IOTA/IOTA-ES occultation update for (2259) Sofievka / TYC 1867-02653-1 event on 2024 Dec 04, 15:22 UT Visible from Summary ------- On 2024 Dec 04 UT, the 19.3440819543469 km diameter asteroid (2259) Sofievka will occult a 10.9 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.53 mag to 16.41 mag (the magnitude of the asteroid) for at most 1.530 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 04, 15:15 - 2024 Dec 04, 15:29 * geocentric midpoint of event [JD]: 2460649.14080204 * magnitude of target star: 10.89 * magnitude drop [mag]: 5.53 * estimated maximum duration [s]: 1.530 * Moon: 12 % sunlit, 156° distance * Sun: 164° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.003", 95°) * approx speed of asteroid's shadow [km/s]: 12.6987 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1867-02653-1 by 2259 Sofievka on 2024 Dec 4 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 72 0 0 -33 19 54 15 29 48.3 1 58 -15 -33 12 32 -33 27 18 -33 8 57 -33 30 53 .... 73 0 0 -32 49 17 15 29 48.1 2 58 -16 -32 41 55 -32 56 40 -32 38 21 -33 0 15 0.35 74 0 0 -32 18 37 15 29 47.7 3 57 -17 -32 11 16 -32 26 0 -32 7 42 -32 29 35 0.46 75 0 0 -31 47 56 15 29 47.1 4 57 -18 -31 40 35 -31 55 17 -31 37 1 -31 58 52 0.51 76 0 0 -31 17 13 15 29 46.4 5 56 -19 -31 9 52 -31 24 34 -31 6 19 -31 28 8 0.54 77 0 0 -30 46 30 15 29 45.5 6 56 -20 -30 39 10 -30 53 51 -30 35 37 -30 57 25 0.56 78 0 0 -30 15 49 15 29 44.4 7 55 -21 -30 8 29 -30 23 8 -30 4 57 -30 26 42 0.58 79 0 0 -29 45 9 15 29 43.1 8 55 -22 -29 37 50 -29 52 28 -29 34 18 -29 56 1 0.59 80 0 0 -29 14 32 15 29 41.6 9 54 -23 -29 7 14 -29 21 51 -29 3 42 -29 25 23 0.60 81 0 0 -28 43 59 15 29 40.0 10 54 -24 -28 36 42 -28 51 17 -28 33 11 -28 54 49 0.60 82 0 0 -28 13 31 15 29 38.1 11 53 -25 -28 6 15 -28 20 48 -28 2 44 -28 24 20 0.61 83 0 0 -27 43 9 15 29 36.1 12 53 -26 -27 35 54 -27 50 25 -27 32 23 -27 53 57 0.61 84 0 0 -27 12 54 15 29 33.9 13 52 -26 -27 5 39 -27 20 9 -27 2 9 -27 23 40 0.62 85 0 0 -26 42 46 15 29 31.5 14 52 -27 -26 35 32 -26 50 0 -26 32 3 -26 53 31 0.62 86 0 0 -26 12 46 15 29 28.9 15 51 -28 -26 5 34 -26 19 59 -26 2 5 -26 23 30 0.62 87 0 0 -25 42 57 15 29 26.1 16 51 -29 -25 35 45 -25 50 9 -25 32 16 -25 53 38 0.62 88 0 0 -25 13 17 15 29 23.2 17 50 -30 -25 6 7 -25 20 28 -25 2 38 -25 23 57 0.62 89 0 0 -24 43 49 15 29 20.1 18 50 -31 -24 36 39 -24 50 59 -24 33 11 -24 54 27 0.63 90 0 0 -24 14 32 15 29 16.8 19 49 -32 -24 7 24 -24 21 41 -24 3 57 -24 25 9 0.63 91 0 0 -23 45 29 15 29 13.3 20 49 -33 -23 38 22 -23 52 37 -23 34 55 -23 56 4 0.63 92 0 0 -23 16 39 15 29 9.6 21 48 -34 -23 9 33 -23 23 46 -23 6 7 -23 27 13 0.63 93 0 0 -22 48 4 15 29 5.8 22 48 -35 -22 40 59 -22 55 9 -22 37 33 -22 58 36 0.63 94 0 0 -22 19 43 15 29 1.8 23 47 -36 -22 12 39 -22 26 48 -22 9 14 -22 30 14 0.63 95 0 0 -21 51 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6 -11 10 50 -11 30 17 0.65 -168 0 0 -11 38 3 15 17 13.7 32 310 -19 -11 31 29 -11 44 37 -11 28 18 -11 47 48 0.65 -167 0 0 -11 56 1 15 17 8.3 31 310 -18 -11 49 26 -12 2 36 -11 46 15 -12 5 48 0.65 -166 0 0 -12 14 28 15 17 3.1 30 309 -17 -12 7 52 -12 21 4 -12 4 40 -12 24 17 0.65 -165 0 0 -12 33 23 15 16 58.0 29 309 -16 -12 26 47 -12 40 1 -12 23 34 -12 43 14 0.65 -164 0 0 -12 52 47 15 16 53.0 28 309 -15 -12 46 9 -12 59 25 -12 42 56 -13 2 39 0.65 -163 0 0 -13 12 38 15 16 48.1 27 308 -14 -13 5 59 -13 19 18 -13 2 46 -13 22 32 0.65 -162 0 0 -13 32 57 15 16 43.5 26 308 -13 -13 26 17 -13 39 38 -13 23 3 -13 42 53 0.66 -161 0 0 -13 53 44 15 16 38.9 25 307 -12 -13 47 3 -14 0 26 -13 43 48 -14 3 41 0.66 -160 0 0 -14 14 57 15 16 34.5 24 307 -11 -14 8 15 -14 21 40 -14 5 0 -14 24 56 0.66 -159 0 0 -14 36 38 15 16 30.3 23 307 -10 -14 29 54 -14 43 22 -14 26 39 -14 46 38 0.66 -158 0 0 -14 58 44 15 16 26.3 22 306 -9 -14 52 0 -15 5 30 -14 48 44 -15 8 46 0.66 -157 0 0 -15 21 17 15 16 22.4 21 306 -8 -15 14 31 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11 -20 12 46 -20 33 35 0.67 -144 0 0 -20 50 40 15 15 47.6 8 301 5 -20 43 38 -20 57 42 -20 40 14 -21 1 7 0.68 -143 0 0 -21 18 29 15 15 46.2 7 301 6 -21 11 26 -21 25 32 -21 8 1 -21 28 58 0.68 -142 0 0 -21 46 36 15 15 45.0 6 301 7 -21 39 32 -21 53 41 -21 36 7 -21 57 7 0.68 -141 0 0 -22 15 1 15 15 44.0 5 300 8 -22 7 55 -22 22 6 -22 4 29 -22 25 33 0.69 -140 0 0 -22 43 42 15 15 43.2 4 300 10 -22 36 35 -22 50 49 -22 33 9 -22 54 16 0.70 -139 0 0 -23 12 39 15 15 42.6 3 299 11 -23 5 31 -23 19 47 -23 2 4 -23 23 15 0.71 -138 0 0 -23 41 51 15 15 42.2 2 299 12 -23 34 42 -23 49 0 -23 31 15 -23 52 29 0.74 -137 0 0 -24 11 17 15 15 42.0 1 299 13 -24 4 7 -24 18 28 -24 0 39 -24 21 56 0.88 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 1867-02653-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 54 41.2302 DE: +25 38 16.253 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 54 41.2302 DE: +25 38 16.253 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2259) Sofievka asteroid class: approx. diameter [km]: 19 approx. diameter ["]: 0.016 distance from Earth [AU]: 1.68100 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): 0.016", 0.003", 94.69° remarks: * orbital elements for (2259)Sofievka : Mean anomaly = 138.2073250632 deg Arg. of pericenter = 12.3961441305 deg Long. of node = 280.2038015345 deg Inclination = 4.6833309990 deg Eccentricity = 0.1853555352 Semimajor axis = 2.2955179999 AU Perihelion dist = 1.8700310324 AU Mag: H = 12.70, G = 0.15 Epoch of elements : MJD 60648.64080255 TDT (2024 Dec 04.6408) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.53,2024,12,4,15.379249,0.049371,-0.534878,-7.137134,-0.659127,-0.001623,-0.000226,0.000002,0.000000 144.4420,25.6429,-53.07,-22.35,False TYC 1867-02653-1,5.91145282,25.6378479,11.47,10.89,10.58,0.1,0,,5.93756085,25.6429411,5.53,5.39,0,0,0 2259,Sofievka,16.41,19.466,1.6810,0,0,-2.761,-3.45,,1.0,0 0,138.0257,2024,12,4,12.3961,280.2038,4.6833,0.18536,2.29552,1.87003,12.70,5.0,0.15 1.242,0.0163,0.0027,95,0.0039,Known errors,1.11,0,-1,-1 20241204_2653-1,60140.73 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org