IOTA/IOTA-ES occultation update for (599) Luisa / 2UCAC 12291698 event on 2008 Aug 05, 15:42 UT Visible from SE Asia, Indonesia Summary ------- On 2008 Aug 05 UT, the 65 km diameter asteroid (599) Luisa will occult a 12.3 mag star in the constellation Ara for observers along a path across SE Asia, Indonesia. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 12.2 mag (the magnitude of the asteroid) for at most 31.2 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: 78 * date and approx. time of event: 2008 Aug 05, 14:57 - 2008 Aug 05, 16:22 UT * midpoint of event [JD]: 2454684.15287917 * magnitude of target star: 12.3 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 31.2 * Moon: 21 % sunlit, 74° distance * Sun: 125° distance * rough path description: SE Asia, Indonesia The occultation path -------------------- * approximate projected width [km]: 77 * 1 sigma uncertainty interval [path widths]: +/- 0.71 * 1 sigma uncertainty interval [seconds]: +/- 16.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .036) * 1 sigma uncertainty ellipse (major, minor, PA): ( .046", .035", 105° ) * approx speed of asteroid's shadow [km/s]: 2.0825 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 12291698 by 599 Luisa on 2008 Aug 5 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude -137 41 31 -46 36 9 14 57 58 8 206 -15 -138 1 3 -47 36 37 -137 17 29 -45 28 2 -138 23 20 -48 53 29 -136 30 19 -43 28 39 -142 31 35 -50 54 51 14 59 3 14 209 -19 -142 42 22 -51 36 32 -142 19 26 -50 11 14 -142 55 37 -52 32 51 -141 59 26 -49 5 14 -146 51 59 -53 45 40 15 0 8 17 212 -21 -147 0 40 -54 20 38 -146 42 30 -53 9 41 -147 11 40 -55 8 43 -146 27 30 -52 16 37 -151 4 44 -55 54 35 15 1 13 20 215 -23 -151 13 10 -56 25 54 -150 55 43 -55 22 36 -151 24 12 -57 9 20 -150 41 51 -54 35 56 -155 15 54 -57 36 16 15 2 18 23 218 -25 -155 25 2 -58 5 14 -155 6 20 -57 6 50 -155 37 17 -58 45 35 -154 51 57 -56 24 8 -159 27 33 -58 57 37 15 3 23 25 221 -27 -159 37 57 -59 24 52 -159 16 49 -58 29 59 -159 52 11 -60 2 57 -159 0 59 -57 50 5 -163 40 2 -60 2 30 15 4 28 28 224 -29 -163 52 5 -60 28 25 -163 27 44 -59 36 17 -164 8 48 -61 4 42 -163 9 52 -58 58 31 -167 52 49 -60 53 26 15 5 33 30 227 -30 -168 6 45 -61 18 13 -167 38 43 -60 28 24 -168 26 19 -61 53 0 -167 18 25 -59 52 22 -172 4 50 -61 32 9 15 6 37 31 230 -32 -172 20 49 -61 55 57 -171 48 46 -61 8 8 -172 43 25 -62 29 23 -171 25 50 -60 33 38 -176 14 44 -62 0 0 15 7 42 33 233 -33 -176 32 48 -62 22 53 -175 56 39 -61 36 54 -176 58 30 -62 55 3 -175 30 58 -61 3 46 179 38 58 -62 18 1 15 8 47 35 236 -35 179 18 50 -62 40 3 179 59 2 -61 55 49 178 50 7 -63 11 2 -179 32 34 -61 23 57 175 37 45 -62 27 11 15 9 52 36 239 -36 175 15 40 -62 48 23 175 59 43 -62 5 48 174 44 5 -63 18 12 176 30 44 -61 35 9 171 42 58 -62 28 17 15 10 57 38 242 -37 171 19 5 -62 48 41 172 6 41 -62 7 44 170 44 52 -63 17 23 172 40 7 -61 38 14 167 55 49 -62 22 7 15 12 2 39 244 -38 167 30 19 -62 41 44 168 21 6 -62 2 21 166 53 47 -63 9 20 168 56 43 -61 33 59 164 17 13 -62 9 23 15 13 7 41 246 -40 163 50 20 -62 28 14 164 43 52 -61 50 22 163 11 47 -62 54 45 165 21 23 -61 23 6 160 47 52 -61 50 43 15 14 12 42 248 -41 160 19 50 -62 8 50 161 15 40 -61 32 27 159 39 36 -62 34 17 161 54 46 -61 6 14 157 28 12 -61 26 45 15 15 16 43 250 -42 156 59 14 -61 44 9 157 56 56 -61 9 12 156 17 40 -62 8 35 158 37 21 -60 44 1 154 18 25 -60 58 2 15 16 21 44 252 -43 153 48 44 -61 14 45 154 47 53 -60 41 11 153 6 8 -61 38 12 155 29 19 -60 16 58 151 18 33 -60 25 5 15 17 26 45 253 -44 150 48 20 -60 41 8 151 48 32 -60 8 53 150 5 0 -61 3 39 152 30 45 -59 45 37 148 28 26 -59 48 22 15 18 31 46 255 -45 147 57 51 -60 3 47 148 58 47 -59 32 48 147 14 3 -60 25 24 149 41 31 -59 10 26 145 47 47 -59 8 18 15 19 36 47 256 -46 145 17 0 -59 23 7 146 18 21 -58 53 20 144 32 56 -59 43 53 147 1 25 -58 31 49 143 16 15 -58 25 15 15 20 41 48 256 -47 142 45 24 -58 39 30 143 46 54 -58 10 51 142 1 15 -58 59 28 144 30 6 -57 50 8 140 53 24 -57 39 33 15 21 46 49 257 -48 140 22 35 -57 53 16 141 24 2 -57 25 42 139 38 31 -58 12 29 142 7 13 -57 5 45 138 38 46 -56 51 31 15 22 51 50 257 -49 138 8 5 -57 4 44 139 9 17 -56 38 9 137 24 14 -57 23 14 139 52 20 -56 18 55 136 31 52 -56 1 23 15 23 56 51 258 -50 136 1 24 -56 14 7 137 2 12 -55 48 29 135 17 51 -56 31 57 137 45 1 -55 29 56 134 32 14 -55 9 23 15 25 0 52 258 -51 134 2 1 -55 21 41 135 2 19 -54 56 56 133 18 52 -55 38 53 135 44 49 -54 39 0 132 39 23 -54 15 42 15 26 5 52 258 -52 132 9 28 -54 27 35 133 9 10 -54 3 40 131 26 46 -54 44 13 133 51 17 -53 46 20 130 52 50 -53 20 32 15 27 10 53 258 -53 130 23 16 -53 32 2 131 22 19 -53 8 53 129 41 4 -53 48 7 132 3 59 -52 52 6 129 12 11 -52 24 1 15 28 15 54 257 -54 128 42 58 -52 35 9 129 41 19 -52 12 43 128 1 19 -52 50 44 130 22 31 -51 56 27 127 37 1 -51 26 16 15 29 20 54 257 -55 127 8 10 -51 37 4 128 5 46 -51 15 19 126 27 4 -51 52 11 128 46 28 -50 59 31 126 6 56 -50 27 24 15 30 25 55 256 -56 125 38 28 -50 37 54 126 35 18 -50 16 46 124 57 56 -50 52 34 127 15 29 -50 1 25 124 41 34 -49 27 31 15 31 30 55 255 -57 124 13 30 -49 37 43 125 9 34 -49 17 10 123 33 33 -49 51 59 125 49 12 -49 2 14 123 20 36 -48 26 41 15 32 35 56 254 -58 122 52 56 -48 36 37 123 48 13 -48 16 36 122 13 33 -48 50 31 124 27 19 -48 2 4 122 3 43 -47 24 59 15 33 39 56 253 -59 121 36 27 -47 34 40 122 30 57 -47 15 9 120 57 38 -47 48 13 123 9 32 -47 0 58 120 50 39 -46 22 27 15 34 44 56 252 -60 120 23 46 -46 31 55 121 17 30 -46 12 51 119 45 31 -46 45 8 121 55 33 -45 59 0 119 41 8 -45 19 9 15 35 49 57 251 -61 119 14 38 -45 28 24 120 7 36 -45 9 46 118 36 56 -45 41 20 120 45 8 -44 56 14 118 34 55 -44 15 7 15 36 54 57 250 -62 118 8 47 -44 24 11 119 1 1 -44 5 56 117 31 38 -44 36 49 119 38 3 -43 52 40 117 31 48 -43 10 23 15 37 59 57 248 -62 117 6 2 -43 19 15 117 57 33 -43 1 22 116 29 24 -43 31 39 118 34 4 -42 48 22 116 31 34 -42 4 57 15 39 4 57 247 -63 116 6 9 -42 13 40 116 56 58 -41 56 7 115 30 2 -42 25 49 117 33 1 -41 43 21 115 34 3 -40 58 51 15 40 9 57 246 -64 115 8 58 -41 7 25 115 59 7 -40 50 10 114 33 20 -41 19 21 116 34 42 -40 37 37 114 39 5 -39 52 6 15 41 14 57 244 -65 114 14 20 -40 0 31 115 3 49 -39 43 33 113 39 10 -40 12 16 115 38 57 -39 31 12 113 46 30 -38 44 42 15 42 19 57 243 -66 113 22 4 -38 52 59 114 10 56 -38 36 16 112 47 22 -39 4 34 114 45 37 -38 24 6 112 56 11 -37 36 38 15 43 23 57 241 -66 112 32 3 -37 44 49 113 20 19 -37 28 19 111 57 47 -37 56 14 113 54 35 -37 16 19 112 7 59 -36 27 54 15 44 28 57 240 -67 111 44 9 -36 35 59 112 31 50 -36 19 42 111 10 18 -36 47 16 113 5 43 -36 7 51 111 21 49 -35 18 31 15 45 33 56 238 -68 110 58 15 -35 26 31 111 45 24 -35 10 24 110 24 48 -35 37 39 112 18 54 -34 58 40 110 37 34 -34 8 27 15 46 38 56 237 -68 110 14 16 -34 16 21 111 0 53 -34 0 24 109 41 11 -34 27 24 111 34 1 -33 48 47 109 55 9 -32 57 40 15 47 43 56 235 -69 109 32 5 -33 5 31 110 18 13 -32 49 42 108 59 22 -33 16 27 110 51 0 -32 38 10 109 14 27 -31 46 10 15 48 48 55 234 -70 108 51 38 -31 53 58 109 37 18 -31 38 15 108 19 16 -32 4 49 110 9 46 -31 26 49 108 35 26 -30 33 55 15 49 53 55 232 -70 108 12 50 -30 41 40 108 58 3 -30 26 3 107 40 47 -30 52 27 109 30 13 -30 14 40 107 58 1 -29 20 53 15 50 58 54 231 -71 107 35 38 -29 28 35 108 20 26 -29 13 3 107 3 53 -29 39 20 108 52 18 -29 1 43 107 22 9 -28 7 1 15 52 2 54 229 -71 106 59 57 -28 14 43 107 44 22 -27 59 13 106 28 29 -28 25 25 108 15 58 -27 47 54 106 47 46 -26 52 18 15 53 7 53 228 -72 106 25 45 -26 59 59 107 9 49 -26 44 30 105 54 33 -27 10 40 107 41 10 -26 33 13 106 14 50 -25 36 40 15 54 12 53 227 -72 105 53 0 -25 44 21 106 36 43 -25 28 52 105 22 2 -25 55 2 107 7 51 -25 17 35 105 43 19 -24 20 5 15 55 17 52 225 -72 105 21 38 -24 27 46 106 5 3 -24 12 16 104 50 53 -24 38 28 106 35 58 -24 0 58 105 13 12 -23 2 28 15 56 22 51 224 -73 104 51 38 -23 10 11 105 34 47 -22 54 38 104 21 6 -23 20 55 106 5 31 -22 43 17 104 44 26 -21 43 46 15 57 27 50 223 -73 104 23 0 -21 51 31 105 5 54 -21 35 54 103 52 38 -22 2 18 105 36 28 -21 24 29 104 17 1 -20 23 54 15 58 32 49 222 -73 103 55 42 -20 31 42 104 38 23 -20 15 58 103 25 30 -20 42 33 105 8 48 -20 4 30 103 50 57 -19 2 47 15 59 37 48 221 -73 103 29 43 -19 10 39 104 12 13 -18 54 48 102 59 39 -19 21 35 104 42 31 -18 43 13 103 26 13 -17 40 20 16 0 42 48 220 -73 103 5 4 -17 48 16 103 47 26 -17 32 15 102 35 7 -17 59 19 104 17 38 -17 20 33 103 2 52 -16 16 25 16 1 46 47 219 -73 102 41 46 -16 24 27 103 24 1 -16 8 15 102 11 55 -16 35 38 103 54 9 -15 56 23 102 40 53 -14 50 56 16 2 51 45 218 -72 102 19 50 -14 59 6 103 2 0 -14 42 39 101 50 2 -15 10 26 103 32 5 -14 30 37 102 20 19 -13 23 45 16 3 56 44 217 -72 101 59 17 -13 32 2 102 41 25 -13 15 19 101 29 32 -13 43 34 103 11 30 -13 3 4 102 1 13 -11 54 41 16 5 1 43 216 -72 101 40 11 -12 3 9 102 22 20 -11 46 5 101 10 26 -12 14 53 102 52 26 -11 33 36 101 43 39 -10 23 35 16 6 6 42 215 -71 101 22 35 -10 32 13 102 4 48 -10 14 47 100 52 47 -10 44 14 102 34 57 -10 2 0 101 27 41 - 8 50 12 16 7 11 41 214 -71 101 6 34 - 8 59 4 101 48 54 - 8 41 10 100 36 42 - 9 11 22 102 19 9 - 8 28 4 101 13 26 - 7 14 18 16 8 16 39 213 -70 100 52 13 - 7 23 26 101 34 44 - 7 5 1 100 22 15 - 7 36 5 102 5 9 - 6 51 31 101 1 1 - 5 35 36 16 9 21 38 213 -69 100 39 41 - 5 45 1 101 22 28 - 5 26 0 100 9 33 - 5 58 5 101 53 5 - 5 12 2 100 50 38 - 3 53 43 16 10 25 37 212 -68 100 29 7 - 4 3 30 101 12 15 - 3 43 45 99 58 45 - 4 17 3 101 43 8 - 3 29 15 100 42 28 - 2 8 14 16 11 30 35 212 -67 100 20 44 - 2 18 26 101 4 19 - 1 57 50 99 50 5 - 2 32 33 101 35 34 - 1 42 41 100 36 50 - 0 18 37 16 12 35 33 211 -66 100 14 49 - 0 29 18 100 58 59 - 0 7 41 99 43 47 - 0 44 6 101 30 41 0 8 14 100 34 5 1 35 51 16 13 40 32 211 -65 100 11 42 1 24 34 100 56 37 1 47 24 99 40 11 1 8 57 101 28 54 2 4 15 100 34 43 3 36 2 16 14 45 30 210 -64 100 11 52 3 24 0 100 57 45 3 48 22 99 39 43 3 7 24 101 30 47 4 6 22 100 39 28 5 43 8 16 15 50 28 210 -62 100 16 0 5 30 11 101 3 8 5 56 26 99 43 2 5 12 19 101 37 10 6 15 55 100 49 18 7 58 50 16 16 55 26 209 -60 100 25 1 7 44 40 101 13 50 8 13 23 99 50 59 7 25 13 101 49 11 8 34 47 101 5 45 10 25 33 16 18 0 23 209 -59 100 40 21 10 9 47 101 31 29 10 41 49 100 4 51 9 48 11 102 8 40 11 5 50 101 31 19 13 7 12 16 19 5 20 209 -57 101 4 18 12 49 8 101 58 48 13 25 56 100 26 41 12 24 33 102 38 43 13 53 47 102 10 31 16 10 42 16 20 9 17 209 -54 101 40 56 15 49 3 102 40 50 16 33 22 101 0 3 15 19 51 103 25 18 17 7 31 103 13 24 19 50 53 16 21 14 14 209 -51 102 38 59 19 22 31 103 49 16 20 21 13 101 52 11 18 45 5 104 43 13 21 8 21 105 14 8 24 56 40 16 22 19 8 210 -47 104 25 16 24 8 24 106 9 26 25 53 38 103 23 5 23 9 36 107 49 34 27 43 34 Uncertainty in time = +/- 22 secs [Prediction of 2008 Jul 3.0] Data for the target star ------------------------ * name: 2UCAC 12291698 * constellation : Ara * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 19 24.3257 DE: -45 56 55.486 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .031, .030 ) * V mag [mag]: 12.3 * B mag [mag]: 0.0 * Apparent position with proper motion RA(deg): 260.0191835693 DE(deg): -45.9612179850 * Equation of equinoxes (radians) : 0.000054869952913 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (599) Luisa approx. diameter [km]: 65 approx. diameter ["]: .065 distance from Earth [AU]: 1.38900 * orbital information: orbit source: Preston date of fit: 2008 Jul 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 876 number of rejected observations: 57 time covered by the observations: 1906 Apr 29 - 2008 Jun 16 1 sigma uncertainty ellipse (major, minor, PA): 0.035, 0.019, 116° remarks: * orbital elements for (599) Luisa : Mean anomaly = 331.29540011 deg Arg. of pericenter = 292.80526125 deg Long. of node = 44.67406678 deg Inclination = 16.66322290 deg Eccentricity = 0.29377824 Semimajor axis = 2.77257807 AU Perihelion dist = 1.95805498 AU Mag: H = 8.79, G = 0.15 Epoch of elements : MJD 54683.65400000 TDT (2008 Aug 05.654) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Aug 5 599 Luisa 15h 40.1m UT 12.3 17 19 24.326-45 56 55.492UCAC 12291698 0.0 12.2 65 31.2 1.389 0.096 7.38 70.2531 -45.951 -53.55 16.75 15.6691 0.53595 -0.07017 0.15340 1.16538 0.00419 0.00096 2000 330.5153062008 8 2.00000292.805261 44.674067 16.6632230.29377824 2.7725781 1.9580550 8.7 5.00.15 RATE 2.1349040 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.046 0.035 105 1.71 0.046 0 54650.5020080805_291698 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jul 04, 23:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org