IOTA/IOTA-ES occultation update for (125) Liberatrix / TYC 6237-00630-1 event on 2003 Aug 27, 04:44 UT Visible from USA Summary ------- On 2003 Aug 27 UT, the 43 km diameter asteroid (125) Liberatrix will occult a 10.1 mag star in the constellation Ophiuchus for observers along a path across USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.2 mag to 13.2 mag (the magnitude of the asteroid) for at most 4.2 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, historical astrometry from AstDys, and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 70 * date and approx. time of event: 2003 Aug 27, 04:38 - 2003 Aug 27, 04:49 UT * magnitude of target star: 10.1 * magnitude drop [mag]: 3.2 * estimated maximum duration [s]: 4.2 * Moon: 1 % sunlit, 113° distance * Sun: 106° distance * rough path description: USA The occultation path -------------------- * approximate projected width [km]: 83 * 1 sigma uncertainty interval [path widths]: +/- 0.83 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .025 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .025", .024", 92° ) * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6237-00630-1 by 125 Liberatrix on 2003 Aug 27 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 179 0 0 .. .. .. .. .. .. .. .. .. 67 50 36 .. .. .. 67 50 36 .. .. .. 180 0 0 67 56 46 4 38 29 1 147 17 67 17 36 68 37 20 67 17 36 68 37 20 -179 0 0 67 23 1 4 38 29 1 148 17 66 44 2 68 3 21 66 44 2 68 3 21 -178 0 0 66 48 42 4 38 29 2 149 17 66 9 56 67 28 48 66 9 56 67 28 48 -177 0 0 66 13 52 4 38 30 3 150 16 65 35 20 66 53 43 65 35 20 66 53 43 -176 0 0 65 38 33 4 38 31 3 151 16 65 0 15 66 18 7 65 0 15 66 18 7 -175 0 0 65 2 46 4 38 32 4 151 16 64 24 44 65 42 3 64 24 44 65 42 3 -174 0 0 64 26 34 4 38 33 5 152 16 63 48 49 65 5 32 63 48 49 65 5 32 -173 0 0 63 49 59 4 38 34 6 153 15 63 12 32 64 28 38 63 12 32 64 28 38 -172 0 0 63 13 3 4 38 36 6 154 15 62 35 54 63 51 22 62 35 54 63 51 22 -171 0 0 62 35 48 4 38 38 7 155 14 61 58 58 63 13 46 61 58 58 63 13 46 -170 0 0 61 58 17 4 38 40 8 156 14 61 21 46 62 35 54 61 21 46 62 35 54 -169 0 0 61 20 32 4 38 42 9 157 14 60 44 21 61 57 47 60 44 21 61 57 47 -168 0 0 60 42 34 4 38 45 9 158 13 60 6 44 61 19 28 60 6 44 61 19 28 -167 0 0 60 4 28 4 38 48 10 159 13 59 28 57 60 40 58 59 28 57 60 40 58 -166 0 0 59 26 13 4 38 51 11 160 12 58 51 4 60 2 22 58 51 4 60 2 22 -165 0 0 58 47 54 4 38 54 12 161 12 58 13 5 59 23 40 58 13 5 59 23 40 -164 0 0 58 9 32 4 38 58 13 162 11 57 35 4 58 44 55 57 35 4 58 44 55 -163 0 0 57 31 9 4 39 2 13 163 11 56 57 2 58 6 9 56 57 2 58 6 9 -162 0 0 56 52 48 4 39 6 14 163 10 56 19 2 57 27 25 56 19 2 57 27 25 -161 0 0 56 14 30 4 39 10 15 164 9 55 41 6 56 48 45 55 41 6 56 48 45 -160 0 0 55 36 18 4 39 15 16 165 9 55 3 15 56 10 10 55 3 15 56 10 10 -159 0 0 54 58 15 4 39 20 16 166 8 54 25 31 55 31 44 54 25 31 55 31 44 -158 0 0 54 20 20 4 39 25 17 167 7 53 47 58 54 53 28 53 47 58 54 53 28 -157 0 0 53 42 38 4 39 31 18 168 7 53 10 36 54 15 24 53 10 36 54 15 24 -156 0 0 53 5 9 4 39 36 19 169 6 52 33 28 53 37 33 52 33 28 53 37 33 -155 0 0 52 27 56 4 39 42 19 170 5 51 56 34 52 59 59 51 56 34 52 59 59 -154 0 0 51 51 0 4 39 49 20 171 5 51 19 58 52 22 42 51 19 58 52 22 42 -153 0 0 51 14 24 4 39 55 21 172 4 50 43 41 51 45 45 50 43 41 51 45 45 -152 0 0 50 38 8 4 40 2 21 173 3 50 7 43 51 9 9 50 7 43 51 9 9 -151 0 0 50 2 14 4 40 9 22 174 2 49 32 8 50 32 55 49 32 8 50 32 55 -150 0 0 49 26 44 4 40 16 23 175 2 48 56 57 49 57 6 48 56 57 49 57 6 -149 0 0 48 51 39 4 40 23 23 176 1 48 22 10 49 21 42 48 22 10 49 21 42 -148 0 0 48 17 1 4 40 31 24 177 0 47 47 50 48 46 46 47 47 50 48 46 46 -147 0 0 47 42 52 4 40 38 25 179 -1 47 13 57 48 12 18 47 13 57 48 12 18 -146 0 0 47 9 11 4 40 46 25 180 -2 46 40 34 47 38 20 46 40 34 47 38 20 -145 0 0 46 36 2 4 40 54 26 181 -3 46 7 40 47 4 53 46 7 40 47 4 53 -144 0 0 46 3 24 4 41 2 26 182 -3 45 35 18 46 31 59 45 35 18 46 31 59 -143 0 0 45 31 19 4 41 11 27 183 -4 45 3 29 45 59 37 45 3 29 45 59 37 -142 0 0 44 59 48 4 41 19 27 184 -5 44 32 14 45 27 51 44 32 14 45 27 51 -141 0 0 44 28 53 4 41 28 28 185 -6 44 1 33 44 56 40 44 1 33 44 56 40 -140 0 0 43 58 33 4 41 37 28 186 -7 43 31 27 44 26 5 43 31 27 44 26 5 -139 0 0 43 28 50 4 41 46 29 187 -8 43 1 59 43 56 7 43 1 59 43 56 7 -138 0 0 42 59 46 4 41 55 29 189 -9 42 33 7 43 26 48 42 33 7 43 26 48 -137 0 0 42 31 19 4 42 4 29 190 -10 42 4 54 42 58 8 42 4 54 42 58 8 -136 0 0 42 3 32 4 42 13 30 191 -10 41 37 20 42 30 8 41 37 20 42 30 8 -135 0 0 41 36 25 4 42 22 30 192 -11 41 10 26 42 2 48 41 10 26 42 2 48 -134 0 0 41 9 59 4 42 32 30 193 -12 40 44 11 41 36 10 40 44 11 41 36 10 -133 0 0 40 44 15 4 42 41 30 194 -13 40 18 38 41 10 13 40 18 38 41 10 13 -132 0 0 40 19 12 4 42 50 31 196 -14 39 53 47 40 44 58 39 53 47 40 44 58 -131 0 0 39 54 52 4 43 0 31 197 -15 39 29 37 40 20 27 39 29 37 40 20 27 -130 0 0 39 31 14 4 43 9 31 198 -16 39 6 10 39 56 39 39 6 10 39 56 39 -129 0 0 39 8 20 4 43 19 31 199 -17 38 43 26 39 33 34 38 43 26 39 33 34 -128 0 0 38 46 10 4 43 29 31 200 -18 38 21 26 39 11 14 38 21 26 39 11 14 -127 0 0 38 24 45 4 43 38 31 202 -18 38 0 10 38 49 39 38 0 10 38 49 39 -126 0 0 38 4 3 4 43 48 31 203 -19 37 39 37 38 28 48 37 39 37 38 28 48 -125 0 0 37 44 7 4 43 57 31 204 -20 37 19 50 38 8 43 37 19 50 38 8 43 -124 0 0 37 24 56 4 44 7 31 205 -21 37 0 47 37 49 24 37 0 47 37 49 24 -123 0 0 37 6 31 4 44 16 31 206 -22 36 42 29 37 30 50 36 42 29 37 30 50 -122 0 0 36 48 51 4 44 26 31 207 -23 36 24 57 37 13 3 36 24 57 37 13 3 -121 0 0 36 31 57 4 44 35 31 209 -24 36 8 11 36 56 1 36 8 11 36 56 1 -120 0 0 36 15 50 4 44 44 30 210 -24 35 52 10 36 39 47 35 52 10 36 39 47 -119 0 0 36 0 28 4 44 54 30 211 -25 35 36 55 36 24 19 35 36 55 36 24 19 -118 0 0 35 45 54 4 45 3 30 212 -26 35 22 27 36 9 37 35 22 27 36 9 37 -117 0 0 35 32 5 4 45 12 30 213 -27 35 8 44 35 55 43 35 8 44 35 55 43 -116 0 0 35 19 4 4 45 21 30 214 -28 34 55 48 35 42 36 34 55 48 35 42 36 -115 0 0 35 6 49 4 45 30 29 215 -29 34 43 39 35 30 16 34 43 39 35 30 16 -114 0 0 34 55 21 4 45 39 29 216 -29 34 32 16 35 18 43 34 32 16 35 18 43 -113 0 0 34 44 40 4 45 48 28 217 -30 34 21 39 35 7 57 34 21 39 35 7 57 -112 0 0 34 34 46 4 45 56 28 218 -31 34 11 50 34 57 59 34 11 50 34 57 59 -111 0 0 34 25 39 4 46 5 28 219 -32 34 2 47 34 48 48 34 2 47 34 48 48 -110 0 0 34 17 19 4 46 13 27 220 -32 33 54 30 34 40 24 33 54 30 34 40 24 -109 0 0 34 9 46 4 46 21 27 221 -33 33 47 0 34 32 47 33 47 0 34 32 47 -108 0 0 34 3 0 4 46 29 26 222 -34 33 40 17 34 25 58 33 40 17 34 25 58 -107 0 0 33 57 1 4 46 37 26 223 -34 33 34 21 34 19 56 33 34 21 34 19 56 -106 0 0 33 51 48 4 46 45 25 224 -35 33 29 11 34 14 41 33 29 11 34 14 41 -105 0 0 33 47 23 4 46 53 25 225 -36 33 24 47 34 10 13 33 24 47 34 10 13 -104 0 0 33 43 44 4 47 0 24 226 -36 33 21 10 34 6 33 33 21 10 34 6 33 -103 0 0 33 40 52 4 47 7 24 226 -37 33 18 20 34 3 39 33 18 20 34 3 39 -102 0 0 33 38 47 4 47 14 23 227 -37 33 16 16 34 1 32 33 16 16 34 1 32 -101 0 0 33 37 28 4 47 21 22 228 -38 33 14 58 34 0 13 33 14 58 34 0 13 -100 0 0 33 36 55 4 47 28 22 229 -39 33 14 26 33 59 39 33 14 26 33 59 39 - 99 0 0 33 37 9 4 47 34 21 230 -39 33 14 40 33 59 53 33 14 40 33 59 53 - 98 0 0 33 38 9 4 47 41 20 230 -40 33 15 41 34 0 53 33 15 41 34 0 53 - 97 0 0 33 39 56 4 47 47 20 231 -40 33 17 27 34 2 39 33 17 27 34 2 39 - 96 0 0 33 42 28 4 47 53 19 232 -40 33 19 58 34 5 12 33 19 58 34 5 12 - 95 0 0 33 45 46 4 47 58 18 233 -41 33 23 16 34 8 31 33 23 16 34 8 31 - 94 0 0 33 49 50 4 48 4 18 233 -41 33 27 18 34 12 36 33 27 18 34 12 36 - 93 0 0 33 54 39 4 48 9 17 234 -42 33 32 6 34 17 27 33 32 6 34 17 27 - 92 0 0 34 0 14 4 48 14 16 235 -42 33 37 39 34 23 3 33 37 39 34 23 3 - 91 0 0 34 6 34 4 48 19 15 235 -42 33 43 57 34 29 25 33 43 57 34 29 25 - 90 0 0 34 13 39 4 48 24 15 236 -42 33 51 0 34 36 32 33 51 0 34 36 32 - 89 0 0 34 21 29 4 48 28 14 237 -43 33 58 48 34 44 25 33 58 48 34 44 25 - 88 0 0 34 30 3 4 48 32 13 237 -43 34 7 19 34 53 2 34 7 19 34 53 2 - 87 0 0 34 39 22 4 48 36 12 238 -43 34 16 35 35 2 24 34 16 35 35 2 24 - 86 0 0 34 49 25 4 48 40 11 239 -43 34 26 35 35 12 31 34 26 35 35 12 31 - 85 0 0 35 0 13 4 48 43 11 239 -43 34 37 19 35 23 22 34 37 19 35 23 22 - 84 0 0 35 11 44 4 48 46 10 240 -43 34 48 46 35 34 58 34 48 46 35 34 58 - 83 0 0 35 23 59 4 48 49 9 241 -43 35 0 57 35 47 17 35 0 57 35 47 17 - 82 0 0 35 36 57 4 48 52 8 241 -43 35 13 50 36 0 20 35 13 50 36 0 20 - 81 0 0 35 50 38 4 48 54 7 242 -43 35 27 27 36 14 6 35 27 27 36 14 6 - 80 0 0 36 5 2 4 48 56 7 242 -43 35 41 46 36 28 36 35 41 46 36 28 36 - 79 0 0 36 20 9 4 48 58 6 243 -43 35 56 47 36 43 48 35 56 47 36 43 48 - 78 0 0 36 35 58 4 49 0 5 244 -43 36 12 30 36 59 43 36 12 30 36 59 43 - 77 0 0 36 52 29 4 49 1 4 244 -43 36 28 55 37 16 20 36 28 55 37 16 20 - 76 0 0 37 9 41 4 49 2 3 245 -43 36 46 1 37 33 39 36 46 1 37 33 39 - 75 0 0 37 27 35 4 49 3 2 245 -42 37 3 48 37 51 40 37 3 48 37 51 40 - 74 0 0 37 46 10 4 49 4 1 246 -42 37 22 16 38 10 22 37 22 16 38 10 22 - 73 0 0 38 5 25 4 49 4 1 247 -42 37 41 24 38 29 45 37 41 24 38 29 45 Data for the target star ------------------------ * name: TYC 6237-00630-1 * constellation : Ophiuchus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 18 10.3389 DE: -17 48 05.059 * position source: Pos: UCAC2, pm: UCAC2, pi: * standard error: RA,DE ["]: ( .018, .019 ) * V mag [mag]: 10.1 * remarks: Data for the minor planet ------------------------- * general information: number,name: (125) Liberatrix approx. diameter [km]: 43 approx. diameter ["]: .029 * orbital information: orbit source: Preston date of fit: 2003 Aug 04 source of used astrometry: FASTT Astdys number of used observations: 678 number of rejected observations: 54 time covered by the observations: 1903 Jun 30 - 2003 Jul 08 1 sigma uncertainty ellipse (major, minor, PA): 0.018, 0.014, 93° remarks: * orbital elements for (125) Liberatrix : Mean anomaly = 2.63081159 deg Arg. of pericenter = 110.32025910 deg Long. of node = 169.17030901 deg Inclination = 4.65518861 deg Eccentricity = 0.08054647 Semimajor axis = 2.74299880 AU Perihelion dist = 2.52205992 AU Mag: H = 8.83, G = 0.33 Epoch of elements : MJD 52878.19700000 TDT (2003 Aug 27.197) ------ occelmnt file for Occult BEGIN ------------------------------------ 2003 Aug 27 125 Liberatrix 4h 43.7m UT 10.1 17 18 10.339-17 48 5.06TYC 6237-00630-1 0.0 13.2 43 4.2 2.042 1.668 -7.94 213.591 -17.798 109.50 10.21 4.7291 .26980 .81138 5.52932 -1.84508 0.00530 -0.00053 2000 0.852448192003 819.00000110.320259169.170309 4.6551890.080546472.742998802.522059928.835 0.33 RATE 2.1695300 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ------ occelmnt file for Occult END ------------------------------------ ============================================ Calculator (s): Steve Preston Date of update: 2003 Aug 04, 16:22 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@ acm.org