IOTA/IOTA-ES occultation update for (4337) Arecibo / UCAC4 576-038655 event on 2024 Dec 25, 14:05 UT Visible from Summary ------- On 2024 Dec 25 UT, the 19.35 km diameter asteroid (4337) Arecibo will occult a 11.6 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.85 mag to 17.49 mag (the magnitude of the asteroid) for at most 1.400 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 Dec 25, 13:59 - 2024 Dec 25, 14:12 * geocentric midpoint of event [JD]: 2460670.08737775 * magnitude of target star: 11.64 * magnitude drop [mag]: 5.85 * estimated maximum duration [s]: 1.400 * Moon: 27 % sunlit, 105° distance * Sun: 167° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.028, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.028", 0.003", 96°) * approx speed of asteroid's shadow [km/s]: 13.8481 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 576-038655 by 4337 Arecibo on 2024 Dec 25 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 81 0 0 .. .. .... .. .. .. .. .. .. -19 18 19 .. .. .. -19 14 10 .. .. .. .... 82 0 0 -18 56 52 14 12 22.8 1 63 -14 -18 49 58 -19 3 47 -18 45 51 -19 7 55 .... 83 0 0 -18 28 51 14 12 22.5 2 63 -15 -18 21 59 -18 35 44 -18 17 52 -18 39 52 0.38 84 0 0 -18 1 11 14 12 22.0 3 62 -16 -17 54 20 -18 8 3 -17 50 14 -18 12 10 0.46 85 0 0 -17 33 52 14 12 21.4 4 62 -17 -17 27 2 -17 40 43 -17 22 57 -17 44 49 0.50 86 0 0 -17 6 56 14 12 20.6 5 62 -18 -17 0 7 -17 13 45 -16 56 2 -17 17 51 0.53 87 0 0 -16 40 22 14 12 19.6 6 62 -19 -16 33 34 -16 47 10 -16 29 30 -16 51 15 0.54 88 0 0 -16 14 12 14 12 18.5 7 61 -20 -16 7 25 -16 20 59 -16 3 22 -16 25 2 0.56 89 0 0 -15 48 25 14 12 17.1 8 61 -21 -15 41 40 -15 55 11 -15 37 38 -15 59 14 0.57 90 0 0 -15 23 3 14 12 15.6 9 61 -22 -15 16 19 -15 29 48 -15 12 18 -15 33 50 0.57 91 0 0 -14 58 6 14 12 13.9 10 60 -23 -14 51 23 -15 4 49 -14 47 22 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41.6 35 53 -47 - 6 59 55 - 7 12 30 - 6 56 9 - 7 16 17 0.60 117 0 0 - 6 53 50 14 10 36.2 36 52 -48 - 6 47 33 - 7 0 7 - 6 43 48 - 7 3 53 0.60 118 0 0 - 6 41 58 14 10 30.7 37 52 -48 - 6 35 42 - 6 48 15 - 6 31 57 - 6 52 1 0.60 119 0 0 - 6 30 38 14 10 25.1 38 51 -49 - 6 24 23 - 6 36 54 - 6 20 38 - 6 40 39 0.60 120 0 0 - 6 19 49 14 10 19.4 38 51 -50 - 6 13 34 - 6 26 4 - 6 9 50 - 6 29 49 0.60 121 0 0 - 6 9 31 14 10 13.6 39 50 -51 - 6 3 17 - 6 15 46 - 5 59 33 - 6 19 30 0.60 122 0 0 - 5 59 45 14 10 7.7 40 50 -51 - 5 53 31 - 6 5 59 - 5 49 47 - 6 9 43 0.60 123 0 0 - 5 50 29 14 10 1.7 41 49 -52 - 5 44 16 - 5 56 43 - 5 40 33 - 6 0 27 0.61 124 0 0 - 5 41 45 14 9 55.6 42 49 -53 - 5 35 33 - 5 47 58 - 5 31 50 - 5 51 42 0.61 125 0 0 - 5 33 33 14 9 49.4 43 48 -54 - 5 27 21 - 5 39 45 - 5 23 38 - 5 43 29 0.61 126 0 0 - 5 25 52 14 9 43.1 43 48 -54 - 5 19 40 - 5 32 4 - 5 15 57 - 5 35 47 0.61 127 0 0 - 5 18 42 14 9 36.7 44 47 -55 - 5 12 30 - 5 24 53 - 5 8 48 - 5 28 36 0.61 128 0 0 - 5 12 3 14 9 30.3 45 46 -56 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11 -14 23 53 -14 45 11 0.62 -170 0 0 -14 58 34 14 1 51.4 43 327 -35 -14 51 54 -15 5 15 -14 47 54 -15 9 16 0.62 -169 0 0 -15 23 1 14 1 44.9 42 327 -34 -15 16 20 -15 29 44 -15 12 20 -15 33 45 0.62 -168 0 0 -15 47 52 14 1 38.5 41 326 -33 -15 41 9 -15 54 36 -15 37 8 -15 58 37 0.62 -167 0 0 -16 13 6 14 1 32.2 40 325 -32 -16 6 22 -16 19 50 -16 2 20 -16 23 53 0.62 -166 0 0 -16 38 42 14 1 26.1 39 325 -31 -16 31 57 -16 45 28 -16 27 54 -16 49 31 0.62 -165 0 0 -17 4 40 14 1 20.0 39 324 -30 -16 57 54 -17 11 27 -16 53 51 -17 15 31 0.62 -164 0 0 -17 31 0 14 1 14.0 38 323 -29 -17 24 12 -17 37 48 -17 20 9 -17 41 53 0.62 -163 0 0 -17 57 41 14 1 8.2 37 323 -28 -17 50 52 -18 4 30 -17 46 47 -18 8 35 0.62 -162 0 0 -18 24 42 14 1 2.5 36 322 -27 -18 17 52 -18 31 32 -18 13 47 -18 35 38 0.62 -161 0 0 -18 52 2 14 0 56.9 35 321 -26 -18 45 11 -18 58 54 -18 41 5 -19 3 1 0.62 -160 0 0 -19 19 42 14 0 51.4 34 321 -25 -19 12 50 -19 26 35 -19 8 43 -19 30 42 0.62 -159 0 0 -19 47 40 14 0 46.0 33 320 -24 -19 40 47 -19 54 34 -19 36 40 -19 58 42 0.62 -158 0 0 -20 15 56 14 0 40.8 32 319 -23 -20 9 2 -20 22 52 -20 4 54 -20 27 0 0.62 -157 0 0 -20 44 30 14 0 35.8 31 319 -22 -20 37 34 -20 51 26 -20 33 26 -20 55 35 0.63 -156 0 0 -21 13 19 14 0 30.8 30 318 -21 -21 6 23 -21 20 17 -21 2 13 -21 24 27 0.63 -155 0 0 -21 42 24 14 0 26.0 29 318 -20 -21 35 27 -21 49 23 -21 31 17 -21 53 34 0.63 -154 0 0 -22 11 44 14 0 21.4 28 317 -19 -22 4 46 -22 18 44 -22 0 35 -22 22 55 0.63 -153 0 0 -22 41 19 14 0 16.9 27 317 -18 -22 34 19 -22 48 19 -22 30 7 -22 52 31 0.63 -152 0 0 -23 11 6 14 0 12.6 26 316 -17 -23 4 5 -23 18 8 -22 59 53 -23 22 20 0.63 -151 0 0 -23 41 6 14 0 8.4 25 316 -16 -23 34 4 -23 48 9 -23 29 51 -23 52 22 0.63 -150 0 0 -24 11 17 14 0 4.3 24 315 -15 -24 4 14 -24 18 21 -24 0 1 -24 22 35 0.63 -149 0 0 -24 41 40 14 0 0.4 23 315 -14 -24 34 35 -24 48 44 -24 30 22 -24 52 59 0.63 -148 0 0 -25 12 12 13 59 56.7 22 314 -13 -25 5 7 -25 19 17 -25 0 52 -25 23 32 0.63 -147 0 0 -25 42 53 13 59 53.2 21 313 -12 -25 35 47 -25 49 59 -25 31 32 -25 54 15 0.63 -146 0 0 -26 13 42 13 59 49.8 20 313 -11 -26 6 35 -26 20 49 -26 2 20 -26 25 5 0.63 -145 0 0 -26 44 38 13 59 46.5 19 312 -10 -26 37 30 -26 51 46 -26 33 14 -26 56 3 0.63 -144 0 0 -27 15 40 13 59 43.5 18 312 -9 -27 8 32 -27 22 50 -27 4 15 -27 27 7 0.63 -143 0 0 -27 46 48 13 59 40.6 17 311 -8 -27 39 39 -27 53 58 -27 35 22 -27 58 16 0.63 -142 0 0 -28 18 0 13 59 37.8 16 311 -7 -28 10 50 -28 25 11 -28 6 33 -28 29 29 0.63 -141 0 0 -28 49 15 13 59 35.2 15 310 -6 -28 42 4 -28 56 27 -28 37 47 -29 0 45 0.63 -140 0 0 -29 20 33 13 59 32.8 14 310 -5 -29 13 21 -29 27 45 -29 9 3 -29 32 4 0.63 -139 0 0 -29 51 52 13 59 30.6 13 309 -4 -29 44 40 -29 59 5 -29 40 21 -30 3 24 0.63 -138 0 0 -30 23 11 13 59 28.5 12 309 -3 -30 15 58 -30 30 25 -30 11 40 -30 34 44 0.63 -137 0 0 -30 54 30 13 59 26.6 11 308 -2 -30 47 17 -31 1 44 -30 42 58 -31 6 4 0.64 -136 0 0 -31 25 47 13 59 24.9 10 308 -1 -31 18 33 -31 33 2 -31 14 14 -31 37 22 0.64 -135 0 0 -31 57 2 13 59 23.3 9 307 0 -31 49 47 -32 4 17 -31 45 28 -32 8 37 0.64 -134 0 0 -32 28 13 13 59 21.9 8 307 1 -32 20 58 -32 35 28 -32 16 38 -32 39 49 0.64 -133 0 0 -32 59 19 13 59 20.7 7 306 2 -32 52 4 -33 6 35 -32 47 44 -33 10 56 0.64 -132 0 0 -33 30 21 13 59 19.6 6 306 3 -33 23 5 -33 37 37 -33 18 45 -33 41 58 0.64 -131 0 0 -34 1 15 13 59 18.7 5 305 4 -33 54 0 -34 8 31 -33 49 39 -34 12 53 0.64 -130 0 0 -34 32 2 13 59 17.9 4 304 5 -34 24 47 -34 39 19 -34 20 26 -34 43 41 0.65 -129 0 0 -35 2 42 13 59 17.3 3 304 6 -34 55 26 -35 9 58 -34 51 5 -35 14 20 0.65 -128 0 0 -35 33 11 13 59 16.8 2 303 7 -35 25 55 -35 40 28 -35 21 35 -35 44 50 0.67 -127 0 0 -36 3 31 13 59 16.5 2 303 8 -35 56 15 -36 10 48 -35 51 54 -36 15 10 0.69 -126 0 0 -36 33 40 13 59 16.4 1 302 9 -36 26 24 -36 40 57 -36 22 3 -36 45 18 0.79 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: UCAC4 576-038655 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 15 38.0272 DE: +25 01 19.010 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 15 38.0272 DE: +25 01 19.010 * position source: Gaia DR3 * standard error: RA,DE [mas]: (3.000,2.500) * V mag [mag]: 11.6 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4337) Arecibo asteroid class: asteroid system: multiple bodies approx. diameter [km]: 19 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.46470 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 date of fit: 2023 Feb 10 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): 0.028", 0.001", 96.434° remarks: * orbital elements for (4337)Arecibo : Mean anomaly = 241.8064063357 deg Arg. of pericenter = 189.4306510138 deg Long. of node = 41.0528311109 deg Inclination = 2.1882677725 deg Eccentricity = 0.0936094676 Semimajor axis = 3.2638404307 AU Perihelion dist = 2.9583140658 AU Mag: H = 12.49, G = 0.15 Epoch of elements : MJD 60669.58738109 TDT (2024 Dec 25.5874) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Feb10,1.40,2024,12,25,14.097066,-0.089389,-0.511359,-7.699733,1.344473,-0.001439,-0.000089,0.000001,0.000000 163.2613,24.9779,-31.37,-23.37,False UCAC4 576-038655,7.26056310,25.0219473,12.03,11.64,11.43,0.0,0,,7.28641124,24.9779084,5.86,5.62,0,0,0 4337,Arecibo,17.49,19.350,2.4647,0,1,-2.020,4.79,,1.6,0 ,13,48,0.800000,,,,,, 0,241.7082,2024,12,25,189.4307,41.0528,2.1883,0.09361,3.26384,2.95831,12.50,5.0,0.15 1.299,0.0278,0.0028,96,0.0032,Known errors,15.06,0,-1,-1 20241225_038655,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org