IOTA/IOTA-ES occultation update for (4749) Ledzeppelin / UCAC4 316-168309 event on 2024 Oct 11, 16:46 UT Visible from Summary ------- On 2024 Oct 11 UT, the 14.3681396182909 km diameter asteroid (4749) Ledzeppelin will occult a 11.8 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 5.95 mag to 17.78 mag (the magnitude of the asteroid) for at most 0.620 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 11, 16:41 - 2024 Oct 11, 16:51 * geocentric midpoint of event [JD]: 2460595.19893692 * magnitude of target star: 11.83 * magnitude drop [mag]: 5.95 * estimated maximum duration [s]: 0.620 * Moon: 60 % sunlit, 26° distance * Sun: 75° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.002", 100°) * approx speed of asteroid's shadow [km/s]: 23.6544 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 316-168309 by 4749 Ledzeppelin on 2024 Oct 11 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 - 87 0 0 - 2 47 42 16 41 59.5 1 117 76 - 2 52 10 - 2 43 14 - 2 55 47 - 2 39 36 .... - 86 0 0 - 3 18 31 16 41 59.7 2 117 77 - 3 22 59 - 3 14 3 - 3 26 37 - 3 10 25 0.14 - 85 0 0 - 3 49 23 16 41 59.9 3 117 78 - 3 53 51 - 3 44 55 - 3 57 29 - 3 41 17 0.12 - 84 0 0 - 4 20 16 16 42 0.3 4 117 79 - 4 24 44 - 4 15 48 - 4 28 22 - 4 12 10 0.11 - 83 0 0 - 4 51 10 16 42 0.7 5 117 81 - 4 55 38 - 4 46 42 - 4 59 16 - 4 43 4 0.11 - 82 0 0 - 5 22 4 16 42 1.3 7 117 82 - 5 26 32 - 5 17 36 - 5 30 11 - 5 13 58 0.11 - 81 0 0 - 5 52 57 16 42 2.0 8 116 83 - 5 57 26 - 5 48 29 - 6 1 4 - 5 44 51 0.10 - 80 0 0 - 6 23 49 16 42 2.7 9 116 84 - 6 28 17 - 6 19 21 - 6 31 55 - 6 15 43 0.10 - 79 0 0 - 6 54 37 16 42 3.6 10 116 85 - 6 59 5 - 6 50 9 - 7 2 43 - 6 46 31 0.10 - 78 0 0 - 7 25 22 16 42 4.6 11 116 86 - 7 29 50 - 7 20 54 - 7 33 28 - 7 17 16 0.10 - 77 0 0 - 7 56 3 16 42 5.6 12 116 87 - 8 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0 - 6 1 27 16 50 57.0 0 243 -73 - 6 5 55 - 5 56 59 - 6 9 33 - 5 53 21 2.05 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 316-168309 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 16 43.8802 DE: -26 58 24.245 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 16 43.8802 DE: -26 58 24.245 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.8 * B mag [mag]: 12.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4749) Ledzeppelin asteroid class: approx. diameter [km]: 14 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.05900 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 25 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): 0.015", 0.002", 99.721° remarks: * orbital elements for (4749)Ledzeppelin : Mean anomaly = 283.9787897748 deg Arg. of pericenter = 287.7389833004 deg Long. of node = 92.8910312283 deg Inclination = 10.7747971474 deg Eccentricity = 0.1010750232 Semimajor axis = 3.0097640311 AU Perihelion dist = 2.7055520620 AU Mag: H = 12.02, G = 0.15 Epoch of elements : MJD 60594.69893662 TDT (2024 Oct 11.6989) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr25,0.62,2024,10,11,16.774486,-0.003265,-0.080799,13.342886,-0.471669,0.005609,0.000086,0.000000,0.000000 2.1858,-26.9659,-74.97,-7.39,False UCAC4 316-168309,18.27885564,-26.9734013,12.94,11.83,11.23,0.1,0,,18.30452591,-26.9659056,5.95,6.10,0,0,0 4749,Ledzeppelin,17.78,14.590,3.0590,0,0,2.870,-1.36,,1.4,0 0,283.8469,2024,10,11,287.7390,92.8910,10.7748,0.10108,3.00976,2.70555,12.02,5.0,0.15 1.407,0.0150,0.0018,100,0.0027,Known errors,0.69,0,-1,-1 20241011_168309,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org