IOTA/IOTA-ES occultation update for
(1888) Zu / UCAC4 393-128044 event on 2024 Oct 20, 10:16 UT
Visible from
Summary
-------
On 2024 Oct 20 UT, the 11.839 km diameter asteroid (1888) Zu will occult a 11.8
mag star in the constellation Capricornus for observers along a path across .
In the case of an occultation, the combined light of the asteroid and the star
will drop by 5.39 mag to 17.14 mag (the magnitude of the asteroid) for at most
1.270 seconds.
This update is based on, astrometry for the asteroid kindly provided by the IAU
Minor Planet Center.
This work has made use of data from the European Space Agency (ESA)
mission Gaia (http://www.cosmos.esa.int/gaia), processed by the
Gaia Data Processing and Analysis Consortium
(DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium).
Funding for the DPAC has been provided by national institutions, in
particular the institutions participating in the Gaia Multilateral Agreement.
The event at a glimpse
----------------------
* Rank: 93
* date and approx. time of event: 2024 Oct 20, 10:11 - 2024 Oct 20, 10:21
* geocentric midpoint of event [JD]: 2460603.92792721
* magnitude of target star: 11.76
* magnitude drop [mag]: 5.39
* estimated maximum duration [s]: 1.270
* Moon: 88 % sunlit, 117° distance
* Sun: 102° distance
* rough path description:
The occultation path
--------------------
* approximate projected width [km]: 29
* 1 sigma uncertainty interval [path widths]: +/- 0.47
* 1 sigma uncertainty interval [seconds]: +/- 1.6
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.003)
* 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.002", 74°)
* approx speed of asteroid's shadow [km/s]: 9.3497
* website for maps:
http://www.asteroidoccultation.com
Path Coordinates:
Occultation of UCAC4 393-128044 by 1888 Zu on 2024 Oct 20
Centre Star Star Sun Path Limits Error Limits Alt
E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' "
Latitude Latitude Latitude Latitude
63 0 0 64 43 14 10 11 35.5 0 118 9 64 34 28 .. .. .. 64 26 19 .. .. .. ....
64 0 0 64 29 45 10 11 35.6 0 118 9 64 21 0 64 38 34 64 12 52 64 46 52 -0.64
65 0 0 64 16 17 10 11 35.7 1 119 9 64 7 32 64 25 4 63 59 25 64 33 21 -1.42
66 0 0 64 2 48 10 11 36.0 1 120 9 63 54 4 64 11 34 63 45 58 64 19 50 -1.68
67 0 0 63 49 19 10 11 36.5 2 121 9 63 40 37 63 58 5 63 32 31 64 6 20 -1.82
68 0 0 63 35 51 10 11 37.0 2 122 8 63 27 10 63 44 36 63 19 5 63 52 50 -1.90
69 0 0 63 22 25 10 11 37.7 3 123 8 63 13 44 63 31 8 63 5 40 63 39 22 -1.95
70 0 0 63 8 59 10 11 38.5 3 124 8 63 0 20 63 17 42 62 52 17 63 25 54 -1.99
71 0 0 62 55 36 10 11 39.4 4 125 8 62 46 58 63 4 18 62 38 56 63 12 29 -2.02
72 0 0 62 42 16 10 11 40.5 4 126 8 62 33 38 62 50 56 62 25 37 62 59 7 -2.04
73 0 0 62 28 58 10 11 41.8 5 126 8 62 20 21 62 37 37 62 12 21 62 45 47 -2.06
74 0 0 62 15 43 10 11 43.1 5 127 7 62 7 8 62 24 22 61 59 8 62 32 30 -2.07
75 0 0 62 2 32 10 11 44.6 6 128 7 61 53 58 62 11 10 61 45 59 62 19 17 -2.09
76 0 0 61 49 25 10 11 46.3 6 129 7 61 40 52 61 58 2 61 32 55 62 6 8 -2.10
77 0 0 61 36 23 10 11 48.1 7 130 7 61 27 51 61 44 58 61 19 54 61 53 3 -2.11
78 0 0 61 23 25 10 11 50.0 8 131 6 61 14 54 61 31 59 61 6 59 61 40 3 -2.12
79 0 0 61 10 33 10 11 52.1 8 132 6 61 2 3 61 19 6 60 54 9 61 27 9 -2.12
80 0 0 60 57 46 10 11 54.3 9 133 6 60 49 18 61 6 18 60 41 24 61 14 20 -2.13
81 0 0 60 45 6 10 11 56.7 9 134 6 60 36 38 60 53 37 60 28 46 61 1 37 -2.14
82 0 0 60 32 32 10 11 59.2 10 135 5 60 24 6 60 41 2 60 16 15 60 49 1 -2.14
83 0 0 60 20 6 10 12 1.9 10 136 5 60 11 40 60 28 34 60 3 50 60 36 32 -2.15
84 0 0 60 7 46 10 12 4.7 11 136 5 59 59 22 60 16 14 59 51 33 60 24 11 -2.15
85 0 0 59 55 35 10 12 7.7 11 137 4 59 47 12 60 4 1 59 39 24 60 11 57 -2.16
86 0 0 59 43 32 10 12 10.8 12 138 4 59 35 10 59 51 57 59 27 23 59 59 52 -2.16
87 0 0 59 31 37 10 12 14.1 12 139 4 59 23 16 59 40 1 59 15 30 59 47 55 -2.16
88 0 0 59 19 52 10 12 17.5 12 140 3 59 11 32 59 28 14 59 3 47 59 36 7 -2.17
89 0 0 59 8 16 10 12 21.1 13 141 3 58 59 57 59 16 37 58 52 13 59 24 29 -2.17
90 0 0 58 56 49 10 12 24.8 13 142 2 58 48 32 59 5 10 58 40 49 59 13 1 -2.17
91 0 0 58 45 33 10 12 28.6 14 143 2 58 37 17 58 53 53 58 29 35 59 1 42 -2.18
92 0 0 58 34 28 10 12 32.6 14 144 2 58 26 12 58 42 46 58 18 31 58 50 35 -2.18
93 0 0 58 23 33 10 12 36.8 15 145 1 58 15 19 58 31 50 58 7 39 58 39 38 -2.18
94 0 0 58 12 50 10 12 41.1 15 146 1 58 4 37 58 21 6 57 56 58 58 28 53 -2.18
95 0 0 58 2 19 10 12 45.5 16 147 0 57 54 6 58 10 34 57 46 28 58 18 19 -2.19
96 0 0 57 51 59 10 12 50.0 16 148 0 57 43 48 58 0 13 57 36 11 58 7 58 -2.19
97 0 0 57 41 52 10 12 54.7 17 149 -1 57 33 42 57 50 5 57 26 6 57 57 49 -2.19
98 0 0 57 31 58 10 12 59.6 17 150 -1 57 23 49 57 40 10 57 16 14 57 47 53 -2.19
99 0 0 57 22 17 10 13 4.5 17 151 -2 57 14 9 57 30 28 57 6 34 57 38 10 -2.20
100 0 0 57 12 49 10 13 9.6 18 152 -2 57 4 42 57 20 59 56 57 8 57 28 40 -2.20
101 0 0 57 3 35 10 13 14.8 18 153 -2 56 55 29 57 11 44 56 47 56 57 19 24 -2.20
102 0 0 56 54 35 10 13 20.1 19 154 -3 56 46 29 57 2 43 56 38 58 57 10 22 -2.20
103 0 0 56 45 49 10 13 25.6 19 155 -3 56 37 45 56 53 57 56 30 14 57 1 35 -2.20
104 0 0 56 37 18 10 13 31.2 19 156 -4 56 29 15 56 45 25 56 21 44 56 53 2 -2.21
105 0 0 56 29 2 10 13 36.8 20 157 -5 56 20 59 56 37 8 56 13 30 56 44 44 -2.21
106 0 0 56 21 1 10 13 42.6 20 158 -5 56 12 59 56 29 6 56 5 31 56 36 42 -2.21
107 0 0 56 13 16 10 13 48.5 20 159 -6 56 5 15 56 21 20 55 57 47 56 28 55 -2.21
108 0 0 56 5 46 10 13 54.5 21 160 -6 55 57 46 56 13 49 55 50 19 56 21 24 -2.21
109 0 0 55 58 33 10 14 0.6 21 161 -7 55 50 33 56 6 35 55 43 6 56 14 9 -2.22
110 0 0 55 51 35 10 14 6.8 21 162 -7 55 43 36 55 59 37 55 36 10 56 7 10 -2.22
111 0 0 55 44 54 10 14 13.1 22 163 -8 55 36 56 55 52 55 55 29 31 56 0 27 -2.22
112 0 0 55 38 30 10 14 19.5 22 164 -8 55 30 32 55 46 30 55 23 8 55 54 2 -2.22
113 0 0 55 32 23 10 14 25.9 22 165 -9 55 24 26 55 40 22 55 17 2 55 47 53 -2.22
114 0 0 55 26 33 10 14 32.5 22 166 -9 55 18 36 55 34 32 55 11 13 55 42 2 -2.22
115 0 0 55 21 0 10 14 39.1 23 167 -10 55 13 4 55 28 58 55 5 41 55 36 28 -2.22
116 0 0 55 15 45 10 14 45.7 23 168 -11 55 7 49 55 23 42 55 0 27 55 31 12 -2.23
117 0 0 55 10 47 10 14 52.5 23 169 -11 55 2 52 55 18 44 54 55 30 55 26 13 -2.23
118 0 0 55 6 7 10 14 59.3 23 170 -12 54 58 13 55 14 4 54 50 51 55 21 32 -2.23
119 0 0 55 1 45 10 15 6.1 23 172 -12 54 53 51 55 9 42 54 46 30 55 17 9 -2.23
120 0 0 54 57 42 10 15 13.0 23 173 -13 54 49 48 55 5 37 54 42 28 55 13 5 -2.23
121 0 0 54 53 56 10 15 20.0 24 174 -14 54 46 3 55 1 52 54 38 43 55 9 19 -2.23
122 0 0 54 50 29 10 15 27.0 24 175 -14 54 42 37 54 58 24 54 35 17 55 5 51 -2.23
123 0 0 54 47 21 10 15 34.0 24 176 -15 54 39 28 54 55 16 54 32 9 55 2 42 -2.23
124 0 0 54 44 31 10 15 41.0 24 177 -15 54 36 39 54 52 25 54 29 20 54 59 52 -2.24
125 0 0 54 42 0 10 15 48.1 24 178 -16 54 34 8 54 49 54 54 26 49 54 57 20 -2.24
126 0 0 54 39 48 10 15 55.2 24 179 -17 54 31 56 54 47 42 54 24 37 54 55 7 -2.24
127 0 0 54 37 54 10 16 2.3 24 180 -17 54 30 3 54 45 48 54 22 44 54 53 13 -2.24
128 0 0 54 36 20 10 16 9.4 24 181 -18 54 28 29 54 44 13 54 21 10 54 51 38 -2.24
129 0 0 54 35 4 10 16 16.6 24 183 -18 54 27 13 54 42 58 54 19 55 54 50 23 -2.24
130 0 0 54 34 8 10 16 23.7 24 184 -19 54 26 17 54 42 1 54 18 58 54 49 26 -2.24
131 0 0 54 33 30 10 16 30.8 24 185 -20 54 25 39 54 41 23 54 18 21 54 48 48 -2.24
132 0 0 54 33 12 10 16 37.9 24 186 -20 54 25 21 54 41 5 54 18 3 54 48 30 -2.24
133 0 0 54 33 12 10 16 45.0 24 187 -21 54 25 22 54 41 5 54 18 3 54 48 30 -2.24
134 0 0 54 33 32 10 16 52.1 24 188 -21 54 25 41 54 41 25 54 18 23 54 48 50 -2.24
135 0 0 54 34 11 10 16 59.1 24 189 -22 54 26 20 54 42 4 54 19 2 54 49 29 -2.24
136 0 0 54 35 9 10 17 6.1 24 190 -22 54 27 18 54 43 2 54 19 59 54 50 27 -2.24
137 0 0 54 36 26 10 17 13.1 23 191 -23 54 28 35 54 44 19 54 21 16 54 51 44 -2.25
138 0 0 54 38 1 10 17 20.0 23 193 -24 54 30 10 54 45 55 54 22 52 54 53 20 -2.25
139 0 0 54 39 56 10 17 26.9 23 194 -24 54 32 4 54 47 50 54 24 46 54 55 15 -2.25
140 0 0 54 42 9 10 17 33.7 23 195 -25 54 34 18 54 50 3 54 26 59 54 57 29 -2.25
141 0 0 54 44 41 10 17 40.5 23 196 -25 54 36 50 54 52 36 54 29 30 55 0 2 -2.25
142 0 0 54 47 32 10 17 47.2 23 197 -26 54 39 40 54 55 27 54 32 21 55 2 53 -2.25
143 0 0 54 50 41 10 17 53.8 22 198 -26 54 42 49 54 58 36 54 35 29 55 6 3 -2.25
144 0 0 54 54 9 10 18 0.4 22 199 -27 54 46 16 55 2 4 54 38 56 55 9 31 -2.25
145 0 0 54 57 55 10 18 6.9 22 200 -27 54 50 2 55 5 51 54 42 42 55 13 18 -2.25
146 0 0 55 1 59 10 18 13.3 22 201 -28 54 54 6 55 9 55 54 46 45 55 17 23 -2.25
147 0 0 55 6 22 10 18 19.6 21 202 -28 54 58 28 55 14 18 54 51 6 55 21 46 -2.25
148 0 0 55 11 2 10 18 25.8 21 203 -29 55 3 7 55 18 59 54 55 46 55 26 27 -2.25
149 0 0 55 15 59 10 18 32.0 21 204 -29 55 8 4 55 23 57 55 0 42 55 31 26 -2.25
150 0 0 55 21 15 10 18 38.0 20 205 -30 55 13 19 55 29 13 55 5 57 55 36 42 -2.25
151 0 0 55 26 47 10 18 44.0 20 206 -30 55 18 51 55 34 46 55 11 28 55 42 16 -2.25
152 0 0 55 32 37 10 18 49.8 20 207 -31 55 24 41 55 40 37 55 17 17 55 48 7 -2.25
153 0 0 55 38 44 10 18 55.5 19 208 -31 55 30 47 55 46 44 55 23 23 55 54 15 -2.25
154 0 0 55 45 8 10 19 1.1 19 209 -32 55 37 10 55 53 8 55 29 45 56 0 40 -2.25
155 0 0 55 51 48 10 19 6.6 19 210 -32 55 43 49 55 59 49 55 36 24 56 7 22 -2.25
156 0 0 55 58 44 10 19 12.0 18 211 -33 55 50 45 56 6 46 55 43 19 56 14 19 -2.25
157 0 0 56 5 57 10 19 17.3 18 212 -33 55 57 57 56 13 59 55 50 30 56 21 33 -2.25
158 0 0 56 13 25 10 19 22.4 17 213 -33 56 5 24 56 21 29 55 57 57 56 29 3 -2.25
159 0 0 56 21 9 10 19 27.4 17 214 -34 56 13 8 56 29 13 56 5 40 56 36 49 -2.25
160 0 0 56 29 9 10 19 32.3 16 215 -34 56 21 6 56 37 14 56 13 37 56 44 50 -2.25
161 0 0 56 37 23 10 19 37.0 16 216 -34 56 29 20 56 45 29 56 21 50 56 53 6 -2.25
162 0 0 56 45 53 10 19 41.6 16 217 -35 56 37 48 56 53 59 56 30 18 57 1 37 -2.25
163 0 0 56 54 36 10 19 46.1 15 218 -35 56 46 31 57 2 44 56 39 0 57 10 22 -2.25
164 0 0 57 3 34 10 19 50.4 15 219 -35 56 55 29 57 11 43 56 47 57 57 19 22 -2.25
165 0 0 57 12 46 10 19 54.5 14 220 -36 57 4 39 57 20 56 56 57 7 57 28 36 -2.25
166 0 0 57 22 11 10 19 58.6 14 221 -36 57 14 4 57 30 22 57 6 30 57 38 3 -2.25
167 0 0 57 31 50 10 20 2.5 13 222 -36 57 23 41 57 40 1 57 16 7 57 47 43 -2.25
168 0 0 57 41 42 10 20 6.2 13 223 -37 57 33 32 57 49 54 57 25 56 57 57 37 -2.25
169 0 0 57 51 46 10 20 9.8 12 224 -37 57 43 35 57 59 59 57 35 59 58 7 43 -2.25
170 0 0 58 2 2 10 20 13.2 12 225 -37 57 53 50 58 10 16 57 46 13 58 18 1 -2.26
171 0 0 58 12 30 10 20 16.5 11 225 -37 58 4 18 58 20 46 57 56 39 58 28 32 -2.26
172 0 0 58 23 10 10 20 19.6 11 226 -37 58 14 57 58 31 27 58 7 17 58 39 14 -2.26
173 0 0 58 34 1 10 20 22.6 10 227 -38 58 25 47 58 42 19 58 18 6 58 50 7 -2.26
174 0 0 58 45 3 10 20 25.4 10 228 -38 58 36 47 58 53 22 58 29 6 59 1 11 -2.26
175 0 0 58 56 15 10 20 28.1 9 229 -38 58 47 59 59 4 35 58 40 16 59 12 25 -2.26
176 0 0 59 7 38 10 20 30.6 9 230 -38 58 59 20 59 15 59 58 51 37 59 23 50 -2.26
177 0 0 59 19 10 10 20 32.9 8 231 -38 59 10 51 59 27 32 59 3 7 59 35 24 -2.27
178 0 0 59 30 51 10 20 35.1 8 232 -38 59 22 31 59 39 14 59 14 46 59 47 8 -2.27
179 0 0 59 42 42 10 20 37.2 7 233 -38 59 34 20 59 51 6 59 26 34 59 59 0 -2.27
180 0 0 59 54 41 10 20 39.1 7 234 -38 59 46 18 60 3 6 59 38 31 60 11 1 -2.28
-179 0 0 60 6 47 10 20 40.8 6 234 -38 59 58 24 60 15 14 59 50 36 60 23 11 -2.28
-178 0 0 60 19 2 10 20 42.4 6 235 -38 60 10 38 60 27 30 60 2 48 60 35 28 -2.28
-177 0 0 60 31 24 10 20 43.8 5 236 -38 60 22 59 60 39 53 60 15 8 60 47 52 -2.29
-176 0 0 60 43 54 10 20 45.1 4 237 -38 60 35 27 60 52 24 60 27 35 61 0 23 -2.30
-175 0 0 60 56 29 10 20 46.2 4 238 -38 60 48 1 61 5 0 60 40 9 61 13 1 -2.31
-174 0 0 61 9 11 10 20 47.2 3 239 -38 61 0 42 61 17 43 60 52 48 61 25 45 -2.32
-173 0 0 61 21 59 10 20 48.0 3 240 -38 61 13 28 61 30 32 61 5 34 61 38 35 -2.34
-172 0 0 61 34 52 10 20 48.7 2 241 -38 61 26 20 61 43 26 61 18 25 61 51 30 -2.36
-171 0 0 61 47 50 10 20 49.3 2 241 -38 61 39 17 61 56 25 61 31 20 62 4 31 -2.40
-170 0 0 62 0 52 10 20 49.7 1 242 -38 61 52 18 62 9 29 61 44 21 62 17 35 -2.47
-169 0 0 62 13 58 10 20 50.0 1 243 -38 62 5 24 62 22 36 61 57 25 62 30 44 -2.62
-168 0 0 62 27 9 10 20 50.1 0 244 -38 62 18 33 62 35 48 62 10 33 62 43 56 -3.29
Uncertainty in time = +/- 2 secs
Prediction of 2023 Jul 15.6
Data for the target star
------------------------
* name: UCAC4 393-128044
* constellation : Capricornus
* BCRS position with proper motion to date of event [h,m,s ; °,',"]
RA: 20 38 42.7460 DE: -11 32 28.948
* GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"]
RA: 20 38 42.7459 DE: -11 32 28.948
* position source: Gaia DR3
* standard error: RA,DE [mas]: (0.200,0.100)
* V mag [mag]: 11.8
* B mag [mag]: 12.0
* Diameter [mas]: 0.00
* remarks:
Data for the minor planet
-------------------------
* general information:
(number) name: (1888) Zu
asteroid class:
approx. diameter [km]: 12
approx. diameter ["]: 0.006
distance from Earth [AU]: 2.52430
asteroid position offset in RA [mas]: 0
asteroid position offset in DE [mas]: 0
* orbital information:
orbit source: JPL#55
date of fit: 2023 Apr 24
source of used astrometry: MPC, JPL
number of used observations: 0
number of rejected observations: 0
time covered by the observations: 1800 Jan 01 - 1800 Jan 01
1 sigma uncertainty ellipse (major, minor, PA): 0.008", 0.002", 73.501°
remarks:
* orbital elements for (1888)Zu :
Mean anomaly = 221.1928509658 deg
Arg. of pericenter = 233.8795143419 deg
Long. of node = 244.7245709858 deg
Inclination = 5.8528647649 deg
Eccentricity = 0.1695249450
Semimajor axis = 2.5453986533 AU
Perihelion dist = 2.1138900867 AU
Mag: H = 11.83, G = 0.15
Epoch of elements : MJD 60603.42792667 TDT
(2024 Oct 20.4279)
------ occelmnt file for Occult BEGIN -----------------------------------
<Occultations>
<Event>
<Elements>JPL#552023Apr24,1.27,2024,10,20,10.270253,0.019176,0.910509,5.276103,-0.109837,0.005520,0.001322,0.000000,0.000000</Elements>
<Earth>126.5957,-11.4542,22.13,-10.59,False</Earth>
<Star>UCAC4 393-128044,20.64520724,-11.5413743,12.03,11.76,11.61,0.0,0,,20.66785943,-11.4541807,5.39,5.08,0,0,0</Star>
<Object>1888,Zu,17.14,11.839,2.5243,0,0,1.251,-0.38,,1.0,0</Object>
<Orbit>0,221.0890,2024,10,20,233.8795,244.7246,5.8529,0.16952,2.54540,2.11389,11.83,5.0,0.15</Orbit>
<Errors>1.468,0.0083,0.0018,74,0.0030,Known errors,1.17,0,-1,-1</Errors>
<ID>20241020_128044,60140.65</ID>
</Event>
</Occultations>
------ occelmnt file for Occult END -----------------------------------
============================================
Calculator (s): Steve Preston
Date of update: 2023 Jul 15, 15:32 UT
Steve Preston
7640 NE 32nd St
Medina, WA 98039
stevepr@acm.org