IOTA/IOTA-ES occultation update for (1223) Neckar / UCAC4 569-012887 event on 2024 Oct 22, 22:02 UT Visible from Summary ------- On 2024 Oct 22 UT, the 23.742 km diameter asteroid (1223) Neckar will occult a 11.8 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 3.27 mag to 14.96 mag (the magnitude of the asteroid) for at most 6.790 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: 96 * date and approx. time of event: 2024 Oct 22, 21:35 - 2024 Oct 22, 22:30 * geocentric midpoint of event [JD]: 2460606.41844729 * magnitude of target star: 11.75 * magnitude drop [mag]: 3.27 * estimated maximum duration [s]: 6.790 * Moon: 64 % sunlit, 29° distance * Sun: 135° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 27 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 6.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.003", 82°) * approx speed of asteroid's shadow [km/s]: 3.4954 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 569-012887 by 1223 Neckar on 2024 Oct 22 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 - 18 0 0 -13 48 47 22 29 26.0 1 65 -46 -13 40 36 -13 56 59 -13 33 56 -14 3 41 .... - 17 0 0 -13 22 29 22 29 25.1 2 65 -47 -13 14 19 -13 30 39 -13 7 41 -13 37 19 0.33 - 16 0 0 -12 56 36 22 29 23.6 3 65 -48 -12 48 28 -13 4 45 -12 41 51 -13 11 24 0.42 - 15 0 0 -12 31 10 22 29 21.3 4 65 -49 -12 23 4 -12 39 17 -12 16 28 -12 45 55 0.47 - 14 0 0 -12 6 11 22 29 18.3 5 64 -50 -11 58 6 -12 14 16 -11 51 31 -12 20 52 0.49 - 13 0 0 -11 41 38 22 29 14.7 6 64 -51 -11 33 35 -11 49 42 -11 27 2 -11 56 16 0.51 - 12 0 0 -11 17 32 22 29 10.5 7 64 -52 -11 9 31 -11 25 34 -11 2 59 -11 32 8 0.52 - 11 0 0 -10 53 54 22 29 5.5 8 64 -53 -10 45 54 -11 1 55 -10 39 23 -11 8 27 0.52 - 10 0 0 -10 30 43 22 28 59.9 9 64 -54 -10 22 45 -10 38 42 -10 16 16 -10 45 13 0.53 - 9 0 0 -10 8 0 22 28 53.7 10 63 -55 -10 0 3 -10 15 58 - 9 53 35 -10 22 27 0.53 - 8 0 0 - 9 45 45 22 28 46.9 11 63 -56 - 9 37 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21 37 52.9 21 311 11 -25 37 32 -25 54 31 -25 30 38 -26 1 28 0.59 129 0 0 -26 15 39 21 37 40.6 20 311 12 -26 7 9 -26 24 10 -26 0 14 -26 31 7 0.59 130 0 0 -26 45 20 21 37 29.0 19 310 12 -26 36 49 -26 53 52 -26 29 54 -27 0 50 0.59 131 0 0 -27 15 5 21 37 17.9 18 310 13 -27 6 33 -27 23 38 -26 59 37 -27 30 36 0.59 132 0 0 -27 44 52 21 37 7.4 17 309 14 -27 36 20 -27 53 26 -27 29 23 -28 0 25 0.59 133 0 0 -28 14 41 21 36 57.5 16 309 15 -28 6 8 -28 23 15 -27 59 10 -28 30 15 0.59 134 0 0 -28 44 31 21 36 48.2 15 308 16 -28 35 57 -28 53 6 -28 28 59 -29 0 6 0.60 135 0 0 -29 14 20 21 36 39.5 14 308 17 -29 5 46 -29 22 56 -28 58 47 -29 29 56 0.60 136 0 0 -29 44 9 21 36 31.3 13 307 18 -29 35 34 -29 52 45 -29 28 35 -29 59 46 0.60 137 0 0 -30 13 56 21 36 23.8 12 307 19 -30 5 21 -30 22 32 -29 58 21 -30 29 34 0.60 138 0 0 -30 43 40 21 36 16.9 11 306 19 -30 35 4 -30 52 17 -30 28 5 -30 59 19 0.60 139 0 0 -31 13 21 21 36 10.5 10 306 20 -31 4 45 -31 21 59 -30 57 45 -31 29 1 0.60 140 0 0 -31 42 58 21 36 4.8 9 305 21 -31 34 21 -31 51 35 -31 27 21 -31 58 38 0.60 141 0 0 -32 12 29 21 35 59.6 8 305 22 -32 3 52 -32 21 7 -31 56 52 -32 28 10 0.60 142 0 0 -32 41 55 21 35 55.1 7 304 23 -32 33 18 -32 50 33 -32 26 17 -32 57 36 0.60 143 0 0 -33 11 13 21 35 51.1 6 304 24 -33 2 36 -33 19 52 -32 55 35 -33 26 54 0.60 144 0 0 -33 40 24 21 35 47.7 5 303 24 -33 31 47 -33 49 2 -33 24 46 -33 56 5 0.61 145 0 0 -34 9 26 21 35 44.9 4 303 25 -34 0 49 -34 18 5 -33 53 48 -34 25 7 0.61 146 0 0 -34 38 19 21 35 42.7 3 302 26 -34 29 42 -34 46 57 -34 22 41 -34 54 0 0.62 147 0 0 -35 7 2 21 35 41.0 2 301 27 -34 58 25 -35 15 40 -34 51 24 -35 22 42 0.63 148 0 0 -35 35 33 21 35 39.9 1 301 28 -35 26 56 -35 44 11 -35 19 56 -35 51 13 0.65 149 0 0 -36 3 53 21 35 39.4 1 300 28 -35 55 16 -36 12 30 -35 48 16 -36 19 32 0.75 Uncertainty in time = +/- 7 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 569-012887 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 54 51.2610 DE: +23 46 52.086 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 54 51.2612 DE: +23 46 52.086 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.8 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1223) Neckar asteroid class: approx. diameter [km]: 24 approx. diameter ["]: 0.017 distance from Earth [AU]: 1.90080 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#61 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): 0.019", 0.003", 81.748° remarks: * orbital elements for (1223)Neckar : Mean anomaly = 4.2353237838 deg Arg. of pericenter = 14.2726190296 deg Long. of node = 40.7974475422 deg Inclination = 2.5426810411 deg Eccentricity = 0.0621000907 Semimajor axis = 2.8711646486 AU Perihelion dist = 2.6928650636 AU Mag: H = 10.58, G = 0.15 Epoch of elements : MJD 60605.91844521 TDT (2024 Oct 22.9184) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#612023Apr24,6.79,2024,10,22,22.042735,-0.099961,-0.454519,-1.927173,0.422273,-0.004102,-0.000537,0.000001,0.000000 71.6291,23.8222,-154.56,-11.47,False UCAC4 569-012887,4.91423916,23.7811349,12.22,11.75,11.50,0.0,0,,4.93955439,23.8221817,3.26,3.08,0,0,0 1223,Neckar,14.96,23.742,1.9008,0,0,-0.650,1.95,,1.6,0 0,4.0493,2024,10,22,14.2726,40.7974,2.5427,0.06210,2.87116,2.69287,10.57,5.0,0.15 1.407,0.0187,0.0027,82,0.0070,Known errors,1.36,0,-1,-1 20241022_012887,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org