IOTA/IOTA-ES occultation update for (561) Ingwelde / UCAC4 377-068866 event on 2024 Jun 03, 11:00 UT Visible from Summary ------- On 2024 Jun 03 UT, the 27.0181833134133 km diameter asteroid (561) Ingwelde will occult a 11.5 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.84 mag to 16.34 mag (the magnitude of the asteroid) for at most 2.660 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 Jun 03, 10:51 - 2024 Jun 03, 11:09 * geocentric midpoint of event [JD]: 2460464.95889779 * magnitude of target star: 11.51 * magnitude drop [mag]: 4.84 * estimated maximum duration [s]: 2.660 * Moon: 12 % sunlit, 166° distance * Sun: 153° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.002", 105°) * approx speed of asteroid's shadow [km/s]: 10.2379 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 377-068866 by 561 Ingwelde on 2024 Jun 3 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 71 0 0 -16 0 53 11 9 42.0 1 105 21 -15 52 0 -16 9 47 -15 49 30 -16 12 19 .... 72 0 0 -16 17 10 11 9 41.7 2 105 20 -16 8 16 -16 26 4 -16 5 45 -16 28 36 0.48 73 0 0 -16 33 45 11 9 41.2 3 105 19 -16 24 50 -16 42 40 -16 22 19 -16 45 12 0.52 74 0 0 -16 50 38 11 9 40.5 4 104 18 -16 41 43 -16 59 35 -16 39 12 -17 2 7 0.54 75 0 0 -17 7 50 11 9 39.6 5 104 17 -16 58 54 -17 16 47 -16 56 23 -17 19 19 0.55 76 0 0 -17 25 20 11 9 38.5 6 104 16 -17 16 23 -17 34 18 -17 13 51 -17 36 50 0.56 77 0 0 -17 43 7 11 9 37.2 7 103 15 -17 34 9 -17 52 5 -17 31 37 -17 54 38 0.56 78 0 0 -18 1 10 11 9 35.6 8 103 14 -17 52 12 -18 10 10 -17 49 40 -18 12 42 0.57 79 0 0 -18 19 31 11 9 33.8 9 103 13 -18 10 31 -18 28 31 -18 7 59 -18 31 4 0.57 80 0 0 -18 38 7 11 9 31.8 10 102 12 -18 29 7 -18 47 8 -18 26 34 -18 49 41 0.57 81 0 0 -18 56 58 11 9 29.6 11 102 11 -18 47 58 -19 6 0 -18 45 25 -19 8 34 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0 0 -50 43 36 10 52 56.7 23 275 -46 -50 34 54 -50 52 18 -50 32 27 -50 54 46 0.61 -119 0 0 -50 36 46 10 52 53.5 23 274 -45 -50 28 4 -50 45 29 -50 25 36 -50 47 57 0.61 -118 0 0 -50 29 39 10 52 50.5 22 273 -45 -50 20 56 -50 38 23 -50 18 29 -50 40 51 0.61 -117 0 0 -50 22 16 10 52 47.4 21 272 -44 -50 13 33 -50 31 0 -50 11 5 -50 33 29 0.61 -116 0 0 -50 14 36 10 52 44.5 21 272 -44 -50 5 52 -50 23 21 -50 3 24 -50 25 50 0.61 -115 0 0 -50 6 40 10 52 41.6 20 271 -43 -49 57 55 -50 15 25 -49 55 27 -50 17 54 0.61 -114 0 0 -49 58 27 10 52 38.8 19 270 -43 -49 49 41 -50 7 13 -49 47 13 -50 9 42 0.61 -113 0 0 -49 49 57 10 52 36.1 19 269 -42 -49 41 11 -49 58 44 -49 38 42 -50 1 13 0.61 -112 0 0 -49 41 10 10 52 33.4 18 268 -41 -49 32 24 -49 49 58 -49 29 55 -49 52 27 0.61 -111 0 0 -49 32 7 10 52 30.9 17 268 -41 -49 23 20 -49 40 55 -49 20 50 -49 43 25 0.61 -110 0 0 -49 22 47 10 52 28.4 17 267 -40 -49 13 59 -49 31 35 -49 11 29 -49 34 5 0.61 -109 0 0 -49 13 9 10 52 25.9 16 266 -40 -49 4 21 -49 21 59 -49 1 51 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-46 43 51 -47 6 54 0.64 - 96 0 0 -46 42 0 10 52 2.5 7 256 -31 -46 33 1 -46 51 1 -46 30 29 -46 53 34 0.64 - 95 0 0 -46 28 21 10 52 1.4 7 256 -31 -46 19 21 -46 37 22 -46 16 48 -46 39 56 0.64 - 94 0 0 -46 14 25 10 52 0.4 6 255 -30 -46 5 24 -46 23 27 -46 2 51 -46 26 0 0.65 - 93 0 0 -46 0 11 10 51 59.5 5 254 -29 -45 51 9 -46 9 14 -45 48 36 -46 11 48 0.66 - 92 0 0 -45 45 40 10 51 58.7 4 253 -29 -45 36 37 -45 54 44 -45 34 4 -45 57 18 0.67 - 91 0 0 -45 30 51 10 51 58.1 4 253 -28 -45 21 48 -45 39 56 -45 19 14 -45 42 30 0.69 - 90 0 0 -45 15 45 10 51 57.5 3 252 -27 -45 6 41 -45 24 51 -45 4 7 -45 27 25 0.72 - 89 0 0 -45 0 22 10 51 57.1 2 251 -26 -44 51 17 -45 9 29 -44 48 43 -45 12 3 0.76 - 88 0 0 -44 44 42 10 51 56.8 1 251 -26 -44 35 36 -44 53 49 -44 33 1 -44 56 24 0.85 - 87 0 0 -44 28 44 10 51 56.6 1 250 -25 -44 19 37 -44 37 52 -44 17 3 -44 40 28 1.19 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: UCAC4 377-068866 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 56 23.9126 DE: -14 36 48.265 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 56 23.9126 DE: -14 36 48.265 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.5 * B mag [mag]: 12.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (561) Ingwelde asteroid class: approx. diameter [km]: 27 approx. diameter ["]: 0.016 distance from Earth [AU]: 2.36900 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 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): 0.021", 0.002", 104.6° remarks: * orbital elements for (561)Ingwelde : Mean anomaly = 103.3139676255 deg Arg. of pericenter = 318.4124536571 deg Long. of node = 159.1382565945 deg Inclination = 1.5492614634 deg Eccentricity = 0.1229238188 Semimajor axis = 3.1712676156 AU Perihelion dist = 2.7814432898 AU Mag: H = 11.31, G = 0.15 Epoch of elements : MJD 60464.45889766 TDT (2024 Jun 03.4589) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr24,2.66,2024,6,3,11.013547,-0.132171,-0.499430,-5.586285,1.478143,0.002420,-0.000912,0.000001,0.000000 166.8440,-14.7134,14.36,22.40,False UCAC4 377-068866,14.93997574,-14.6134069,12.24,11.51,11.12,0.1,0,,14.96271180,-14.7133879,4.85,4.79,0,0,0 561,Ingwelde,16.34,27.190,2.3690,0,0,-1.429,5.49,,1.8,0 0,103.2339,2024,6,3,318.4125,159.1383,1.5493,0.12292,3.17127,2.78144,11.31,5.0,0.15 1.142,0.0207,0.0022,105,0.0022,Known errors,1.04,0,-1,-1 20240603_068866,60139.37 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 08:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org