IOTA/IOTA-ES occultation update for (2000) Herschel / TYC 3663-00140-1 event on 2008 Oct 10, 23:03 UT Visible from Russia, China, India Summary ------- On 2008 Oct 10 UT, the 19 km diameter asteroid (2000) Herschel will occult a 11.3 mag star in the constellation Cassiopeia for observers along a path across Russia, China, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.3 mag to 13.5 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: 15 * date and approx. time of event: 2008 Oct 10, 22:43 - 2008 Oct 10, 23:15 UT * magnitude of target star: 11.3 * magnitude drop [mag]: 2.3 * estimated maximum duration [s]: 3.7 * Moon: 83 % sunlit, 77° distance * Sun: 130° distance * rough path description: Russia, China, India The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 4.53 * 1 sigma uncertainty interval [seconds]: +/- 9.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .124 +/- .127) * 1 sigma uncertainty ellipse (major, minor, PA): ( .127", .124", 357° ) * approx speed of asteroid's shadow [km/s]: 5.0463 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 3663-00140-1 by 2000 Herschel on 2008 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 100 40 20 0 0 0 22 43 39 1 327 -5 100 46 42 100 33 58 101 44 36 ... .. .. 100 2 50 1 0 0 22 43 40 2 327 -6 100 9 11 99 56 30 101 6 51 ... .. .. Latitude Latitude Latitude Latitude 99 0 0 2 42 26 22 43 43 4 327 -7 2 52 50 2 32 3 4 27 59 .. .. .. 98 0 0 4 22 21 22 43 47 6 327 -8 4 32 55 4 11 48 6 9 39 2 37 7 97 0 0 6 4 13 22 43 53 8 327 -9 6 14 57 5 53 30 7 53 17 4 17 20 96 0 0 7 47 55 22 44 0 10 327 -11 7 58 50 7 37 2 9 38 44 5 59 24 95 0 0 9 33 19 22 44 9 12 327 -12 9 44 24 9 22 16 11 25 54 7 43 9 94 0 0 11 20 16 22 44 20 14 327 -13 11 31 31 11 9 3 13 14 38 9 28 28 93 0 0 13 8 36 22 44 32 16 326 -14 13 20 1 12 57 13 15 4 44 11 15 11 92 0 0 14 58 10 22 44 46 18 326 -15 15 9 45 14 46 37 16 56 4 13 3 8 91 0 0 16 48 46 22 45 2 20 326 -16 17 0 31 16 37 3 18 48 26 14 52 8 90 0 0 18 40 13 22 45 20 22 325 -17 18 52 8 18 28 20 20 41 39 16 42 1 89 0 0 20 32 19 22 45 39 24 325 -18 20 44 24 20 20 16 22 35 30 18 32 33 88 0 0 22 24 52 22 46 0 26 324 -19 22 37 6 22 12 39 24 29 46 20 23 34 87 0 0 24 17 39 22 46 22 28 324 -19 24 30 3 24 5 16 26 24 16 22 14 51 86 0 0 26 10 26 22 46 45 30 323 -20 26 23 0 25 57 55 28 18 45 24 6 11 85 0 0 28 3 2 22 47 10 32 322 -21 28 15 45 27 50 22 30 13 1 25 57 21 84 0 0 29 55 13 22 47 37 34 322 -22 30 8 5 29 42 23 32 6 49 27 48 8 83 0 0 31 46 45 22 48 4 36 321 -22 31 59 46 31 33 47 33 59 56 29 38 20 82 0 0 33 37 25 22 48 32 38 320 -23 33 50 34 33 24 19 35 52 8 31 27 44 81 0 0 35 27 1 22 49 2 40 319 -23 35 40 18 35 13 47 37 43 12 33 16 6 80 0 0 37 15 19 22 49 32 41 318 -24 37 28 44 37 1 58 39 32 54 35 3 16 79 0 0 39 2 7 22 50 2 43 317 -24 39 15 39 38 48 39 41 21 1 36 49 1 78 0 0 40 47 13 22 50 33 45 315 -24 41 0 52 40 33 39 43 7 19 38 33 9 77 0 0 42 30 25 22 51 5 47 314 -24 42 44 9 42 16 45 44 51 37 40 15 30 76 0 0 44 11 33 22 51 36 48 312 -25 44 25 22 43 57 47 46 33 42 41 55 52 75 0 0 45 50 25 22 52 8 50 311 -25 46 4 18 45 36 35 48 13 24 43 34 7 74 0 0 47 26 52 22 52 39 51 309 -25 47 40 49 47 12 59 49 50 31 45 10 5 73 0 0 49 0 45 22 53 11 53 307 -25 49 14 45 48 46 50 51 24 54 46 43 38 72 0 0 50 31 57 22 53 42 54 306 -25 50 45 58 50 18 1 52 56 25 48 14 39 71 0 0 52 0 21 22 54 12 55 304 -25 52 14 23 51 46 24 54 24 57 49 43 1 70 0 0 53 25 52 22 54 42 56 302 -25 53 39 53 53 11 55 55 50 23 51 8 40 69 0 0 54 48 24 22 55 12 58 299 -25 55 2 23 54 34 29 57 12 39 52 31 30 68 0 0 56 7 55 22 55 40 59 297 -25 56 21 52 55 54 3 58 31 42 53 51 29 67 0 0 57 24 23 22 56 8 60 295 -25 57 38 15 57 10 35 59 47 29 55 8 35 66 0 0 58 37 46 22 56 35 60 293 -24 58 51 34 58 24 3 61 0 0 56 22 45 65 0 0 59 48 5 22 57 2 61 290 -24 60 1 47 59 34 28 62 9 16 57 34 2 64 0 0 60 55 22 22 57 27 62 288 -24 61 8 56 60 41 51 63 15 18 58 42 24 63 0 0 61 59 38 22 57 51 63 285 -24 62 13 5 61 46 15 64 18 10 59 47 54 62 0 0 63 0 57 22 58 15 63 282 -24 63 14 15 62 47 43 65 17 56 60 50 34 61 0 0 63 59 22 22 58 37 64 280 -23 64 12 31 63 46 17 66 14 40 61 50 28 60 0 0 64 54 59 22 58 59 65 277 -23 65 7 58 64 42 4 67 8 29 62 47 39 59 0 0 65 47 53 22 59 20 65 275 -23 66 0 40 65 35 8 67 59 29 63 42 13 58 0 0 66 38 8 22 59 40 65 272 -23 66 50 45 66 25 35 68 47 46 64 34 13 57 0 0 67 25 52 22 59 59 66 269 -22 67 38 18 67 13 30 69 33 27 65 23 44 56 0 0 68 11 11 23 0 17 66 267 -22 68 23 24 67 59 0 70 16 40 66 10 53 55 0 0 68 54 10 23 0 34 66 264 -22 69 6 12 68 42 11 70 57 31 66 55 46 54 0 0 69 34 56 23 0 51 67 262 -22 69 46 46 69 23 10 71 36 9 67 38 26 53 0 0 70 13 36 23 1 7 67 259 -22 70 25 14 70 2 2 72 12 39 68 19 2 52 0 0 70 50 16 23 1 22 67 257 -21 71 1 42 70 38 54 72 47 10 68 57 37 51 0 0 71 25 3 23 1 36 67 254 -21 71 36 16 71 13 52 73 19 47 69 34 19 50 0 0 71 58 1 23 1 50 67 252 -21 72 9 2 71 47 2 73 50 37 70 9 11 49 0 0 72 29 17 23 2 3 67 250 -21 72 40 6 72 18 30 74 19 48 70 42 21 48 0 0 72 58 57 23 2 16 67 247 -21 73 9 34 72 48 22 74 47 24 71 13 53 47 0 0 73 27 6 23 2 28 67 245 -20 73 37 31 73 16 42 75 13 31 71 43 52 46 0 0 73 53 48 23 2 39 67 243 -20 74 4 3 73 43 36 75 38 14 72 12 23 45 0 0 74 19 10 23 2 50 67 241 -20 74 29 13 74 9 8 76 1 39 72 39 31 44 0 0 74 43 15 23 3 1 68 239 -20 74 53 7 74 33 24 76 23 51 73 5 20 43 0 0 75 6 8 23 3 11 68 237 -20 75 15 50 74 56 27 76 44 53 73 29 54 42 0 0 75 27 53 23 3 20 68 235 -19 75 37 24 75 18 22 77 4 51 73 53 18 41 0 0 75 48 33 23 3 30 67 233 -19 75 57 55 75 39 13 77 23 47 74 15 35 40 0 0 76 8 13 23 3 39 67 231 -19 76 17 25 75 59 2 77 41 46 74 36 49 39 0 0 76 26 56 23 3 47 67 229 -19 76 35 59 76 17 55 77 58 51 74 57 3 38 0 0 76 44 45 23 3 55 67 227 -19 76 53 38 76 35 53 78 15 5 75 16 20 37 0 0 77 1 43 23 4 3 67 225 -19 77 10 28 76 53 0 78 30 31 75 34 44 36 0 0 77 17 53 23 4 11 67 223 -19 77 26 29 77 9 18 78 45 12 75 52 17 35 0 0 77 33 17 23 4 18 67 222 -18 77 41 45 77 24 51 78 59 11 76 9 1 34 0 0 77 47 59 23 4 25 67 220 -18 77 56 19 77 39 40 79 12 30 76 25 1 33 0 0 78 2 0 23 4 32 67 218 -18 78 10 12 77 53 48 79 25 11 76 40 17 32 0 0 78 15 22 23 4 39 67 216 -18 78 23 26 78 7 18 79 37 16 76 54 51 31 0 0 78 28 8 23 4 45 67 215 -18 78 36 5 78 20 11 79 48 47 77 8 47 30 0 0 78 40 19 23 4 51 67 213 -18 78 48 9 78 32 29 79 59 47 77 22 6 29 0 0 78 51 57 23 4 57 67 212 -18 78 59 41 78 44 14 80 10 16 77 34 50 28 0 0 79 3 4 23 5 3 67 210 -17 79 10 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82 4 21 81 52 45 82 57 7 81 0 24 - 2 0 0 82 1 13 23 7 5 65 169 -15 82 6 59 81 55 27 82 59 29 81 3 22 - 3 0 0 82 3 43 23 7 9 65 168 -15 82 9 28 81 57 59 83 1 43 81 6 9 - 4 0 0 82 6 5 23 7 12 65 166 -15 82 11 48 82 0 22 83 3 48 81 8 46 - 5 0 0 82 8 17 23 7 15 65 165 -15 82 13 59 82 2 35 83 5 46 81 11 13 - 6 0 0 82 10 20 23 7 18 65 164 -15 82 16 1 82 4 40 83 7 35 81 13 30 - 7 0 0 82 12 15 23 7 21 64 163 -15 82 17 54 82 6 36 83 9 17 81 15 37 - 8 0 0 82 14 1 23 7 24 64 161 -14 82 19 39 82 8 23 83 10 51 81 17 34 - 9 0 0 82 15 38 23 7 27 64 160 -14 82 21 15 82 10 2 83 12 17 81 19 23 - 10 0 0 82 17 7 23 7 29 64 159 -14 82 22 43 82 11 32 83 13 36 81 21 2 - 11 0 0 82 18 28 23 7 32 64 158 -14 82 24 3 82 12 54 83 14 48 81 22 32 - 12 0 0 82 19 41 23 7 35 64 156 -14 82 25 15 82 14 8 83 15 53 81 23 53 - 13 0 0 82 20 46 23 7 38 64 155 -14 82 26 20 82 15 13 83 16 50 81 25 5 - 14 0 0 82 21 43 23 7 41 64 154 -14 82 27 16 82 16 11 83 17 41 81 26 8 - 15 0 0 82 22 32 23 7 44 64 153 -14 82 28 5 82 17 1 83 18 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83 16 40 81 24 54 - 30 0 0 82 19 29 23 8 26 63 135 -13 82 25 3 82 13 55 83 15 41 81 23 40 - 31 0 0 82 18 15 23 8 29 63 134 -13 82 23 50 82 12 40 83 14 35 81 22 18 - 32 0 0 82 16 52 23 8 32 63 132 -13 82 22 28 82 11 17 83 13 21 81 20 46 - 33 0 0 82 15 22 23 8 35 63 131 -13 82 20 58 82 9 45 83 12 1 81 19 6 - 34 0 0 82 13 43 23 8 37 63 130 -13 82 19 20 82 8 5 83 10 33 81 17 16 - 35 0 0 82 11 55 23 8 40 62 129 -13 82 17 34 82 6 16 83 8 58 81 15 17 - 36 0 0 82 9 59 23 8 43 62 128 -13 82 15 39 82 4 19 83 7 14 81 13 8 - 37 0 0 82 7 54 23 8 46 62 126 -12 82 13 36 82 2 13 83 5 23 81 10 49 - 38 0 0 82 5 40 23 8 49 62 125 -12 82 11 23 81 59 57 83 3 24 81 8 21 - 39 0 0 82 3 17 23 8 52 62 124 -12 82 9 2 81 57 33 83 1 17 81 5 42 - 40 0 0 82 0 45 23 8 55 62 123 -12 82 6 31 81 54 59 82 59 2 81 2 54 - 41 0 0 81 58 3 23 8 58 62 122 -12 82 3 51 81 52 15 82 56 38 80 59 54 - 42 0 0 81 55 11 23 9 1 62 121 -12 82 1 1 81 49 21 82 54 6 80 56 44 - 43 0 0 81 52 9 23 9 5 62 119 -12 81 58 1 81 46 18 82 51 24 80 53 22 - 44 0 0 81 48 57 23 9 8 62 118 -12 81 54 51 81 43 3 82 48 33 80 49 50 - 45 0 0 81 45 35 23 9 11 62 117 -12 81 51 31 81 39 38 82 45 33 80 46 5 - 46 0 0 81 42 1 23 9 14 61 116 -12 81 48 0 81 36 3 82 42 23 80 42 9 - 47 0 0 81 38 16 23 9 17 61 115 -12 81 44 17 81 32 15 82 39 3 80 38 0 - 48 0 0 81 34 20 23 9 21 61 113 -12 81 40 23 81 28 16 82 35 33 80 33 38 - 49 0 0 81 30 12 23 9 24 61 112 -11 81 36 18 81 24 6 82 31 51 80 29 4 - 50 0 0 81 25 51 23 9 28 61 111 -11 81 32 0 81 19 42 82 27 59 80 24 15 - 51 0 0 81 21 17 23 9 31 61 110 -11 81 27 30 81 15 6 82 23 56 80 19 13 - 52 0 0 81 16 31 23 9 35 61 109 -11 81 22 46 81 10 16 82 19 41 80 13 56 - 53 0 0 81 11 31 23 9 38 61 107 -11 81 17 49 81 5 13 82 15 13 80 8 25 - 54 0 0 81 6 16 23 9 42 61 106 -11 81 12 38 80 59 55 82 10 33 80 2 37 - 55 0 0 81 0 47 23 9 46 60 105 -11 81 7 12 80 54 22 82 5 39 79 56 34 - 56 0 0 80 55 3 23 9 49 60 104 -11 81 1 31 80 48 34 82 0 32 79 50 14 - 57 0 0 80 49 2 23 9 53 60 103 -11 80 55 35 80 42 30 81 55 10 79 43 36 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78 37 49 23 11 3 58 84 -9 78 45 40 78 29 58 79 57 26 77 19 29 - 73 0 0 78 25 29 23 11 9 57 83 -9 78 33 27 78 17 31 79 46 18 77 6 0 - 74 0 0 78 12 34 23 11 15 57 82 -8 78 20 40 78 4 29 79 34 38 76 51 54 - 75 0 0 77 59 2 23 11 21 57 80 -8 78 7 15 77 50 49 79 22 24 76 37 8 - 76 0 0 77 44 50 23 11 27 57 79 -8 77 53 11 77 36 30 79 9 33 76 21 41 - 77 0 0 77 29 57 23 11 33 57 78 -8 77 38 26 77 21 29 78 56 4 76 5 29 - 78 0 0 77 14 20 23 11 40 56 77 -8 77 22 57 77 5 43 78 41 53 75 48 30 - 79 0 0 76 57 56 23 11 47 56 75 -7 77 6 42 76 49 11 78 27 0 75 30 42 - 80 0 0 76 40 43 23 11 54 56 74 -7 76 49 38 76 31 49 78 11 20 75 12 2 - 81 0 0 76 22 38 23 12 2 55 73 -7 76 31 42 76 13 35 77 54 51 74 52 27 - 82 0 0 76 3 37 23 12 9 55 72 -7 76 12 51 75 54 25 77 37 30 74 31 53 - 83 0 0 75 43 38 23 12 17 55 70 -6 75 53 2 75 34 16 77 19 14 74 10 18 - 84 0 0 75 22 36 23 12 26 54 69 -6 75 32 10 75 13 4 76 59 58 73 47 38 - 85 0 0 75 0 29 23 12 34 54 68 -6 75 10 13 74 50 46 76 39 40 73 23 49 - 86 0 0 74 37 10 23 12 43 54 67 -6 74 47 6 74 27 17 76 18 15 72 58 46 - 87 0 0 74 12 37 23 12 53 53 65 -5 74 22 44 74 2 33 75 55 39 72 32 26 - 88 0 0 73 46 45 23 13 2 53 64 -5 73 57 3 73 36 29 75 31 46 72 4 45 - 89 0 0 73 19 29 23 13 12 52 63 -5 73 29 58 73 9 1 75 6 32 71 35 36 - 90 0 0 72 50 43 23 13 23 52 61 -4 73 1 24 72 40 3 74 39 51 71 4 55 - 91 0 0 72 20 22 23 13 34 51 60 -4 72 31 15 72 9 30 74 11 38 70 32 38 - 92 0 0 71 48 20 23 13 45 51 59 -4 71 59 26 71 37 16 73 41 47 69 58 37 - 93 0 0 71 14 30 23 13 57 50 57 -3 71 25 49 71 3 14 73 10 11 69 22 48 - 94 0 0 70 38 48 23 14 9 50 56 -3 70 50 19 70 27 19 72 36 43 68 45 4 - 95 0 0 70 1 5 23 14 22 49 55 -2 70 12 49 69 49 23 72 1 16 68 5 19 - 96 0 0 69 21 15 23 14 36 49 54 -2 69 33 12 69 9 20 71 23 42 67 23 26 - 97 0 0 68 39 10 23 14 49 48 52 -1 68 51 20 68 27 3 70 43 54 66 39 19 - 98 0 0 67 54 44 23 15 4 47 51 -1 68 7 7 67 42 24 70 1 44 65 52 51 - 99 0 0 67 7 48 23 15 19 46 50 0 67 20 24 66 55 16 69 17 4 65 3 55 Uncertainty in time = +/- 17 secs [Prediction of 2008 Oct 1.0] Data for the target star ------------------------ * name: TYC 3663-00140-1 * constellation : Cassiopeia * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 00 52 38.2122 DE: +57 15 50.257 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .109, .121 ) * V mag [mag]: 11.3 * B mag [mag]: 12.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2000) Herschel approx. diameter [km]: 19 approx. diameter ["]: .028 distance from Earth [AU]: 0.93600 * orbital information: orbit source: Preston date of fit: 2008 Sep 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 530 number of rejected observations: 8 time covered by the observations: 1934 Jul 12 - 2008 Sep 18 1 sigma uncertainty ellipse (major, minor, PA): 0.061, 0.041, 61° remarks: * orbital elements for (2000) Herschel : Mean anomaly = 340.80277508 deg Arg. of pericenter = 130.20272122 deg Long. of node = 292.10141539 deg Inclination = 22.78937626 deg Eccentricity = 0.29675335 Semimajor axis = 2.38078929 AU Perihelion dist = 1.67428208 AU Mag: H = 11.08, G = 0.15 Epoch of elements : MJD 54749.96100000 TDT (2008 Oct 10.961) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Oct 10 2000 Herschel 23h 3.2m UT 11.3 0 52 38.212 57 15 50.26TYC 3663-00140-1 12.3 13.5 19 3.7 0.936 -3.028 10.63 7.4424 57.262 -169.10 -7.07 23.0533 0.14866 0.34344 -2.61243 1.13488 0.00031 -0.00376 2000 338.130227200810 1.00000130.202721292.101415 22.7893760.29675335 2.3807893 1.674282111.3 5.00.15 RATE 2.6830120 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.127 0.124 357 5.53 0.127 0 54740.5020081010_0140-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 01, 04:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org