IOTA/IOTA-ES occultation update for (150) Nuwa / UCAC2 23947915 event on 2008 Jul 03, 01:36 UT Visible from Africa, Venezuela, Colombia, Central America Summary ------- On 2008 Jul 03 UT, the 151 km diameter asteroid (150) Nuwa will occult a 11.5 mag star in the constellation Sagittarius for observers along a path across Africa, Venezuela, Colombia, Central America. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.1 mag to 12.1 mag (the magnitude of the asteroid) for at most 13.2 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 60 * date and approx. time of event: 2008 Jul 03, 01:28 - 2008 Jul 03, 01:44 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 1.1 * estimated maximum duration [s]: 13.2 * Moon: 0 % sunlit, 171° distance * Sun: 173° distance * rough path description: Africa, Venezuela, Colombia, Central America The occultation path -------------------- * approximate projected width [km]: 166 * 1 sigma uncertainty interval [path widths]: +/- 1.02 * 1 sigma uncertainty interval [seconds]: +/- 12.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .115 +/- .115) * 1 sigma uncertainty ellipse (major, minor, PA): ( .115", .115", 90° ) * approx speed of asteroid's shadow [km/s]: 11.4629 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 23947915 by 150 Nuwa on 2008 Jul 3 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 -106 0 0 18 30 53 1 44 56 8 114 -1 19 19 21 17 42 44 20 59 21 16 5 30 -105 0 0 18 9 21 1 44 55 9 115 -2 18 57 46 17 21 16 20 37 39 15 44 7 -104 0 0 17 47 58 1 44 53 10 115 -3 18 36 20 16 59 55 20 16 6 15 22 54 -103 0 0 17 26 43 1 44 51 11 115 -4 18 15 2 16 38 44 19 54 41 15 1 49 -102 0 0 17 5 38 1 44 49 12 116 -5 17 53 54 16 17 43 19 33 26 14 40 54 -101 0 0 16 44 43 1 44 46 13 116 -6 17 32 55 15 56 51 19 12 20 14 20 9 -100 0 0 16 23 59 1 44 44 14 116 -7 17 12 7 15 36 10 18 51 24 13 59 35 - 99 0 0 16 3 25 1 44 41 15 117 -8 16 51 29 15 15 40 18 30 39 13 39 12 - 98 0 0 15 43 2 1 44 38 16 117 -9 16 31 3 14 55 21 18 10 5 13 19 0 - 97 0 0 15 22 51 1 44 35 17 117 -10 16 10 48 14 35 13 17 49 42 12 59 0 - 96 0 0 15 2 53 1 44 32 18 118 -11 15 50 46 14 15 18 17 29 31 12 39 12 - 95 0 0 14 43 6 1 44 29 19 118 -12 15 30 56 13 55 36 17 9 33 12 19 37 - 94 0 0 14 23 33 1 44 25 20 118 -13 15 11 19 13 36 7 16 49 48 12 0 16 - 93 0 0 14 4 13 1 44 21 21 118 -14 14 51 55 13 16 51 16 30 16 11 41 7 - 92 0 0 13 45 7 1 44 17 22 119 -15 14 32 45 12 57 49 16 10 57 11 22 13 - 91 0 0 13 26 15 1 44 13 23 119 -16 14 13 49 12 39 1 15 51 53 11 3 33 - 90 0 0 13 7 38 1 44 9 24 119 -17 13 55 7 12 20 27 15 33 3 10 45 7 - 89 0 0 12 49 15 1 44 4 25 120 -18 13 36 41 12 2 8 15 14 28 10 26 56 - 88 0 0 12 31 8 1 44 0 26 120 -19 13 18 29 11 44 5 14 56 8 10 9 1 - 87 0 0 12 13 16 1 43 55 27 120 -20 13 0 33 11 26 17 14 38 3 9 51 20 - 86 0 0 11 55 40 1 43 50 28 121 -21 12 42 53 11 8 45 14 20 15 9 33 56 - 85 0 0 11 38 20 1 43 45 29 121 -22 12 25 29 10 51 29 14 2 42 9 16 48 - 84 0 0 11 21 16 1 43 40 30 121 -23 12 8 22 10 34 29 13 45 26 8 59 57 - 83 0 0 11 4 30 1 43 34 31 122 -24 11 51 31 10 17 47 13 28 27 8 43 22 - 82 0 0 10 48 0 1 43 29 32 122 -25 11 34 57 10 1 21 13 11 44 8 27 4 - 81 0 0 10 31 48 1 43 23 33 122 -26 11 18 41 9 45 12 12 55 20 8 11 3 - 80 0 0 10 15 53 1 43 17 34 123 -27 11 2 42 9 29 21 12 39 12 7 55 20 - 79 0 0 10 0 16 1 43 12 35 123 -28 10 47 1 9 13 48 12 23 23 7 39 54 - 78 0 0 9 44 57 1 43 5 36 123 -28 10 31 38 8 58 33 12 7 52 7 24 47 - 77 0 0 9 29 56 1 42 59 37 124 -29 10 16 33 8 43 36 11 52 39 7 9 57 - 76 0 0 9 15 14 1 42 53 37 124 -30 10 1 47 8 28 58 11 37 45 6 55 26 - 75 0 0 9 0 50 1 42 46 38 125 -31 9 47 20 8 14 38 11 23 10 6 41 14 - 74 0 0 8 46 46 1 42 40 39 125 -32 9 33 12 8 0 37 11 8 53 6 27 20 - 73 0 0 8 33 0 1 42 33 40 126 -33 9 19 23 7 46 55 10 54 57 6 13 45 - 72 0 0 8 19 34 1 42 26 41 126 -34 9 5 53 7 33 32 10 41 19 6 0 30 - 71 0 0 8 6 27 1 42 19 42 127 -35 8 52 42 7 20 29 10 28 1 5 47 33 - 70 0 0 7 53 40 1 42 12 43 127 -36 8 39 52 7 7 46 10 15 3 5 34 56 - 69 0 0 7 41 13 1 42 5 44 128 -37 8 27 21 6 55 22 10 2 25 5 22 39 - 68 0 0 7 29 6 1 41 58 45 128 -38 8 15 11 6 43 18 9 50 8 5 10 42 - 67 0 0 7 17 18 1 41 50 46 129 -39 8 3 20 6 31 34 9 38 10 4 59 4 - 66 0 0 7 5 52 1 41 43 46 129 -39 7 51 50 6 20 10 9 26 33 4 47 47 - 65 0 0 6 54 45 1 41 35 47 130 -40 7 40 40 6 9 7 9 15 17 4 36 49 - 64 0 0 6 43 59 1 41 27 48 131 -41 7 29 51 5 58 24 9 4 21 4 26 12 - 63 0 0 6 33 34 1 41 20 49 131 -42 7 19 23 5 48 1 8 53 47 4 15 56 - 62 0 0 6 23 29 1 41 12 50 132 -43 7 9 15 5 37 59 8 43 33 4 6 0 - 61 0 0 6 13 45 1 41 4 51 133 -44 6 59 29 5 28 19 8 33 41 3 56 24 - 60 0 0 6 4 23 1 40 56 51 133 -45 6 50 3 5 18 58 8 24 10 3 47 9 - 59 0 0 5 55 21 1 40 48 52 134 -45 6 40 59 5 9 59 8 15 0 3 38 15 - 58 0 0 5 46 40 1 40 39 53 135 -46 6 32 16 5 1 21 8 6 11 3 29 42 - 57 0 0 5 38 21 1 40 31 54 136 -47 6 23 54 4 53 4 7 57 44 3 21 30 - 56 0 0 5 30 23 1 40 23 55 137 -48 6 15 54 4 45 9 7 49 39 3 13 39 - 55 0 0 5 22 47 1 40 14 55 138 -49 6 8 15 4 37 35 7 41 55 3 6 9 - 54 0 0 5 15 32 1 40 6 56 139 -49 6 0 58 4 30 22 7 34 34 2 59 1 - 53 0 0 5 8 38 1 39 57 57 140 -50 5 54 2 4 23 30 7 27 34 2 52 13 - 52 0 0 5 2 6 1 39 48 57 141 -51 5 47 29 4 17 0 7 20 56 2 45 47 - 51 0 0 4 55 56 1 39 40 58 142 -52 5 41 16 4 10 52 7 14 40 2 39 42 - 50 0 0 4 50 7 1 39 31 59 144 -52 5 35 26 4 5 5 7 8 46 2 33 59 - 49 0 0 4 44 41 1 39 22 59 145 -53 5 29 58 3 59 40 7 3 14 2 28 37 - 48 0 0 4 39 36 1 39 13 60 146 -54 5 24 51 3 54 36 6 58 4 2 23 36 - 47 0 0 4 34 53 1 39 4 61 148 -54 5 20 7 3 49 55 6 53 16 2 18 57 - 46 0 0 4 30 31 1 38 55 61 149 -55 5 15 44 3 45 35 6 48 51 2 14 40 - 45 0 0 4 26 32 1 38 46 62 151 -56 5 11 44 3 41 37 6 44 48 2 10 44 - 44 0 0 4 22 55 1 38 37 62 152 -56 5 8 5 3 38 0 6 41 7 2 7 10 - 43 0 0 4 19 39 1 38 28 63 154 -57 5 4 49 3 34 46 6 37 49 2 3 58 - 42 0 0 4 16 46 1 38 19 63 156 -57 5 1 54 3 31 53 6 34 52 2 1 7 - 41 0 0 4 14 15 1 38 10 64 157 -58 4 59 22 3 29 23 6 32 19 1 58 38 - 40 0 0 4 12 5 1 38 1 64 159 -58 4 57 12 3 27 14 6 30 7 1 56 31 - 39 0 0 4 10 18 1 37 52 64 161 -59 4 55 25 3 25 28 6 28 18 1 54 45 - 38 0 0 4 8 53 1 37 43 65 163 -59 4 53 59 3 24 3 6 26 52 1 53 21 - 37 0 0 4 7 50 1 37 33 65 165 -60 4 52 56 3 23 0 6 25 48 1 52 19 - 36 0 0 4 7 9 1 37 24 65 167 -60 4 52 14 3 22 19 6 25 6 1 51 39 - 35 0 0 4 6 50 1 37 15 65 169 -61 4 51 55 3 22 1 6 24 47 1 51 21 - 34 0 0 4 6 53 1 37 5 65 171 -61 4 51 59 3 22 4 6 24 50 1 51 24 - 33 0 0 4 7 19 1 36 56 66 174 -61 4 52 24 3 22 29 6 25 16 1 51 49 - 32 0 0 4 8 6 1 36 47 66 176 -62 4 53 12 3 23 16 6 26 4 1 52 35 - 31 0 0 4 9 15 1 36 38 66 178 -62 4 54 21 3 24 25 6 27 14 1 53 44 - 30 0 0 4 10 47 1 36 28 66 180 -62 4 55 53 3 25 56 6 28 47 1 55 14 - 29 0 0 4 12 40 1 36 19 66 182 -62 4 57 47 3 27 49 6 30 42 1 57 6 - 28 0 0 4 14 56 1 36 10 66 185 -62 5 0 4 3 30 4 6 33 0 1 59 19 - 27 0 0 4 17 33 1 36 0 65 187 -63 5 2 42 3 32 41 6 35 40 2 1 55 - 26 0 0 4 20 33 1 35 51 65 189 -63 5 5 42 3 35 40 6 38 42 2 4 52 - 25 0 0 4 23 54 1 35 42 65 191 -63 5 9 5 3 39 0 6 42 6 2 8 10 - 24 0 0 4 27 38 1 35 32 65 193 -63 5 12 49 3 42 42 6 45 53 2 11 50 - 23 0 0 4 31 43 1 35 23 64 195 -63 5 16 56 3 46 46 6 50 2 2 15 52 - 22 0 0 4 36 10 1 35 14 64 197 -62 5 21 24 3 51 12 6 54 33 2 20 15 - 21 0 0 4 40 59 1 35 5 64 199 -62 5 26 14 3 56 0 6 59 27 2 25 0 - 20 0 0 4 46 10 1 34 56 63 201 -62 5 31 26 4 1 9 7 4 42 2 30 6 - 19 0 0 4 51 42 1 34 46 63 202 -62 5 37 0 4 6 39 7 10 20 2 35 34 - 18 0 0 4 57 36 1 34 37 62 204 -62 5 42 56 4 12 32 7 16 19 2 41 22 - 17 0 0 5 3 51 1 34 28 62 206 -62 5 49 13 4 18 45 7 22 40 2 47 33 - 16 0 0 5 10 28 1 34 19 61 207 -61 5 55 53 4 25 21 7 29 23 2 54 4 - 15 0 0 5 17 27 1 34 10 61 209 -61 6 2 53 4 32 17 7 36 28 3 0 57 - 14 0 0 5 24 47 1 34 1 60 210 -61 6 10 15 4 39 35 7 43 55 3 8 10 - 13 0 0 5 32 28 1 33 52 60 212 -60 6 17 59 4 47 14 7 51 43 3 15 45 - 12 0 0 5 40 31 1 33 43 59 213 -60 6 26 4 4 55 14 7 59 53 3 23 41 - 11 0 0 5 48 54 1 33 35 58 214 -59 6 34 30 5 3 36 8 8 24 3 31 57 - 10 0 0 5 57 39 1 33 26 58 216 -59 6 43 17 5 12 18 8 17 17 3 40 35 - 9 0 0 6 6 45 1 33 17 57 217 -58 6 52 25 5 21 21 8 26 31 3 49 33 - 8 0 0 6 16 12 1 33 9 56 218 -58 7 1 55 5 30 45 8 36 6 3 58 51 - 7 0 0 6 25 59 1 33 0 56 219 -57 7 11 45 5 40 30 8 46 2 4 8 31 - 6 0 0 6 36 7 1 32 51 55 220 -57 7 21 56 5 50 35 8 56 19 4 18 30 - 5 0 0 6 46 36 1 32 43 54 221 -56 7 32 27 6 1 1 9 6 56 4 28 50 - 4 0 0 6 57 25 1 32 35 53 222 -55 7 43 19 6 11 47 9 17 55 4 39 31 - 3 0 0 7 8 34 1 32 26 53 223 -55 7 54 32 6 22 53 9 29 14 4 50 31 - 2 0 0 7 20 4 1 32 18 52 224 -54 8 6 5 6 34 19 9 40 53 5 1 51 - 1 0 0 7 31 53 1 32 10 51 224 -53 8 17 57 6 46 6 9 52 53 5 13 31 0 0 0 7 44 3 1 32 2 50 225 -53 8 30 10 6 58 12 10 5 13 5 25 31 1 0 0 7 56 32 1 31 54 49 226 -52 8 42 43 7 10 38 10 17 53 5 37 50 2 0 0 8 9 21 1 31 46 48 227 -51 8 55 35 7 23 23 10 30 52 5 50 29 3 0 0 8 22 29 1 31 38 48 227 -50 9 8 47 7 36 28 10 44 11 6 3 27 4 0 0 8 35 56 1 31 31 47 228 -50 9 22 18 7 49 52 10 57 50 6 16 44 5 0 0 8 49 42 1 31 23 46 229 -49 9 36 8 8 3 35 11 11 47 6 30 19 6 0 0 9 3 48 1 31 16 45 229 -48 9 50 17 8 17 36 11 26 4 6 44 14 7 0 0 9 18 12 1 31 8 44 230 -47 10 4 44 8 31 57 11 40 40 6 58 27 8 0 0 9 32 54 1 31 1 43 230 -46 10 19 31 8 46 35 11 55 34 7 12 58 9 0 0 9 47 55 1 30 54 42 231 -46 10 34 35 9 1 32 12 10 46 7 27 48 10 0 0 10 3 13 1 30 47 41 232 -45 10 49 58 9 16 47 12 26 17 7 42 55 11 0 0 10 18 50 1 30 40 41 232 -44 11 5 38 9 32 20 12 42 5 7 58 20 12 0 0 10 34 44 1 30 33 40 233 -43 11 21 36 9 48 10 12 58 12 8 14 3 13 0 0 10 50 55 1 30 26 39 233 -42 11 37 51 10 4 17 13 14 35 8 30 3 14 0 0 11 7 23 1 30 20 38 233 -41 11 54 23 10 20 42 13 31 16 8 46 19 15 0 0 11 24 8 1 30 13 37 234 -40 12 11 12 10 37 23 13 48 13 9 2 53 16 0 0 11 41 10 1 30 7 36 234 -40 12 28 17 10 54 20 14 5 27 9 19 42 17 0 0 11 58 27 1 30 1 35 235 -39 12 45 39 11 11 34 14 22 57 9 36 48 18 0 0 12 16 1 1 29 55 34 235 -38 13 3 17 11 29 4 14 40 43 9 54 10 19 0 0 12 33 50 1 29 49 33 236 -37 13 21 10 11 46 49 14 58 45 10 11 48 20 0 0 12 51 54 1 29 43 32 236 -36 13 39 18 12 4 49 15 17 1 10 29 40 21 0 0 13 10 14 1 29 38 31 236 -35 13 57 41 12 23 5 15 35 33 10 47 48 22 0 0 13 28 47 1 29 32 30 237 -34 14 16 19 12 41 34 15 54 19 11 6 10 23 0 0 13 47 35 1 29 27 29 237 -33 14 35 11 13 0 19 16 13 20 11 24 47 24 0 0 14 6 37 1 29 22 28 238 -32 14 54 17 13 19 17 16 32 34 11 43 37 25 0 0 14 25 53 1 29 17 27 238 -31 15 13 36 13 38 28 16 52 1 12 2 41 26 0 0 14 45 21 1 29 12 26 238 -30 15 33 9 13 57 53 17 11 42 12 21 59 27 0 0 15 5 3 1 29 7 25 239 -29 15 52 54 14 17 31 17 31 35 12 41 29 28 0 0 15 24 56 1 29 3 24 239 -29 16 12 51 14 37 21 17 51 40 13 1 11 29 0 0 15 45 2 1 28 59 23 239 -28 16 33 1 14 57 23 18 11 57 13 21 6 30 0 0 16 5 19 1 28 55 22 240 -27 16 53 21 15 17 36 18 32 26 13 41 12 31 0 0 16 25 47 1 28 51 21 240 -26 17 13 53 15 38 1 18 53 5 14 1 30 32 0 0 16 46 26 1 28 47 20 240 -25 17 34 35 15 58 36 19 13 55 14 21 58 33 0 0 17 7 15 1 28 43 19 241 -24 17 55 28 16 19 21 19 34 54 14 42 37 34 0 0 17 28 13 1 28 40 18 241 -23 18 16 30 16 40 17 19 56 4 15 3 26 35 0 0 17 49 21 1 28 36 17 241 -22 18 37 41 17 1 21 20 17 22 15 24 24 36 0 0 18 10 38 1 28 33 16 242 -21 18 59 1 17 22 35 20 38 48 15 45 31 37 0 0 18 32 3 1 28 30 15 242 -20 19 20 29 17 43 57 21 0 23 16 6 47 38 0 0 18 53 35 1 28 28 14 242 -19 19 42 4 18 5 26 21 22 5 16 28 11 39 0 0 19 15 15 1 28 25 13 243 -18 20 3 47 18 27 4 21 43 54 16 49 43 40 0 0 19 37 2 1 28 23 12 243 -17 20 25 37 18 48 48 22 5 50 17 11 21 41 0 0 19 58 55 1 28 20 11 243 -16 20 47 33 19 10 38 22 27 51 17 33 7 42 0 0 20 20 54 1 28 18 10 244 -15 21 9 34 19 32 35 22 49 58 17 54 58 43 0 0 20 42 58 1 28 17 9 244 -14 21 31 41 19 54 36 23 12 10 18 16 55 44 0 0 21 5 7 1 28 15 8 245 -13 21 53 52 20 16 43 23 34 26 18 38 57 45 0 0 21 27 20 1 28 13 7 245 -12 22 16 7 20 38 54 23 56 45 19 1 4 46 0 0 21 49 37 1 28 12 6 245 -11 22 38 26 21 1 8 24 19 8 19 23 14 47 0 0 22 11 56 1 28 11 5 246 -10 23 0 47 21 23 26 24 41 34 19 45 28 48 0 0 22 34 19 1 28 10 4 246 -9 23 23 11 21 45 47 25 4 1 20 7 45 49 0 0 22 56 43 1 28 9 3 246 -8 23 45 37 22 8 9 25 26 31 20 30 5 50 0 0 23 19 8 1 28 9 3 247 -7 24 8 4 22 30 33 25 49 1 .. .. .. 51 0 0 23 41 35 1 28 9 2 247 -6 24 30 32 22 52 59 26 11 31 .. .. .. 52 0 0 24 4 2 1 28 8 1 248 -5 24 53 0 23 15 24 .. .. .. .. .. .. Uncertainty in time = +/- 14 secs [Prediction of 2008 Jun 26.0] Data for the target star ------------------------ * name: UCAC2 23947915 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 21 22.3455 DE: -20 08 58.998 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .114, .114 ) * V mag [mag]: 11.5 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (150) Nuwa approx. diameter [km]: 151 approx. diameter ["]: .112 distance from Earth [AU]: 1.86000 * orbital information: orbit source: Preston date of fit: 2008 Jun 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 952 number of rejected observations: 146 time covered by the observations: 1906 Oct 11 - 2008 Jun 25 1 sigma uncertainty ellipse (major, minor, PA): 0.019, 0.013, 87° remarks: * orbital elements for (150) Nuwa : Mean anomaly = 293.99600784 deg Arg. of pericenter = 151.22320619 deg Long. of node = 206.41715972 deg Inclination = 2.19153162 deg Eccentricity = 0.12940524 Semimajor axis = 2.98406520 AU Perihelion dist = 2.59791154 AU Mag: H = 8.31, G = 0.15 Epoch of elements : MJD 54650.06700000 TDT (2008 Jul 03.067) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jul 3 150 Nuwa 1h 36.6m UT 11.5 18 21 22.346-20 8 59.00UCAC2 23947915 0.0 12.1 151 13.2 1.860 -2.171 -0.80 -30.2612 -20.149 156.91 22.94 1.6098 -0.01096 0.41115 -6.46773 -0.17015 0.00063 -0.00029 2000 292.0711812008 623.00000151.223206206.417160 2.1915320.12940524 2.9840652 2.5979115 8.2 5.00.15 RATE 1.9120160 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.115 0.115 90 2.02 0.115 0 54643.5020080703_947915 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jun 26, 00:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org