IOTA/IOTA-ES occultation update for (192) Nausikaa / UCAC4 338-199654 event on 2022 Oct 12, 03:43 UT Visible from W Canada, W USA Summary ------- On 2022 Oct 12 UT, the 98.3 km diameter asteroid (192) Nausikaa will occult a 12.4 mag star in the constellation Sagittarius for observers along a path across W Canada, W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.26 mag to 10.97 mag (the magnitude of the asteroid) for at most 7.060 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2022 Oct 12, 03:37 - 2022 Oct 12, 03:49 * geocentric midpoint of event [JD]: 2459864.65519375 * magnitude of target star: 12.39 * magnitude drop [mag]: 0.26 * estimated maximum duration [s]: 7.060 * Moon: 94 % sunlit, 108° distance * Sun: 100° distance * rough path description: W Canada, W USA Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 138 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.029, +/- 0.018) * 1 sigma uncertainty ellipse (major, minor, PA): (0.030", 0.016", 71°) * approx speed of asteroid's shadow [km/s]: 13.9268 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 338-199654 by 192 Nausikaa on 2022 Oct 12 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Longitude Longitude Longitude Longitude .. .. .. 61 0 0 .. .. .... .. .. .. ... .. .. - 94 52 54 ... .. .. - 95 26 57 .... - 94 52 58 60 0 0 3 48 52.3 1 218 -31 - 93 18 18 - 96 27 27 - 92 45 12 - 97 0 25 .... - 96 27 18 59 0 0 3 48 51.9 2 217 -32 - 94 55 36 - 97 58 54 - 94 23 33 - 98 30 52 -0.57 - 97 58 40 58 0 0 3 48 51.3 3 215 -32 - 96 29 39 - 99 27 38 - 95 58 34 - 99 58 41 -0.72 - 99 27 23 57 0 0 3 48 50.3 5 214 -32 - 98 0 50 -100 53 57 - 97 30 38 -101 24 11 -0.79 -100 53 47 56 0 0 3 48 49.0 6 213 -32 - 99 29 30 -102 18 9 - 99 0 5 -102 47 38 -0.83 -102 18 9 55 0 0 3 48 47.3 7 212 -32 -100 55 55 -103 40 30 -100 27 14 -104 9 17 -0.85 -103 40 43 54 0 0 3 48 45.4 9 211 -32 -102 20 23 -105 1 13 -101 52 22 -105 29 22 -0.87 -105 1 42 53 0 0 3 48 43.1 10 209 -32 -103 43 6 -106 20 30 -103 15 42 -106 48 4 -0.88 -106 21 18 52 0 0 3 48 40.5 11 208 -32 -105 4 17 -107 38 33 -104 37 27 -108 5 34 -0.89 -107 39 42 51 0 0 3 48 37.6 12 207 -32 -106 24 9 -108 55 31 -105 57 50 -109 22 3 -0.90 -108 57 4 50 0 0 3 48 34.4 14 206 -31 -107 42 51 -110 11 34 -107 17 0 -110 37 39 -0.91 -110 13 32 49 0 0 3 48 30.8 15 205 -31 -109 0 33 -111 26 51 -108 35 8 -111 52 32 -0.91 -111 29 17 48 0 0 3 48 26.9 16 204 -31 -110 17 24 -112 41 30 -109 52 24 -113 6 48 -0.92 -112 44 24 47 0 0 3 48 22.6 17 203 -31 -111 33 33 -113 55 38 -111 8 54 -114 20 36 -0.92 -113 59 3 46 0 0 3 48 18.0 19 202 -30 -112 49 7 -115 9 23 -112 24 48 -115 34 2 -0.92 -115 13 20 45 0 0 3 48 13.1 20 201 -30 -114 4 14 -116 22 52 -113 40 12 -116 47 14 -0.93 -116 27 22 44 0 0 3 48 7.9 21 200 -29 -115 19 1 -117 36 11 -114 55 15 -118 0 18 -0.93 -117 41 16 43 0 0 3 48 2.3 22 199 -29 -116 33 34 -118 49 26 -116 10 3 -119 13 21 -0.93 -118 55 8 42 0 0 3 47 56.3 24 198 -28 -117 48 1 -120 2 45 -117 24 42 -120 26 29 -0.93 -120 9 5 41 0 0 3 47 50.0 25 197 -27 -119 2 28 -121 16 14 -118 39 20 -121 39 48 -0.94 -121 23 13 40 0 0 3 47 43.3 26 195 -27 -120 17 1 -122 29 59 -119 54 2 -122 53 25 -0.94 -122 37 39 39 0 0 3 47 36.3 27 194 -26 -121 31 48 -123 44 6 -121 8 56 -124 7 26 -0.94 -123 52 29 38 0 0 3 47 28.8 29 193 -25 -122 46 54 -124 58 42 -122 24 8 -125 21 58 -0.94 -125 7 50 37 0 0 3 47 21.1 30 192 -24 -124 2 25 -126 13 54 -123 39 44 -126 37 7 -0.95 -126 23 49 36 0 0 3 47 12.9 31 191 -23 -125 18 30 -127 29 48 -124 55 52 -127 53 1 -0.95 -127 40 32 35 0 0 3 47 4.3 32 189 -23 -126 35 15 -128 46 33 -126 12 38 -129 9 46 -0.95 -128 58 9 34 0 0 3 46 55.4 33 188 -22 -127 52 48 -130 4 16 -127 30 9 -130 27 32 -0.95 -130 16 45 33 0 0 3 46 46.0 34 187 -21 -129 11 15 -131 23 5 -128 48 34 -131 46 26 -0.95 -131 36 32 32 0 0 3 46 36.2 35 185 -19 -130 30 46 -132 43 9 -130 8 1 -133 6 38 -0.96 -132 57 36 31 0 0 3 46 25.9 37 184 -18 -131 51 30 -134 4 39 -131 28 38 -134 28 17 -0.96 -134 20 10 30 0 0 3 46 15.3 38 182 -17 -133 13 35 -135 27 44 -132 50 34 -135 51 34 -0.96 -135 44 23 29 0 0 3 46 4.1 39 180 -16 -134 37 14 -136 52 37 -134 14 2 -137 16 43 -0.96 -137 10 30 28 0 0 3 45 52.5 40 178 -15 -136 2 37 -138 19 32 -135 39 11 -138 43 55 -0.96 -138 38 43 27 0 0 3 45 40.4 41 177 -13 -137 29 58 -139 48 43 -137 6 15 -140 13 28 -0.96 -140 9 18 26 0 0 3 45 27.8 41 175 -12 -138 59 31 -141 20 27 -138 35 28 -141 45 38 -0.97 -141 42 35 25 0 0 3 45 14.6 42 173 -10 -140 31 34 -142 55 6 -140 7 7 -143 20 48 -0.97 -143 18 54 24 0 0 3 45 0.8 43 170 -9 -142 6 27 -144 33 2 -141 41 31 -144 59 20 -0.97 -144 58 42 23 0 0 3 44 46.4 44 168 -7 -143 44 31 -146 14 45 -143 19 2 -146 41 46 -0.97 -146 42 28 22 0 0 3 44 31.3 44 166 -5 -145 26 15 -148 0 48 -145 0 6 -148 28 40 -0.98 -148 30 51 21 0 0 3 44 15.5 45 163 -3 -147 12 12 -149 51 54 -146 45 16 -150 20 48 -0.98 -150 24 36 20 0 0 3 43 58.9 45 160 -2 -149 3 2 -151 48 56 -148 35 10 -152 19 6 -0.98 -152 24 42 19 0 0 3 43 41.4 45 157 1 -150 59 36 -153 53 6 -150 30 36 -154 24 49 -0.98 Latitude Latitude Latitude Latitude -154 0 0 18 14 53 3 43 27.6 45 155 2 17 33 32 18 56 47 17 19 13 19 11 32 -0.99 -155 0 0 17 47 36 3 43 19.0 45 154 3 17 6 30 18 29 14 16 52 17 18 43 54 -0.99 -156 0 0 17 21 12 3 43 10.3 45 152 4 16 40 21 18 2 35 16 26 12 18 17 10 -0.99 -157 0 0 16 55 41 3 43 1.7 45 151 5 16 15 4 17 36 50 16 1 0 17 51 19 -0.99 -158 0 0 16 31 3 3 42 53.2 45 149 6 15 50 39 17 11 58 15 36 40 17 26 22 -0.99 -159 0 0 16 7 18 3 42 44.7 45 148 7 15 27 8 16 47 59 15 13 13 17 2 19 -0.99 -160 0 0 15 44 27 3 42 36.3 45 147 8 15 4 28 16 24 55 14 50 38 16 39 9 -0.99 -161 0 0 15 22 28 3 42 27.9 44 145 10 14 42 42 16 2 44 14 28 56 16 16 54 -0.99 -162 0 0 15 1 23 3 42 19.6 44 144 11 14 21 48 15 41 26 14 8 6 15 55 32 -0.99 -163 0 0 14 41 10 3 42 11.4 44 143 12 14 1 47 15 21 2 13 48 8 15 35 4 -0.99 -164 0 0 14 21 51 3 42 3.3 43 142 13 13 42 38 15 1 32 13 29 3 15 15 30 -0.99 -165 0 0 14 3 25 3 41 55.2 43 141 14 13 24 22 14 42 55 13 10 51 14 56 49 -0.99 -166 0 0 13 45 51 3 41 47.2 43 139 15 13 6 58 14 25 12 12 53 30 14 39 3 -0.99 -167 0 0 13 29 11 3 41 39.3 42 138 16 12 50 27 14 8 22 12 37 2 14 22 9 -0.99 -168 0 0 13 13 23 3 41 31.5 42 137 17 12 34 48 13 52 25 12 21 26 14 6 9 -1.00 -169 0 0 12 58 28 3 41 23.8 41 136 18 12 20 2 13 37 22 12 6 42 13 51 3 -1.00 -170 0 0 12 44 26 3 41 16.2 41 135 19 12 6 7 13 23 12 11 52 50 13 36 50 -1.00 -171 0 0 12 31 16 3 41 8.8 40 134 20 11 53 4 13 9 54 11 39 50 13 23 30 -1.00 -172 0 0 12 18 59 3 41 1.4 40 133 21 11 40 54 12 57 30 11 27 42 13 11 2 -1.00 -173 0 0 12 7 33 3 40 54.1 39 133 22 11 29 35 12 45 58 11 16 25 12 59 28 -1.00 -174 0 0 11 57 0 3 40 46.9 38 132 23 11 19 8 12 35 18 11 6 0 12 48 47 -1.00 -175 0 0 11 47 19 3 40 39.9 38 131 24 11 9 32 12 25 31 10 56 26 12 38 58 -1.00 -176 0 0 11 38 30 3 40 32.9 37 130 25 11 0 47 12 16 37 10 47 44 12 30 1 -1.00 -177 0 0 11 30 32 3 40 26.1 36 129 26 10 52 54 12 8 35 10 39 52 12 21 57 -1.00 -178 0 0 11 23 26 3 40 19.5 36 129 27 10 45 53 12 1 24 10 32 52 12 14 46 -1.00 -179 0 0 11 17 12 3 40 12.9 35 128 28 10 39 42 11 55 6 10 26 42 12 8 26 -1.00 -180 0 0 11 11 48 3 40 6.5 34 127 29 10 34 22 11 49 39 10 21 23 12 2 58 -1.00 179 0 0 11 7 17 3 40 0.2 33 127 30 10 29 53 11 45 5 10 16 55 11 58 22 -1.00 178 0 0 11 3 36 3 39 54.0 33 126 31 10 26 15 11 41 21 10 13 18 11 54 38 -1.00 177 0 0 11 0 46 3 39 48.0 32 125 32 10 23 27 11 38 30 10 10 31 11 51 46 -1.00 176 0 0 10 58 47 3 39 42.1 31 125 33 10 21 30 11 36 29 10 8 34 11 49 45 -1.00 175 0 0 10 57 40 3 39 36.4 30 124 34 10 20 23 11 35 20 10 7 27 11 48 35 -1.00 174 0 0 10 57 22 3 39 30.8 29 124 35 10 20 6 11 35 3 10 7 11 11 48 17 -1.00 173 0 0 10 57 56 3 39 25.3 28 123 36 10 20 40 11 35 36 10 7 45 11 48 50 -1.00 172 0 0 10 59 20 3 39 20.0 28 123 37 10 22 4 11 37 0 10 9 9 11 50 15 -1.00 171 0 0 11 1 34 3 39 14.9 27 122 38 10 24 18 11 39 15 10 11 22 11 52 30 -1.00 170 0 0 11 4 39 3 39 9.9 26 122 39 10 27 21 11 42 21 10 14 26 11 55 36 -1.00 169 0 0 11 8 34 3 39 5.1 25 121 40 10 31 15 11 46 18 10 18 19 11 59 34 -1.00 168 0 0 11 13 20 3 39 0.4 24 121 41 10 35 59 11 51 5 10 23 2 12 4 22 -1.00 167 0 0 11 18 55 3 38 55.9 23 121 41 10 41 32 11 56 43 10 28 35 12 10 0 -1.00 166 0 0 11 25 21 3 38 51.5 22 120 42 10 47 55 12 3 12 10 34 57 12 16 30 -1.00 165 0 0 11 32 37 3 38 47.3 21 120 43 10 55 8 12 10 31 10 42 8 12 23 50 -1.00 164 0 0 11 40 43 3 38 43.3 20 120 44 11 3 10 12 18 40 10 50 9 12 32 1 -1.00 163 0 0 11 49 38 3 38 39.4 19 119 45 11 12 2 12 27 40 10 59 0 12 41 2 -1.00 162 0 0 11 59 24 3 38 35.8 19 119 46 11 21 43 12 37 30 11 8 39 12 50 54 -1.00 161 0 0 12 9 59 3 38 32.3 18 119 47 11 32 13 12 48 10 11 19 8 13 1 36 -1.00 160 0 0 12 21 24 3 38 28.9 17 118 47 11 43 33 12 59 41 11 30 26 13 13 8 -1.00 159 0 0 12 33 39 3 38 25.8 16 118 48 11 55 43 13 12 1 11 42 34 13 25 31 -1.00 158 0 0 12 46 44 3 38 22.8 15 118 49 12 8 41 13 25 12 11 55 30 13 38 44 -1.00 157 0 0 13 0 38 3 38 20.0 14 117 50 12 22 28 13 39 13 12 9 15 13 52 47 -1.00 156 0 0 13 15 21 3 38 17.4 13 117 51 12 37 5 13 54 4 12 23 49 14 7 41 -1.00 155 0 0 13 30 54 3 38 15.0 12 117 51 12 52 31 14 9 44 12 39 13 14 23 24 -1.01 154 0 0 13 47 17 3 38 12.8 11 117 52 13 8 45 14 26 15 12 55 25 14 39 57 -1.01 153 0 0 14 4 28 3 38 10.8 10 116 53 13 25 49 14 43 35 13 12 25 14 57 20 -1.01 152 0 0 14 22 29 3 38 8.9 9 116 53 13 43 41 15 1 44 13 30 14 15 15 33 -1.01 151 0 0 14 41 19 3 38 7.3 8 116 54 14 2 22 15 20 44 13 48 52 15 34 36 -1.02 150 0 0 15 0 58 3 38 5.9 7 115 54 14 21 51 15 40 32 14 8 18 15 54 28 -1.02 149 0 0 15 21 25 3 38 4.6 6 115 55 14 42 9 16 1 10 14 28 33 16 15 9 -1.03 148 0 0 15 42 42 3 38 3.6 5 115 56 15 3 15 16 22 37 14 49 35 16 36 40 -1.04 147 0 0 16 4 47 3 38 2.8 4 115 56 15 25 9 16 44 53 15 11 26 16 59 0 -1.06 146 0 0 16 27 40 3 38 2.2 3 114 57 15 47 51 17 7 58 15 34 4 17 22 9 -1.10 145 0 0 16 51 22 3 38 1.7 2 114 57 16 11 21 17 31 52 15 57 30 17 46 7 -1.19 144 0 0 17 15 51 3 38 1.5 1 114 57 16 35 39 17 56 34 16 21 44 18 10 54 -1.63 Uncertainty in time = +/- 2 secs Prediction of 2022 Aug 20.1 Data for the target star ------------------------ * name: UCAC4 338-199654 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 03 47.1501 DE: -22 34 46.274 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 03 47.1501 DE: -22 34 46.274 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (192) Nausikaa asteroid class: approx. diameter [km]: 98 approx. diameter ["]: 0.092 distance from Earth [AU]: 1.47940 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#118 date of fit: 2022 Aug 01 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.030", 0.016", 71.323° remarks: * orbital elements for (192)Nausikaa : Mean anomaly = 332.7230103055 deg Arg. of pericenter = 30.6482996098 deg Long. of node = 343.1019796009 deg Inclination = 6.7992751027 deg Eccentricity = 0.2459977857 Semimajor axis = 2.4028427493 AU Perihelion dist = 1.8117487537 AU Mag: H = 7.38, G = 0.03 Epoch of elements : MJD 59864.15513889 TDT (2022 Oct 12.1551) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1182022Aug01,7.06,2022,10,12,3.724650,-0.302581,0.633058,7.080915,3.413347,0.004974,0.001085,0.000000,0.000000 -135.2923,-22.5164,120.78,-7.37,False UCAC4 338-199654,20.06309728,-22.5795205,0.00,12.39,0.00,0.0,0,,20.08539682,-22.5164296,0.26,0.00,0,0,0 192,Nausikaa,10.97,98.3,1.4794,0,0,3.038,20.29,,4.8,0 0,332.6820,2022,10,12,30.6483,343.1020,6.7993,0.24600,2.40284,1.81175,7.38,5.0,0.15 1.175,0.0303,0.0157,71,0.0160,Known errors,-1.00,-1,-1,-1 20221012_199654,59811.11 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Aug 20, 02:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org