IOTA/IOTA-ES occultation update for (693) Zerbinetta / UCAC4 277-163523 event on 2024 Oct 24, 17:22 UT Visible from Summary ------- On 2024 Oct 24 UT, the 75.709 km diameter asteroid (693) Zerbinetta will occult a 11.7 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 3.66 mag to 15.30 mag (the magnitude of the asteroid) for at most 2.310 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: 100 * date and approx. time of event: 2024 Oct 24, 17:19 - 2024 Oct 24, 17:25 * geocentric midpoint of event [JD]: 2460608.22385875 * magnitude of target star: 11.68 * magnitude drop [mag]: 3.66 * estimated maximum duration [s]: 2.310 * Moon: 46 % sunlit, 146° distance * Sun: 61° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 81 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.003", 85°) * approx speed of asteroid's shadow [km/s]: 32.8193 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 277-163523 by 693 Zerbinetta on 2024 Oct 24 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 -130 0 0 -25 51 57 17 19 19.1 0 129 44 -26 20 13 .. .. .. -26 25 36 .. .. .. .... -129 0 0 -26 35 53 17 19 19.1 1 128 45 -27 4 9 -26 7 43 -27 9 31 -26 2 24 0.37 -128 0 0 -27 19 30 17 19 19.3 3 128 46 -27 47 45 -26 51 21 -27 53 7 -26 46 2 0.37 -127 0 0 -28 2 47 17 19 19.5 4 128 47 -28 31 2 -27 34 39 -28 36 23 -27 29 20 0.37 -126 0 0 -28 45 43 17 19 19.8 5 127 47 -29 13 56 -28 17 37 -29 19 18 -28 12 18 0.37 -125 0 0 -29 28 17 17 19 20.2 6 127 48 -29 56 28 -29 0 12 -30 1 49 -28 54 53 0.37 -124 0 0 -30 10 26 17 19 20.7 7 126 49 -30 38 35 -29 42 23 -30 43 56 -29 37 5 0.37 -123 0 0 -30 52 9 17 19 21.2 8 126 49 -31 20 16 -30 24 9 -31 25 36 -30 18 51 0.37 -122 0 0 -31 33 25 17 19 21.8 9 125 50 -32 1 29 -31 5 28 -32 6 49 -31 0 11 0.37 -121 0 0 -32 14 13 17 19 22.5 10 125 50 -32 42 14 -31 46 19 -32 47 34 -31 41 2 0.37 -120 0 0 -32 54 32 17 19 23.2 11 124 51 -33 22 30 -32 26 41 -33 27 48 -32 21 25 0.37 -119 0 0 -33 34 20 17 19 24.0 12 123 51 -34 2 14 -33 6 33 -34 7 32 -33 1 17 0.37 -118 0 0 -34 13 37 17 19 24.9 13 123 52 -34 41 27 -33 45 53 -34 46 44 -33 40 39 0.37 -117 0 0 -34 52 21 17 19 25.8 15 122 52 -35 20 7 -34 24 42 -35 25 23 -34 19 28 0.37 -116 0 0 -35 30 32 17 19 26.8 16 122 53 -35 58 14 -35 2 57 -36 3 29 -34 57 44 0.37 -115 0 0 -36 8 9 17 19 27.9 17 121 53 -36 35 46 -35 40 39 -36 41 0 -35 35 26 0.37 -114 0 0 -36 45 11 17 19 28.9 18 120 53 -37 12 42 -36 17 45 -37 17 56 -36 12 34 0.37 -113 0 0 -37 21 37 17 19 30.1 19 120 54 -37 49 4 -36 54 17 -37 54 16 -36 49 7 0.37 -112 0 0 -37 57 28 17 19 31.3 20 119 54 -38 24 48 -37 30 13 -38 30 0 -37 25 3 0.37 -111 0 0 -38 32 41 17 19 32.5 21 118 54 -38 59 56 -38 5 32 -39 5 7 -38 0 24 0.37 -110 0 0 -39 7 18 17 19 33.8 22 118 54 -39 34 27 -38 40 14 -39 39 36 -38 35 7 0.37 -109 0 0 -39 41 17 17 19 35.1 22 117 55 -40 8 20 -39 14 19 -40 13 28 -39 9 14 0.37 -108 0 0 -40 14 38 17 19 36.4 23 116 55 -40 41 36 -39 47 47 -40 46 43 -39 42 42 0.37 -107 0 0 -40 47 22 17 19 37.8 24 116 55 -41 14 13 -40 20 37 -41 19 19 -40 15 33 0.37 -106 0 0 -41 19 27 17 19 39.2 25 115 55 -41 46 11 -40 52 49 -41 51 16 -40 47 46 0.37 -105 0 0 -41 50 54 17 19 40.6 26 114 55 -42 17 32 -41 24 22 -42 22 35 -41 19 21 0.37 -104 0 0 -42 21 43 17 19 42.1 27 113 55 -42 48 14 -41 55 17 -42 53 16 -41 50 17 0.37 -103 0 0 -42 51 53 17 19 43.6 28 113 55 -43 18 17 -42 25 34 -43 23 18 -42 20 36 0.37 -102 0 0 -43 21 25 17 19 45.1 29 112 55 -43 47 42 -42 55 13 -43 52 42 -42 50 16 0.37 -101 0 0 -43 50 19 17 19 46.7 30 111 55 -44 16 29 -43 24 13 -44 21 27 -43 19 17 0.37 -100 0 0 -44 18 34 17 19 48.3 30 110 55 -44 44 37 -43 52 36 -44 49 34 -43 47 41 0.37 - 99 0 0 -44 46 11 17 19 49.9 31 109 55 -45 12 7 -44 20 20 -45 17 3 -44 15 26 0.37 - 98 0 0 -45 13 10 17 19 51.5 32 109 55 -45 39 0 -44 47 26 -45 43 54 -44 42 34 0.37 - 97 0 0 -45 39 32 17 19 53.1 33 108 55 -46 5 14 -45 13 55 -46 10 7 -45 9 4 0.37 - 96 0 0 -46 5 16 17 19 54.7 34 107 55 -46 30 51 -45 39 46 -46 35 43 -45 34 57 0.37 - 95 0 0 -46 30 23 17 19 56.4 35 106 54 -46 55 51 -46 5 0 -47 0 41 -46 0 12 0.37 - 94 0 0 -46 54 53 17 19 58.0 35 105 54 -47 20 14 -46 29 37 -47 25 3 -46 24 50 0.37 - 93 0 0 -47 18 47 17 19 59.7 36 104 54 -47 44 1 -46 53 38 -47 48 48 -46 48 52 0.37 - 92 0 0 -47 42 4 17 20 1.4 37 103 54 -48 7 11 -47 17 2 -48 11 57 -47 12 18 0.37 - 91 0 0 -48 4 46 17 20 3.1 38 102 54 -48 29 46 -47 39 51 -48 34 30 -47 35 8 0.37 - 90 0 0 -48 26 52 17 20 4.8 38 102 53 -48 51 45 -48 2 3 -48 56 28 -47 57 22 0.37 - 89 0 0 -48 48 23 17 20 6.5 39 101 53 -49 13 9 -48 23 41 -49 17 51 -48 19 1 0.37 - 88 0 0 -49 9 19 17 20 8.3 40 100 53 -49 33 58 -48 44 44 -49 38 39 -48 40 5 0.37 - 87 0 0 -49 29 41 17 20 10.0 40 99 53 -49 54 13 -49 5 12 -49 58 52 -49 0 35 0.37 - 86 0 0 -49 49 28 17 20 11.7 41 98 52 -50 13 54 -49 25 7 -50 18 32 -49 20 30 0.37 - 85 0 0 -50 8 43 17 20 13.4 42 97 52 -50 33 2 -49 44 28 -50 37 39 -49 39 53 0.37 - 84 0 0 -50 27 24 17 20 15.2 42 96 52 -50 51 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26 18 -39 22 5 0.38 27 0 0 -39 20 11 17 24 3.9 51 261 -9 -39 47 20 -38 53 8 -39 52 29 -38 48 1 0.38 28 0 0 -38 45 36 17 24 6.6 50 260 -10 -39 12 51 -38 18 27 -39 18 2 -38 13 19 0.38 29 0 0 -38 10 23 17 24 9.3 49 259 -11 -38 37 44 -37 43 8 -38 42 56 -37 37 59 0.38 30 0 0 -37 34 33 17 24 12.0 48 257 -12 -38 1 59 -37 7 12 -38 7 12 -37 2 1 0.38 31 0 0 -36 58 5 17 24 14.7 47 256 -13 -37 25 37 -36 30 39 -37 30 51 -36 25 27 0.38 32 0 0 -36 21 1 17 24 17.4 46 255 -14 -36 48 38 -35 53 29 -36 53 53 -35 48 17 0.38 33 0 0 -35 43 21 17 24 20.1 45 254 -15 -36 11 3 -35 15 44 -36 16 19 -35 10 31 0.38 34 0 0 -35 5 6 17 24 22.8 44 253 -16 -35 32 53 -34 37 24 -35 38 10 -34 32 10 0.38 35 0 0 -34 26 16 17 24 25.4 43 253 -17 -34 54 8 -33 58 30 -34 59 25 -33 53 15 0.38 36 0 0 -33 46 53 17 24 28.1 42 252 -18 -34 14 49 -33 19 3 -34 20 7 -33 13 47 0.38 37 0 0 -33 6 57 17 24 30.7 41 251 -19 -33 34 57 -32 39 3 -33 40 16 -32 33 46 0.38 38 0 0 -32 26 29 17 24 33.2 40 250 -20 -32 54 33 -31 58 32 -32 59 53 -31 53 14 0.38 39 0 0 -31 45 31 17 24 35.8 39 249 -21 -32 13 38 -31 17 30 -32 18 58 -31 12 12 0.38 40 0 0 -31 4 3 17 24 38.3 38 248 -22 -31 32 13 -30 35 59 -31 37 34 -30 30 41 0.38 41 0 0 -30 22 7 17 24 40.8 37 248 -23 -30 50 20 -29 54 1 -30 55 42 -29 48 42 0.38 42 0 0 -29 39 45 17 24 43.2 36 247 -24 -30 8 0 -29 11 36 -30 13 22 -29 6 17 0.38 43 0 0 -28 56 57 17 24 45.6 35 246 -25 -29 25 14 -28 28 46 -29 30 36 -28 23 27 0.38 44 0 0 -28 13 45 17 24 47.9 34 245 -26 -28 42 4 -27 45 33 -28 47 26 -27 40 13 0.38 45 0 0 -27 30 11 17 24 50.2 33 245 -28 -27 58 31 -27 1 57 -28 3 54 -26 56 37 0.38 46 0 0 -26 46 15 17 24 52.5 32 244 -29 -27 14 36 -26 18 1 -27 19 59 -26 12 41 0.38 47 0 0 -26 2 1 17 24 54.6 31 244 -30 -26 30 22 -25 33 46 -26 35 46 -25 28 26 0.39 48 0 0 -25 17 29 17 24 56.8 29 243 -31 -25 45 51 -24 49 14 -25 51 14 -24 43 54 0.39 49 0 0 -24 32 41 17 24 58.8 28 242 -32 -25 1 3 -24 4 27 -25 6 26 -23 59 6 0.39 50 0 0 -23 47 40 17 25 0.8 27 242 -33 -24 16 1 -23 19 26 -24 21 24 -23 14 5 0.39 51 0 0 -23 2 26 17 25 2.8 26 241 -35 -23 30 46 -22 34 13 -23 36 9 -22 28 53 0.39 52 0 0 -22 17 3 17 25 4.6 25 241 -36 -22 45 21 -21 48 50 -22 50 44 -21 43 31 0.39 53 0 0 -21 31 30 17 25 6.4 24 240 -37 -21 59 47 -21 3 20 -22 5 10 -20 58 0 0.39 54 0 0 -20 45 52 17 25 8.1 22 240 -38 -21 14 7 -20 17 43 -21 19 29 -20 12 24 0.39 55 0 0 -20 0 9 17 25 9.8 21 240 -39 -20 28 22 -19 32 3 -20 33 43 -19 26 44 0.39 56 0 0 -19 14 24 17 25 11.3 20 239 -41 -19 42 34 -18 46 20 -19 47 55 -18 41 2 0.39 57 0 0 -18 28 38 17 25 12.8 19 239 -42 -18 56 45 -18 0 37 -19 2 5 -17 55 19 0.40 58 0 0 -17 42 53 17 25 14.2 18 238 -43 -18 10 57 -17 14 56 -18 16 16 -17 9 39 0.40 59 0 0 -16 57 12 17 25 15.5 16 238 -44 -17 25 12 -16 29 18 -17 30 31 -16 24 2 0.40 60 0 0 -16 11 36 17 25 16.7 15 238 -46 -16 39 32 -15 43 46 -16 44 50 -15 38 30 0.40 61 0 0 -15 26 7 17 25 17.8 14 237 -47 -15 53 59 -14 58 21 -15 59 16 -14 53 6 0.40 62 0 0 -14 40 47 17 25 18.8 13 237 -48 -15 8 34 -14 13 6 -15 13 51 -14 7 52 0.41 63 0 0 -13 55 38 17 25 19.8 12 237 -49 -14 23 21 -13 28 2 -14 28 37 -13 22 48 0.41 64 0 0 -13 10 42 17 25 20.6 10 237 -50 -13 38 19 -12 43 10 -13 43 34 -12 37 58 0.42 65 0 0 -12 26 0 17 25 21.4 9 236 -52 -12 53 32 -11 58 33 -12 58 46 -11 53 22 0.42 66 0 0 -11 41 34 17 25 22.0 8 236 -53 -12 9 1 -11 14 13 -12 14 14 -11 9 3 0.43 67 0 0 -10 57 26 17 25 22.6 7 236 -54 -11 24 47 -10 30 10 -11 29 59 -10 25 1 0.44 68 0 0 -10 13 37 17 25 23.1 5 236 -55 -10 40 53 - 9 46 28 -10 46 4 - 9 41 19 0.45 69 0 0 - 9 30 10 17 25 23.4 4 236 -57 - 9 57 19 - 9 3 6 -10 2 29 - 8 57 59 0.47 70 0 0 - 8 47 4 17 25 23.7 3 235 -58 - 9 14 8 - 8 20 7 - 9 19 16 - 8 15 1 0.52 71 0 0 - 8 4 23 17 25 23.9 2 235 -59 - 8 31 20 - 7 37 32 - 8 36 27 - 7 32 27 0.61 72 0 0 - 7 22 7 17 25 24.0 1 235 -60 - 7 48 58 - 6 55 22 - 7 54 4 - 6 50 18 1.12 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 277-163523 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 08 35.6225 DE: -34 36 44.605 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 08 35.6224 DE: -34 36 44.605 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.7 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (693) Zerbinetta asteroid class: approx. diameter [km]: 76 approx. diameter ["]: 0.033 distance from Earth [AU]: 3.20560 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.013", 0.003", 85.369° remarks: * orbital elements for (693)Zerbinetta : Mean anomaly = 12.8392474090 deg Arg. of pericenter = 283.7925833257 deg Long. of node = 351.6974842675 deg Inclination = 14.1885283540 deg Eccentricity = 0.0299059758 Semimajor axis = 2.9442581324 AU Perihelion dist = 2.8562072199 AU Mag: H = 9.56, G = 0.15 Epoch of elements : MJD 60607.72385849 TDT (2024 Oct 24.7239) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,2.31,2024,10,24,17.372610,0.068363,-0.336397,18.148088,3.713486,0.005099,-0.000466,-0.000001,0.000000 -21.6345,-34.6103,-84.56,-12.10,False UCAC4 277-163523,18.14322850,-34.6123902,12.39,11.68,11.30,0.0,0,,18.17049011,-34.6103105,3.65,3.59,0,0,0 693,Zerbinetta,15.30,75.709,3.2056,0,0,4.033,10.19,,3.8,0 0,12.6980,2024,10,24,283.7926,351.6975,14.1885,0.02991,2.94426,2.85621,9.56,5.0,0.15 1.095,0.0130,0.0027,85,0.0031,Known errors,0.95,0,-1,-1 20241024_163523,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org