IOTA/IOTA-ES occultation update for (433) Eros / TYC 0546-01851-1 event on 2009 Oct 27, 04:18 UT Visible from USA Summary ------- On 2009 Oct 27 UT, the 24 km diameter asteroid (433) Eros will occult a 9.6 mag star in the constellation Pegasus 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 3.3 mag to 12.8 mag (the magnitude of the asteroid) for at most 6.3 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: 85 * date and approx. time of event: 2009 Oct 27, 04:07 - 2009 Oct 27, 04:41 UT * magnitude of target star: 9.6 * magnitude drop [mag]: 3.3 * estimated maximum duration [s]: 6.3 * Moon: 61 % sunlit, 18° distance * Sun: 112° distance * rough path description: USA The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 0.60 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .022 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .023", .022", 180° ) * approx speed of asteroid's shadow [km/s]: 3.8362 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0546-01851-1 by 433 Eros on 2009 Oct 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 -169 0 0 46 6 0 4 7 18 37 133 0 45 57 34 46 14 28 45 47 28 46 24 38 -168 0 0 46 3 8 4 7 35 38 134 -1 45 54 42 46 11 36 45 44 36 46 21 46 -167 0 0 46 0 9 4 7 53 39 135 -2 45 51 42 46 8 36 45 41 36 46 18 47 -166 0 0 45 57 2 4 8 11 39 137 -2 45 48 36 46 5 30 45 38 29 46 15 40 -165 0 0 45 53 48 4 8 29 40 138 -3 45 45 22 46 2 16 45 35 15 46 12 27 -164 0 0 45 50 27 4 8 47 40 139 -4 45 42 0 45 58 55 45 31 54 46 9 6 -163 0 0 45 46 59 4 9 5 41 140 -5 45 38 32 45 55 27 45 28 25 46 5 38 -162 0 0 45 43 23 4 9 24 41 142 -5 45 34 57 45 51 51 45 24 50 46 2 2 -161 0 0 45 39 41 4 9 43 42 143 -6 45 31 14 45 48 9 45 21 7 45 58 20 -160 0 0 45 35 51 4 10 2 42 144 -7 45 27 24 45 44 20 45 17 17 45 54 31 -159 0 0 45 31 55 4 10 22 43 145 -7 45 23 27 45 40 23 45 13 20 45 50 34 -158 0 0 45 27 51 4 10 42 43 147 -8 45 19 23 45 36 19 45 9 16 45 46 31 -157 0 0 45 23 40 4 11 1 44 148 -9 45 15 13 45 32 9 45 5 5 45 42 21 -156 0 0 45 19 23 4 11 22 44 149 -10 45 10 55 45 27 52 45 0 47 45 38 4 -155 0 0 45 14 58 4 11 42 45 151 -10 45 6 31 45 23 27 44 56 22 45 33 40 -154 0 0 45 10 27 4 12 2 45 152 -11 45 1 59 45 18 56 44 51 51 45 29 9 -153 0 0 45 5 49 4 12 23 45 154 -12 44 57 21 45 14 19 44 47 13 45 24 31 -152 0 0 45 1 5 4 12 44 46 155 -13 44 52 37 45 9 34 44 42 28 45 19 47 -151 0 0 44 56 14 4 13 5 46 157 -13 44 47 45 45 4 43 44 37 36 45 14 56 -150 0 0 44 51 16 4 13 26 47 158 -14 44 42 47 44 59 46 44 32 38 45 9 59 -149 0 0 44 46 12 4 13 48 47 160 -15 44 37 43 44 54 42 44 27 34 45 4 55 -148 0 0 44 41 2 4 14 10 47 161 -16 44 32 32 44 49 32 44 22 23 44 59 45 -147 0 0 44 35 45 4 14 31 48 163 -16 44 27 16 44 44 15 44 17 6 44 54 29 -146 0 0 44 30 22 4 14 53 48 164 -17 44 21 52 44 38 52 44 11 42 44 49 6 -145 0 0 44 24 53 4 15 15 48 166 -18 44 16 23 44 33 24 44 6 13 44 43 38 -144 0 0 44 19 18 4 15 38 49 167 -19 44 10 48 44 27 49 44 0 37 44 38 3 -143 0 0 44 13 37 4 16 0 49 169 -20 44 5 6 44 22 8 43 54 56 44 32 22 -142 0 0 44 7 50 4 16 23 49 171 -20 43 59 19 44 16 21 43 49 8 44 26 36 -141 0 0 44 1 57 4 16 45 49 172 -21 43 53 27 44 10 29 43 43 15 44 20 44 -140 0 0 43 55 59 4 17 8 49 174 -22 43 47 28 44 4 30 43 37 17 44 14 46 -139 0 0 43 49 55 4 17 31 50 176 -23 43 41 24 43 58 27 43 31 12 44 8 42 -138 0 0 43 43 46 4 17 54 50 177 -24 43 35 15 43 52 18 43 25 3 44 2 34 -137 0 0 43 37 31 4 18 17 50 179 -24 43 29 0 43 46 3 43 18 48 43 56 20 -136 0 0 43 31 11 4 18 40 50 181 -25 43 22 40 43 39 44 43 12 28 43 50 0 -135 0 0 43 24 47 4 19 4 50 182 -26 43 16 15 43 33 19 43 6 2 43 43 36 -134 0 0 43 18 17 4 19 27 50 184 -27 43 9 45 43 26 50 42 59 32 43 37 7 -133 0 0 43 11 42 4 19 51 50 186 -28 43 3 10 43 20 15 42 52 57 43 30 33 -132 0 0 43 5 3 4 20 14 50 188 -28 42 56 31 43 13 36 42 46 18 43 23 54 -131 0 0 42 58 19 4 20 38 50 189 -29 42 49 47 43 6 53 42 39 33 43 17 11 -130 0 0 42 51 31 4 21 1 50 191 -30 42 42 59 43 0 5 42 32 45 43 10 23 -129 0 0 42 44 39 4 21 25 50 193 -31 42 36 6 42 53 13 42 25 52 43 3 31 -128 0 0 42 37 42 4 21 49 50 195 -32 42 29 9 42 46 16 42 18 55 42 56 35 -127 0 0 42 30 42 4 22 12 50 196 -32 42 22 9 42 39 16 42 11 54 42 49 35 -126 0 0 42 23 38 4 22 36 50 198 -33 42 15 4 42 32 12 42 4 50 42 42 31 -125 0 0 42 16 30 4 23 0 50 200 -34 42 7 56 42 25 5 41 57 41 42 35 24 -124 0 0 42 9 19 4 23 23 49 201 -35 42 0 45 42 17 53 41 50 30 42 28 13 -123 0 0 42 2 4 4 23 47 49 203 -36 41 53 30 42 10 39 41 43 15 42 20 58 -122 0 0 41 54 46 4 24 11 49 205 -37 41 46 12 42 3 21 41 35 56 42 13 41 -121 0 0 41 47 25 4 24 34 49 206 -37 41 38 51 41 56 0 41 28 35 42 6 20 -120 0 0 41 40 2 4 24 58 49 208 -38 41 31 27 41 48 37 41 21 11 41 58 57 -119 0 0 41 32 35 4 25 21 48 210 -39 41 24 1 41 41 11 41 13 45 41 51 31 -118 0 0 41 25 6 4 25 45 48 211 -40 41 16 32 41 33 42 41 6 15 41 44 3 -117 0 0 41 17 35 4 26 8 48 213 -41 41 9 1 41 26 11 40 58 44 41 36 32 -116 0 0 41 10 2 4 26 31 47 214 -41 41 1 27 41 18 38 40 51 11 41 28 59 -115 0 0 41 2 27 4 26 54 47 216 -42 40 53 52 41 11 3 40 43 35 41 21 24 -114 0 0 40 54 50 4 27 17 46 217 -43 40 46 15 41 3 27 40 35 58 41 13 48 -113 0 0 40 47 12 4 27 40 46 219 -44 40 38 36 40 55 48 40 28 19 41 6 10 -112 0 0 40 39 32 4 28 3 46 220 -45 40 30 57 40 48 9 40 20 39 40 58 30 -111 0 0 40 31 51 4 28 26 45 222 -45 40 23 16 40 40 28 40 12 58 40 50 49 -110 0 0 40 24 9 4 28 48 45 223 -46 40 15 33 40 32 46 40 5 16 40 43 8 -109 0 0 40 16 26 4 29 11 44 224 -47 40 7 51 40 25 3 39 57 33 40 35 25 -108 0 0 40 8 43 4 29 33 44 226 -48 40 0 7 40 17 20 39 49 49 40 27 42 -107 0 0 40 0 59 4 29 55 43 227 -49 39 52 23 40 9 36 39 42 5 40 19 58 -106 0 0 39 53 15 4 30 17 43 228 -49 39 44 39 40 1 52 39 34 21 40 12 14 -105 0 0 39 45 31 4 30 38 42 230 -50 39 36 55 39 54 8 39 26 37 40 4 30 -104 0 0 39 37 47 4 31 0 42 231 -51 39 29 11 39 46 24 39 18 53 39 56 47 -103 0 0 39 30 4 4 31 21 41 232 -52 39 21 27 39 38 41 39 11 9 39 49 3 -102 0 0 39 22 21 4 31 42 40 233 -53 39 13 44 39 30 58 39 3 26 39 41 20 -101 0 0 39 14 38 4 32 3 40 235 -53 39 6 2 39 23 16 38 55 44 39 33 38 -100 0 0 39 6 57 4 32 23 39 236 -54 38 58 21 39 15 34 38 48 2 39 25 57 - 99 0 0 38 59 17 4 32 43 39 237 -55 38 50 40 39 7 54 38 40 22 39 18 16 - 98 0 0 38 51 38 4 33 3 38 238 -55 38 43 1 39 0 15 38 32 43 39 10 38 - 97 0 0 38 44 0 4 33 23 37 239 -56 38 35 24 38 52 38 38 25 6 39 3 0 - 96 0 0 38 36 25 4 33 42 37 240 -57 38 27 48 38 45 2 38 17 30 38 55 24 - 95 0 0 38 28 51 4 34 1 36 241 -58 38 20 14 38 37 28 38 9 56 38 47 50 - 94 0 0 38 21 19 4 34 20 35 242 -58 38 12 43 38 29 56 38 2 24 38 40 19 - 93 0 0 38 13 49 4 34 39 35 243 -59 38 5 13 38 22 27 37 54 55 38 32 49 - 92 0 0 38 6 22 4 34 57 34 244 -59 37 57 46 38 15 0 37 47 28 38 25 22 - 91 0 0 37 58 58 4 35 15 33 245 -60 37 50 22 38 7 35 37 40 4 38 17 57 - 90 0 0 37 51 36 4 35 32 32 246 -61 37 43 0 38 0 13 37 32 42 38 10 35 - 89 0 0 37 44 17 4 35 49 32 247 -61 37 35 41 37 52 55 37 25 23 38 3 17 - 88 0 0 37 37 2 4 36 6 31 248 -62 37 28 26 37 45 39 37 18 8 37 56 1 - 87 0 0 37 29 49 4 36 23 30 249 -62 37 21 14 37 38 27 37 10 56 37 48 48 - 86 0 0 37 22 41 4 36 39 29 250 -63 37 14 5 37 31 18 37 3 47 37 41 39 - 85 0 0 37 15 36 4 36 54 29 251 -63 37 7 0 37 24 12 36 56 42 37 34 34 - 84 0 0 37 8 34 4 37 10 28 252 -64 36 59 58 37 17 11 36 49 41 37 27 33 - 83 0 0 37 1 37 4 37 25 27 252 -64 36 53 1 37 10 13 36 42 44 37 20 35 - 82 0 0 36 54 44 4 37 39 26 253 -65 36 46 8 37 3 20 36 35 51 37 13 42 - 81 0 0 36 47 55 4 37 53 26 254 -65 36 39 19 36 56 31 36 29 2 37 6 52 - 80 0 0 36 41 10 4 38 7 25 255 -65 36 32 35 36 49 46 36 22 18 37 0 8 - 79 0 0 36 34 30 4 38 21 24 256 -66 36 25 55 36 43 6 36 15 38 36 53 27 - 78 0 0 36 27 55 4 38 33 23 256 -66 36 19 20 36 36 31 36 9 3 36 46 52 - 77 0 0 36 21 24 4 38 46 22 257 -66 36 12 50 36 30 0 36 2 33 36 40 21 - 76 0 0 36 14 59 4 38 58 22 258 -67 36 6 24 36 23 35 35 56 8 36 33 55 - 75 0 0 36 8 39 4 39 10 21 259 -67 36 0 4 36 17 15 35 49 48 36 27 35 - 74 0 0 36 2 24 4 39 21 20 259 -67 35 53 49 36 10 59 35 43 33 36 21 20 - 73 0 0 35 56 14 4 39 32 19 260 -67 35 47 40 36 4 50 35 37 24 36 15 10 - 72 0 0 35 50 10 4 39 42 18 261 -67 35 41 36 35 58 45 35 31 20 36 9 5 - 71 0 0 35 44 12 4 39 52 18 261 -67 35 35 38 35 52 47 35 25 22 36 3 7 - 70 0 0 35 38 19 4 40 1 17 262 -67 35 29 45 35 46 54 35 19 30 35 57 13 - 69 0 0 35 32 32 4 40 10 16 263 -67 35 23 58 35 41 7 35 13 43 35 51 26 - 68 0 0 35 26 51 4 40 19 15 263 -67 35 18 18 35 35 26 35 8 3 35 45 45 - 67 0 0 35 21 16 4 40 27 14 264 -67 35 12 43 35 29 51 35 2 28 35 40 10 - 66 0 0 35 15 48 4 40 35 13 265 -66 35 7 14 35 24 22 34 57 0 35 34 41 - 65 0 0 35 10 25 4 40 42 13 265 -66 35 1 52 35 19 0 34 51 38 35 29 18 - 64 0 0 35 5 9 4 40 49 12 266 -66 34 56 36 35 13 43 34 46 22 35 24 2 - 63 0 0 35 0 0 4 40 55 11 267 -66 34 51 27 35 8 33 34 41 13 35 18 52 - 62 0 0 34 54 57 4 41 1 10 267 -65 34 46 24 35 3 30 34 36 10 35 13 48 - 61 0 0 34 50 0 4 41 6 9 268 -65 34 41 28 34 58 34 34 31 14 35 8 51 - 60 0 0 34 45 10 4 41 11 8 268 -65 34 36 38 34 53 44 34 26 25 35 4 1 - 59 0 0 34 40 27 4 41 15 8 269 -64 34 31 55 34 49 0 34 21 42 34 59 18 - 58 0 0 34 35 51 4 41 19 7 270 -64 34 27 19 34 44 24 34 17 6 34 54 41 - 57 0 0 34 31 22 4 41 23 6 270 -63 34 22 50 34 39 54 34 12 37 34 50 11 - 56 0 0 34 26 59 4 41 26 5 271 -63 34 18 28 34 35 32 34 8 15 34 45 48 - 55 0 0 34 22 44 4 41 29 4 271 -62 34 14 12 34 31 16 34 4 0 34 41 33 - 54 0 0 34 18 36 4 41 31 3 272 -62 34 10 4 34 27 8 33 59 52 34 37 24 - 53 0 0 34 14 34 4 41 32 3 272 -61 34 6 3 34 23 6 33 55 51 34 33 22 - 52 0 0 34 10 40 4 41 33 2 273 -61 34 2 9 34 19 12 33 51 58 34 29 28 - 51 0 0 34 6 53 4 41 34 1 273 -60 33 58 23 34 15 25 33 48 11 34 25 41 - 50 0 0 34 3 14 4 41 34 0 274 -59 33 54 43 34 11 45 33 44 32 34 22 1 Uncertainty in time = +/- 4 secs Prediction of 2009 Oct 16.0 Data for the target star ------------------------ * name: TYC 0546-01851-1 * constellation : Pegasus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 34 55.1795 DE: +03 21 25.942 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .020 ) * V mag [mag]: 9.6 * B mag [mag]: 10.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (433) Eros approx. diameter [km]: 24 approx. diameter ["]: .038 distance from Earth [AU]: 0.87300 * orbital information: orbit source: Preston date of fit: 2009 Oct 15 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 4783 number of rejected observations: 267 time covered by the observations: 1900 May 28 - 2009 Sep 29 1 sigma uncertainty ellipse (major, minor, PA): 0.011, 0.010, 179° remarks: * orbital elements for (433) Eros : Mean anomaly = 265.16600485 deg Arg. of pericenter = 178.74540898 deg Long. of node = 304.37309390 deg Inclination = 10.82939091 deg Eccentricity = 0.22277915 Semimajor axis = 1.45817066 AU Perihelion dist = 1.13332064 AU Mag: H = 10.75, G = 0.46 Epoch of elements : MJD 55131.18000000 TDT (2009 Oct 27.180) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Oct 27 433 Eros 4h 20.3m UT 9.6 21 34 55.179 3 21 25.94TYC 0546-01851-1 10.1 12.8 24 6.3 0.873 1.450 -2.18 -137.0157 3.360 110.90 -12.82 4.3386 0.06497 0.63479 2.15430 -0.21782 0.00407 0.00091 2000 264.50550420091026.00000178.745409304.373094 10.8293910.22277915 1.4581707 1.133320611.2 5.00.46 RATE 5.5974670 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.023 0.022 180 1.60 0.023 0 55120.0020091027_1851-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Oct 15, 17:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org