IOTA/IOTA-ES occultation update for (1859) Kovalevskaya / UCAC4-295-187862 event on 2023 Aug 29, 01:52 UT Visible from E USA, Mexico Summary ------- On 2023 Aug 29 UT, the 46.8 km diameter asteroid (1859) Kovalevskaya will occult a 12.4 mag star in the constellation Sagittarius for observers along a path across E USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.69 mag to 16.08 mag (the magnitude of the asteroid) for at most 8.790 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: 65 * date and approx. time of event: 2023 Aug 29, 01:33 - 2023 Aug 29, 02:09 * geocentric midpoint of event [JD]: 2460185.57773630 * magnitude of target star: 12.43 * magnitude drop [mag]: 3.69 * estimated maximum duration [s]: 8.790 * Moon: 93 % sunlit, 32° distance * Sun: 119° distance * rough path description: E USA, Mexico The occultation path -------------------- * approximate projected width [km]: 53 * 1 sigma uncertainty interval [path widths]: +/- 0.93 * 1 sigma uncertainty interval [seconds]: +/- 7.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.029, +/- 0.016) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.016", 86°) * approx speed of asteroid's shadow [km/s]: 5.3219 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-295-187862 by 1859 Kovalevskaya on 2023 Aug 29 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 ' " Latitude Latitude Latitude Latitude 170 0 0 -23 16 8 1 34 17.6 0 124 55 -23 33 1 -22 59 12 -24 4 20 .. .. .. .... 171 0 0 -23 52 28 1 34 18.0 1 124 54 -24 9 10 -23 35 42 -24 40 10 -23 4 22 -0.20 172 0 0 -24 27 21 1 34 18.9 2 123 53 -24 43 54 -24 10 46 -25 14 36 -23 39 45 -0.33 173 0 0 -25 0 51 1 34 20.2 4 123 52 -25 17 14 -24 44 25 -25 47 38 -24 13 41 -0.38 174 0 0 -25 32 57 1 34 22.0 5 122 51 -25 49 12 -25 16 41 -26 19 20 -24 46 14 -0.40 175 0 0 -26 3 44 1 34 24.3 6 122 50 -26 19 50 -25 47 36 -26 49 42 -25 17 26 -0.42 176 0 0 -26 33 12 1 34 26.9 7 121 49 -26 49 9 -26 17 12 -27 18 46 -25 47 17 -0.43 177 0 0 -27 1 22 1 34 30.0 8 121 49 -27 17 12 -26 45 30 -27 46 34 -26 15 51 -0.44 178 0 0 -27 28 17 1 34 33.4 9 121 48 -27 43 59 -27 12 33 -28 13 8 -26 43 7 -0.45 179 0 0 -27 53 58 1 34 37.2 10 120 47 -28 9 33 -27 38 21 -28 38 29 -27 9 9 -0.46 -180 0 0 -28 18 27 1 34 41.3 11 120 46 -28 33 55 -28 2 57 -29 2 38 -27 33 57 -0.46 -179 0 0 -28 41 44 1 34 45.8 12 119 45 -28 57 6 -28 26 21 -29 25 37 -27 57 34 -0.47 -178 0 0 -29 3 52 1 34 50.6 13 119 44 -29 19 8 -28 48 34 -29 47 27 -28 19 59 -0.47 -177 0 0 -29 24 51 1 34 55.8 14 118 44 -29 40 1 -29 9 39 -30 8 10 -28 41 15 -0.48 -176 0 0 -29 44 43 1 35 1.3 14 118 43 -29 59 47 -29 29 37 -30 27 46 -29 1 23 -0.48 -175 0 0 -30 3 29 1 35 7.0 15 117 42 -30 18 28 -29 48 28 -30 46 18 -29 20 24 -0.48 -174 0 0 -30 21 10 1 35 13.1 16 117 41 -30 36 4 -30 6 14 -31 3 45 -29 38 18 -0.49 -173 0 0 -30 37 47 1 35 19.5 17 116 40 -30 52 37 -30 22 55 -31 20 9 -29 55 8 -0.49 -172 0 0 -30 53 20 1 35 26.1 18 116 40 -31 8 6 -30 38 33 -31 35 30 -30 10 54 -0.49 -171 0 0 -31 7 52 1 35 33.1 19 115 39 -31 22 34 -30 53 8 -31 49 51 -30 25 37 -0.49 -170 0 0 -31 21 22 1 35 40.3 20 115 38 -31 36 0 -31 6 42 -32 3 10 -30 39 17 -0.50 -169 0 0 -31 33 51 1 35 47.8 21 114 37 -31 48 26 -31 19 14 -32 15 30 -30 51 56 -0.50 -168 0 0 -31 45 20 1 35 55.5 22 114 37 -31 59 52 -31 30 47 -32 26 51 -31 3 34 -0.50 -167 0 0 -31 55 50 1 36 3.6 23 113 36 -32 10 19 -31 41 19 -32 37 13 -31 14 12 -0.50 -166 0 0 -32 5 21 1 36 11.8 23 113 35 -32 19 48 -31 50 53 -32 46 37 -31 23 50 -0.51 -165 0 0 -32 13 54 1 36 20.4 24 113 34 -32 28 18 -31 59 27 -32 55 3 -31 32 28 -0.51 -164 0 0 -32 21 28 1 36 29.2 25 112 34 -32 35 51 -32 7 4 -33 2 32 -31 40 8 -0.51 -163 0 0 -32 28 5 1 36 38.3 26 112 33 -32 42 26 -32 13 42 -33 9 5 -31 46 50 -0.51 -162 0 0 -32 33 45 1 36 47.6 27 111 32 -32 48 4 -32 19 23 -33 14 41 -31 52 33 -0.51 -161 0 0 -32 38 27 1 36 57.2 28 111 31 -32 52 46 -32 24 6 -33 19 20 -31 57 18 -0.52 -160 0 0 -32 42 12 1 37 7.0 29 110 31 -32 56 30 -32 27 52 -33 23 4 -32 1 5 -0.52 -159 0 0 -32 45 1 1 37 17.1 29 110 30 -32 59 18 -32 30 41 -33 25 51 -32 3 55 -0.52 -158 0 0 -32 46 52 1 37 27.5 30 110 29 -33 1 10 -32 32 33 -33 27 42 -32 5 47 -0.52 -157 0 0 -32 47 47 1 37 38.1 31 109 28 -33 2 5 -32 33 28 -33 28 37 -32 6 41 -0.52 -156 0 0 -32 47 45 1 37 49.0 32 109 28 -33 2 3 -32 33 25 -33 28 36 -32 6 38 -0.53 -155 0 0 -32 46 45 1 38 0.2 33 108 27 -33 1 4 -32 32 25 -33 27 39 -32 5 36 -0.53 -154 0 0 -32 44 48 1 38 11.6 34 108 26 -32 59 8 -32 30 27 -33 25 45 -32 3 36 -0.53 -153 0 0 -32 41 53 1 38 23.4 34 108 26 -32 56 15 -32 27 30 -33 22 54 -32 0 37 -0.53 -152 0 0 -32 38 0 1 38 35.4 35 107 25 -32 52 23 -32 23 36 -33 19 5 -31 56 39 -0.53 -151 0 0 -32 33 9 1 38 47.7 36 107 24 -32 47 34 -32 18 42 -33 14 19 -31 51 42 -0.53 -150 0 0 -32 27 18 1 39 0.2 37 107 23 -32 41 45 -32 12 49 -33 8 35 -31 45 44 -0.53 -149 0 0 -32 20 27 1 39 13.1 38 106 23 -32 34 57 -32 5 55 -33 1 51 -31 38 45 -0.53 -148 0 0 -32 12 35 1 39 26.3 38 106 22 -32 27 8 -31 58 0 -32 54 8 -31 30 45 -0.54 -147 0 0 -32 3 42 1 39 39.8 39 106 21 -32 18 18 -31 49 4 -32 45 25 -31 21 43 -0.54 -146 0 0 -31 53 47 1 39 53.7 40 106 20 -32 8 27 -31 39 5 -32 35 40 -31 11 37 -0.54 -145 0 0 -31 42 48 1 40 7.8 41 106 20 -31 57 32 -31 28 3 -32 24 52 -31 0 27 -0.54 -144 0 0 -31 30 45 1 40 22.3 42 105 19 -31 45 34 -31 15 55 -32 13 2 -30 48 11 -0.54 -143 0 0 -31 17 37 1 40 37.2 43 105 18 -31 32 30 -31 2 42 -32 0 7 -30 34 48 -0.54 -142 0 0 -31 3 22 1 40 52.4 43 105 17 -31 18 19 -30 48 21 -31 46 6 -30 20 18 -0.54 -141 0 0 -30 47 58 1 41 8.0 44 105 17 -31 3 1 -30 32 52 -31 30 58 -30 4 38 -0.54 -140 0 0 -30 31 24 1 41 23.9 45 105 16 -30 46 34 -30 16 13 -31 14 42 -29 47 47 -0.54 -139 0 0 -30 13 40 1 41 40.3 46 105 15 -30 28 55 -29 58 21 -30 57 15 -29 29 44 -0.54 -138 0 0 -29 54 42 1 41 57.0 47 105 14 -30 10 4 -29 39 16 -30 38 37 -29 10 26 -0.55 -137 0 0 -29 34 29 1 42 14.2 47 105 14 -29 49 59 -29 18 56 -30 18 44 -28 49 51 -0.55 -136 0 0 -29 12 58 1 42 31.8 48 105 13 -29 28 36 -28 57 18 -29 57 36 -28 27 59 -0.55 -135 0 0 -28 50 9 1 42 49.9 49 105 12 -29 5 55 -28 34 20 -29 35 11 -28 4 45 -0.55 -134 0 0 -28 25 58 1 43 8.4 50 106 11 -28 41 53 -28 10 0 -29 11 25 -27 40 8 -0.55 -133 0 0 -28 0 23 1 43 27.4 51 106 11 -28 16 27 -27 44 15 -28 46 16 -27 14 5 -0.55 -132 0 0 -27 33 21 1 43 46.9 52 106 10 -27 49 35 -27 17 3 -28 19 43 -26 46 34 -0.55 -131 0 0 -27 4 49 1 44 6.9 52 107 9 -27 21 14 -26 48 21 -27 51 41 -26 17 32 -0.55 -130 0 0 -26 34 45 1 44 27.4 53 107 8 -26 51 22 -26 18 6 -27 22 9 -25 46 55 -0.55 -129 0 0 -26 3 5 1 44 48.5 54 108 7 -26 19 53 -25 46 13 -26 51 3 -25 14 40 -0.55 -128 0 0 -25 29 46 1 45 10.2 55 109 7 -25 46 46 -25 12 41 -26 18 19 -24 40 43 -0.55 -127 0 0 -24 54 43 1 45 32.5 55 109 6 -25 11 57 -24 37 25 -25 43 55 -24 5 1 -0.55 -126 0 0 -24 17 53 1 45 55.3 56 110 5 -24 35 22 -24 0 21 -25 7 45 -23 27 30 -0.55 -125 0 0 -23 39 12 1 46 18.9 57 111 4 -23 56 56 -23 21 24 -24 29 47 -22 48 5 -0.55 -124 0 0 -22 58 35 1 46 43.0 57 112 3 -23 16 35 -22 40 32 -23 49 55 -22 6 41 -0.55 -123 0 0 -22 15 58 1 47 7.9 58 114 2 -22 34 15 -21 57 37 -23 8 6 -21 23 15 -0.54 -122 0 0 -21 31 15 1 47 33.5 59 115 2 -21 49 49 -21 12 36 -22 24 14 -20 37 39 -0.54 -121 0 0 -20 44 21 1 47 59.8 59 116 1 -21 3 14 -20 25 23 -21 38 14 -19 49 49 -0.54 -120 0 0 -19 55 10 1 48 26.9 60 118 0 -20 14 24 -19 35 51 -20 50 0 -18 59 39 -0.54 -119 0 0 -19 3 36 1 48 54.8 60 120 -1 -19 23 11 -18 43 56 -19 59 26 -18 7 3 -0.54 -118 0 0 -18 9 33 1 49 23.5 61 122 -2 -18 29 31 -17 49 30 -19 6 27 -17 11 53 -0.54 -117 0 0 -17 12 53 1 49 53.0 61 124 -3 -17 33 15 -16 52 26 -18 10 56 -16 14 3 -0.54 -116 0 0 -16 13 30 1 50 23.4 62 126 -4 -16 34 18 -15 52 37 -17 12 45 -15 13 25 -0.54 -115 0 0 -15 11 16 1 50 54.7 62 129 -5 -15 32 30 -14 49 55 -16 11 47 -14 9 50 -0.53 -114 0 0 -14 6 2 1 51 26.8 62 131 -6 -14 27 46 -13 44 12 -15 7 55 -13 3 12 -0.53 -113 0 0 -12 57 41 1 52 0.0 62 134 -7 -13 19 55 -12 35 19 -14 1 0 -11 53 20 -0.53 -112 0 0 -11 46 2 1 52 34.0 62 137 -8 -12 8 49 -11 23 8 -12 50 54 -10 40 5 -0.53 -111 0 0 -10 30 58 1 53 9.1 62 140 -9 -10 54 19 -10 7 28 -11 37 27 - 9 23 18 -0.52 -110 0 0 - 9 12 17 1 53 45.0 61 143 -9 - 9 36 15 - 8 48 10 -10 20 31 - 8 2 48 -0.52 -109 0 0 - 7 49 51 1 54 22.0 61 146 -10 - 8 14 29 - 7 25 4 - 8 59 56 - 6 38 25 -0.52 -108 0 0 - 6 23 29 1 54 59.9 60 149 -11 - 6 48 48 - 5 57 59 - 7 35 31 - 5 9 59 -0.52 -107 0 0 - 4 53 0 1 55 38.8 60 152 -12 - 5 19 4 - 4 26 45 - 6 7 9 - 3 37 18 -0.51 -106 0 0 - 3 18 15 1 56 18.5 59 155 -13 - 3 45 7 - 2 51 11 - 4 34 37 - 2 0 11 -0.51 -105 0 0 - 1 39 2 1 56 59.1 58 157 -14 - 2 6 45 - 1 11 7 - 2 57 46 - 0 18 28 -0.51 -104 0 0 0 4 47 1 57 40.6 57 160 -15 - 0 23 49 0 33 38 - 1 16 28 1 28 2 -0.50 -103 0 0 1 53 23 1 58 22.7 55 163 -16 1 23 50 2 23 12 0 29 27 3 19 30 -0.50 -102 0 0 3 46 54 1 59 5.5 54 165 -17 3 16 20 4 17 46 2 20 7 5 16 4 -0.50 -101 0 0 5 45 27 1 59 48.8 52 167 -17 5 13 48 6 17 25 4 15 39 7 17 52 -0.49 -100 0 0 7 49 8 2 0 32.5 50 169 -18 7 16 21 8 22 17 6 16 8 9 25 0 -0.49 - 99 0 0 9 58 1 2 1 16.2 49 171 -19 9 24 0 10 32 25 8 21 37 11 37 33 -0.49 - 98 0 0 12 12 6 2 2 0.0 47 173 -19 11 36 48 12 47 49 10 32 7 13 55 32 -0.48 - 97 0 0 14 31 21 2 2 43.4 44 175 -20 13 54 42 15 8 28 12 47 36 16 18 56 -0.48 - 96 0 0 16 55 40 2 3 26.2 42 176 -20 16 17 35 17 34 17 15 7 57 18 47 39 -0.48 - 95 0 0 19 24 55 2 4 8.2 40 178 -20 18 45 19 20 5 5 17 33 1 21 21 33 -0.48 - 94 0 0 21 58 49 2 4 48.9 37 179 -21 21 17 38 22 40 38 20 2 32 24 0 22 -0.48 - 93 0 0 24 37 3 2 5 28.0 34 180 -21 23 54 12 25 20 36 22 36 12 26 43 48 -0.48 - 92 0 0 27 19 12 2 6 5.2 32 181 -21 26 34 38 28 4 35 25 13 35 29 31 28 -0.48 - 91 0 0 30 4 48 2 6 40.1 29 183 -20 29 18 24 30 52 6 27 54 13 32 22 53 -0.48 - 90 0 0 32 53 15 2 7 12.4 26 184 -20 32 4 58 33 42 35 30 37 31 35 17 32 -0.48 - 89 0 0 35 43 57 2 7 41.8 23 185 -20 34 53 40 36 35 24 33 22 50 38 14 46 -0.48 - 88 0 0 38 36 9 2 8 7.9 20 185 -19 37 43 48 39 29 51 36 9 29 41 13 55 -0.49 - 87 0 0 41 29 6 2 8 30.6 17 186 -18 40 34 35 42 25 9 38 56 41 44 14 16 -0.49 - 86 0 0 44 21 59 2 8 49.8 14 187 -17 43 25 13 45 20 31 41 43 38 47 15 3 -0.50 - 85 0 0 47 13 58 2 9 5.3 11 188 -16 46 14 51 48 15 7 44 29 30 50 15 27 -0.51 - 84 0 0 50 4 9 2 9 17.1 9 189 -15 49 2 38 51 8 3 47 13 26 53 14 37 -0.53 - 83 0 0 52 51 40 2 9 25.3 6 190 -14 51 47 40 53 58 25 49 54 36 56 11 39 -0.56 - 82 0 1 55 35 35 2 9 30.1 3 191 -13 54 29 4 56 45 16 52 32 9 .. .. .. -0.66 - 81 0 1 58 14 58 2 9 31.7 0 191 -12 57 5 55 .. .. .. 55 5 14 .. .. .. -2.97 - 80 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 57 33 5 .. .. .. .... Uncertainty in time = +/- 10 secs Prediction of 2023 Aug 6.7 Data for the target star ------------------------ * name: UCAC4-295-187862 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 18 51.3786 DE: -31 01 27.883 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 18 51.3785 DE: -31 01 27.883 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1859) Kovalevskaya asteroid class: approx. diameter [km]: 47 approx. diameter ["]: 0.027 distance from Earth [AU]: 2.42710 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Jul 30 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): 0.029", 0.016", 85.642° remarks: * orbital elements for (1859)Kovalevskaya : Mean anomaly = 52.9285376299 deg Arg. of pericenter = 245.0838521398 deg Long. of node = 343.2569878842 deg Inclination = 7.6986620550 deg Eccentricity = 0.0972756801 Semimajor axis = 3.2100466149 AU Perihelion dist = 2.8977871472 AU Mag: H = 10.84, G = 0.15 Epoch of elements : MJD 60185.07777778 TDT (2023 Aug 29.0778) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Jul30,8.79,2023,8,29,1.865671,-0.383722,0.268654,1.722131,2.461124,0.004944,0.000542,0.000001,0.000000 -89.9095,-31.0161,152.31,9.49,False UCAC4-295-187862,18.31427185,-31.0244120,0.00,12.43,0.00,0.0,0,,18.33981196,-31.0161163,3.69,0.00,0,0,0 1859,Kovalevskaya,16.08,46.800,2.4271,0,0,0.486,8.91,,2.4,0 0,52.7438,2023,8,28,245.0839,343.2570,7.6987,0.09728,3.21005,2.89779,10.84,5.0,0.15 1.931,0.0293,0.0157,86,0.0333,Known errors,-1.00,0,-1,-1 20230829_187862,60162.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 06, 16:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org