IOTA/IOTA-ES occultation update for (460) Scania / TYC 0625-00659-1 event on 2012 Sep 20, 21:38 UT Visible from Russia, SW Asia, Africa Summary ------- On 2012 Sep 20 UT, the 24 km diameter asteroid (460) Scania will occult a 9.2 mag star in the constellation Aries for observers along a path across Russia, SW Asia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.0 mag to 14.2 mag (the magnitude of the asteroid) for at most 3.7 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: . The event at a glimpse ---------------------- * Rank: 32 * date and approx. time of event: 2012 Sep 20, 21:25 - 2012 Sep 20, 21:52 UT * geocentric midpoint of event [JD]: 2456191.40144167 * magnitude of target star: 9.2 * magnitude drop [mag]: 5.0 * estimated maximum duration [s]: 3.7 * Moon: 29 % sunlit, 146° distance * Sun: 149° distance * rough path description: Russia, SW Asia, Africa The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 2.06 * 1 sigma uncertainty interval [seconds]: +/- 8.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .052 +/- .044) * 1 sigma uncertainty ellipse (major, minor, PA): ( .052", .044", 82° ) * approx speed of asteroid's shadow [km/s]: 6.3305 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0625-00659-1 by 460 Scania on 2012 Sep 20 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 - 28 7 21 - 1 0 0 21 52 17 3 78 -32 - 28 38 51 - 27 36 34 ... .. .. - 25 36 24 - 24 27 41 0 0 0 21 52 11 6 78 -35 - 24 54 45 - 24 1 4 - 26 51 35 - 22 15 38 Latitude Latitude Latitude Latitude - 24 0 0 0 8 14 21 52 10 7 78 -36 0 16 9 0 0 19 0 48 55 - 0 32 10 - 23 0 0 0 26 35 21 52 7 8 78 -37 0 34 32 0 18 39 1 7 23 - 0 13 56 - 22 0 0 0 45 38 21 52 4 9 78 -38 0 53 36 0 37 40 1 26 33 0 5 0 - 21 0 0 1 5 22 21 52 0 10 78 -39 1 13 22 0 57 23 1 46 26 0 24 37 - 20 0 0 1 25 48 21 51 56 11 78 -40 1 33 49 1 17 48 2 7 0 0 44 55 - 19 0 0 1 46 55 21 51 52 12 78 -41 1 54 58 1 38 53 2 28 15 1 5 54 - 18 0 0 2 8 44 21 51 47 13 78 -42 2 16 48 2 0 40 2 50 12 1 27 35 - 17 0 0 2 31 13 21 51 42 14 78 -43 2 39 19 2 23 8 3 12 50 1 49 55 - 16 0 0 2 54 23 21 51 36 15 78 -44 3 2 31 2 46 16 3 36 9 2 12 56 - 15 0 0 3 18 13 21 51 30 16 78 -44 3 26 23 3 10 4 4 0 8 2 36 38 - 14 0 0 3 42 44 21 51 24 17 78 -45 3 50 55 3 34 33 4 24 48 3 0 59 - 13 0 0 4 7 54 21 51 18 18 78 -46 4 16 7 3 59 41 4 50 8 3 26 0 - 12 0 0 4 33 44 21 51 10 19 79 -47 4 41 59 4 25 29 5 16 8 3 51 40 - 11 0 0 5 0 13 21 51 3 20 79 -48 5 8 30 4 51 56 5 42 47 4 17 59 - 10 0 0 5 27 21 21 50 55 21 79 -49 5 35 40 5 19 2 6 10 6 4 44 57 - 9 0 0 5 55 7 21 50 47 22 79 -50 6 3 29 5 46 47 6 38 3 5 12 33 - 8 0 0 6 23 32 21 50 38 23 79 -51 6 31 56 6 15 10 7 6 38 5 40 47 - 7 0 0 6 52 35 21 50 29 25 80 -52 7 1 0 6 44 10 7 35 52 6 9 39 - 6 0 0 7 22 15 21 50 20 26 80 -53 7 30 42 7 13 48 8 5 43 6 39 8 - 5 0 0 7 52 31 21 50 10 27 80 -53 8 1 1 7 44 2 8 36 11 7 9 14 - 4 0 0 8 23 25 21 50 0 28 80 -54 8 31 57 8 14 53 9 7 16 7 39 56 - 3 0 0 8 54 54 21 49 49 29 81 -55 9 3 28 8 46 20 9 38 57 8 11 13 - 2 0 0 9 26 58 21 49 38 30 81 -56 9 35 35 9 18 22 10 11 13 8 43 6 - 1 0 0 9 59 37 21 49 27 31 81 -57 10 8 16 9 50 59 10 44 4 9 15 33 0 0 0 10 32 51 21 49 16 32 82 -57 10 41 32 10 24 10 11 17 30 9 48 35 1 0 0 11 6 38 21 49 4 33 82 -58 11 15 21 10 57 55 11 51 29 10 22 10 2 0 0 11 40 57 21 48 51 34 83 -59 11 49 44 11 32 12 12 26 2 10 56 18 3 0 0 12 15 49 21 48 38 35 83 -59 12 24 38 12 7 2 13 1 6 11 30 57 4 0 0 12 51 13 21 48 25 36 84 -60 13 0 4 12 42 23 13 36 42 12 6 8 5 0 0 13 27 7 21 48 12 37 84 -60 13 36 1 13 18 14 14 12 49 12 41 50 6 0 0 14 3 31 21 47 58 38 85 -61 14 12 27 13 54 36 14 49 26 13 18 2 7 0 0 14 40 24 21 47 44 38 86 -61 14 49 23 14 31 27 15 26 33 13 54 42 8 0 0 15 17 45 21 47 30 39 86 -62 15 26 47 15 8 45 16 4 7 14 31 51 9 0 0 15 55 34 21 47 15 40 87 -62 16 4 38 15 46 31 16 42 9 15 9 27 10 0 0 16 33 49 21 47 0 41 88 -63 16 42 55 16 24 44 17 20 37 15 47 29 11 0 0 17 12 29 21 46 45 42 89 -63 17 21 38 17 3 21 17 59 30 16 25 56 12 0 0 17 51 34 21 46 30 43 90 -63 18 0 45 17 42 23 18 38 48 17 4 48 13 0 0 18 31 1 21 46 14 44 90 -63 18 40 15 18 21 49 19 18 29 17 44 3 14 0 0 19 10 52 21 45 58 45 91 -64 19 20 8 19 1 36 19 58 32 18 23 40 15 0 0 19 51 3 21 45 42 46 92 -64 20 0 21 19 41 45 20 38 56 19 3 39 16 0 0 20 31 34 21 45 25 47 94 -64 20 40 55 20 22 13 21 19 40 19 43 57 17 0 0 21 12 23 21 45 9 47 95 -64 21 21 47 21 3 1 22 0 43 20 24 34 18 0 0 21 53 31 21 44 52 48 96 -64 22 2 57 21 44 6 22 42 3 21 5 29 19 0 0 22 34 54 21 44 34 49 97 -64 22 44 23 22 25 27 23 23 40 21 46 40 20 0 0 23 16 33 21 44 17 50 98 -63 23 26 4 23 7 3 24 5 31 22 28 7 21 0 0 23 58 25 21 44 0 50 100 -63 24 7 59 23 48 52 24 47 36 23 9 47 22 0 0 24 40 29 21 43 42 51 101 -63 24 50 5 24 30 54 25 29 53 23 51 39 23 0 0 25 22 45 21 43 24 52 103 -62 25 32 23 25 13 7 26 12 20 24 33 43 24 0 0 26 5 10 21 43 7 52 104 -62 26 14 50 25 55 30 26 54 57 25 15 56 25 0 0 26 47 43 21 42 49 53 106 -62 26 57 26 26 38 1 27 37 42 25 58 18 26 0 0 27 30 22 21 42 30 54 107 -61 27 40 8 27 20 38 28 20 33 26 40 47 27 0 0 28 13 7 21 42 12 54 109 -61 28 22 55 28 3 21 29 3 29 27 23 21 28 0 0 28 55 56 21 41 54 55 111 -60 29 5 45 28 46 8 29 46 29 28 5 59 29 0 0 29 38 47 21 41 36 55 113 -60 29 48 38 29 28 57 30 29 30 28 48 40 30 0 0 30 21 38 21 41 18 56 114 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39 58 50 41 1 28 39 17 13 45 0 0 40 49 5 21 36 49 58 146 -47 40 59 17 40 38 54 41 41 35 39 57 16 46 0 0 41 28 47 21 36 32 57 148 -47 41 39 0 41 18 36 42 21 20 40 36 57 47 0 0 42 8 6 21 36 16 57 150 -46 42 18 19 41 57 55 43 0 40 41 16 15 48 0 0 42 47 1 21 35 59 57 152 -45 42 57 14 42 36 50 43 39 35 41 55 9 49 0 0 43 25 30 21 35 43 57 154 -44 43 35 42 43 15 19 44 18 4 42 33 38 50 0 0 44 3 32 21 35 27 56 156 -43 44 13 45 43 53 21 44 56 5 43 11 42 51 0 0 44 41 7 21 35 11 56 158 -42 44 51 19 44 30 56 45 33 38 43 49 18 52 0 0 45 18 13 21 34 56 56 160 -42 45 28 24 45 8 3 46 10 41 44 26 26 53 0 0 45 54 49 21 34 40 55 162 -41 46 5 0 45 44 40 46 47 15 45 3 6 54 0 0 46 30 56 21 34 25 55 164 -40 46 41 6 46 20 47 47 23 17 45 39 15 55 0 0 47 6 31 21 34 11 55 166 -39 47 16 40 46 56 23 47 58 48 46 14 55 56 0 0 47 41 34 21 33 56 54 167 -38 47 51 43 47 31 27 48 33 47 46 50 3 57 0 0 48 16 5 21 33 42 54 169 -38 48 26 13 48 6 0 49 8 12 47 24 40 58 0 0 48 50 4 21 33 28 53 171 -37 49 0 10 48 39 59 49 42 4 47 58 44 59 0 0 49 23 28 21 33 14 53 172 -36 49 33 33 49 13 25 50 15 21 48 32 15 60 0 0 49 56 19 21 33 0 52 174 -35 50 6 22 49 46 17 50 48 5 49 5 13 61 0 0 50 28 35 21 32 47 52 176 -34 50 38 37 50 18 35 51 20 13 49 37 37 62 0 0 51 0 17 21 32 34 51 177 -34 51 10 17 50 50 18 51 51 46 50 9 28 63 0 0 51 31 24 21 32 21 51 179 -33 51 41 22 51 21 27 52 22 43 50 40 43 64 0 0 52 1 55 21 32 9 50 180 -32 52 11 52 51 52 0 52 53 5 51 11 24 65 0 0 52 31 52 21 31 57 50 182 -31 52 41 46 52 21 59 53 22 51 51 41 30 66 0 0 53 1 13 21 31 45 49 183 -31 53 11 5 52 51 22 53 52 2 52 11 2 67 0 0 53 29 58 21 31 33 49 184 -30 53 39 48 53 20 9 54 20 36 52 39 58 68 0 0 53 58 8 21 31 22 48 186 -29 54 7 56 53 48 21 54 48 34 53 8 19 69 0 0 54 25 43 21 31 10 48 187 -28 54 35 28 54 15 58 55 15 57 53 36 5 70 0 0 54 52 42 21 31 0 47 188 -28 55 2 25 54 43 0 55 42 44 54 3 16 71 0 0 55 19 5 21 30 49 47 190 -27 55 28 46 55 9 26 56 8 55 54 29 51 72 0 0 55 44 54 21 30 38 46 191 -26 55 54 33 55 35 17 56 34 30 54 55 53 73 0 0 56 10 8 21 30 28 46 192 -26 56 19 44 56 0 33 56 59 31 55 21 19 74 0 0 56 34 47 21 30 18 45 193 -25 56 44 20 56 25 15 57 23 57 55 46 11 75 0 0 56 58 51 21 30 9 45 195 -24 57 8 22 56 49 22 57 47 48 56 10 29 76 0 0 57 22 22 21 29 59 44 196 -24 57 31 50 57 12 55 58 11 4 56 34 12 77 0 0 57 45 18 21 29 50 44 197 -23 57 54 44 57 35 54 58 33 47 56 57 22 78 0 0 58 7 41 21 29 41 43 198 -22 58 17 4 57 58 20 58 55 56 57 19 59 79 0 0 58 29 31 21 29 32 43 199 -22 58 38 51 58 20 13 59 17 31 57 42 3 80 0 0 58 50 49 21 29 23 42 201 -21 59 0 6 58 41 32 59 38 34 58 3 34 81 0 0 59 11 33 21 29 15 42 202 -21 59 20 48 59 2 20 59 59 4 58 24 32 82 0 0 59 31 46 21 29 7 41 203 -20 59 40 58 59 22 36 60 19 3 58 44 59 83 0 0 59 51 27 21 28 59 41 204 -19 60 0 36 59 42 20 60 38 30 59 4 54 84 0 0 60 10 37 21 28 51 40 205 -19 60 19 44 60 1 32 60 57 25 59 24 18 85 0 0 60 29 17 21 28 43 40 206 -18 60 38 20 60 20 15 61 15 50 59 43 12 86 0 0 60 47 26 21 28 36 39 207 -18 60 56 27 60 38 27 61 33 45 60 1 35 87 0 0 61 5 5 21 28 29 39 208 -17 61 14 3 60 56 9 61 51 10 60 19 28 88 0 0 61 22 16 21 28 22 38 209 -17 61 31 11 61 13 22 62 8 6 60 36 52 89 0 0 61 38 57 21 28 15 38 210 -16 61 47 49 61 30 5 62 24 33 60 53 47 90 0 0 61 55 10 21 28 8 37 211 -16 62 3 59 61 46 21 62 40 32 61 10 13 91 0 0 62 10 55 21 28 1 37 212 -15 62 19 42 62 2 9 62 56 3 61 26 11 92 0 0 62 26 12 21 27 55 36 214 -15 62 34 56 62 17 29 63 11 7 61 41 42 93 0 0 62 41 2 21 27 49 36 215 -14 62 49 44 62 32 22 63 25 44 61 56 46 94 0 0 62 55 26 21 27 43 35 216 -14 63 4 5 62 46 48 63 39 54 62 11 22 95 0 0 63 9 24 21 27 37 35 217 -13 63 18 0 63 0 48 63 53 39 62 25 33 96 0 0 63 22 56 21 27 31 35 218 -13 63 31 30 63 14 23 64 6 58 62 39 17 97 0 0 63 36 3 21 27 25 34 219 -12 63 44 34 63 27 32 64 19 52 62 52 37 98 0 0 63 48 45 21 27 19 34 220 -12 63 57 14 63 40 16 64 32 21 63 5 31 99 0 0 64 1 2 21 27 14 33 221 -11 64 9 29 63 52 36 64 44 26 63 18 0 100 0 0 64 12 56 21 27 9 33 222 -11 64 21 20 64 4 32 64 56 8 63 30 6 101 0 0 64 24 26 21 27 3 32 223 -10 64 32 48 64 16 4 65 7 26 63 41 47 102 0 0 64 35 32 21 26 58 32 224 -10 64 43 52 64 27 13 65 18 21 63 53 5 103 0 0 64 46 16 21 26 53 32 225 -9 64 54 34 64 37 59 65 28 54 64 4 0 104 0 0 64 56 38 21 26 48 31 226 -9 65 4 54 64 48 23 65 39 4 64 14 32 105 0 0 65 6 37 21 26 44 31 227 -8 65 14 51 64 58 25 65 48 53 64 24 42 106 0 0 65 16 15 21 26 39 30 228 -8 65 24 27 65 8 5 65 58 21 64 34 31 107 0 0 65 25 32 21 26 34 30 229 -7 65 33 41 65 17 23 66 7 27 64 43 57 108 0 0 65 34 27 21 26 30 29 230 -7 65 42 35 65 26 20 66 16 12 64 53 2 109 0 0 65 43 2 21 26 26 29 231 -7 65 51 8 65 34 57 66 24 37 65 1 46 110 0 0 65 51 17 21 26 21 29 232 -6 65 59 21 65 43 13 66 32 43 65 10 10 111 0 0 65 59 11 21 26 17 28 233 -6 66 7 13 65 51 9 66 40 28 65 18 13 112 0 0 66 6 45 21 26 13 28 234 -5 66 14 46 65 58 46 66 47 54 65 25 56 113 0 0 66 14 1 21 26 9 27 234 -5 66 21 59 66 6 2 66 55 0 65 33 20 114 0 0 66 20 56 21 26 5 27 235 -4 66 28 54 66 13 0 67 1 48 65 40 23 115 0 0 66 27 33 21 26 1 27 236 -4 66 35 29 66 19 38 67 8 17 65 47 8 116 0 0 66 33 52 21 25 57 26 237 -4 66 41 46 66 25 58 67 14 28 65 53 34 117 0 0 66 39 51 21 25 54 26 238 -3 66 47 44 66 31 59 67 20 20 65 59 40 118 0 0 66 45 33 21 25 50 26 239 -3 66 53 24 66 37 42 67 25 55 66 5 29 119 0 0 66 50 56 21 25 47 25 240 -2 66 58 47 66 43 6 67 31 12 66 10 58 120 0 0 66 56 2 21 25 43 25 241 -2 67 3 51 66 48 13 67 36 11 66 16 10 121 0 0 67 0 50 21 25 40 24 242 -2 67 8 38 66 53 2 67 40 53 66 21 4 122 0 0 67 5 20 21 25 36 24 243 -1 67 13 7 66 57 34 67 45 18 66 25 40 123 0 0 67 9 33 21 25 33 24 244 -1 67 17 19 67 1 48 67 49 26 66 29 58 124 0 0 67 13 29 21 25 30 23 245 -1 67 21 14 67 5 45 67 53 17 66 33 59 125 0 0 67 17 8 21 25 27 23 246 0 67 24 52 67 9 25 67 56 51 66 37 43 Uncertainty in time = +/- 9 secs Prediction of 2012 Sep 8.0 Data for the target star ------------------------ * name: TYC 0625-00659-1 * constellation : Aries * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 47 49.9842 DE: +12 16 03.704 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .038, .039 ) * V mag [mag]: 9.2 * B mag [mag]: 10.1 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (460) Scania approx. diameter [km]: 24 approx. diameter ["]: .022 distance from Earth [AU]: 1.52300 * orbital information: orbit source: Preston date of fit: 2012 Sep 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1042 number of rejected observations: 79 time covered by the observations: 1900 Oct 25 - 2012 Sep 01 1 sigma uncertainty ellipse (major, minor, PA): 0.036, 0.020, 74° remarks: * orbital elements for (460) Scania : Mean anomaly = 7.15338661 deg Arg. of pericenter = 162.81637783 deg Long. of node = 205.36935257 deg Inclination = 4.63767679 deg Eccentricity = 0.10395996 Semimajor axis = 2.71737520 AU Perihelion dist = 2.43487699 AU Mag: H = 10.67, G = 0.15 Epoch of elements : MJD 56190.90100000 TDT (2012 Sep 20.901) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Sep 20 460 Scania 21h 38.1m UT 9.2 1 47 49.984 12 16 3.70TYC 0625-00659-1 10.1 14.2 24 3.7 1.523 -1.174 -11.41 62.2616 12.272 -146.23 0.67 21.6346 -0.29336 0.43973 -2.97729 -1.97555 -0.00265 -0.00110 2000 6.9551412012 920.00000162.816378205.369353 4.6376770.10395996 2.7173752 2.434877010.6 5.00.15 RATE 2.2002890 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.052 0.044 82 3.06 0.045 0 0 2 4 056178.0020120920_0659-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 07, 23:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org