IOTA/IOTA-ES occultation update for (5931) Zhvanetskij / TYC 5242-00373-1 event on 2024 Dec 31, 09:53 UT Visible from Summary ------- On 2024 Dec 31 UT, the 21.6331975505336 km diameter asteroid (5931) Zhvanetskij will occult a 10.2 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.00 mag to 18.20 mag (the magnitude of the asteroid) for at most 0.810 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 31, 09:50 - 2024 Dec 31, 09:57 * geocentric midpoint of event [JD]: 2460675.91249784 * magnitude of target star: 10.20 * magnitude drop [mag]: 8.00 * estimated maximum duration [s]: 0.810 * Moon: 1 % sunlit, 61° distance * Sun: 67° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.31 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 85°) * approx speed of asteroid's shadow [km/s]: 27.0078 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5242-00373-1 by 5931 Zhvanetskij on 2024 Dec 31 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 8 0 0 -38 2 40 9 50 31.9 1 92 64 -38 9 24 -37 55 57 -38 13 39 -37 51 42 .... 9 0 0 -38 4 30 9 50 31.9 1 91 64 -38 11 14 -37 57 47 -38 15 30 -37 53 33 0.40 10 0 0 -38 6 11 9 50 32.0 2 91 65 -38 12 55 -37 59 28 -38 17 10 -37 55 13 0.45 11 0 0 -38 7 42 9 50 32.2 3 90 66 -38 14 26 -38 0 59 -38 18 41 -37 56 45 0.47 12 0 0 -38 9 4 9 50 32.4 4 90 66 -38 15 47 -38 2 21 -38 20 2 -37 58 6 0.48 13 0 0 -38 10 15 9 50 32.7 5 89 67 -38 16 59 -38 3 32 -38 21 14 -37 59 18 0.49 14 0 0 -38 11 18 9 50 33.0 5 88 68 -38 18 1 -38 4 35 -38 22 16 -38 0 20 0.50 15 0 0 -38 12 10 9 50 33.4 6 88 68 -38 18 54 -38 5 27 -38 23 9 -38 1 13 0.50 16 0 0 -38 12 53 9 50 33.8 7 87 69 -38 19 36 -38 6 10 -38 23 52 -38 1 56 0.51 17 0 0 -38 13 26 9 50 34.3 8 86 69 -38 20 10 -38 6 43 -38 24 25 -38 2 29 0.51 18 0 0 -38 13 50 9 50 34.8 8 86 70 -38 20 33 -38 7 7 -38 24 48 -38 2 52 0.51 19 0 0 -38 14 3 9 50 35.4 9 85 71 -38 20 47 -38 7 21 -38 25 2 -38 3 6 0.51 20 0 0 -38 14 7 9 50 36.0 10 85 71 -38 20 51 -38 7 25 -38 25 6 -38 3 10 0.51 21 0 0 -38 14 2 9 50 36.7 11 84 72 -38 20 45 -38 7 19 -38 25 0 -38 3 5 0.52 22 0 0 -38 13 46 9 50 37.4 12 83 72 -38 20 30 -38 7 3 -38 24 45 -38 2 49 0.52 23 0 0 -38 13 21 9 50 38.1 12 83 72 -38 20 5 -38 6 38 -38 24 20 -38 2 24 0.52 24 0 0 -38 12 46 9 50 39.0 13 82 73 -38 19 30 -38 6 3 -38 23 45 -38 1 49 0.52 25 0 0 -38 12 2 9 50 39.8 14 81 73 -38 18 45 -38 5 19 -38 23 0 -38 1 4 0.52 26 0 0 -38 11 7 9 50 40.7 15 81 74 -38 17 51 -38 4 24 -38 22 6 -38 0 10 0.52 27 0 0 -38 10 3 9 50 41.7 16 80 74 -38 16 47 -38 3 20 -38 21 2 -37 59 6 0.52 28 0 0 -38 8 49 9 50 42.7 16 79 74 -38 15 33 -38 2 6 -38 19 48 -37 57 52 0.52 29 0 0 -38 7 26 9 50 43.8 17 79 74 -38 14 9 -38 0 43 -38 18 24 -37 56 28 0.52 30 0 0 -38 5 53 9 50 44.9 18 78 75 -38 12 36 -37 59 10 -38 16 51 -37 54 55 0.52 31 0 0 -38 4 10 9 50 46.1 19 77 75 -38 10 53 -37 57 27 -38 15 8 -37 53 12 0.52 32 0 0 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38 16 -37 16 16 0.53 45 0 0 -37 23 19 9 51 7.4 30 68 72 -37 30 3 -37 16 34 -37 34 19 -37 12 19 0.53 46 0 0 -37 19 12 9 51 9.3 30 67 72 -37 25 57 -37 12 28 -37 30 13 -37 8 13 0.53 47 0 0 -37 14 57 9 51 11.2 31 66 71 -37 21 42 -37 8 12 -37 25 58 -37 3 57 0.53 48 0 0 -37 10 32 9 51 13.2 32 65 71 -37 17 17 -37 3 48 -37 21 33 -36 59 32 0.53 49 0 0 -37 5 58 9 51 15.2 33 65 70 -37 12 43 -36 59 13 -37 16 59 -36 54 58 0.53 50 0 0 -37 1 15 9 51 17.2 33 64 70 -37 8 0 -36 54 30 -37 12 16 -36 50 15 0.53 51 0 0 -36 56 23 9 51 19.3 34 63 69 -37 3 8 -36 49 38 -37 7 24 -36 45 22 0.53 52 0 0 -36 51 21 9 51 21.5 35 62 68 -36 58 7 -36 44 36 -37 2 23 -36 40 21 0.53 53 0 0 -36 46 11 9 51 23.7 36 61 68 -36 52 56 -36 39 26 -36 57 13 -36 35 10 0.53 54 0 0 -36 40 52 9 51 25.9 36 61 67 -36 47 37 -36 34 6 -36 51 54 -36 29 50 0.53 55 0 0 -36 35 23 9 51 28.2 37 60 67 -36 42 9 -36 28 38 -36 46 26 -36 24 22 0.53 56 0 0 -36 29 46 9 51 30.5 38 59 66 -36 36 32 -36 23 1 -36 40 49 -36 18 45 0.53 57 0 0 -36 24 0 9 51 32.9 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0 -19 42 28 9 57 15.3 18 274 -31 -19 49 14 -19 35 42 -19 53 31 -19 31 26 0.55 170 0 0 -19 37 5 9 57 16.6 17 274 -31 -19 43 51 -19 30 19 -19 48 8 -19 26 3 0.55 171 0 0 -19 31 52 9 57 17.9 16 274 -32 -19 38 38 -19 25 7 -19 42 55 -19 20 51 0.55 172 0 0 -19 26 50 9 57 19.0 15 273 -33 -19 33 36 -19 20 5 -19 37 52 -19 15 49 0.56 173 0 0 -19 21 58 9 57 20.1 14 273 -33 -19 28 44 -19 15 13 -19 33 1 -19 10 57 0.56 174 0 0 -19 17 18 9 57 21.2 13 272 -34 -19 24 3 -19 10 32 -19 28 20 -19 6 17 0.56 175 0 0 -19 12 47 9 57 22.1 12 272 -35 -19 19 33 -19 6 2 -19 23 49 -19 1 47 0.56 176 0 0 -19 8 28 9 57 23.0 11 272 -36 -19 15 14 -19 1 43 -19 19 30 -18 57 28 0.56 177 0 0 -19 4 20 9 57 23.8 10 271 -36 -19 11 5 -18 57 35 -19 15 21 -18 53 19 0.56 178 0 0 -19 0 22 9 57 24.6 9 271 -37 -19 7 8 -18 53 38 -19 11 24 -18 49 22 0.57 179 0 0 -18 56 36 9 57 25.3 8 271 -37 -19 3 21 -18 49 51 -19 7 38 -18 45 36 0.57 180 0 0 -18 53 1 9 57 25.9 7 270 -38 -18 59 46 -18 46 16 -19 4 2 -18 42 1 0.57 -179 0 0 -18 49 37 9 57 26.4 6 270 -39 -18 56 22 -18 42 52 -19 0 38 -18 38 37 0.58 -178 0 0 -18 46 24 9 57 26.8 5 270 -39 -18 53 9 -18 39 40 -18 57 25 -18 35 24 0.59 -177 0 0 -18 43 23 9 57 27.2 4 269 -40 -18 50 8 -18 36 38 -18 54 23 -18 32 23 0.60 -176 0 0 -18 40 33 9 57 27.5 3 269 -41 -18 47 17 -18 33 48 -18 51 33 -18 29 33 0.62 -175 0 0 -18 37 54 9 57 27.7 3 269 -41 -18 44 38 -18 31 10 -18 48 54 -18 26 54 0.64 -174 0 0 -18 35 27 9 57 27.9 2 268 -42 -18 42 11 -18 28 42 -18 46 27 -18 24 27 0.71 -173 0 0 -18 33 11 9 57 28.0 1 268 -42 -18 39 56 -18 26 27 -18 44 11 -18 22 12 0.98 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: TYC 5242-00373-1 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 05 26.8939 DE: -02 04 27.875 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 05 26.8938 DE: -02 04 27.876 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.2 * B mag [mag]: 10.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5931) Zhvanetskij asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.009 distance from Earth [AU]: 3.40290 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 date of fit: 2023 Apr 25 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): 0.017", 0.002", 84.768° remarks: * orbital elements for (5931)Zhvanetskij : Mean anomaly = 283.9160421823 deg Arg. of pericenter = 265.6259795752 deg Long. of node = 195.8069603276 deg Inclination = 16.9112724708 deg Eccentricity = 0.1957285004 Semimajor axis = 3.1777326642 AU Perihelion dist = 2.5557598151 AU Mag: H = 12.16, G = 0.15 Epoch of elements : MJD 60675.41249776 TDT (2024 Dec 31.4125) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr25,0.81,2024,12,31,9.899948,0.079461,-0.464538,15.025927,2.568884,0.005086,0.002301,-0.000001,0.000000 97.8616,-1.9402,32.30,-23.05,False TYC 5242-00373-1,23.09080389,-2.0744095,10.77,10.20,9.89,0.1,0,,23.11209086,-1.9401969,8.00,7.86,0,0,0 5931,Zhvanetskij,18.20,21.880,3.4029,0,0,2.591,6.64,,1.8,0 0,283.8443,2024,12,31,265.6260,195.8070,16.9113,0.19573,3.17773,2.55576,12.16,5.0,0.15 1.316,0.0167,0.0025,85,0.0028,Known errors,0.91,0,-1,-1 20241231_0373-1,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org