IOTA/IOTA-ES occultation update for (1859) Kovalevskaya / UCAC4 283-203568 event on 2023 Jul 01, 16:29 UT Visible from N Australia Summary ------- On 2023 Jul 01 UT, the 46.8 km diameter asteroid (1859) Kovalevskaya will occult a 12.2 mag star in the constellation Sagittarius for observers along a path across N Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.93 mag to 15.06 mag (the magnitude of the asteroid) for at most 4.020 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: 2023 Jul 01, 16:19 - 2023 Jul 01, 16:38 * geocentric midpoint of event [JD]: 2460127.18681050 * magnitude of target star: 12.21 * magnitude drop [mag]: 2.93 * estimated maximum duration [s]: 4.020 * Moon: 96 % sunlit, 25° distance * Sun: 170° distance * rough path description: N Australia The occultation path -------------------- * approximate projected width [km]: 48 * 1 sigma uncertainty interval [path widths]: +/- 0.20 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.033, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.034", 0.004", 82°) * approx speed of asteroid's shadow [km/s]: 11.6438 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 283-203568 by 1859 Kovalevskaya on 2023 Jul 1 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 30 0 0 9 57 40 16 37 57.0 0 124 -4 .. .. .. 9 41 58 .. .. .. 9 35 44 .... 31 0 0 9 17 35 16 37 56.9 1 124 -5 9 33 17 9 1 55 9 39 32 8 55 41 0.02 32 0 0 8 37 36 16 37 56.5 2 124 -6 8 53 16 8 21 57 8 59 30 8 15 44 -0.10 33 0 0 7 57 43 16 37 55.9 4 124 -7 8 13 22 7 42 5 8 19 36 7 35 53 -0.14 34 0 0 7 17 59 16 37 55.0 5 125 -9 7 33 36 7 2 22 7 39 49 6 56 11 -0.16 35 0 0 6 38 24 16 37 53.9 6 125 -10 6 54 0 6 22 49 7 0 12 6 16 38 -0.17 36 0 0 5 58 59 16 37 52.6 7 125 -11 6 14 33 5 43 26 6 20 45 5 37 16 -0.18 37 0 0 5 19 47 16 37 51.0 8 125 -12 5 35 19 5 4 16 5 41 30 4 58 6 -0.19 38 0 0 4 40 48 16 37 49.2 10 125 -13 4 56 18 4 25 18 5 2 28 4 19 9 -0.19 39 0 0 4 2 3 16 37 47.2 11 125 -14 4 17 31 3 46 36 4 23 40 3 40 27 -0.20 40 0 0 3 23 34 16 37 45.0 12 125 -16 3 39 0 3 8 9 3 45 8 3 2 1 -0.20 41 0 0 2 45 21 16 37 42.5 13 125 -17 3 0 45 2 29 59 3 6 53 2 23 52 -0.20 42 0 0 2 7 27 16 37 39.8 14 125 -18 2 22 49 1 52 6 2 28 55 1 46 1 -0.20 43 0 0 1 29 51 16 37 36.9 15 125 -19 1 45 11 1 14 33 1 51 17 1 8 29 -0.21 44 0 0 0 52 36 16 37 33.7 17 125 -20 1 7 53 0 37 20 1 13 58 0 31 16 -0.21 45 0 0 0 15 41 16 37 30.4 18 125 -21 0 30 56 0 0 28 0 36 59 - 0 5 35 -0.21 46 0 0 - 0 20 51 16 37 26.8 19 125 -22 - 0 5 40 - 0 36 2 0 0 23 - 0 42 4 -0.21 47 0 0 - 0 57 1 16 37 23.1 20 125 -24 - 0 41 52 - 1 12 10 - 0 35 51 - 1 18 10 -0.21 48 0 0 - 1 32 48 16 37 19.1 21 125 -25 - 1 17 41 - 1 47 53 - 1 11 41 - 1 53 53 -0.21 49 0 0 - 2 8 10 16 37 15.0 22 125 -26 - 1 53 6 - 2 23 13 - 1 47 7 - 2 29 11 -0.21 50 0 0 - 2 43 7 16 37 10.7 23 125 -27 - 2 28 6 - 2 58 7 - 2 22 7 - 3 4 4 -0.21 51 0 0 - 3 17 38 16 37 6.1 25 125 -28 - 3 2 39 - 3 32 35 - 2 56 42 - 3 38 31 -0.21 52 0 0 - 3 51 42 16 37 1.5 26 125 -29 - 3 36 47 - 4 6 37 - 3 30 50 - 4 12 32 -0.21 53 0 0 - 4 25 19 16 36 56.6 27 125 -30 - 4 10 27 - 4 40 11 - 4 4 31 - 4 46 5 -0.21 54 0 0 - 4 58 28 16 36 51.6 28 125 -32 - 4 43 39 - 5 13 17 - 4 37 45 - 5 19 10 -0.21 55 0 0 - 5 31 9 16 36 46.4 29 125 -33 - 5 16 22 - 5 45 55 - 5 10 30 - 5 51 47 -0.21 56 0 0 - 6 3 21 16 36 41.0 30 125 -34 - 5 48 37 - 6 18 4 - 5 42 46 - 6 23 55 -0.21 57 0 0 - 6 35 4 16 36 35.5 31 125 -35 - 6 20 23 - 6 49 44 - 6 14 32 - 6 55 34 -0.21 58 0 0 - 7 6 17 16 36 29.8 32 125 -36 - 6 51 38 - 7 20 54 - 6 45 49 - 7 26 42 -0.21 59 0 0 - 7 36 59 16 36 24.0 33 125 -37 - 7 22 24 - 7 51 33 - 7 16 36 - 7 57 21 -0.21 60 0 0 - 8 7 11 16 36 18.1 35 125 -38 - 7 52 38 - 8 21 42 - 7 46 51 - 8 27 28 -0.21 61 0 0 - 8 36 52 16 36 12.0 36 125 -39 - 8 22 22 - 8 51 20 - 8 16 36 - 8 57 5 -0.21 62 0 0 - 9 6 1 16 36 5.8 37 125 -40 - 8 51 34 - 9 20 27 - 8 45 50 - 9 26 11 -0.21 63 0 0 - 9 34 39 16 35 59.5 38 125 -41 - 9 20 15 - 9 49 2 - 9 14 32 - 9 54 44 -0.21 64 0 0 -10 2 45 16 35 53.1 39 125 -42 - 9 48 24 -10 17 5 - 9 42 42 -10 22 47 -0.21 65 0 0 -10 30 19 16 35 46.5 40 125 -43 -10 16 1 -10 44 36 -10 10 20 -10 50 17 -0.21 66 0 0 -10 57 21 16 35 39.8 41 125 -44 -10 43 6 -11 11 35 -10 37 25 -11 17 14 -0.21 67 0 0 -11 23 50 16 35 33.1 42 125 -46 -11 9 38 -11 38 2 -11 3 59 -11 43 40 -0.21 68 0 0 -11 49 47 16 35 26.2 43 125 -47 -11 35 37 -12 3 55 -11 29 59 -12 9 33 -0.21 69 0 0 -12 15 11 16 35 19.2 44 125 -48 -12 1 4 -12 29 17 -11 55 27 -12 34 53 -0.21 70 0 0 -12 40 2 16 35 12.2 45 125 -49 -12 25 57 -12 54 5 -12 20 22 -12 59 40 -0.21 71 0 0 -13 4 20 16 35 5.0 46 125 -50 -12 50 18 -13 18 20 -12 44 44 -13 23 54 -0.21 72 0 0 -13 28 5 16 34 57.8 47 125 -51 -13 14 6 -13 42 3 -13 8 32 -13 47 36 -0.21 73 0 0 -13 51 17 16 34 50.5 48 125 -52 -13 37 21 -14 5 12 -13 31 48 -14 10 44 -0.21 74 0 0 -14 13 56 16 34 43.1 49 125 -53 -14 0 2 -14 27 49 -13 54 31 -14 33 20 -0.21 75 0 0 -14 36 2 16 34 35.6 50 125 -54 -14 22 11 -14 49 52 -14 16 40 -14 55 22 -0.21 76 0 0 -14 57 35 16 34 28.0 51 125 -55 -14 43 46 -15 11 23 -14 38 16 -15 16 51 -0.21 77 0 0 -15 18 34 16 34 20.4 52 125 -56 -15 4 48 -15 32 20 -14 59 20 -15 37 48 -0.21 78 0 0 -15 39 1 16 34 12.8 53 125 -57 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56 56 16 25 50.7 66 230 -68 -19 43 44 -20 10 8 -19 38 29 -20 15 22 -0.21 139 0 0 -19 45 24 16 25 42.4 66 231 -67 -19 32 10 -19 58 37 -19 26 55 -20 3 52 -0.21 140 0 0 -19 33 20 16 25 34.2 65 232 -66 -19 20 5 -19 46 35 -19 14 49 -19 51 51 -0.21 141 0 0 -19 20 45 16 25 25.9 64 232 -65 -19 7 28 -19 34 1 -19 2 11 -19 39 17 -0.21 142 0 0 -19 7 37 16 25 17.7 63 233 -64 -18 54 18 -19 20 55 -18 49 1 -19 26 12 -0.21 143 0 0 -18 53 57 16 25 9.6 62 233 -63 -18 40 37 -19 7 17 -18 35 19 -19 12 34 -0.21 144 0 0 -18 39 45 16 25 1.5 61 233 -62 -18 26 23 -18 53 6 -18 21 4 -18 58 24 -0.21 145 0 0 -18 25 0 16 24 53.4 60 234 -61 -18 11 36 -18 38 23 -18 6 17 -18 43 42 -0.21 146 0 0 -18 9 43 16 24 45.3 59 234 -60 -17 56 18 -18 23 8 -17 50 57 -18 28 28 -0.21 147 0 0 -17 53 54 16 24 37.3 59 234 -59 -17 40 26 -18 7 21 -17 35 5 -18 12 41 -0.21 148 0 0 -17 37 31 16 24 29.4 58 234 -58 -17 24 2 -17 51 0 -17 18 40 -17 56 22 -0.21 149 0 0 -17 20 36 16 24 21.5 57 235 -58 -17 7 5 -17 34 8 -17 1 42 -17 39 30 -0.21 150 0 0 -17 3 9 16 24 13.6 56 235 -57 -16 49 35 -17 16 42 -16 44 11 -17 22 5 -0.21 151 0 0 -16 45 8 16 24 5.8 55 235 -56 -16 31 32 -16 58 43 -16 26 8 -17 4 7 -0.21 152 0 0 -16 26 35 16 23 58.0 54 235 -55 -16 12 56 -16 40 12 -16 7 31 -16 45 37 -0.21 153 0 0 -16 7 28 16 23 50.3 53 235 -54 -15 53 48 -16 21 8 -15 48 21 -16 26 33 -0.21 154 0 0 -15 47 48 16 23 42.6 52 235 -53 -15 34 6 -16 1 31 -15 28 38 -16 6 57 -0.21 155 0 0 -15 27 36 16 23 35.1 51 235 -52 -15 13 51 -15 41 20 -15 8 22 -15 46 48 -0.21 156 0 0 -15 6 50 16 23 27.5 50 235 -51 -14 53 2 -15 20 37 -14 47 33 -15 26 5 -0.21 157 0 0 -14 45 31 16 23 20.1 49 235 -50 -14 31 41 -14 59 20 -14 26 11 -15 4 50 -0.21 158 0 0 -14 23 39 16 23 12.7 48 235 -49 -14 9 46 -14 37 31 -14 4 15 -14 43 1 -0.21 159 0 0 -14 1 14 16 23 5.4 47 235 -48 -13 47 18 -14 15 8 -13 41 46 -14 20 39 -0.21 160 0 0 -13 38 15 16 22 58.2 46 235 -47 -13 24 17 -13 52 12 -13 18 44 -13 57 45 -0.21 161 0 0 -13 14 44 16 22 51.0 45 235 -46 -13 0 43 -13 28 43 -12 55 9 -13 34 17 -0.21 162 0 0 -12 50 39 16 22 44.0 44 235 -45 -12 36 36 -13 4 41 -12 31 1 -13 10 16 -0.21 163 0 0 -12 26 1 16 22 37.0 43 235 -44 -12 11 55 -12 40 6 -12 6 19 -12 45 42 -0.22 164 0 0 -12 0 51 16 22 30.1 42 235 -43 -11 46 42 -12 14 58 -11 41 5 -12 20 35 -0.22 165 0 0 -11 35 7 16 22 23.3 41 235 -41 -11 20 56 -11 49 18 -11 15 17 -11 54 55 -0.22 166 0 0 -11 8 51 16 22 16.7 40 235 -40 -10 54 37 -11 23 4 -10 48 57 -11 28 43 -0.22 167 0 0 -10 42 2 16 22 10.1 39 235 -39 -10 27 45 -10 56 18 -10 22 4 -11 1 58 -0.22 168 0 0 -10 14 41 16 22 3.7 38 235 -38 -10 0 21 -10 29 0 - 9 54 39 -10 34 41 -0.22 169 0 0 - 9 46 48 16 21 57.3 37 235 -37 - 9 32 25 -10 1 9 - 9 26 42 -10 6 52 -0.22 170 0 0 - 9 18 22 16 21 51.1 36 235 -36 - 9 3 57 - 9 32 47 - 8 58 12 - 9 38 30 -0.22 171 0 0 - 8 49 25 16 21 45.0 35 235 -35 - 8 34 56 - 9 3 52 - 8 29 11 - 9 9 37 -0.22 172 0 0 - 8 19 56 16 21 39.0 34 235 -34 - 8 5 25 - 8 34 27 - 7 59 38 - 8 40 12 -0.22 173 0 0 - 7 49 56 16 21 33.2 33 235 -33 - 7 35 22 - 8 4 30 - 7 29 34 - 8 10 16 -0.22 174 0 0 - 7 19 25 16 21 27.5 32 235 -32 - 7 4 48 - 7 34 2 - 6 58 59 - 7 39 50 -0.22 175 0 0 - 6 48 24 16 21 22.0 31 235 -31 - 6 33 44 - 7 3 3 - 6 27 54 - 7 8 52 -0.22 176 0 0 - 6 16 53 16 21 16.6 30 235 -30 - 6 2 10 - 6 31 35 - 5 56 19 - 6 37 25 -0.22 177 0 0 - 5 44 52 16 21 11.4 28 235 -29 - 5 30 6 - 5 59 37 - 5 24 14 - 6 5 28 -0.22 178 0 0 - 5 12 22 16 21 6.3 27 235 -27 - 4 57 33 - 5 27 9 - 4 51 39 - 5 33 2 -0.22 179 0 0 - 4 39 23 16 21 1.4 26 235 -26 - 4 24 31 - 4 54 13 - 4 18 36 - 5 0 7 -0.22 180 0 0 - 4 5 56 16 20 56.6 25 235 -25 - 3 51 1 - 4 20 49 - 3 45 5 - 4 26 44 -0.22 -179 0 0 - 3 32 1 16 20 52.0 24 235 -24 - 3 17 4 - 3 46 57 - 3 11 7 - 3 52 53 -0.22 -178 0 0 - 2 57 39 16 20 47.7 23 235 -23 - 2 42 39 - 3 12 38 - 2 36 41 - 3 18 36 -0.22 -177 0 0 - 2 22 51 16 20 43.4 22 235 -22 - 2 7 49 - 2 37 53 - 2 1 49 - 2 43 52 -0.22 -176 0 0 - 1 47 38 16 20 39.4 21 235 -21 - 1 32 32 - 2 2 43 - 1 26 32 - 2 8 42 -0.22 -175 0 0 - 1 12 0 16 20 35.6 19 235 -20 - 0 56 52 - 1 27 7 - 0 50 50 - 1 33 8 -0.22 -174 0 0 - 0 35 58 16 20 32.0 18 235 -18 - 0 20 47 - 0 51 8 - 0 14 44 - 0 57 9 -0.22 -173 0 0 0 0 28 16 20 28.5 17 235 -17 0 15 41 - 0 14 45 0 21 45 - 0 20 47 -0.22 -172 0 0 0 37 15 16 20 25.3 16 235 -16 0 52 32 0 22 0 0 58 36 0 15 57 -0.22 -171 0 0 1 14 24 16 20 22.3 15 235 -15 1 29 43 0 59 7 1 35 48 0 53 3 -0.22 -170 0 0 1 51 54 16 20 19.5 14 235 -14 2 7 15 1 36 34 2 13 21 1 30 29 -0.22 -169 0 0 2 29 43 16 20 17.0 12 235 -13 2 45 6 2 14 21 2 51 13 2 8 14 -0.22 -168 0 0 3 7 50 16 20 14.6 11 235 -12 3 23 16 2 52 26 3 29 24 2 46 18 -0.22 -167 0 0 3 46 15 16 20 12.5 10 235 -10 4 1 42 3 30 48 4 7 51 3 24 40 -0.22 -166 0 0 4 24 55 16 20 10.6 9 235 -9 4 40 25 4 9 26 4 46 35 4 3 18 -0.22 -165 0 0 5 3 51 16 20 8.9 8 235 -8 5 19 23 4 48 20 5 25 33 4 42 11 -0.22 -164 0 0 5 43 0 16 20 7.5 7 235 -7 5 58 34 5 27 28 6 4 45 5 21 17 -0.22 -163 0 0 6 22 22 16 20 6.3 5 235 -6 6 37 58 6 6 48 6 44 10 6 0 37 -0.22 -162 0 0 7 1 55 16 20 5.3 4 236 -5 7 17 33 6 46 19 7 23 45 6 40 8 -0.22 -161 0 0 7 41 39 16 20 4.6 3 236 -3 7 57 17 7 26 1 8 3 31 7 19 49 -0.21 -160 0 0 8 21 30 16 20 4.1 2 236 -2 8 37 11 8 5 51 8 43 25 7 59 39 -0.20 -159 0 0 9 1 30 16 20 3.9 1 236 -1 9 17 11 8 45 49 9 23 26 8 39 36 -0.15 Uncertainty in time = +/- 4 secs Prediction of 2023 May 14.2 Data for the target star ------------------------ * name: UCAC4 283-203568 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 47 20.7028 DE: -33 26 31.025 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 47 20.7028 DE: -33 26 31.025 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1859) Kovalevskaya asteroid class: approx. diameter [km]: 47 approx. diameter ["]: 0.032 distance from Earth [AU]: 1.99160 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2023 Apr 24 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): 0.034", 0.004", 81.717° remarks: * orbital elements for (1859)Kovalevskaya : Mean anomaly = 42.8933009432 deg Arg. of pericenter = 245.1095915714 deg Long. of node = 343.2582438675 deg Inclination = 7.6985506390 deg Eccentricity = 0.0973358094 Semimajor axis = 3.2103016786 AU Perihelion dist = 2.8978243661 AU Mag: H = 10.85, G = 0.15 Epoch of elements : MJD 60126.68680556 TDT (2023 Jul 01.6868) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,4.02,2023,7,1,16.483452,0.001337,0.200498,-6.571915,0.043883,-0.000143,0.001000,0.000001,0.000000 115.5059,-33.4164,-66.27,23.09,False UCAC4 283-203568,18.78908410,-33.4419512,0.00,12.21,0.00,0.0,0,,18.81506606,-33.4163570,2.92,0.00,0,0,0 1859,Kovalevskaya,15.06,46.8,1.9916,0,0,-2.317,0.20,,2.4,0 0,42.7756,2023,7,1,245.1096,343.2582,7.6986,0.09734,3.21030,2.89782,10.84,5.0,0.15 1.199,0.0337,0.0040,82,0.0064,Known errors,-1.00,-1,-1,-1 20230701_203568,60078.16 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 14, 03:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org