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发表于 2006-7-27 22:31
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来自： 中国–广西–桂林 电信
详细预报：
来自：http://www.asteroidoccultation.com/2006_08/0803_209_5366_Summary.txt
IOTA/IOTA-ES occultation update for
(209) Dido / UCAC2 17787550 event on 2006 Aug 03, 14:45 UT
Visible from China, Hong Kong, Philippines
Summary
-------
On 2006 Aug 03 UT, the 160 km diameter asteroid (209) Dido will occult a 11.8
mag star in the constellation Scorpius for observers along a path across China,
Hong Kong, Philippines.
In the case of an occultation, the combined light of the asteroid and the star
will drop by 1.6 mag to 13.1 mag (the magnitude of the asteroid) for at most
36.0 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly
provided by Ron Stone, historical astrometry from the MPC files (via AstDys),
and the following catalogs for the star position: UCAC.
The event at a glimpse
----------------------
* Rank: 95
* date and approx. time of event: 2006 Aug 03, 14:33 - 2006 Aug 03, 15:01 UT
* magnitude of target star: 11.8
* magnitude drop [mag]: 1.6
* estimated maximum duration : 36.0
* Moon: 63 % sunlit, 30?distance
* Sun: 134?distance
* rough path description: China, Hong Kong, Philippines
The occultation path
--------------------
* approximate projected width [km]: 275
* 1 sigma uncertainty interval [path widths]: +/- 0.43
* 1 sigma uncertainty interval [seconds]: +/- 14.4
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .046 +/- .042)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .046", .042", 91?)
* approx speed of asteroid's shadow [km/s]: 4.4386
* website for maps:
http://lunar-occultations.com/iota/asteroids/astrndx.htm
http://www.asteroidoccultation.com
Path Coordinates:
Occultation of UCAC2 17787550 by 209 Dido on 2006 Aug 03
Centre Star Star Sun   ath 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
109 42 14 55 0 0 15 1 27 0 198 -14 ... .. .. ... .. .. ... .. .. ... .. ..
109 9 43 54 0 0 15 1 26 1 198 -15 111 30 57 ... .. .. 113 37 57 ... .. ..
108 41 47 53 0 0 15 1 25 2 198 -16 110 58 29 ... .. .. 113 1 8 ... .. ..
108 18 0 52 0 0 15 1 23 3 197 -17 110 30 38 ... .. .. 112 29 24 ... .. ..
107 58 1 51 0 0 15 1 20 4 197 -17 110 7 0 105 53 46 112 2 16 ... .. ..
107 41 33 50 0 0 15 1 17 5 197 -18 109 47 12 105 40 20 111 39 20 ... .. ..
107 28 19 49 0 0 15 1 13 6 197 -19 109 30 57 105 29 53 111 20 14 ... .. ..
107 18 6 48 0 0 15 1 8 7 197 -20 109 17 59 105 22 12 111 4 42 ... .. ..
107 10 42 47 0 0 15 1 2 8 196 -21 109 8 4 105 17 7 110 52 28 103 42 9
107 5 56 46 0 0 15 0 56 9 196 -21 109 1 2 105 14 29 110 43 18 103 41 14
107 3 40 45 0 0 15 0 48 10 196 -22 108 56 41 105 14 10 110 37 1 103 42 30
107 3 46 44 0 0 15 0 41 11 196 -23 108 54 52 105 16 3 110 33 28 103 45 50
107 6 7 43 0 0 15 0 32 12 196 -24 108 55 29 105 20 2 110 32 29 103 51 9
107 10 37 42 0 0 15 0 23 13 197 -25 108 58 23 105 26 1 110 33 56 103 58 21
107 17 10 41 0 0 15 0 13 14 197 -26 109 3 30 105 33 55 110 37 44 104 7 23
107 25 42 40 0 0 15 0 2 15 197 -27 109 10 44 105 43 42 110 43 47 104 18 10
107 36 8 39 0 0 14 59 51 16 197 -28 109 20 0 105 55 16 110 51 59 104 30 40
107 48 27 38 0 0 14 59 39 17 197 -28 109 31 15 106 8 35 111 2 16 104 44 49
108 2 34 37 0 0 14 59 26 18 197 -29 109 44 25 106 23 36 111 14 36 105 0 35
108 18 27 36 0 0 14 59 12 19 198 -30 109 59 28 106 40 18 111 28 54 105 17 57
108 36 4 35 0 0 14 58 58 19 198 -31 110 16 21 106 58 37 111 45 8 105 36 53
108 55 24 34 0 0 14 58 43 20 198 -32 110 35 3 107 18 34 112 3 18 105 57 20
109 16 25 33 0 0 14 58 28 21 199 -33 110 55 33 107 40 6 112 23 20 106 19 19
109 39 7 32 0 0 14 58 11 22 199 -34 111 17 49 108 3 14 112 45 14 106 42 49
110 3 29 31 0 0 14 57 54 23 200 -35 111 41 51 108 27 56 113 9 0 107 7 50
110 29 31 30 0 0 14 57 36 24 200 -36 112 7 40 108 54 13 113 34 37 107 34 20
110 57 13 29 0 0 14 57 18 25 201 -37 112 35 14 109 22 5 114 2 6 108 2 22
111 26 37 28 0 0 14 56 59 25 201 -38 113 4 36 109 51 33 114 31 28 108 31 55
111 57 43 27 0 0 14 56 39 26 202 -39 113 35 46 110 22 38 115 2 44 109 3 0
112 30 32 26 0 0 14 56 18 27 202 -40 114 8 45 110 55 20 115 35 56 109 35 38
113 5 7 25 0 0 14 55 56 28 203 -41 114 43 37 111 29 42 116 11 6 110 9 52
113 41 30 24 0 0 14 55 34 28 203 -43 115 20 24 112 5 46 116 48 17 110 45 42
114 19 44 23 0 0 14 55 11 29 204 -44 115 59 8 112 43 34 117 27 33 111 23 12
114 59 51 22 0 0 14 54 47 30 205 -45 116 39 54 113 23 10 118 8 58 112 2 24
115 41 57 21 0 0 14 54 22 30 206 -46 117 22 47 114 4 36 118 52 38 112 43 21
116 26 5 20 0 0 14 53 57 31 206 -47 118 7 50 114 47 57 119 38 38 113 26 7
117 12 21 19 0 0 14 53 30 32 207 -48 118 55 12 115 33 17 120 27 4 114 10 46
118 0 51 18 0 0 14 53 3 32 208 -49 119 44 58 116 20 43 121 18 7 114 57 23
118 51 43 17 0 0 14 52 35 33 209 -51 120 37 17 117 10 19 122 11 54 115 46 3
119 45 4 16 0 0 14 52 6 33 210 -52 121 32 19 118 2 14 123 8 38 116 36 53
120 41 4 15 0 0 14 51 36 34 211 -53 122 30 16 118 56 35 124 8 33 117 30 1
121 39 55 14 0 0 14 51 4 34 212 -54 123 31 21 119 53 33 125 11 54 118 25 34
122 41 51 13 0 0 14 50 32 35 213 -56 124 35 50 120 53 18 126 19 1 119 23 43
123 47 6 12 0 0 14 49 59 35 214 -57 125 44 4 121 56 4 127 30 19 120 24 39
124 56 0 11 0 0 14 49 24 35 215 -58 126 56 25 123 2 6 128 46 16 121 28 35
126 8 56 10 0 0 14 48 48 35 217 -60 128 13 23 124 11 43 130 7 31 122 35 47
127 26 22 9 0 0 14 48 11 35 218 -61 129 35 36 125 25 18 131 34 52 123 46 34
128 48 54 8 0 0 14 47 32 36 219 -62 131 3 51 126 43 17 133 9 23 125 1 19
130 17 17 7 0 0 14 46 51 35 220 -64 132 39 10 128 6 15 134 52 31 126 20 28
131 52 30 6 0 0 14 46 8 35 222 -65 134 22 59 129 34 55 136 46 24 127 44 38
133 35 52 5 0 0 14 45 23 35 223 -67 136 17 22 131 10 15 138 54 18 129 14 31
135 29 18 4 0 0 14 44 34 35 225 -68 138 25 26 132 53 28 141 21 41 130 51 4
137 35 36 3 0 0 14 43 43 34 226 -69 140 52 22 134 46 21 144 19 23 132 35 32
Latitude Latitude Latitude Latitude
138 0 0 2 49 12 14 43 33 34 226 -70 4 11 20 1 29 57 5 24 33 0 23 49
139 0 0 2 23 44 14 43 9 33 227 -70 3 45 3 1 5 11 4 57 30 - 0 0 22
140 0 0 1 59 44 14 42 46 33 228 -71 3 20 20 0 41 52 4 32 4 - 0 23 10
141 0 0 1 37 13 14 42 23 33 228 -71 2 57 8 0 19 57 4 8 14 - 0 44 37
142 0 0 1 16 8 14 42 1 32 229 -71 2 35 26 - 0 0 35 3 45 57 - 1 4 42
143 0 0 0 56 28 14 41 39 32 229 -72 2 15 12 - 0 19 45 3 25 11 - 1 23 28
144 0 0 0 38 11 14 41 17 31 230 -72 1 56 25 - 0 37 34 3 5 55 - 1 40 55
145 0 0 0 21 16 14 40 56 31 230 -72 1 39 3 - 0 54 4 2 48 7 - 1 57 5
146 0 0 0 5 43 14 40 35 30 231 -72 1 23 5 - 1 9 15 2 31 46 - 2 11 58
147 0 0 - 0 8 29 14 40 15 30 231 -72 1 8 31 - 1 23 7 2 16 52 - 2 25 36
148 0 0 - 0 21 22 14 39 55 29 232 -72 0 55 20 - 1 35 43 2 3 22 - 2 37 58
149 0 0 - 0 32 56 14 39 36 28 232 -72 0 43 30 - 1 47 2 1 51 17 - 2 49 5
150 0 0 - 0 43 11 14 39 17 28 232 -71 0 33 1 - 1 57 4 1 40 36 - 2 58 57
151 0 0 - 0 52 7 14 38 58 27 233 -71 0 23 54 - 2 5 51 1 31 18 - 3 7 36
152 0 0 - 0 59 46 14 38 40 26 233 -71 0 16 7 - 2 13 22 1 23 23 - 3 15 1
153 0 0 - 1 6 7 14 38 23 26 233 -70 0 9 40 - 2 19 37 1 16 51 - 3 21 12
154 0 0 - 1 11 10 14 38 5 25 234 -70 0 4 33 - 2 24 38 1 11 41 - 3 26 9
155 0 0 - 1 14 56 14 37 48 24 234 -69 0 0 47 - 2 28 22 1 7 54 - 3 29 53
156 0 0 - 1 17 23 14 37 32 24 234 -69 - 0 1 39 - 2 30 51 1 5 30 - 3 32 23
157 0 0 - 1 18 33 14 37 16 23 234 -68 - 0 2 44 - 2 32 5 1 4 29 - 3 33 40
158 0 0 - 1 18 24 14 37 1 22 235 -68 - 0 2 28 - 2 32 2 1 4 51 - 3 33 41
159 0 0 - 1 16 56 14 36 46 21 235 -67 - 0 0 51 - 2 30 42 1 6 38 - 3 32 28
160 0 0 - 1 14 8 14 36 31 21 235 -66 0 2 9 - 2 28 5 1 9 49 - 3 30 0
161 0 0 - 1 10 0 14 36 17 20 235 -66 0 6 32 - 2 24 10 1 14 27 - 3 26 16
162 0 0 - 1 4 30 14 36 4 19 235 -65 0 12 20 - 2 18 57 1 20 31 - 3 21 15
163 0 0 - 0 57 38 14 35 51 18 235 -64 0 19 32 - 2 12 24 1 28 3 - 3 14 57
164 0 0 - 0 49 23 14 35 38 17 235 -63 0 28 11 - 2 4 30 1 37 4 - 3 7 20
165 0 0 - 0 39 43 14 35 26 16 236 -62 0 38 18 - 1 55 14 1 47 37 - 2 58 23
166 0 0 - 0 28 37 14 35 15 15 236 -62 0 49 54 - 1 44 35 1 59 42 - 2 48 5
167 0 0 - 0 16 2 14 35 4 15 236 -61 1 3 2 - 1 32 31 2 13 22 - 2 36 25
168 0 0 - 0 1 58 14 34 54 14 236 -60 1 17 44 - 1 19 1 2 28 39 - 2 23 22
169 0 0 0 13 37 14 34 44 13 236 -59 1 34 1 - 1 4 2 2 45 36 - 2 8 52
170 0 0 0 30 47 14 34 35 12 236 -58 1 51 56 - 0 47 33 3 4 15 - 1 52 55
171 0 0 0 49 34 14 34 27 11 236 -57 2 11 32 - 0 29 32 3 24 39 - 1 35 29
172 0 0 1 9 59 14 34 19 10 236 -56 2 32 53 - 0 9 55 3 46 52 - 1 16 30
173 0 0 1 32 7 14 34 12 9 236 -55 2 56 1 0 11 20 4 10 58 - 0 55 57
174 0 0 1 56 1 14 34 5 8 236 -54 3 21 0 0 34 15 4 37 1 - 0 33 47
175 0 0 2 21 44 14 33 59 7 236 -53 3 47 55 0 58 55 5 5 6 .. .. ..
176 0 0 2 49 21 14 33 54 6 236 -52 4 16 50 1 25 22 5 35 17 .. .. ..
177 0 0 3 18 56 14 33 50 4 236 -51 4 47 51 1 53 42 6 7 42 .. .. ..
178 0 0 3 50 35 14 33 47 3 237 -50 5 21 3 .. .. .. 6 42 26 .. .. ..
179 0 0 4 24 22 14 33 45 2 237 -48 5 56 34 .. .. .. 7 19 38 .. .. ..
180 0 0 5 0 24 14 33 43 1 237 -47 6 34 29 .. .. .. .. .. .. .. .. ..
Data for the target star
------------------------
* name: UCAC2 17787550
* constellation : Scorpius
* J2000 position with proper motion to date of event [h,m,s ; ?',"]
RA: 17 39 35.0006 DE: -33 03 12.439
* position source: UCAC2
* standard error: RA,DE ["]: ( .039, .039 )
* V mag [mag]: 11.8
* B mag [mag]: 0.0
* remarks:
Data for the minor planet
-------------------------
* general information:
(number) name: (209) Dido
approx. diameter [km]: 160
approx. diameter ["]: .101
distance from Earth [AU]: 2.17500
* orbital information:
orbit source: Preston
date of fit: 2006 Jul 19
source of used astrometry: FASTT MPC (via Astdys)
number of used observations: 610
number of rejected observations: 137
time covered by the observations: 1909 Jan 09 - 2006 Jul 12
1 sigma uncertainty ellipse (major, minor, PA): 0.024, 0.017, 94?
remarks:
* orbital elements for (209) Dido :
Mean anomaly = 25.56809106 deg
Arg. of pericenter = 250.09146639 deg
Long. of node = 0.78786477 deg
Inclination = 7.17128542 deg
Eccentricity = 0.06273154
Semimajor axis = 3.14483201 AU
 erihelion dist = 2.94755187 AU
Mag: H = 7.95, G = 0.15
Epoch of elements : MJD 53950.61500000 TDT
(2006 Aug 03.615)
------ occelmnt file for Occult BEGIN -----------------------------------
2006 Aug 03
209 Dido
14h 47.6m UT
11.8 17 39 35.001-33 3 12.44UCAC2 17787550 0.0
13.1 160 36.0 2.175 -0.539 7.51
90.941 -33.055 -40.36 17.43
14.7941 .60271 .54682 -1.68102 1.85758 0.00404 0.00052
2000 23.69211232006 724.00000250.091466 0.787865 7.1712850.062731543.144832012.947551878.245 0.15
RATE 1.7672903 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
Meas 0.046 0.042 91.1 1.430 0.044
------ occelmnt file for Occult END -----------------------------------
============================================
Calculator (s): Steve Preston
Date of update: 2006 Jul 20, 02:33 UT
Steve Preston
7640 NE 32nd St
Medina, WA 98039
425-688-9965
mailto: stevepr@acm.org |
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