IOTA/IOTA-ES occultation update for (829) Academia / TYC 2408-01341-1 event on 2012 Oct 10, 20:47 UT Visible from Russia, SW Asia Summary ------- On 2012 Oct 10 UT, the 41 km diameter asteroid (829) Academia will occult a 10.9 mag star in the constellation Auriga for observers along a path across Russia, SW Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.0 mag to 14.9 mag (the magnitude of the asteroid) for at most 5.4 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: 62 * date and approx. time of event: 2012 Oct 10, 20:35 - 2012 Oct 10, 20:55 UT * geocentric midpoint of event [JD]: 2456211.36599167 * magnitude of target star: 10.9 * magnitude drop [mag]: 4.0 * estimated maximum duration [s]: 5.4 * Moon: 25 % sunlit, 55° distance * Sun: 113° distance * rough path description: Russia, SW Asia The occultation path -------------------- * approximate projected width [km]: 48 * 1 sigma uncertainty interval [path widths]: +/- 0.99 * 1 sigma uncertainty interval [seconds]: +/- 5.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .042 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .042", .027", 89° ) * approx speed of asteroid's shadow [km/s]: 7.5834 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2408-01341-1 by 829 Academia on 2012 Oct 10 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 30 33 32 - 6 0 0 20 35 0 1 56 -68 30 56 33 30 10 20 ... .. .. 29 23 50 31 58 9 - 5 0 0 20 35 1 3 56 -70 32 20 27 31 35 40 33 4 7 30 50 40 33 18 58 - 4 0 0 20 35 3 5 56 -72 33 40 39 32 57 8 34 23 8 32 13 26 34 36 23 - 3 0 0 20 35 6 6 56 -73 34 57 30 34 15 7 35 38 57 33 32 35 35 50 43 - 2 0 0 20 35 9 8 56 -75 36 11 21 35 29 57 36 51 51 34 48 28 37 2 15 - 1 0 0 20 35 13 9 56 -77 37 22 27 36 41 57 38 2 6 36 1 23 38 11 14 0 0 0 20 35 18 11 56 -78 38 31 2 37 51 20 39 9 55 37 11 36 39 17 53 1 0 0 20 35 23 12 56 -80 39 37 19 38 58 20 40 15 31 38 19 21 Latitude Latitude Latitude Latitude 40 0 0 1 38 59 20 35 27 13 56 -80 1 21 0 1 57 3 0 45 38 2 33 3 41 0 0 2 35 56 20 35 32 15 56 -82 2 17 41 2 54 15 1 41 49 3 30 48 42 0 0 3 34 35 20 35 39 16 56 -83 3 16 4 3 53 11 2 39 40 4 30 17 43 0 0 4 34 57 20 35 46 18 56 -85 4 16 10 4 53 50 3 39 13 5 31 31 44 0 0 5 37 4 20 35 54 19 56 -86 5 17 59 5 56 15 4 40 29 6 34 31 45 0 0 6 40 56 20 36 2 20 57 -87 6 21 33 7 0 26 5 43 28 7 39 19 46 0 0 7 46 35 20 36 11 22 57 -88 7 26 53 8 6 24 6 48 12 8 45 56 47 0 0 8 54 1 20 36 21 23 57 -88 8 34 0 9 14 9 7 54 41 9 54 22 48 0 0 10 3 15 20 36 32 25 58 -87 9 42 54 10 23 43 9 2 56 11 4 37 49 0 0 11 14 16 20 36 44 26 58 -86 10 53 34 11 35 5 10 12 56 12 16 42 50 0 0 12 27 4 20 36 56 28 58 -84 12 6 1 12 48 15 11 24 42 13 30 36 51 0 0 13 41 39 20 37 9 29 59 -82 13 20 14 14 3 12 12 38 12 14 46 19 52 0 0 14 57 59 20 37 23 31 59 -81 14 36 11 15 19 55 13 53 25 16 3 48 53 0 0 16 16 2 20 37 38 32 60 -79 15 53 51 16 38 22 15 10 21 17 23 3 54 0 0 17 35 46 20 37 53 34 61 -78 17 13 11 17 58 30 16 28 55 18 44 0 55 0 0 18 57 8 20 38 10 35 62 -76 18 34 9 19 20 17 17 49 7 20 6 37 56 0 0 20 20 4 20 38 27 37 63 -74 19 56 40 20 43 38 19 10 51 21 30 50 57 0 0 21 44 30 20 38 45 39 64 -72 21 20 41 22 8 29 20 34 3 22 56 32 58 0 0 23 10 19 20 39 4 40 65 -71 22 46 5 23 34 44 21 58 39 24 23 40 59 0 0 24 37 26 20 39 23 42 66 -69 24 12 47 25 2 17 23 24 32 25 52 6 60 0 0 26 5 44 20 39 44 43 67 -67 25 40 40 26 31 1 24 51 36 27 21 42 61 0 0 27 35 4 20 40 5 44 69 -65 27 9 34 28 0 46 26 19 43 28 52 20 62 0 0 29 5 17 20 40 26 46 70 -64 28 39 23 29 31 25 27 48 43 30 23 51 63 0 0 30 36 13 20 40 48 47 72 -62 30 9 54 31 2 46 29 18 28 31 56 2 64 0 0 32 7 41 20 41 11 49 74 -60 31 40 58 32 34 37 30 48 47 33 28 44 65 0 0 33 39 28 20 41 34 50 76 -58 33 12 23 34 6 49 32 19 28 35 1 43 66 0 0 35 11 24 20 41 58 51 78 -57 34 43 57 35 39 6 33 50 20 36 34 46 67 0 0 36 43 13 20 42 21 52 80 -55 36 15 26 37 11 17 35 21 11 38 7 39 68 0 0 38 14 44 20 42 45 53 83 -53 37 46 38 38 43 6 36 51 46 39 40 8 69 0 0 39 45 41 20 43 9 54 86 -51 39 17 18 40 14 21 38 21 53 41 11 59 70 0 0 41 15 51 20 43 33 55 88 -50 40 47 12 41 44 46 39 51 19 42 42 56 71 0 0 42 45 0 20 43 57 56 91 -48 42 16 8 43 14 9 41 19 50 44 12 46 72 0 0 44 12 54 20 44 21 57 94 -46 43 43 52 44 42 14 42 47 12 45 41 14 73 0 0 45 39 21 20 44 44 57 97 -45 45 10 11 46 8 50 44 13 15 47 8 7 74 0 0 47 4 9 20 45 7 58 101 -43 46 34 52 47 33 43 45 37 45 48 33 13 75 0 0 48 27 6 20 45 30 58 104 -42 47 57 46 48 56 44 47 0 32 49 56 20 76 0 0 49 48 3 20 45 52 59 107 -40 49 18 42 50 17 42 48 21 26 51 17 19 77 0 0 51 6 50 20 46 14 59 110 -39 50 37 31 51 36 27 49 40 18 52 36 1 78 0 0 52 23 21 20 46 35 59 114 -37 51 54 6 52 52 53 50 57 1 53 52 18 79 0 0 53 37 29 20 46 56 59 117 -36 53 8 21 54 6 55 52 11 28 55 6 4 80 0 0 54 49 9 20 47 16 59 120 -35 54 20 10 55 18 26 53 23 35 56 17 17 81 0 0 55 58 19 20 47 35 59 123 -33 55 29 31 56 27 24 54 33 16 57 25 51 82 0 0 57 4 57 20 47 53 59 126 -32 56 36 22 57 33 48 55 40 32 58 31 47 83 0 0 58 9 1 20 48 11 59 129 -31 57 40 40 58 37 37 56 45 19 59 35 4 84 0 0 59 10 31 20 48 28 58 132 -30 58 42 28 59 38 50 57 47 37 60 35 43 85 0 0 60 9 30 20 48 44 58 134 -29 59 41 44 60 37 31 58 47 29 61 33 45 86 0 0 61 5 59 20 49 0 58 137 -28 60 38 33 61 33 40 59 44 54 62 29 14 87 0 0 62 0 2 20 49 15 57 139 -27 61 32 56 62 27 22 60 39 55 63 22 12 88 0 0 62 51 41 20 49 29 57 142 -26 62 24 56 63 18 40 61 32 37 64 12 45 89 0 0 63 41 2 20 49 43 57 144 -25 63 14 39 64 7 37 62 23 1 65 0 57 90 0 0 64 28 7 20 49 56 56 146 -24 64 2 7 64 54 20 63 11 12 65 46 52 91 0 0 65 13 3 20 50 8 56 149 -23 64 47 25 65 38 52 63 57 14 66 30 36 92 0 0 65 55 53 20 50 20 56 151 -23 65 30 38 66 21 19 64 41 12 67 12 15 93 0 0 66 36 43 20 50 32 55 153 -22 66 11 52 67 1 45 65 23 10 67 51 52 94 0 0 67 15 38 20 50 42 55 154 -21 66 51 11 67 40 17 66 3 14 68 29 35 95 0 0 67 52 44 20 50 53 54 156 -20 67 28 39 68 16 58 66 41 27 69 5 28 96 0 0 68 28 4 20 51 2 54 158 -20 68 4 23 68 51 55 67 17 55 69 39 37 97 0 0 69 1 45 20 51 12 54 160 -19 68 38 26 69 25 12 67 52 43 70 12 7 98 0 0 69 33 50 20 51 21 53 162 -19 69 10 54 69 56 54 68 25 55 70 43 2 99 0 0 70 4 25 20 51 29 53 163 -18 69 41 51 70 27 6 68 57 35 71 12 28 100 0 0 70 33 33 20 51 37 52 165 -17 70 11 22 70 55 53 69 27 47 71 40 29 101 0 0 71 1 20 20 51 45 52 166 -17 70 39 30 71 23 18 69 56 37 72 7 10 102 0 0 71 27 50 20 51 53 52 168 -16 71 6 20 71 49 26 70 24 8 72 32 35 103 0 0 71 53 5 20 52 0 51 169 -16 71 31 57 72 14 21 70 50 24 72 56 47 104 0 0 72 17 11 20 52 7 51 171 -15 71 56 22 72 38 6 71 15 29 73 19 52 105 0 0 72 40 11 20 52 13 51 172 -15 72 19 41 73 0 46 71 39 26 73 41 51 106 0 0 73 2 7 20 52 19 50 174 -15 72 41 57 73 22 23 72 2 18 74 2 50 107 0 0 73 23 4 20 52 26 50 175 -14 73 3 12 73 43 1 72 24 10 74 22 50 108 0 0 73 43 4 20 52 31 50 176 -14 73 23 31 74 2 44 72 45 3 74 41 55 109 0 0 74 2 11 20 52 37 49 178 -13 73 42 54 74 21 32 73 5 0 75 0 8 110 0 0 74 20 26 20 52 42 49 179 -13 74 1 27 74 39 30 73 24 5 75 17 32 111 0 0 74 37 53 20 52 47 49 180 -13 74 19 10 74 56 41 73 42 20 75 34 9 112 0 0 74 54 33 20 52 52 49 182 -12 74 36 6 75 13 5 73 59 48 75 50 1 113 0 0 75 10 30 20 52 57 48 183 -12 74 52 19 75 28 47 74 16 30 76 5 11 114 0 0 75 25 45 20 53 2 48 184 -12 75 7 49 75 43 47 74 32 29 76 19 41 115 0 0 75 40 21 20 53 6 48 185 -11 75 22 38 75 58 8 74 47 47 76 33 32 116 0 0 75 54 18 20 53 11 47 187 -11 75 36 50 76 11 51 75 2 25 76 46 48 117 0 0 76 7 40 20 53 15 47 188 -11 75 50 25 76 24 59 75 16 26 76 59 28 118 0 0 76 20 27 20 53 19 47 189 -10 76 3 25 76 37 33 75 29 52 77 11 36 119 0 0 76 32 42 20 53 23 47 190 -10 76 15 52 76 49 35 75 42 43 77 23 12 120 0 0 76 44 25 20 53 27 47 192 -10 76 27 47 77 1 6 75 55 2 77 34 19 121 0 0 76 55 38 20 53 30 46 193 -10 76 39 12 77 12 7 76 6 50 77 44 57 122 0 0 77 6 23 20 53 34 46 194 -9 76 50 8 77 22 41 76 18 8 77 55 7 123 0 0 77 16 40 20 53 37 46 195 -9 77 0 36 77 32 47 76 28 57 78 4 52 124 0 0 77 26 32 20 53 41 46 196 -9 77 10 38 77 42 28 76 39 20 78 14 11 125 0 0 77 35 58 20 53 44 45 197 -9 77 20 14 77 51 44 76 49 16 78 23 7 126 0 0 77 45 0 20 53 47 45 199 -8 77 29 26 78 0 36 76 58 46 78 31 40 127 0 0 77 53 39 20 53 51 45 200 -8 77 38 15 78 9 6 77 7 53 78 39 50 128 0 0 78 1 56 20 53 54 45 201 -8 77 46 41 78 17 14 77 16 37 78 47 40 129 0 0 78 9 52 20 53 57 45 202 -8 77 54 45 78 25 1 77 24 58 78 55 10 130 0 0 78 17 27 20 53 59 44 203 -8 78 2 29 78 32 28 77 32 58 79 2 20 131 0 0 78 24 43 20 54 2 44 204 -7 78 9 52 78 39 36 77 40 37 79 9 11 132 0 0 78 31 39 20 54 5 44 205 -7 78 16 57 78 46 25 77 47 57 79 15 45 133 0 0 78 38 18 20 54 8 44 207 -7 78 23 43 78 52 56 77 54 57 79 22 1 134 0 0 78 44 39 20 54 11 44 208 -7 78 30 10 78 59 9 78 1 38 79 28 0 135 0 0 78 50 42 20 54 13 43 209 -7 78 36 21 79 5 6 78 8 2 79 33 43 136 0 0 78 56 29 20 54 16 43 210 -6 78 42 15 79 10 47 78 14 9 79 39 11 137 0 0 79 2 1 20 54 18 43 211 -6 78 47 52 79 16 12 78 19 58 79 44 24 138 0 0 79 7 17 20 54 21 43 212 -6 78 53 14 79 21 22 78 25 32 79 49 22 139 0 0 79 12 18 20 54 23 43 213 -6 78 58 21 79 26 17 78 30 49 79 54 5 140 0 0 79 17 4 20 54 25 43 214 -6 79 3 12 79 30 58 78 35 52 79 58 35 141 0 0 79 21 37 20 54 28 42 215 -5 79 7 50 79 35 25 78 40 39 80 2 52 142 0 0 79 25 55 20 54 30 42 216 -5 79 12 14 79 39 39 78 45 13 80 6 56 143 0 0 79 30 1 20 54 32 42 218 -5 79 16 24 79 43 40 78 49 32 80 10 47 144 0 0 79 33 53 20 54 35 42 219 -5 79 20 20 79 47 28 78 53 37 80 14 26 145 0 0 79 37 33 20 54 37 42 220 -5 79 24 4 79 51 3 78 57 30 80 17 54 146 0 0 79 41 0 20 54 39 42 221 -5 79 27 36 79 54 27 79 1 9 80 21 9 147 0 0 79 44 16 20 54 41 41 222 -4 79 30 55 79 57 38 79 4 35 80 24 13 148 0 0 79 47 19 20 54 43 41 223 -4 79 34 2 80 0 38 79 7 49 80 27 6 149 0 0 79 50 11 20 54 45 41 224 -4 79 36 57 80 3 27 79 10 51 80 29 48 150 0 0 79 52 52 20 54 47 41 225 -4 79 39 41 80 6 5 79 13 41 80 32 20 151 0 0 79 55 21 20 54 49 41 226 -4 79 42 14 80 8 31 79 16 19 80 34 41 152 0 0 79 57 40 20 54 51 41 227 -4 79 44 35 80 10 47 79 18 45 80 36 51 153 0 0 79 59 48 20 54 53 40 228 -3 79 46 45 80 12 53 79 21 1 80 38 52 154 0 0 80 1 46 20 54 55 40 229 -3 79 48 45 80 14 48 79 23 5 80 40 43 155 0 0 80 3 33 20 54 57 40 231 -3 79 50 34 80 16 33 79 24 58 80 42 23 156 0 0 80 5 10 20 54 59 40 232 -3 79 52 13 80 18 8 79 26 40 80 43 55 157 0 0 80 6 36 20 55 1 40 233 -3 79 53 41 80 19 33 79 28 12 80 45 16 158 0 0 80 7 53 20 55 3 40 234 -3 79 54 59 80 20 48 79 29 33 80 46 28 159 0 0 80 8 59 20 55 5 40 235 -3 79 56 7 80 21 54 79 30 43 80 47 31 160 0 0 80 9 56 20 55 7 39 236 -2 79 57 5 80 22 49 79 31 43 80 48 25 161 0 0 80 10 43 20 55 9 39 237 -2 79 57 53 80 23 35 79 32 33 80 49 9 162 0 0 80 11 21 20 55 11 39 238 -2 79 58 31 80 24 12 79 33 12 80 49 45 163 0 0 80 11 48 20 55 13 39 239 -2 79 58 59 80 24 39 79 33 41 80 50 11 164 0 0 80 12 7 20 55 15 39 240 -2 79 59 18 80 24 57 79 34 0 80 50 28 165 0 0 80 12 15 20 55 16 39 241 -2 79 59 26 80 25 5 79 34 9 80 50 36 166 0 0 80 12 14 20 55 18 39 242 -2 79 59 25 80 25 4 79 34 8 80 50 35 167 0 0 80 12 3 20 55 20 38 243 -1 79 59 14 80 24 54 79 33 56 80 50 25 168 0 0 80 11 43 20 55 22 38 244 -1 79 58 53 80 24 34 79 33 35 80 50 6 169 0 0 80 11 13 20 55 24 38 245 -1 79 58 23 80 24 5 79 33 3 80 49 38 170 0 0 80 10 33 20 55 26 38 246 -1 79 57 42 80 23 26 79 32 20 80 49 1 171 0 0 80 9 44 20 55 27 38 247 -1 79 56 52 80 22 37 79 31 28 80 48 14 172 0 0 80 8 44 20 55 29 38 249 -1 79 55 51 80 21 39 79 30 25 80 47 19 173 0 0 80 7 35 20 55 31 37 250 -1 79 54 41 80 20 32 79 29 12 80 46 14 174 0 0 80 6 16 20 55 33 37 251 0 79 53 20 80 19 14 79 27 48 80 45 0 175 0 0 80 4 47 20 55 35 37 252 0 79 51 49 80 17 47 79 26 14 80 43 36 176 0 0 80 3 8 20 55 36 37 253 0 79 50 8 80 16 10 79 24 29 80 42 3 Uncertainty in time = +/- 7 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 2408-01341-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 34 11.2837 DE: +33 34 35.137 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .019 ) * V mag [mag]: 10.9 * B mag [mag]: 12.3 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (829) Academia approx. diameter [km]: 41 approx. diameter ["]: .032 distance from Earth [AU]: 1.77000 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1068 number of rejected observations: 42 time covered by the observations: 1914 Feb 28 - 2012 Oct 02 1 sigma uncertainty ellipse (major, minor, PA): 0.037, 0.019, 89° remarks: * orbital elements for (829) Academia : Mean anomaly = 22.11734289 deg Arg. of pericenter = 41.91036643 deg Long. of node = 352.57464423 deg Inclination = 8.28201960 deg Eccentricity = 0.10038785 Semimajor axis = 2.58099915 AU Perihelion dist = 2.32189818 AU Mag: H = 10.95, G = 0.15 Epoch of elements : MJD 56210.86600000 TDT (2012 Oct 10.866) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 10 829 Academia 20h 47.0m UT 10.9 5 34 11.284 33 34 35.14TYC 2408-01341-1 12.3 14.9 41 5.4 1.770 1.328 13.27 111.9343 33.573 -135.06 -7.04 20.7838 -0.31984 0.39687 3.34487 2.67074 -0.00513 -0.00062 2000 21.91149820121010.00000 41.910366352.574644 8.2820200.10038785 2.5809992 2.321898210.7 5.00.15 RATE 2.3769620 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.042 0.027 89 1.99 0.032 0 0-3-3 056208.0020121010_1341-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 18:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org