39 3 51 48 -52 178 29 36 177 36 23 179 10 49 176 54 34
178 14 6 -21 0 0 14 39 14 52 49 -52 178 40 25 177 47 40 179 21 16 177 6 13
178 24 23 -20 0 0 14 39 24 53 49 -52 178 50 29 177 58 11 179 31 0 177 17 5
178 33 57 -19 0 0 14 39 34 54 50 -52 178 59 50 178 7 57 179 40 3 177 27 11
178 42 48 -18 0 0 14 39 44 55 51 -52 179 8 30 178 17 0 179 48 25 177 36 33
178 50 58 -17 0 0 14 39 55 55 52 -52 179 16 30 178 25 21 179 56 8 177 45 11
178 58 29 -16 0 0 14 40 5 56 53 -52 179 23 50 178 33 2 -179 56 47 177 53 8
179 5 21 -15 0 0 14 40 16 57 54 -52 179 30 33 178 40 3 -179 50 19 178 0 24
179 11 36 -14 0 0 14 40 27 58 55 -51 179 36 39 178 46 27 -179 44 26 178 7 2
179 17 14 -13 0 0 14 40 37 58 56 -51 179 42 9 178 52 13 -179 39 8 178 13 1
179 22 17 -12 0 0 14 40 48 59 57 -51 179 47 5 178 57 23 -179 34 24 178 18 23
179 26 45 -11 0 0 14 40 59 59 59 -51 179 51 26 179 1 58 -179 30 13 178 23 8
179 30 39 -10 0 0 14 41 10 60 60 -51 179 55 14 179 5 58 -179 26 34 178 27 18
179 34 0 - 9 0 0 14 41 21 61 61 -50 179 58 29 179 9 25 -179 23 27 178 30 53
179 36 48 - 8 0 0 14 41 32 61 63 -50 -179 58 47 179 12 18 -179 20 52 178 33 55
179 39 4 - 7 0 0 14 41 43 62 64 -50 -179 56 35 179 14 39 -179 18 46 178 36 22
179 40 49 - 6 0 0 14 41 54 62 66 -50 -179 54 54 179 16 27 -179 17 11 178 38 17
179 42 3 - 5 0 0 14 42 5 63 68 -50 -179 53 44 179 17 44 -179 16 5 178 39 39
179 42 46 - 4 0 0 14 42 17 63 69 -49 -179 53 3 179 18 30 -179 15 29 178 40 29
179 42 59 - 3 0 0 14 42 28 63 71 -49 -179 52 52 179 18 45 -179 15 22 178 40 48
179 42 42 - 2 0 0 14 42 39 64 73 -49 -179 53 11 179 18 30 -179 15 43 178 40 35
179 41 55 - 1 0 0 14 42 51 64 75 -48 -179 53 59 179 17 44 -179 16 32 178 39 51
179 40 38 0 0 0 14 43 2 64 77 -48 -179 55 16 179 16 28 -179 17 50 178 38 35
179 38 52 1 0 0 14 43 13 65 79 -48 -179 57 2 179 14 42 -179 19 36 178 36 50
179 36 37 2 0 0 14 43 25 65 81 -48 -179 59 17 179 12 26 -179 21 50 178 34 33
179 33 53 3 0 0 14 43 36 65 83 -47 179 58 0 179 9 41 -179 24 32 178 31 46
179 30 39 4 0 0 14 43 47 65 85 -47 179 54 48 179 6 25 -179 27 41 178 28 28
179 26 56 5 0 0 14 43 59 65 88 -46 179 51 7 179 2 40 -179 31 19 178 24 39
179 22 43 6 0 0 14 44 10 65 90 -46 179 46 57 178 58 25 -179 35 25 178 20 20
179 18 1 7 0 0 14 44 22 65 92 -46 179 42 18 178 53 39 -179 39 59 178 15 29
179 12 49 8 0 0 14 44 33 65 94 -45 179 37 10 178 48 23 -179 45 1 178 10 7
179 7 7 9 0 0 14 44 44 65 96 -45 179 31 32 178 42 37 -179 50 33 178 4 13
179 0 54 10 0 0 14 44 56 65 98 -45 179 25 24 178 36 19 -179 56 33 177 57 48
178 54 10 11 0 0 14 45 7 64 100 -44 179 18 46 178 29 30 179 56 58 177 50 50
178 46 56 12 0 0 14 45 19 64 102 -44 179 11 37 178 22 9 179 49 58 177 43 20
178 39 9 13 0 0 14 45 30 64 104 -43 179 3 57 178 14 16 179 42 29 177 35 16
178 30 50 14 0 0 14 45 41 63 106 -43 178 55 46 178 5 49 179 34 28 177 26 38
178 21 58 15 0 0 14 45 52 63 108 -43 178 47 1 177 56 49 179 25 57 177 17 25
178 12 32 16 0 0 14 46 4 63 109 -42 178 37 44 177 47 15 179 16 53 177 7 37
178 2 32 17 0 0 14 46 15 62 111 -42 178 27 53 177 37 5 179 7 16 176 57 12
177 51 57 18 0 0 14 46 26 62 113 -41 178 17 28 177 26 20 178 57 6 176 46 11
177 40 45 19 0 0 14 46 37 61 114 -41 178 6 27 177 14 57 178 46 21 176 34 31
177 28 55 20 0 0 14 46 48 61 116 -40 177 54 49 177 2 56 178 35 1 176 22 12
177 16 28 21 0 0 14 47 0 60 117 -40 177 42 33 176 50 16 178 23 4 176 9 12
177 3 20 22 0 0 14 47 11 59 118 -39 177 29 39 176 36 55 178 10 30 175 55 30
176 49 31 23 0 0 14 47 21 59 120 -39 177 16 4 176 22 53 177 57 16 175 41 5
176 35 0 24 0 0 14 47 32 58 121 -39 177 1 48 176 8 6 177 43 23 175 25 55
176 19 45 25 0 0 14 47 43 57 122 -38 176 46 48 175 52 35 177 28 47 175 9 59
176 3 43 26 0 0 14 47 54 57 123 -38 176 31 3 175 36 17 177 13 28 174 53 14
175 46 54 27 0 0 14 48 5 56 124 -37 176 14 32 175 19 10 176 57 24 174 35 38
175 29 15 28 0 0 14 48 15 55 125 -37 175 57 11 175 1 11 176 40 32 174 17 10
175 10 44 29 0 0 14 48 26 55 126 -36 175 39 0 174 42 20 176 22 52 173 57 47
174 51 18 30 0 0 14 48 37 54 126 -36 175 19 55 174 22 33 176 4 19 173 37 25
174 30 55 31 0 0 14 48 47 53 127 -35 174 59 55 174 1 47 175 44 53 173 16 3
174 9 32 32 0 0 14 48 57 52 128 -35 174 38 55 173 39 59 175 24 30 172 53 38
173 47 5 33 0 0 14 49 8 51 128 -34 174 16 54 173 17 7 175 3 8 172 30 5
173 23 32 34 0 0 14 49 18 50 129 -34 173 53 47 172 53 7 174 40 42 172 5 21
172 58 48 35 0 0 14 49 28 50 129 -33 173 29 32 172 27 54 174 17 10 171 39 22
172 32 49 36 0 0 14 49 38 49 130 -33 173 4 4 172 1 25 173 52 28 171 12 4
172 5 31 37 0 0 14 49 48 48 130 -32 172 37 18 171 33 34 173 26 32 170 43 21
171 36 49 38 0 0 14 49 58 47 131 -31 172 9 10 171 4 17 172 59 17 170 13 9
171 6 38 39 0 0 14 50 7 46 131 -31 171 39 35 170 33 28 172 30 37 169 41 20
Latitude Latitude Latitude Latitude
170 0 0 41 2 20 14 50 27 44 131 -30 42 1 46 40 1 50 43 32 35 38 25 11
169 0 0 42 42 10 14 50 42 42 131 -29 43 38 34 41 44 53 45 4 53 40 13 34
168 0 0 44 13 37 14 50 56 41 131 -28 45 7 21 43 19 7 46 29 44 41 52 25
167 0 0 45 37 45 14 51 9 39 131 -27 46 29 8 44 45 42 47 48 2 43 23 3
166 0 0 46 55 28 14 51 21 38 131 -27 47 44 45 46 5 35 49 0 31 44 46 30
165 0 0 48 7 28 14 51 31 37 131 -26 48 54 52 47 19 32 50 7 49 46 3 38
164 0 0 49 14 22 14 51 41 36 130 -25 50 0 4 48 28 11 51 10 28 47 15 8
163 0 0 50 16 42 14 51 49 34 130 -25 51 0 51 49 32 6 52 8 56 48 21 38
162 0 0 51 14 54 14 51 57 33 129 -24 51 57 39 50 31 45 53 3 35 49 23 38
161 0 0 52 9 21 14 52 5 32 129 -24 52 50 48 51 27 32 53 54 48 50 21 33
160 0 0 53 0 23 14 52 12 31 128 -23 53 40 39 52 19 47 54 42 51 51 15 46
159 0 0 53 48 18 14 52 18 30 127 -23 54 27 29 53 8 50 55 28 0 52 6 37
158 0 0 54 33 22 14 52 24 29 127 -22 55 11 31 53 54 55 56 10 30 52 54 22
157 0 0 55 15 47 14 52 30 29 126 -22 55 53 0 54 38 18 56 50 33 53 39 18
156 0 0 55 55 46 14 52 35 28 125 -21 56 32 6 55 19 11 57 28 19 54 21 37
155 0 0 56 33 31 14 52 40 27 125 -21 57 9 2 55 57 46 58 4 0 55 1 31
154 0 0 57 9 9 14 52 44 26 124 -20 57 43 54 56 34 11 58 37 43 55 39 11
153 0 0 57 42 51 14 52 48 25 123 -20 58 16 54 57 8 37 59 9 36 56 14 46
152 0 0 58 14 44 14 52 52 25 122 -20 58 48 6 57 41 11 59 39 48 56 48 25
151 0 0 58 44 56 14 52 56 24 122 -19 59 17 40 58 12 0 60 8 24 57 20 16
150 0 0 59 13 31 14 53 0 23 121 -19 59 45 40 58 41 12 60 35 30 57 50 25
149 0 0 59 40 38 14 53 3 23 120 -19 60 12 13 59 8 52 61 1 12 58 18 59
148 0 0 60 6 20 14 53 6 22 119 -18 60 37 24 59 35 6 61 25 34 58 46 3
147 0 0 60 30 42 14 53 9 21 119 -18 61 1 17 59 59 58 61 48 42 59 11 44
146 0 0 60 53 50 14 53 12 21 118 -18 61 23 57 60 23 34 62 10 39 59 36 4
145 0 0 61 15 47 14 53 15 20 117 -17 61 45 27 60 45 58 62 31 29 59 59 10
144 0 0 61 36 36 14 53 17 20 116 -17 62 5 52 61 7 12 62 51 16 60 21 4
143 0 0 61 56 22 14 53 20 19 115 -17 62 25 14 61 27 22 63 10 2 60 41 51
142 0 0 62 15 7 14 53 22 18 114 -17 62 43 37 61 46 29 63 27 51 61 1 34
141 0 0 62 32 54 14 53 24 18 114 -16 63 1 4 62 4 37 63 44 45 61 20 16
140 0 0 62 49 46 14 53 26 17 113 -16 63 17 36 62 21 49 64 0 48 61 37 59
139 0 0 63 5 46 14 53 28 17 112 -16 63 33 17 62 38 8 64 16 0 61 54 48
138 0 0 63 20 55 14 53 30 16 111 -16 63 48 9 62 53 35 64 30 25 62 10 43
137 0 0 63 35 16 14 53 32 16 110 -15 64 2 13 63 8 12 64 44 3 62 25 47
136 0 0 63 48 50 14 53 33 15 109 -15 64 15 32 63 22 3 64 56 58 62 40 2
135 0 0 64 1 40 14 53 35 15 108 -15 64 28 7 63 35 8 65 9 11 62 53 30
134 0 0 64 13 48 14 53 36 14 107 -15 64 40 1 63 47 29 65 20 43 63 6 13
133 0 0 64 25 13 14 53 38 14 107 -15 64 51 13 63 59 8 65 31 36 63 18 13
132 0 0 64 35 59 14 53 39 13 106 -14 65 1 47 64 10 6 65 41 51 63 29 31
131 0 0 64 46 6 14 53 41 13 105 -14 65 11 43 64 20 24 65 51 29 63 40 8
130 0 0 64 55 36 14 53 42 13 104 -14 65 21 2 64 30 5 66 0 31 63 50 5
129 0 0 65 4 29 14 53 43 12 103 -14 65 29 45 64 39 8 66 8 59 63 59 25
128 0 0 65 12 48 14 53 44 12 102 -14 65 37 54 64 47 36 66 16 54 64 8 7
127 0 0 65 20 31 14 53 45 11 101 -13 65 45 29 64 55 28 66 24 16 64 16 13
126 0 0 65 27 42 14 53 46 11 100 -13 65 52 31 65 2 47 66 31 6 64 23 44
125 0 0 65 34 19 14 53 47 10 99 -13 65 59 2 65 9 32 66 37 25 64 30 41
124 0 0 65 40 25 14 53 48 10 99 -13 66 5 1 65 15 44 66 43 13 64 37 4
123 0 0 65 45 59 14 53 49 10 98 -13 66 10 29 65 21 25 66 48 32 64 42 54
122 0 0 65 51 3 14 53 50 9 97 -12 66 15 27 65 26 34 66 53 21 64 48 12
121 0 0 65 55 36 14 53 51 9 96 -12 66 19 55 65 31 12 66 57 42 64 52 59
120 0 0 65 59 40 14 53 52 8 95 -12 66 23 54 65 35 20 67 1 34 64 57 14
119 0 0 66 3 14 14 53 52 8 94 -12 66 27 25 65 38 58 67 4 59 65 0 58
118 0 0 66 6 19 14 53 53 7 93 -12 66 30 27 65 42 7 67 7 56 65 4 12
117 0 0 66 8 56 14 53 54 7 92 -12 66 33 1 65 44 47 67 10 25 65 6 56
116 0 0 66 11 4 14 53 54 7 91 -11 66 35 7 65 46 57 67 12 28 65 9 10
115 0 0 66 12 45 14 53 55 6 90 -11 66 36 45 65 48 39 67 14 4 65 10 54
114 0 0 66 13 57 14 53 55 6 90 -11 66 37 56 65 49 52 67 15 13 65 12 9
113 0 0 66 14 41 14 53 56 5 89 -11 66 38 40 65 50 37 67 15 56 65 12 55
112 0 0 66 14 57 14 53 56 5 88 -11 66 38 56 65 50 54 67 16 12 65 13 12
111 0 0 66 14 46 14 53 57 5 87 -11 66 38 45 65 50 42 67 16 2 65 12 59
110 0 0 66 14 7 14 53 57 4 86 -10 66 38 7 65 50 2 67 15 25 65 12 17
Use these links for further information:
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[Using the Predictions]
[Observing Details]
[Timing Details]
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[Report Form]
[Asteroid Occultation Results]
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