IOTA/IOTA-ES occultation update for (4492) Debussy / UCAC4 302-226561 event on 2024 Oct 13, 22:24 UT Visible from Summary ------- On 2024 Oct 13 UT, the 16.4003279272464 km diameter asteroid (4492) Debussy will occult a 11.6 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.08 mag to 18.70 mag (the magnitude of the asteroid) for at most 0.690 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: 2024 Oct 13, 22:20 - 2024 Oct 13, 22:28 * geocentric midpoint of event [JD]: 2460597.43349620 * magnitude of target star: 11.62 * magnitude drop [mag]: 7.08 * estimated maximum duration [s]: 0.690 * Moon: 82 % sunlit, 56° distance * Sun: 74° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.002", 84°) * approx speed of asteroid's shadow [km/s]: 23.9841 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 302-226561 by 4492 Debussy on 2024 Oct 13 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 -164 0 0 12 36 5 22 20 16.5 1 121 69 12 30 15 12 41 54 12 26 34 12 45 36 .... -163 0 0 12 1 45 22 20 16.6 2 121 69 11 55 57 12 7 33 11 52 16 12 11 14 -0.21 -162 0 0 11 27 50 22 20 16.8 3 121 70 11 22 3 11 33 37 11 18 23 11 37 17 -0.33 -161 0 0 10 54 20 22 20 17.2 4 121 71 10 48 34 11 0 5 10 44 55 11 3 45 -0.37 -160 0 0 10 21 16 22 20 17.6 5 121 71 10 15 32 10 27 0 10 11 53 10 30 39 -0.40 -159 0 0 9 48 39 22 20 18.2 6 122 72 9 42 56 9 54 22 9 39 19 9 58 1 -0.42 -158 0 0 9 16 30 22 20 18.9 7 122 73 9 10 49 9 22 12 9 7 12 9 25 50 -0.43 -157 0 0 8 44 50 22 20 19.7 8 122 73 8 39 9 8 50 31 8 35 33 8 54 7 -0.44 -156 0 0 8 13 39 22 20 20.6 10 122 73 8 8 0 8 19 19 8 4 24 8 22 54 -0.45 -155 0 0 7 42 58 22 20 21.6 11 122 74 7 37 20 7 48 36 7 33 46 7 52 11 -0.45 -154 0 0 7 12 48 22 20 22.7 12 122 74 7 7 11 7 18 25 7 3 37 7 21 59 -0.46 -153 0 0 6 43 9 22 20 23.9 13 123 74 6 37 33 6 48 45 6 34 0 6 52 18 -0.46 -152 0 0 6 14 2 22 20 25.3 14 123 74 6 8 27 6 19 36 6 4 55 6 23 9 -0.46 -151 0 0 5 45 27 22 20 26.7 15 123 74 5 39 54 5 51 1 5 36 23 5 54 33 -0.46 -150 0 0 5 17 26 22 20 28.2 16 123 74 5 11 54 5 22 58 5 8 23 5 26 29 -0.47 -149 0 0 4 49 57 22 20 29.9 17 123 74 4 44 27 4 55 28 4 40 57 4 58 59 -0.47 -148 0 0 4 23 3 22 20 31.6 18 123 74 4 17 33 4 28 33 4 14 4 4 32 3 -0.47 -147 0 0 3 56 43 22 20 33.5 19 123 73 3 51 15 4 2 12 3 47 46 4 5 41 -0.47 -146 0 0 3 30 58 22 20 35.4 20 124 73 3 25 30 3 36 25 3 22 3 3 39 54 -0.47 -145 0 0 3 5 48 22 20 37.4 22 124 72 3 0 21 3 11 14 2 56 54 3 14 42 -0.48 -144 0 0 2 41 13 22 20 39.5 23 124 72 2 35 48 2 46 38 2 32 22 2 50 5 -0.48 -143 0 0 2 17 14 22 20 41.7 24 124 71 2 11 50 2 22 38 2 8 24 2 26 4 -0.48 -142 0 0 1 53 51 22 20 44.0 25 124 71 1 48 28 1 59 14 1 45 3 2 2 40 -0.48 -141 0 0 1 31 4 22 20 46.4 26 124 70 1 25 42 1 36 26 1 22 18 1 39 51 -0.48 -140 0 0 1 8 54 22 20 48.9 27 124 69 1 3 33 1 14 15 1 0 10 1 17 39 -0.48 -139 0 0 0 47 21 22 20 51.4 28 125 68 0 42 1 0 52 41 0 38 38 0 56 4 -0.48 -138 0 0 0 26 25 22 20 54.1 29 125 68 0 21 6 0 31 44 0 17 43 0 35 6 -0.48 -137 0 0 0 6 5 22 20 56.8 30 125 67 0 0 47 0 11 23 - 0 2 34 0 14 46 -0.48 -136 0 0 - 0 13 37 22 20 59.6 31 125 66 - 0 18 54 - 0 8 19 - 0 22 15 - 0 4 58 -0.49 -135 0 0 - 0 32 41 22 21 2.5 32 125 65 - 0 37 57 - 0 27 25 - 0 41 18 - 0 24 4 -0.49 -134 0 0 - 0 51 8 22 21 5.4 33 125 64 - 0 56 23 - 0 45 53 - 0 59 43 - 0 42 32 -0.49 -133 0 0 - 1 8 57 22 21 8.4 34 126 63 - 1 14 11 - 1 3 43 - 1 17 31 - 1 0 23 -0.49 -132 0 0 - 1 26 9 22 21 11.5 35 126 62 - 1 31 22 - 1 20 55 - 1 34 41 - 1 17 36 -0.49 -131 0 0 - 1 42 42 22 21 14.7 36 126 62 - 1 47 55 - 1 37 29 - 1 51 13 - 1 34 10 -0.49 -130 0 0 - 1 58 37 22 21 17.9 37 126 61 - 2 3 49 - 1 53 25 - 2 7 7 - 1 50 7 -0.49 -129 0 0 - 2 13 55 22 21 21.2 38 127 60 - 2 19 6 - 2 8 44 - 2 22 23 - 2 5 26 -0.49 -128 0 0 - 2 28 34 22 21 24.5 39 127 59 - 2 33 45 - 2 23 24 - 2 37 2 - 2 20 6 -0.49 -127 0 0 - 2 42 35 22 21 27.9 40 127 58 - 2 47 45 - 2 37 25 - 2 51 2 - 2 34 9 -0.49 -126 0 0 - 2 55 58 22 21 31.4 41 128 57 - 3 1 7 - 2 50 49 - 3 4 23 - 2 47 33 -0.49 -125 0 0 - 3 8 43 22 21 34.9 42 128 56 - 3 13 51 - 3 3 34 - 3 17 7 - 3 0 18 -0.49 -124 0 0 - 3 20 49 22 21 38.5 43 128 55 - 3 25 57 - 3 15 41 - 3 29 13 - 3 12 26 -0.49 -123 0 0 - 3 32 18 22 21 42.2 43 129 54 - 3 37 25 - 3 27 10 - 3 40 40 - 3 23 55 -0.49 -122 0 0 - 3 43 7 22 21 45.9 44 129 53 - 3 48 14 - 3 38 1 - 3 51 29 - 3 34 46 -0.49 -121 0 0 - 3 53 19 22 21 49.6 45 130 52 - 3 58 25 - 3 48 13 - 4 1 39 - 3 44 58 -0.49 -120 0 0 - 4 2 52 22 21 53.5 46 130 51 - 4 7 58 - 3 57 46 - 4 11 12 - 3 54 32 -0.49 -119 0 0 - 4 11 47 22 21 57.3 47 130 50 - 4 16 52 - 4 6 41 - 4 20 6 - 4 3 27 -0.50 -118 0 0 - 4 20 3 22 22 1.2 48 131 49 - 4 25 8 - 4 14 58 - 4 28 21 - 4 11 45 -0.50 -117 0 0 - 4 27 41 22 22 5.2 49 132 48 - 4 32 46 - 4 22 37 - 4 35 59 - 4 19 23 -0.50 -116 0 0 - 4 34 41 22 22 9.2 49 132 47 - 4 39 45 - 4 29 37 - 4 42 58 - 4 26 23 -0.50 -115 0 0 - 4 41 2 22 22 13.2 50 133 46 - 4 46 6 - 4 35 58 - 4 49 19 - 4 32 45 -0.50 -114 0 0 - 4 46 45 22 22 17.3 51 133 45 - 4 51 49 - 4 41 42 - 4 55 1 - 4 38 29 -0.50 -113 0 0 - 4 51 50 22 22 21.5 52 134 44 - 4 56 53 - 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0 41 13 - 0 55 6 - 0 37 52 -0.50 - 76 0 0 - 0 27 44 22 25 13.0 60 192 6 - 0 33 1 - 0 22 27 - 0 36 22 - 0 19 5 -0.50 - 75 0 0 - 0 8 20 22 25 17.8 59 194 5 - 0 13 38 - 0 3 2 - 0 17 0 0 0 20 -0.50 - 74 0 0 0 11 42 22 25 22.5 59 196 4 0 6 23 0 17 1 0 3 1 0 20 24 -0.50 - 73 0 0 0 32 22 22 25 27.3 58 197 3 0 27 2 0 37 42 0 23 39 0 41 6 -0.50 - 72 0 0 0 53 41 22 25 32.1 58 198 2 0 48 20 0 59 2 0 44 56 1 2 26 -0.50 - 71 0 0 1 15 37 22 25 36.8 57 200 1 1 10 15 1 20 59 1 6 51 1 24 24 -0.50 - 70 0 0 1 38 11 22 25 41.5 56 201 0 1 32 48 1 43 34 1 29 23 1 47 0 -0.50 - 69 0 0 2 1 23 22 25 46.2 56 202 -1 1 55 59 2 6 47 1 52 33 2 10 13 -0.50 - 68 0 0 2 25 12 22 25 50.8 55 203 -2 2 19 46 2 30 37 2 16 20 2 34 4 -0.50 - 67 0 0 2 49 38 22 25 55.5 54 205 -3 2 44 11 2 55 4 2 40 44 2 58 32 -0.50 - 66 0 0 3 14 40 22 26 0.0 53 206 -4 3 9 13 3 20 8 3 5 45 3 23 36 -0.50 - 65 0 0 3 40 19 22 26 4.6 52 207 -5 3 34 50 3 45 48 3 31 22 3 49 17 -0.50 - 64 0 0 4 6 34 22 26 9.1 51 208 -7 4 1 4 4 12 5 3 57 35 4 15 34 -0.50 - 63 0 0 4 33 25 22 26 13.6 51 208 -8 4 27 54 4 38 57 4 24 24 4 42 27 -0.50 - 62 0 0 5 0 51 22 26 18.0 50 209 -9 4 55 19 5 6 24 4 51 48 5 9 56 -0.50 - 61 0 0 5 28 53 22 26 22.4 49 210 -10 5 23 19 5 34 26 5 19 47 5 37 59 -0.50 - 60 0 0 5 57 28 22 26 26.7 48 211 -11 5 51 53 6 3 3 5 48 21 6 6 36 -0.50 - 59 0 0 6 26 37 22 26 31.0 47 212 -12 6 21 1 6 32 14 6 17 28 6 35 48 -0.50 - 58 0 0 6 56 20 22 26 35.3 46 213 -13 6 50 43 7 1 58 6 47 9 7 5 33 -0.50 - 57 0 0 7 26 36 22 26 39.4 45 213 -14 7 20 57 7 32 15 7 17 22 7 35 50 -0.50 - 56 0 0 7 57 24 22 26 43.6 44 214 -15 7 51 44 8 3 4 7 48 8 8 6 40 -0.50 - 55 0 0 8 28 43 22 26 47.6 43 215 -16 8 23 2 8 34 24 8 19 25 8 38 1 -0.50 - 54 0 0 9 0 33 22 26 51.6 42 215 -17 8 54 50 9 6 16 8 51 13 9 9 54 -0.50 - 53 0 0 9 32 53 22 26 55.5 41 216 -18 9 27 9 9 38 37 9 23 31 9 42 16 -0.50 - 52 0 0 10 5 43 22 26 59.3 40 216 -19 9 59 57 10 11 28 9 56 18 10 15 7 -0.50 - 51 0 0 10 39 0 22 27 3.1 39 217 -20 10 33 14 10 44 47 10 29 34 10 48 27 -0.50 - 50 0 0 11 12 46 22 27 6.8 38 218 -21 11 6 58 11 18 34 11 3 18 11 22 15 -0.50 - 49 0 0 11 46 58 22 27 10.4 37 218 -22 11 41 9 11 52 48 11 37 28 11 56 29 -0.50 - 48 0 0 12 21 36 22 27 13.9 36 219 -23 12 15 46 12 27 27 12 12 4 12 31 10 -0.50 - 47 0 0 12 56 39 22 27 17.4 35 219 -24 12 50 48 13 2 31 12 47 5 13 6 14 -0.50 - 46 0 0 13 32 6 22 27 20.7 34 220 -25 13 26 13 13 37 59 13 22 30 13 41 43 -0.50 - 45 0 0 14 7 55 22 27 24.0 33 220 -26 14 2 1 14 13 49 13 58 17 14 17 34 -0.50 - 44 0 0 14 44 6 22 27 27.1 31 221 -27 14 38 11 14 50 2 14 34 26 14 53 47 -0.50 - 43 0 0 15 20 38 22 27 30.2 30 221 -28 15 14 42 15 26 34 15 10 56 15 30 21 -0.50 - 42 0 0 15 57 29 22 27 33.1 29 222 -29 15 51 31 16 3 26 15 47 45 16 7 13 -0.50 - 41 0 0 16 34 37 22 27 36.0 28 222 -30 16 28 39 16 40 36 16 24 52 16 44 24 -0.49 - 40 0 0 17 12 3 22 27 38.8 27 222 -31 17 6 4 17 18 3 17 2 16 17 21 52 -0.49 - 39 0 0 17 49 44 22 27 41.4 26 223 -32 17 43 44 17 55 45 17 39 55 17 59 35 -0.49 - 38 0 0 18 27 40 22 27 44.0 25 223 -33 18 21 38 18 33 42 18 17 49 18 37 32 -0.49 - 37 0 0 19 5 48 22 27 46.4 24 224 -34 18 59 46 19 11 51 18 55 56 19 15 42 -0.49 - 36 0 0 19 44 8 22 27 48.7 23 224 -35 19 38 5 19 50 12 19 34 14 19 54 3 -0.49 - 35 0 0 20 22 38 22 27 51.0 21 225 -36 20 16 34 20 28 43 20 12 43 20 32 35 -0.49 - 34 0 0 21 1 17 22 27 53.1 20 225 -37 20 55 12 21 7 23 20 51 20 21 11 15 -0.49 - 33 0 0 21 40 3 22 27 55.1 19 226 -38 21 33 57 21 46 10 21 30 5 21 50 3 -0.49 - 32 0 0 22 18 55 22 27 56.9 18 226 -39 22 12 49 22 25 3 22 8 56 22 28 56 -0.50 - 31 0 0 22 57 52 22 27 58.7 17 226 -39 22 51 44 23 4 0 22 47 51 23 7 54 -0.50 - 30 0 0 23 36 52 22 28 0.4 16 227 -40 23 30 43 23 43 0 23 26 50 23 46 55 -0.50 - 29 0 0 24 15 53 22 28 1.9 15 227 -41 24 9 44 24 22 2 24 5 50 24 25 57 -0.50 - 28 0 0 24 54 54 22 28 3.3 14 228 -42 24 48 45 25 1 4 24 44 50 25 4 59 -0.50 - 27 0 0 25 33 54 22 28 4.6 13 228 -43 25 27 44 25 40 4 25 23 49 25 44 0 -0.50 - 26 0 0 26 12 51 22 28 5.8 11 229 -43 26 6 40 26 19 2 26 2 45 26 22 58 -0.50 - 25 0 0 26 51 44 22 28 6.9 10 229 -44 26 45 33 26 57 55 26 41 38 27 1 51 -0.50 - 24 0 0 27 30 31 22 28 7.8 9 230 -45 27 24 20 27 36 43 27 20 24 27 40 39 -0.50 - 23 0 0 28 9 11 22 28 8.7 8 230 -45 28 3 0 28 15 23 27 59 4 28 19 20 -0.50 - 22 0 0 28 47 43 22 28 9.4 7 231 -46 28 41 31 28 53 55 28 37 35 28 57 52 -0.50 - 21 0 0 29 26 5 22 28 10.0 6 231 -47 29 19 53 29 32 17 29 15 57 29 36 14 -0.50 - 20 0 0 30 4 16 22 28 10.6 5 232 -47 29 58 3 30 10 28 29 54 7 30 14 25 -0.50 - 19 0 0 30 42 14 22 28 11.0 4 232 -48 30 36 2 30 48 27 30 32 6 30 52 24 -0.51 - 18 0 0 31 19 59 22 28 11.3 3 233 -48 31 13 46 31 26 11 31 9 50 31 30 8 -0.51 - 17 0 0 31 57 28 22 28 11.5 2 233 -49 31 51 16 32 3 41 31 47 20 32 7 38 -0.52 - 16 0 0 32 34 42 22 28 11.6 1 234 -49 32 28 30 32 40 55 32 24 34 32 44 52 -0.57 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 302-226561 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 23 00.1723 DE: -29 40 41.090 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 23 00.1723 DE: -29 40 41.090 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.6 * B mag [mag]: 12.4 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4492) Debussy asteroid class: asteroid system: multiple bodies approx. diameter [km]: 16 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.94610 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#82 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): 0.010", 0.002", 83.521° remarks: * orbital elements for (4492)Debussy : Mean anomaly = 271.0223477795 deg Arg. of pericenter = 53.8657564557 deg Long. of node = 349.6916952017 deg Inclination = 8.0172247089 deg Eccentricity = 0.1770422977 Semimajor axis = 2.7681485637 AU Perihelion dist = 2.2780691817 AU Mag: H = 13.09, G = 0.15 Epoch of elements : MJD 60596.93349612 TDT (2024 Oct 13.9335) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#822023Apr24,0.69,2024,10,13,22.403909,-0.092640,0.438562,13.247311,2.787043,0.005550,0.000064,0.000000,0.000000 -82.8819,-29.6671,-159.55,-8.22,False UCAC4 302-226561,18.38338123,-29.6780805,12.39,11.62,11.20,0.1,0,,18.40959713,-29.6671221,7.08,7.05,0,0,0 4492,Debussy,18.70,16.614,2.9461,0,1,3.034,8.32,,1.4,0 ,9.4,31,1.109000,,,,,, 0,270.8226,2024,10,13,53.8658,349.6917,8.0172,0.17704,2.76815,2.27807,13.09,5.0,0.15 1.317,0.0103,0.0023,84,0.0025,Known errors,0.63,0,-1,-1 20241013_226561,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org