IOTA/IOTA-ES occultation update for (310) Margarita / TYC 0624-00531-1 event on 2012 Nov 17, 19:04 UT Visible from Russia, SW Asia, Arabia, Africa Summary ------- On 2012 Nov 17 UT, the 31 km diameter asteroid (310) Margarita will occult a 11.7 mag star in the constellation Pisces for observers along a path across Russia, SW Asia, Arabia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.1 mag to 14.7 mag (the magnitude of the asteroid) for at most 2.9 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: 40 * date and approx. time of event: 2012 Nov 17, 18:54 - 2012 Nov 17, 19:12 UT * geocentric midpoint of event [JD]: 2456249.29461667 * magnitude of target star: 11.7 * magnitude drop [mag]: 3.1 * estimated maximum duration [s]: 2.9 * Moon: 21 % sunlit, 98° distance * Sun: 152° distance * rough path description: Russia, SW Asia, Arabia, Africa The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 1.66 * 1 sigma uncertainty interval [seconds]: +/- 4.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .033) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .033", 82° ) * approx speed of asteroid's shadow [km/s]: 10.7199 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0624-00531-1 by 310 Margarita on 2012 Nov 17 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 - 21 0 0 - 1 40 51 19 12 34 28 76 0 - 1 31 24 - 1 50 19 - 0 59 55 - 2 21 39 - 20 0 0 - 1 15 31 19 12 28 29 76 -1 - 1 6 2 - 1 25 0 - 0 34 29 - 1 56 24 - 19 0 0 - 0 49 47 19 12 23 30 76 -2 - 0 40 17 - 0 59 17 - 0 8 40 - 1 30 46 - 18 0 0 - 0 23 40 19 12 17 31 76 -3 - 0 14 9 - 0 33 12 0 17 33 - 1 4 45 - 17 0 0 0 2 49 19 12 11 32 76 -5 0 12 22 - 0 6 44 0 44 8 - 0 38 21 - 16 0 0 0 29 41 19 12 5 33 76 -6 0 39 15 0 20 7 1 11 5 - 0 11 35 - 15 0 0 0 56 54 19 11 58 34 77 -7 1 6 29 0 47 19 1 38 24 0 15 33 - 14 0 0 1 24 28 19 11 52 35 77 -8 1 34 5 1 14 51 2 6 4 0 43 1 - 13 0 0 1 52 22 19 11 45 36 77 -9 2 2 1 1 42 45 2 34 4 1 10 50 - 12 0 0 2 20 37 19 11 38 37 77 -10 2 30 16 2 10 58 3 2 24 1 38 59 - 11 0 0 2 49 10 19 11 31 38 77 -11 2 58 51 2 39 30 3 31 3 2 7 28 - 10 0 0 3 18 3 19 11 23 39 78 -12 3 27 44 3 8 21 4 0 0 2 36 15 - 9 0 0 3 47 13 19 11 16 40 78 -13 3 56 56 3 37 30 4 29 15 3 5 20 - 8 0 0 4 16 40 19 11 8 41 78 -14 4 26 24 4 6 56 4 58 48 3 34 42 - 7 0 0 4 46 24 19 11 0 42 78 -15 4 56 9 4 36 39 5 28 37 4 4 21 - 6 0 0 5 16 24 19 10 52 43 79 -16 5 26 10 5 6 38 5 58 41 4 34 16 - 5 0 0 5 46 39 19 10 44 45 79 -17 5 56 26 5 36 52 6 29 1 5 4 26 - 4 0 0 6 17 8 19 10 36 46 80 -18 6 26 57 6 7 20 6 59 35 5 34 51 - 3 0 0 6 47 51 19 10 27 47 80 -19 6 57 41 6 38 2 7 30 23 6 5 30 - 2 0 0 7 18 47 19 10 19 48 81 -21 7 28 38 7 8 57 8 1 23 6 36 21 - 1 0 0 7 49 56 19 10 10 49 81 -22 7 59 47 7 40 4 8 32 36 7 7 25 0 0 0 8 21 15 19 10 1 50 82 -23 8 31 8 8 11 23 9 4 0 7 38 41 1 0 0 8 52 45 19 9 52 51 82 -24 9 2 39 8 42 52 9 35 34 8 10 7 2 0 0 9 24 25 19 9 43 52 83 -25 9 34 20 9 14 31 10 7 17 8 41 43 3 0 0 9 56 14 19 9 34 53 84 -26 10 6 9 9 46 19 10 39 10 9 13 28 4 0 0 10 28 11 19 9 24 54 84 -27 10 38 7 10 18 15 11 11 10 9 45 22 5 0 0 11 0 14 19 9 15 55 85 -28 11 10 11 10 50 18 11 43 17 10 17 22 6 0 0 11 32 25 19 9 5 56 86 -29 11 42 22 11 22 28 12 15 31 10 49 30 7 0 0 12 4 41 19 8 55 57 87 -30 12 14 39 11 54 43 12 47 49 11 21 43 8 0 0 12 37 1 19 8 46 58 88 -31 12 47 0 12 27 3 13 20 13 11 54 0 9 0 0 13 9 25 19 8 36 59 89 -32 13 19 25 12 59 27 13 52 39 12 26 22 10 0 0 13 41 53 19 8 26 59 90 -33 13 51 53 13 31 53 14 25 9 12 58 47 11 0 0 14 14 22 19 8 16 60 91 -34 14 24 22 14 4 22 14 57 40 13 31 14 12 0 0 14 46 52 19 8 6 61 92 -35 14 56 53 14 36 52 15 30 12 14 3 43 13 0 0 15 19 23 19 7 55 62 94 -36 15 29 24 15 9 22 16 2 45 14 36 11 14 0 0 15 51 53 19 7 45 63 95 -37 16 1 54 15 41 52 16 35 16 15 8 40 15 0 0 16 24 21 19 7 35 64 97 -38 16 34 23 16 14 20 17 7 46 15 41 7 16 0 0 16 56 47 19 7 24 65 98 -39 17 6 50 16 46 46 17 40 13 16 13 32 17 0 0 17 29 10 19 7 14 66 100 -40 17 39 13 17 19 9 18 12 37 16 45 55 18 0 0 18 1 29 19 7 3 66 102 -41 18 11 32 17 51 27 18 44 57 17 18 13 19 0 0 18 33 44 19 6 53 67 104 -42 18 43 46 18 23 41 19 17 12 17 50 27 20 0 0 19 5 52 19 6 42 68 106 -43 19 15 55 18 55 50 19 49 20 18 22 35 21 0 0 19 37 54 19 6 32 69 108 -44 19 47 56 19 27 52 20 21 22 18 54 37 22 0 0 20 9 48 19 6 21 69 111 -45 20 19 51 19 59 46 20 53 16 19 26 31 23 0 0 20 41 35 19 6 11 70 113 -46 20 51 37 20 31 33 21 25 2 19 58 18 24 0 0 21 13 12 19 6 0 70 116 -47 21 23 14 21 3 10 21 56 39 20 29 56 25 0 0 21 44 40 19 5 50 71 119 -48 21 54 42 21 34 38 22 28 6 21 1 25 26 0 0 22 15 57 19 5 39 71 122 -49 22 25 59 22 5 56 22 59 22 21 32 43 27 0 0 22 47 3 19 5 29 72 125 -50 22 57 5 22 37 2 23 30 26 22 3 51 28 0 0 23 17 57 19 5 18 72 128 -51 23 27 58 23 7 56 24 1 19 22 34 46 29 0 0 23 48 38 19 5 8 73 132 -52 23 58 39 23 38 38 24 31 59 23 5 29 30 0 0 24 19 7 19 4 57 73 135 -53 24 29 7 24 9 7 25 2 25 23 36 0 31 0 0 24 49 21 19 4 47 73 139 -53 24 59 21 24 39 21 25 32 37 24 6 16 32 0 0 25 19 20 19 4 36 73 143 -54 25 29 20 25 9 22 26 2 34 24 36 18 33 0 0 25 49 5 19 4 26 73 146 -55 25 59 3 25 39 6 26 32 15 25 6 5 34 0 0 26 18 33 19 4 16 73 150 -56 26 28 31 26 8 35 27 1 41 25 35 36 35 0 0 26 47 45 19 4 6 73 154 -57 26 57 42 26 37 48 27 30 50 26 4 51 36 0 0 27 16 40 19 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38 43 21 18 59 38 57 221 -70 38 52 44 38 33 58 39 23 58 38 2 53 66 0 0 39 1 13 18 59 31 56 223 -70 39 10 35 38 51 51 39 41 44 38 20 51 67 0 0 39 18 41 18 59 24 55 224 -70 39 28 1 39 9 21 39 59 6 38 38 25 68 0 0 39 35 44 18 59 17 55 225 -69 39 45 4 39 26 26 40 16 4 38 55 34 69 0 0 39 52 24 18 59 10 54 226 -69 40 1 42 39 43 6 40 32 38 39 12 19 70 0 0 40 8 39 18 59 3 53 227 -69 40 17 56 39 59 23 40 48 47 39 28 40 71 0 0 40 24 31 18 58 56 53 228 -69 40 33 46 40 15 16 41 4 33 39 44 37 72 0 0 40 39 58 18 58 49 52 229 -69 40 49 12 40 30 45 41 19 55 40 0 10 73 0 0 40 55 2 18 58 43 51 230 -68 41 4 15 40 45 49 41 34 53 40 15 19 74 0 0 41 9 41 18 58 36 50 231 -68 41 18 53 41 0 30 41 49 27 40 30 4 75 0 0 41 23 57 18 58 30 50 232 -68 41 33 7 41 14 47 42 3 38 40 44 25 76 0 0 41 37 49 18 58 23 49 233 -67 41 46 58 41 28 41 42 17 25 40 58 22 77 0 0 41 51 18 18 58 17 48 234 -67 42 0 26 41 42 10 42 30 48 41 11 56 78 0 0 42 4 22 18 58 11 47 235 -67 42 13 29 41 55 16 42 43 48 41 25 5 79 0 0 42 17 4 18 58 5 47 236 -66 42 26 9 42 7 58 42 56 24 41 37 52 80 0 0 42 29 21 18 57 59 46 237 -66 42 38 26 42 20 17 43 8 37 41 50 14 81 0 0 42 41 16 18 57 54 45 237 -65 42 50 19 42 32 13 43 20 26 42 2 13 82 0 0 42 52 47 18 57 48 45 238 -65 43 1 49 42 43 45 43 31 53 42 13 49 83 0 0 43 3 55 18 57 42 44 239 -64 43 12 56 42 54 54 43 42 56 42 25 2 84 0 0 43 14 40 18 57 37 43 240 -64 43 23 40 43 5 40 43 53 37 42 35 51 85 0 0 43 25 2 18 57 31 43 241 -63 43 34 1 43 16 3 44 3 54 42 46 17 86 0 0 43 35 1 18 57 26 42 242 -63 43 43 59 43 26 3 44 13 49 42 56 20 87 0 0 43 44 37 18 57 21 41 243 -62 43 53 34 43 35 40 44 23 21 43 6 0 88 0 0 43 53 50 18 57 16 40 243 -62 44 2 46 43 44 54 44 32 30 43 15 18 89 0 0 44 2 41 18 57 11 40 244 -61 44 11 36 43 53 45 44 41 17 43 24 12 90 0 0 44 11 8 18 57 6 39 245 -61 44 20 3 44 2 14 44 49 41 43 32 44 91 0 0 44 19 14 18 57 1 38 246 -60 44 28 8 44 10 21 44 57 43 43 40 53 92 0 0 44 26 57 18 56 56 38 247 -60 44 35 50 44 18 4 45 5 22 43 48 39 93 0 0 44 34 17 18 56 51 37 248 -59 44 43 10 44 25 26 45 12 39 43 56 3 94 0 0 44 41 16 18 56 47 36 248 -59 44 50 7 44 32 25 45 19 34 44 3 5 95 0 0 44 47 52 18 56 42 36 249 -58 44 56 42 44 39 1 45 26 7 44 9 44 96 0 0 44 54 6 18 56 38 35 250 -58 45 2 56 44 45 16 45 32 18 44 16 0 97 0 0 44 59 57 18 56 34 34 251 -57 45 8 47 44 51 8 45 38 7 44 21 55 98 0 0 45 5 27 18 56 29 34 251 -56 45 14 16 44 56 39 45 43 34 44 27 27 99 0 0 45 10 35 18 56 25 33 252 -56 45 19 23 45 1 47 45 48 40 44 32 37 100 0 0 45 15 20 18 56 21 32 253 -55 45 24 8 45 6 33 45 53 23 44 37 25 101 0 0 45 19 44 18 56 17 31 254 -55 45 28 31 45 10 57 45 57 44 44 41 51 102 0 0 45 23 46 18 56 13 31 255 -54 45 32 33 45 15 0 46 1 44 44 45 55 103 0 0 45 27 26 18 56 10 30 255 -53 45 36 12 45 18 40 46 5 23 44 49 37 104 0 0 45 30 44 18 56 6 29 256 -53 45 39 30 45 21 59 46 8 39 44 52 57 105 0 0 45 33 41 18 56 2 29 257 -52 45 42 26 45 24 55 46 11 34 44 55 54 106 0 0 45 36 15 18 55 59 28 258 -52 45 45 1 45 27 30 46 14 7 44 58 31 107 0 0 45 38 28 18 55 55 27 258 -51 45 47 13 45 29 44 46 16 19 45 0 45 108 0 0 45 40 20 18 55 52 27 259 -50 45 49 4 45 31 35 46 18 9 45 2 37 109 0 0 45 41 49 18 55 48 26 260 -50 45 50 34 45 33 5 46 19 38 45 4 7 110 0 0 45 42 57 18 55 45 25 261 -49 45 51 41 45 34 13 46 20 45 45 5 16 111 0 0 45 43 43 18 55 42 25 261 -49 45 52 27 45 34 59 46 21 31 45 6 2 112 0 0 45 44 7 18 55 39 24 262 -48 45 52 51 45 35 23 46 21 55 45 6 27 113 0 0 45 44 10 18 55 36 23 263 -47 45 52 54 45 35 26 46 21 57 45 6 29 114 0 0 45 43 50 18 55 33 23 264 -47 45 52 34 45 35 6 46 21 38 45 6 10 115 0 0 45 43 9 18 55 30 22 264 -46 45 51 53 45 34 25 46 20 57 45 5 29 116 0 0 45 42 6 18 55 27 21 265 -45 45 50 51 45 33 22 46 19 54 45 4 26 117 0 0 45 40 42 18 55 25 21 266 -45 45 49 26 45 31 57 46 18 30 45 3 0 118 0 0 45 38 55 18 55 22 20 267 -44 45 47 39 45 30 11 46 16 44 45 1 13 119 0 0 45 36 46 18 55 20 19 267 -44 45 45 31 45 28 2 46 14 36 44 59 3 120 0 0 45 34 15 18 55 17 18 268 -43 45 43 0 45 25 31 46 12 6 44 56 32 121 0 0 45 31 23 18 55 15 18 269 -42 45 40 8 45 22 38 46 9 15 44 53 38 122 0 0 45 28 8 18 55 13 17 269 -42 45 36 53 45 19 22 46 6 1 44 50 21 123 0 0 45 24 30 18 55 10 16 270 -41 45 33 16 45 15 45 46 2 25 44 46 43 124 0 0 45 20 31 18 55 8 16 271 -40 45 29 17 45 11 45 45 58 27 44 42 41 125 0 0 45 16 9 18 55 6 15 272 -40 45 24 56 45 7 22 45 54 7 44 38 18 126 0 0 45 11 24 18 55 4 14 272 -39 45 20 12 45 2 38 45 49 25 44 33 31 127 0 0 45 6 17 18 55 3 14 273 -38 45 15 5 44 57 30 45 44 20 44 28 22 128 0 0 45 0 48 18 55 1 13 274 -38 45 9 36 44 52 0 45 38 53 44 22 50 129 0 0 44 54 55 18 54 59 12 274 -37 45 3 44 44 46 7 45 33 3 44 16 55 130 0 0 44 48 40 18 54 58 11 275 -36 44 57 30 44 39 51 45 26 50 44 10 37 131 0 0 44 42 2 18 54 56 11 276 -36 44 50 52 44 33 12 45 20 15 44 3 56 132 0 0 44 35 0 18 54 55 10 277 -35 44 43 51 44 26 10 45 13 17 43 56 51 133 0 0 44 27 35 18 54 53 9 277 -34 44 36 27 44 18 44 45 5 55 43 49 23 134 0 0 44 19 47 18 54 52 9 278 -34 44 28 40 44 10 55 44 58 10 43 41 32 135 0 0 44 11 35 18 54 51 8 279 -33 44 20 29 44 2 43 44 50 2 43 33 16 136 0 0 44 3 0 18 54 50 7 279 -32 44 11 54 43 54 6 44 41 30 43 24 37 137 0 0 43 54 1 18 54 49 6 280 -31 44 2 56 43 45 6 44 32 35 43 15 34 138 0 0 43 44 38 18 54 48 6 281 -31 43 53 34 43 35 42 44 23 16 43 6 7 139 0 0 43 34 51 18 54 47 5 281 -30 43 43 48 43 25 54 44 13 33 42 56 16 140 0 0 43 24 39 18 54 47 4 282 -29 43 33 37 43 15 42 44 3 26 42 46 0 141 0 0 43 14 3 18 54 46 3 283 -29 43 23 2 43 5 5 43 52 54 42 35 20 142 0 0 43 3 3 18 54 46 3 284 -28 43 12 3 42 54 3 43 41 59 42 24 15 143 0 0 42 51 38 18 54 46 2 284 -27 43 0 39 42 42 37 43 30 38 42 12 45 144 0 0 42 39 48 18 54 45 1 285 -26 42 48 50 42 30 46 43 18 53 42 0 50 145 0 0 42 27 32 18 54 45 0 286 -26 42 36 36 42 18 29 43 6 43 41 48 30 Uncertainty in time = +/- 5 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 0624-00531-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 41 36.2672 DE: +11 37 09.979 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .031 ) * V mag [mag]: 11.7 * B mag [mag]: 13.4 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (310) Margarita approx. diameter [km]: 31 approx. diameter ["]: .020 distance from Earth [AU]: 2.14100 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1203 number of rejected observations: 95 time covered by the observations: 1920 Oct 10 - 2012 Sep 28 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.012, 72° remarks: * orbital elements for (310) Margarita : Mean anomaly = 208.34569471 deg Arg. of pericenter = 324.30125958 deg Long. of node = 229.38878370 deg Inclination = 3.17581505 deg Eccentricity = 0.11566283 Semimajor axis = 2.76174731 AU Perihelion dist = 2.44231580 AU Mag: H = 9.98, G = 0.15 Epoch of elements : MJD 56248.79400000 TDT (2012 Nov 17.794) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 17 310 Margarita 19h 4.2m UT 11.7 1 41 36.267 11 37 9.98TYC 0624-00531-1 13.4 14.7 31 2.9 2.141 -1.508 -11.21 42.1000 11.623 -109.78 -19.22 19.0708 -0.12763 0.25235 -5.39938 -2.73072 0.00267 0.00093 2000 206.457205201211 9.00000324.301260229.388784 3.1758150.11566283 2.7617473 2.442315810.0 5.00.15 RATE 2.1474760 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.033 82 2.66 0.033 0 0 2-1 056208.0020121117_0531-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 20:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org