IOTA/IOTA-ES occultation update for (3767) DiMaggio / UCAC4 345-128028 event on 2024 Oct 02, 01:29 UT Visible from Summary ------- On 2024 Oct 02 UT, the 14.1903251334821 km diameter asteroid (3767) DiMaggio will occult a 11.1 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 5.71 mag to 16.80 mag (the magnitude of the asteroid) for at most 0.630 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 02, 01:25 - 2024 Oct 02, 01:34 * geocentric midpoint of event [JD]: 2460585.56242995 * magnitude of target star: 11.10 * magnitude drop [mag]: 5.71 * estimated maximum duration [s]: 0.630 * Moon: 0 % sunlit, 89° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 102°) * approx speed of asteroid's shadow [km/s]: 22.7269 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 345-128028 by 3767 DiMaggio on 2024 Oct 2 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 144 0 0 -14 42 28 1 25 46.1 1 112 74 -14 47 15 -14 37 41 -14 49 50 -14 35 6 .... 145 0 0 -15 6 23 1 25 46.3 2 111 74 -15 11 11 -15 1 36 -15 13 46 -14 59 1 0.47 146 0 0 -15 30 38 1 25 46.5 3 111 75 -15 35 26 -15 25 50 -15 38 2 -15 23 14 0.49 147 0 0 -15 55 11 1 25 46.9 4 111 75 -16 0 0 -15 50 22 -16 2 36 -15 47 46 0.51 148 0 0 -16 20 2 1 25 47.4 5 111 75 -16 24 51 -16 15 12 -16 27 28 -16 12 36 0.51 149 0 0 -16 45 10 1 25 47.9 6 110 75 -16 50 0 -16 40 20 -16 52 37 -16 37 44 0.52 150 0 0 -17 10 35 1 25 48.6 7 110 75 -17 15 26 -17 5 44 -17 18 3 -17 3 8 0.52 151 0 0 -17 36 16 1 25 49.4 8 110 75 -17 41 7 -17 31 25 -17 43 45 -17 28 48 0.52 152 0 0 -18 2 12 1 25 50.3 9 109 75 -18 7 4 -17 57 20 -18 9 42 -17 54 43 0.53 153 0 0 -18 28 23 1 25 51.2 10 109 75 -18 33 16 -18 23 31 -18 35 54 -18 20 53 0.53 154 0 0 -18 54 49 1 25 52.3 11 109 75 -18 59 42 -18 49 56 -19 2 20 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18 27 -40 3 19 0.60 - 22 0 0 -39 48 20 1 34 0.3 5 247 -46 -39 53 15 -39 43 24 -39 55 54 -39 40 45 0.62 - 21 0 0 -39 25 28 1 34 0.7 4 246 -47 -39 30 24 -39 20 33 -39 33 4 -39 17 53 0.63 - 20 0 0 -39 2 19 1 34 1.0 3 245 -47 -39 7 15 -38 57 23 -39 9 55 -38 54 43 0.66 - 19 0 0 -38 38 52 1 34 1.3 3 245 -47 -38 43 49 -38 33 56 -38 46 29 -38 31 16 0.70 - 18 0 0 -38 15 8 1 34 1.5 2 244 -47 -38 20 6 -38 10 11 -38 22 46 -38 7 31 0.78 - 17 0 0 -37 51 8 1 34 1.6 1 244 -48 -37 56 5 -37 46 11 -37 58 46 -37 43 30 1.04 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 345-128028 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 04 43.6630 DE: -21 09 30.552 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 04 43.6630 DE: -21 09 30.552 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.1 * B mag [mag]: 12.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3767) DiMaggio asteroid class: approx. diameter [km]: 14 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.53250 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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", 102.493° remarks: * orbital elements for (3767)DiMaggio : Mean anomaly = 80.2443785923 deg Arg. of pericenter = 74.3288022175 deg Long. of node = 122.7700176800 deg Inclination = 13.7042670288 deg Eccentricity = 0.1393622001 Semimajor axis = 2.6031963868 AU Perihelion dist = 2.2404092110 AU Mag: H = 11.64, G = 0.15 Epoch of elements : MJD 60585.06243005 TDT (2024 Oct 02.0624) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,0.63,2024,10,2,1.498319,-0.102202,-0.456869,12.520343,-2.791299,0.005643,0.000091,0.000000,0.000000 -122.1906,-21.1577,154.86,-3.71,False UCAC4 345-128028,18.07879531,-21.1584867,12.07,11.10,10.58,0.1,4,K,18.10338272,-21.1576849,5.71,5.78,0,0,0 3767,DiMaggio,16.80,14.374,2.5325,0,0,3.108,-9.69,,1.0,0 0,79.9951,2024,10,1,74.3288,122.7700,13.7043,0.13936,2.60320,2.24041,11.64,5.0,0.15 1.270,0.0133,0.0021,102,0.0021,Known errors,0.96,0,-1,-1 20241002_128028,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org