IOTA/IOTA-ES occultation update for (419) Aurelia / UCAC2 36048195 event on 2009 Aug 07, 17:19 UT Visible from Summary ------- On 2009 Aug 07 UT, the 129 km diameter asteroid (419) Aurelia will occult a 11.7 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.3 mag to 12.6 mag (the magnitude of the asteroid) for at most 31.2 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: UCAC. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2009 Aug 07, 16:55 - 2009 Aug 07, 17:28 UT * magnitude of target star: 11.7 * magnitude drop [mag]: 1.3 * estimated maximum duration [s]: 31.2 * Moon: 98 % sunlit, 49° distance * Sun: 113° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 135 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 9.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .026", 83° ) * approx speed of asteroid's shadow [km/s]: 4.1290 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 36048195 by 419 Aurelia 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 ' " Latitude Latitude Latitude Latitude 91 0 0 -45 1 44 16 55 18 0 73 -58 .. .. .. -44 23 42 .. .. .. -44 3 13 92 0 0 -44 48 6 16 55 18 1 72 -59 -45 26 22 -44 9 58 -45 47 5 -43 49 26 93 0 0 -44 34 1 16 55 18 2 71 -59 -45 12 22 -43 55 47 -45 33 9 -43 35 12 94 0 0 -44 19 28 16 55 19 2 70 -60 -44 57 56 -43 41 8 -45 18 45 -43 20 29 95 0 0 -44 4 27 16 55 20 3 70 -60 -44 43 1 -43 26 1 -45 3 54 -43 5 19 96 0 0 -43 48 58 16 55 21 4 69 -61 -44 27 39 -43 10 26 -44 48 35 -42 49 40 97 0 0 -43 33 1 16 55 23 5 68 -61 -44 11 48 -42 54 22 -44 32 48 -42 33 33 98 0 0 -43 16 34 16 55 25 5 68 -62 -43 55 28 -42 37 49 -44 16 32 -42 16 56 99 0 0 -42 59 39 16 55 27 6 67 -62 -43 38 40 -42 20 46 -43 59 48 -41 59 50 100 0 0 -42 42 14 16 55 30 7 66 -63 -43 21 22 -42 3 15 -43 42 34 -41 42 15 101 0 0 -42 24 20 16 55 33 8 66 -63 -43 3 35 -41 45 13 -43 24 51 -41 24 9 102 0 0 -42 5 55 16 55 36 9 65 -64 -42 45 18 -41 26 41 -43 6 38 -41 5 33 103 0 0 -41 47 1 16 55 39 9 64 -64 -42 26 31 -41 7 39 -42 47 55 -40 46 27 104 0 0 -41 27 35 16 55 43 10 64 -65 -42 7 13 -40 48 6 -42 28 41 -40 26 50 105 0 0 -41 7 39 16 55 48 11 63 -65 -41 47 24 -40 28 2 -42 8 57 -40 6 42 106 0 0 -40 47 11 16 55 52 12 62 -65 -41 27 5 -40 7 26 -41 48 41 -39 46 2 107 0 0 -40 26 12 16 55 58 13 62 -66 -41 6 14 -39 46 19 -41 27 54 -39 24 51 108 0 0 -40 4 41 16 56 3 14 61 -66 -40 44 51 -39 24 40 -41 6 36 -39 3 7 109 0 0 -39 42 38 16 56 9 15 60 -66 -40 22 56 -39 2 29 -40 44 46 -38 40 52 110 0 0 -39 20 3 16 56 15 15 59 -67 -40 0 29 -38 39 46 -40 22 23 -38 18 4 111 0 0 -38 56 55 16 56 22 16 59 -67 -39 37 30 -38 16 30 -39 59 28 -37 54 43 112 0 0 -38 33 15 16 56 30 17 58 -67 -39 13 58 -37 52 41 -39 36 1 -37 30 50 113 0 0 -38 9 1 16 56 37 18 57 -68 -38 49 53 -37 28 19 -39 12 1 -37 6 23 114 0 0 -37 44 14 16 56 45 19 57 -68 -38 25 14 -37 3 23 -38 47 27 -36 41 23 115 0 0 -37 18 54 16 56 54 20 56 -68 -38 0 3 -36 37 54 -38 22 20 -36 15 50 116 0 0 -36 53 0 16 57 3 21 55 -68 -37 34 18 -36 11 52 -37 56 40 -35 49 43 117 0 0 -36 26 33 16 57 13 22 55 -68 -37 7 59 -35 45 16 -37 30 26 -35 23 2 118 0 0 -35 59 32 16 57 23 23 54 -68 -36 41 7 -35 18 6 -37 3 38 -34 55 47 119 0 0 -35 31 57 16 57 34 24 53 -68 -36 13 40 -34 50 22 -36 36 17 -34 27 59 120 0 0 -35 3 48 16 57 45 25 53 -68 -35 45 40 -34 22 4 -36 8 21 -33 59 36 121 0 0 -34 35 5 16 57 57 26 52 -68 -35 17 6 -33 53 13 -35 39 52 -33 30 40 122 0 0 -34 5 48 16 58 9 27 51 -68 -34 47 58 -33 23 47 -35 10 48 -33 1 10 123 0 0 -33 35 57 16 58 22 28 51 -67 -34 18 16 -32 53 48 -34 41 11 -32 31 6 124 0 0 -33 5 33 16 58 36 29 50 -67 -33 48 0 -32 23 15 -34 11 0 -32 0 29 125 0 0 -32 34 35 16 58 50 30 49 -67 -33 17 11 -31 52 9 -33 40 15 -31 29 18 126 0 0 -32 3 4 16 59 4 31 49 -66 -32 45 48 -31 20 29 -33 8 57 -30 57 34 127 0 0 -31 30 59 16 59 20 32 48 -66 -32 13 52 -30 48 16 -32 37 5 -30 25 16 128 0 0 -30 58 22 16 59 36 33 47 -65 -31 41 23 -30 15 31 -32 4 41 -29 52 27 129 0 0 -30 25 12 16 59 52 34 47 -65 -31 8 21 -29 42 13 -31 31 43 -29 19 5 130 0 0 -29 51 30 17 0 10 35 46 -64 -30 34 47 -29 8 24 -30 58 14 -28 45 11 131 0 0 -29 17 17 17 0 27 36 45 -64 -30 0 41 -28 34 3 -30 24 12 -28 10 46 132 0 0 -28 42 33 17 0 46 37 45 -63 -29 26 5 -27 59 11 -29 49 39 -27 35 50 133 0 0 -28 7 18 17 1 5 38 44 -63 -28 50 57 -27 23 49 -29 14 36 -27 0 24 134 0 0 -27 31 33 17 1 25 39 43 -62 -28 15 20 -26 47 58 -28 39 2 -26 24 29 135 0 0 -26 55 20 17 1 45 40 42 -61 -27 39 13 -26 11 37 -28 2 59 -25 48 5 136 0 0 -26 18 39 17 2 7 41 42 -60 -27 2 38 -25 34 50 -27 26 28 -25 11 14 137 0 0 -25 41 30 17 2 28 42 41 -59 -26 25 35 -24 57 35 -26 49 29 -24 33 56 138 0 0 -25 3 55 17 2 51 44 40 -59 -25 48 6 -24 19 54 -26 12 3 -23 56 12 139 0 0 -24 25 55 17 3 14 45 39 -58 -25 10 12 -23 41 49 -25 34 11 -23 18 4 140 0 0 -23 47 31 17 3 38 46 38 -57 -24 31 53 -23 3 20 -24 55 55 -22 39 32 141 0 0 -23 8 44 17 4 2 47 38 -56 -23 53 11 -22 24 28 -24 17 15 -22 0 39 142 0 0 -22 29 36 17 4 28 48 37 -55 -23 14 7 -21 45 16 -23 38 14 -21 21 24 143 0 0 -21 50 7 17 4 53 49 36 -54 -22 34 42 -21 5 44 -22 58 51 -20 41 50 144 0 0 -21 10 20 17 5 20 50 35 -53 -21 54 59 -20 25 53 -22 19 10 -20 1 58 145 0 0 -20 30 16 17 5 47 51 34 -52 -21 14 57 -19 45 46 -21 39 10 -19 21 49 146 0 0 -19 49 57 17 6 15 53 33 -51 -20 34 40 -19 5 24 -20 58 54 -18 41 26 147 0 0 -19 9 23 17 6 43 54 32 -50 -19 54 9 -18 24 49 -20 18 24 -18 0 49 148 0 0 -18 28 38 17 7 12 55 31 -49 -19 13 24 -17 44 2 -19 37 40 -17 20 2 149 0 0 -17 47 42 17 7 41 56 29 -48 -18 32 29 -17 3 5 -18 56 46 -16 39 5 150 0 0 -17 6 37 17 8 11 57 28 -46 -17 51 25 -16 22 1 -18 15 42 -15 58 0 151 0 0 -16 25 26 17 8 42 58 27 -45 -17 10 14 -15 40 50 -17 34 31 -15 16 49 152 0 0 -15 44 11 17 9 13 59 25 -44 -16 28 58 -14 59 35 -16 53 14 -14 35 35 153 0 0 -15 2 52 17 9 44 60 24 -43 -15 47 38 -14 18 18 -16 11 54 -13 54 18 154 0 0 -14 21 33 17 10 16 61 22 -42 -15 6 17 -13 37 1 -15 30 32 -13 13 2 155 0 0 -13 40 15 17 10 49 62 20 -41 -14 24 57 -12 55 45 -14 49 10 -12 31 48 156 0 0 -12 59 1 17 11 21 63 19 -39 -13 43 40 -12 14 34 -14 7 52 -11 50 38 157 0 0 -12 17 52 17 11 54 64 17 -38 -13 2 27 -11 33 28 -13 26 37 -11 9 35 158 0 0 -11 36 50 17 12 28 65 14 -37 -12 21 22 -10 52 31 -12 45 29 -10 28 39 159 0 0 -10 55 58 17 13 2 66 12 -36 -11 40 25 -10 11 43 -12 4 30 - 9 47 54 160 0 0 -10 15 17 17 13 36 67 10 -34 -10 59 39 - 9 31 7 -11 23 42 - 9 7 21 161 0 0 - 9 34 50 17 14 10 68 7 -33 -10 19 7 - 8 50 46 -10 43 6 - 8 27 3 162 0 0 - 8 54 38 17 14 44 69 4 -32 - 9 38 49 - 8 10 40 -10 2 45 - 7 47 0 163 0 0 - 8 14 44 17 15 19 70 1 -31 - 8 58 48 - 7 30 52 - 9 22 41 - 7 7 15 164 0 0 - 7 35 8 17 15 54 70 358 -29 - 8 19 6 - 6 51 23 - 8 42 55 - 6 27 51 165 0 0 - 6 55 54 17 16 29 71 354 -28 - 7 39 44 - 6 12 16 - 8 3 29 - 5 48 47 166 0 0 - 6 17 2 17 17 4 71 351 -27 - 7 0 45 - 5 33 32 - 7 24 26 - 5 10 8 167 0 0 - 5 38 35 17 17 39 72 347 -26 - 6 22 9 - 4 55 13 - 6 45 46 - 4 31 53 168 0 0 - 5 0 34 17 18 14 72 343 -24 - 5 44 0 - 4 17 21 - 6 7 32 - 3 54 5 169 0 0 - 4 23 1 17 18 49 72 339 -23 - 5 6 18 - 3 39 56 - 5 29 45 - 3 16 45 170 0 0 - 3 45 57 17 19 24 72 335 -22 - 4 29 5 - 3 3 0 - 4 52 27 - 2 39 54 171 0 0 - 3 9 23 17 19 59 72 331 -20 - 3 52 22 - 2 26 36 - 4 15 39 - 2 3 35 172 0 0 - 2 33 21 17 20 34 72 327 -19 - 3 16 10 - 1 50 44 - 3 39 23 - 1 27 47 173 0 0 - 1 57 52 17 21 8 72 323 -18 - 2 40 32 - 1 15 24 - 3 3 39 - 0 52 33 174 0 0 - 1 22 58 17 21 43 72 319 -17 - 2 5 27 - 0 40 40 - 2 28 29 - 0 17 54 175 0 0 - 0 48 39 17 22 17 71 315 -15 - 1 30 58 - 0 6 31 - 1 53 55 0 16 10 176 0 0 - 0 14 56 17 22 51 71 311 -14 - 0 57 6 0 27 2 - 1 19 56 0 49 37 177 0 0 0 18 9 17 23 25 70 308 -13 - 0 23 50 0 59 57 - 0 46 35 1 22 27 178 0 0 0 50 36 17 23 58 70 305 -12 0 8 47 1 32 14 - 0 13 52 1 54 38 179 0 0 1 22 25 17 24 32 69 302 -10 0 40 46 2 3 52 0 18 12 2 26 10 180 0 0 1 53 33 17 25 5 68 300 -9 1 12 5 2 34 50 0 49 36 2 57 3 -179 0 0 2 24 1 17 25 37 68 297 -8 1 42 44 3 5 8 1 20 21 3 27 16 -178 0 0 2 53 49 17 26 9 67 295 -7 2 12 41 3 34 45 1 50 24 3 56 47 -177 0 0 3 22 55 17 26 41 66 293 -6 2 41 58 4 3 41 2 19 46 4 25 37 -176 0 0 3 51 19 17 27 13 65 291 -4 3 10 32 4 31 55 2 48 26 4 53 46 -175 0 0 4 19 1 17 27 44 64 290 -3 3 38 24 4 59 27 3 16 24 5 21 13 -174 0 0 4 46 1 17 28 15 63 288 -2 4 5 34 5 26 17 3 43 39 5 47 57 -173 0 0 5 12 18 17 28 45 62 287 -1 4 32 1 5 52 24 4 10 11 6 13 59 Uncertainty in time = +/- 10 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: UCAC2 36048195 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 13 46.7538 DE: +12 11 44.920 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .022 ) * V mag [mag]: 11.7 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (419) Aurelia approx. diameter [km]: 129 approx. diameter ["]: .100 distance from Earth [AU]: 1.77800 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1033 number of rejected observations: 131 time covered by the observations: 1900 Jul 21 - 2008 Mar 03 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.014, 73° remarks: * orbital elements for (419) Aurelia : Mean anomaly = 56.47688787 deg Arg. of pericenter = 44.62435635 deg Long. of node = 229.30239366 deg Inclination = 3.92473372 deg Eccentricity = 0.25316024 Semimajor axis = 2.59552326 AU Perihelion dist = 1.93843997 AU Mag: H = 8.46, G = 0.15 Epoch of elements : MJD 55050.72200000 TDT (2009 Aug 07.722) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Aug 7 419 Aurelia 17h 19.8m UT 11.7 1 13 46.754 12 11 44.92UCAC2 36048195 0.0 12.6 129 31.2 1.778 0.690 5.49 162.1342 12.194 -78.51 16.24 17.3298 0.14590 -0.26635 2.04808 1.11202 -0.00450 -0.00201 2000 56.3067102009 8 7.00000 44.624356229.302394 3.9247340.25316024 2.5955233 1.9384400 8.4 5.00.15 RATE 2.3570380 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.026 83 1.27 0.027 0 54545.5020090807_048195 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 11:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org