IOTA/IOTA-ES occultation update for (159) Aemilia / TYC 4979-01058-1 event on 2009 May 02, 03:36 UT Visible from Summary ------- On 2009 May 02 UT, the 125 km diameter asteroid (159) Aemilia will occult a 11.2 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.8 mag to 12.7 mag (the magnitude of the asteroid) for at most 9.8 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: 96 * date and approx. time of event: 2009 May 02, 03:29 - 2009 May 02, 03:43 UT * magnitude of target star: 11.2 * magnitude drop [mag]: 1.8 * estimated maximum duration [s]: 9.8 * Moon: 53 % sunlit, 79° distance * Sun: 168° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 153 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 4.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .032", 3° ) * approx speed of asteroid's shadow [km/s]: 12.8013 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4979-01058-1 by 159 Aemilia on 2009 May 2 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 -126 0 0 51 3 52 3 43 1 12 113 0 51 46 55 50 21 13 52 22 31 49 46 30 -125 0 0 50 54 15 3 42 59 13 114 -1 51 37 22 50 11 32 52 13 1 49 36 47 -124 0 0 50 44 23 3 42 58 13 114 -2 51 27 34 50 1 37 52 3 16 49 26 49 -123 0 0 50 34 17 3 42 56 14 115 -2 51 17 31 49 51 26 51 53 17 49 16 35 -122 0 0 50 23 55 3 42 54 14 116 -3 51 7 13 49 41 1 51 43 2 49 6 7 -121 0 0 50 13 19 3 42 52 15 117 -4 50 56 41 49 30 21 51 32 33 48 55 24 -120 0 0 50 2 28 3 42 51 16 117 -4 50 45 54 49 19 27 51 21 49 48 44 27 -119 0 0 49 51 23 3 42 49 16 118 -5 50 34 52 49 8 17 51 10 51 48 33 14 -118 0 0 49 40 2 3 42 47 17 119 -6 50 23 36 48 56 53 50 59 37 48 21 47 -117 0 0 49 28 27 3 42 44 18 120 -6 50 12 4 48 45 14 50 48 10 48 10 5 -116 0 0 49 16 38 3 42 42 18 121 -7 50 0 19 48 33 21 50 36 27 47 58 9 -115 0 0 49 4 33 3 42 40 19 121 -7 49 48 18 48 21 13 50 24 30 47 45 58 -114 0 0 48 52 15 3 42 37 20 122 -8 49 36 3 48 8 50 50 12 18 47 33 33 -113 0 0 48 39 42 3 42 35 20 123 -9 49 23 34 47 56 14 49 59 52 47 20 53 -112 0 0 48 26 54 3 42 32 21 124 -9 49 10 50 47 43 22 49 47 11 47 7 59 -111 0 0 48 13 52 3 42 30 22 125 -10 48 57 52 47 30 17 49 34 16 46 54 50 -110 0 0 48 0 36 3 42 27 22 126 -11 48 44 40 47 16 57 49 21 7 46 41 28 -109 0 0 47 47 6 3 42 24 23 126 -11 48 31 13 47 3 24 49 7 44 46 27 51 -108 0 0 47 33 22 3 42 21 24 127 -12 48 17 33 46 49 36 48 54 6 46 14 1 -107 0 0 47 19 24 3 42 18 24 128 -13 48 3 38 46 35 34 48 40 15 45 59 57 -106 0 0 47 5 12 3 42 15 25 129 -13 47 49 30 46 21 19 48 26 9 45 45 39 -105 0 0 46 50 46 3 42 12 26 130 -14 47 35 8 46 6 50 48 11 50 45 31 7 -104 0 0 46 36 7 3 42 8 26 130 -15 47 20 32 45 52 8 47 57 17 45 16 22 -103 0 0 46 21 15 3 42 5 27 131 -15 47 5 43 45 37 12 47 42 31 45 1 24 -102 0 0 46 6 9 3 42 1 28 132 -16 46 50 40 45 22 3 47 27 31 44 46 12 -101 0 0 45 50 50 3 41 57 28 133 -17 46 35 25 45 6 41 47 12 18 44 30 48 -100 0 0 45 35 18 3 41 54 29 134 -17 46 19 56 44 51 6 46 56 52 44 15 11 - 99 0 0 45 19 34 3 41 50 30 135 -18 46 4 14 44 35 19 46 41 13 43 59 21 - 98 0 0 45 3 36 3 41 46 30 136 -19 45 48 20 44 19 19 46 25 21 43 43 19 - 97 0 0 44 47 27 3 41 42 31 137 -19 45 32 13 44 3 7 46 9 17 43 27 4 - 96 0 0 44 31 5 3 41 38 32 137 -20 45 15 54 43 46 42 45 53 0 43 10 38 - 95 0 0 44 14 31 3 41 33 32 138 -21 44 59 23 43 30 6 45 36 31 42 54 0 - 94 0 0 43 57 46 3 41 29 33 139 -21 44 42 40 43 13 18 45 19 50 42 37 10 - 93 0 0 43 40 49 3 41 24 34 140 -22 44 25 46 42 56 19 45 2 58 42 20 9 - 92 0 0 43 23 41 3 41 20 35 141 -23 44 8 40 42 39 9 44 45 54 42 2 57 - 91 0 0 43 6 22 3 41 15 35 142 -23 43 51 23 42 21 48 44 28 38 41 45 34 - 90 0 0 42 48 52 3 41 10 36 143 -24 43 33 55 42 4 16 44 11 12 41 28 0 - 89 0 0 42 31 11 3 41 5 37 144 -25 43 16 16 41 46 33 43 53 35 41 10 17 - 88 0 0 42 13 21 3 41 0 37 145 -25 42 58 27 41 28 41 43 35 48 40 52 23 - 87 0 0 41 55 20 3 40 55 38 146 -26 42 40 28 41 10 39 43 17 50 40 34 20 - 86 0 0 41 37 10 3 40 50 38 147 -27 42 22 20 40 52 27 42 59 43 40 16 7 - 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55 0 0 31 28 28 3 37 25 54 188 -43 32 13 15 30 44 7 32 50 20 30 8 3 - 54 0 0 31 8 36 3 37 17 54 190 -44 31 53 21 30 24 18 32 30 24 29 48 16 - 53 0 0 30 48 49 3 37 9 54 192 -44 31 33 31 30 4 33 32 10 31 29 28 34 - 52 0 0 30 29 7 3 37 2 54 193 -44 31 13 46 29 44 53 31 50 43 29 8 56 - 51 0 0 30 9 29 3 36 54 54 195 -44 30 54 6 29 25 19 31 31 1 28 49 24 - 50 0 0 29 49 57 3 36 46 55 197 -45 30 34 31 29 5 49 31 11 23 28 29 57 - 49 0 0 29 30 31 3 36 38 55 198 -45 30 15 2 28 46 26 30 51 51 28 10 36 - 48 0 0 29 11 12 3 36 30 55 200 -45 29 55 39 28 27 10 30 32 26 27 51 22 - 47 0 0 28 51 59 3 36 23 55 202 -45 29 36 23 28 8 1 30 13 8 27 32 15 - 46 0 0 28 32 54 3 36 15 55 204 -45 29 17 15 27 48 58 29 53 56 27 13 16 - 45 0 0 28 13 56 3 36 7 55 205 -45 28 58 14 27 30 4 29 34 53 26 54 24 - 44 0 0 27 55 7 3 35 59 54 207 -46 28 39 21 27 11 18 29 15 57 26 35 41 - 43 0 0 27 36 26 3 35 51 54 209 -46 28 20 37 26 52 41 28 57 11 26 17 6 - 42 0 0 27 17 55 3 35 43 54 211 -46 28 2 2 26 34 13 28 38 33 25 58 40 - 41 0 0 26 59 33 3 35 35 54 212 -46 27 43 37 26 15 54 28 20 4 25 40 25 - 40 0 0 26 41 21 3 35 27 54 214 -46 27 25 21 25 57 45 28 1 46 25 22 19 - 39 0 0 26 23 19 3 35 19 53 215 -46 27 7 16 25 39 47 27 43 38 25 4 23 - 38 0 0 26 5 28 3 35 12 53 217 -46 26 49 21 25 22 0 27 25 40 24 46 38 - 37 0 0 25 47 48 3 35 4 53 219 -46 26 31 38 25 4 23 27 7 53 24 29 5 - 36 0 0 25 30 20 3 34 56 53 220 -45 26 14 6 24 46 58 26 50 18 24 11 42 - 35 0 0 25 13 3 3 34 48 52 222 -45 25 56 46 24 29 45 26 32 55 23 54 32 - 34 0 0 24 55 59 3 34 40 52 223 -45 25 39 38 24 12 45 26 15 45 23 37 35 - 33 0 0 24 39 8 3 34 33 51 225 -45 25 22 43 23 55 57 25 58 46 23 20 49 - 32 0 0 24 22 29 3 34 25 51 226 -45 25 6 1 23 39 22 25 42 1 23 4 17 - 31 0 0 24 6 4 3 34 17 51 227 -44 24 49 32 23 23 0 25 25 30 22 47 58 - 30 0 0 23 49 53 3 34 10 50 229 -44 24 33 17 23 6 52 25 9 12 22 31 53 - 29 0 0 23 33 56 3 34 2 50 230 -44 24 17 17 22 50 59 24 53 8 22 16 3 - 28 0 0 23 18 13 3 33 55 49 231 -44 24 1 30 22 35 19 24 37 19 22 0 26 - 27 0 0 23 2 45 3 33 47 49 233 -43 23 45 59 22 19 55 24 21 44 21 45 4 - 26 0 0 22 47 32 3 33 40 48 234 -43 23 30 43 22 4 46 24 6 25 21 29 58 - 25 0 0 22 32 35 3 33 33 47 235 -43 23 15 42 21 49 51 23 51 21 21 15 6 - 24 0 0 22 17 53 3 33 25 47 236 -42 23 0 56 21 35 13 23 36 33 21 0 31 - 23 0 0 22 3 28 3 33 18 46 237 -42 22 46 27 21 20 51 23 22 1 20 46 11 - 22 0 0 21 49 18 3 33 11 46 238 -41 22 32 15 21 6 45 23 7 45 20 32 8 - 21 0 0 21 35 26 3 33 4 45 239 -41 22 18 19 20 52 55 22 53 47 20 18 21 - 20 0 0 21 21 50 3 32 57 44 240 -40 22 4 40 20 39 23 22 40 5 20 4 51 - 19 0 0 21 8 31 3 32 50 44 241 -40 21 51 18 20 26 8 22 26 40 19 51 38 - 18 0 0 20 55 30 3 32 43 43 242 -39 21 38 14 20 13 10 22 13 34 19 38 43 - 17 0 0 20 42 47 3 32 37 42 243 -39 21 25 27 20 0 29 22 0 45 19 26 5 - 16 0 0 20 30 22 3 32 30 41 244 -38 21 12 59 19 48 7 21 48 14 19 13 45 - 15 0 0 20 18 15 3 32 24 41 245 -38 21 0 49 19 36 3 21 36 1 19 1 43 - 14 0 0 20 6 26 3 32 17 40 246 -37 20 48 58 19 24 17 21 24 7 18 50 0 - 13 0 0 19 54 56 3 32 11 39 246 -37 20 37 25 19 12 50 21 12 32 18 38 35 - 12 0 0 19 43 46 3 32 5 38 247 -36 20 26 11 19 1 42 21 1 16 18 27 29 - 11 0 0 19 32 54 3 31 58 38 248 -35 20 15 17 18 50 53 20 50 19 18 16 42 - 10 0 0 19 22 22 3 31 52 37 249 -35 20 4 42 18 40 24 20 39 42 18 6 15 - 9 0 0 19 12 9 3 31 46 36 249 -34 19 54 27 18 30 13 20 29 25 17 56 6 - 8 0 0 19 2 16 3 31 41 35 250 -33 19 44 32 18 20 23 20 19 28 17 46 18 - 7 0 0 18 52 44 3 31 35 34 251 -33 19 34 56 18 10 53 20 9 50 17 36 50 - 6 0 0 18 43 31 3 31 29 34 251 -32 19 25 42 18 1 42 20 0 34 17 27 41 - 5 0 0 18 34 39 3 31 24 33 252 -31 19 16 47 17 52 53 19 51 37 17 18 53 - 4 0 0 18 26 7 3 31 19 32 252 -31 19 8 14 17 44 23 19 43 2 17 10 25 - 3 0 0 18 17 57 3 31 13 31 253 -30 19 0 1 17 36 14 19 34 47 17 2 18 - 2 0 0 18 10 7 3 31 8 30 253 -29 18 52 9 17 28 26 19 26 54 16 54 32 - 1 0 0 18 2 38 3 31 3 29 254 -28 18 44 38 17 21 0 19 19 22 16 47 6 0 0 0 17 55 31 3 30 58 28 254 -28 18 37 29 17 13 54 19 12 11 16 40 2 1 0 0 17 48 45 3 30 54 28 255 -27 18 30 41 17 7 9 19 5 22 16 33 19 2 0 0 17 42 20 3 30 49 27 255 -26 18 24 15 17 0 46 18 58 55 16 26 57 3 0 0 17 36 17 3 30 45 26 256 -25 18 18 11 16 54 45 18 52 49 16 20 57 4 0 0 17 30 36 3 30 40 25 256 -25 18 12 29 16 49 5 18 47 6 16 15 18 5 0 0 17 25 17 3 30 36 24 257 -24 18 7 9 16 43 48 18 41 44 16 10 1 6 0 0 17 20 21 3 30 32 23 257 -23 18 2 11 16 38 52 18 36 45 16 5 7 7 0 0 17 15 46 3 30 28 22 258 -22 17 57 35 16 34 18 18 32 9 16 0 34 8 0 0 17 11 33 3 30 25 21 258 -21 17 53 22 16 30 7 18 27 55 15 56 23 9 0 0 17 7 44 3 30 21 20 258 -21 17 49 31 16 26 18 18 24 3 15 52 34 10 0 0 17 4 16 3 30 18 20 259 -20 17 46 3 16 22 51 18 20 34 15 49 8 11 0 0 17 1 11 3 30 14 19 259 -19 17 42 57 16 19 47 18 17 29 15 46 5 12 0 0 16 58 29 3 30 11 18 259 -18 17 40 15 16 17 5 18 14 46 15 43 23 13 0 0 16 56 10 3 30 8 17 260 -17 17 37 55 16 14 46 18 12 26 15 41 5 14 0 0 16 54 14 3 30 5 16 260 -16 17 35 58 16 12 50 18 10 29 15 39 9 15 0 0 16 52 40 3 30 3 15 260 -15 17 34 25 16 11 17 18 8 55 15 37 36 16 0 0 16 51 30 3 30 0 14 261 -15 17 33 14 16 10 6 18 7 45 15 36 25 17 0 0 16 50 42 3 29 58 13 261 -14 17 32 27 16 9 19 18 6 57 15 35 38 18 0 0 16 50 18 3 29 56 12 261 -13 17 32 3 16 8 55 18 6 34 15 35 13 19 0 0 16 50 17 3 29 53 11 262 -12 17 32 3 16 8 53 18 6 33 15 35 12 20 0 0 16 50 40 3 29 52 10 262 -11 17 32 25 16 9 15 18 6 56 15 35 33 21 0 0 16 51 25 3 29 50 9 262 -10 17 33 11 16 10 0 18 7 43 15 36 18 22 0 0 16 52 34 3 29 48 8 263 -9 17 34 21 16 11 8 18 8 53 15 37 26 23 0 0 16 54 6 3 29 47 7 263 -8 17 35 54 16 12 40 18 10 27 15 38 56 24 0 0 16 56 2 3 29 46 6 263 -7 17 37 51 16 14 35 18 12 24 15 40 50 25 0 0 16 58 21 3 29 45 6 264 -6 17 40 11 16 16 53 18 14 45 15 43 8 26 0 0 17 1 4 3 29 44 5 264 -6 17 42 54 16 19 34 18 17 30 15 45 48 27 0 0 17 4 9 3 29 43 4 264 -5 17 46 2 16 22 39 18 20 38 15 48 52 28 0 0 17 7 39 3 29 42 3 264 -4 17 49 32 16 26 7 18 24 10 15 52 19 29 0 0 17 11 31 3 29 42 2 265 -3 17 53 26 16 29 58 18 28 6 15 56 9 30 0 0 17 15 48 3 29 42 1 265 -2 17 57 44 16 34 13 18 32 25 16 0 22 Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 4979-01058-1 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 14 18 35.0713 DE: -04 27 34.524 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .030 ) * V mag [mag]: 11.2 * B mag [mag]: 12.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (159) Aemilia approx. diameter [km]: 125 approx. diameter ["]: .079 distance from Earth [AU]: 2.17100 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 915 number of rejected observations: 117 time covered by the observations: 1904 Jan 11 - 2008 Mar 12 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.013, 108° remarks: * orbital elements for (159) Aemilia : Mean anomaly = 94.60329785 deg Arg. of pericenter = 335.12109027 deg Long. of node = 134.32067814 deg Inclination = 6.12841837 deg Eccentricity = 0.11065887 Semimajor axis = 3.09956240 AU Perihelion dist = 2.75656834 AU Mag: H = 8.20, G = 0.15 Epoch of elements : MJD 54953.15100000 TDT (2009 May 02.151) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 May 2 159 Aemilia 3h 36.5m UT 11.2 14 18 35.071- 4 27 34.52TYC 4979-01058-1 12.3 12.7 125 9.8 2.171 -1.861 9.05 -59.6633 -4.461 125.14 15.40 3.6079 0.17857 0.54931 -6.87081 2.23582 0.00048 -0.00110 2000 94.0341812009 429.00000335.121090134.320678 6.1284180.11065887 3.0995624 2.7565683 8.1 5.00.15 RATE 1.8061480 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.032 3 1.41 0.033 0 54545.5020090502_1058-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 07:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org