IOTA/IOTA-ES occultation update for (892) Seeligeria / TYC 5129-01434-1 event on 2012 Aug 30, 03:58 UT Visible from Canada, USA, Mexico Summary ------- On 2012 Aug 30 UT, the 80 km diameter asteroid (892) Seeligeria will occult a 12.6 mag star in the constellation Aquila for observers along a path across Canada, USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.8 mag to 15.3 mag (the magnitude of the asteroid) for at most 7.0 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: 66 * date and approx. time of event: 2012 Aug 30, 03:49 - 2012 Aug 30, 04:07 UT * geocentric midpoint of event [JD]: 2456169.66578333 * magnitude of target star: 12.6 * magnitude drop [mag]: 2.8 * estimated maximum duration [s]: 7.0 * Moon: 98 % sunlit, 34° distance * Sun: 129° distance * rough path description: Canada, USA, Mexico The occultation path -------------------- * approximate projected width [km]: 80 * 1 sigma uncertainty interval [path widths]: +/- 0.91 * 1 sigma uncertainty interval [seconds]: +/- 5.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .036 +/- .033) * 1 sigma uncertainty ellipse (major, minor, PA): ( .036", .033", 90° ) * approx speed of asteroid's shadow [km/s]: 11.4597 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5129-01434-1 by 892 Seeligeria on 2012 Aug 30 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 - 35 39 57 69 0 0 3 49 32 6 254 -11 - 38 53 32 - 31 43 23 - 43 46 59 ... .. .. - 43 7 54 68 0 0 3 49 36 9 247 -13 - 45 25 51 - 40 36 56 - 49 12 50 - 35 9 42 Latitude Latitude Latitude Latitude - 45 0 0 67 40 49 3 49 37 10 245 -13 68 4 36 67 17 1 68 47 54 66 33 41 - 46 0 0 67 29 47 3 49 38 10 244 -13 67 53 46 67 5 48 68 37 24 66 22 8 - 47 0 0 67 18 12 3 49 39 11 243 -14 67 42 23 66 54 2 68 26 23 66 10 0 - 48 0 0 67 6 3 3 49 40 11 242 -14 67 30 26 66 41 40 68 14 48 65 57 17 - 49 0 0 66 53 19 3 49 41 12 241 -14 67 17 55 66 28 43 68 2 40 65 43 56 - 50 0 0 66 39 58 3 49 41 12 240 -14 67 4 47 66 15 9 67 49 57 65 29 58 - 51 0 0 66 25 59 3 49 42 12 240 -15 66 51 3 66 0 56 67 36 38 65 15 19 - 52 0 0 66 11 21 3 49 43 13 239 -15 66 36 39 65 46 3 67 22 41 64 59 59 - 53 0 0 65 56 2 3 49 44 13 238 -15 66 21 35 65 30 28 67 8 5 64 43 57 - 54 0 0 65 40 0 3 49 46 14 237 -16 66 5 49 65 14 10 66 52 48 64 27 10 - 55 0 0 65 23 14 3 49 47 14 236 -16 65 49 20 64 57 8 66 36 49 64 9 36 - 56 0 0 65 5 41 3 49 48 15 235 -16 65 32 5 64 39 18 66 20 6 63 51 15 - 57 0 0 64 47 21 3 49 49 15 234 -16 65 14 2 64 20 39 66 2 37 63 32 3 - 58 0 0 64 28 10 3 49 51 16 233 -17 64 55 10 64 1 9 65 44 19 63 11 59 - 59 0 0 64 8 7 3 49 52 17 232 -17 64 35 27 63 40 46 65 25 12 62 51 0 - 60 0 0 63 47 9 3 49 54 17 231 -17 64 14 49 63 19 28 65 5 12 62 29 4 - 61 0 0 63 25 13 3 49 55 18 231 -18 63 53 15 62 57 11 64 44 17 62 6 9 - 62 0 0 63 2 18 3 49 57 18 230 -18 63 30 42 62 33 54 64 22 24 61 42 11 - 63 0 0 62 38 20 3 49 59 19 229 -18 63 7 7 62 9 32 63 59 32 61 17 7 - 64 0 0 62 13 16 3 50 1 19 228 -19 62 42 27 61 44 4 63 35 36 60 50 55 - 65 0 0 61 47 2 3 50 3 20 227 -19 62 16 39 61 17 25 63 10 33 60 23 31 - 66 0 0 61 19 37 3 50 5 21 226 -20 61 49 40 60 49 34 62 44 22 59 54 51 - 67 0 0 60 50 55 3 50 8 21 225 -20 61 21 25 60 20 24 62 16 56 59 24 52 - 68 0 0 60 20 53 3 50 10 22 224 -20 60 51 51 59 49 54 61 48 14 58 53 30 - 69 0 0 59 49 26 3 50 13 23 224 -21 60 20 54 59 17 58 61 18 11 58 20 41 - 70 0 0 59 16 31 3 50 16 24 223 -21 59 48 30 58 44 32 60 46 42 57 46 20 - 71 0 0 58 42 2 3 50 19 24 222 -22 59 14 33 58 9 32 60 13 44 57 10 21 - 72 0 0 58 5 56 3 50 22 25 221 -22 58 38 59 57 32 52 59 39 10 56 32 41 - 73 0 0 57 28 5 3 50 25 26 220 -23 58 1 43 56 54 27 59 2 57 55 53 14 - 74 0 0 56 48 25 3 50 29 27 219 -23 57 22 39 56 14 11 58 24 58 55 11 53 - 75 0 0 56 6 50 3 50 33 28 219 -24 56 41 41 55 31 59 57 45 8 54 28 34 - 76 0 0 55 23 13 3 50 37 29 218 -24 55 58 43 54 47 44 57 3 20 53 43 9 - 77 0 0 54 37 28 3 50 42 30 217 -25 55 13 38 54 1 19 56 19 27 52 55 32 - 78 0 0 53 49 28 3 50 47 31 216 -25 54 26 19 53 12 38 55 33 24 52 5 35 - 79 0 0 52 59 5 3 50 52 32 215 -26 53 36 38 52 21 32 54 45 1 51 13 11 - 80 0 0 52 6 11 3 50 57 33 215 -26 52 44 29 51 27 54 53 54 13 50 18 13 - 81 0 0 51 10 39 3 51 3 34 214 -27 51 49 42 50 31 36 53 0 50 49 20 32 - 82 0 0 50 12 19 3 51 9 35 213 -27 50 52 10 49 32 29 52 4 44 48 19 59 - 83 0 0 49 11 3 3 51 16 36 212 -28 49 51 42 48 30 24 51 5 45 47 16 27 - 84 0 0 48 6 42 3 51 23 37 212 -29 48 48 11 47 25 13 50 3 46 46 9 45 - 85 0 0 46 59 6 3 51 31 39 211 -29 47 41 27 46 16 45 48 58 35 44 59 44 - 86 0 0 45 48 5 3 51 39 40 210 -30 46 31 19 45 4 52 47 50 4 43 46 15 - 87 0 0 44 33 31 3 51 48 41 210 -31 45 17 39 43 49 24 46 38 2 42 29 9 - 88 0 0 43 15 12 3 51 58 43 209 -31 44 0 15 42 30 11 45 22 20 41 8 16 - 89 0 0 41 53 1 3 52 8 44 208 -32 42 39 0 41 7 3 44 2 47 39 43 27 - 90 0 0 40 26 46 3 52 19 46 208 -33 41 13 42 39 39 52 42 39 13 38 14 33 - 91 0 0 38 56 20 3 52 31 48 207 -33 39 44 13 38 8 29 41 11 29 36 41 25 - 92 0 0 37 21 34 3 52 44 50 207 -34 38 10 25 36 32 45 39 39 27 35 3 57 - 93 0 0 35 42 21 3 52 57 51 206 -35 36 32 10 34 52 34 38 2 57 33 22 1 - 94 0 0 33 58 35 3 53 12 53 206 -35 34 49 22 33 7 51 36 21 54 31 35 32 - 95 0 0 32 10 11 3 53 27 55 205 -36 33 1 55 31 18 30 34 36 12 29 44 27 - 96 0 0 30 17 7 3 53 44 57 205 -37 31 9 47 29 24 29 32 45 46 27 48 44 - 97 0 0 28 19 20 3 54 1 59 205 -37 29 12 56 27 25 47 30 50 35 25 48 21 - 98 0 0 26 16 54 3 54 20 62 204 -38 27 11 23 25 22 27 28 50 39 23 43 23 - 99 0 0 24 9 52 3 54 39 64 204 -39 25 5 12 23 14 33 26 46 2 21 33 55 -100 0 0 21 58 21 3 55 0 66 204 -39 22 54 30 21 2 13 24 36 49 19 20 4 -101 0 0 19 42 31 3 55 22 69 204 -40 20 39 27 18 45 37 22 23 9 17 2 1 -102 0 0 17 22 37 3 55 44 71 204 -40 18 20 15 16 24 58 20 5 16 14 40 2 -103 0 0 14 58 53 3 56 8 74 205 -40 15 57 12 14 0 35 17 43 23 12 14 24 -104 0 0 12 31 42 3 56 32 76 206 -40 13 30 37 11 32 47 15 17 52 9 45 27 -105 0 0 10 1 26 3 56 57 79 207 -41 11 0 53 9 1 58 12 49 5 7 13 37 -106 0 0 7 28 31 3 57 22 81 209 -41 8 28 26 6 28 35 10 17 26 4 39 20 -107 0 0 4 53 27 3 57 49 84 213 -41 5 53 45 3 53 7 7 43 25 2 3 7 -108 0 0 2 16 45 3 58 15 87 225 -40 3 17 21 1 16 6 5 7 32 - 0 34 32 -109 0 0 - 0 21 1 3 58 42 89 281 -40 0 39 47 - 1 21 55 2 30 20 - 3 13 1 -110 0 0 - 2 59 18 3 59 9 87 349 -40 - 1 58 21 - 4 0 20 - 0 7 36 - 5 51 45 -111 0 0 - 5 37 29 3 59 36 84 3 -39 - 4 36 30 - 6 38 36 - 2 45 41 - 8 30 10 -112 0 0 - 8 15 0 4 0 2 82 8 -38 - 7 14 3 - 9 16 4 - 5 23 20 -11 7 38 -113 0 0 -10 51 14 4 0 28 79 11 -38 - 9 50 25 -11 52 12 - 7 59 59 -13 43 34 -114 0 0 -13 25 39 4 0 54 76 13 -37 -12 25 2 -14 26 24 -10 35 2 -16 17 26 -115 0 0 -15 57 41 4 1 19 74 14 -36 -14 57 23 -16 58 8 -13 7 57 -18 48 39 -116 0 0 -18 26 51 4 1 43 71 15 -35 -17 26 57 -19 26 55 -15 38 15 -21 16 45 -117 0 0 -20 52 42 4 2 7 69 16 -34 -19 53 16 -21 52 18 -18 5 28 -23 41 16 -118 0 0 -23 14 49 4 2 29 66 16 -33 -22 15 56 -24 13 52 -20 29 10 -26 1 50 -119 0 0 -25 32 52 4 2 50 64 17 -32 -24 34 37 -26 31 17 -22 49 0 -28 18 7 -120 0 0 -27 46 34 4 3 11 61 18 -31 -26 49 1 -28 44 16 -25 4 41 -30 29 49 -121 0 0 -29 55 40 4 3 30 59 18 -30 -28 58 54 -30 52 37 -27 15 57 -32 36 46 -122 0 0 -32 0 3 4 3 48 57 19 -29 -31 4 5 -32 56 10 -29 22 37 -34 38 47 -123 0 0 -33 59 34 4 4 5 55 20 -28 -33 4 29 -34 54 48 -31 24 35 -36 35 50 -124 0 0 -35 54 10 4 4 21 53 20 -27 -35 0 0 -36 48 30 -33 21 44 -38 27 50 -125 0 0 -37 43 52 4 4 36 51 21 -26 -36 50 38 -38 37 15 -35 14 4 -40 14 50 -126 0 0 -39 28 40 4 4 50 49 22 -25 -38 36 24 -40 21 5 -37 1 36 -41 56 52 -127 0 0 -41 8 41 4 5 3 47 22 -24 -40 17 24 -42 0 6 -38 44 21 -43 34 3 -128 0 0 -42 43 59 4 5 15 45 23 -23 -41 53 41 -43 34 24 -40 22 27 -45 6 30 -129 0 0 -44 14 42 4 5 27 43 24 -22 -43 25 25 -45 4 7 -41 55 58 -46 34 22 -130 0 0 -45 41 0 4 5 37 42 24 -21 -44 52 42 -46 29 24 -43 25 3 -47 57 48 -131 0 0 -47 3 2 4 5 47 40 25 -20 -46 15 43 -47 50 26 -44 49 52 -49 17 0 -132 0 0 -48 20 57 4 5 56 39 26 -19 -47 34 38 -49 7 22 -46 10 32 -50 32 7 -133 0 0 -49 34 58 4 6 4 37 27 -19 -48 49 37 -50 20 25 -47 27 16 -51 43 22 -134 0 0 -50 45 15 4 6 12 36 27 -18 -50 0 50 -51 29 44 -48 40 12 -52 50 56 -135 0 0 -51 51 58 4 6 19 35 28 -17 -51 8 29 -52 35 31 -49 49 31 -53 55 0 -136 0 0 -52 55 18 4 6 25 34 29 -16 -52 12 43 -53 37 56 -50 55 23 -54 55 45 -137 0 0 -53 55 26 4 6 32 33 30 -16 -53 13 44 -54 37 11 -51 58 0 -55 53 21 -138 0 0 -54 52 31 4 6 37 31 30 -15 -54 11 41 -55 33 25 -52 57 30 -56 48 0 -139 0 0 -55 46 45 4 6 43 30 31 -14 -55 6 44 -56 26 48 -53 54 3 -57 39 51 -140 0 0 -56 38 15 4 6 48 29 32 -14 -55 59 3 -57 17 30 -54 47 49 -58 29 4 -141 0 0 -57 27 11 4 6 52 28 33 -13 -56 48 46 -58 5 39 -55 38 57 -59 15 47 -142 0 0 -58 13 42 4 6 56 27 34 -13 -57 36 3 -58 51 25 -56 27 35 -60 0 10 -143 0 0 -58 57 56 4 7 0 27 35 -12 -58 21 0 -59 34 55 -57 13 51 -60 42 19 -144 0 0 -59 40 0 4 7 4 26 35 -11 -59 3 46 -60 16 16 -57 57 54 -61 22 23 -145 0 0 -60 20 2 4 7 7 25 36 -11 -59 44 28 -60 55 37 -58 39 49 -62 0 30 -146 0 0 -60 58 7 4 7 11 24 37 -10 -60 23 13 -61 33 4 -59 19 45 -62 36 44 -147 0 0 -61 34 24 4 7 14 23 38 -10 -61 0 7 -62 8 43 -59 57 47 -63 11 14 -148 0 0 -62 8 57 4 7 16 23 39 -10 -61 35 17 -62 42 40 -60 34 2 -63 44 5 -149 0 0 -62 41 53 4 7 19 22 40 -9 -62 8 47 -63 15 0 -61 8 36 -64 15 21 -150 0 0 -63 13 16 4 7 21 21 41 -9 -62 40 44 -63 45 50 -61 41 34 -64 45 10 -151 0 0 -63 43 12 4 7 24 20 42 -8 -63 11 12 -64 15 13 -62 13 0 -65 13 34 -152 0 0 -64 11 45 4 7 26 20 42 -8 -63 40 16 -64 43 15 -62 43 0 -65 40 39 -153 0 0 -64 39 0 4 7 28 19 43 -7 -64 8 0 -65 10 0 -63 11 38 -66 6 30 -154 0 0 -65 5 0 4 7 30 19 44 -7 -64 34 29 -65 35 32 -63 38 59 -66 31 9 -155 0 0 -65 29 49 4 7 32 18 45 -7 -64 59 46 -65 59 54 -64 5 6 -66 54 41 -156 0 0 -65 53 32 4 7 33 17 46 -6 -65 23 55 -66 23 10 -64 30 2 -67 17 8 -157 0 0 -66 16 11 4 7 35 17 47 -6 -65 46 59 -66 45 23 -64 53 52 -67 38 35 -158 0 0 -66 37 49 4 7 36 16 48 -6 -66 9 1 -67 6 37 -65 16 39 -67 59 5 -159 0 0 -66 58 29 4 7 38 16 49 -5 -66 30 5 -67 26 54 -65 38 25 -68 18 39 -160 0 0 -67 18 15 4 7 39 15 50 -5 -66 50 13 -67 46 17 -65 59 14 -68 37 21 -161 0 0 -67 37 8 4 7 40 15 51 -5 -67 9 28 -68 4 49 -66 19 7 -68 55 14 -162 0 0 -67 55 11 4 7 41 14 52 -4 -67 27 52 -68 22 31 -66 38 9 -69 12 18 -163 0 0 -68 12 27 4 7 43 14 52 -4 -67 45 27 -68 39 27 -66 56 20 -69 28 38 -164 0 0 -68 28 56 4 7 44 13 53 -4 -68 2 16 -68 55 38 -67 13 43 -69 44 14 -165 0 0 -68 44 43 4 7 45 13 54 -4 -68 18 20 -69 11 6 -67 30 21 -69 59 9 -166 0 0 -68 59 47 4 7 46 12 55 -3 -68 33 42 -69 25 53 -67 46 14 -70 13 24 -167 0 0 -69 14 11 4 7 46 12 56 -3 -68 48 23 -69 40 0 -68 1 26 -70 27 1 -168 0 0 -69 27 57 4 7 47 12 57 -3 -69 2 25 -69 53 30 -68 15 57 -70 40 1 -169 0 0 -69 41 6 4 7 48 11 58 -2 -69 15 49 -70 6 24 -68 29 49 -70 52 27 -170 0 0 -69 53 40 4 7 49 11 59 -2 -69 28 37 -70 18 42 -68 43 4 -71 4 19 -171 0 0 -70 5 39 4 7 50 10 60 -2 -69 40 51 -70 30 28 -68 55 43 -71 15 38 -172 0 0 -70 17 6 4 7 50 10 61 -2 -69 52 31 -70 41 41 -69 7 47 -71 26 27 -173 0 0 -70 28 1 4 7 51 10 62 -1 -70 3 39 -70 52 23 -69 19 19 -71 36 46 -174 0 0 -70 38 25 4 7 51 9 63 -1 -70 14 15 -71 2 35 -69 30 18 -71 46 35 -175 0 0 -70 48 20 4 7 52 9 64 -1 -70 24 22 -71 12 18 -69 40 46 -71 55 57 -176 0 0 -70 57 47 4 7 53 9 65 -1 -70 34 0 -71 21 34 -69 50 44 -72 4 52 -177 0 0 -71 6 46 4 7 53 8 66 -1 -70 43 9 -71 30 22 -70 0 12 -72 13 21 -178 0 0 -71 15 18 4 7 54 8 66 0 -70 51 52 -71 38 44 -70 9 13 -72 21 24 -179 0 0 -71 23 24 4 7 54 7 67 0 -71 0 8 -71 46 41 -70 17 47 -72 29 4 Uncertainty in time = +/- 6 secs Prediction of 2012 Aug 26.0 Data for the target star ------------------------ * name: TYC 5129-01434-1 * constellation : Aquila * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 11 11.3132 DE: -00 05 46.223 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .029, .029 ) * V mag [mag]: 12.6 * B mag [mag]: 12.5 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (892) Seeligeria approx. diameter [km]: 80 approx. diameter ["]: .039 distance from Earth [AU]: 2.81900 * orbital information: orbit source: Preston date of fit: 2012 Aug 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 990 number of rejected observations: 65 time covered by the observations: 1918 May 31 - 2012 Aug 08 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.015, 90° remarks: * orbital elements for (892) Seeligeria : Mean anomaly = 200.37309923 deg Arg. of pericenter = 287.41456503 deg Long. of node = 175.96144913 deg Inclination = 21.31331649 deg Eccentricity = 0.10068845 Semimajor axis = 3.22890662 AU Perihelion dist = 2.90379303 AU Mag: H = 9.51, G = 0.15 Epoch of elements : MJD 56169.16600000 TDT (2012 Aug 30.166) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Aug 30 892 Seeligeria 3h 58.7m UT 12.6 19 11 11.313- 0 5 46.22TYC 5129-01434-1 12.5 15.3 80 7.0 2.819 -0.431 -19.11 -110.6396 -0.091 120.47 8.87 3.9788 0.02455 -0.00771 -2.07768 -6.12540 0.00441 -0.00088 2000 198.8160562012 821.00000287.414565175.961449 21.3133160.10068845 3.2289066 2.9037930 9.5 5.00.15 RATE 1.6987160 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.036 0.033 90 1.91 0.036 0 0 2-3 056165.0020120830_1434-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Aug 25, 22:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org