IOTA/IOTA-ES occultation update for (1320) Impala / TYC 2430-01158-1 event on 2024 Dec 27, 18:00 UT Visible from Summary ------- On 2024 Dec 27 UT, the 38.453 km diameter asteroid (1320) Impala will occult a 10.8 mag star in the constellation Auriga for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.43 mag to 16.25 mag (the magnitude of the asteroid) for at most 2.150 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 27, 17:56 - 2024 Dec 27, 18:05 * geocentric midpoint of event [JD]: 2460672.25063016 * magnitude of target star: 10.83 * magnitude drop [mag]: 5.43 * estimated maximum duration [s]: 2.150 * Moon: 11 % sunlit, 142° distance * Sun: 168° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 48 * 1 sigma uncertainty interval [path widths]: +/- 0.31 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.003", 78°) * approx speed of asteroid's shadow [km/s]: 17.8844 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2430-01158-1 by 1320 Impala on 2024 Dec 27 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 - 38 0 0 .. .. .... .. .. .. .. .. .. 41 39 0 .. .. .. 41 51 14 .. .. .. .... - 37 0 0 42 11 43 18 5 39.8 1 41 8 42 31 37 41 51 57 42 43 55 41 39 52 .... - 36 0 0 43 3 52 18 5 39.5 2 42 7 43 23 49 42 44 2 43 36 9 42 31 55 -0.66 - 35 0 0 43 55 32 18 5 39.1 3 43 6 44 15 33 43 35 38 44 27 55 43 23 29 -0.68 - 34 0 0 44 46 41 18 5 38.5 4 43 4 45 6 45 44 26 45 45 19 9 44 14 34 -0.69 - 33 0 0 45 37 16 18 5 37.7 6 44 3 45 57 23 45 17 18 46 9 48 45 5 6 -0.70 - 32 0 0 46 27 16 18 5 36.8 7 45 2 46 47 25 46 7 16 46 59 51 45 55 2 -0.71 - 31 0 0 47 16 37 18 5 35.7 8 46 1 47 36 48 46 56 35 47 49 15 46 44 21 -0.71 - 30 0 0 48 5 18 18 5 34.5 9 46 0 48 25 29 47 45 15 48 37 57 47 33 0 -0.72 - 29 0 0 48 53 16 18 5 33.2 10 47 -1 49 13 27 48 33 12 49 25 56 48 20 57 -0.72 - 28 0 0 49 40 29 18 5 31.8 11 48 -2 50 0 40 49 20 25 50 13 9 49 8 10 -0.72 - 27 0 0 50 26 55 18 5 30.2 12 49 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28 27 24 27 51 32 28 38 29 27 40 36 -0.76 180 0 0 27 18 10 17 56 27.1 16 301 -11 27 36 1 27 0 25 27 47 1 26 49 34 -0.77 -179 0 0 26 27 19 17 56 24.5 15 302 -10 26 45 1 26 9 41 26 55 57 25 58 55 -0.77 -178 0 0 25 36 52 17 56 22.1 14 302 -9 25 54 27 25 19 23 26 5 18 25 8 41 -0.77 -177 0 0 24 46 54 17 56 19.9 13 303 -8 25 4 21 24 29 32 25 15 7 24 18 55 -0.78 -176 0 0 23 57 25 17 56 17.9 12 303 -7 24 14 44 23 40 11 24 25 25 23 29 38 -0.78 -175 0 0 23 8 28 17 56 16.0 10 303 -6 23 25 39 22 51 21 23 36 15 22 40 54 -0.79 -174 0 0 22 20 4 17 56 14.4 9 304 -5 22 37 7 22 3 5 22 47 38 21 52 42 -0.80 -173 0 0 21 32 15 17 56 13.0 8 304 -3 21 49 11 21 15 24 21 59 37 21 5 6 -0.81 -172 0 0 20 45 3 17 56 11.7 7 305 -2 21 1 51 20 28 20 21 12 12 20 18 6 -0.82 -171 0 0 19 58 30 17 56 10.7 6 305 -1 20 15 10 19 41 54 20 25 26 19 31 45 -0.85 -170 0 0 19 12 36 17 56 9.9 4 305 0 19 29 8 18 56 8 19 39 20 18 46 4 -0.88 -169 0 0 18 27 24 17 56 9.2 3 306 1 18 43 49 18 11 3 18 53 56 18 1 3 -0.93 -168 0 0 17 42 54 17 56 8.8 2 306 2 17 59 11 17 26 41 18 9 14 17 16 45 -1.06 -167 0 0 16 59 8 17 56 8.6 1 306 4 17 15 18 16 43 2 17 25 15 16 33 11 -1.54 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: TYC 2430-01158-1 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 28 50.2363 DE: +34 48 01.773 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 28 50.2363 DE: +34 48 01.774 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.8 * B mag [mag]: 11.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1320) Impala asteroid class: approx. diameter [km]: 38 approx. diameter ["]: 0.019 distance from Earth [AU]: 2.72030 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 date of fit: 2023 Apr 27 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): 0.011", 0.003", 77.554° remarks: * orbital elements for (1320)Impala : Mean anomaly = 178.4215498949 deg Arg. of pericenter = 206.6716366811 deg Long. of node = 71.7467640010 deg Inclination = 19.8640745234 deg Eccentricity = 0.2344259612 Semimajor axis = 2.9887151287 AU Perihelion dist = 2.2880827119 AU Mag: H = 10.93, G = 0.15 Epoch of elements : MJD 60671.75063208 TDT (2024 Dec 27.7506) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr27,2.15,2024,12,27,18.015124,0.170392,0.572302,-9.674835,2.880196,-0.000074,-0.001220,0.000002,0.000000 90.6945,34.7846,-89.87,-23.28,False TYC 2430-01158-1,6.48062120,34.8004925,10.98,10.83,10.75,0.0,0,,6.50882893,34.7845701,5.42,5.06,0,0,0 1320,Impala,16.25,38.453,2.7203,0,0,-2.538,9.31,,2.2,0 0,178.2784,2024,12,27,206.6716,71.7468,19.8641,0.23443,2.98872,2.28808,10.93,5.0,0.15 1.307,0.0113,0.0027,78,0.0060,Known errors,0.97,0,-1,-1 20241227_1158-1,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org