IOTA/IOTA-ES occultation update for (151) Abundantia / TYC 6385-01305-1 event on 2012 Nov 23, 12:41 UT Visible from Japan, Taiwan, SE Asia Summary ------- On 2012 Nov 23 UT, the 42 km diameter asteroid (151) Abundantia will occult a 10.2 mag star in the constellation Aquarius for observers along a path across Japan, Taiwan, SE Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.1 mag to 14.3 mag (the magnitude of the asteroid) for at most 2.5 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: 42 * date and approx. time of event: 2012 Nov 23, 12:41 - 2012 Nov 23, 12:47 UT * geocentric midpoint of event [JD]: 2456255.0289 * magnitude of target star: 10.2 * magnitude drop [mag]: 4.1 * estimated maximum duration [s]: 2.5 * Moon: 78 % sunlit, 35° distance * Sun: 91° distance * rough path description: Japan, Taiwan, SE Asia The occultation path -------------------- * approximate projected width [km]: 43 * 1 sigma uncertainty interval [path widths]: +/- 1.57 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .034", 87° ) * approx speed of asteroid's shadow [km/s]: 16.8391 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6385-01305-1 by 151 Abundantia on 2012 Nov 23 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 156 52 35 41 0 0 12 47 49 1 249 -68 157 35 42 156 10 12 ... .. .. 154 1 26 153 34 40 40 0 0 12 47 48 3 247 -68 154 14 1 152 55 51 156 21 28 150 57 15 Latitude Latitude Latitude Latitude 152 0 0 39 29 8 12 47 47 5 246 -68 39 16 36 39 41 39 38 37 21 40 21 3 151 0 0 39 8 49 12 47 47 6 245 -68 38 56 15 39 21 24 38 16 50 40 0 56 150 0 0 38 47 56 12 47 46 6 245 -68 38 35 19 39 0 33 37 55 45 39 40 15 149 0 0 38 26 27 12 47 46 7 244 -67 38 13 47 38 39 7 37 34 4 39 18 58 148 0 0 38 4 23 12 47 45 8 243 -67 37 51 40 38 17 6 37 11 47 38 57 6 147 0 0 37 41 42 12 47 44 9 243 -67 37 28 56 37 54 29 36 48 55 38 34 39 146 0 0 37 18 26 12 47 43 10 242 -67 37 5 37 37 31 16 36 25 26 38 11 35 145 0 0 36 54 33 12 47 42 11 242 -66 36 41 41 37 7 26 36 1 20 37 47 55 144 0 0 36 30 4 12 47 41 12 241 -66 36 17 9 36 43 0 35 36 37 37 23 39 143 0 0 36 4 57 12 47 39 13 240 -65 35 51 59 36 17 56 35 11 18 36 58 46 142 0 0 35 39 14 12 47 38 14 240 -65 35 26 12 35 52 16 34 45 21 36 33 15 141 0 0 35 12 53 12 47 37 14 239 -64 34 59 48 35 25 58 34 18 47 36 7 8 140 0 0 34 45 54 12 47 35 15 239 -64 34 32 46 34 59 3 33 51 35 35 40 23 139 0 0 34 18 18 12 47 33 16 238 -63 34 5 7 34 31 30 33 23 45 35 13 0 138 0 0 33 50 4 12 47 31 17 237 -63 33 36 49 34 3 19 32 55 17 34 44 59 137 0 0 33 21 11 12 47 29 18 237 -62 33 7 53 33 34 30 32 26 12 34 16 21 136 0 0 32 51 41 12 47 27 19 236 -62 32 38 20 33 5 3 31 56 28 33 47 4 135 0 0 32 21 32 12 47 25 20 236 -61 32 8 8 32 34 57 31 26 6 33 17 9 134 0 0 31 50 46 12 47 23 21 235 -60 31 37 18 32 4 14 30 55 6 32 46 36 133 0 0 31 19 21 12 47 20 22 235 -59 31 5 50 31 32 53 30 23 27 32 15 25 132 0 0 30 47 18 12 47 18 23 234 -59 30 33 44 31 0 53 29 51 11 31 43 35 131 0 0 30 14 37 12 47 15 24 234 -58 30 1 0 30 28 15 29 18 17 31 11 8 130 0 0 29 41 19 12 47 12 25 233 -57 29 27 38 29 55 0 28 44 46 30 38 2 129 0 0 29 7 23 12 47 9 26 232 -56 28 53 39 29 21 7 28 10 37 30 4 19 128 0 0 28 32 49 12 47 6 27 232 -56 28 19 3 28 46 37 27 35 50 29 29 59 127 0 0 27 57 39 12 47 2 28 231 -55 27 43 49 28 11 30 27 0 27 28 55 1 126 0 0 27 21 52 12 46 59 30 231 -54 27 7 59 27 35 46 26 24 28 28 19 27 125 0 0 26 45 29 12 46 55 31 230 -53 26 31 33 26 59 26 25 47 53 27 43 16 124 0 0 26 8 30 12 46 51 32 230 -52 25 54 32 26 22 30 25 10 42 27 6 29 123 0 0 25 30 57 12 46 47 33 229 -51 25 16 55 25 44 59 24 32 57 26 29 7 122 0 0 24 52 48 12 46 43 34 229 -50 24 38 44 25 6 53 23 54 37 25 51 10 121 0 0 24 14 6 12 46 39 35 228 -49 24 0 0 24 28 14 23 15 45 25 12 39 120 0 0 23 34 52 12 46 35 36 228 -48 23 20 42 23 49 2 22 36 19 24 33 35 119 0 0 22 55 5 12 46 30 37 227 -47 22 40 53 23 9 17 21 56 22 23 53 58 118 0 0 22 14 46 12 46 25 38 227 -46 22 0 32 22 29 1 21 15 54 23 13 50 117 0 0 21 33 58 12 46 20 40 226 -45 21 19 42 21 48 15 20 34 56 22 33 11 116 0 0 20 52 40 12 46 15 41 226 -44 20 38 22 21 7 0 19 53 30 21 52 2 115 0 0 20 10 55 12 46 10 42 225 -43 19 56 34 20 25 16 19 11 36 21 10 25 114 0 0 19 28 43 12 46 5 43 225 -42 19 14 20 19 43 6 18 29 16 20 28 20 113 0 0 18 46 5 12 45 59 44 224 -41 18 31 41 19 0 30 17 46 31 19 45 50 112 0 0 18 3 3 12 45 53 46 224 -40 17 48 37 18 17 29 17 3 23 19 2 55 111 0 0 17 19 38 12 45 48 47 223 -39 17 5 11 17 34 6 16 19 52 18 19 36 110 0 0 16 35 52 12 45 42 48 223 -38 16 21 24 16 50 21 15 36 1 17 35 55 109 0 0 15 51 47 12 45 35 49 222 -37 15 37 17 16 6 17 14 51 51 16 51 55 108 0 0 15 7 23 12 45 29 50 222 -35 14 52 52 15 21 54 14 7 23 16 7 35 107 0 0 14 22 43 12 45 23 52 221 -34 14 8 11 14 37 15 13 22 40 15 22 59 106 0 0 13 37 48 12 45 16 53 220 -33 13 23 16 13 52 21 12 37 42 14 38 7 105 0 0 12 52 41 12 45 9 54 220 -32 12 38 8 13 7 14 11 52 32 13 53 1 104 0 0 12 7 22 12 45 2 55 219 -31 11 52 49 12 21 56 11 7 12 13 7 44 103 0 0 11 21 54 12 44 55 56 218 -30 11 7 21 11 36 28 10 21 44 12 22 17 102 0 0 10 36 19 12 44 48 58 218 -28 10 21 46 10 50 52 9 36 9 11 36 41 101 0 0 9 50 38 12 44 41 59 217 -27 9 36 5 10 5 12 8 50 29 10 51 0 100 0 0 9 4 54 12 44 34 60 216 -26 8 50 21 9 19 27 8 4 46 10 5 14 99 0 0 8 19 8 12 44 26 61 215 -25 8 4 36 8 33 41 7 19 2 9 19 26 98 0 0 7 33 22 12 44 19 62 214 -24 7 18 51 7 47 54 6 33 20 8 33 38 97 0 0 6 47 39 12 44 11 64 213 -22 6 33 9 7 2 10 5 47 40 7 47 51 96 0 0 6 2 0 12 44 4 65 212 -21 5 47 31 6 16 31 5 2 5 7 2 8 95 0 0 5 16 28 12 43 56 66 211 -20 5 1 59 5 30 57 4 16 38 6 16 30 94 0 0 4 31 3 12 43 48 67 210 -19 4 16 36 4 45 31 3 31 19 5 31 0 93 0 0 3 45 49 12 43 40 68 209 -17 3 31 23 4 0 15 2 46 11 4 45 40 92 0 0 3 0 46 12 43 32 70 207 -16 2 46 23 3 15 11 2 1 15 4 0 30 91 0 0 2 15 58 12 43 24 71 205 -15 2 1 36 2 30 20 1 16 34 3 15 34 90 0 0 1 31 24 12 43 16 72 203 -14 1 17 4 1 45 45 0 32 9 2 30 53 89 0 0 0 47 9 12 43 8 73 201 -13 0 32 51 1 1 27 - 0 11 58 1 46 28 88 0 0 0 3 12 12 43 0 74 199 -11 - 0 11 4 0 17 28 - 0 55 46 1 2 22 87 0 0 - 0 40 25 12 42 52 75 196 -10 - 0 54 38 - 0 26 10 - 1 39 13 0 18 36 86 0 0 - 1 23 38 12 42 44 76 193 -9 - 1 37 49 - 1 9 27 - 2 22 17 - 0 24 48 85 0 0 - 2 6 29 12 42 35 77 190 -8 - 2 20 37 - 1 52 20 - 3 4 56 - 1 7 49 84 0 0 - 2 48 54 12 42 27 78 186 -6 - 3 2 59 - 2 34 47 - 3 47 10 - 1 50 25 83 0 0 - 3 30 52 12 42 19 78 181 -5 - 3 44 55 - 3 16 48 - 4 28 57 - 2 32 35 82 0 0 - 4 12 22 12 42 11 79 176 -4 - 4 26 22 - 3 58 21 - 5 10 15 - 3 14 17 81 0 0 - 4 53 23 12 42 3 79 170 -3 - 5 7 20 - 4 39 25 - 5 51 4 - 3 55 30 80 0 0 - 5 33 54 12 41 55 80 164 -2 - 5 47 48 - 5 19 59 - 6 31 22 - 4 36 13 79 0 0 - 6 13 53 12 41 47 80 157 0 - 6 27 44 - 6 0 1 - 7 11 8 - 5 16 25 Uncertainty in time = +/- 4 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 6385-01305-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 24 23.9833 DE: -15 15 45.053 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .039, .033 ) * V mag [mag]: 10.2 * B mag [mag]: 10.7 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (151) Abundantia approx. diameter [km]: 42 approx. diameter ["]: .023 distance from Earth [AU]: 2.47900 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1046 number of rejected observations: 76 time covered by the observations: 1902 Mar 13 - 2012 Nov 05 1 sigma uncertainty ellipse (major, minor, PA): 0.015, 0.009, 66° remarks: * orbital elements for (151) Abundantia : Mean anomaly = 182.77584460 deg Arg. of pericenter = 132.22509814 deg Long. of node = 38.96664939 deg Inclination = 6.43874620 deg Eccentricity = 0.03508381 Semimajor axis = 2.59102459 AU Perihelion dist = 2.50012159 AU Mag: H = 9.06, G = 0.15 Epoch of elements : MJD 56254.52900000 TDT (2012 Nov 23.529) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 23 151 Abundantia 12h 41.6m UT 10.2 22 24 23.983-15 15 45.05TYC 6385-01305-1 10.7 14.3 42 2.5 2.479 1.950 18.47 82.8043 -15.268 -13.76 -20.49 12.6936 -0.08956 0.14200 7.95185 5.20603 0.00545 0.00214 2000 181.70556120121119.00000132.225098 38.966649 6.4387460.03508381 2.5910246 2.5001216 9.1 5.00.15 RATE 2.3631800 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.034 87 2.57 0.037 0 0 3-3 056247.0020121123_1305-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 08:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org