IOTA/IOTA-ES occultation update for (3724) Annenskij / UCAC4 452-122895 event on 2024 Dec 28, 11:17 UT Visible from Summary ------- On 2024 Dec 28 UT, the 13.872 km diameter asteroid (3724) Annenskij will occult a 11.5 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.30 mag to 16.78 mag (the magnitude of the asteroid) for at most 0.450 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 28, 11:14 - 2024 Dec 28, 11:19 * geocentric midpoint of event [JD]: 2460672.97017333 * magnitude of target star: 11.49 * magnitude drop [mag]: 5.30 * estimated maximum duration [s]: 0.450 * Moon: 7 % sunlit, 97° distance * Sun: 67° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 66°) * approx speed of asteroid's shadow [km/s]: 30.8413 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 452-122895 by 3724 Annenskij on 2024 Dec 28 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 - 12 0 0 -58 34 9 11 14 27.7 0 89 51 -58 39 8 -58 29 11 -58 42 8 -58 26 11 .... - 11 0 0 -58 33 32 11 14 27.7 1 88 51 -58 38 31 -58 28 34 -58 41 31 -58 25 34 0.60 - 10 0 0 -58 32 42 11 14 27.8 1 87 51 -58 37 41 -58 27 43 -58 40 41 -58 24 44 0.70 - 9 0 0 -58 31 39 11 14 27.9 2 86 52 -58 36 38 -58 26 40 -58 39 38 -58 23 41 0.75 - 8 0 0 -58 30 23 11 14 28.0 2 85 52 -58 35 22 -58 25 24 -58 38 22 -58 22 25 0.77 - 7 0 0 -58 28 54 11 14 28.1 3 85 52 -58 33 53 -58 23 55 -58 36 53 -58 20 55 0.79 - 6 0 0 -58 27 12 11 14 28.2 4 84 53 -58 32 11 -58 22 13 -58 35 11 -58 19 13 0.80 - 5 0 0 -58 25 16 11 14 28.4 4 83 53 -58 30 16 -58 20 17 -58 33 16 -58 17 18 0.81 - 4 0 0 -58 23 8 11 14 28.6 5 82 53 -58 28 8 -58 18 9 -58 31 8 -58 15 9 0.82 - 3 0 0 -58 20 47 11 14 28.8 5 81 53 -58 25 46 -58 15 48 -58 28 47 -58 12 48 0.82 - 2 0 0 -58 18 12 11 14 29.0 6 80 54 -58 23 12 -58 13 13 -58 26 13 -58 10 13 0.83 - 1 0 0 -58 15 25 11 14 29.3 6 79 54 -58 20 25 -58 10 25 -58 23 25 -58 7 25 0.83 0 0 0 -58 12 24 11 14 29.6 7 79 54 -58 17 24 -58 7 24 -58 20 25 -58 4 24 0.83 1 0 0 -58 9 10 11 14 29.9 7 78 54 -58 14 10 -58 4 10 -58 17 11 -58 1 10 0.84 2 0 0 -58 5 43 11 14 30.2 8 77 54 -58 10 43 -58 0 43 -58 13 45 -57 57 42 0.84 3 0 0 -58 2 3 11 14 30.6 8 76 55 -58 7 3 -57 57 2 -58 10 4 -57 54 2 0.84 4 0 0 -57 58 9 11 14 30.9 9 75 55 -58 3 10 -57 53 8 -58 6 11 -57 50 8 0.84 5 0 0 -57 54 2 11 14 31.3 9 74 55 -57 59 3 -57 49 1 -58 2 5 -57 46 0 0.84 6 0 0 -57 49 41 11 14 31.8 10 73 55 -57 54 43 -57 44 40 -57 57 45 -57 41 39 0.84 7 0 0 -57 45 8 11 14 32.2 10 73 55 -57 50 9 -57 40 6 -57 53 11 -57 37 5 0.85 8 0 0 -57 40 20 11 14 32.7 11 72 55 -57 45 22 -57 35 19 -57 48 25 -57 32 17 0.85 9 0 0 -57 35 20 11 14 33.2 11 71 56 -57 40 22 -57 30 18 -57 43 24 -57 27 16 0.85 10 0 0 -57 30 6 11 14 33.7 12 70 56 -57 35 8 -57 25 3 -57 38 11 -57 22 2 0.85 11 0 0 -57 24 38 11 14 34.3 13 69 56 -57 29 41 -57 19 35 -57 32 43 -57 16 33 0.85 12 0 0 -57 18 57 11 14 34.9 13 68 56 -57 24 0 -57 13 54 -57 27 3 -57 10 52 0.85 13 0 0 -57 13 2 11 14 35.5 14 67 56 -57 18 5 -57 7 59 -57 21 8 -57 4 56 0.85 14 0 0 -57 6 53 11 14 36.1 14 66 56 -57 11 57 -57 1 50 -57 15 0 -56 58 47 0.85 15 0 0 -57 0 31 11 14 36.8 15 66 56 -57 5 35 -56 55 27 -57 8 39 -56 52 24 0.85 16 0 0 -56 53 55 11 14 37.5 15 65 56 -56 59 0 -56 48 51 -57 2 3 -56 45 48 0.85 17 0 0 -56 47 5 11 14 38.2 16 64 56 -56 52 10 -56 42 0 -56 55 14 -56 38 57 0.85 18 0 0 -56 40 2 11 14 39.0 16 63 56 -56 45 7 -56 34 56 -56 48 11 -56 31 53 0.85 19 0 0 -56 32 44 11 14 39.7 17 62 56 -56 37 50 -56 27 39 -56 40 54 -56 24 35 0.85 20 0 0 -56 25 13 11 14 40.5 17 61 56 -56 30 19 -56 20 7 -56 33 24 -56 17 3 0.85 21 0 0 -56 17 28 11 14 41.4 18 60 56 -56 22 34 -56 12 21 -56 25 39 -56 9 17 0.86 22 0 0 -56 9 28 11 14 42.2 19 59 56 -56 14 35 -56 4 22 -56 17 41 -56 1 17 0.86 23 0 0 -56 1 15 11 14 43.1 19 59 56 -56 6 23 -55 56 8 -56 9 28 -55 53 3 0.86 24 0 0 -55 52 48 11 14 44.1 20 58 56 -55 57 56 -55 47 40 -56 1 2 -55 44 35 0.86 25 0 0 -55 44 7 11 14 45.0 20 57 56 -55 49 15 -55 38 59 -55 52 21 -55 35 53 0.86 26 0 0 -55 35 11 11 14 46.0 21 56 56 -55 40 20 -55 30 3 -55 43 27 -55 26 57 0.86 27 0 0 -55 26 2 11 14 47.0 21 55 56 -55 31 11 -55 20 53 -55 34 18 -55 17 47 0.86 28 0 0 -55 16 39 11 14 48.1 22 54 56 -55 21 48 -55 11 29 -55 24 55 -55 8 23 0.86 29 0 0 -55 7 1 11 14 49.1 22 53 56 -55 12 11 -55 1 51 -55 15 18 -54 58 45 0.86 30 0 0 -54 57 9 11 14 50.2 23 52 55 -55 2 20 -54 51 59 -55 5 27 -54 48 52 0.86 31 0 0 -54 47 3 11 14 51.4 24 51 55 -54 52 14 -54 41 52 -54 55 22 -54 38 46 0.86 32 0 0 -54 36 43 11 14 52.6 24 50 55 -54 41 55 -54 31 32 -54 45 3 -54 28 25 0.86 33 0 0 -54 26 9 11 14 53.8 25 49 55 -54 31 21 -54 20 57 -54 34 29 -54 17 50 0.86 34 0 0 -54 15 20 11 14 55.0 25 49 55 -54 20 33 -54 10 8 -54 23 41 -54 7 0 0.86 35 0 0 -54 4 18 11 14 56.3 26 48 55 -54 9 31 -53 59 5 -54 12 40 -53 55 57 0.86 36 0 0 -53 53 1 11 14 57.6 26 47 54 -53 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0 0 -44 5 1 11 16 14.6 46 3 35 -44 10 27 -43 59 35 -44 13 43 -43 56 19 0.87 75 0 0 -43 46 11 11 16 17.3 46 2 35 -43 51 37 -43 40 45 -43 54 54 -43 37 30 0.87 76 0 0 -43 27 15 11 16 20.1 46 0 34 -43 32 41 -43 21 49 -43 35 58 -43 18 34 0.87 77 0 0 -43 8 13 11 16 22.9 47 359 33 -43 13 39 -43 2 48 -43 16 56 -42 59 32 0.87 78 0 0 -42 49 6 11 16 25.7 47 357 32 -42 54 32 -42 43 41 -42 57 49 -42 40 25 0.87 79 0 0 -42 29 54 11 16 28.6 47 356 32 -42 35 20 -42 24 29 -42 38 37 -42 21 13 0.87 80 0 0 -42 10 38 11 16 31.4 47 354 31 -42 16 4 -42 5 12 -42 19 21 -42 1 57 0.87 81 0 0 -41 51 18 11 16 34.3 48 353 30 -41 56 44 -41 45 52 -42 0 0 -41 42 36 0.87 82 0 0 -41 31 54 11 16 37.2 48 351 29 -41 37 20 -41 26 28 -41 40 36 -41 23 13 0.87 83 0 0 -41 12 27 11 16 40.2 48 350 28 -41 17 53 -41 7 2 -41 21 9 -41 3 46 0.87 84 0 0 -40 52 58 11 16 43.2 48 348 28 -40 58 23 -40 47 32 -41 1 40 -40 44 17 0.87 85 0 0 -40 33 26 11 16 46.2 48 347 27 -40 38 52 -40 28 1 -40 42 8 -40 24 46 0.87 86 0 0 -40 13 53 11 16 49.2 49 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278 -26 -25 0 15 -24 50 11 -25 3 18 -24 47 10 0.90 148 0 0 -24 48 53 11 19 28.4 16 278 -27 -24 53 55 -24 43 51 -24 56 57 -24 40 50 0.90 149 0 0 -24 42 55 11 19 29.6 15 277 -27 -24 47 56 -24 37 53 -24 50 58 -24 34 52 0.90 150 0 0 -24 37 19 11 19 30.7 14 277 -28 -24 42 20 -24 32 17 -24 45 22 -24 29 16 0.90 151 0 0 -24 32 5 11 19 31.7 13 276 -29 -24 37 6 -24 27 4 -24 40 8 -24 24 3 0.91 152 0 0 -24 27 14 11 19 32.7 12 276 -29 -24 32 15 -24 22 13 -24 35 16 -24 19 12 0.91 153 0 0 -24 22 45 11 19 33.6 11 276 -30 -24 27 46 -24 17 44 -24 30 47 -24 14 44 0.91 154 0 0 -24 18 39 11 19 34.4 10 275 -31 -24 23 40 -24 13 38 -24 26 41 -24 10 38 0.91 155 0 0 -24 14 55 11 19 35.1 9 275 -31 -24 19 56 -24 9 55 -24 22 57 -24 6 54 0.92 156 0 0 -24 11 34 11 19 35.8 8 274 -32 -24 16 35 -24 6 34 -24 19 36 -24 3 33 0.92 157 0 0 -24 8 36 11 19 36.4 8 274 -33 -24 13 36 -24 3 36 -24 16 37 -24 0 35 0.93 158 0 0 -24 6 0 11 19 37.0 7 273 -33 -24 11 0 -24 1 0 -24 14 1 -23 58 0 0.94 159 0 0 -24 3 47 11 19 37.4 6 273 -34 -24 8 47 -23 58 47 -24 11 48 -23 55 47 0.94 160 0 0 -24 1 57 11 19 37.8 5 273 -34 -24 6 57 -23 56 57 -24 9 58 -23 53 57 0.96 161 0 0 -24 0 29 11 19 38.2 4 272 -35 -24 5 29 -23 55 30 -24 8 30 -23 52 29 0.98 162 0 0 -23 59 25 11 19 38.5 3 272 -35 -24 4 25 -23 54 25 -24 7 26 -23 51 25 1.01 163 0 0 -23 58 43 11 19 38.6 2 271 -36 -24 3 43 -23 53 43 -24 6 44 -23 50 43 1.06 164 0 0 -23 58 24 11 19 38.8 1 271 -36 -24 3 24 -23 53 24 -24 6 25 -23 50 24 1.21 165 0 0 -23 58 28 11 19 38.8 0 270 -37 -24 3 28 -23 53 28 -24 6 28 -23 50 28 2.33 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: UCAC4 452-122895 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 49 52.4060 DE: +00 12 53.478 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 49 52.4060 DE: +00 12 53.477 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.200) * V mag [mag]: 11.5 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3724) Annenskij asteroid class: approx. diameter [km]: 14 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.53190 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.015", 0.001", 65.623° remarks: * orbital elements for (3724)Annenskij : Mean anomaly = 344.8080224064 deg Arg. of pericenter = 119.0926962776 deg Long. of node = 269.0713458931 deg Inclination = 7.7527744797 deg Eccentricity = 0.1632711371 Semimajor axis = 2.7634951967 AU Perihelion dist = 2.3122961935 AU Mag: H = 11.84, G = 0.15 Epoch of elements : MJD 60672.47017325 TDT (2024 Dec 28.4702) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,0.45,2024,12,28,11.284160,0.194429,-0.627204,16.625778,5.158608,0.004825,0.002302,-0.000001,0.000000 76.1032,0.3466,11.18,-23.24,False UCAC4 452-122895,22.83122394,0.2148552,12.04,11.49,11.19,0.0,0,,22.85239301,0.3466337,5.30,5.14,0,0,0 3724,Annenskij,16.78,13.872,2.5319,0,0,3.850,17.92,,0.8,0 0,344.7071,2024,12,28,119.0927,269.0713,7.7528,0.16327,2.76350,2.31230,11.83,5.0,0.15 1.301,0.0153,0.0013,66,0.0023,Known errors,0.84,0,-1,-1 20241228_122895,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:12 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org