IOTA/IOTA-ES occultation update for (219) Thusnelda / TYC 0174-01664-1 event on 2008 Feb 03, 15:57 UT Visible from Japan, E Russia Summary ------- On 2008 Feb 03 UT, the 40 km diameter asteroid (219) Thusnelda will occult a 11.2 mag star in the constellation Monoceros for observers along a path across Japan, E Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.3 mag to 13.3 mag (the magnitude of the asteroid) for at most 3.8 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: 53 * date and approx. time of event: 2008 Feb 03, 15:51 - 2008 Feb 03, 16:03 UT * midpoint of event [JD]: 2454500.16492917 * magnitude of target star: 11.2 * magnitude drop [mag]: 2.3 * estimated maximum duration [s]: 3.8 * Moon: 12 % sunlit, 155° distance * Sun: 148° distance * rough path description: Japan, E Russia The occultation path -------------------- * approximate projected width [km]: 69 * 1 sigma uncertainty interval [path widths]: +/- 1.20 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .039) * 1 sigma uncertainty ellipse (major, minor, PA): ( .039", .030", 1° ) * approx speed of asteroid's shadow [km/s]: 10.4526 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0174-01664-1 by 219 Thusnelda on 2008 Feb 03 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. -178 11 47 27 24 22 ... .. .. .. .. .. -178 1 26 28 26 20 15 51 41 6 274 -37 -179 33 25 28 25 10 -175 58 58 28 24 12 177 37 22 28 16 51 ... .. .. .. .. .. 177 47 31 29 19 5 15 51 50 9 272 -41 176 46 54 29 14 27 178 54 37 29 23 1 174 39 40 29 1 25 -177 36 56 29 27 23 174 50 6 30 3 53 15 51 59 12 270 -43 174 0 58 29 57 57 175 42 29 30 9 29 172 13 30 29 42 36 178 6 18 30 21 2 172 24 15 30 45 19 15 52 8 14 269 -45 171 41 29 30 38 36 173 9 6 30 51 48 170 6 2 30 21 48 175 7 24 31 6 17 170 17 6 31 24 45 15 52 17 16 268 -47 169 38 29 31 17 31 170 57 14 31 31 49 168 11 16 30 59 40 172 40 57 31 48 4 168 22 38 32 2 52 15 52 26 17 266 -48 167 46 59 31 55 15 168 59 29 32 10 22 166 25 49 31 36 33 170 33 33 32 27 50 166 37 29 32 40 1 15 52 35 19 265 -49 166 4 5 32 32 5 167 11 53 32 47 52 164 47 35 32 12 44 168 38 59 33 6 16 164 59 31 33 16 28 15 52 44 20 264 -51 164 27 52 33 8 16 165 32 1 33 24 35 163 15 6 32 48 20 166 53 50 33 43 44 163 27 18 33 52 21 15 52 53 21 263 -52 162 57 5 33 43 55 163 58 16 34 0 42 161 47 20 33 23 29 165 15 56 34 20 30 161 59 48 34 27 48 15 53 2 22 262 -53 161 30 45 34 19 10 162 29 31 34 36 22 160 23 33 33 58 17 163 43 48 34 56 42 160 36 15 35 2 53 15 53 11 23 261 -53 160 8 11 34 54 5 161 4 55 35 11 39 159 3 7 34 32 47 162 16 24 35 32 29 159 16 3 35 37 42 15 53 20 24 260 -54 158 48 49 35 28 44 159 43 50 35 46 39 157 45 36 35 7 3 160 52 59 36 7 55 157 58 44 36 12 18 15 53 28 25 259 -55 157 32 13 36 3 10 158 25 46 36 21 24 156 30 35 35 41 7 159 32 55 36 43 5 156 43 56 36 46 42 15 53 37 26 258 -55 156 18 3 36 37 25 157 10 19 36 55 57 155 17 47 36 15 3 158 15 45 37 18 2 155 31 20 37 20 58 15 53 46 27 257 -56 155 5 59 37 11 33 155 57 9 37 30 22 154 6 56 36 48 50 157 1 6 37 52 49 154 20 41 37 55 7 15 53 55 27 256 -57 153 55 49 37 45 34 154 46 0 38 4 40 152 57 49 37 22 33 155 48 39 38 27 27 153 11 45 38 29 12 15 54 4 28 254 -57 152 47 17 38 19 30 153 36 37 38 38 52 151 50 15 37 56 11 154 38 9 39 2 0 152 4 20 39 3 12 15 54 13 29 253 -57 151 40 15 38 53 23 152 28 50 39 13 1 150 44 3 38 29 46 153 29 21 39 36 28 150 58 18 39 37 11 15 54 22 29 252 -58 150 34 33 39 27 14 151 22 27 39 47 7 149 39 4 39 3 20 152 22 6 40 10 54 149 53 29 40 11 9 15 54 31 30 251 -58 149 30 1 40 1 5 150 17 20 40 21 13 148 35 12 39 36 53 151 16 12 40 45 18 148 49 46 40 45 7 15 54 40 30 250 -58 148 26 33 40 34 55 149 13 20 40 55 18 147 32 20 40 10 26 150 11 32 41 19 43 147 47 1 41 19 6 15 54 49 31 249 -58 147 24 3 41 8 47 148 10 22 41 29 25 146 30 20 40 44 1 149 7 57 41 54 8 146 45 10 41 53 8 15 54 58 31 248 -58 146 22 23 41 42 41 147 8 18 42 3 34 145 29 9 41 17 38 148 5 21 42 28 35 145 44 5 42 27 12 15 55 7 32 247 -58 145 21 29 42 16 39 146 7 2 42 37 46 144 28 39 41 51 17 147 3 38 43 3 6 144 43 42 43 1 21 15 55 16 32 245 -59 144 21 16 42 50 40 145 6 29 43 12 2 143 28 48 42 25 1 146 2 41 43 37 40 143 43 56 43 35 34 15 55 25 33 244 -58 143 21 39 43 24 45 144 6 35 43 46 23 142 29 30 42 58 50 145 2 25 44 12 20 142 44 43 44 9 53 15 55 34 33 243 -58 142 22 33 43 58 57 143 7 15 44 20 49 141 30 41 43 32 43 144 2 47 44 47 5 141 45 59 44 44 18 15 55 43 33 242 -58 141 23 55 44 33 14 142 8 24 44 55 22 140 32 17 44 6 43 143 3 40 45 21 57 140 47 39 45 18 50 15 55 52 34 241 -58 140 25 40 45 7 39 141 9 59 45 30 2 139 34 15 44 40 49 142 5 2 45 56 56 139 49 40 45 53 30 15 56 0 34 239 -58 139 27 45 45 42 11 140 11 55 46 4 50 138 36 31 45 15 3 141 6 48 46 32 4 138 51 58 46 28 19 15 56 9 34 238 -58 138 30 7 46 16 51 139 14 10 46 39 47 137 39 2 45 49 25 140 8 54 47 7 20 137 54 30 47 3 17 15 56 18 34 237 -58 137 32 42 46 51 41 138 16 39 47 14 53 136 41 43 46 23 55 139 11 17 47 42 47 136 57 12 47 38 25 15 56 27 35 236 -57 136 35 26 47 26 41 137 19 19 47 50 9 135 44 33 46 58 35 138 13 52 48 18 24 136 0 1 48 13 43 15 56 36 35 235 -57 135 38 17 48 1 51 136 22 6 48 25 37 134 47 28 47 33 26 137 16 37 48 54 13 135 2 54 48 49 14 15 56 45 35 233 -57 134 41 10 48 37 13 135 24 58 49 1 16 133 50 24 48 8 27 136 19 28 49 30 14 134 5 47 49 24 57 15 56 54 35 232 -56 133 44 3 49 12 47 134 27 51 49 37 8 132 53 19 48 43 40 135 22 22 50 6 28 133 8 37 50 0 53 15 57 3 35 231 -56 132 46 53 49 48 33 133 30 42 50 13 14 131 56 9 49 19 5 134 25 15 50 42 57 132 11 20 50 37 3 15 57 12 35 229 -55 131 49 36 50 24 34 132 33 27 50 49 33 130 58 51 49 54 43 133 28 4 51 19 40 131 13 54 51 13 28 15 57 21 35 228 -55 130 52 8 51 0 49 131 36 2 51 26 8 130 1 21 50 30 35 132 30 45 51 56 40 130 16 14 51 50 8 15 57 30 35 227 -54 129 54 27 51 37 20 130 38 25 52 2 59 129 3 37 51 6 42 131 33 14 52 33 56 129 18 18 52 27 6 15 57 39 35 225 -54 128 56 28 52 14 6 129 40 31 52 40 7 128 5 34 51 43 4 130 35 29 53 11 30 128 20 0 53 4 21 15 57 48 35 224 -53 127 58 8 52 51 11 128 42 17 53 17 33 127 7 9 52 19 43 129 37 24 53 49 23 127 21 18 53 41 54 15 57 57 35 223 -53 126 59 22 53 28 33 127 43 38 53 55 18 126 8 17 52 56 39 128 38 57 54 27 36 126 22 7 54 19 47 15 58 6 35 221 -52 126 0 8 54 6 14 126 44 31 54 33 23 125 8 56 53 33 53 127 40 2 55 6 11 125 22 22 54 58 1 15 58 15 35 220 -52 125 0 19 54 44 16 125 44 51 55 11 49 124 9 0 54 11 26 126 40 35 55 45 7 124 21 59 55 36 37 15 58 24 35 219 -51 123 59 52 55 22 39 124 44 33 55 50 38 123 8 25 54 49 20 125 40 32 56 24 28 123 20 53 56 15 36 15 58 32 35 217 -50 122 58 41 56 1 25 123 43 32 56 29 50 122 7 6 55 27 35 124 39 46 57 4 14 122 18 58 56 55 0 15 58 41 34 216 -50 121 56 41 56 40 35 122 41 42 57 9 28 121 4 58 56 6 13 123 38 13 57 44 26 121 16 7 57 34 49 15 58 50 34 214 -49 120 53 45 57 20 9 121 38 57 57 49 32 120 1 54 56 45 14 122 35 45 58 25 6 120 12 15 58 15 5 15 58 59 34 213 -48 119 49 48 58 0 11 120 35 10 58 30 4 118 57 48 57 24 40 121 32 17 59 6 16 119 7 13 58 55 51 15 59 8 34 212 -48 118 44 42 58 40 40 119 30 15 59 11 5 117 52 33 58 4 33 120 27 40 59 47 58 118 0 55 59 37 6 15 59 17 33 210 -47 117 38 18 59 21 40 118 24 2 59 52 38 116 46 1 58 44 53 119 21 46 60 30 13 116 53 10 60 18 55 15 59 26 33 209 -46 116 30 28 60 3 10 117 16 23 60 34 44 115 38 4 59 25 43 118 14 26 61 13 4 115 43 48 61 1 17 15 59 35 33 207 -45 115 21 2 60 45 14 116 7 7 61 17 26 114 28 32 60 7 4 117 5 28 61 56 32 114 32 38 61 44 16 15 59 44 32 206 -44 114 9 49 61 27 54 114 56 2 62 0 45 113 17 14 60 48 59 115 54 41 62 40 42 113 19 26 62 27 54 15 59 53 32 204 -44 112 56 34 62 11 10 113 42 55 62 44 44 112 3 57 61 31 27 114 41 51 63 25 34 112 3 59 63 12 13 16 0 2 31 202 -43 111 41 5 62 55 7 112 27 30 63 29 25 110 48 29 62 14 33 113 26 40 64 11 12 110 45 57 63 57 16 16 0 11 31 201 -42 110 23 2 63 39 46 111 9 30 64 14 52 109 30 32 62 58 19 112 8 52 64 57 40 109 25 0 64 43 5 16 0 20 30 199 -41 109 2 8 64 25 11 109 48 33 65 1 8 108 9 47 63 42 46 110 48 2 65 45 0 108 0 45 65 29 45 16 0 29 30 197 -40 107 37 58 65 11 24 108 24 15 65 48 15 106 45 55 64 27 57 109 23 45 66 33 18 106 32 44 66 17 18 16 0 38 29 196 -39 106 10 5 65 58 28 106 56 7 66 36 18 105 18 28 65 13 56 107 55 30 67 22 36 105 0 22 67 5 49 16 0 47 28 194 -38 104 37 56 66 46 28 105 23 33 67 25 22 103 46 57 66 0 45 106 22 37 68 13 2 103 22 58 67 55 22 16 0 56 28 192 -37 103 0 52 67 35 28 103 45 51 68 15 29 102 10 46 66 48 28 104 44 19 69 4 38 101 39 42 68 46 2 16 1 4 27 190 -36 101 18 5 68 25 31 102 2 7 69 6 47 100 29 13 67 37 8 102 59 38 69 57 33 99 49 31 69 37 54 16 1 13 26 188 -35 99 28 35 69 16 43 100 11 17 69 59 20 98 41 23 68 26 51 101 7 19 70 51 53 97 51 7 70 31 4 16 1 22 26 186 -34 97 31 8 70 9 9 98 11 56 70 53 16 96 46 13 69 17 39 99 5 45 71 47 46 95 42 48 71 25 38 16 1 31 25 183 -33 95 24 9 71 2 55 96 2 17 71 48 40 94 42 20 70 9 38 96 52 51 72 45 21 93 22 24 72 21 43 16 1 40 24 181 -32 93 5 36 71 58 7 93 39 59 72 45 41 92 28 1 71 2 54 94 25 46 73 44 47 90 47 0 73 19 27 16 1 49 23 178 -30 90 32 48 72 54 53 91 1 51 73 44 26 90 1 1 71 57 30 91 40 34 74 46 16 87 52 36 74 18 57 16 1 58 22 175 -29 87 42 7 73 53 18 88 3 31 74 45 6 87 18 25 72 53 33 88 31 40 75 49 59 84 33 39 75 20 21 16 2 7 21 172 -28 84 28 32 74 53 29 84 38 45 75 47 46 84 16 13 73 51 6 84 50 48 76 56 8 80 42 3 76 23 42 16 2 16 19 168 -26 80 44 53 75 55 30 80 38 23 76 52 34 80 48 58 74 50 13 80 25 11 78 4 49 76 5 40 77 29 1 16 2 25 18 163 -25 76 20 36 76 59 20 75 48 21 77 59 28 76 48 51 75 50 53 74 53 58 79 16 2 70 25 25 78 36 3 16 2 34 17 157 -23 70 59 27 78 4 48 69 46 0 79 8 10 72 4 29 76 52 59 67 41 7 80 29 16 63 9 55 79 44 2 16 2 43 15 150 -21 64 15 26 79 11 17 61 52 56 80 17 43 66 18 28 77 56 7 57 40 5 81 42 36 53 24 51 80 50 50 16 2 52 13 140 -20 55 24 49 80 17 7 51 0 35 81 25 18 59 3 20 78 59 18 42 41 29 82 50 5 39 32 51 81 50 48 16 3 1 11 126 -17 43 11 10 81 18 6 35 3 9 82 23 4 49 33 48 80 0 19 18 44 36 83 32 5 18 41 10 82 27 41 16 3 10 8 106 -15 25 19 25 82 2 54 10 19 56 82 46 56 36 32 51 80 53 44 - 21 21 19 82 25 3 - 15 26 46 81 37 36 16 3 19 3 72 -10 - 2 23 29 81 54 49 ... .. .. .. .. .. 17 45 17 81 25 25 ... .. .. .. .. .. Data for the target star ------------------------ * name: TYC 0174-01664-1 * constellation : Monoceros * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 04 19.1137 DE: +06 06 55.792 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .037 ) * V mag [mag]: 11.2 * B mag [mag]: 11.6 * Apparent position with proper motion RA(deg): 106.1957786208 DE(deg): 6.1033888444 * Equation of equinoxes (radians) : 0.000045414598933 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (219) Thusnelda approx. diameter [km]: 40 approx. diameter ["]: .031 distance from Earth [AU]: 1.75200 * orbital information: orbit source: Preston date of fit: 2008 Jan 02 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 837 number of rejected observations: 109 time covered by the observations: 1913 Dec 19 - 2007 Dec 15 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.013, 98° remarks: * orbital elements for (219) Thusnelda : Mean anomaly = 112.52297525 deg Arg. of pericenter = 142.30199984 deg Long. of node = 200.94564085 deg Inclination = 10.84126215 deg Eccentricity = 0.22322002 Semimajor axis = 2.35441346 AU Perihelion dist = 1.82886124 AU Mag: H = 9.10, G = 0.15 Epoch of elements : MJD 54499.66500000 TDT (2008 Feb 03.665) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Feb 03 219 Thusnelda 15h 57.5m UT 11.2 7 4 19.114 6 6 55.79TYC 0174-01664-1 11.6 13.3 40 3.8 1.752 -1.767 13.46 93.495 6.113 304.08 -16.57 15.9583 .36970 .72535 -5.25519 2.68135 0.00285 0.00116 2000 109.8861462008 125.00000142.302000200.945641 10.8412620.223220022.354413461.828861249.325 0.15 RATE 2.7282240 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.039 0.030 0.9 2.200 0.037 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 04, 01:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org