IOTA/IOTA-ES occultation update for (2066) Palala / TYC 5624-00374-1 event on 2008 May 19, 08:35 UT Visible from Caribbean, Mexico Summary ------- On 2008 May 19 UT, the 19 km diameter asteroid (2066) Palala will occult a 11.4 mag star in the constellation Scorpius for observers along a path across Caribbean, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.3 mag to 14.6 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: 26 * date and approx. time of event: 2008 May 19, 08:24 - 2008 May 19, 08:46 UT * magnitude of target star: 11.4 * magnitude drop [mag]: 3.3 * estimated maximum duration [s]: 2.5 * Moon: 99 % sunlit, 17° distance * Sun: 172° distance * rough path description: Caribbean, Mexico The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 2.55 * 1 sigma uncertainty interval [seconds]: +/- 9.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .097 +/- .062) * 1 sigma uncertainty ellipse (major, minor, PA): ( .098", .061", 101° ) * approx speed of asteroid's shadow [km/s]: 7.5405 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5624-00374-1 by 2066 Palala on 2008 May 19 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 157 0 0 39 24 32 8 46 50 1 110 -2 39 31 17 39 17 47 40 5 53 .. .. .. 158 0 0 39 7 55 8 46 50 1 111 -2 39 14 40 39 1 10 39 49 17 .. .. .. 159 0 0 38 51 12 8 46 49 2 111 -3 38 57 58 38 44 27 39 32 35 .. .. .. 160 0 0 38 34 24 8 46 48 3 112 -4 38 41 10 38 27 40 39 15 47 .. .. .. 161 0 0 38 17 32 8 46 48 4 112 -5 38 24 17 38 10 47 38 58 55 37 36 31 162 0 0 38 0 35 8 46 46 5 113 -6 38 7 20 37 53 50 38 41 58 37 19 33 163 0 0 37 43 33 8 46 45 6 114 -7 37 50 19 37 36 48 38 24 57 37 2 32 164 0 0 37 26 28 8 46 44 6 114 -7 37 33 14 37 19 43 38 7 52 36 45 27 165 0 0 37 9 19 8 46 42 7 115 -8 37 16 5 37 2 34 37 50 43 36 28 18 166 0 0 36 52 8 8 46 40 8 115 -9 36 58 53 36 45 23 37 33 31 36 11 7 167 0 0 36 34 53 8 46 38 9 116 -10 36 41 39 36 28 9 37 16 16 35 53 53 168 0 0 36 17 37 8 46 35 10 117 -11 36 24 22 36 10 52 36 58 59 35 36 37 169 0 0 36 0 18 8 46 32 11 117 -12 36 7 4 35 53 34 36 41 40 35 19 19 170 0 0 35 42 58 8 46 30 11 118 -12 35 49 43 35 36 14 36 24 20 35 1 59 171 0 0 35 25 37 8 46 26 12 118 -13 35 32 22 35 18 52 36 6 58 34 44 39 172 0 0 35 8 15 8 46 23 13 119 -14 35 15 0 35 1 31 35 49 35 34 27 17 173 0 0 34 50 53 8 46 19 14 120 -15 34 57 37 34 44 8 35 32 11 34 9 56 174 0 0 34 33 30 8 46 16 15 120 -16 34 40 15 34 26 46 35 14 48 33 52 35 175 0 0 34 16 8 8 46 11 16 121 -16 34 22 53 34 9 24 34 57 25 33 35 14 176 0 0 33 58 47 8 46 7 16 121 -17 34 5 31 33 52 4 34 40 2 33 17 54 177 0 0 33 41 27 8 46 3 17 122 -18 33 48 11 33 34 44 34 22 41 33 0 35 178 0 0 33 24 9 8 45 58 18 123 -19 33 30 53 33 17 26 34 5 21 32 43 19 179 0 0 33 6 52 8 45 53 19 123 -20 33 13 36 33 0 9 33 48 3 32 26 4 180 0 0 32 49 38 8 45 48 20 124 -20 32 56 22 32 42 56 33 30 48 32 8 51 -179 0 0 32 32 27 8 45 42 21 124 -21 32 39 10 32 25 45 33 13 35 31 51 41 -178 0 0 32 15 19 8 45 37 22 125 -22 32 22 1 32 8 37 32 56 25 31 34 35 -177 0 0 31 58 14 8 45 31 22 126 -23 32 4 56 31 51 32 32 39 18 31 17 32 -176 0 0 31 41 13 8 45 25 23 126 -24 31 47 55 31 34 32 32 22 15 31 0 33 -175 0 0 31 24 17 8 45 18 24 127 -24 31 30 58 31 17 35 32 5 16 30 43 39 -174 0 0 31 7 25 8 45 12 25 128 -25 31 14 6 31 0 44 31 48 22 30 26 49 -173 0 0 30 50 38 8 45 5 26 128 -26 30 57 19 30 43 57 31 31 33 30 10 4 -172 0 0 30 33 56 8 44 58 27 129 -27 30 40 37 30 27 16 31 14 49 29 53 24 -171 0 0 30 17 20 8 44 51 27 130 -28 30 24 0 30 10 40 30 58 11 29 36 51 -170 0 0 30 0 50 8 44 43 28 130 -28 30 7 30 29 54 11 30 41 39 29 20 23 -169 0 0 29 44 27 8 44 36 29 131 -29 29 51 6 29 37 48 30 25 13 29 4 2 -168 0 0 29 28 10 8 44 28 30 132 -30 29 34 49 29 21 31 30 8 54 28 47 48 -167 0 0 29 12 0 8 44 20 31 132 -31 29 18 39 29 5 22 29 52 42 28 31 40 -166 0 0 28 55 58 8 44 11 31 133 -31 29 2 37 28 49 21 29 36 37 28 15 41 -165 0 0 28 40 4 8 44 3 32 134 -32 28 46 42 28 33 27 29 20 40 27 59 49 -164 0 0 28 24 18 8 43 54 33 134 -33 28 30 55 28 17 41 29 4 51 27 44 5 -163 0 0 28 8 40 8 43 46 34 135 -33 28 15 17 28 2 4 28 49 11 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7 52 -148 0 0 24 34 28 8 41 13 45 148 -43 24 40 58 24 27 58 25 14 18 23 54 58 -147 0 0 24 21 45 8 41 1 45 149 -43 24 28 15 24 15 15 25 1 32 23 42 17 -146 0 0 24 9 14 8 40 50 46 150 -44 24 15 44 24 2 45 24 48 59 23 29 49 -145 0 0 23 56 57 8 40 38 46 151 -44 24 3 26 23 50 28 24 36 39 23 17 35 -144 0 0 23 44 53 8 40 26 47 152 -45 23 51 22 23 38 25 24 24 32 23 5 34 -143 0 0 23 33 3 8 40 15 48 153 -45 23 39 31 23 26 35 24 12 40 22 53 46 -142 0 0 23 21 27 8 40 3 48 154 -46 23 27 55 23 15 0 24 1 1 22 42 12 -141 0 0 23 10 5 8 39 50 49 156 -46 23 16 32 23 3 38 23 49 37 22 30 53 -140 0 0 22 58 57 8 39 38 49 157 -46 23 5 24 22 52 31 23 38 26 22 19 47 -139 0 0 22 48 4 8 39 26 50 158 -47 22 54 30 22 41 38 23 27 30 22 8 56 -138 0 0 22 37 25 8 39 14 50 159 -47 22 43 51 22 30 59 23 16 49 21 58 20 -137 0 0 22 27 1 8 39 1 51 161 -47 22 33 27 22 20 36 23 6 23 21 47 58 -136 0 0 22 16 52 8 38 49 51 162 -48 22 23 18 22 10 27 22 56 12 21 37 52 -135 0 0 22 6 58 8 38 36 52 163 -48 22 13 24 22 0 34 22 46 16 21 28 0 -134 0 0 21 57 20 8 38 23 52 165 -48 22 3 45 21 50 56 22 36 35 21 18 24 -133 0 0 21 47 57 8 38 11 52 166 -48 21 54 21 21 41 33 22 27 10 21 9 3 -132 0 0 21 38 49 8 37 58 53 167 -49 21 45 14 21 32 26 22 18 0 20 59 58 -131 0 0 21 29 58 8 37 45 53 169 -49 21 36 22 21 23 35 22 9 7 20 51 8 -130 0 0 21 21 22 8 37 32 53 170 -49 21 27 45 21 14 59 22 0 29 20 42 34 -129 0 0 21 13 2 8 37 19 54 172 -49 21 19 25 21 6 40 21 52 7 20 34 16 -128 0 0 21 4 59 8 37 6 54 173 -49 21 11 21 20 58 36 21 44 2 20 26 14 -127 0 0 20 57 11 8 36 53 54 175 -49 21 3 34 20 50 49 21 36 12 20 18 29 -126 0 0 20 49 40 8 36 40 54 176 -49 20 56 3 20 43 19 21 28 40 20 11 0 -125 0 0 20 42 26 8 36 27 54 178 -49 20 48 48 20 36 5 21 21 24 20 3 47 -124 0 0 20 35 28 8 36 14 55 180 -49 20 41 50 20 29 7 21 14 24 19 56 51 -123 0 0 20 28 47 8 36 1 55 181 -49 20 35 9 20 22 26 21 7 42 19 50 11 -122 0 0 20 22 23 8 35 48 55 183 -49 20 28 44 20 16 2 21 1 16 19 43 49 -121 0 0 20 16 16 8 35 34 55 184 -49 20 22 37 20 9 55 20 55 7 19 37 43 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51 - 92 0 0 19 26 45 8 29 29 45 223 -37 19 33 4 19 20 26 20 5 28 18 48 20 - 91 0 0 19 29 33 8 29 17 44 224 -36 19 35 53 19 23 14 20 8 17 18 51 8 - 90 0 0 19 32 40 8 29 6 43 225 -36 19 39 0 19 26 21 20 11 25 18 54 14 - 89 0 0 19 36 6 8 28 55 43 226 -35 19 42 26 19 29 46 20 14 51 18 57 38 - 88 0 0 19 39 49 8 28 44 42 226 -34 19 46 9 19 33 29 20 18 36 19 1 20 - 87 0 0 19 43 50 8 28 33 41 227 -34 19 50 11 19 37 30 20 22 38 19 5 21 - 86 0 0 19 48 10 8 28 22 41 228 -33 19 54 30 19 41 50 20 26 59 19 9 39 - 85 0 0 19 52 47 8 28 12 40 229 -32 19 59 8 19 46 27 20 31 38 19 14 15 - 84 0 0 19 57 43 8 28 1 39 230 -31 20 4 4 19 51 22 20 36 35 19 19 9 - 83 0 0 20 2 57 8 27 51 38 230 -31 20 9 18 19 56 36 20 41 50 19 24 21 - 82 0 0 20 8 28 8 27 41 38 231 -30 20 14 50 20 2 7 20 47 23 19 29 51 - 81 0 0 20 14 18 8 27 31 37 232 -29 20 20 39 20 7 56 20 53 14 19 35 39 - 80 0 0 20 20 25 8 27 21 36 232 -28 20 26 47 20 14 3 20 59 23 19 41 45 - 79 0 0 20 26 50 8 27 12 35 233 -28 20 33 12 20 20 28 21 5 50 19 48 8 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0 22 37 39 8 25 12 23 241 -15 22 44 7 22 31 11 23 17 14 21 58 23 - 63 0 0 22 48 35 8 25 5 22 242 -14 22 55 3 22 42 7 23 28 13 22 9 17 - 62 0 0 22 59 47 8 24 59 21 242 -13 23 6 16 22 53 19 23 39 28 22 20 27 - 61 0 0 23 11 15 8 24 53 20 243 -13 23 17 44 23 4 46 23 50 58 22 31 52 - 60 0 0 23 22 58 8 24 48 19 243 -12 23 29 28 23 16 29 24 2 44 22 43 32 - 59 0 0 23 34 57 8 24 43 18 244 -11 23 41 27 23 28 27 24 14 46 22 55 28 - 58 0 0 23 47 10 8 24 37 18 244 -10 23 53 41 23 40 40 24 27 2 23 7 39 - 57 0 0 23 59 39 8 24 33 17 245 -9 24 6 10 23 53 8 24 39 34 23 20 4 - 56 0 0 24 12 22 8 24 28 16 245 -8 24 18 54 24 5 51 24 52 20 23 32 45 - 55 0 0 24 25 20 8 24 24 15 246 -7 24 31 52 24 18 48 25 5 20 23 45 39 - 54 0 0 24 38 31 8 24 19 14 246 -6 24 45 4 24 31 59 25 18 35 23 58 48 - 53 0 0 24 51 57 8 24 16 13 247 -5 24 58 30 24 45 25 25 32 4 24 12 11 - 52 0 0 25 5 37 8 24 12 12 247 -4 25 12 10 24 59 4 25 45 46 24 25 48 - 51 0 0 25 19 30 8 24 9 11 247 -4 25 26 4 25 12 56 25 59 42 24 39 38 - 50 0 0 25 33 36 8 24 6 10 248 -3 25 40 10 25 27 2 26 13 51 24 53 41 - 49 0 0 25 47 55 8 24 3 9 248 -2 25 54 30 25 41 21 26 28 13 25 7 57 - 48 0 0 26 2 27 8 24 0 8 249 -1 26 9 2 25 55 52 26 42 48 25 22 26 Uncertainty in time = +/- 10 secs [Prediction of 2008 May 8.0] Data for the target star ------------------------ * name: TYC 5624-00374-1 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 10 27.7016 DE: -14 56 18.440 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .042, .021 ) * V mag [mag]: 11.4 * B mag [mag]: 12.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2066) Palala approx. diameter [km]: 19 approx. diameter ["]: .024 distance from Earth [AU]: 1.08600 * orbital information: orbit source: Preston date of fit: 2008 May 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 881 number of rejected observations: 20 time covered by the observations: 1931 Oct 13 - 2008 Apr 16 1 sigma uncertainty ellipse (major, minor, PA): 0.089, 0.057, 103° remarks: * orbital elements for (2066) Palala : Mean anomaly = 10.50238776 deg Arg. of pericenter = 110.14470019 deg Long. of node = 117.24453187 deg Inclination = 3.75326215 deg Eccentricity = 0.12826195 Semimajor axis = 2.39376190 AU Perihelion dist = 2.08673334 AU Mag: H = 12.56, G = 0.15 Epoch of elements : MJD 54605.35800000 TDT (2008 May 19.358) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 19 2066 Palala 8h 35.3m UT 11.4 16 10 27.702-14 56 18.44TYC 5624-00374-1 12.4 14.6 19 2.5 1.086 -2.365 3.52 -123.6054 -14.938 50.29 19.88 8.5888 0.05895 0.57289 -4.23379 0.43469 -0.00053 -0.00045 2000 9.0765002008 514.00000110.144700117.244532 3.7532620.12826195 2.3937619 2.086733312.5 5.00.15 RATE 2.6612320 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.098 0.061 101 3.55 0.061 0 54594.5020080519_0374-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 May 08, 03:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org