IOTA/IOTA-ES occultation update for (376) Geometria / UCAC4 330-109883 event on 2024 Sep 09, 09:08 UT Visible from Summary ------- On 2024 Sep 09 UT, the 35.6523236539758 km diameter asteroid (376) Geometria will occult a 10.3 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.96 mag to 13.20 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 Sep 09, 09:02 - 2024 Sep 09, 09:14 * geocentric midpoint of event [JD]: 2460562.88112971 * magnitude of target star: 10.31 * magnitude drop [mag]: 2.96 * estimated maximum duration [s]: 2.150 * Moon: 32 % sunlit, 30° distance * Sun: 99° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 39 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.031, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.031", 0.004", 87°) * approx speed of asteroid's shadow [km/s]: 16.6097 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 330-109883 by 376 Geometria on 2024 Sep 9 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 37 0 0 .. .. .... .. .. .. .. .. .. -28 38 43 .. .. .. -28 41 48 .. .. .. .... 38 0 0 -28 54 17 9 3 1.4 1 117 56 -29 6 24 -28 42 11 -29 9 30 -28 39 6 .... 39 0 0 -29 21 51 9 3 1.6 2 117 55 -29 33 58 -29 9 44 -29 37 3 -29 6 40 0.44 40 0 0 -29 49 16 9 3 1.9 3 116 55 -30 1 23 -29 37 10 -30 4 28 -29 34 5 0.46 41 0 0 -30 16 31 9 3 2.3 4 116 55 -30 28 38 -30 4 25 -30 31 43 -30 1 21 0.46 42 0 0 -30 43 36 9 3 2.9 5 115 54 -30 55 43 -30 31 31 -30 58 48 -30 28 27 0.46 43 0 0 -31 10 31 9 3 3.6 6 115 54 -31 22 37 -30 58 26 -31 25 42 -30 55 22 0.47 44 0 0 -31 37 13 9 3 4.3 7 114 53 -31 49 19 -31 25 9 -31 52 24 -31 22 5 0.47 45 0 0 -32 3 44 9 3 5.3 8 114 53 -32 15 49 -31 51 40 -32 18 54 -31 48 36 0.47 46 0 0 -32 30 2 9 3 6.3 9 113 52 -32 42 7 -32 17 59 -32 45 11 -32 14 55 0.47 47 0 0 -32 56 7 9 3 7.4 10 112 52 -33 8 11 -32 44 4 -33 11 15 -32 41 1 0.47 48 0 0 -33 21 57 9 3 8.6 11 112 51 -33 34 1 -33 9 55 -33 37 5 -33 6 52 0.47 49 0 0 -33 47 33 9 3 10.0 11 111 51 -33 59 36 -33 35 32 -34 2 40 -33 32 29 0.47 50 0 0 -34 12 55 9 3 11.4 12 111 50 -34 24 56 -34 0 54 -34 28 0 -33 57 51 0.47 51 0 0 -34 38 0 9 3 13.0 13 110 50 -34 50 1 -34 26 1 -34 53 4 -34 22 58 0.47 52 0 0 -35 2 50 9 3 14.6 14 110 49 -35 14 49 -34 50 51 -35 17 53 -34 47 49 0.47 53 0 0 -35 27 23 9 3 16.3 15 109 49 -35 39 21 -35 15 25 -35 42 24 -35 12 23 0.47 54 0 0 -35 51 39 9 3 18.2 16 108 48 -36 3 36 -35 39 42 -36 6 39 -35 36 40 0.47 55 0 0 -36 15 37 9 3 20.1 17 108 47 -36 27 34 -36 3 42 -36 30 36 -36 0 40 0.47 56 0 0 -36 39 18 9 3 22.1 18 107 47 -36 51 14 -36 27 24 -36 54 16 -36 24 22 0.47 57 0 0 -37 2 41 9 3 24.2 19 106 46 -37 14 35 -36 50 47 -37 17 37 -36 47 46 0.47 58 0 0 -37 25 45 9 3 26.4 20 106 46 -37 37 38 -37 13 53 -37 40 39 -37 10 52 0.47 59 0 0 -37 48 30 9 3 28.6 21 105 45 -38 0 22 -37 36 39 -38 3 23 -37 33 39 0.47 60 0 0 -38 10 56 9 3 31.0 21 104 44 -38 22 46 -37 59 6 -38 25 47 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-72 -23 35 48 -23 11 36 -23 38 53 -23 8 32 0.50 -137 0 0 -22 54 57 9 14 25.9 13 249 -72 -23 7 3 -22 42 52 -23 10 8 -22 39 48 0.51 -136 0 0 -22 26 15 9 14 27.7 12 249 -72 -22 38 20 -22 14 11 -22 41 25 -22 11 7 0.51 -135 0 0 -21 57 35 9 14 29.3 11 248 -73 -22 9 40 -21 45 32 -22 12 44 -21 42 28 0.51 -134 0 0 -21 28 59 9 14 30.8 10 248 -73 -21 41 3 -21 16 56 -21 44 7 -21 13 53 0.52 -133 0 0 -21 0 27 9 14 32.1 9 248 -73 -21 12 30 -20 48 25 -21 15 34 -20 45 22 0.52 -132 0 0 -20 32 0 9 14 33.3 8 247 -73 -20 44 2 -20 20 0 -20 47 6 -20 16 56 0.53 -131 0 0 -20 3 39 9 14 34.3 7 247 -73 -20 15 41 -19 51 40 -20 18 44 -19 48 37 0.53 -130 0 0 -19 35 25 9 14 35.3 6 247 -73 -19 47 25 -19 23 27 -19 50 29 -19 20 24 0.54 -129 0 0 -19 7 19 9 14 36.0 5 246 -73 -19 19 18 -18 55 21 -19 22 21 -18 52 19 0.56 -128 0 0 -18 39 21 9 14 36.7 4 246 -72 -18 51 18 -18 27 24 -18 54 21 -18 24 22 0.58 -127 0 0 -18 11 31 9 14 37.2 3 246 -72 -18 23 28 -17 59 36 -18 26 31 -17 56 34 0.62 -126 0 0 -17 43 52 9 14 37.5 2 245 -72 -17 55 48 -17 31 58 -17 58 50 -17 28 56 0.69 -125 0 0 -17 16 23 9 14 37.7 1 245 -71 -17 28 18 -17 4 30 -17 31 20 -17 1 29 0.94 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.5 Data for the target star ------------------------ * name: UCAC4 330-109883 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 41 12.0447 DE: -24 03 05.977 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 41 12.0444 DE: -24 03 05.977 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.3 * B mag [mag]: 10.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (376) Geometria asteroid class: approx. diameter [km]: 36 approx. diameter ["]: 0.032 distance from Earth [AU]: 1.52600 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#101 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): 0.031", 0.004", 87.033° remarks: * orbital elements for (376)Geometria : Mean anomaly = 26.8366359886 deg Arg. of pericenter = 316.5570844922 deg Long. of node = 301.9513875095 deg Inclination = 5.4303994767 deg Eccentricity = 0.1726323719 Semimajor axis = 2.2882782376 AU Perihelion dist = 1.8932473378 AU Mag: H = 9.52, G = 0.15 Epoch of elements : MJD 60562.38112933 TDT (2024 Sep 09.3811) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1012023Apr24,2.15,2024,9,9,9.147113,0.047432,-0.417645,9.315994,1.049802,0.005078,-0.000141,0.000000,0.000000 139.5602,-24.0652,42.10,5.06,False UCAC4 330-109883,17.68667911,-24.0516604,10.76,10.31,10.07,0.1,0,,17.71185499,-24.0651729,2.96,2.77,0,0,0 376,Geometria,13.20,35.763,1.5260,0,0,3.921,6.05,,2.0,0 0,26.7281,2024,9,9,316.5571,301.9514,5.4304,0.17263,2.28828,1.89325,9.51,5.0,0.15 1.127,0.0307,0.0037,87,0.0041,Known errors,0.65,0,-1,-1 20240909_109883,60140.55 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:12 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org