IOTA/IOTA-ES occultation update for (87) Sylvia / UCAC2 41332819 event on 2012 Dec 22, 05:25 UT Visible from S USA, Mexico Summary ------- On 2012 Dec 22 UT, the 263 km diameter asteroid (87) Sylvia will occult a 12.0 mag star in the constellation Taurus for observers along a path across S USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.8 mag to 12.0 mag (the magnitude of the asteroid) for at most 17.4 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: 99 * date and approx. time of event: 2012 Dec 22, 05:18 - 2012 Dec 22, 05:32 UT * geocentric midpoint of event [JD]: 2456283.72629167 * magnitude of target star: 12.0 * magnitude drop [mag]: 0.8 * estimated maximum duration [s]: 17.4 * Moon: 69 % sunlit, 64° distance * Sun: 174° distance * rough path description: S USA, Mexico The occultation path -------------------- * approximate projected width [km]: 263 * 1 sigma uncertainty interval [path widths]: +/- 0.26 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .036) * 1 sigma uncertainty ellipse (major, minor, PA): ( .036", .033", 359° ) * approx speed of asteroid's shadow [km/s]: 15.1313 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 41332819 by 87 Sylvia on 2012 Dec 22 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 -177 0 0 10 18 57 5 32 51 6 63 -1 11 38 40 8 59 12 12 20 7 8 17 43 -176 0 0 10 48 27 5 32 50 7 64 -2 12 8 2 9 28 50 12 49 25 8 47 25 -175 0 0 11 17 39 5 32 49 8 64 -3 12 37 5 9 58 10 13 18 23 9 16 49 -174 0 0 11 46 31 5 32 48 9 64 -4 13 5 49 10 27 12 13 47 3 9 45 55 -173 0 0 12 15 4 5 32 46 10 64 -5 13 34 13 10 55 54 14 15 22 10 14 42 -172 0 0 12 43 17 5 32 45 11 64 -6 14 2 17 11 24 16 14 43 21 10 43 9 -171 0 0 13 11 10 5 32 43 12 65 -7 14 30 0 11 52 18 15 11 0 11 11 16 -170 0 0 13 38 41 5 32 42 13 65 -8 14 57 22 12 19 59 15 38 17 11 39 2 -169 0 0 14 5 52 5 32 40 14 65 -10 15 24 23 12 47 19 16 5 13 12 6 27 -168 0 0 14 32 40 5 32 38 16 65 -11 15 51 1 13 14 17 16 31 46 12 33 30 -167 0 0 14 59 6 5 32 36 17 66 -12 16 17 17 13 40 53 16 57 57 13 0 11 -166 0 0 15 25 9 5 32 33 18 66 -13 16 43 11 14 7 6 17 23 45 13 26 29 -165 0 0 15 50 49 5 32 31 19 66 -14 17 8 41 14 32 56 17 49 10 13 52 25 -164 0 0 16 16 6 5 32 28 20 66 -15 17 33 48 14 58 24 18 14 12 14 17 57 -163 0 0 16 41 0 5 32 26 21 67 -16 17 58 31 15 23 27 18 38 49 14 43 6 -162 0 0 17 5 29 5 32 23 22 67 -17 18 22 50 15 48 6 19 3 3 15 7 51 -161 0 0 17 29 34 5 32 20 23 67 -18 18 46 44 16 12 22 19 26 52 15 32 12 -160 0 0 17 53 14 5 32 17 24 68 -19 19 10 14 16 36 13 19 50 17 15 56 8 -159 0 0 18 16 30 5 32 14 25 68 -20 19 33 20 16 59 39 20 13 17 16 19 39 -158 0 0 18 39 21 5 32 11 26 68 -21 19 56 0 17 22 40 20 35 52 16 42 46 -157 0 0 19 1 46 5 32 8 27 68 -22 20 18 15 17 45 16 20 58 2 17 5 27 -156 0 0 19 23 46 5 32 4 28 69 -23 20 40 5 18 7 26 21 19 47 17 27 43 -155 0 0 19 45 21 5 32 1 29 69 -24 21 1 30 18 29 11 21 41 6 17 49 34 -154 0 0 20 6 30 5 31 57 30 69 -25 21 22 29 18 50 31 22 2 0 18 10 58 -153 0 0 20 27 14 5 31 54 31 70 -26 21 43 2 19 11 24 22 22 28 18 31 57 -152 0 0 20 47 31 5 31 50 32 70 -27 22 3 10 19 31 52 22 42 30 18 52 30 -151 0 0 21 7 23 5 31 46 33 70 -28 22 22 51 19 51 53 23 2 6 19 12 37 -150 0 0 21 26 48 5 31 42 34 71 -29 22 42 7 20 11 29 23 21 16 19 32 17 -149 0 0 21 45 47 5 31 38 35 71 -30 23 0 56 20 30 38 23 40 1 19 51 32 -148 0 0 22 4 21 5 31 34 36 72 -31 23 19 20 20 49 21 23 58 19 20 10 19 -147 0 0 22 22 27 5 31 30 37 72 -32 23 37 17 21 7 37 24 16 12 20 28 41 -146 0 0 22 40 8 5 31 25 38 72 -33 23 54 48 21 25 27 24 33 38 20 46 36 -145 0 0 22 57 22 5 31 21 39 73 -34 24 11 53 21 42 51 24 50 38 21 4 4 -144 0 0 23 14 10 5 31 17 39 73 -35 24 28 32 21 59 48 25 7 12 21 21 6 -143 0 0 23 30 32 5 31 12 40 73 -35 24 44 44 22 16 18 25 23 20 21 37 41 -142 0 0 23 46 27 5 31 8 41 74 -36 25 0 30 22 32 22 25 39 1 21 53 50 -141 0 0 24 1 56 5 31 3 42 74 -37 25 15 51 22 48 0 25 54 17 22 9 32 -140 0 0 24 16 58 5 30 59 43 75 -38 25 30 45 23 3 11 26 9 7 22 24 48 -139 0 0 24 31 34 5 30 54 44 75 -39 25 45 12 23 17 55 26 23 30 22 39 37 -138 0 0 24 45 44 5 30 49 45 75 -40 25 59 14 23 32 13 26 37 28 22 53 59 -137 0 0 24 59 28 5 30 44 46 76 -41 26 12 50 23 46 5 26 50 59 23 7 54 -136 0 0 25 12 45 5 30 39 47 76 -42 26 25 59 23 59 30 27 4 5 23 21 24 -135 0 0 25 25 36 5 30 34 48 77 -43 26 38 43 24 12 29 27 16 44 23 34 26 -134 0 0 25 38 1 5 30 30 49 77 -44 26 51 0 24 25 1 27 28 58 23 47 2 -133 0 0 25 50 0 5 30 24 50 78 -45 27 2 52 24 37 7 27 40 46 23 59 12 -132 0 0 26 1 32 5 30 19 50 78 -46 27 14 18 24 48 46 27 52 8 24 10 55 -131 0 0 26 12 39 5 30 14 51 78 -46 27 25 17 25 0 0 28 3 4 24 22 12 -130 0 0 26 23 20 5 30 9 52 79 -47 27 35 52 25 10 47 28 13 35 24 33 2 -129 0 0 26 33 34 5 30 4 53 79 -48 27 46 0 25 21 8 28 23 40 24 43 27 -128 0 0 26 43 23 5 29 59 54 80 -49 27 55 43 25 31 2 28 33 20 24 53 24 -127 0 0 26 52 46 5 29 53 55 80 -50 28 5 0 25 40 31 28 42 34 25 2 56 -126 0 0 27 1 43 5 29 48 56 81 -51 28 13 51 25 49 34 28 51 22 25 12 2 -125 0 0 27 10 14 5 29 42 57 81 -52 28 22 17 25 58 10 28 59 46 25 20 41 -124 0 0 27 18 20 5 29 37 58 81 -53 28 30 18 26 6 21 29 7 44 25 28 54 -123 0 0 27 26 0 5 29 32 58 82 -53 28 37 53 26 14 6 29 15 16 25 36 41 -122 0 0 27 33 14 5 29 26 59 82 -54 28 45 3 26 21 24 29 22 24 25 44 3 -121 0 0 27 40 3 5 29 20 60 83 -55 28 51 47 26 28 18 29 29 6 25 50 58 -120 0 0 27 46 26 5 29 15 61 83 -56 28 58 6 26 34 45 29 35 23 25 57 27 -119 0 0 27 52 24 5 29 9 62 84 -57 29 4 0 26 40 46 29 41 15 26 3 31 -118 0 0 27 57 56 5 29 4 63 84 -58 29 9 29 26 46 22 29 46 42 26 9 9 -117 0 0 28 3 3 5 28 58 64 85 -59 29 14 33 26 51 33 29 51 44 26 14 21 -116 0 0 28 7 45 5 28 52 65 85 -60 29 19 12 26 56 17 29 56 21 26 19 7 -115 0 0 28 12 1 5 28 46 65 86 -60 29 23 25 27 0 36 30 0 34 26 23 28 -114 0 0 28 15 52 5 28 41 66 86 -61 29 27 14 27 4 30 30 4 21 26 27 22 -113 0 0 28 19 18 5 28 35 67 86 -62 29 30 38 27 7 58 30 7 43 26 30 52 -112 0 0 28 22 19 5 28 29 68 87 -63 29 33 36 27 11 1 30 10 41 26 33 55 -111 0 0 28 24 54 5 28 23 69 87 -64 29 36 10 27 13 38 30 13 14 26 36 33 -110 0 0 28 27 5 5 28 17 70 88 -65 29 38 19 27 15 50 30 15 22 26 38 46 -109 0 0 28 28 50 5 28 11 71 88 -66 29 40 3 27 17 36 30 17 6 26 40 33 -108 0 0 28 30 10 5 28 5 71 89 -66 29 41 23 27 18 57 30 18 25 26 41 54 -107 0 0 28 31 5 5 27 59 72 89 -67 29 42 17 27 19 53 30 19 19 26 42 50 -106 0 0 28 31 35 5 27 53 73 90 -68 29 42 47 27 20 23 30 19 49 26 43 21 -105 0 0 28 31 40 5 27 47 74 90 -69 29 42 52 27 20 28 30 19 53 26 43 26 -104 0 0 28 31 20 5 27 41 75 91 -70 29 42 32 27 20 8 30 19 34 26 43 6 -103 0 0 28 30 35 5 27 35 76 91 -71 29 41 47 27 19 22 30 18 49 26 42 20 -102 0 0 28 29 25 5 27 29 76 92 -71 29 40 38 27 18 11 30 17 40 26 41 8 -101 0 0 28 27 50 5 27 23 77 92 -72 29 39 4 27 16 35 30 16 7 26 39 32 -100 0 0 28 25 49 5 27 16 78 92 -73 29 37 5 27 14 34 30 14 8 26 37 29 - 99 0 0 28 23 24 5 27 10 79 93 -74 29 34 41 27 12 7 30 11 45 26 35 2 - 98 0 0 28 20 34 5 27 4 80 93 -75 29 31 53 27 9 15 30 8 58 26 32 9 - 97 0 0 28 17 18 5 26 58 81 94 -76 29 28 39 27 5 57 30 5 46 26 28 50 - 96 0 0 28 13 38 5 26 52 82 94 -76 29 25 1 27 2 14 30 2 9 26 25 6 - 95 0 0 28 9 32 5 26 45 82 95 -77 29 20 58 26 58 6 29 58 7 26 20 56 - 94 0 0 28 5 2 5 26 39 83 95 -78 29 16 30 26 53 33 29 53 41 26 16 21 - 93 0 0 28 0 6 5 26 33 84 96 -79 29 11 38 26 48 34 29 48 50 26 11 21 - 92 0 0 27 54 45 5 26 26 85 96 -80 29 6 20 26 43 9 29 43 34 26 5 55 - 91 0 0 27 48 59 5 26 20 86 97 -81 29 0 38 26 37 20 29 37 53 26 0 3 - 90 0 0 27 42 47 5 26 14 86 97 -81 28 54 30 26 31 4 29 31 48 25 53 46 - 89 0 0 27 36 11 5 26 7 87 97 -82 28 47 58 26 24 24 29 25 18 25 47 3 - 88 0 0 27 29 9 5 26 1 88 98 -83 28 41 0 26 17 17 29 18 22 25 39 55 - 87 0 0 27 21 42 5 25 54 88 98 -84 28 33 38 26 9 46 29 11 2 25 32 20 - 86 0 0 27 13 49 5 25 48 88 279 -84 28 25 50 26 1 48 29 3 17 25 24 21 - 85 0 0 27 5 32 5 25 42 87 279 -85 28 17 37 25 53 25 28 55 7 25 15 55 - 84 0 0 26 56 48 5 25 35 87 280 -86 28 9 0 25 44 37 28 46 32 25 7 4 - 83 0 0 26 47 40 5 25 29 86 280 -86 27 59 57 25 35 23 28 37 32 24 57 47 - 82 0 0 26 38 6 5 25 22 85 281 -86 27 50 28 25 25 43 28 28 7 24 48 4 - 81 0 0 26 28 6 5 25 16 85 281 -86 27 40 35 25 15 37 28 18 16 24 37 55 - 80 0 0 26 17 41 5 25 9 84 281 -86 27 30 16 25 5 6 28 8 1 24 27 21 - 79 0 0 26 6 51 5 25 3 83 282 -86 27 19 32 24 54 9 27 57 20 24 16 20 - 78 0 0 25 55 35 5 24 56 82 282 -86 27 8 22 24 42 46 27 46 14 24 4 54 - 77 0 0 25 43 53 5 24 49 81 283 -85 26 56 48 24 30 58 27 34 43 23 53 2 - 76 0 0 25 31 46 5 24 43 80 283 -84 26 44 47 24 18 43 27 22 46 23 40 44 - 75 0 0 25 19 13 5 24 36 80 284 -84 26 32 22 24 6 3 27 10 24 23 28 0 - 74 0 0 25 6 14 5 24 30 79 284 -83 26 19 30 23 52 57 26 57 37 23 14 50 - 73 0 0 24 52 50 5 24 23 78 284 -82 26 6 14 23 39 25 26 44 24 23 1 14 - 72 0 0 24 39 0 5 24 17 77 285 -81 25 52 32 23 25 27 26 30 46 22 47 12 - 71 0 0 24 24 44 5 24 10 76 285 -80 25 38 24 23 11 4 26 16 43 22 32 44 - 70 0 0 24 10 3 5 24 4 75 286 -79 25 23 51 22 56 14 26 2 14 22 17 50 - 69 0 0 23 54 56 5 23 57 74 286 -79 25 8 52 22 40 59 25 47 19 22 2 31 - 68 0 0 23 39 23 5 23 50 73 286 -78 24 53 28 22 25 17 25 31 59 21 46 45 - 67 0 0 23 23 24 5 23 44 72 287 -77 24 37 38 22 9 10 25 16 14 21 30 33 - 66 0 0 23 7 0 5 23 37 71 287 -76 24 21 22 21 52 38 25 0 3 21 13 56 - 65 0 0 22 50 11 5 23 31 70 287 -75 24 4 42 21 35 39 24 43 27 20 56 53 - 64 0 0 22 32 55 5 23 24 69 288 -74 23 47 35 21 18 15 24 26 26 20 39 24 - 63 0 0 22 15 15 5 23 18 69 288 -73 23 30 4 21 0 25 24 8 59 20 21 29 - 62 0 0 21 57 8 5 23 11 68 289 -72 23 12 7 20 42 9 23 51 6 20 3 9 - 61 0 0 21 38 37 5 23 5 67 289 -71 22 53 44 20 23 28 23 32 49 19 44 23 - 60 0 0 21 19 40 5 22 58 66 289 -70 22 34 57 20 4 22 23 14 6 19 25 12 - 59 0 0 21 0 17 5 22 52 65 290 -69 22 15 44 19 44 50 22 54 58 19 5 35 - 58 0 0 20 40 30 5 22 46 64 290 -68 21 56 6 19 24 53 22 35 25 18 45 33 - 57 0 0 20 20 17 5 22 39 63 290 -67 21 36 3 19 4 31 22 15 28 18 25 5 - 56 0 0 19 59 40 5 22 33 62 291 -67 21 15 35 18 43 44 21 55 5 18 4 13 - 55 0 0 19 38 38 5 22 27 61 291 -66 20 54 43 18 22 32 21 34 17 17 42 56 - 54 0 0 19 17 11 5 22 20 60 291 -65 20 33 26 18 0 55 21 13 5 17 21 14 - 53 0 0 18 55 19 5 22 14 59 292 -64 20 11 44 17 38 54 20 51 29 16 59 8 - 52 0 0 18 33 4 5 22 8 58 292 -63 19 49 38 17 16 28 20 29 28 16 36 37 - 51 0 0 18 10 24 5 22 2 57 292 -62 19 27 8 16 53 38 20 7 3 16 13 43 - 50 0 0 17 47 20 5 21 55 56 293 -61 19 4 14 16 30 25 19 44 14 15 50 24 - 49 0 0 17 23 53 5 21 49 55 293 -60 18 40 57 16 6 48 19 21 1 15 26 42 - 48 0 0 17 0 2 5 21 43 54 293 -59 18 17 15 15 42 47 18 57 25 15 2 36 - 47 0 0 16 35 48 5 21 37 53 293 -58 17 53 11 15 18 23 18 33 26 14 38 7 - 46 0 0 16 11 11 5 21 31 52 294 -57 17 28 44 14 53 37 18 9 4 14 13 16 - 45 0 0 15 46 11 5 21 25 51 294 -56 17 3 54 14 28 28 17 44 19 13 48 1 - 44 0 0 15 20 49 5 21 20 50 294 -55 16 38 41 14 2 56 17 19 11 13 22 25 - 43 0 0 14 55 6 5 21 14 49 294 -54 16 13 7 13 37 3 16 53 42 12 56 27 - 42 0 0 14 29 0 5 21 8 48 295 -52 15 47 11 13 10 49 16 27 50 12 30 8 - 41 0 0 14 2 34 5 21 2 47 295 -51 15 20 54 12 44 13 16 1 38 12 3 27 - 40 0 0 13 35 47 5 20 57 46 295 -50 14 54 15 12 17 17 15 35 4 11 36 26 - 39 0 0 13 8 39 5 20 51 45 295 -49 14 27 16 11 50 0 15 8 10 11 9 5 - 38 0 0 12 41 11 5 20 46 44 296 -48 13 59 58 11 22 24 14 40 55 10 41 24 - 37 0 0 12 13 24 5 20 41 42 296 -47 13 32 19 10 54 28 14 13 21 10 13 24 - 36 0 0 11 45 18 5 20 35 41 296 -46 13 4 21 10 26 14 13 45 28 9 45 5 - 35 0 0 11 16 54 5 20 30 40 296 -45 12 36 5 9 57 41 13 17 16 9 16 29 - 34 0 0 10 48 11 5 20 25 39 296 -44 12 7 31 9 28 51 12 48 46 8 47 34 - 33 0 0 10 19 12 5 20 20 38 297 -43 11 38 39 8 59 44 12 19 58 8 18 23 - 32 0 0 9 49 55 5 20 15 37 297 -42 11 9 30 8 30 20 11 50 52 7 48 55 - 31 0 0 9 20 23 5 20 11 36 297 -41 10 40 4 8 0 40 11 21 31 7 19 11 - 30 0 0 8 50 35 5 20 6 35 297 -40 10 10 23 7 30 45 10 51 53 6 49 13 - 29 0 0 8 20 31 5 20 2 34 297 -39 9 40 26 7 0 35 10 22 0 6 18 59 - 28 0 0 7 50 14 5 19 57 33 297 -38 9 10 16 6 30 11 9 51 52 5 48 32 - 27 0 0 7 19 43 5 19 53 32 297 -36 8 39 51 5 59 34 9 21 31 5 17 52 - 26 0 0 6 49 0 5 19 49 31 298 -35 8 9 13 5 28 45 8 50 56 4 47 0 - 25 0 0 6 18 4 5 19 45 29 298 -34 7 38 23 4 57 44 8 20 8 4 15 56 - 24 0 0 5 46 57 5 19 41 28 298 -33 7 7 21 4 26 32 7 49 9 3 44 41 - 23 0 0 5 15 39 5 19 37 27 298 -32 6 36 8 3 55 9 7 17 59 3 13 16 - 22 0 0 4 44 12 5 19 33 26 298 -31 6 4 45 3 23 38 6 46 38 2 41 42 - 21 0 0 4 12 36 5 19 30 25 298 -30 5 33 12 2 51 57 6 15 8 2 10 0 - 20 0 0 3 40 51 5 19 26 24 298 -29 5 1 32 2 20 9 5 43 29 1 38 9 - 19 0 0 3 8 59 5 19 23 23 298 -28 4 29 43 1 48 14 5 11 42 1 6 13 - 18 0 0 2 37 1 5 19 20 22 298 -26 3 57 48 1 16 13 4 39 48 0 34 10 - 17 0 0 2 4 57 5 19 17 21 298 -25 3 25 46 0 44 6 4 7 48 0 2 2 - 16 0 0 1 32 48 5 19 14 19 298 -24 2 53 40 0 11 55 3 35 42 - 0 30 10 - 15 0 0 1 0 36 5 19 11 18 298 -23 2 21 29 - 0 20 19 3 3 32 - 1 2 25 - 14 0 0 0 28 20 5 19 9 17 298 -22 1 49 15 - 0 52 36 2 31 19 - 1 34 42 - 13 0 0 - 0 3 57 5 19 7 16 298 -21 1 16 58 - 1 24 54 1 59 3 - 2 7 1 - 12 0 0 - 0 36 16 5 19 4 15 298 -20 0 44 40 - 1 57 13 1 26 45 - 2 39 21 - 11 0 0 - 1 8 35 5 19 2 14 298 -19 0 12 21 - 2 29 32 0 54 26 - 3 11 40 - 10 0 0 - 1 40 53 5 19 0 13 298 -18 - 0 19 58 - 3 1 50 0 22 7 - 3 43 57 - 9 0 0 - 2 13 10 5 18 59 12 298 -16 - 0 52 15 - 3 34 6 - 0 10 11 - 4 16 13 - 8 0 0 - 2 45 24 5 18 57 10 298 -15 - 1 24 31 - 4 6 19 - 0 42 27 - 4 48 25 - 7 0 0 - 3 17 35 5 18 56 9 298 -14 - 1 56 43 - 4 38 28 - 1 14 40 - 5 20 33 - 6 0 0 - 3 49 41 5 18 54 8 298 -13 - 2 28 52 - 5 10 32 - 1 46 50 - 5 52 37 - 5 0 0 - 4 21 43 5 18 53 7 298 -12 - 3 0 56 - 5 42 31 - 2 18 55 - 6 24 34 - 4 0 0 - 4 53 38 5 18 52 6 298 -11 - 3 32 54 - 6 14 23 - 2 50 54 - 6 56 25 - 3 0 0 - 5 25 26 5 18 52 5 298 -10 - 4 4 45 - 6 46 8 - 3 22 48 - 7 28 8 - 2 0 0 - 5 57 6 5 18 51 4 298 -9 - 4 36 29 - 7 17 44 - 3 54 33 - 7 59 42 - 1 0 0 - 6 28 37 5 18 51 3 298 -7 - 5 8 4 - 7 49 12 - 4 26 11 - 8 31 7 0 0 0 - 6 59 59 5 18 50 1 298 -6 - 5 39 30 - 8 20 29 - 4 57 39 - 9 2 22 1 0 0 - 7 31 10 5 18 50 0 297 -5 - 6 10 46 .. .. .. - 5 28 58 .. .. .. Uncertainty in time = +/- 4 secs Prediction of 2012 Dec 17.0 Data for the target star ------------------------ * name: UCAC2 41332819 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 43 24.8563 DE: +27 08 49.000 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .031, .035 ) * V mag [mag]: 12.0 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (87) Sylvia approx. diameter [km]: 263 approx. diameter ["]: .140 distance from Earth [AU]: 2.59200 * orbital information: orbit source: Preston date of fit: 2012 Dec 16 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 2231 number of rejected observations: 104 time covered by the observations: 1909 Apr 21 - 2012 Dec 11 1 sigma uncertainty ellipse (major, minor, PA): 0.012, 0.008, 78° remarks: * orbital elements for (87) Sylvia : Mean anomaly = 99.73328284 deg Arg. of pericenter = 265.15963194 deg Long. of node = 73.14300426 deg Inclination = 10.88635428 deg Eccentricity = 0.08792658 Semimajor axis = 3.49472347 AU Perihelion dist = 3.18744440 AU Mag: H = 6.71, G = 0.15 Epoch of elements : MJD 56283.22600000 TDT (2012 Dec 22.226) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 22 87 Sylvia 5h 25.9m UT 12.0 5 43 24.856 27 8 49.00UCAC2 41332819 0.0 12.0 263 17.4 2.592 -2.146 4.31 -86.7892 27.146 98.21 -23.43 5.4310 0.00014 -0.00003 -8.44557 1.26988 0.00049 -0.00039 2000 99.24659720121219.00000265.159632 73.143004 10.8863540.08792658 3.4947235 3.1874444 6.9 5.00.15 RATE 1.5086370 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.036 0.033 359 1.26 0.036 2 7 706 18 1356 0 3 0 056278.0020121222_332819 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Dec 16, 19:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org