IOTA/IOTA-ES occultation update for (1248) Jugurtha / TYC 6932-00001-1 event on 2008 Oct 13, 03:49 UT Visible from W Canada, W USA, W Mexico Summary ------- On 2008 Oct 13 UT, the 38 km diameter asteroid (1248) Jugurtha will occult a 11.4 mag star in the constellation Microscopium for observers along a path across W Canada, W USA, W 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 5.4 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: . The event at a glimpse ---------------------- * Rank: 13 * date and approx. time of event: 2008 Oct 13, 03:47 - 2008 Oct 13, 04:02 UT * magnitude of target star: 11.4 * magnitude drop [mag]: 3.3 * estimated maximum duration [s]: 5.4 * Moon: 96 % sunlit, 48° distance * Sun: 111° distance * rough path description: W Canada, W USA, W Mexico The occultation path -------------------- * approximate projected width [km]: 44 * 1 sigma uncertainty interval [path widths]: +/- 5.07 * 1 sigma uncertainty interval [seconds]: +/- 25.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .110 +/- .130) * 1 sigma uncertainty ellipse (major, minor, PA): ( .130", .110", 360° ) * approx speed of asteroid's shadow [km/s]: 7.0339 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6932-00001-1 by 1248 Jugurtha on 2008 Oct 13 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 ' " Longitude Longitude Longitude Longitude - 94 29 17 58 0 0 4 2 39 1 207 -35 - 94 4 39 - 94 53 53 ... .. .. - 99 2 27 - 95 26 13 57 0 0 4 2 38 2 206 -35 - 95 2 19 - 95 50 6 ... .. .. - 99 51 37 - 96 21 12 56 0 0 4 2 38 3 205 -36 - 95 57 58 - 96 44 26 ... .. .. -100 39 24 - 97 14 26 55 0 0 4 2 36 4 205 -36 - 96 51 49 - 97 37 2 ... .. .. -101 25 54 - 98 6 3 54 0 0 4 2 35 5 204 -36 - 97 44 1 - 98 28 5 ... .. .. -102 11 15 - 98 56 14 53 0 0 4 2 33 6 203 -37 - 98 34 44 - 99 17 43 ... .. .. -102 55 35 - 99 45 5 52 0 0 4 2 30 8 203 -37 - 99 24 5 -100 6 5 ... .. .. -103 38 58 -100 32 45 51 0 0 4 2 27 9 202 -37 -100 12 13 -100 53 17 ... .. .. -104 21 31 -101 19 19 50 0 0 4 2 24 10 201 -38 -100 59 14 -101 39 25 - 97 35 23 -105 3 17 -102 4 54 49 0 0 4 2 21 11 201 -38 -101 45 14 -102 24 35 - 98 25 40 -105 44 22 -102 49 35 48 0 0 4 2 17 12 200 -38 -102 30 18 -103 8 53 - 99 14 45 -106 24 49 -103 33 27 47 0 0 4 2 12 13 199 -38 -103 14 31 -103 52 23 -100 2 44 -107 4 43 -104 16 34 46 0 0 4 2 8 14 199 -39 -103 57 59 -104 35 9 -100 49 43 -107 44 6 -104 59 0 45 0 0 4 2 2 15 198 -39 -104 40 44 -105 17 16 -101 35 48 -108 23 1 -105 40 49 44 0 0 4 1 57 16 198 -39 -105 22 52 -105 58 47 -102 21 3 -109 1 33 -106 22 6 43 0 0 4 1 51 18 197 -39 -106 4 25 -106 39 47 -103 5 32 -109 39 43 -107 2 52 42 0 0 4 1 45 19 197 -39 -106 45 27 -107 20 17 -103 49 19 -110 17 34 -107 43 11 41 0 0 4 1 38 20 196 -39 -107 26 2 -108 0 21 -104 32 29 -110 55 9 -108 23 7 40 0 0 4 1 31 21 196 -39 -108 6 11 -108 40 3 -105 15 5 -111 32 30 -109 2 41 39 0 0 4 1 23 22 195 -39 -108 45 59 -109 19 24 -105 57 10 -112 9 40 -109 41 57 38 0 0 4 1 15 23 195 -39 -109 25 27 -109 58 27 -106 38 47 -112 46 39 -110 20 56 37 0 0 4 1 7 24 194 -39 -110 4 38 -110 37 15 -107 20 0 -113 23 32 -110 59 42 36 0 0 4 0 59 25 193 -39 -110 43 35 -111 15 50 -108 0 50 -114 0 18 -111 38 17 35 0 0 4 0 50 26 193 -38 -111 22 20 -111 54 15 -108 41 21 -114 37 2 -112 16 42 34 0 0 4 0 40 27 192 -38 -112 0 55 -112 32 30 -109 21 35 -115 13 43 -112 55 1 33 0 0 4 0 30 29 192 -38 -112 39 22 -113 10 40 -110 1 35 -115 50 25 -113 33 14 32 0 0 4 0 20 30 191 -38 -113 17 44 -113 48 45 -110 41 22 -116 27 9 -114 11 24 31 0 0 4 0 10 31 191 -37 -113 56 2 -114 26 48 -111 21 0 -117 3 57 -114 49 34 30 0 0 3 59 59 32 190 -37 -114 34 18 -115 4 50 -112 0 31 -117 40 50 -115 27 44 29 0 0 3 59 48 33 189 -37 -115 12 36 -115 42 55 -112 39 56 -118 17 51 -116 5 58 28 0 0 3 59 36 34 189 -36 -115 50 55 -116 21 2 -113 19 18 -118 55 1 -116 44 17 27 0 0 3 59 24 35 188 -36 -116 29 19 -116 59 15 -113 58 39 -119 32 23 -117 22 42 26 0 0 3 59 12 36 188 -36 -117 7 49 -117 37 36 -114 38 0 -120 9 57 -118 1 16 25 0 0 3 58 59 37 187 -35 -117 46 28 -118 16 6 -115 17 25 -120 47 47 -118 40 1 24 0 0 3 58 46 38 186 -35 -118 25 16 -118 54 47 -115 56 54 -121 25 53 -119 18 59 23 0 0 3 58 32 39 185 -34 -119 4 17 -119 33 42 -116 36 31 -122 4 18 -119 58 11 22 0 0 3 58 18 40 185 -34 -119 43 33 -120 12 52 -117 16 16 -122 43 4 -120 37 41 21 0 0 3 58 4 41 184 -33 -120 23 4 -120 52 19 -117 56 13 -123 22 12 -121 17 29 20 0 0 3 57 49 42 183 -32 -121 2 54 -121 32 6 -118 36 23 -124 1 46 -121 57 39 19 0 0 3 57 34 43 182 -32 -121 43 5 -122 12 14 -119 16 48 -124 41 46 -122 38 12 18 0 0 3 57 19 44 181 -31 -122 23 39 -122 52 47 -119 57 32 -125 22 16 -123 19 10 17 0 0 3 57 3 45 180 -30 -123 4 37 -123 33 45 -120 38 34 -126 3 19 -124 0 37 16 0 0 3 56 47 46 180 -30 -123 46 3 -124 15 12 -121 19 59 -126 44 55 -124 42 34 15 0 0 3 56 31 47 178 -29 -124 28 0 -124 57 11 -122 1 49 -127 27 9 -125 25 5 14 0 0 3 56 14 48 177 -28 -125 10 28 -125 39 43 -122 44 6 -128 10 3 -126 8 11 13 0 0 3 55 57 49 176 -27 -125 53 33 -126 22 51 -123 26 52 -128 53 40 -126 51 56 12 0 0 3 55 39 50 175 -26 -126 37 15 -127 6 39 -124 10 10 -129 38 3 -127 36 23 11 0 0 3 55 21 51 174 -26 -127 21 39 -127 51 10 -124 54 4 -130 23 15 -128 21 36 10 0 0 3 55 3 52 173 -25 -128 6 47 -128 36 27 -125 38 35 -131 9 21 -129 7 37 9 0 0 3 54 44 53 171 -24 -128 52 43 -129 22 33 -126 23 48 -131 56 24 -129 54 30 8 0 0 3 54 25 54 170 -23 -129 39 31 -130 9 32 -127 9 45 -132 44 28 -130 42 19 7 0 0 3 54 5 55 168 -22 -130 27 14 -130 57 28 -127 56 31 -133 33 38 -131 31 10 6 0 0 3 53 45 55 166 -21 -131 15 57 -131 46 25 -128 44 8 -134 23 59 -132 21 5 5 0 0 3 53 25 56 165 -20 -132 5 44 -132 36 29 -129 32 40 -135 15 37 -133 12 10 4 0 0 3 53 4 57 163 -19 -132 56 40 -133 27 43 -130 22 13 -136 8 36 -134 4 31 3 0 0 3 52 43 57 161 -18 -133 48 51 -134 20 15 -131 12 51 -137 3 4 -134 58 14 2 0 0 3 52 21 58 159 -17 -134 42 22 -135 14 9 -132 4 39 -137 59 8 -135 53 25 1 0 0 3 52 0 59 157 -16 -135 37 21 -136 9 33 -132 57 42 -138 56 56 -136 50 11 0 0 0 3 51 37 59 154 -14 -136 33 53 -137 6 33 -133 52 6 -139 56 37 -137 48 40 - 1 0 0 3 51 14 59 152 -13 -137 32 7 -138 5 18 -134 47 58 -140 58 21 Latitude Latitude Latitude Latitude -139 0 0 - 2 10 42 3 50 47 60 149 -12 - 2 27 8 - 1 54 12 - 5 10 29 0 56 52 -140 0 0 - 3 8 5 3 50 24 60 147 -10 - 3 24 17 - 2 51 49 - 6 5 21 - 0 3 20 -141 0 0 - 4 3 35 3 50 1 60 144 -9 - 4 19 34 - 3 47 34 - 6 58 25 - 1 1 35 -142 0 0 - 4 57 15 3 49 39 60 142 -8 - 5 13 0 - 4 41 27 - 7 49 43 - 1 57 52 -143 0 0 - 5 49 6 3 49 17 60 140 -7 - 6 4 38 - 5 33 30 - 8 39 18 - 2 52 14 -144 0 0 - 6 39 9 3 48 56 60 137 -6 - 6 54 28 - 6 23 46 - 9 27 10 - 3 44 43 -145 0 0 - 7 27 27 3 48 34 60 135 -4 - 7 42 35 - 7 12 16 -10 13 21 - 4 35 21 -146 0 0 - 8 14 1 3 48 13 60 133 -3 - 8 28 58 - 7 59 2 -10 57 54 - 5 24 10 -147 0 0 - 8 58 55 3 47 53 59 131 -2 - 9 13 40 - 8 44 7 -11 40 51 - 6 11 13 -148 0 0 - 9 42 9 3 47 33 59 129 -1 - 9 56 44 - 9 27 31 -12 22 13 - 6 56 31 Uncertainty in time = +/- 29 secs [Prediction of 2008 Oct 1.0] Data for the target star ------------------------ * name: TYC 6932-00001-1 * constellation : Microscopium * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 10 04.5260 DE: -27 39 07.570 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .108, .129 ) * V mag [mag]: 11.4 * B mag [mag]: 12.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1248) Jugurtha approx. diameter [km]: 38 approx. diameter ["]: .024 distance from Earth [AU]: 2.19600 * orbital information: orbit source: Preston date of fit: 2008 Sep 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 848 number of rejected observations: 61 time covered by the observations: 1901 Nov 12 - 2008 Sep 26 1 sigma uncertainty ellipse (major, minor, PA): 0.020, 0.012, 80° remarks: * orbital elements for (1248) Jugurtha : Mean anomaly = 271.28758556 deg Arg. of pericenter = 342.86212149 deg Long. of node = 79.51325821 deg Inclination = 9.14435241 deg Eccentricity = 0.01389749 Semimajor axis = 2.72181467 AU Perihelion dist = 2.68398828 AU Mag: H = 9.79, G = 0.15 Epoch of elements : MJD 54752.15900000 TDT (2008 Oct 13.159) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Oct 13 1248 Jugurtha 3h 49.6m UT 11.4 21 10 4.526-27 39 7.57TYC 6932-00001-1 12.5 14.6 38 5.4 2.196 0.855 11.14 -121.9542 -27.655 119.17 -7.89 3.8259 -0.34786 0.35309 2.83282 2.78158 0.00496 0.00196 2000 270.81370520081011.00000342.862121 79.513258 9.1443520.01389749 2.7218147 2.6839883 9.7 5.00.15 RATE 2.1949080 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.130 0.110 360 6.07 0.121 0 54740.5020081013_0001-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 01, 04:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org