|
|
Updated: 2008 JAN 02, 23:00 UT
Event Rank : 6
(The event Rank is a measure of the likelihood of observing an event, and is equal to the probability of at least one successful observation by a team of two observers spaced 1/8 path width just inside opposite sides of the predicted path. An event rank of 100 indicates that the prediction is expected to be very accurate).
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 time for your location.
On 2008 Jan 04 UT, the 17 km diameter asteroid (1252) Celestia will occult a 9.8 mag star in the constellation Hydra for observers along a narrow, large uncertainty path across Queensland, north-eastern New South Wales and the south-western end of the south island of New Zealand.
In the case of an occultation, the combined light of the asteroid and the star will drop by 4.9 mag to 14.7 mag (the magnitude of the asteroid) for at most 1.5 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC, Hipparcos .
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 Limit1 Path Limit2 Error Limit1 Error Limit2
E. Longitude Latitude U.T. Alt Az Alt
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' "
Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude
167 2 22 -48 19 0 12 43 59 37 38 -19 166 53 45 -48 23 41 167 10 56 -48 14 20 163 29 16 -50 9 21 170 10 26 -46 31 59
166 28 27 -47 19 45 12 44 8 37 39 -20 166 20 1 -47 24 21 166 36 51 -47 15 10 163 0 4 -49 8 0 169 33 10 -45 34 36
165 54 19 -46 21 31 12 44 17 38 40 -21 165 46 2 -46 26 2 166 2 34 -46 17 0 162 30 12 -48 7 48 168 55 56 -44 38 6
165 19 57 -45 24 14 12 44 26 38 41 -22 165 11 49 -45 28 40 165 28 3 -45 19 47 161 59 45 -47 8 41 168 18 44 -43 42 26
164 45 22 -44 27 50 12 44 35 39 43 -23 164 37 21 -44 32 12 164 53 20 -44 23 28 161 28 44 -46 10 35 167 41 31 -42 47 34
164 10 32 -43 32 16 12 44 44 39 44 -24 164 2 39 -43 36 34 164 18 23 -43 27 57 160 57 11 -45 13 24 167 4 16 -41 53 27
163 35 28 -42 37 28 12 44 54 39 45 -25 163 27 41 -42 41 43 163 43 13 -42 33 14 160 25 8 -44 17 7 166 26 57 -41 0 1
163 0 9 -41 43 25 12 45 3 40 46 -25 162 52 29 -41 47 36 163 7 48 -41 39 14 159 52 35 -43 21 38 165 49 34 -40 7 15
162 24 35 -40 50 3 12 45 12 40 47 -26 162 17 0 -40 54 11 162 32 8 -40 45 56 159 19 33 -42 26 56 165 12 5 -39 15 6
161 48 45 -39 57 21 12 45 21 40 48 -27 161 41 16 -40 1 25 161 56 13 -39 53 16 158 46 3 -41 32 57 164 34 29 -38 23 32
161 12 38 -39 5 15 12 45 30 40 49 -28 161 5 13 -39 9 17 161 20 1 -39 1 13 158 12 4 -40 39 39 163 56 44 -37 32 32
160 36 14 -38 13 44 12 45 40 41 50 -29 160 28 53 -38 17 43 160 43 32 -38 9 45 157 37 38 -39 47 0 163 18 49 -36 42 4
159 59 31 -37 22 46 12 45 49 41 52 -29 159 52 15 -37 26 43 160 6 45 -37 18 50 157 2 42 -38 54 58 162 40 43 -35 52 5
159 22 29 -36 32 20 12 45 58 41 53 -30 159 15 16 -36 36 14 159 29 39 -36 28 26 156 27 19 -38 3 30 162 2 25 -35 2 35
158 45 6 -35 42 23 12 46 7 41 54 -31 158 37 57 -35 46 15 158 52 13 -35 38 32 155 51 26 -37 12 35 161 23 53 -34 13 32
158 7 22 -34 52 55 12 46 16 41 55 -31 158 0 16 -34 56 44 158 14 26 -34 49 6 155 15 3 -36 22 10 160 45 5 -33 24 54
157 29 15 -34 3 53 12 46 25 41 56 -32 157 22 12 -34 7 40 157 36 17 -34 0 6 154 38 9 -35 32 15 160 6 1 -32 36 41
156 50 45 -33 15 16 12 46 35 41 57 -33 156 43 44 -33 19 1 156 57 44 -33 11 32 154 0 44 -34 42 48 159 26 39 -31 48 51
156 11 49 -32 27 4 12 46 44 41 59 -33 156 4 51 -32 30 47 156 18 46 -32 23 21 153 22 46 -33 53 47 158 46 58 -31 1 23
155 32 27 -31 39 14 12 46 53 41 60 -34 155 25 31 -31 42 55 155 39 22 -31 35 34 152 44 15 -33 5 11 158 6 56 -30 14 16
154 52 37 -30 51 47 12 47 2 41 61 -35 154 45 43 -30 55 26 154 59 31 -30 48 8 152 5 9 -32 16 59 157 26 31 -29 27 29
154 12 18 -30 4 40 12 47 11 41 62 -35 154 5 25 -30 8 17 154 19 10 -30 1 2 151 25 26 -31 29 10 156 45 42 -28 41 1
153 31 27 -29 17 52 12 47 21 41 63 -36 153 24 35 -29 21 28 153 38 18 -29 14 17 150 45 5 -30 41 42 156 4 27 -27 54 51
152 50 4 -28 31 23 12 47 30 41 64 -36 152 43 13 -28 34 57 152 56 54 -28 27 49 150 4 4 -29 54 34 155 22 45 -27 8 58
152 8 6 -27 45 12 12 47 39 41 66 -37 152 1 15 -27 48 45 152 14 55 -27 41 40 149 22 22 -29 7 46 154 40 33 -26 23 21
151 25 31 -26 59 18 12 47 48 40 67 -37 151 18 40 -27 2 49 151 32 19 -26 55 47 148 39 56 -28 21 16 153 57 50 -25 38 0
150 42 16 -26 13 40 12 47 57 40 68 -38 150 35 26 -26 17 9 150 49 5 -26 10 10 147 56 43 -27 35 3 153 14 34 -24 52 54
149 58 21 -25 28 17 12 48 7 40 69 -38 149 51 31 -25 31 45 150 5 10 -25 24 49 147 12 42 -26 49 7 152 30 42 -24 8 1
149 13 42 -24 43 8 12 48 16 39 70 -39 149 6 51 -24 46 35 149 20 31 -24 39 41 146 27 49 -26 3 27 151 46 12 -23 23 21
148 28 16 -23 58 13 12 48 25 39 71 -39 148 21 25 -24 1 39 148 35 6 -23 54 47 145 42 2 -25 18 1 151 1 1 -22 38 54
147 42 1 -23 13 31 12 48 34 39 72 -40 147 35 8 -23 16 55 147 48 52 -23 10 6 144 55 17 -24 32 49 150 15 8 -21 54 39
146 54 53 -22 29 1 12 48 43 38 73 -40 146 47 59 -22 32 24 147 1 46 -22 25 37 144 7 31 -23 47 51 149 28 28 -21 10 35
146 6 49 -21 44 42 12 48 52 38 74 -40 145 59 53 -21 48 4 146 13 44 -21 41 20 143 18 39 -23 3 4 148 41 0 -20 26 41
145 17 45 -21 0 34 12 49 2 37 75 -41 145 10 47 -21 3 55 145 24 42 -20 57 13 142 28 37 -22 18 30 147 52 39 -19 42 57
144 27 37 -20 16 36 12 49 11 37 76 -41 144 20 36 -20 19 56 144 34 36 -20 13 16 141 37 19 -21 34 6 147 3 22 -18 59 23
143 36 20 -19 32 47 12 49 20 36 77 -41 143 29 16 -19 36 6 143 43 22 -19 29 28 140 44 41 -20 49 53 146 13 5 -18 15 57
142 43 48 -18 49 7 12 49 29 36 78 -41 142 36 41 -18 52 25 142 50 54 -18 45 50 139 50 35 -20 5 49 145 21 44 -17 32 38
141 49 57 -18 5 36 12 49 38 35 79 -41 141 42 46 -18 8 53 141 57 7 -18 2 19 138 54 55 -19 21 53 144 29 13 -16 49 28
140 54 40 -17 22 11 12 49 48 34 79 -42 140 47 24 -17 25 27 141 1 54 -17 18 55 137 57 31 -18 38 6 143 35 28 -16 6 24
139 57 48 -16 38 54 12 49 57 33 80 -42 139 50 27 -16 42 9 140 5 7 -16 35 38 136 58 16 -17 54 26 142 40 22 -15 23 26
138 59 15 -15 55 42 12 50 6 33 81 -42 138 51 48 -15 58 56 139 6 40 -15 52 28 135 56 56 -17 10 52 141 43 49 -14 40 34
137 58 50 -15 12 36 12 50 15 32 82 -42 137 51 16 -15 15 49 138 6 22 -15 9 22 134 53 20 -16 27 24 140 45 41 -13 57 46
136 56 22 -14 29 34 12 50 24 31 83 -42 136 48 40 -14 32 47 137 4 1 -14 26 22 133 47 12 -15 44 1 139 45 49 -13 15 3
135 51 38 -13 46 36 12 50 33 30 83 -41 135 43 47 -13 49 48 135 59 27 -13 43 25 132 38 13 -15 0 42 138 44 4 -12 32 24
134 44 24 -13 3 42 12 50 43 29 84 -41 134 36 22 -13 6 53 134 52 23 -13 0 31 131 26 2 -14 17 26 137 40 15 -11 49 47
133 34 20 -12 20 50 12 50 52 28 85 -41 133 26 6 -12 24 0 133 42 31 -12 17 40 130 10 10 -13 34 11 136 34 8 -11 7 13
132 21 5 -11 37 59 12 51 1 27 86 -41 132 12 37 -11 41 8 132 29 31 -11 34 50 128 50 3 -12 50 58 135 25 27 -10 24 40
131 4 13 -10 55 8 12 51 10 26 86 -40 130 55 28 -10 58 16 131 12 54 -10 52 0 127 24 55 -12 7 43 134 13 54 - 9 42 8
129 43 7 -10 12 17 12 51 19 25 87 -40 129 34 2 -10 15 24 129 52 9 -10 9 9 125 53 46 -11 24 26 132 59 7 - 8 59 36
128 17 6 - 9 29 23 12 51 29 23 87 -39 128 7 36 - 9 32 29 128 26 32 - 9 26 16 124 15 11 -10 41 3 131 40 37 - 8 17 2
Use these links for further information:
[Planetary Occultations]
[Using the Predictions]
[Observing Details]
[Timing Details]
[Reporting Details]
[Report Form]
[Asteroid Occultation Results]
[Top of Page][Return to Home Page]