IOTA/IOTA-ES occultation update for (4492) Debussy / UCAC4 303-231762 event on 2024 Oct 16, 09:20 UT Visible from Summary ------- On 2024 Oct 16 UT, the 16.4533044213132 km diameter asteroid (4492) Debussy will occult a 11.3 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 7.45 mag to 18.71 mag (the magnitude of the asteroid) for at most 0.670 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 16, 09:16 - 2024 Oct 16, 09:23 * geocentric midpoint of event [JD]: 2460599.88909029 * magnitude of target star: 11.26 * magnitude drop [mag]: 7.45 * estimated maximum duration [s]: 0.670 * Moon: 98 % sunlit, 92° distance * Sun: 73° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.31 * 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", 83°) * approx speed of asteroid's shadow [km/s]: 24.8858 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 303-231762 by 4492 Debussy on 2024 Oct 16 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 - 7 0 0 -42 8 31 9 16 55.4 1 131 39 -42 16 10 -42 0 53 -42 20 54 -41 56 11 .... - 6 0 0 -42 47 38 9 16 55.5 2 130 40 -42 55 17 -42 39 59 -43 0 1 -42 35 17 0.71 - 5 0 0 -43 26 27 9 16 55.7 3 129 40 -43 34 8 -43 18 48 -43 38 52 -43 14 6 0.74 - 4 0 0 -44 4 59 9 16 56.0 4 129 40 -44 12 40 -43 57 19 -44 17 24 -43 52 36 0.75 - 3 0 0 -44 43 11 9 16 56.4 5 128 40 -44 50 52 -44 35 31 -44 55 37 -44 30 48 0.76 - 2 0 0 -45 21 1 9 16 56.9 6 127 41 -45 28 43 -45 13 21 -45 33 28 -45 8 38 0.77 - 1 0 0 -45 58 29 9 16 57.5 7 126 41 -46 6 11 -45 50 49 -46 10 56 -45 46 6 0.77 0 0 0 -46 35 33 9 16 58.2 7 126 41 -46 43 15 -46 27 53 -46 48 0 -46 23 10 0.77 1 0 0 -47 12 12 9 16 58.9 8 125 41 -47 19 53 -47 4 32 -47 24 38 -46 59 49 0.77 2 0 0 -47 48 25 9 16 59.7 9 124 41 -47 56 6 -47 40 44 -48 0 50 -47 36 2 0.78 3 0 0 -48 24 10 9 17 0.5 10 123 41 -48 31 50 -48 16 30 -48 36 35 -48 11 47 0.78 4 0 0 -48 59 26 9 17 1.5 11 123 42 -49 7 7 -48 51 47 -49 11 51 -48 47 5 0.78 5 0 0 -49 34 13 9 17 2.5 12 122 42 -49 41 53 -49 26 35 -49 46 37 -49 21 53 0.78 6 0 0 -50 8 30 9 17 3.5 13 121 42 -50 16 9 -50 0 52 -50 20 53 -49 56 11 0.78 7 0 0 -50 42 16 9 17 4.6 14 120 42 -50 49 54 -50 34 39 -50 54 37 -50 29 58 0.78 8 0 0 -51 15 30 9 17 5.8 14 119 42 -51 23 7 -51 7 54 -51 27 49 -51 3 13 0.78 9 0 0 -51 48 11 9 17 7.0 15 119 42 -51 55 48 -51 40 36 -52 0 29 -51 35 56 0.78 10 0 0 -52 20 19 9 17 8.3 16 118 42 -52 27 55 -52 12 45 -52 32 36 -52 8 6 0.78 11 0 0 -52 51 54 9 17 9.6 17 117 41 -52 59 28 -52 44 21 -53 4 8 -52 39 42 0.78 12 0 0 -53 22 54 9 17 10.9 18 116 41 -53 30 27 -53 15 23 -53 35 6 -53 10 45 0.78 13 0 0 -53 53 20 9 17 12.3 18 115 41 -54 0 52 -53 45 50 -54 5 30 -53 41 13 0.78 14 0 0 -54 23 12 9 17 13.7 19 114 41 -54 30 42 -54 15 43 -54 35 19 -54 11 7 0.78 15 0 0 -54 52 28 9 17 15.2 20 113 41 -54 59 56 -54 45 1 -55 4 33 -54 40 26 0.78 16 0 0 -55 21 9 9 17 16.6 20 112 41 -55 28 36 -55 13 43 -55 33 11 -55 9 9 0.78 17 0 0 -55 49 15 9 17 18.1 21 112 41 -55 56 40 -55 41 51 -56 1 15 -55 37 18 0.78 18 0 0 -56 16 45 9 17 19.6 22 111 41 -56 24 9 -56 9 23 -56 28 42 -56 4 51 0.78 19 0 0 -56 43 41 9 17 21.2 23 110 40 -56 51 2 -56 36 20 -56 55 34 -56 31 49 0.78 20 0 0 -57 10 1 9 17 22.7 23 109 40 -57 17 20 -57 2 42 -57 21 51 -56 58 12 0.78 21 0 0 -57 35 45 9 17 24.3 24 108 40 -57 43 3 -57 28 29 -57 47 33 -57 24 0 0.78 22 0 0 -58 0 55 9 17 25.9 25 107 40 -58 8 11 -57 53 40 -58 12 39 -57 49 13 0.78 23 0 0 -58 25 30 9 17 27.5 25 106 40 -58 32 44 -58 18 17 -58 37 11 -58 13 51 0.78 24 0 0 -58 49 30 9 17 29.1 26 105 39 -58 56 42 -58 42 20 -59 1 8 -58 37 55 0.78 25 0 0 -59 12 56 9 17 30.8 26 104 39 -59 20 6 -59 5 48 -59 24 31 -59 1 24 0.78 26 0 0 -59 35 48 9 17 32.4 27 103 39 -59 42 56 -59 28 42 -59 47 19 -59 24 20 0.78 27 0 0 -59 58 7 9 17 34.1 28 102 39 -60 5 12 -59 51 2 -60 9 34 -59 46 41 0.78 28 0 0 -60 19 52 9 17 35.7 28 101 38 -60 26 55 -60 12 50 -60 31 16 -60 8 30 0.78 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38 -46 2 43 0.80 179 0 0 -45 37 28 9 22 35.1 35 262 -26 -45 45 11 -45 29 46 -45 49 57 -45 25 2 0.80 180 0 0 -44 59 23 9 22 38.2 34 261 -27 -45 7 6 -44 51 41 -45 11 52 -44 46 57 0.80 -179 0 0 -44 20 55 9 22 41.3 34 260 -28 -44 28 37 -44 13 13 -44 33 23 -44 8 29 0.80 -178 0 0 -43 42 5 9 22 44.3 33 259 -29 -43 49 48 -43 34 24 -43 54 33 -43 29 41 0.80 -177 0 0 -43 2 56 9 22 47.3 32 258 -30 -43 10 38 -42 55 15 -43 15 23 -42 50 32 0.80 -176 0 0 -42 23 29 9 22 50.3 31 257 -31 -42 31 10 -42 15 48 -42 35 54 -42 11 5 0.80 -175 0 0 -41 43 44 9 22 53.2 30 256 -32 -41 51 25 -41 36 5 -41 56 9 -41 31 22 0.80 -174 0 0 -41 3 45 9 22 56.0 29 255 -33 -41 11 25 -40 56 6 -41 16 9 -40 51 24 0.80 -173 0 0 -40 23 33 9 22 58.8 28 254 -34 -40 31 11 -40 15 55 -40 35 55 -40 11 13 0.81 -172 0 0 -39 43 8 9 23 1.6 27 253 -35 -39 50 46 -39 35 31 -39 55 29 -39 30 51 0.81 -171 0 0 -39 2 34 9 23 4.2 27 252 -36 -39 10 11 -38 54 58 -39 14 53 -38 50 18 0.81 -170 0 0 -38 21 52 9 23 6.8 26 251 -37 -38 29 27 -38 14 18 -38 34 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2 14 0.84 -157 0 0 -29 34 11 9 23 32.6 12 243 -50 -29 41 24 -29 26 59 -29 45 51 -29 22 33 0.84 -156 0 0 -28 54 43 9 23 33.8 11 242 -50 -29 1 54 -28 47 33 -29 6 19 -28 43 8 0.85 -155 0 0 -28 15 33 9 23 35.0 10 242 -51 -28 22 41 -28 8 25 -28 27 6 -28 4 2 0.85 -154 0 0 -27 36 42 9 23 36.0 9 241 -52 -27 43 48 -27 29 36 -27 48 12 -27 25 14 0.86 -153 0 0 -26 58 12 9 23 36.9 8 241 -53 -27 5 16 -26 51 8 -27 9 38 -26 46 48 0.87 -152 0 0 -26 20 3 9 23 37.7 7 240 -54 -26 27 6 -26 13 2 -26 31 26 -26 8 43 0.89 -151 0 0 -25 42 19 9 23 38.4 6 240 -55 -25 49 19 -25 35 19 -25 53 38 -25 31 2 0.90 -150 0 0 -25 4 58 9 23 38.9 5 239 -55 -25 11 56 -24 58 1 -25 16 14 -24 53 45 0.93 -149 0 0 -24 28 4 9 23 39.4 3 239 -56 -24 34 59 -24 21 9 -24 39 16 -24 16 54 0.98 -148 0 0 -23 51 36 9 23 39.7 2 239 -57 -23 58 29 -23 44 43 -24 2 44 -23 40 29 1.07 -147 0 0 -23 15 36 9 23 39.9 1 238 -58 -23 22 27 -23 8 46 -23 26 41 -23 4 33 1.31 -146 0 0 -22 40 5 9 23 40.0 0 238 -58 -22 46 54 -22 33 17 -22 51 7 -22 29 6 5.33 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 303-231762 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 26 01.4834 DE: -29 32 30.525 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 26 01.4833 DE: -29 32 30.525 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.3 * B mag [mag]: 12.2 * 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]: 2.97400 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", 83.143° remarks: * orbital elements for (4492)Debussy : Mean anomaly = 271.5470237127 deg Arg. of pericenter = 53.8666411476 deg Long. of node = 349.6916105682 deg Inclination = 8.0172330294 deg Eccentricity = 0.1770425418 Semimajor axis = 2.7681417017 AU Perihelion dist = 2.2780628588 AU Mag: H = 13.09, G = 0.15 Epoch of elements : MJD 60599.38908995 TDT (2024 Oct 16.3891) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#822023Apr24,0.67,2024,10,16,9.338167,0.124099,-0.599502,13.752738,2.856334,0.005498,0.000075,0.000000,0.000000 111.4387,-29.5291,36.30,-9.13,False UCAC4 303-231762,18.43374541,-29.5418126,12.16,11.26,10.77,0.1,0,,18.45991452,-29.5290538,7.45,7.49,0,0,0 4492,Debussy,18.71,16.669,2.9740,0,1,3.116,8.45,,1.4,0 ,9.4,31,1.109000,,,,,, 0,271.4638,2024,10,16,53.8666,349.6916,8.0172,0.17704,2.76814,2.27806,13.09,5.0,0.15 1.308,0.0103,0.0022,83,0.0024,Known errors,0.82,0,-1,-1 20241016_231762,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org