IOTA/IOTA-ES occultation update for (519) Sylvania / TYC 0870-00231-1 event on 2008 Jan 03, 07:09 UT Visible from Venezuela, Colombia, Ecuador Summary ------- On 2008 Jan 03 UT, the 48 km diameter asteroid (519) Sylvania will occult a 11.3 mag star in the constellation Leo for observers along a path across Venezuela, Colombia, Ecuador. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.5 mag to 14.8 mag (the magnitude of the asteroid) for at most 9.5 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: 2008 Jan 03, 06:48 - 2008 Jan 03, 07:29 UT * midpoint of event [JD]: 2454468.797875 * magnitude of target star: 11.3 * magnitude drop [mag]: 3.5 * estimated maximum duration [s]: 9.5 * Moon: 23 % sunlit, 57° distance * Sun: 111° distance * rough path description: Venezuela, Colombia, Ecuador The occultation path -------------------- * approximate projected width [km]: 50 * 1 sigma uncertainty interval [path widths]: +/- 0.99 * 1 sigma uncertainty interval [seconds]: +/- 9.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .024 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .024", .023", 106° ) * approx speed of asteroid's shadow [km/s]: 5.0770 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0870-00231-1 by 519 Sylvania on 2008 Jan 03 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 -114 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -13 53 12 -113 0 0 -14 18 59 6 48 43 1 75 -51 -14 33 3 -14 4 54 .. .. .. -13 36 59 -112 0 0 -14 2 16 6 48 44 2 74 -52 -14 16 22 -13 48 9 .. .. .. -13 20 8 -111 0 0 -13 44 56 6 48 45 3 74 -52 -13 59 5 -13 30 46 -14 27 2 -13 2 40 -110 0 0 -13 26 59 6 48 46 4 74 -53 -13 41 10 -13 12 46 -14 9 12 -12 44 35 -109 0 0 -13 8 24 6 48 48 5 74 -53 -13 22 38 -12 54 9 -13 50 45 -12 25 52 -108 0 0 -12 49 11 6 48 50 6 73 -54 -13 3 28 -12 34 53 -13 31 41 -12 6 31 -107 0 0 -12 29 20 6 48 53 7 73 -54 -12 43 40 -12 14 59 -13 11 59 -11 46 31 -106 0 0 -12 8 51 6 48 56 8 73 -55 -12 23 14 -11 54 27 -12 51 39 -11 25 54 -105 0 0 -11 47 44 6 48 59 9 73 -55 -12 2 10 -11 33 17 -12 30 40 -11 4 37 -104 0 0 -11 25 58 6 49 3 10 73 -56 -11 40 27 -11 11 28 -12 9 4 -10 42 42 -103 0 0 -11 3 33 6 49 8 11 72 -56 -11 18 5 -10 49 0 -11 46 48 -10 20 7 -102 0 0 -10 40 29 6 49 13 12 72 -57 -10 55 5 -10 25 53 -11 23 54 - 9 56 53 -101 0 0 -10 16 46 6 49 18 13 72 -57 -10 31 25 -10 2 6 -11 0 21 - 9 33 0 -100 0 0 - 9 52 24 6 49 24 14 72 -57 -10 7 6 - 9 37 41 -10 36 9 - 9 8 28 - 99 0 0 - 9 27 22 6 49 30 16 72 -58 - 9 42 8 - 9 12 35 -10 11 18 - 8 43 16 - 98 0 0 - 9 1 41 6 49 37 17 72 -58 - 9 16 30 - 8 46 51 - 9 45 47 - 8 17 24 - 97 0 0 - 8 35 21 6 49 45 18 71 -58 - 8 50 13 - 8 20 26 - 9 19 37 - 7 50 52 - 96 0 0 - 8 8 20 6 49 53 19 71 -59 - 8 23 17 - 7 53 22 - 8 52 48 - 7 23 41 - 95 0 0 - 7 40 40 6 50 1 20 71 -59 - 7 55 40 - 7 25 39 - 8 25 19 - 6 55 49 - 94 0 0 - 7 12 21 6 50 10 21 71 -59 - 7 27 25 - 6 57 15 - 7 57 11 - 6 27 18 - 93 0 0 - 6 43 21 6 50 20 22 71 -59 - 6 58 29 - 6 28 12 - 7 28 23 - 5 58 8 - 92 0 0 - 6 13 43 6 50 30 23 71 -59 - 6 28 54 - 5 58 30 - 6 58 56 - 5 28 17 - 91 0 0 - 5 43 25 6 50 40 25 71 -60 - 5 58 40 - 5 28 8 - 6 28 49 - 4 57 47 - 90 0 0 - 5 12 27 6 50 52 26 71 -60 - 5 27 47 - 4 57 6 - 5 58 4 - 4 26 38 - 89 0 0 - 4 40 51 6 51 3 27 71 -60 - 4 56 15 - 4 25 26 - 5 26 40 - 3 54 50 - 88 0 0 - 4 8 36 6 51 16 28 71 -60 - 4 24 4 - 3 53 7 - 4 54 36 - 3 22 23 - 87 0 0 - 3 35 43 6 51 28 29 71 -60 - 3 51 15 - 3 20 10 - 4 21 55 - 2 49 17 - 86 0 0 - 3 2 11 6 51 42 30 71 -60 - 3 17 47 - 2 46 34 - 3 48 36 - 2 15 34 - 85 0 0 - 2 28 2 6 51 56 32 71 -60 - 2 43 42 - 2 12 21 - 3 14 39 - 1 41 12 - 84 0 0 - 1 53 16 6 52 10 33 71 -60 - 2 9 0 - 1 37 31 - 2 40 5 - 1 6 14 - 83 0 0 - 1 17 53 6 52 25 34 71 -60 - 1 33 41 - 1 2 4 - 2 4 54 - 0 30 39 - 82 0 0 - 0 41 55 6 52 41 35 71 -59 - 0 57 47 - 0 26 1 - 1 29 7 0 5 32 - 81 0 0 - 0 5 21 6 52 57 36 72 -59 - 0 21 17 0 10 37 - 0 52 45 0 42 18 - 80 0 0 0 31 47 6 53 14 38 72 -59 0 15 47 0 47 49 - 0 15 49 1 19 38 - 79 0 0 1 9 29 6 53 32 39 72 -59 0 53 25 1 25 35 0 21 42 1 57 32 - 78 0 0 1 47 44 6 53 50 40 72 -58 1 31 36 2 3 54 0 59 45 2 35 58 - 77 0 0 2 26 30 6 54 8 41 72 -58 2 10 19 2 42 44 1 38 20 3 14 56 - 76 0 0 3 5 47 6 54 27 42 73 -58 2 49 32 3 22 4 2 17 26 3 54 24 - 75 0 0 3 45 34 6 54 47 44 73 -57 3 29 15 4 1 54 2 57 1 4 34 21 - 74 0 0 4 25 48 6 55 7 45 74 -57 4 9 26 4 42 13 3 37 5 5 14 46 - 73 0 0 5 6 30 6 55 27 46 74 -56 4 50 4 5 22 57 4 17 36 5 55 38 - 72 0 0 5 47 37 6 55 48 47 74 -56 5 31 7 6 4 8 4 58 33 6 36 55 - 71 0 0 6 29 7 6 56 10 49 75 -55 6 12 35 6 45 42 5 39 55 7 18 35 - 70 0 0 7 11 1 6 56 32 50 76 -55 6 54 25 7 27 38 6 21 39 8 0 37 - 69 0 0 7 53 14 6 56 55 51 76 -54 7 36 36 8 9 54 7 3 44 8 43 0 - 68 0 0 8 35 47 6 57 18 52 77 -53 8 19 6 8 52 30 7 46 9 9 25 41 - 67 0 0 9 18 37 6 57 41 53 78 -53 9 1 53 9 35 22 8 28 51 10 8 38 - 66 0 0 10 1 42 6 58 5 55 79 -52 9 44 56 10 18 30 9 11 49 10 51 50 - 65 0 0 10 45 1 6 58 29 56 79 -51 10 28 12 11 1 51 9 55 1 11 35 15 - 64 0 0 11 28 30 6 58 54 57 80 -51 11 11 40 11 45 22 10 38 25 12 18 51 - 63 0 0 12 12 10 6 59 19 58 82 -50 11 55 18 12 29 3 11 21 59 13 2 35 - 62 0 0 12 55 56 6 59 44 59 83 -49 12 39 2 13 12 51 12 5 41 13 46 26 - 61 0 0 13 39 47 7 0 9 61 84 -48 13 22 53 13 56 44 12 49 28 14 30 22 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124 -36 24 7 4 24 40 37 23 33 56 25 13 56 - 45 0 0 25 4 20 7 7 15 74 128 -35 24 47 37 25 21 5 24 14 34 25 54 19 - 44 0 0 25 44 23 7 7 41 75 133 -34 25 27 42 26 1 5 24 54 44 26 34 14 - 43 0 0 26 23 55 7 8 7 75 138 -33 26 7 17 26 40 35 25 34 25 27 13 38 - 42 0 0 27 2 58 7 8 33 75 143 -32 26 46 23 27 19 34 26 13 36 27 52 32 - 41 0 0 27 41 28 7 8 59 75 148 -31 27 24 56 27 58 1 26 52 16 28 30 53 - 40 0 0 28 19 25 7 9 24 75 153 -31 28 2 57 28 35 56 27 30 22 29 8 40 - 39 0 0 28 56 49 7 9 50 75 157 -30 28 40 23 29 13 15 28 7 56 29 45 53 - 38 0 0 29 33 37 7 10 15 74 162 -29 29 17 15 29 50 0 28 44 55 30 22 31 - 37 0 0 30 9 50 7 10 39 74 166 -28 29 53 31 30 26 9 29 21 18 30 58 33 - 36 0 0 30 45 26 7 11 4 74 171 -27 30 29 11 31 1 42 29 57 5 31 33 58 - 35 0 0 31 20 25 7 11 28 73 175 -27 31 4 14 31 36 37 30 32 16 32 8 45 - 34 0 0 31 54 46 7 11 52 73 179 -26 31 38 39 32 10 54 31 6 49 32 42 55 - 33 0 0 32 28 29 7 12 15 72 182 -25 32 12 27 32 44 34 31 40 44 33 16 26 - 32 0 0 33 1 34 7 12 39 72 185 -24 32 45 35 33 17 34 32 14 0 33 49 18 - 31 0 0 33 34 0 7 13 1 71 189 -23 33 18 5 33 49 56 32 46 38 34 21 32 - 30 0 0 34 5 46 7 13 24 70 191 -23 33 49 56 34 21 38 33 18 37 34 53 6 - 29 0 0 34 36 53 7 13 46 70 194 -22 34 21 7 34 52 41 33 49 57 35 24 1 - 28 0 0 35 7 21 7 14 8 69 197 -21 34 51 39 35 23 4 34 20 37 35 54 16 - 27 0 0 35 37 9 7 14 30 68 199 -20 35 21 31 35 52 48 34 50 37 36 23 51 - 26 0 0 36 6 18 7 14 51 67 201 -20 35 50 44 36 21 52 35 19 58 36 52 47 - 25 0 0 36 34 46 7 15 12 67 204 -19 36 19 17 36 50 17 35 48 40 37 21 3 - 24 0 0 37 2 36 7 15 32 66 206 -18 36 47 11 37 18 2 36 16 41 37 48 40 - 23 0 0 37 29 46 7 15 52 65 208 -17 37 14 25 37 45 8 36 44 4 38 15 37 - 22 0 0 37 56 17 7 16 12 64 209 -17 37 41 0 38 11 35 37 10 47 38 41 56 - 21 0 0 38 22 8 7 16 31 63 211 -16 38 6 56 38 37 22 37 36 51 39 7 35 - 20 0 0 38 47 21 7 16 50 63 213 -15 38 32 13 39 2 31 38 2 16 39 32 35 - 19 0 0 39 11 56 7 17 9 62 214 -15 38 56 51 39 27 1 38 27 3 39 56 58 - 18 0 0 39 35 52 7 17 28 61 216 -14 39 20 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44 49 33 - 3 0 0 44 22 15 7 21 26 49 234 -5 44 8 7 44 36 24 43 40 10 45 4 28 - 2 0 0 44 36 47 7 21 40 49 235 -4 44 22 42 44 50 54 43 54 50 45 18 52 - 1 0 0 44 50 48 7 21 53 48 236 -4 44 36 45 45 4 51 44 8 59 45 32 44 0 0 0 45 4 16 7 22 6 47 237 -3 44 50 16 45 18 17 44 22 35 45 46 5 1 0 0 45 17 14 7 22 19 46 238 -3 45 3 16 45 31 12 44 35 40 45 58 55 2 0 0 45 29 40 7 22 31 46 239 -2 45 15 45 45 43 36 44 48 14 46 11 14 3 0 0 45 41 36 7 22 44 45 240 -2 45 27 44 45 55 30 45 0 17 46 23 3 4 0 0 45 53 2 7 22 56 44 241 -1 45 39 12 46 6 53 45 11 50 46 34 22 5 0 0 46 3 58 7 23 8 43 242 -1 45 50 10 46 17 47 45 22 52 46 45 11 6 0 0 46 14 25 7 23 19 43 243 0 46 0 38 46 28 12 45 33 25 46 55 32 7 0 0 46 24 22 7 23 30 42 244 0 46 10 38 46 38 7 45 43 28 47 5 23 8 0 0 46 33 50 7 23 42 41 245 1 46 20 8 46 47 33 45 53 2 47 14 45 9 0 0 46 42 49 7 23 53 40 245 1 46 29 9 46 56 31 46 2 7 47 23 39 10 0 0 46 51 21 7 24 3 40 246 2 46 37 42 47 5 0 46 10 43 47 32 6 11 0 0 46 59 24 7 24 14 39 247 2 46 45 47 47 13 2 46 18 51 47 40 4 12 0 0 47 6 59 7 24 24 38 248 3 46 53 23 47 20 35 46 26 31 47 47 35 13 0 0 47 14 7 7 24 34 38 249 3 47 0 32 47 27 42 46 33 43 47 54 38 14 0 0 47 20 47 7 24 44 37 250 4 47 7 14 47 34 21 46 40 27 48 1 14 15 0 0 47 27 0 7 24 54 36 251 4 47 13 28 47 40 32 46 46 44 48 7 24 16 0 0 47 32 46 7 25 3 36 252 5 47 19 16 47 46 17 46 52 33 48 13 6 17 0 0 47 38 5 7 25 12 35 252 5 47 24 36 47 51 36 46 57 56 48 18 23 18 0 0 47 42 58 7 25 21 34 253 6 47 29 30 47 56 28 47 2 51 48 23 13 19 0 0 47 47 25 7 25 30 33 254 6 47 33 57 48 0 53 47 7 20 48 27 37 20 0 0 47 51 25 7 25 39 33 255 7 47 37 58 48 4 53 47 11 23 48 31 35 21 0 0 47 54 59 7 25 48 32 256 7 47 41 33 48 8 26 47 14 59 48 35 7 22 0 0 47 58 8 7 25 56 31 257 7 47 44 42 48 11 34 47 18 9 48 38 14 23 0 0 48 0 50 7 26 4 31 257 8 47 47 25 48 14 16 47 20 53 48 40 55 24 0 0 48 3 7 7 26 12 30 258 8 47 49 42 48 16 33 47 23 11 48 43 11 25 0 0 48 4 58 7 26 20 29 259 9 47 51 34 48 18 24 47 25 3 48 45 1 26 0 0 48 6 24 7 26 27 29 260 9 47 53 0 48 19 50 47 26 29 48 46 26 27 0 0 48 7 25 7 26 35 28 261 10 47 54 0 48 20 50 47 27 30 48 47 27 28 0 0 48 8 0 7 26 42 27 262 10 47 54 36 48 21 25 47 28 6 48 48 2 29 0 0 48 8 10 7 26 49 27 262 10 47 54 46 48 21 35 47 28 15 48 48 12 30 0 0 48 7 55 7 26 56 26 263 11 47 54 30 48 21 20 47 28 0 48 47 57 31 0 0 48 7 15 7 27 3 25 264 11 47 53 50 48 20 40 47 27 19 48 47 18 32 0 0 48 6 9 7 27 10 25 265 12 47 52 44 48 19 35 47 26 12 48 46 14 33 0 0 48 4 39 7 27 16 24 266 12 47 51 13 48 18 5 47 24 41 48 44 45 34 0 0 48 2 44 7 27 22 23 266 13 47 49 17 48 16 11 47 22 44 48 42 51 35 0 0 48 0 23 7 27 28 23 267 13 47 46 56 48 13 51 47 20 21 48 40 32 36 0 0 47 57 38 7 27 34 22 268 13 47 44 10 48 11 6 47 17 34 48 37 49 37 0 0 47 54 27 7 27 40 21 269 14 47 40 59 48 7 56 47 14 21 48 34 41 38 0 0 47 50 51 7 27 46 20 270 14 47 37 22 48 4 21 47 10 43 48 31 8 39 0 0 47 46 51 7 27 51 20 270 15 47 33 21 48 0 22 47 6 39 48 27 10 40 0 0 47 42 25 7 27 56 19 271 15 47 28 54 47 55 57 47 2 10 48 22 47 41 0 0 47 37 34 7 28 1 18 272 15 47 24 2 47 51 7 46 57 16 48 17 59 42 0 0 47 32 17 7 28 6 18 273 16 47 18 44 47 45 52 46 51 56 48 12 47 43 0 0 47 26 36 7 28 11 17 273 16 47 13 1 47 40 11 46 46 11 48 7 9 44 0 0 47 20 29 7 28 16 16 274 16 47 6 53 47 34 6 46 40 0 48 1 6 45 0 0 47 13 56 7 28 20 16 275 17 47 0 19 47 27 35 46 33 23 47 54 38 46 0 0 47 6 58 7 28 24 15 276 17 46 53 19 47 20 38 46 26 20 47 47 44 47 0 0 46 59 35 7 28 28 14 276 18 46 45 54 47 13 16 46 18 52 47 40 25 48 0 0 46 51 45 7 28 32 14 277 18 46 38 3 47 5 28 46 10 57 47 32 41 49 0 0 46 43 30 7 28 36 13 278 18 46 29 46 46 57 15 46 2 37 47 24 31 50 0 0 46 34 49 7 28 39 12 279 19 46 21 3 46 48 35 45 53 50 47 15 55 51 0 0 46 25 41 7 28 43 11 279 19 46 11 54 46 39 30 45 44 38 47 6 53 52 0 0 46 16 8 7 28 46 11 280 19 46 2 18 46 29 58 45 34 58 46 57 26 53 0 0 46 6 8 7 28 49 10 281 20 45 52 16 46 20 1 45 24 52 46 47 32 54 0 0 45 55 42 7 28 51 9 282 20 45 41 48 46 9 36 45 14 20 46 37 12 55 0 0 45 44 49 7 28 54 9 282 20 45 30 53 45 58 46 45 3 21 46 26 25 56 0 0 45 33 29 7 28 56 8 283 21 45 19 31 45 47 28 44 51 55 46 15 12 57 0 0 45 21 43 7 28 59 7 284 21 45 7 42 45 35 44 44 40 1 46 3 33 58 0 0 45 9 29 7 29 1 6 285 21 44 55 27 45 23 33 44 27 41 45 51 26 59 0 0 44 56 49 7 29 2 6 285 22 44 42 44 45 10 55 44 14 53 45 38 53 60 0 0 44 43 41 7 29 4 5 286 22 44 29 33 44 57 49 44 1 38 45 25 52 61 0 0 44 30 6 7 29 5 4 287 22 44 15 56 44 44 17 43 47 56 45 12 24 62 0 0 44 16 3 7 29 6 3 287 23 44 1 50 44 30 16 43 33 45 44 58 29 63 0 0 44 1 32 7 29 7 3 288 23 43 47 17 44 15 48 43 19 7 44 44 6 64 0 0 43 46 34 7 29 8 2 289 23 43 32 16 44 0 53 43 4 1 44 29 16 65 0 0 43 31 8 7 29 8 1 289 24 43 16 47 43 45 29 42 48 27 44 13 58 66 0 0 43 15 13 7 29 8 0 290 24 43 0 50 43 29 37 .. .. .. 43 58 11 Data for the target star ------------------------ * name: TYC 0870-00231-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 11 46 26.0692 DE: +14 45 48.762 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .018, .019 ) * V mag [mag]: 11.3 * B mag [mag]: 11.8 * Apparent position with proper motion RA(deg): 176.7161418053 DE(deg): 14.7163197808 * Equation of equinoxes (radians) : 0.000038719639917 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (519) Sylvania approx. diameter [km]: 48 approx. diameter ["]: .024 distance from Earth [AU]: 2.80900 * orbital information: orbit source: Preston date of fit: 2007 Nov 21 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 794 number of rejected observations: 77 time covered by the observations: 1903 Nov 14 - 2007 Oct 20 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.014, 124° remarks: * orbital elements for (519) Sylvania : Mean anomaly = 160.46026695 deg Arg. of pericenter = 303.04518616 deg Long. of node = 44.79912187 deg Inclination = 11.01529994 deg Eccentricity = 0.18627779 Semimajor axis = 2.78920529 AU Perihelion dist = 2.26963829 AU Mag: H = 8.81, G = 0.15 Epoch of elements : MJD 54468.29800000 TDT (2008 Jan 03.298) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 03 519 Sylvania 7h 8.9m UT 11.3 11 46 26.069 14 45 48.76TYC 0870-00231-1 11.8 14.8 48 9.5 2.809 0.535 4.48 -32.921 14.762 73.81 -22.87 7.1490 -.12779 .22294 2.48469 1.42754 -0.00537 0.00189 2000 158.70454020071226.00000303.045186 44.799122 11.0153000.186277792.789205292.269638299.145 0.15 RATE 2.1158430 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.024 0.023 105.9 1.990 0.024 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Nov 24, 17:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org