IOTA/IOTA-ES occultation update for (737) Arequipa / TYC 0071-00986-1 event on 2012 Oct 21, 10:40 UT Visible from USA, Mexico, New Zealand Summary ------- On 2012 Oct 21 UT, the 45 km diameter asteroid (737) Arequipa will occult a 12.2 mag star in the constellation Taurus for observers along a path across USA, Mexico, New Zealand. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.8 mag to 12.3 mag (the magnitude of the asteroid) for at most 4.5 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. The event at a glimpse ---------------------- * Rank: 56 * date and approx. time of event: 2012 Oct 21, 10:31 - 2012 Oct 21, 10:51 UT * geocentric midpoint of event [JD]: 2456221.9453375 * magnitude of target star: 12.2 * magnitude drop [mag]: 0.8 * estimated maximum duration [s]: 4.5 * Moon: 43 % sunlit, 126° distance * Sun: 150° distance * rough path description: USA, Mexico, New Zealand The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 1.13 * 1 sigma uncertainty interval [seconds]: +/- 5.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .049) * 1 sigma uncertainty ellipse (major, minor, PA): ( .049", .045", 359° ) * approx speed of asteroid's shadow [km/s]: 10.1194 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0071-00986-1 by 737 Arequipa on 2012 Oct 21 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 ' " Longitude Longitude Longitude Longitude 143 52 59 -44 0 0 10 51 45 3 78 -19 142 27 29 145 12 18 ... .. .. 147 54 35 149 31 47 -43 0 0 10 51 41 7 74 -23 148 28 20 150 32 39 145 53 13 152 42 14 Latitude Latitude Latitude Latitude 150 0 0 -42 54 12 10 51 40 7 74 -23 -42 41 33 -43 6 51 -42 12 59 -43 35 26 151 0 0 -42 41 27 10 51 39 8 73 -24 -42 28 46 -42 54 8 -42 0 6 -43 22 49 152 0 0 -42 28 7 10 51 38 9 73 -25 -42 15 23 -42 40 51 -41 46 38 -43 9 38 153 0 0 -42 14 12 10 51 37 10 72 -25 -42 1 26 -42 26 59 -41 32 34 -42 55 52 154 0 0 -41 59 43 10 51 35 10 71 -26 -41 46 53 -42 12 32 -41 17 56 -42 41 31 155 0 0 -41 44 37 10 51 34 11 71 -27 -41 31 45 -41 57 29 -41 2 41 -42 26 35 156 0 0 -41 28 56 10 51 32 12 70 -27 -41 16 1 -41 41 51 -40 46 50 -42 11 3 157 0 0 -41 12 38 10 51 30 13 69 -28 -40 59 40 -41 25 36 -40 30 22 -41 54 55 158 0 0 -40 55 43 10 51 28 14 69 -29 -40 42 42 -41 8 44 -40 13 17 -41 38 10 159 0 0 -40 38 11 10 51 26 14 68 -30 -40 25 7 -40 51 16 -39 55 35 -41 20 49 160 0 0 -40 20 2 10 51 24 15 67 -30 -40 6 54 -40 33 9 -39 37 15 -41 2 50 161 0 0 -40 1 14 10 51 21 16 67 -31 -39 48 4 -40 14 25 -39 18 17 -40 44 14 162 0 0 -39 41 49 10 51 19 17 66 -32 -39 28 34 -39 55 3 -38 58 40 -40 24 59 163 0 0 -39 21 44 10 51 16 18 65 -32 -39 8 26 -39 35 2 -38 38 24 -40 5 6 164 0 0 -39 1 0 10 51 13 18 65 -33 -38 47 39 -39 14 21 -38 17 28 -39 44 33 165 0 0 -38 39 36 10 51 10 19 64 -34 -38 26 11 -38 53 1 -37 55 53 -39 23 22 166 0 0 -38 17 33 10 51 7 20 64 -35 -38 4 4 -38 31 1 -37 33 37 -39 1 30 167 0 0 -37 54 48 10 51 3 21 63 -35 -37 41 16 -38 8 21 -37 10 40 -38 38 58 168 0 0 -37 31 23 10 51 0 22 62 -36 -37 17 47 -37 45 0 -36 47 2 -38 15 46 169 0 0 -37 7 17 10 50 56 23 62 -37 -36 53 36 -37 20 57 -36 22 43 -37 51 52 170 0 0 -36 42 28 10 50 52 24 61 -38 -36 28 44 -36 56 13 -35 57 42 -37 27 17 171 0 0 -36 16 58 10 50 48 25 61 -38 -36 3 10 -36 30 46 -35 31 58 -37 2 0 172 0 0 -35 50 45 10 50 44 25 60 -39 -35 36 53 -36 4 38 -35 5 32 -36 36 0 173 0 0 -35 23 49 10 50 40 26 59 -40 -35 9 53 -35 37 46 -34 38 23 -36 9 18 174 0 0 -34 56 10 10 50 35 27 59 -41 -34 42 9 -35 10 11 -34 10 30 -35 41 52 175 0 0 -34 27 48 10 50 30 28 58 -41 -34 13 43 -34 41 53 -33 41 54 -35 13 44 176 0 0 -33 58 41 10 50 25 29 58 -42 -33 44 32 -34 12 51 -33 12 34 -34 44 51 177 0 0 -33 28 51 10 50 20 30 57 -43 -33 14 37 -33 43 4 -32 42 29 -34 15 15 178 0 0 -32 58 16 10 50 15 31 57 -44 -32 43 58 -33 12 34 -32 11 41 -33 44 54 179 0 0 -32 26 57 10 50 9 32 56 -45 -32 12 35 -32 41 19 -31 40 7 -33 13 49 180 0 0 -31 54 53 10 50 3 33 55 -45 -31 40 26 -32 9 19 -31 7 49 -32 41 59 -179 0 0 -31 22 4 10 49 57 34 55 -46 -31 7 33 -31 36 35 -30 34 46 -32 9 24 -178 0 0 -30 48 30 10 49 51 35 54 -47 -30 33 55 -31 3 5 -30 0 58 -31 36 4 -177 0 0 -30 14 11 10 49 45 36 54 -48 -29 59 31 -30 28 50 -29 26 25 -31 1 59 -176 0 0 -29 39 7 10 49 38 37 53 -48 -29 24 23 -29 53 50 -28 51 7 -30 27 9 -175 0 0 -29 3 17 10 49 31 38 53 -49 -28 48 29 -29 18 6 -28 15 4 -29 51 34 -174 0 0 -28 26 43 10 49 24 39 52 -50 -28 11 51 -28 41 36 -27 38 16 -29 15 14 -173 0 0 -27 49 25 10 49 16 40 52 -51 -27 34 28 -28 4 21 -27 0 43 -28 38 9 -172 0 0 -27 11 21 10 49 9 41 51 -52 -26 56 21 -27 26 22 -26 22 26 -28 0 20 -171 0 0 -26 32 34 10 49 1 42 51 -52 -26 17 29 -26 47 39 -25 43 25 -27 21 45 -170 0 0 -25 53 2 10 48 53 43 51 -53 -25 37 53 -26 8 11 -25 3 40 -26 42 27 -169 0 0 -25 12 47 10 48 44 45 50 -54 -24 57 34 -25 28 0 -24 23 12 -26 2 25 -168 0 0 -24 31 49 10 48 36 46 50 -55 -24 16 32 -24 47 6 -23 42 1 -25 21 40 -167 0 0 -23 50 8 10 48 27 47 49 -55 -23 34 47 -24 5 29 -23 0 7 -24 40 12 -166 0 0 -23 7 45 10 48 18 48 49 -56 -22 52 21 -23 23 10 -22 17 32 -23 58 2 -165 0 0 -22 24 41 10 48 8 49 48 -57 -22 9 13 -22 40 10 -21 34 16 -23 15 10 -164 0 0 -21 40 57 10 47 59 50 48 -57 -21 25 25 -21 56 29 -20 50 20 -22 31 37 -163 0 0 -20 56 33 10 47 49 51 47 -58 -20 40 58 -21 12 9 -20 5 45 -21 47 25 -162 0 0 -20 11 31 10 47 39 53 47 -59 -19 55 52 -20 27 10 -19 20 31 -21 2 33 -161 0 0 -19 25 50 10 47 28 54 47 -59 -19 10 8 -19 41 33 -18 34 41 -20 17 4 -160 0 0 -18 39 34 10 47 18 55 46 -60 -18 23 49 -18 55 19 -17 48 14 -19 30 58 -159 0 0 -17 52 42 10 47 7 56 46 -61 -17 36 54 -18 8 30 -17 1 12 -18 44 16 -158 0 0 -17 5 16 10 46 56 57 45 -61 -16 49 25 -17 21 7 -16 13 37 -17 56 59 -157 0 0 -16 17 18 10 46 45 59 45 -62 -16 1 24 -16 33 12 -15 25 30 -17 9 9 -156 0 0 -15 28 48 10 46 33 60 45 -62 -15 12 51 -15 44 44 -14 36 51 -16 20 48 -155 0 0 -14 39 48 10 46 21 61 44 -62 -14 23 50 -14 55 47 -13 47 44 -15 31 56 -154 0 0 -13 50 21 10 46 9 62 44 -63 -13 34 20 -14 6 22 -12 58 9 -14 42 36 -153 0 0 -13 0 27 10 45 57 63 43 -63 -12 44 24 -13 16 30 -12 8 8 -13 52 49 -152 0 0 -12 10 8 10 45 45 65 43 -63 -11 54 3 -12 26 13 -11 17 43 -13 2 36 -151 0 0 -11 19 26 10 45 32 66 43 -64 -11 3 19 -11 35 33 -10 26 56 -12 12 0 -150 0 0 -10 28 23 10 45 20 67 42 -64 -10 12 15 -10 44 32 - 9 35 48 -11 21 2 -149 0 0 - 9 37 1 10 45 7 68 42 -64 - 9 20 51 - 9 53 11 - 8 44 21 -10 29 44 -148 0 0 - 8 45 22 10 44 54 70 41 -64 - 8 29 11 - 9 1 33 - 7 52 38 - 9 38 9 -147 0 0 - 7 53 27 10 44 41 71 41 -64 - 7 37 15 - 8 9 39 - 7 0 40 - 8 46 17 -146 0 0 - 7 1 19 10 44 27 72 40 -64 - 6 45 7 - 7 17 32 - 6 8 30 - 7 54 12 -145 0 0 - 6 9 0 10 44 14 73 39 -64 - 5 52 47 - 6 25 14 - 5 16 9 - 7 1 55 -144 0 0 - 5 16 33 10 44 0 75 39 -64 - 5 0 19 - 5 32 47 - 4 23 40 - 6 9 29 -143 0 0 - 4 23 58 10 43 47 76 38 -63 - 4 7 44 - 4 40 12 - 3 31 5 - 5 16 55 -142 0 0 - 3 31 19 10 43 33 77 37 -63 - 3 15 5 - 3 47 33 - 2 38 25 - 4 24 15 -141 0 0 - 2 38 37 10 43 19 79 36 -63 - 2 22 23 - 2 54 51 - 1 45 44 - 3 31 33 -140 0 0 - 1 45 55 10 43 5 80 34 -62 - 1 29 42 - 2 2 8 - 0 53 3 - 2 38 49 -139 0 0 - 0 53 14 10 42 51 81 32 -62 - 0 37 2 - 1 9 27 - 0 0 24 - 1 46 7 -138 0 0 - 0 0 38 10 42 37 82 30 -61 0 15 34 - 0 16 50 0 52 10 - 0 53 28 -137 0 0 0 51 52 10 42 23 83 26 -61 1 8 3 0 35 41 1 44 37 - 0 0 55 -136 0 0 1 44 15 10 42 9 85 22 -60 2 0 24 1 28 4 2 36 55 0 51 31 -135 0 0 2 36 26 10 41 55 86 14 -60 2 52 35 2 20 18 3 29 3 1 43 47 -134 0 0 3 28 26 10 41 41 87 2 -59 3 44 33 3 12 18 4 20 58 2 35 51 -133 0 0 4 20 11 10 41 27 87 341 -58 4 36 16 4 4 5 5 12 37 3 27 42 -132 0 0 5 11 39 10 41 14 88 311 -58 5 27 43 4 55 36 6 4 0 4 19 16 -131 0 0 6 2 50 10 41 0 87 284 -57 6 18 51 5 46 48 6 55 4 5 10 33 -130 0 0 6 53 40 10 40 46 86 268 -56 7 9 40 6 37 40 7 45 47 6 1 31 -129 0 0 7 44 8 10 40 32 85 258 -55 8 0 5 7 28 11 8 36 8 6 52 6 -128 0 0 8 34 13 10 40 18 84 252 -55 8 50 8 8 18 18 9 26 5 7 42 19 -127 0 0 9 23 52 10 40 5 83 248 -54 9 39 44 9 8 0 10 15 35 8 32 7 -126 0 0 10 13 4 10 39 51 82 245 -53 10 28 53 9 57 15 11 4 38 9 21 28 -125 0 0 11 1 48 10 39 38 81 243 -52 11 17 34 10 46 1 11 53 13 10 10 21 -124 0 0 11 50 1 10 39 25 79 242 -51 12 5 45 11 34 17 12 41 16 10 58 44 -123 0 0 12 37 43 10 39 11 78 241 -50 12 53 23 12 22 3 13 28 48 11 46 36 -122 0 0 13 24 52 10 38 58 77 240 -49 13 40 29 13 9 15 14 15 47 12 33 56 -121 0 0 14 11 27 10 38 46 76 239 -48 14 27 1 13 55 54 15 2 11 13 20 42 -120 0 0 14 57 27 10 38 33 75 239 -47 15 12 58 14 41 57 15 48 0 14 6 53 -119 0 0 15 42 51 10 38 20 74 239 -47 15 58 18 15 27 24 16 33 12 14 52 29 -118 0 0 16 27 38 10 38 8 72 238 -46 16 43 1 16 12 14 17 17 47 15 37 27 -117 0 0 17 11 46 10 37 56 71 238 -45 17 27 5 16 56 26 18 1 43 16 21 47 -116 0 0 17 55 15 10 37 44 70 238 -44 18 10 30 17 39 59 18 45 0 17 5 28 -115 0 0 18 38 4 10 37 32 69 238 -43 18 53 16 18 22 52 19 27 36 17 48 30 -114 0 0 19 20 12 10 37 20 68 238 -42 19 35 20 19 5 4 20 9 32 18 30 51 -113 0 0 20 1 39 10 37 9 67 238 -41 20 16 43 19 46 35 20 50 46 19 12 31 -112 0 0 20 42 25 10 36 58 66 238 -40 20 57 25 20 27 25 21 31 18 19 53 30 -111 0 0 21 22 28 10 36 47 64 238 -39 21 37 24 21 7 32 22 11 8 20 33 46 -110 0 0 22 1 48 10 36 36 63 239 -38 22 16 40 21 46 56 22 50 15 21 13 20 -109 0 0 22 40 25 10 36 25 62 239 -37 22 55 13 22 25 37 23 28 39 21 52 10 -108 0 0 23 18 19 10 36 14 61 239 -36 23 33 2 23 3 35 24 6 19 22 30 17 -107 0 0 23 55 28 10 36 4 60 239 -35 24 10 8 23 40 49 24 43 15 23 7 41 -106 0 0 24 31 54 10 35 54 59 239 -35 24 46 30 24 17 19 25 19 27 23 44 20 -105 0 0 25 7 36 10 35 44 58 240 -34 25 22 7 24 53 5 25 54 56 24 20 16 -104 0 0 25 42 34 10 35 35 57 240 -33 25 57 1 25 28 7 26 29 40 24 55 27 -103 0 0 26 16 47 10 35 25 56 240 -32 26 31 10 26 2 24 27 3 39 25 29 54 -102 0 0 26 50 16 10 35 16 55 241 -31 27 4 35 26 35 58 27 36 55 26 3 37 -101 0 0 27 23 1 10 35 7 54 241 -30 27 37 16 27 8 47 28 9 26 26 36 35 -100 0 0 27 55 2 10 34 58 53 241 -29 28 9 12 27 40 52 28 41 14 27 8 49 - 99 0 0 28 26 19 10 34 49 52 242 -28 28 40 25 28 12 13 29 12 17 27 40 19 - 98 0 0 28 56 52 10 34 41 51 242 -27 29 10 54 28 42 50 29 42 37 28 11 6 - 97 0 0 29 26 41 10 34 32 50 243 -27 29 40 39 29 12 43 30 12 13 28 41 8 - 96 0 0 29 55 47 10 34 24 49 243 -26 30 9 41 29 41 52 30 41 5 29 10 27 - 95 0 0 30 24 9 10 34 16 48 244 -25 30 37 59 30 10 19 31 9 15 29 39 2 - 94 0 0 30 51 48 10 34 9 47 244 -24 31 5 34 30 38 2 31 36 41 30 6 54 - 93 0 0 31 18 45 10 34 1 46 244 -23 31 32 27 31 5 2 32 3 25 30 34 3 - 92 0 0 31 44 59 10 33 54 45 245 -22 31 58 37 31 31 20 32 29 27 31 0 30 - 91 0 0 32 10 31 10 33 47 44 245 -22 32 24 5 31 56 56 32 54 46 31 26 14 - 90 0 0 32 35 21 10 33 40 43 246 -21 32 48 52 32 21 49 33 19 24 31 51 16 - 89 0 0 32 59 29 10 33 33 42 246 -20 33 12 56 32 46 1 33 43 21 32 15 36 - 88 0 0 33 22 56 10 33 26 42 247 -19 33 36 20 33 9 32 34 6 36 32 39 15 - 87 0 0 33 45 43 10 33 20 41 247 -18 33 59 3 33 32 22 34 29 11 33 2 13 - 86 0 0 34 7 48 10 33 13 40 248 -17 34 21 5 33 54 31 34 51 6 33 24 30 - 85 0 0 34 29 14 10 33 7 39 248 -17 34 42 28 34 16 0 35 12 21 33 46 6 - 84 0 0 34 50 0 10 33 1 38 249 -16 35 3 10 34 36 50 35 32 56 34 7 3 - 83 0 0 35 10 6 10 32 55 37 249 -15 35 23 13 34 56 59 35 52 52 34 27 20 - 82 0 0 35 29 34 10 32 50 36 250 -14 35 42 38 35 16 30 36 12 9 34 46 58 - 81 0 0 35 48 22 10 32 44 35 251 -14 36 1 23 35 35 22 36 30 47 35 5 56 - 80 0 0 36 6 33 10 32 39 35 251 -13 36 19 30 35 53 35 36 48 48 35 24 16 - 79 0 0 36 24 5 10 32 34 34 252 -12 36 37 0 36 11 10 37 6 11 35 41 58 - 78 0 0 36 41 0 10 32 29 33 252 -11 36 53 52 36 28 8 37 22 56 35 59 2 - 77 0 0 36 57 17 10 32 24 32 253 -11 37 10 6 36 44 28 37 39 5 36 15 28 - 76 0 0 37 12 58 10 32 19 31 253 -10 37 25 44 37 0 11 37 54 36 36 31 18 - 75 0 0 37 28 1 10 32 14 30 254 -9 37 40 45 37 15 17 38 9 32 36 46 30 - 74 0 0 37 42 29 10 32 10 30 255 -8 37 55 10 37 29 47 38 23 51 37 1 5 - 73 0 0 37 56 20 10 32 6 29 255 -8 38 9 0 37 43 41 38 37 35 37 15 5 - 72 0 0 38 9 36 10 32 1 28 256 -7 38 22 13 37 56 59 38 50 43 37 28 28 - 71 0 0 38 22 17 10 31 57 27 256 -6 38 34 51 38 9 42 39 3 17 37 41 16 - 70 0 0 38 34 22 10 31 53 26 257 -5 38 46 55 38 21 50 39 15 15 37 53 28 - 69 0 0 38 45 53 10 31 49 26 257 -5 38 58 23 38 33 22 39 26 39 38 5 5 - 68 0 0 38 56 49 10 31 46 25 258 -4 39 9 17 38 44 20 39 37 29 38 16 8 - 67 0 0 39 7 11 10 31 42 24 259 -3 39 19 37 38 54 44 39 47 45 38 26 36 - 66 0 0 39 16 58 10 31 39 23 259 -2 39 29 23 39 4 33 39 57 27 38 36 29 - 65 0 0 39 26 12 10 31 35 22 260 -2 39 38 36 39 13 49 40 6 35 38 45 49 - 64 0 0 39 34 53 10 31 32 22 261 -1 39 47 14 39 22 31 40 15 10 38 54 34 - 63 0 0 39 43 0 10 31 29 21 261 0 39 55 20 39 30 39 40 23 12 39 2 46 Uncertainty in time = +/- 5 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 0071-00986-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 03 46 30.4845 DE: +06 39 00.633 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .034, .047 ) * V mag [mag]: 12.2 * B mag [mag]: 12.8 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (737) Arequipa approx. diameter [km]: 45 approx. diameter ["]: .042 distance from Earth [AU]: 1.49300 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1049 number of rejected observations: 118 time covered by the observations: 1915 May 07 - 2012 Sep 29 1 sigma uncertainty ellipse (major, minor, PA): 0.030, 0.015, 82° remarks: * orbital elements for (737) Arequipa : Mean anomaly = 59.41466681 deg Arg. of pericenter = 133.94798769 deg Long. of node = 184.91904229 deg Inclination = 12.35389527 deg Eccentricity = 0.24199353 Semimajor axis = 2.59287046 AU Perihelion dist = 1.96541258 AU Mag: H = 8.82, G = 0.15 Epoch of elements : MJD 56221.44500000 TDT (2012 Oct 21.445) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 21 737 Arequipa 10h 41.3m UT 12.2 3 46 30.484 6 39 0.63TYC 0071-00986-1 12.8 12.3 45 4.5 1.493 -1.669 -22.67 -133.9781 6.656 15.83 -10.92 10.6881 0.02673 -0.03055 -4.21992 -3.84910 -0.00278 0.00051 2000 59.07355220121020.00000133.947988184.919042 12.3538950.24199353 2.5928705 1.9654126 8.8 5.00.15 RATE 2.3606570 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.049 0.045 359 2.13 0.047 0 0 5 3 056208.0020121021_0986-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 19:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org