IOTA/IOTA-ES occultation update for (65) Cybele / UCAC2 24879439 event on 2008 Jul 07, 19:03 UT Visible from SE Asia, India, Africa Summary ------- On 2008 Jul 07 UT, the 237 km diameter asteroid (65) Cybele will occult a 11.5 mag star in the constellation Ophiuchus for observers along a path across SE Asia, India, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 11.4 mag (the magnitude of the asteroid) for at most 26.9 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: 72 * date and approx. time of event: 2008 Jul 07, 18:52 - 2008 Jul 07, 19:13 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 26.9 * Moon: 26 % sunlit, 93° distance * Sun: 154° distance * rough path description: SE Asia, India, Africa The occultation path -------------------- * approximate projected width [km]: 256 * 1 sigma uncertainty interval [path widths]: +/- 0.80 * 1 sigma uncertainty interval [seconds]: +/- 20.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .123 +/- .122) * 1 sigma uncertainty ellipse (major, minor, PA): ( .123", .122", 90° ) * approx speed of asteroid's shadow [km/s]: 8.8235 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 24879439 by 65 Cybele on 2008 Jul 7 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 - 13 0 0 9 40 52 19 13 19 26 116 0 10 53 16 8 29 8 12 50 36 6 35 36 - 12 0 0 9 26 5 19 13 13 27 116 -1 10 38 23 8 14 26 12 35 34 6 21 2 - 11 0 0 9 11 34 19 13 7 28 116 -2 10 23 47 8 0 0 12 20 49 6 6 44 - 10 0 0 8 57 19 19 13 1 29 117 -3 10 9 27 7 45 51 12 6 20 5 52 43 - 9 0 0 8 43 22 19 12 54 30 117 -4 9 55 24 7 31 58 11 52 9 5 38 58 - 8 0 0 8 29 41 19 12 48 31 117 -5 9 41 39 7 18 23 11 38 14 5 25 30 - 7 0 0 8 16 18 19 12 41 32 118 -6 9 28 10 7 5 4 11 24 37 5 12 20 - 6 0 0 8 3 12 19 12 33 32 118 -7 9 14 59 6 52 3 11 11 18 4 59 26 - 5 0 0 7 50 23 19 12 26 33 118 -8 9 2 5 6 39 19 10 58 16 4 46 50 - 4 0 0 7 37 52 19 12 19 34 118 -9 8 49 30 6 26 53 10 45 32 4 34 31 - 3 0 0 7 25 40 19 12 11 35 119 -10 8 37 12 6 14 45 10 33 6 4 22 30 - 2 0 0 7 13 45 19 12 3 36 119 -11 8 25 12 6 2 55 10 20 58 4 10 47 - 1 0 0 7 2 8 19 11 55 37 119 -12 8 13 31 5 51 23 10 9 9 3 59 22 0 0 0 6 50 49 19 11 47 38 120 -13 8 2 8 5 40 9 9 57 38 3 48 15 1 0 0 6 39 49 19 11 39 39 120 -14 7 51 3 5 29 13 9 46 26 3 37 26 2 0 0 6 29 8 19 11 30 40 121 -14 7 40 17 5 18 36 9 35 33 3 26 55 3 0 0 6 18 45 19 11 22 41 121 -15 7 29 50 5 8 17 9 24 58 3 16 43 4 0 0 6 8 40 19 11 13 42 121 -16 7 19 41 4 58 17 9 14 43 3 6 49 5 0 0 5 58 55 19 11 4 43 122 -17 7 9 52 4 48 35 9 4 46 2 57 14 6 0 0 5 49 29 19 10 55 44 122 -18 7 0 22 4 39 13 8 55 9 2 47 57 7 0 0 5 40 22 19 10 46 44 123 -19 6 51 10 4 30 9 8 45 52 2 39 0 8 0 0 5 31 33 19 10 37 45 123 -20 6 42 18 4 21 25 8 36 53 2 30 21 9 0 0 5 23 4 19 10 27 46 124 -21 6 33 46 4 12 59 8 28 15 2 22 1 10 0 0 5 14 55 19 10 18 47 124 -22 6 25 33 4 4 53 8 19 56 2 14 0 11 0 0 5 7 4 19 10 8 48 125 -23 6 17 39 3 57 6 8 11 56 2 6 18 12 0 0 4 59 34 19 9 58 49 125 -24 6 10 5 3 49 39 8 4 17 1 58 55 13 0 0 4 52 22 19 9 48 50 126 -25 6 2 50 3 42 30 7 56 57 1 51 52 14 0 0 4 45 31 19 9 38 50 127 -26 5 55 55 3 35 41 7 49 57 1 45 7 15 0 0 4 38 58 19 9 28 51 127 -26 5 49 20 3 29 12 7 43 17 1 38 42 16 0 0 4 32 46 19 9 18 52 128 -27 5 43 5 3 23 2 7 36 57 1 32 37 17 0 0 4 26 53 19 9 7 53 129 -28 5 37 10 3 17 12 7 30 57 1 26 50 18 0 0 4 21 20 19 8 57 54 130 -29 5 31 34 3 11 41 7 25 18 1 21 24 19 0 0 4 16 7 19 8 46 54 130 -30 5 26 19 3 6 31 7 19 58 1 16 16 20 0 0 4 11 13 19 8 35 55 131 -31 5 21 23 3 1 39 7 14 59 1 11 28 21 0 0 4 6 40 19 8 25 56 132 -32 5 16 47 2 57 8 7 10 20 1 7 0 22 0 0 4 2 26 19 8 14 57 133 -33 5 12 32 2 52 56 7 6 1 1 2 51 23 0 0 3 58 33 19 8 3 57 134 -33 5 8 36 2 49 4 7 2 2 0 59 2 24 0 0 3 54 59 19 7 52 58 135 -34 5 5 1 2 45 32 6 58 24 0 55 32 25 0 0 3 51 45 19 7 41 59 136 -35 5 1 45 2 42 20 6 55 6 0 52 22 26 0 0 3 48 51 19 7 30 60 138 -36 4 58 50 2 39 27 6 52 9 0 49 31 27 0 0 3 46 17 19 7 18 60 139 -37 4 56 15 2 36 54 6 49 31 0 47 0 28 0 0 3 44 3 19 7 7 61 140 -38 4 54 0 2 34 41 6 47 15 0 44 49 29 0 0 3 42 9 19 6 56 62 141 -38 4 52 5 2 32 48 6 45 18 0 42 58 30 0 0 3 40 36 19 6 44 62 143 -39 4 50 31 2 31 15 6 43 42 0 41 26 31 0 0 3 39 22 19 6 33 63 144 -40 4 49 16 2 30 2 6 42 27 0 40 13 32 0 0 3 38 28 19 6 21 63 146 -41 4 48 22 2 29 9 6 41 31 0 39 21 33 0 0 3 37 54 19 6 9 64 148 -42 4 47 47 2 28 35 6 40 57 0 38 48 34 0 0 3 37 40 19 5 58 64 149 -42 4 47 33 2 28 21 6 40 42 0 38 34 35 0 0 3 37 46 19 5 46 65 151 -43 4 47 39 2 28 28 6 40 48 0 38 41 36 0 0 3 38 12 19 5 34 65 153 -44 4 48 6 2 28 54 6 41 14 0 39 6 37 0 0 3 38 58 19 5 23 66 155 -45 4 48 52 2 29 39 6 42 1 0 39 52 38 0 0 3 40 4 19 5 11 66 157 -45 4 49 58 2 30 45 6 43 8 0 40 57 39 0 0 3 41 30 19 4 59 66 159 -46 4 51 25 2 32 10 6 44 35 0 42 21 40 0 0 3 43 16 19 4 47 67 161 -47 4 53 11 2 33 55 6 46 23 0 44 5 41 0 0 3 45 21 19 4 35 67 163 -48 4 55 17 2 36 0 6 48 30 0 46 9 42 0 0 3 47 47 19 4 23 67 166 -48 4 57 44 2 38 25 6 50 58 0 48 32 43 0 0 3 50 32 19 4 11 67 168 -49 5 0 30 2 41 9 6 53 47 0 51 15 44 0 0 3 53 37 19 3 59 67 170 -50 5 3 36 2 44 13 6 56 55 0 54 17 45 0 0 3 57 2 19 3 47 67 172 -50 5 7 3 2 47 36 7 0 23 0 57 38 46 0 0 4 0 46 19 3 35 68 175 -51 5 10 49 2 51 19 7 4 12 1 1 19 47 0 0 4 4 51 19 3 23 68 177 -52 5 14 54 2 55 22 7 8 21 1 5 19 48 0 0 4 9 14 19 3 11 67 180 -52 5 19 20 2 59 44 7 12 49 1 9 38 49 0 0 4 13 58 19 2 59 67 182 -53 5 24 5 3 4 25 7 17 37 1 14 16 50 0 0 4 19 0 19 2 47 67 184 -53 5 29 10 3 9 26 7 22 46 1 19 14 51 0 0 4 24 23 19 2 35 67 187 -54 5 34 34 3 14 46 7 28 14 1 24 31 52 0 0 4 30 4 19 2 24 67 189 -54 5 40 18 3 20 25 7 34 2 1 30 7 53 0 0 4 36 5 19 2 12 67 191 -55 5 46 22 3 26 24 7 40 9 1 36 2 54 0 0 4 42 25 19 2 0 66 193 -55 5 52 45 3 32 42 7 46 36 1 42 15 55 0 0 4 49 5 19 1 48 66 195 -56 5 59 27 3 39 18 7 53 23 1 48 48 56 0 0 4 56 3 19 1 36 66 197 -56 6 6 28 3 46 14 8 0 29 1 55 40 57 0 0 5 3 21 19 1 24 65 199 -57 6 13 49 3 53 29 8 7 55 2 2 50 58 0 0 5 10 57 19 1 12 65 201 -57 6 21 28 4 1 2 8 15 39 2 10 19 59 0 0 5 18 53 19 1 0 64 203 -58 6 29 27 4 8 55 8 23 43 2 18 6 60 0 0 5 27 7 19 0 49 64 205 -58 6 37 44 4 17 6 8 32 6 2 26 12 61 0 0 5 35 40 19 0 37 63 206 -58 6 46 21 4 25 35 8 40 48 2 34 37 62 0 0 5 44 31 19 0 25 63 208 -59 6 55 16 4 34 23 8 49 49 2 43 19 63 0 0 5 53 41 19 0 14 62 210 -59 7 4 29 4 43 30 8 59 9 2 52 20 64 0 0 6 3 10 19 0 2 61 211 -59 7 14 2 4 52 54 9 8 48 3 1 39 65 0 0 6 12 56 18 59 51 61 212 -59 7 23 52 5 2 37 9 18 45 3 11 17 66 0 0 6 23 1 18 59 39 60 214 -59 7 34 1 5 12 38 9 29 0 3 21 12 67 0 0 6 33 24 18 59 28 59 215 -60 7 44 28 5 22 57 9 39 34 3 31 24 68 0 0 6 44 5 18 59 17 59 216 -60 7 55 13 5 33 34 9 50 26 3 41 55 69 0 0 6 55 4 18 59 5 58 217 -60 8 6 16 5 44 29 10 1 36 3 52 43 70 0 0 7 6 20 18 58 54 57 219 -60 8 17 36 5 55 41 10 13 3 4 3 49 71 0 0 7 17 54 18 58 43 57 220 -60 8 29 15 6 7 10 10 24 49 4 15 12 72 0 0 7 29 45 18 58 32 56 221 -60 8 41 10 6 18 57 10 36 52 4 26 52 73 0 0 7 41 53 18 58 21 55 222 -60 8 53 23 6 31 1 10 49 13 4 38 49 74 0 0 7 54 18 18 58 11 54 223 -60 9 5 53 6 43 22 11 1 50 4 51 3 75 0 0 8 7 1 18 58 0 53 223 -59 9 18 40 6 55 59 11 14 45 5 3 33 76 0 0 8 20 0 18 57 49 53 224 -59 9 31 44 7 8 54 11 27 57 5 16 21 77 0 0 8 33 15 18 57 39 52 225 -59 9 45 4 7 22 5 11 41 26 5 29 24 78 0 0 8 46 47 18 57 29 51 226 -59 9 58 41 7 35 32 11 55 10 5 42 44 79 0 0 9 0 35 18 57 18 50 227 -58 10 12 34 7 49 15 12 9 12 5 56 20 80 0 0 9 14 39 18 57 8 49 227 -58 10 26 43 8 3 14 12 23 29 6 10 12 81 0 0 9 28 59 18 56 58 48 228 -58 10 41 8 8 17 29 12 38 2 6 24 19 82 0 0 9 43 34 18 56 48 48 229 -57 10 55 48 8 31 59 12 52 51 6 38 42 83 0 0 9 58 25 18 56 38 47 229 -57 11 10 44 8 46 45 13 7 55 6 53 20 84 0 0 10 13 31 18 56 29 46 230 -57 11 25 55 9 1 46 13 23 15 7 8 13 85 0 0 10 28 51 18 56 19 45 230 -56 11 41 20 9 17 2 13 38 49 7 23 21 86 0 0 10 44 26 18 56 10 44 231 -56 11 57 1 9 32 32 13 54 38 7 38 44 87 0 0 11 0 16 18 56 1 43 232 -55 12 12 56 9 48 16 14 10 41 7 54 20 88 0 0 11 16 20 18 55 52 42 232 -55 12 29 4 10 4 15 14 26 59 8 10 11 89 0 0 11 32 37 18 55 43 41 233 -54 12 45 27 10 20 28 14 43 30 8 26 16 90 0 0 11 49 8 18 55 34 40 233 -54 13 2 3 10 36 54 15 0 15 8 42 35 91 0 0 12 5 53 18 55 25 39 234 -53 13 18 53 10 53 33 15 17 13 8 59 6 92 0 0 12 22 50 18 55 17 39 234 -52 13 35 55 11 10 26 15 34 24 9 15 51 93 0 0 12 40 0 18 55 9 38 235 -52 13 53 11 11 27 31 15 51 48 9 32 49 94 0 0 12 57 23 18 55 0 37 235 -51 14 10 38 11 44 48 16 9 24 9 49 59 95 0 0 13 14 58 18 54 52 36 235 -50 14 28 18 12 2 18 16 27 12 10 7 21 96 0 0 13 32 44 18 54 45 35 236 -50 14 46 9 12 20 0 16 45 12 10 24 55 97 0 0 13 50 42 18 54 37 34 236 -49 15 4 12 12 37 53 17 3 23 10 42 41 98 0 0 14 8 51 18 54 30 33 237 -48 15 22 26 12 55 57 17 21 45 11 0 38 99 0 0 14 27 10 18 54 22 32 237 -48 15 40 51 13 14 12 17 40 18 11 18 46 100 0 0 14 45 41 18 54 15 31 237 -47 15 59 25 13 32 37 17 59 0 11 37 4 101 0 0 15 4 21 18 54 9 30 238 -46 16 18 10 13 51 13 18 17 53 11 55 33 102 0 0 15 23 11 18 54 2 29 238 -45 16 37 5 14 9 58 18 36 55 12 14 11 103 0 0 15 42 10 18 53 55 28 239 -45 16 56 8 14 28 53 18 56 6 12 32 59 104 0 0 16 1 18 18 53 49 27 239 -44 17 15 21 14 47 57 19 15 26 12 51 56 105 0 0 16 20 34 18 53 43 26 239 -43 17 34 42 15 7 9 19 34 54 13 11 2 106 0 0 16 39 59 18 53 37 25 240 -42 17 54 11 15 26 30 19 54 30 13 30 17 107 0 0 16 59 32 18 53 32 24 240 -41 18 13 47 15 45 59 20 14 13 13 49 39 108 0 0 17 19 11 18 53 26 23 240 -41 18 33 31 16 5 35 20 34 4 14 9 9 109 0 0 17 38 58 18 53 21 22 241 -40 18 53 21 16 25 18 20 54 1 14 28 46 110 0 0 17 58 51 18 53 16 21 241 -39 19 13 18 16 45 7 21 14 4 14 48 31 111 0 0 18 18 50 18 53 11 20 242 -38 19 33 21 17 5 3 21 34 12 15 8 21 112 0 0 18 38 55 18 53 7 19 242 -37 19 53 29 17 25 4 21 54 26 15 28 17 113 0 0 18 59 5 18 53 2 18 242 -36 20 13 42 17 45 11 22 14 45 15 48 19 114 0 0 19 19 20 18 52 58 17 243 -35 20 34 0 18 5 23 22 35 8 16 8 26 115 0 0 19 39 39 18 52 54 16 243 -35 20 54 22 18 25 39 22 55 34 16 28 38 116 0 0 20 0 2 18 52 50 15 243 -34 21 14 48 18 45 59 23 16 4 16 48 54 117 0 0 20 20 28 18 52 47 14 244 -33 21 35 16 19 6 23 23 36 37 17 9 14 118 0 0 20 40 57 18 52 44 14 244 -32 21 55 48 19 26 49 23 57 13 17 29 37 119 0 0 21 1 28 18 52 41 13 244 -31 22 16 21 19 47 19 24 17 50 17 50 3 120 0 0 21 22 2 18 52 38 12 245 -30 22 36 57 20 7 50 24 38 29 18 10 31 121 0 0 21 42 36 18 52 35 11 245 -29 22 57 34 20 28 23 24 59 9 18 31 1 122 0 0 22 3 12 18 52 33 10 246 -28 23 18 11 20 48 57 25 19 49 18 51 33 123 0 0 22 23 49 18 52 31 9 246 -27 23 38 49 21 9 33 25 40 29 19 12 6 124 0 0 22 44 25 18 52 29 8 246 -27 23 59 27 21 30 8 26 1 9 19 32 39 125 0 0 23 5 1 18 52 27 7 247 -26 24 20 4 21 50 43 26 21 48 19 53 13 126 0 0 23 25 37 18 52 26 6 247 -25 24 40 40 22 11 17 26 42 25 20 13 46 127 0 0 23 46 11 18 52 25 5 248 -24 25 1 14 22 31 51 27 3 1 20 34 18 128 0 0 24 6 43 18 52 24 4 248 -23 25 21 47 22 52 22 27 23 34 20 54 49 129 0 0 24 27 12 18 52 23 3 248 -22 25 42 17 23 12 52 27 44 4 21 15 18 130 0 0 24 47 39 18 52 23 2 249 -21 26 2 44 23 33 19 28 4 31 21 35 45 131 0 0 25 8 3 18 52 22 1 249 -20 26 23 7 23 53 43 .. .. .. 21 56 9 Uncertainty in time = +/- 22 secs [Prediction of 2008 Jul 2.0] Data for the target star ------------------------ * name: UCAC2 24879439 * constellation : Ophiuchus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 19 50.7555 DE: -18 22 47.155 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .122, .122 ) * V mag [mag]: 11.5 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (65) Cybele approx. diameter [km]: 237 approx. diameter ["]: .154 distance from Earth [AU]: 2.12800 * orbital information: orbit source: Preston date of fit: 2008 Jul 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1463 number of rejected observations: 128 time covered by the observations: 1903 Dec 14 - 2008 Jun 30 1 sigma uncertainty ellipse (major, minor, PA): 0.015, 0.009, 95° remarks: * orbital elements for (65) Cybele : Mean anomaly = 5.87132137 deg Arg. of pericenter = 105.53052070 deg Long. of node = 155.75353115 deg Inclination = 3.54845417 deg Eccentricity = 0.10645505 Semimajor axis = 3.43859001 AU Perihelion dist = 3.07253475 AU Mag: H = 6.71, G = 0.01 Epoch of elements : MJD 54654.79400000 TDT (2008 Jul 07.794) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jul 7 65 Cybele 19h 3.5m UT 11.5 17 19 50.755-18 22 47.16UCAC2 24879439 0.0 11.4 237 26.9 2.128 -1.441 -1.53 47.9705 -18.379 -104.61 22.48 19.0583 -0.02863 0.38104 -4.96642 -0.37033 0.00241 -0.00059 2000 5.1302982008 7 3.00000105.530521155.753531 3.5484540.10645505 3.4385900 3.0725347 6.6 5.00.01 RATE 1.5457300 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.123 0.122 90 1.80 0.122 0 54649.5020080707_879439 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jul 02, 19:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org