IOTA/IOTA-ES occultation update for (1196) Sheba / TYC 6226-01526-1 event on 2009 Aug 07, 15:18 UT Visible from Summary ------- On 2009 Aug 07 UT, the 29 km diameter asteroid (1196) Sheba will occult a 11.0 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.7 mag to 14.7 mag (the magnitude of the asteroid) for at most 4.3 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: 36 * date and approx. time of event: 2009 Aug 07, 15:04 - 2009 Aug 07, 15:28 UT * magnitude of target star: 11.0 * magnitude drop [mag]: 3.7 * estimated maximum duration [s]: 4.3 * Moon: 98 % sunlit, 78° distance * Sun: 119° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 38 * 1 sigma uncertainty interval [path widths]: +/- 1.85 * 1 sigma uncertainty interval [seconds]: +/- 6.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .040 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .040", .031", 107° ) * approx speed of asteroid's shadow [km/s]: 6.7929 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6226-01526-1 by 1196 Sheba on 2009 Aug 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 ' " Longitude Longitude Longitude Longitude 131 41 47 52 0 0 15 4 19 1 236 -22 131 13 44 132 10 17 ... .. .. ... .. .. 129 33 11 51 0 0 15 4 20 3 234 -23 129 7 37 129 59 6 ... .. .. 131 38 24 127 39 38 50 0 0 15 4 22 4 232 -24 127 16 0 128 3 33 125 50 52 129 34 41 125 58 7 49 0 0 15 4 25 6 231 -24 125 36 3 126 20 25 124 16 15 127 45 6 124 26 30 48 0 0 15 4 28 7 230 -25 124 5 43 124 47 28 122 50 23 126 6 53 123 3 12 47 0 0 15 4 32 9 229 -26 122 43 30 123 23 4 121 31 59 124 38 4 121 47 2 46 0 0 15 4 37 10 228 -27 121 28 16 122 5 56 120 20 1 123 17 12 120 37 3 45 0 0 15 4 41 11 227 -27 120 19 6 120 55 8 119 13 43 122 3 9 119 32 30 44 0 0 15 4 47 12 227 -28 119 15 16 119 49 51 118 12 24 120 55 3 118 32 46 43 0 0 15 4 53 14 226 -29 118 16 10 118 49 28 117 15 33 119 52 10 117 37 20 42 0 0 15 4 59 15 226 -30 117 21 18 117 53 28 116 22 42 118 53 57 116 45 46 41 0 0 15 5 6 16 225 -30 116 30 15 117 1 23 115 33 27 117 59 53 115 57 43 40 0 0 15 5 12 17 225 -31 115 42 39 116 12 52 114 47 30 117 9 35 115 12 52 39 0 0 15 5 20 18 224 -32 114 58 12 115 27 35 114 4 34 116 22 41 114 30 56 38 0 0 15 5 27 19 224 -33 114 16 39 114 45 16 113 24 23 115 38 53 113 51 41 37 0 0 15 5 35 20 224 -33 113 37 45 114 5 40 112 46 44 114 57 57 113 14 55 36 0 0 15 5 44 21 224 -34 113 1 19 113 28 35 112 11 26 114 19 37 112 40 28 35 0 0 15 5 52 22 223 -35 112 27 9 112 53 49 111 38 20 113 43 44 112 8 8 34 0 0 15 6 1 23 223 -35 111 55 6 112 21 14 111 7 16 113 10 6 111 37 49 33 0 0 15 6 11 24 223 -36 111 25 2 111 50 39 110 38 7 112 38 33 111 9 22 32 0 0 15 6 20 25 223 -37 110 56 49 111 21 58 110 10 44 112 8 59 110 42 41 31 0 0 15 6 30 26 223 -37 110 30 21 110 55 4 109 45 3 111 41 15 110 17 39 30 0 0 15 6 40 27 223 -38 110 5 31 110 29 50 109 20 56 111 15 15 109 54 11 29 0 0 15 6 50 28 223 -39 109 42 14 110 6 10 108 58 20 110 50 53 109 32 12 28 0 0 15 7 1 29 223 -40 109 20 25 109 44 1 108 37 9 110 28 4 109 11 37 27 0 0 15 7 12 30 223 -40 109 0 0 109 23 16 108 17 19 110 6 42 108 52 23 26 0 0 15 7 23 31 224 -41 108 40 55 109 3 53 107 58 46 109 46 45 108 34 26 25 0 0 15 7 34 32 224 -42 108 23 6 108 45 47 107 41 27 109 28 7 108 17 42 24 0 0 15 7 46 33 224 -42 108 6 30 108 28 56 107 25 19 109 10 46 108 2 8 23 0 0 15 7 58 33 224 -43 107 51 4 108 13 15 107 10 19 108 54 38 107 47 43 22 0 0 15 8 10 34 225 -44 107 36 45 107 58 43 106 56 25 108 39 41 107 34 23 21 0 0 15 8 22 35 225 -44 107 23 31 107 45 17 106 43 34 108 25 51 107 22 6 20 0 0 15 8 34 36 225 -45 107 11 20 107 32 54 106 31 43 108 13 7 107 10 50 19 0 0 15 8 47 37 226 -46 107 0 9 107 21 33 106 20 52 108 1 26 107 0 34 18 0 0 15 9 0 37 226 -47 106 49 58 107 11 12 106 10 58 107 50 47 106 51 16 17 0 0 15 9 13 38 227 -47 106 40 44 107 1 49 106 2 1 107 41 7 106 42 54 16 0 0 15 9 26 39 227 -48 106 32 26 106 53 23 105 53 58 107 32 26 106 35 28 15 0 0 15 9 40 40 228 -49 106 25 4 106 45 53 105 46 48 107 24 42 106 28 55 14 0 0 15 9 54 40 228 -49 106 18 34 106 39 17 105 40 31 107 17 54 106 23 16 13 0 0 15 10 8 41 229 -50 106 12 58 106 33 35 105 35 6 107 12 0 106 18 29 12 0 0 15 10 22 42 230 -51 106 8 14 106 28 46 105 30 31 107 7 1 106 14 34 11 0 0 15 10 36 42 230 -51 106 4 21 106 24 48 105 26 46 107 2 55 106 11 30 10 0 0 15 10 50 43 231 -52 106 1 19 106 21 43 105 23 51 106 59 42 106 9 17 9 0 0 15 11 5 44 232 -53 105 59 8 106 19 28 105 21 45 106 57 22 106 7 54 8 0 0 15 11 20 44 233 -54 105 57 46 106 18 4 105 20 29 106 55 53 106 7 22 7 0 0 15 11 35 45 233 -54 105 57 15 106 17 31 105 20 1 106 55 16 106 7 40 6 0 0 15 11 50 45 234 -55 105 57 33 106 17 48 105 20 22 106 55 31 106 8 48 5 0 0 15 12 5 46 235 -56 105 58 42 106 18 56 105 21 31 106 56 38 106 10 47 4 0 0 15 12 20 46 236 -56 106 0 40 106 20 54 105 23 30 106 58 37 106 13 36 3 0 0 15 12 36 47 237 -57 106 3 29 106 23 44 105 26 18 107 1 28 106 17 17 2 0 0 15 12 52 47 238 -58 106 7 9 106 27 25 105 29 56 107 5 11 106 21 49 1 0 0 15 13 8 48 239 -58 106 11 41 106 31 59 105 34 23 107 9 48 106 27 13 0 0 0 15 13 24 48 240 -59 106 17 4 106 37 25 105 39 42 107 15 19 106 33 31 - 1 0 0 15 13 40 48 241 -60 106 23 20 106 43 44 105 45 52 107 21 45 106 40 43 - 2 0 0 15 13 56 49 242 -60 106 30 30 106 50 57 105 52 55 107 29 6 106 48 49 - 3 0 0 15 14 12 49 243 -61 106 38 34 106 59 7 106 0 50 107 37 24 106 57 52 - 4 0 0 15 14 29 49 244 -62 106 47 34 107 8 12 106 9 41 107 46 40 107 7 53 - 5 0 0 15 14 45 49 245 -62 106 57 31 107 18 16 106 19 27 107 56 55 107 18 52 - 6 0 0 15 15 2 49 247 -63 107 8 27 107 29 18 106 30 10 108 8 11 107 30 52 - 7 0 0 15 15 19 50 248 -64 107 20 23 107 41 22 106 41 52 108 20 30 107 43 54 - 8 0 0 15 15 36 50 249 -64 107 33 21 107 54 29 106 54 35 108 33 53 107 58 1 - 9 0 0 15 15 53 50 250 -65 107 47 24 108 8 41 107 8 20 108 48 23 108 13 15 -10 0 0 15 16 10 50 251 -66 108 2 32 108 24 0 107 23 10 109 4 2 108 29 38 -11 0 0 15 16 27 50 252 -66 108 18 49 108 40 28 107 39 6 109 20 52 108 47 12 -12 0 0 15 16 44 50 254 -67 108 36 17 108 58 9 107 56 12 109 38 57 109 6 2 -13 0 0 15 17 2 50 255 -67 108 55 0 109 17 5 108 14 30 109 58 19 109 26 9 -14 0 0 15 17 19 49 256 -68 109 15 0 109 37 20 108 34 3 110 19 2 109 47 38 -15 0 0 15 17 37 49 257 -69 109 36 21 109 58 57 108 54 56 110 41 11 110 10 33 -16 0 0 15 17 54 49 258 -69 109 59 7 110 22 1 109 17 10 111 4 48 110 34 58 -17 0 0 15 18 12 49 259 -70 110 23 23 110 46 36 109 40 52 111 29 58 111 0 58 -18 0 0 15 18 30 48 260 -70 110 49 12 111 12 46 110 6 4 111 56 48 111 28 38 -19 0 0 15 18 48 48 261 -70 111 16 41 111 40 37 110 32 53 112 25 22 111 58 4 -20 0 0 15 19 6 48 262 -71 111 45 55 112 10 15 111 1 23 112 55 47 112 29 23 -21 0 0 15 19 24 47 263 -71 112 17 1 112 41 48 111 31 42 113 28 11 Latitude Latitude Latitude Latitude 113 0 0 -21 55 17 15 19 41 47 264 -72 -22 17 16 -21 33 1 -23 36 22 -20 8 1 114 0 0 -23 35 9 15 20 11 46 266 -72 -23 55 41 -23 14 24 -25 9 48 -21 55 29 115 0 0 -25 5 31 15 20 39 45 267 -72 -25 24 51 -24 46 0 -26 34 50 -23 32 1 116 0 0 -26 27 52 15 21 4 44 268 -73 -26 46 11 -26 9 22 -27 52 40 -24 59 29 117 0 0 -27 43 20 15 21 28 43 268 -73 -28 0 48 -27 25 43 -29 4 17 -26 19 17 118 0 0 -28 52 50 15 21 50 42 269 -73 -29 9 34 -28 35 59 -30 10 26 -27 32 30 119 0 0 -29 57 4 15 22 10 41 269 -72 -30 13 9 -29 40 52 -31 11 44 -28 39 58 120 0 0 -30 56 36 15 22 29 40 270 -72 -31 12 7 -30 41 0 -32 8 42 -29 42 21 121 0 0 -31 51 56 15 22 47 39 270 -72 -32 6 57 -31 36 51 -33 1 44 -30 40 12 122 0 0 -32 43 28 15 23 4 39 270 -72 -32 58 2 -32 28 50 -33 51 12 -31 33 58 123 0 0 -33 31 33 15 23 20 38 270 -71 -33 45 41 -33 17 20 -34 37 24 -32 24 3 124 0 0 -34 16 27 15 23 35 37 270 -71 -34 30 13 -34 2 36 -35 20 37 -33 10 46 125 0 0 -34 58 25 15 23 49 36 270 -71 -35 11 52 -34 44 55 -36 1 4 -33 54 23 126 0 0 -35 37 42 15 24 3 35 270 -70 -35 50 51 -35 24 30 -36 38 58 -34 35 8 127 0 0 -36 14 28 15 24 15 34 270 -70 -36 27 20 -36 1 33 -37 14 27 -35 13 16 128 0 0 -36 48 54 15 24 28 33 269 -69 -37 1 30 -36 36 14 -37 47 43 -35 48 56 129 0 0 -37 21 8 15 24 39 33 269 -69 -37 33 30 -37 8 42 -38 18 53 -36 22 17 130 0 0 -37 51 18 15 24 50 32 269 -68 -38 3 28 -37 39 5 -38 48 4 -36 53 30 131 0 0 -38 19 31 15 25 1 31 268 -68 -38 31 29 -38 7 31 -39 15 24 -37 22 41 132 0 0 -38 45 55 15 25 11 30 268 -67 -38 57 42 -38 34 5 -39 40 57 -37 49 56 133 0 0 -39 10 33 15 25 21 29 268 -67 -39 22 10 -38 58 53 -40 4 50 -38 15 23 134 0 0 -39 33 32 15 25 30 29 267 -66 -39 45 0 -39 22 1 -40 27 6 -38 39 7 135 0 0 -39 54 55 15 25 39 28 267 -66 -40 6 15 -39 43 34 -40 47 51 -39 1 11 136 0 0 -40 14 48 15 25 47 27 266 -65 -40 26 0 -40 3 34 -41 7 7 -39 21 41 137 0 0 -40 33 13 15 25 55 26 266 -65 -40 44 18 -40 22 6 -41 24 59 -39 40 41 138 0 0 -40 50 14 15 26 3 25 265 -64 -41 1 12 -40 39 14 -41 41 30 -39 58 14 139 0 0 -41 5 54 15 26 11 25 265 -64 -41 16 47 -40 55 0 -41 56 43 -40 14 23 140 0 0 -41 20 16 15 26 18 24 264 -63 -41 31 3 -41 9 28 -42 10 39 -40 29 12 141 0 0 -41 33 22 15 26 25 23 264 -63 -41 44 4 -41 22 39 -42 23 22 -40 42 42 142 0 0 -41 45 14 15 26 31 22 263 -62 -41 55 51 -41 34 35 -42 34 53 -40 54 56 143 0 0 -41 55 55 15 26 38 22 263 -62 -42 6 28 -41 45 20 -42 45 15 -41 5 56 144 0 0 -42 5 25 15 26 44 21 262 -61 -42 15 54 -41 54 54 -42 54 28 -41 15 44 145 0 0 -42 13 47 15 26 49 20 261 -61 -42 24 13 -42 3 19 -43 2 35 -41 24 21 146 0 0 -42 21 1 15 26 55 20 261 -60 -42 31 24 -42 10 36 -43 9 36 -41 31 49 147 0 0 -42 27 10 15 27 0 19 260 -60 -42 37 31 -42 16 47 -43 15 33 -41 38 10 148 0 0 -42 32 13 15 27 6 18 260 -59 -42 42 32 -42 21 53 -43 20 27 -41 43 24 149 0 0 -42 36 13 15 27 11 17 259 -59 -42 46 29 -42 25 54 -43 24 18 -41 47 31 150 0 0 -42 39 8 15 27 15 17 258 -58 -42 49 24 -42 28 51 -43 27 8 -41 50 34 151 0 0 -42 41 1 15 27 20 16 258 -58 -42 51 16 -42 30 45 -43 28 56 -41 52 32 152 0 0 -42 41 51 15 27 24 15 257 -57 -42 52 5 -42 31 36 -43 29 43 -41 53 25 153 0 0 -42 41 39 15 27 28 14 256 -57 -42 51 53 -42 31 24 -43 29 29 -41 53 15 154 0 0 -42 40 25 15 27 32 14 256 -56 -42 50 39 -42 30 10 -43 28 15 -41 52 1 155 0 0 -42 38 9 15 27 36 13 255 -56 -42 48 23 -42 27 54 -43 26 0 -41 49 44 156 0 0 -42 34 50 15 27 39 12 255 -55 -42 45 5 -42 24 34 -43 22 44 -41 46 22 157 0 0 -42 30 29 15 27 43 11 254 -55 -42 40 44 -42 20 12 -43 18 27 -41 41 56 158 0 0 -42 25 5 15 27 46 11 253 -54 -42 35 21 -42 14 47 -43 13 9 -41 36 26 159 0 0 -42 18 37 15 27 49 10 253 -54 -42 28 55 -42 8 17 -43 6 49 -41 29 51 160 0 0 -42 11 5 15 27 52 9 252 -53 -42 21 25 -42 0 44 -42 59 26 -41 22 9 161 0 0 -42 2 28 15 27 54 8 251 -53 -42 12 51 -41 52 4 -42 51 0 -41 13 21 162 0 0 -41 52 45 15 27 56 8 251 -52 -42 3 10 -41 42 19 -42 41 29 -41 3 26 163 0 0 -41 41 55 15 27 59 7 250 -52 -41 52 23 -41 31 26 -42 30 54 -40 52 21 164 0 0 -41 29 57 15 28 1 6 249 -51 -41 40 28 -41 19 24 -42 19 11 -40 40 6 165 0 0 -41 16 49 15 28 2 5 249 -50 -41 27 24 -41 6 12 -42 6 20 -40 26 40 166 0 0 -41 2 29 15 28 4 5 248 -50 -41 13 9 -40 51 48 -41 52 20 -40 12 0 167 0 0 -40 46 56 15 28 5 4 247 -49 -40 57 40 -40 36 10 .. .. .. -39 56 5 168 0 0 -40 30 8 15 28 6 3 247 -49 -40 40 57 -40 19 17 .. .. .. -39 38 53 169 0 0 -40 12 3 15 28 7 2 246 -48 -40 22 57 -40 1 7 .. .. .. -39 20 22 170 0 0 -39 52 38 15 28 7 1 245 -48 -40 3 38 -39 41 35 .. .. .. -39 0 28 171 0 0 -39 31 50 15 28 8 0 245 -47 -39 42 57 -39 20 41 .. .. .. -38 39 10 Uncertainty in time = +/- 8 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 6226-01526-1 * constellation : Ophiuchus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 51 30.9103 DE: -19 36 04.210 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .025 ) * V mag [mag]: 11.0 * B mag [mag]: 11.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1196) Sheba approx. diameter [km]: 29 approx. diameter ["]: .021 distance from Earth [AU]: 1.90900 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 681 number of rejected observations: 41 time covered by the observations: 1912 Jan 19 - 2008 Feb 10 1 sigma uncertainty ellipse (major, minor, PA): 0.033, 0.019, 116° remarks: * orbital elements for (1196) Sheba : Mean anomaly = 291.62357348 deg Arg. of pericenter = 261.85337458 deg Long. of node = 101.02142440 deg Inclination = 17.67687259 deg Eccentricity = 0.18112445 Semimajor axis = 2.65186525 AU Perihelion dist = 2.17154760 AU Mag: H = 10.12, G = 0.15 Epoch of elements : MJD 55050.63800000 TDT (2009 Aug 07.638) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Aug 7 1196 Sheba 15h 16.2m UT 11.0 16 51 30.910-19 36 4.21TYC 6226-01526-1 11.4 14.7 29 4.3 1.909 0.167 -17.50 67.5492 -19.596 -47.61 16.26 15.2701 0.64017 0.08619 0.50804 -3.80028 0.00474 -0.00069 2000 291.4779612009 8 7.00000261.853375101.021424 17.6768730.18112445 2.6518653 2.171547610.3 5.00.15 RATE 2.2823220 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.040 0.031 107 2.85 0.039 0 54545.5020090807_1526-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 11:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org