IOTA/IOTA-ES occultation update for (1038) Tuckia / UCAC4 304-166435 event on 2024 Oct 30, 12:43 UT Visible from Summary ------- On 2024 Oct 30 UT, the 55.7138828834547 km diameter asteroid (1038) Tuckia will occult a 11.4 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.96 mag to 17.32 mag (the magnitude of the asteroid) for at most 1.700 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 Oct 30, 12:40 - 2024 Oct 30, 12:46 * geocentric midpoint of event [JD]: 2460614.03019654 * magnitude of target star: 11.36 * magnitude drop [mag]: 5.96 * estimated maximum duration [s]: 1.700 * Moon: 4 % sunlit, 75° distance * Sun: 53° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 57 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 94°) * approx speed of asteroid's shadow [km/s]: 32.9921 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 304-166435 by 1038 Tuckia on 2024 Oct 30 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 - 44 0 0 6 2 1 12 40 17.9 1 120 54 5 44 25 6 19 38 5 40 38 6 23 26 .... - 43 0 0 5 28 14 12 40 18.0 2 120 55 5 10 38 5 45 50 5 6 51 5 49 37 -0.02 - 42 0 0 4 54 29 12 40 18.2 3 120 57 4 36 54 5 12 5 4 33 7 5 15 52 -0.06 - 41 0 0 4 20 49 12 40 18.4 4 120 58 4 3 15 4 38 24 3 59 28 4 42 11 -0.08 - 40 0 0 3 47 14 12 40 18.8 6 120 59 3 29 41 4 4 48 3 25 55 4 8 35 -0.10 - 39 0 0 3 13 46 12 40 19.2 7 120 60 2 56 14 3 31 19 2 52 28 3 35 6 -0.10 - 38 0 0 2 40 26 12 40 19.7 8 120 61 2 22 55 2 57 57 2 19 8 3 1 44 -0.11 - 37 0 0 2 7 13 12 40 20.2 9 120 62 1 49 43 2 24 44 1 45 58 2 28 30 -0.11 - 36 0 0 1 34 10 12 40 20.9 10 120 63 1 16 42 1 51 40 1 12 56 1 55 26 -0.12 - 35 0 0 1 1 18 12 40 21.6 11 120 64 0 43 51 1 18 46 0 40 5 1 22 32 -0.12 - 34 0 0 0 28 37 12 40 22.4 12 120 66 0 11 11 0 46 3 0 7 26 0 49 49 -0.12 - 33 0 0 - 0 3 52 12 40 23.3 14 120 67 - 0 21 17 0 13 33 - 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time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 304-166435 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 02 10.0966 DE: -29 12 58.512 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 02 10.0966 DE: -29 12 58.512 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.4 * B mag [mag]: 12.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1038) Tuckia asteroid class: approx. diameter [km]: 56 approx. diameter ["]: 0.019 distance from Earth [AU]: 4.13800 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): 0.013", 0.002", 94.328° remarks: * orbital elements for (1038)Tuckia : Mean anomaly = 304.5961075251 deg Arg. of pericenter = 305.3399019381 deg Long. of node = 57.6975157919 deg Inclination = 9.1873953442 deg Eccentricity = 0.2218396958 Semimajor axis = 3.9784562315 AU Perihelion dist = 3.0958767114 AU Mag: H = 10.69, G = 0.15 Epoch of elements : MJD 60613.53019620 TDT (2024 Oct 30.5302) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.70,2024,10,30,12.724717,-0.003094,0.144768,18.619292,0.298443,0.004827,-0.000330,-0.000001,0.000000 40.7362,-29.2175,-14.96,-14.04,False UCAC4 304-166435,18.03613799,-29.2162533,12.46,11.36,10.77,0.1,0,,18.06217216,-29.2175402,5.96,6.10,0,0,0 1038,Tuckia,17.32,56.014,4.1380,0,0,3.022,0.64,,6.2,0 0,304.5303,2024,10,30,305.3399,57.6975,9.1874,0.22184,3.97846,3.09588,10.68,5.0,0.15 1.108,0.0133,0.0016,94,0.0020,Known errors,0.53,0,-1,-1 20241030_166435,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org