IOTA/IOTA-ES occultation update for (173) Ino / 2UCAC 31182368 event on 2008 Jul 06, 08:05 UT Visible from W USA Summary ------- On 2008 Jul 06 UT, the 154 km diameter asteroid (173) Ino will occult a 12.8 mag star in the constellation Serpens for observers along a path across W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 12.7 mag (the magnitude of the asteroid) for at most 18.2 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: 99 * date and approx. time of event: 2008 Jul 06, 07:53 - 2008 Jul 06, 08:15 UT * magnitude of target star: 12.8 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 18.2 * Moon: 14 % sunlit, 91° distance * Sun: 132° distance * rough path description: W USA The occultation path -------------------- * approximate projected width [km]: 156 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 6.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .032", 91° ) * approx speed of asteroid's shadow [km/s]: 8.4496 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 31182368 by 173 Ino on 2008 Jul 6 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 - 84 29 21 44 0 0 7 53 22 8 259 -17 - 89 47 10 - 76 15 34 - 92 40 52 ... .. .. - 91 30 13 43 0 0 7 53 34 13 255 -20 - 95 27 22 - 86 46 40 - 97 47 47 - 82 52 20 Latitude Latitude Latitude Latitude - 93 0 0 42 44 16 7 53 38 15 254 -21 43 27 49 42 0 49 43 56 37 41 32 12 - 94 0 0 42 33 11 7 53 41 15 253 -22 43 16 50 41 49 38 43 45 42 41 20 56 - 95 0 0 42 21 37 7 53 43 16 252 -22 43 5 23 41 37 57 43 34 19 41 9 11 - 96 0 0 42 9 35 7 53 46 17 252 -22 42 53 27 41 25 48 43 22 28 40 56 58 - 97 0 0 41 57 4 7 53 49 18 251 -23 42 41 4 41 13 11 43 10 9 40 44 16 - 98 0 0 41 44 5 7 53 52 18 250 -23 42 28 11 41 0 4 42 57 21 40 31 5 - 99 0 0 41 30 36 7 53 56 19 250 -24 42 14 50 40 46 29 42 44 5 40 17 24 -100 0 0 41 16 39 7 53 59 20 249 -24 42 1 0 40 32 24 42 30 20 40 3 15 -101 0 0 41 2 12 7 54 3 21 248 -25 41 46 41 40 17 50 42 16 6 39 48 35 -102 0 0 40 47 16 7 54 6 21 248 -25 41 31 53 40 2 46 42 1 23 39 33 26 -103 0 0 40 31 50 7 54 10 22 247 -26 41 16 35 39 47 12 41 46 11 39 17 47 -104 0 0 40 15 55 7 54 14 23 246 -26 41 0 48 39 31 8 41 30 29 39 1 38 -105 0 0 39 59 29 7 54 19 24 246 -26 40 44 31 39 14 34 41 14 17 38 44 59 -106 0 0 39 42 34 7 54 23 25 245 -27 40 27 43 38 57 30 40 57 36 38 27 50 -107 0 0 39 25 8 7 54 28 25 244 -27 40 10 26 38 39 56 40 40 24 38 10 10 -108 0 0 39 7 11 7 54 32 26 244 -28 39 52 38 38 21 51 40 22 42 37 51 59 -109 0 0 38 48 44 7 54 37 27 243 -28 39 34 20 38 3 15 40 4 30 37 33 17 -110 0 0 38 29 47 7 54 42 28 242 -29 39 15 31 37 44 9 39 45 47 37 14 5 -111 0 0 38 10 18 7 54 48 29 242 -29 38 56 12 37 24 31 39 26 33 36 54 21 -112 0 0 37 50 18 7 54 53 30 241 -29 38 36 21 37 4 22 39 6 49 36 34 7 -113 0 0 37 29 47 7 54 59 30 240 -30 38 16 0 36 43 42 38 46 34 36 13 21 -114 0 0 37 8 45 7 55 5 31 240 -30 37 55 7 36 22 31 38 25 47 35 52 3 -115 0 0 36 47 12 7 55 11 32 239 -31 37 33 43 36 0 48 38 4 29 35 30 14 -116 0 0 36 25 7 7 55 17 33 239 -31 37 11 47 35 38 34 37 42 40 35 7 54 -117 0 0 36 2 30 7 55 23 34 238 -31 36 49 20 35 15 48 37 20 19 34 45 2 -118 0 0 35 39 22 7 55 30 35 237 -32 36 26 21 34 52 30 36 57 27 34 21 38 -119 0 0 35 15 42 7 55 37 36 237 -32 36 2 51 34 28 41 36 34 3 33 57 43 -120 0 0 34 51 31 7 55 44 36 236 -33 35 38 49 34 4 20 36 10 7 33 33 16 -121 0 0 34 26 48 7 55 51 37 235 -33 35 14 16 33 39 28 35 45 40 33 8 17 -122 0 0 34 1 33 7 55 58 38 235 -33 34 49 10 33 14 4 35 20 41 32 42 47 -123 0 0 33 35 47 7 56 6 39 234 -34 34 23 34 32 48 8 34 55 10 32 16 45 -124 0 0 33 9 29 7 56 14 40 233 -34 33 57 25 32 21 41 34 29 8 31 50 12 -125 0 0 32 42 40 7 56 22 41 233 -34 33 30 45 31 54 42 34 2 34 31 23 8 -126 0 0 32 15 19 7 56 30 42 232 -35 33 3 34 31 27 13 33 35 29 30 55 32 -127 0 0 31 47 27 7 56 38 43 232 -35 32 35 51 30 59 12 33 7 53 30 27 25 -128 0 0 31 19 4 7 56 47 44 231 -35 32 7 37 30 30 40 32 39 45 29 58 47 -129 0 0 30 50 11 7 56 56 45 230 -36 31 38 53 30 1 37 32 11 6 29 29 39 -130 0 0 30 20 46 7 57 5 46 230 -36 31 9 37 29 32 4 31 41 57 29 0 0 -131 0 0 29 50 52 7 57 14 47 229 -36 30 39 52 29 2 1 31 12 17 28 29 51 -132 0 0 29 20 27 7 57 24 48 228 -36 30 9 35 28 31 28 30 42 6 27 59 13 -133 0 0 28 49 33 7 57 34 49 228 -37 29 38 49 28 0 25 30 11 26 27 28 5 -134 0 0 28 18 9 7 57 44 50 227 -37 29 7 34 27 28 54 29 40 16 26 56 27 -135 0 0 27 46 17 7 57 54 50 226 -37 28 35 49 26 56 53 29 8 37 26 24 22 -136 0 0 27 13 55 7 58 4 51 226 -37 28 3 36 26 24 24 28 36 29 25 51 48 -137 0 0 26 41 6 7 58 15 52 225 -38 27 30 54 25 51 27 28 3 52 25 18 46 -138 0 0 26 7 49 7 58 26 53 224 -38 26 57 45 25 18 3 27 30 48 24 45 17 -139 0 0 25 34 6 7 58 37 54 223 -38 26 24 8 24 44 12 26 57 16 24 11 22 -140 0 0 24 59 55 7 58 48 55 223 -38 25 50 5 24 9 55 26 23 17 23 37 0 -141 0 0 24 25 19 7 59 0 56 222 -38 25 15 36 23 35 13 25 48 52 23 2 13 -142 0 0 23 50 18 7 59 11 57 221 -38 24 40 41 23 0 5 25 14 1 22 27 2 -143 0 0 23 14 53 7 59 23 59 220 -38 24 5 21 22 24 34 24 38 46 21 51 26 -144 0 0 22 39 3 7 59 35 60 219 -39 23 29 38 21 48 39 24 3 6 21 15 28 -145 0 0 22 2 51 7 59 47 61 219 -39 22 53 31 21 12 21 23 27 3 20 39 6 -146 0 0 21 26 17 8 0 0 62 218 -39 22 17 1 20 35 42 22 50 37 20 2 24 -147 0 0 20 49 21 8 0 13 63 217 -39 21 40 11 19 58 41 22 13 49 19 25 20 -148 0 0 20 12 5 8 0 26 64 216 -39 21 2 59 19 21 21 21 36 40 18 47 57 -149 0 0 19 34 29 8 0 39 65 215 -39 20 25 27 18 43 41 20 59 11 18 10 14 -150 0 0 18 56 35 8 0 52 66 213 -39 19 47 37 18 5 43 20 21 23 17 32 14 -151 0 0 18 18 23 8 1 5 67 212 -39 19 9 28 17 27 28 19 43 17 16 53 56 -152 0 0 17 39 55 8 1 19 68 211 -39 18 31 3 16 48 56 19 4 54 16 15 23 -153 0 0 17 1 11 8 1 32 69 209 -38 17 52 22 16 10 9 18 26 14 15 36 34 -154 0 0 16 22 12 8 1 46 70 208 -38 17 13 25 15 31 9 17 47 20 14 57 32 -155 0 0 15 43 0 8 2 0 71 206 -38 16 34 15 14 51 55 17 8 11 14 18 17 -156 0 0 15 3 36 8 2 14 72 204 -38 15 54 53 14 12 29 16 28 49 13 38 50 -157 0 0 14 24 1 8 2 29 73 202 -38 15 15 19 13 32 52 15 49 16 12 59 12 -158 0 0 13 44 15 8 2 43 74 200 -38 14 35 34 12 53 6 15 9 32 12 19 25 -159 0 0 13 4 21 8 2 57 74 198 -37 13 55 40 12 13 11 14 29 38 11 39 30 -160 0 0 12 24 19 8 3 12 75 195 -37 13 15 38 11 33 9 13 49 36 10 59 28 -161 0 0 11 44 10 8 3 27 76 192 -37 12 35 29 10 53 1 13 9 27 10 19 20 -162 0 0 11 3 57 8 3 42 77 188 -37 11 55 15 10 12 48 12 29 12 9 39 7 -163 0 0 10 23 39 8 3 56 78 184 -36 11 14 56 9 32 31 11 48 53 8 58 51 -164 0 0 9 43 18 8 4 11 79 180 -36 10 34 34 8 52 12 11 8 30 8 18 33 -165 0 0 9 2 56 8 4 26 79 175 -36 9 54 10 8 11 51 10 28 5 7 38 14 -166 0 0 8 22 34 8 4 41 80 169 -35 9 13 46 7 31 31 9 47 39 6 57 54 -167 0 0 7 42 12 8 4 56 80 163 -35 8 33 22 6 51 12 9 7 13 6 17 37 -168 0 0 7 1 52 8 5 11 80 156 -35 7 52 59 6 10 55 8 26 49 5 37 22 -169 0 0 6 21 36 8 5 26 81 150 -34 7 12 40 5 30 42 7 46 27 4 57 10 -170 0 0 5 41 24 8 5 41 81 142 -34 6 32 24 4 50 33 7 6 9 4 17 4 -171 0 0 5 1 18 8 5 57 81 136 -33 5 52 14 4 10 31 6 25 57 3 37 4 -172 0 0 4 21 19 8 6 12 80 129 -33 5 12 11 3 30 36 5 45 51 2 57 12 -173 0 0 3 41 28 8 6 27 80 123 -32 4 32 16 2 50 49 5 5 52 2 17 28 -174 0 0 3 1 46 8 6 42 79 117 -32 3 52 29 2 11 12 4 26 3 1 37 54 -175 0 0 2 22 15 8 6 57 79 112 -31 3 12 53 1 31 45 3 46 23 0 58 30 -176 0 0 1 42 55 8 7 12 78 107 -31 2 33 27 0 52 31 3 6 54 0 19 19 -177 0 0 1 3 47 8 7 26 77 103 -30 1 54 14 0 13 29 2 27 37 - 0 19 39 -178 0 0 0 24 54 8 7 41 77 100 -30 1 15 15 - 0 25 19 1 48 34 - 0 58 23 -179 0 0 - 0 13 45 8 7 56 76 96 -29 0 36 30 - 1 3 52 1 9 45 - 1 36 52 -180 0 0 - 0 52 8 8 8 11 75 94 -29 - 0 2 0 - 1 42 9 0 31 11 - 2 15 5 179 0 0 - 1 30 15 8 8 25 74 91 -28 - 0 40 13 - 2 20 8 - 0 7 6 - 2 53 0 178 0 0 - 2 8 3 8 8 40 73 89 -27 - 1 18 8 - 2 57 50 - 0 45 6 - 3 30 38 177 0 0 - 2 45 33 8 8 54 72 87 -27 - 1 55 45 - 3 35 13 - 1 22 48 - 4 7 56 176 0 0 - 3 22 43 8 9 8 71 86 -26 - 2 33 2 - 4 12 16 - 2 0 10 - 4 44 54 175 0 0 - 3 59 33 8 9 22 70 84 -26 - 3 9 59 - 4 48 58 - 2 37 12 - 5 21 32 174 0 0 - 4 36 1 8 9 36 69 83 -25 - 3 46 35 - 5 25 19 - 3 13 53 - 5 57 48 173 0 0 - 5 12 7 8 9 50 68 82 -24 - 4 22 49 - 6 1 18 - 3 50 12 - 6 33 41 172 0 0 - 5 47 50 8 10 4 67 81 -24 - 4 58 40 - 6 36 53 - 4 26 9 - 7 9 11 171 0 0 - 6 23 9 8 10 17 66 80 -23 - 5 34 7 - 7 12 4 - 5 1 41 - 7 44 17 170 0 0 - 6 58 4 8 10 31 65 79 -22 - 6 9 10 - 7 46 51 - 5 36 50 - 8 18 59 169 0 0 - 7 32 34 8 10 44 64 79 -22 - 6 43 48 - 8 21 12 - 6 11 33 - 8 53 14 168 0 0 - 8 6 38 8 10 57 63 78 -21 - 7 18 1 - 8 55 7 - 6 45 51 - 9 27 4 167 0 0 - 8 40 15 8 11 10 62 77 -20 - 7 51 47 - 9 28 36 - 7 19 43 -10 0 28 166 0 0 - 9 13 25 8 11 23 61 77 -20 - 8 25 5 -10 1 38 - 7 53 7 -10 33 24 165 0 0 - 9 46 8 8 11 35 60 77 -19 - 8 57 57 -10 34 12 - 8 26 4 -11 5 52 164 0 0 -10 18 22 8 11 48 59 76 -18 - 9 30 20 -11 6 17 - 8 58 34 -11 37 52 163 0 0 -10 50 8 8 12 0 58 76 -18 -10 2 14 -11 37 54 - 9 30 34 -12 9 23 162 0 0 -11 21 24 8 12 12 57 76 -17 -10 33 40 -12 9 2 -10 2 5 -12 40 25 161 0 0 -11 52 11 8 12 23 56 76 -16 -11 4 36 -12 39 40 -10 33 7 -13 10 57 160 0 0 -12 22 28 8 12 35 55 75 -16 -11 35 2 -13 9 48 -11 3 39 -13 40 59 159 0 0 -12 52 15 8 12 46 54 75 -15 -12 4 57 -13 39 26 -11 33 40 -14 10 31 158 0 0 -13 21 30 8 12 58 53 75 -14 -12 34 22 -14 8 33 -12 3 11 -14 39 32 157 0 0 -13 50 15 8 13 9 52 75 -13 -13 3 16 -14 37 8 -12 32 11 -15 8 2 156 0 0 -14 18 28 8 13 19 51 75 -13 -13 31 38 -15 5 13 -13 0 39 -15 36 0 155 0 0 -14 46 10 8 13 30 50 75 -12 -13 59 28 -15 32 46 -13 28 36 -16 3 27 154 0 0 -15 13 20 8 13 40 49 75 -11 -14 26 47 -15 59 46 -13 56 0 -16 30 22 153 0 0 -15 39 57 8 13 51 48 75 -11 -14 53 33 -16 26 15 -14 22 52 -16 56 45 152 0 0 -16 6 3 8 14 1 47 75 -10 -15 19 47 -16 52 12 -14 49 12 -17 22 36 151 0 0 -16 31 35 8 14 10 46 75 -9 -15 45 29 -17 17 36 -15 14 59 -17 47 54 150 0 0 -16 56 35 8 14 20 45 75 -9 -16 10 37 -17 42 27 -15 40 14 -18 12 40 149 0 0 -17 21 2 8 14 29 44 75 -8 -16 35 13 -18 6 45 -16 4 55 -18 36 53 148 0 0 -17 44 56 8 14 38 43 76 -7 -16 59 16 -18 30 31 -16 29 4 -19 0 33 147 0 0 -18 8 17 8 14 47 42 76 -6 -17 22 45 -18 53 44 -16 52 39 -19 23 40 146 0 0 -18 31 5 8 14 56 41 76 -6 -17 45 41 -19 16 23 -17 15 40 -19 46 14 145 0 0 -18 53 20 8 15 4 40 76 -5 -18 8 4 -19 38 30 -17 38 9 -20 8 15 144 0 0 -19 15 1 8 15 13 39 76 -4 -18 29 54 -20 0 3 -18 0 3 -20 29 43 143 0 0 -19 36 9 8 15 21 38 77 -4 -18 51 10 -20 21 3 -18 21 25 -20 50 38 142 0 0 -19 56 43 8 15 29 37 77 -3 -19 11 52 -20 41 29 -18 42 12 -21 10 59 141 0 0 -20 16 45 8 15 36 36 77 -2 -19 32 1 -21 1 23 -19 2 26 -21 30 48 140 0 0 -20 36 12 8 15 44 35 77 -1 -19 51 36 -21 20 43 -19 22 6 -21 50 3 139 0 0 -20 55 6 8 15 51 34 78 -1 -20 10 37 -21 39 30 -19 41 13 -22 8 45 138 0 0 -21 13 27 8 15 58 33 78 0 -20 29 5 -21 57 43 -19 59 45 -22 26 53 Uncertainty in time = +/- 6 secs [Prediction of 2008 Jul 2.0] Data for the target star ------------------------ * name: 2UCAC 31182368 * constellation : Serpens * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 06 42.4973 DE: -01 45 50.325 * position source: Pos: TMO, pm: , pi: * standard error: RA,DE ["]: ( .030, .030 ) * V mag [mag]: 12.8 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (173) Ino approx. diameter [km]: 154 approx. diameter ["]: .098 distance from Earth [AU]: 2.16900 * orbital information: orbit source: Preston date of fit: 2008 Jul 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 869 number of rejected observations: 108 time covered by the observations: 1903 Mar 26 - 2008 Jun 28 1 sigma uncertainty ellipse (major, minor, PA): 0.013, 0.011, 98° remarks: * orbital elements for (173) Ino : Mean anomaly = 259.56011886 deg Arg. of pericenter = 227.82615052 deg Long. of node = 148.33264076 deg Inclination = 14.20694392 deg Eccentricity = 0.20789483 Semimajor axis = 2.74317505 AU Perihelion dist = 2.17288313 AU Mag: H = 7.59, G = 0.01 Epoch of elements : MJD 54653.33700000 TDT (2008 Jul 06.337) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jul 6 173 Ino 8h 5.6m UT 12.8 16 6 42.497- 1 45 50.322UCAC 31182368 0.0 12.7 154 18.2 2.169 -1.051 -11.18 -164.4099 -1.761 59.80 22.64 8.0937 -0.09422 0.13249 -3.89133 -2.75726 0.00362 -0.00204 2000 258.8362172008 7 3.00000227.826151148.332641 14.2069440.20789483 2.7431751 2.1728831 7.7 5.00.01 RATE 2.1693200 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.032 91 1.33 0.032 0 54649.5020080706_182368 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jul 02, 19:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org