IOTA/IOTA-ES occultation update for (576) Emanuela / TYC 5759-01541-1 event on 2008 Oct 15, 15:02 UT Visible from China, India Summary ------- On 2008 Oct 15 UT, the 85 km diameter asteroid (576) Emanuela will occult a 10.8 mag star in the constellation Aquarius for observers along a path across China, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.1 mag to 13.8 mag (the magnitude of the asteroid) for at most 7.8 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 97 * date and approx. time of event: 2008 Oct 15, 15:00 - 2008 Oct 15, 15:10 UT * magnitude of target star: 10.8 * magnitude drop [mag]: 3.1 * estimated maximum duration [s]: 7.8 * Moon: 99 % sunlit, 83° distance * Sun: 107° distance * rough path description: China, India The occultation path -------------------- * approximate projected width [km]: 97 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 3.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .024 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .024", .023", 81° ) * approx speed of asteroid's shadow [km/s]: 10.9036 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5759-01541-1 by 576 Emanuela on 2008 Oct 15 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 40 0 0 13 10 2 15 0 4 58 139 -1 12 42 40 13 37 31 12 21 58 13 58 29 41 0 0 13 26 48 15 0 14 59 141 -2 12 59 24 13 54 20 12 38 39 14 15 20 42 0 0 13 43 57 15 0 25 59 142 -3 13 16 30 14 11 32 12 55 43 14 32 34 43 0 0 14 1 28 15 0 36 60 144 -4 13 33 58 14 29 6 13 13 9 14 50 11 44 0 0 14 19 21 15 0 46 60 146 -5 13 51 49 14 47 2 13 30 57 15 8 9 45 0 0 14 37 36 15 0 57 60 148 -6 14 10 0 15 5 19 13 49 7 15 26 29 46 0 0 14 56 12 15 1 8 60 150 -7 14 28 33 15 23 58 14 7 38 15 45 9 47 0 0 15 15 8 15 1 18 61 153 -8 14 47 26 15 42 57 14 26 29 16 4 11 48 0 0 15 34 24 15 1 29 61 155 -9 15 6 40 16 2 16 14 45 40 16 23 32 49 0 0 15 54 0 15 1 40 61 157 -10 15 26 13 16 21 55 15 5 12 16 43 13 50 0 0 16 13 56 15 1 51 61 159 -11 15 46 6 16 41 53 15 25 2 17 3 14 51 0 0 16 34 10 15 2 1 61 161 -12 16 6 17 17 2 10 15 45 11 17 23 33 52 0 0 16 54 42 15 2 12 61 164 -13 16 26 47 17 22 45 16 5 38 17 44 10 53 0 0 17 15 32 15 2 23 61 166 -14 16 47 34 17 43 38 16 26 24 18 5 5 54 0 0 17 36 39 15 2 34 61 168 -15 17 8 38 18 4 48 16 47 26 18 26 17 55 0 0 17 58 3 15 2 45 61 170 -16 17 29 59 18 26 14 17 8 45 18 47 46 56 0 0 18 19 42 15 2 55 60 172 -17 17 51 36 18 47 57 17 30 20 19 9 30 57 0 0 18 41 37 15 3 6 60 174 -18 18 13 28 19 9 54 17 52 10 19 31 30 58 0 0 19 3 47 15 3 17 60 177 -19 18 35 36 19 32 7 18 14 15 19 53 44 59 0 0 19 26 11 15 3 27 60 179 -20 18 57 57 19 54 33 18 36 35 20 16 13 60 0 0 19 48 48 15 3 38 59 181 -21 19 20 32 20 17 13 18 59 8 20 38 55 61 0 0 20 11 39 15 3 48 59 183 -22 19 43 20 20 40 6 19 21 54 21 1 49 62 0 0 20 34 41 15 3 59 58 185 -23 20 6 20 21 3 11 19 44 52 21 24 56 63 0 0 20 57 55 15 4 9 58 186 -24 20 29 32 21 26 27 20 8 2 21 48 14 64 0 0 21 21 20 15 4 20 57 188 -25 20 52 54 21 49 55 20 31 23 22 11 43 65 0 0 21 44 55 15 4 30 57 190 -26 21 16 27 22 13 32 20 54 55 22 35 22 66 0 0 22 8 40 15 4 40 56 192 -27 21 40 10 22 37 18 21 18 35 22 59 10 67 0 0 22 32 33 15 4 50 56 193 -28 22 4 1 23 1 14 21 42 25 23 23 7 68 0 0 22 56 35 15 5 0 55 195 -29 22 28 0 23 25 17 22 6 23 23 47 12 69 0 0 23 20 43 15 5 10 54 197 -30 22 52 7 23 49 28 22 30 29 24 11 24 70 0 0 23 44 59 15 5 20 54 198 -31 23 16 21 24 13 45 22 54 41 24 35 42 71 0 0 24 9 20 15 5 29 53 200 -32 23 40 40 24 38 7 23 18 59 25 0 6 72 0 0 24 33 46 15 5 39 52 201 -33 24 5 5 25 2 35 23 43 23 25 24 35 73 0 0 24 58 17 15 5 48 52 202 -34 24 29 35 25 27 8 24 7 51 25 49 9 74 0 0 25 22 51 15 5 58 51 204 -34 24 54 8 25 51 43 24 32 23 26 13 46 75 0 0 25 47 29 15 6 7 50 205 -35 25 18 44 26 16 22 24 56 59 26 38 25 76 0 0 26 12 8 15 6 16 49 206 -36 25 43 22 26 41 3 25 21 36 27 3 7 77 0 0 26 36 49 15 6 25 49 207 -37 26 8 2 27 5 45 25 46 16 27 27 50 78 0 0 27 1 31 15 6 34 48 209 -38 26 32 43 27 30 28 26 10 56 27 52 33 79 0 0 27 26 13 15 6 42 47 210 -39 26 57 25 27 55 10 26 35 37 28 17 16 80 0 0 27 50 54 15 6 51 46 211 -40 27 22 5 28 19 52 27 0 17 28 41 59 81 0 0 28 15 34 15 6 59 45 212 -40 27 46 45 28 44 33 27 24 56 29 6 40 82 0 0 28 40 12 15 7 8 44 213 -41 28 11 22 29 9 11 27 49 33 29 31 18 83 0 0 29 4 47 15 7 16 44 214 -42 28 35 57 29 33 46 28 14 7 29 55 54 84 0 0 29 29 19 15 7 24 43 215 -43 29 0 28 29 58 18 28 38 38 30 20 26 85 0 0 29 53 46 15 7 31 42 216 -43 29 24 56 30 22 46 29 3 6 30 44 54 86 0 0 30 18 9 15 7 39 41 217 -44 29 49 18 30 47 9 29 27 29 31 9 16 87 0 0 30 42 27 15 7 46 40 218 -45 30 13 36 31 11 26 29 51 46 31 33 34 88 0 0 31 6 38 15 7 54 39 219 -46 30 37 48 31 35 37 30 15 58 31 57 44 89 0 0 31 30 43 15 8 1 39 219 -46 31 1 53 31 59 41 30 40 3 32 21 48 90 0 0 31 54 40 15 8 8 38 220 -47 31 25 50 32 23 38 31 4 2 32 45 45 91 0 0 32 18 29 15 8 14 37 221 -47 31 49 41 32 47 27 31 27 52 33 9 33 92 0 0 32 42 11 15 8 21 36 222 -48 32 13 22 33 11 7 31 51 35 33 33 13 93 0 0 33 5 43 15 8 27 35 223 -49 32 36 55 33 34 39 32 15 8 33 56 44 94 0 0 33 29 5 15 8 34 34 224 -49 33 0 19 33 58 0 32 38 32 34 20 5 95 0 0 33 52 18 15 8 40 33 224 -50 33 23 32 34 21 12 33 1 47 34 43 15 96 0 0 34 15 20 15 8 46 32 225 -50 33 46 35 34 44 12 33 24 50 35 6 15 97 0 0 34 38 10 15 8 51 32 226 -51 34 9 27 35 7 2 33 47 43 35 29 4 98 0 0 35 0 50 15 8 57 31 227 -51 34 32 8 35 29 40 34 10 25 35 51 41 99 0 0 35 23 17 15 9 2 30 228 -52 34 54 37 35 52 6 34 32 55 36 14 5 100 0 0 35 45 32 15 9 7 29 228 -52 35 16 53 36 14 19 34 55 12 36 36 18 101 0 0 36 7 34 15 9 12 28 229 -53 35 38 57 36 36 19 35 17 17 36 58 17 102 0 0 36 29 23 15 9 17 27 230 -53 36 0 47 36 58 7 35 39 9 37 20 3 103 0 0 36 50 58 15 9 22 26 231 -53 36 22 24 37 19 40 36 0 47 37 41 34 104 0 0 37 12 19 15 9 26 26 231 -54 36 43 47 37 40 59 36 22 12 38 2 52 105 0 0 37 33 26 15 9 31 25 232 -54 37 4 56 38 2 4 36 43 22 38 23 56 106 0 0 37 54 18 15 9 35 24 233 -54 37 25 50 38 22 54 37 4 17 38 44 44 107 0 0 38 14 55 15 9 39 23 233 -55 37 46 29 38 43 29 37 24 58 39 5 17 108 0 0 38 35 17 15 9 43 22 234 -55 38 6 53 39 3 49 37 45 24 39 25 35 109 0 0 38 55 23 15 9 47 21 235 -55 38 27 2 39 23 53 38 5 34 39 45 38 110 0 0 39 15 13 15 9 50 20 236 -55 38 46 54 39 43 41 38 25 28 40 5 24 111 0 0 39 34 48 15 9 54 20 236 -55 39 6 31 40 3 13 38 45 7 40 24 54 112 0 0 39 54 6 15 9 57 19 237 -55 39 25 51 40 22 28 39 4 29 40 44 8 113 0 0 40 13 7 15 10 0 18 238 -56 39 44 55 40 41 27 39 23 35 41 3 5 114 0 0 40 31 52 15 10 3 17 238 -56 40 3 43 41 0 10 39 42 24 41 21 46 115 0 0 40 50 20 15 10 6 16 239 -56 40 22 13 41 18 35 40 0 56 41 40 9 116 0 0 41 8 31 15 10 8 16 240 -56 40 40 27 41 36 43 40 19 12 41 58 15 117 0 0 41 26 25 15 10 11 15 240 -56 40 58 23 41 54 35 40 37 10 42 16 4 118 0 0 41 44 1 15 10 13 14 241 -56 41 16 2 42 12 8 40 54 51 42 33 36 119 0 0 42 1 20 15 10 15 13 242 -56 41 33 23 42 29 24 41 12 14 42 50 50 120 0 0 42 18 21 15 10 17 12 243 -56 41 50 27 42 46 23 41 29 20 43 7 47 121 0 0 42 35 5 15 10 19 12 243 -56 42 7 13 43 3 4 41 46 8 43 24 25 122 0 0 42 51 30 15 10 21 11 244 -55 42 23 42 43 19 27 42 2 39 43 40 46 123 0 0 43 7 38 15 10 23 10 245 -55 42 39 52 43 35 32 42 18 52 43 56 49 124 0 0 43 23 28 15 10 24 9 245 -55 42 55 45 43 51 19 42 34 46 44 12 34 125 0 0 43 39 0 15 10 25 8 246 -55 43 11 20 44 6 48 42 50 23 44 28 1 126 0 0 43 54 14 15 10 27 8 247 -55 43 26 37 44 21 59 43 5 42 44 43 10 127 0 0 44 9 10 15 10 28 7 247 -55 43 41 35 44 36 53 43 20 42 44 58 1 128 0 0 44 23 48 15 10 29 6 248 -54 43 56 16 44 51 27 43 35 25 45 12 34 129 0 0 44 38 7 15 10 30 5 249 -54 44 10 38 45 5 44 43 49 49 45 26 49 130 0 0 44 52 9 15 10 30 5 250 -54 44 24 42 45 19 43 44 3 56 45 40 45 131 0 0 45 5 52 15 10 31 4 250 -54 44 38 28 45 33 24 44 17 44 45 54 24 132 0 0 45 19 17 15 10 32 3 251 -53 44 51 56 45 46 46 44 31 13 46 7 44 133 0 0 45 32 24 15 10 32 2 252 -53 45 5 6 45 59 50 44 44 25 46 20 47 134 0 0 45 45 13 15 10 32 2 252 -53 45 17 57 46 12 37 44 57 18 46 33 31 135 0 0 45 57 44 15 10 32 1 253 -53 45 30 30 46 25 5 45 9 54 46 45 57 136 0 0 46 9 56 15 10 33 0 254 -52 45 42 46 46 37 15 45 22 11 .. .. .. Uncertainty in time = +/- 3 secs [Prediction of 2008 Oct 1.0] Data for the target star ------------------------ * name: TYC 5759-01541-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 39 56.8956 DE: -11 04 24.492 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .021 ) * V mag [mag]: 10.8 * B mag [mag]: 11.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (576) Emanuela approx. diameter [km]: 85 approx. diameter ["]: .061 distance from Earth [AU]: 1.91000 * orbital information: orbit source: Preston date of fit: 2008 Sep 30 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 827 number of rejected observations: 61 time covered by the observations: 1924 Mar 08 - 2008 Sep 25 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.010, 61° remarks: * orbital elements for (576) Emanuela : Mean anomaly = 4.78909556 deg Arg. of pericenter = 26.16829481 deg Long. of node = 299.98597478 deg Inclination = 10.23445210 deg Eccentricity = 0.19772288 Semimajor axis = 2.98393017 AU Perihelion dist = 2.39393891 AU Mag: H = 9.22, G = 0.15 Epoch of elements : MJD 54754.62700000 TDT (2008 Oct 15.627) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Oct 15 576 Emanuela 15h 2.0m UT 10.8 20 39 56.896-11 4 24.49TYC 5759-01541-1 11.2 13.8 85 7.8 1.910 1.829 8.84 59.9634 -11.075 -49.09 -8.81 15.0338 -0.15112 0.45952 5.84712 1.91995 0.00522 0.00118 2000 3.90434620081011.00000 26.168295299.985975 10.2344520.19772288 2.9839302 2.3939389 9.4 5.00.15 RATE 1.9121460 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.024 0.023 81 1.38 0.023 0 54740.5020081015_1541-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 01, 04:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org