IOTA/IOTA-ES occultation update for (1020) Arcadia / TYC 6299-02576-1 event on 2009 Jun 11, 13:32 UT Visible from Summary ------- On 2009 Jun 11 UT, the 14 km diameter asteroid (1020) Arcadia will occult a 9.1 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.0 mag to 16.1 mag (the magnitude of the asteroid) for at most 2.1 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: 15 * date and approx. time of event: 2009 Jun 11, 13:23 - 2009 Jun 11, 13:44 UT * magnitude of target star: 9.1 * magnitude drop [mag]: 7.0 * estimated maximum duration [s]: 2.1 * Moon: 87 % sunlit, 10° distance * Sun: 145° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 4.58 * 1 sigma uncertainty interval [seconds]: +/- 13.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .068 +/- .046) * 1 sigma uncertainty ellipse (major, minor, PA): ( .068", .045", 83° ) * approx speed of asteroid's shadow [km/s]: 6.6002 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6299-02576-1 by 1020 Arcadia on 2009 Jun 11 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 113 0 0 38 10 14 13 44 48 1 110 -18 38 15 38 38 4 51 39 5 27 .. .. .. 114 0 0 37 53 23 13 44 48 2 111 -19 37 58 47 37 48 0 38 48 33 .. .. .. 115 0 0 37 36 36 13 44 47 2 111 -19 37 41 59 37 31 13 38 31 43 .. .. .. 116 0 0 37 19 53 13 44 46 3 112 -20 37 25 16 37 14 31 38 14 57 .. .. .. 117 0 0 37 3 15 13 44 45 4 113 -21 37 8 37 36 57 53 37 58 15 .. .. .. 118 0 0 36 46 41 13 44 44 5 113 -21 36 52 4 36 41 19 37 41 39 .. .. .. 119 0 0 36 30 13 13 44 42 6 114 -22 36 35 35 36 24 52 37 25 7 35 36 7 120 0 0 36 13 51 13 44 40 7 114 -23 36 19 13 36 8 30 37 8 41 35 19 48 121 0 0 35 57 35 13 44 38 7 115 -23 36 2 56 35 52 14 36 52 22 35 3 35 122 0 0 35 41 25 13 44 35 8 116 -24 35 46 46 35 36 4 36 36 8 34 47 29 123 0 0 35 25 22 13 44 32 9 116 -25 35 30 43 35 20 2 36 20 2 34 31 30 124 0 0 35 9 27 13 44 29 10 117 -25 35 14 47 35 4 7 36 4 2 34 15 38 125 0 0 34 53 39 13 44 26 11 117 -26 34 58 59 34 48 19 35 48 10 33 59 54 126 0 0 34 37 59 13 44 22 12 118 -27 34 43 18 34 32 40 35 32 27 33 44 18 127 0 0 34 22 27 13 44 18 13 119 -27 34 27 46 34 17 9 35 16 51 33 28 50 128 0 0 34 7 4 13 44 14 13 119 -28 34 12 23 34 1 46 35 1 24 33 13 31 129 0 0 33 51 51 13 44 9 14 120 -28 33 57 9 33 46 33 34 46 6 32 58 21 130 0 0 33 36 46 13 44 4 15 120 -29 33 42 4 33 31 29 34 30 57 32 43 21 131 0 0 33 21 51 13 43 59 16 121 -30 33 27 9 33 16 34 34 15 58 32 28 30 132 0 0 33 7 7 13 43 54 17 122 -30 33 12 24 33 1 50 34 1 9 32 13 50 133 0 0 32 52 32 13 43 48 17 122 -31 32 57 49 32 47 16 33 46 31 31 59 19 134 0 0 32 38 8 13 43 43 18 123 -31 32 43 25 32 32 53 33 32 3 31 45 0 135 0 0 32 23 56 13 43 37 19 123 -32 32 29 11 32 18 40 33 17 46 31 30 51 136 0 0 32 9 54 13 43 30 20 124 -32 32 15 9 32 4 39 33 3 40 31 16 53 137 0 0 31 56 4 13 43 24 21 125 -33 32 1 19 31 50 49 32 49 45 31 3 7 138 0 0 31 42 26 13 43 17 22 125 -33 31 47 40 31 37 11 32 36 2 30 49 33 139 0 0 31 28 59 13 43 9 22 126 -34 31 34 13 31 23 45 32 22 32 30 36 11 140 0 0 31 15 45 13 43 2 23 126 -34 31 20 59 31 10 32 32 9 13 30 23 1 141 0 0 31 2 44 13 42 54 24 127 -35 31 7 57 30 57 31 31 56 8 30 10 4 142 0 0 30 49 55 13 42 47 25 128 -35 30 55 8 30 44 43 31 43 15 29 57 19 143 0 0 30 37 19 13 42 38 26 128 -35 30 42 32 30 32 7 31 30 35 29 44 48 144 0 0 30 24 57 13 42 30 26 129 -36 30 30 9 30 19 45 31 18 8 29 32 29 145 0 0 30 12 48 13 42 22 27 130 -36 30 18 0 30 7 37 31 5 55 29 20 25 146 0 0 30 0 53 13 42 13 28 130 -36 30 6 4 29 55 42 30 53 56 29 8 33 147 0 0 29 49 12 13 42 4 29 131 -37 29 54 23 29 44 1 30 42 11 28 56 56 148 0 0 29 37 45 13 41 54 29 132 -37 29 42 55 29 32 35 30 30 40 28 45 33 149 0 0 29 26 32 13 41 45 30 132 -37 29 31 42 29 21 22 30 19 23 28 34 24 150 0 0 29 15 34 13 41 35 31 133 -38 29 20 43 29 10 24 30 8 21 28 23 29 151 0 0 29 4 50 13 41 25 32 134 -38 29 9 59 28 59 41 29 57 33 28 12 50 152 0 0 28 54 21 13 41 15 32 135 -38 28 59 30 28 49 13 29 47 0 28 2 24 153 0 0 28 44 8 13 41 5 33 135 -38 28 49 16 28 38 59 29 36 43 27 52 14 154 0 0 28 34 9 13 40 55 34 136 -38 28 39 17 28 29 1 29 26 41 27 42 19 155 0 0 28 24 26 13 40 44 34 137 -39 28 29 34 28 19 18 29 16 54 27 32 40 156 0 0 28 14 58 13 40 33 35 138 -39 28 20 6 28 9 51 29 7 23 27 23 15 157 0 0 28 5 46 13 40 22 36 139 -39 28 10 54 28 0 39 28 58 7 27 14 7 158 0 0 27 56 50 13 40 11 36 140 -39 28 1 57 27 51 43 28 49 8 27 5 14 159 0 0 27 48 10 13 39 59 37 140 -39 27 53 16 27 43 3 28 40 24 26 56 37 160 0 0 27 39 45 13 39 48 38 141 -39 27 44 52 27 34 40 28 31 57 26 48 15 161 0 0 27 31 37 13 39 36 38 142 -39 27 36 43 27 26 32 28 23 45 26 40 10 162 0 0 27 23 45 13 39 24 39 143 -39 27 28 51 27 18 40 28 15 50 26 32 21 163 0 0 27 16 10 13 39 12 40 144 -39 27 21 15 27 11 5 28 8 12 26 24 49 164 0 0 27 8 51 13 39 0 40 145 -39 27 13 56 27 3 46 28 0 50 26 17 33 165 0 0 27 1 49 13 38 47 41 146 -39 27 6 53 26 56 44 27 53 45 26 10 33 166 0 0 26 55 3 13 38 35 41 147 -39 27 0 8 26 49 59 27 46 57 26 3 50 167 0 0 26 48 34 13 38 22 42 148 -39 26 53 38 26 43 30 27 40 25 25 57 23 168 0 0 26 42 22 13 38 10 42 149 -39 26 47 26 26 37 18 27 34 11 25 51 13 169 0 0 26 36 27 13 37 57 43 150 -39 26 41 31 26 31 23 27 28 13 25 45 21 170 0 0 26 30 49 13 37 44 43 151 -39 26 35 52 26 25 45 27 22 33 25 39 45 171 0 0 26 25 28 13 37 31 44 152 -38 26 30 31 26 20 24 27 17 10 25 34 26 172 0 0 26 20 24 13 37 17 44 153 -38 26 25 27 26 15 21 27 12 4 25 29 24 173 0 0 26 15 37 13 37 4 45 154 -38 26 20 40 26 10 34 27 7 15 25 24 39 174 0 0 26 11 8 13 36 51 45 156 -38 26 16 11 26 6 5 27 2 44 25 20 11 175 0 0 26 6 56 13 36 37 46 157 -37 26 11 58 26 1 53 26 58 30 25 16 1 176 0 0 26 3 1 13 36 24 46 158 -37 26 8 3 25 57 59 26 54 34 25 12 8 177 0 0 25 59 24 13 36 10 46 159 -37 26 4 26 25 54 21 26 50 55 25 8 32 178 0 0 25 56 4 13 35 56 47 160 -37 26 1 6 25 51 2 26 47 34 25 5 13 179 0 0 25 53 1 13 35 42 47 162 -36 25 58 4 25 48 0 26 44 30 25 2 12 180 0 0 25 50 17 13 35 28 47 163 -36 25 55 19 25 45 15 26 41 44 24 59 28 -179 0 0 25 47 49 13 35 15 48 164 -36 25 52 51 25 42 48 26 39 16 24 57 2 -178 0 0 25 45 40 13 35 1 48 165 -35 25 50 42 25 40 38 26 37 5 24 54 53 -177 0 0 25 43 48 13 34 46 48 167 -35 25 48 50 25 38 46 26 35 12 24 53 2 -176 0 0 25 42 13 13 34 32 48 168 -34 25 47 15 25 37 12 26 33 37 24 51 28 -175 0 0 25 40 57 13 34 18 48 169 -34 25 45 58 25 35 55 26 32 20 24 50 12 -174 0 0 25 39 57 13 34 4 49 171 -34 25 44 59 25 34 56 26 31 21 24 49 13 -173 0 0 25 39 16 13 33 50 49 172 -33 25 44 18 25 34 15 26 30 39 24 48 32 -172 0 0 25 38 52 13 33 35 49 173 -33 25 43 54 25 33 51 26 30 15 24 48 9 -171 0 0 25 38 46 13 33 21 49 175 -32 25 43 48 25 33 45 26 30 9 24 48 3 -170 0 0 25 38 58 13 33 7 49 176 -32 25 43 59 25 33 56 26 30 20 24 48 14 -169 0 0 25 39 27 13 32 53 49 178 -31 25 44 28 25 34 26 26 30 50 24 48 43 -168 0 0 25 40 14 13 32 38 49 179 -31 25 45 15 25 35 12 26 31 37 24 49 30 -167 0 0 25 41 18 13 32 24 49 180 -30 25 46 20 25 36 17 26 32 42 24 50 34 -166 0 0 25 42 40 13 32 10 49 182 -29 25 47 42 25 37 39 26 34 4 24 51 56 -165 0 0 25 44 20 13 31 55 49 183 -29 25 49 22 25 39 19 26 35 45 24 53 35 -164 0 0 25 46 17 13 31 41 49 185 -28 25 51 19 25 41 16 26 37 43 24 55 31 -163 0 0 25 48 32 13 31 27 49 186 -28 25 53 34 25 43 31 26 39 58 24 57 45 -162 0 0 25 51 5 13 31 13 49 187 -27 25 56 7 25 46 3 26 42 32 25 0 17 -161 0 0 25 53 54 13 30 59 48 189 -27 25 58 57 25 48 53 26 45 23 25 3 6 -160 0 0 25 57 2 13 30 44 48 190 -26 26 2 4 25 52 0 26 48 31 25 6 12 -159 0 0 26 0 27 13 30 30 48 191 -25 26 5 29 25 55 24 26 51 57 25 9 35 -158 0 0 26 4 9 13 30 16 48 193 -25 26 9 11 25 59 6 26 55 41 25 13 16 -157 0 0 26 8 8 13 30 2 48 194 -24 26 13 11 26 3 6 26 59 42 25 17 14 -156 0 0 26 12 25 13 29 48 47 195 -23 26 17 27 26 7 22 27 4 0 25 21 29 -155 0 0 26 16 58 13 29 34 47 196 -23 26 22 1 26 11 56 27 8 36 25 26 1 -154 0 0 26 21 49 13 29 21 47 198 -22 26 26 53 26 16 47 27 13 28 25 30 50 -153 0 0 26 26 57 13 29 7 46 199 -21 26 32 1 26 21 54 27 18 38 25 35 56 -152 0 0 26 32 22 13 28 53 46 200 -21 26 37 26 26 27 19 27 24 6 25 41 19 -151 0 0 26 38 4 13 28 40 46 201 -20 26 43 8 26 33 1 27 29 50 25 46 59 -150 0 0 26 44 3 13 28 26 45 203 -19 26 49 7 26 39 0 27 35 51 25 52 56 -149 0 0 26 50 19 13 28 13 45 204 -18 26 55 23 26 45 15 27 42 9 25 59 9 -148 0 0 26 56 51 13 27 59 44 205 -18 27 1 56 26 51 47 27 48 44 26 5 39 -147 0 0 27 3 40 13 27 46 44 206 -17 27 8 45 26 58 36 27 55 35 26 12 25 -146 0 0 27 10 45 13 27 33 43 207 -16 27 15 50 27 5 41 28 2 43 26 19 28 -145 0 0 27 18 7 13 27 20 43 208 -16 27 23 12 27 13 2 28 10 8 26 26 47 -144 0 0 27 25 45 13 27 7 42 209 -15 27 30 51 27 20 40 28 17 48 26 34 22 -143 0 0 27 33 39 13 26 55 42 210 -14 27 38 45 27 28 34 28 25 46 26 42 14 -142 0 0 27 41 49 13 26 42 41 211 -13 27 46 56 27 36 44 28 33 59 26 50 21 -141 0 0 27 50 16 13 26 30 41 212 -12 27 55 22 27 45 10 28 42 28 26 58 44 -140 0 0 27 58 58 13 26 17 40 213 -12 28 4 4 27 53 51 28 51 13 27 7 23 -139 0 0 28 7 55 13 26 5 40 214 -11 28 13 2 28 2 49 29 0 14 27 16 18 -138 0 0 28 17 9 13 25 53 39 215 -10 28 22 16 28 12 1 29 9 31 27 25 27 -137 0 0 28 26 37 13 25 41 38 216 -9 28 31 45 28 21 30 29 19 3 27 34 53 -136 0 0 28 36 21 13 25 29 38 217 -9 28 41 29 28 31 13 29 28 51 27 44 33 -135 0 0 28 46 20 13 25 18 37 218 -8 28 51 28 28 41 12 29 38 53 27 54 29 -134 0 0 28 56 34 13 25 7 36 219 -7 29 1 43 28 51 26 29 49 11 28 4 39 -133 0 0 29 7 3 13 24 55 36 220 -6 29 12 12 29 1 54 29 59 43 28 15 4 -132 0 0 29 17 46 13 24 44 35 220 -5 29 22 56 29 12 37 30 10 31 28 25 44 -131 0 0 29 28 44 13 24 34 34 221 -5 29 33 54 29 23 34 30 21 32 28 36 38 -130 0 0 29 39 56 13 24 23 34 222 -4 29 45 6 29 34 46 30 32 48 28 47 46 -129 0 0 29 51 22 13 24 12 33 223 -3 29 56 33 29 46 12 30 44 18 28 59 8 -128 0 0 30 3 2 13 24 2 32 224 -2 30 8 13 29 57 51 30 56 2 29 10 45 -127 0 0 30 14 55 13 23 52 32 224 -1 30 20 7 30 9 44 31 8 0 29 22 34 -126 0 0 30 27 2 13 23 42 31 225 0 30 32 14 30 21 51 31 20 11 29 34 37 Uncertainty in time = +/- 14 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 6299-02576-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 42 50.3748 DE: -15 21 11.045 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .025 ) * V mag [mag]: 9.1 * B mag [mag]: 9.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1020) Arcadia approx. diameter [km]: 14 approx. diameter ["]: .010 distance from Earth [AU]: 1.84300 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1036 number of rejected observations: 16 time covered by the observations: 1924 Mar 08 - 2008 Apr 01 1 sigma uncertainty ellipse (major, minor, PA): 0.065, 0.038, 82° remarks: * orbital elements for (1020) Arcadia : Mean anomaly = 60.27674414 deg Arg. of pericenter = 37.64797604 deg Long. of node = 180.80400323 deg Inclination = 4.05052443 deg Eccentricity = 0.03970741 Semimajor axis = 2.79110914 AU Perihelion dist = 2.68028142 AU Mag: H = 12.06, G = 0.15 Epoch of elements : MJD 54993.56400000 TDT (2009 Jun 11.564) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 11 1020 Arcadia 13h 32.6m UT 9.1 19 42 50.375-15 21 11.05TYC 6299-02576-1 9.4 16.1 14 2.1 1.843 -1.230 -0.30 -167.4742 -15.352 -23.23 23.12 13.5439 -0.01021 0.65367 -3.72481 -0.06251 -0.00300 -0.00100 2000 59.5234292009 6 8.00000 37.647976180.804003 4.0505240.03970741 2.7911091 2.680281411.9 5.00.15 RATE 2.1136780 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.068 0.045 83 5.58 0.048 0 54581.5020090611_2576-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 07:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org