IOTA/IOTA-ES occultation update for (1389) Onnie / TYC 6329-01581-1 event on 2007 Aug 01, 13:34 UT Visible from Indonesia Summary ------- On 2007 Aug 01 UT, the 28 km diameter asteroid (1389) Onnie will occult a 10.4 mag star in the constellation Capricornus for observers along a path across Indonesia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.1 mag to 15.5 mag (the magnitude of the asteroid) for at most 2.3 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. The event at a glimpse ---------------------- * Rank: 32 * date and approx. time of event: 2007 Aug 01, 13:25 - 2007 Aug 01, 13:42 UT * midpoint of event [JD]: 2454314.06532917 * magnitude of target star: 10.4 * magnitude drop [mag]: 5.1 * estimated maximum duration [s]: 2.3 * Moon: 92 % sunlit, 35° distance * Sun: 176° distance * rough path description: Indonesia The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 2.08 * 1 sigma uncertainty interval [seconds]: +/- 6.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .054 +/- .042) * 1 sigma uncertainty ellipse (major, minor, PA): ( .054", .041", 79° ) * approx speed of asteroid's shadow [km/s]: 11.9534 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6329-01581-1 by 1389 Onnie on 2007 Aug 01 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 ' " Latitude Latitude Latitude Latitude 65 0 0 .. .. .. .. .. .. .. .. .. .. .. .. 7 37 0 .. .. .. .. .. .. 66 0 0 7 28 4 13 42 10 1 107 2 7 36 48 7 19 20 8 13 17 .. .. .. 67 0 0 7 10 46 13 42 10 2 107 1 7 19 30 7 2 4 7 55 54 .. .. .. 68 0 0 6 53 53 13 42 9 3 107 0 7 2 35 6 45 11 7 38 55 .. .. .. 69 0 0 6 37 23 13 42 9 4 107 -1 6 46 4 6 28 42 7 22 20 .. .. .. 70 0 0 6 21 16 13 42 8 5 107 -2 6 29 57 6 12 37 7 6 9 5 36 40 71 0 0 6 5 34 13 42 7 6 107 -3 6 14 14 5 56 55 6 50 22 5 21 3 72 0 0 5 50 17 13 42 6 7 107 -4 5 58 55 5 41 39 6 35 0 5 5 50 73 0 0 5 35 24 13 42 4 8 108 -5 5 44 1 5 26 46 6 20 2 4 51 2 74 0 0 5 20 55 13 42 3 9 108 -6 5 29 32 5 12 19 6 5 29 4 36 38 75 0 0 5 6 51 13 42 1 10 108 -7 5 15 27 4 58 16 5 51 21 4 22 38 76 0 0 4 53 13 13 41 59 11 108 -8 5 1 48 4 44 38 5 37 38 4 9 4 77 0 0 4 39 59 13 41 57 12 108 -9 4 48 33 4 31 25 5 24 20 3 55 54 78 0 0 4 27 10 13 41 55 13 108 -10 4 35 44 4 18 37 5 11 27 3 43 10 79 0 0 4 14 47 13 41 52 14 108 -11 4 23 20 4 6 15 4 59 0 3 30 50 80 0 0 4 2 49 13 41 49 15 108 -12 4 11 21 3 54 18 4 46 58 3 18 56 81 0 0 3 51 17 13 41 47 16 108 -13 3 59 48 3 42 46 4 35 22 3 7 28 82 0 0 3 40 10 13 41 44 17 108 -14 3 48 40 3 31 40 4 24 11 2 56 25 83 0 0 3 29 29 13 41 41 18 109 -15 3 37 59 3 20 59 4 13 26 2 45 47 84 0 0 3 19 13 13 41 37 19 109 -16 3 27 42 3 10 44 4 3 7 2 35 35 85 0 0 3 9 23 13 41 34 20 109 -17 3 17 52 3 0 55 3 53 14 2 25 48 86 0 0 2 59 59 13 41 30 21 109 -18 3 8 27 2 51 32 3 43 47 2 16 27 87 0 0 2 51 1 13 41 27 22 109 -19 2 59 28 2 42 34 3 34 45 2 7 32 88 0 0 2 42 29 13 41 23 23 109 -20 2 50 56 2 34 3 3 26 10 1 59 3 89 0 0 2 34 22 13 41 19 24 109 -21 2 42 49 2 25 57 3 18 1 1 50 59 90 0 0 2 26 42 13 41 14 25 109 -22 2 35 8 2 18 17 3 10 18 1 43 21 91 0 0 2 19 27 13 41 10 26 110 -23 2 27 53 2 11 3 3 3 1 1 36 9 92 0 0 2 12 39 13 41 5 27 110 -24 2 21 4 2 4 15 2 56 10 1 29 23 93 0 0 2 6 17 13 41 1 28 110 -25 2 14 41 1 57 53 2 49 45 1 23 3 94 0 0 2 0 20 13 40 56 29 110 -25 2 8 44 1 51 57 2 43 47 1 17 9 95 0 0 1 54 50 13 40 51 30 110 -26 2 3 13 1 46 27 2 38 14 1 11 40 96 0 0 1 49 45 13 40 46 31 110 -27 1 58 8 1 41 23 2 33 8 1 6 38 97 0 0 1 45 7 13 40 41 32 111 -28 1 53 30 1 36 44 2 28 28 1 2 1 98 0 0 1 40 54 13 40 35 33 111 -29 1 49 17 1 32 32 2 24 14 0 57 50 99 0 0 1 37 8 13 40 30 34 111 -30 1 45 30 1 28 46 2 20 26 0 54 5 100 0 0 1 33 47 13 40 24 35 111 -31 1 42 9 1 25 26 2 17 4 0 50 46 101 0 0 1 30 53 13 40 19 35 112 -32 1 39 15 1 22 32 2 14 8 0 47 52 102 0 0 1 28 24 13 40 13 36 112 -33 1 36 46 1 20 3 2 11 39 0 45 25 103 0 0 1 26 22 13 40 7 37 112 -34 1 34 43 1 18 1 2 9 35 0 43 23 104 0 0 1 24 45 13 40 1 38 112 -35 1 33 6 1 16 24 2 7 58 0 41 47 105 0 0 1 23 34 13 39 54 39 113 -36 1 31 56 1 15 14 2 6 46 0 40 37 106 0 0 1 22 49 13 39 48 40 113 -37 1 31 10 1 14 29 2 6 1 0 39 52 107 0 0 1 22 30 13 39 42 41 113 -37 1 30 51 1 14 10 2 5 42 0 39 34 108 0 0 1 22 37 13 39 35 42 114 -38 1 30 58 1 14 16 2 5 48 0 39 40 109 0 0 1 23 9 13 39 28 43 114 -39 1 31 30 1 14 49 2 6 20 0 40 13 110 0 0 1 24 7 13 39 22 44 114 -40 1 32 28 1 15 47 2 7 18 0 41 11 111 0 0 1 25 31 13 39 15 44 115 -41 1 33 52 1 17 10 2 8 42 0 42 34 112 0 0 1 27 20 13 39 8 45 115 -42 1 35 41 1 19 0 2 10 32 0 44 23 113 0 0 1 29 35 13 39 1 46 116 -43 1 37 56 1 21 14 2 12 47 0 46 37 114 0 0 1 32 15 13 38 53 47 116 -44 1 40 37 1 23 55 2 15 28 0 49 17 115 0 0 1 35 21 13 38 46 48 117 -44 1 43 43 1 27 0 2 18 35 0 52 22 116 0 0 1 38 52 13 38 39 49 118 -45 1 47 14 1 30 31 2 22 7 0 55 52 117 0 0 1 42 49 13 38 31 50 118 -46 1 51 11 1 34 28 2 26 5 0 59 48 118 0 0 1 47 11 13 38 24 50 119 -47 1 55 33 1 38 49 2 30 28 1 4 9 119 0 0 1 51 58 13 38 16 51 119 -48 2 0 20 1 43 36 2 35 16 1 8 54 120 0 0 1 57 10 13 38 8 52 120 -48 2 5 33 1 48 48 2 40 30 1 14 5 121 0 0 2 2 47 13 38 0 53 121 -49 2 11 10 1 54 25 2 46 9 1 19 41 122 0 0 2 8 49 13 37 52 54 122 -50 2 17 13 2 0 27 2 52 13 1 25 41 123 0 0 2 15 17 13 37 44 54 123 -51 2 23 40 2 6 54 2 58 42 1 32 6 124 0 0 2 22 9 13 37 36 55 124 -51 2 30 33 2 13 45 3 5 36 1 38 56 125 0 0 2 29 25 13 37 28 56 125 -52 2 37 50 2 21 1 3 12 54 1 46 11 126 0 0 2 37 7 13 37 20 56 126 -53 2 45 32 2 28 42 3 20 38 1 53 50 127 0 0 2 45 13 13 37 11 57 127 -54 2 53 38 2 36 48 3 28 46 2 1 54 128 0 0 2 53 43 13 37 3 58 128 -54 3 2 9 2 45 18 3 37 19 2 10 22 129 0 0 3 2 38 13 36 54 59 129 -55 3 11 4 2 54 12 3 46 17 2 19 14 130 0 0 3 11 57 13 36 46 59 130 -56 3 20 24 3 3 31 3 55 38 2 28 31 131 0 0 3 21 40 13 36 37 60 132 -56 3 30 8 3 13 13 4 5 24 2 38 11 132 0 0 3 31 47 13 36 29 60 133 -57 3 40 15 3 23 20 4 15 35 2 48 15 133 0 0 3 42 19 13 36 20 61 134 -58 3 50 47 3 33 51 4 26 9 2 58 44 134 0 0 3 53 14 13 36 11 61 136 -58 4 1 43 3 44 45 4 37 7 3 9 35 135 0 0 4 4 32 13 36 2 62 138 -59 4 13 2 3 56 3 4 48 29 3 20 51 136 0 0 4 16 14 13 35 53 63 139 -59 4 24 45 4 7 44 5 0 14 3 32 30 137 0 0 4 28 20 13 35 45 63 141 -60 4 36 51 4 19 49 5 12 23 3 44 32 138 0 0 4 40 48 13 35 36 63 143 -60 4 49 20 4 32 17 5 24 55 3 56 57 139 0 0 4 53 40 13 35 27 64 145 -61 5 2 13 4 45 8 5 37 51 4 9 45 140 0 0 5 6 55 13 35 18 64 147 -61 5 15 28 4 58 22 5 51 9 4 22 56 141 0 0 5 20 32 13 35 8 64 149 -61 5 29 6 5 11 59 6 4 51 4 36 30 142 0 0 5 34 32 13 34 59 65 151 -62 5 43 7 5 25 58 6 18 54 4 50 26 143 0 0 5 48 55 13 34 50 65 153 -62 5 57 30 5 40 20 6 33 21 5 4 45 144 0 0 6 3 39 13 34 41 65 155 -62 6 12 16 5 55 4 6 48 9 5 19 25 145 0 0 6 18 46 13 34 32 65 157 -63 6 27 23 6 10 10 7 3 20 5 34 28 146 0 0 6 34 14 13 34 23 65 160 -63 6 42 52 6 25 37 7 18 53 5 49 52 147 0 0 6 50 4 13 34 13 66 162 -63 6 58 43 6 41 26 7 34 47 6 5 38 148 0 0 7 6 15 13 34 4 66 164 -63 7 14 55 6 57 36 7 51 2 6 21 45 149 0 0 7 22 48 13 33 55 66 167 -63 7 31 28 7 14 8 8 7 39 6 38 13 150 0 0 7 39 41 13 33 46 65 169 -63 7 48 22 7 31 0 8 24 37 6 55 1 151 0 0 7 56 54 13 33 36 65 171 -63 8 5 36 7 48 13 8 41 55 7 12 11 152 0 0 8 14 28 13 33 27 65 173 -63 8 23 11 8 5 46 8 59 33 7 29 40 153 0 0 8 32 23 13 33 18 65 176 -63 8 41 6 8 23 39 9 17 32 7 47 30 154 0 0 8 50 36 13 33 9 65 178 -63 8 59 21 8 41 52 9 35 51 8 5 39 155 0 0 9 9 10 13 33 0 64 180 -63 9 17 55 9 0 25 9 54 29 8 24 8 156 0 0 9 28 2 13 32 50 64 182 -62 9 36 49 9 19 17 10 13 26 8 42 56 157 0 0 9 47 14 13 32 41 64 184 -62 9 56 1 9 38 27 10 32 42 9 2 3 158 0 0 10 6 44 13 32 32 63 186 -62 10 15 32 9 57 56 10 52 17 9 21 28 159 0 0 10 26 32 13 32 23 63 188 -62 10 35 21 10 17 43 11 12 10 9 41 11 160 0 0 10 46 38 13 32 14 62 190 -61 10 55 28 10 37 48 11 32 20 10 1 13 161 0 0 11 7 1 13 32 5 62 192 -61 11 15 52 10 58 11 11 52 49 10 21 32 162 0 0 11 27 42 13 31 56 61 194 -60 11 36 34 11 18 51 12 13 34 10 42 7 163 0 0 11 48 39 13 31 47 61 195 -60 11 57 32 11 39 47 12 34 36 11 3 0 164 0 0 12 9 53 13 31 38 60 197 -59 12 18 47 12 1 0 12 55 54 11 24 9 165 0 0 12 31 22 13 31 29 60 198 -59 12 40 17 12 22 28 13 17 29 11 45 34 166 0 0 12 53 8 13 31 20 59 200 -58 13 2 3 12 44 13 13 39 19 12 7 15 167 0 0 13 15 8 13 31 11 58 201 -58 13 24 4 13 6 12 14 1 24 12 29 10 168 0 0 13 37 23 13 31 2 58 203 -57 13 46 20 13 28 26 14 23 43 12 51 21 169 0 0 13 59 52 13 30 54 57 204 -57 14 8 50 13 50 54 14 46 17 13 13 45 170 0 0 14 22 35 13 30 45 56 205 -56 14 31 34 14 13 36 15 9 4 13 36 23 171 0 0 14 45 31 13 30 37 55 207 -55 14 54 31 14 36 31 15 32 5 13 59 15 172 0 0 15 8 39 13 30 28 55 208 -55 15 17 40 14 59 39 15 55 18 14 22 20 173 0 0 15 32 1 13 30 20 54 209 -54 15 41 2 15 23 0 16 18 43 14 45 36 174 0 0 15 55 34 13 30 12 53 210 -53 16 4 36 15 46 32 16 42 21 15 9 5 175 0 0 16 19 18 13 30 3 52 211 -52 16 28 21 16 10 15 17 6 9 15 32 45 176 0 0 16 43 13 13 29 55 51 212 -52 16 52 17 16 34 9 17 30 8 15 56 36 177 0 0 17 7 18 13 29 47 51 213 -51 17 16 23 16 58 13 17 54 17 16 20 37 178 0 0 17 31 32 13 29 39 50 214 -50 17 40 38 17 22 27 18 18 36 16 44 48 179 0 0 17 55 56 13 29 32 49 215 -49 18 5 3 17 46 50 18 43 4 17 9 8 180 0 0 18 20 28 13 29 24 48 216 -48 18 29 36 18 11 22 19 7 40 17 33 37 -179 0 0 18 45 9 13 29 16 47 217 -48 18 54 17 18 36 2 19 32 24 17 58 13 -178 0 0 19 9 56 13 29 9 46 217 -47 19 19 5 19 0 49 19 57 15 18 22 57 -177 0 0 19 34 51 13 29 1 45 218 -46 19 44 0 19 25 42 20 22 13 18 47 49 -176 0 0 19 59 51 13 28 54 44 219 -45 20 9 1 19 50 42 20 47 17 19 12 46 -175 0 0 20 24 58 13 28 47 44 220 -44 20 34 8 20 15 48 21 12 26 19 37 49 -174 0 0 20 50 9 13 28 40 43 221 -43 20 59 20 20 40 58 21 37 40 20 2 57 -173 0 0 21 15 24 13 28 33 42 221 -42 21 24 36 21 6 13 22 2 58 20 28 10 -172 0 0 21 40 43 13 28 27 41 222 -42 21 49 55 21 31 32 22 28 20 20 53 26 -171 0 0 22 6 6 13 28 20 40 223 -41 22 15 18 21 56 54 22 53 45 21 18 46 -170 0 0 22 31 30 13 28 14 39 223 -40 22 40 43 22 22 18 23 19 12 21 44 9 -169 0 0 22 56 57 13 28 7 38 224 -39 23 6 10 22 47 44 23 44 41 22 9 33 -168 0 0 23 22 25 13 28 1 37 225 -38 23 31 39 23 13 12 24 10 11 22 34 59 -167 0 0 23 47 53 13 27 55 36 225 -37 23 57 7 23 38 40 24 35 41 23 0 26 -166 0 0 24 13 22 13 27 49 35 226 -36 24 22 36 24 4 8 25 1 11 23 25 52 -165 0 0 24 38 49 13 27 43 34 227 -35 24 48 4 24 29 35 25 26 40 23 51 18 -164 0 0 25 4 16 13 27 38 33 227 -34 25 13 31 24 55 1 25 52 8 24 16 44 -163 0 0 25 29 40 13 27 32 32 228 -33 25 38 55 25 20 26 26 17 33 24 42 7 -162 0 0 25 55 2 13 27 27 31 228 -33 26 4 17 25 45 47 26 42 56 25 7 28 -161 0 0 26 20 21 13 27 22 31 229 -32 26 29 36 26 11 6 27 8 16 25 32 46 -160 0 0 26 45 35 13 27 17 30 230 -31 26 54 51 26 36 20 27 33 31 25 58 0 -159 0 0 27 10 46 13 27 12 29 230 -30 27 20 2 27 1 31 27 58 42 26 23 10 -158 0 0 27 35 51 13 27 7 28 231 -29 27 45 7 27 26 36 28 23 47 26 48 15 -157 0 0 28 0 51 13 27 3 27 231 -28 28 10 7 27 51 36 28 48 47 27 13 15 -156 0 0 28 25 45 13 26 59 26 232 -27 28 35 0 28 16 30 29 13 40 27 38 9 -155 0 0 28 50 31 13 26 54 25 232 -26 28 59 47 28 41 16 29 38 27 28 2 56 -154 0 0 29 15 11 13 26 50 24 233 -25 29 24 26 29 5 56 30 3 5 28 27 36 -153 0 0 29 39 42 13 26 47 23 233 -24 29 48 57 29 30 27 30 27 36 28 52 9 -152 0 0 30 4 5 13 26 43 22 234 -23 30 13 20 29 54 51 30 51 58 29 16 32 -151 0 0 30 28 19 13 26 39 21 235 -22 30 37 34 30 19 5 31 16 10 29 40 47 -150 0 0 30 52 23 13 26 36 20 235 -22 31 1 37 30 43 9 31 40 13 30 4 53 -149 0 0 31 16 17 13 26 33 19 236 -21 31 25 31 31 7 3 32 4 5 30 28 49 -148 0 0 31 40 0 13 26 30 18 236 -20 31 49 14 31 30 47 32 27 47 30 52 34 -147 0 0 32 3 33 13 26 27 18 237 -19 32 12 46 31 54 20 32 51 17 31 16 8 -146 0 0 32 26 54 13 26 24 17 237 -18 32 36 7 32 17 41 33 14 36 31 39 31 -145 0 0 32 50 2 13 26 21 16 238 -17 32 59 15 32 40 50 33 37 42 32 2 42 -144 0 0 33 12 58 13 26 19 15 239 -16 33 22 10 33 3 47 34 0 35 32 25 41 -143 0 0 33 35 41 13 26 17 14 239 -15 33 44 53 33 26 31 34 23 16 32 48 27 -142 0 0 33 58 11 13 26 14 13 240 -14 34 7 22 33 49 1 34 45 42 33 10 59 -141 0 0 34 20 27 13 26 12 12 240 -13 34 29 37 34 11 17 35 7 55 33 33 18 -140 0 0 34 42 29 13 26 11 11 241 -13 34 51 38 34 33 19 35 29 54 33 55 23 -139 0 0 35 4 16 13 26 9 10 241 -12 35 13 25 34 55 7 35 51 37 34 17 13 -138 0 0 35 25 48 13 26 7 9 242 -11 35 34 56 35 16 40 36 13 6 34 38 49 -137 0 0 35 47 4 13 26 6 9 243 -10 35 56 12 35 37 57 36 34 19 35 0 9 -136 0 0 36 8 5 13 26 5 8 243 -9 36 17 12 35 58 59 36 55 16 35 21 14 -135 0 0 36 28 51 13 26 3 7 244 -8 36 37 57 36 19 45 37 15 57 35 42 3 -134 0 0 36 49 19 13 26 3 6 244 -7 36 58 25 36 40 15 37 36 22 36 2 36 -133 0 0 37 9 32 13 26 2 5 245 -6 37 18 36 37 0 28 37 56 30 36 22 53 -132 0 0 37 29 27 13 26 1 4 246 -6 37 38 31 37 20 24 38 16 21 36 42 52 -131 0 0 37 49 5 13 26 0 3 246 -5 37 58 8 37 40 3 38 35 54 .. .. .. -130 0 0 38 8 26 13 26 0 3 247 -4 38 17 28 37 59 25 38 55 11 .. .. .. -129 0 0 38 27 29 13 26 0 2 247 -3 38 36 31 38 18 29 39 14 9 .. .. .. -128 0 0 38 46 15 13 25 59 1 248 -2 38 55 15 38 37 15 39 32 50 .. .. .. -127 0 0 .. .. .. .. .. .. .. .. .. .. .. .. 38 55 44 .. .. .. .. .. .. Data for the target star ------------------------ * name: TYC 6329-01581-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 31 43.6848 DE: -16 29 17.177 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .019 ) * V mag [mag]: 10.4 * B mag [mag]: 10.9 * Apparent position with proper motion RA(deg): 308.0471806017 DE(deg): -16.4620856237 * Equation of equinoxes (radians) : 0.000033321268587 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1389) Onnie approx. diameter [km]: 28 approx. diameter ["]: .020 distance from Earth [AU]: 1.89200 * orbital information: orbit source: Preston date of fit: 2007 Jul 01 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 912 number of rejected observations: 39 time covered by the observations: 1935 Sep 28 - 2007 Jun 23 1 sigma uncertainty ellipse (major, minor, PA): 0.051, 0.037, 77° remarks: * orbital elements for (1389) Onnie : Mean anomaly = 181.96189301 deg Arg. of pericenter = 310.44857274 deg Long. of node = 174.71728429 deg Inclination = 2.04293026 deg Eccentricity = 0.01401381 Semimajor axis = 2.86527249 AU Perihelion dist = 2.82511910 AU Mag: H = 11.44, G = 0.15 Epoch of elements : MJD 54313.56500000 TDT (2007 Aug 01.565) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Aug 01 1389 Onnie 13h 34.1m UT 10.4 20 31 43.685-16 29 17.18TYC 6329-01581-1 10.9 15.5 28 2.3 1.892 -2.092 -8.86 154.631 -16.485 -21.93 18.02 13.5679 -.11696 .39698 -6.47204 -1.90585 0.00029 -0.00016 2000 181.2374322007 729.00000310.448573174.717284 2.0429300.014013812.865272492.8251191011.65 0.15 RATE 2.0321470 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.054 0.041 78.6 3.080 0.042 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jul 08, 16:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org