IOTA/IOTA-ES occultation update for (376) Geometria / UCAC4 355-191079 event on 2024 Nov 17, 23:59 UT Visible from Summary ------- On 2024 Nov 17 UT, the 35.634735393233 km diameter asteroid (376) Geometria will occult a 11.2 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 3.00 mag to 14.08 mag (the magnitude of the asteroid) for at most 1.000 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 Nov 17, 23:56 - 2024 Nov 18, 00:02 * geocentric midpoint of event [JD]: 2460632.49970880 * magnitude of target star: 11.15 * magnitude drop [mag]: 3.00 * estimated maximum duration [s]: 1.000 * Moon: 93 % sunlit, 147° distance * Sun: 61° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 36 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.003", 74°) * approx speed of asteroid's shadow [km/s]: 35.6488 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 355-191079 by 376 Geometria on 2024 Nov 17 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 148 0 0 -13 56 50 23 56 36.1 1 110 62 -14 7 8 -13 46 31 -14 9 52 -13 43 48 .... 149 0 0 -14 17 33 23 56 36.1 2 109 63 -14 27 50 -14 7 15 -14 30 34 -14 4 32 0.09 150 0 0 -14 37 58 23 56 36.3 3 109 64 -14 48 15 -14 27 41 -14 50 58 -14 24 58 0.06 151 0 0 -14 58 6 23 56 36.4 4 109 65 -15 8 22 -14 47 50 -15 11 5 -14 45 7 0.05 152 0 0 -15 17 56 23 56 36.7 5 109 66 -15 28 11 -15 7 41 -15 30 54 -15 4 58 0.04 153 0 0 -15 37 28 23 56 37.0 6 108 67 -15 47 42 -15 27 14 -15 50 24 -15 24 31 0.04 154 0 0 -15 56 41 23 56 37.3 7 108 68 -16 6 54 -15 46 28 -16 9 37 -15 43 46 0.04 155 0 0 -16 15 36 23 56 37.7 8 108 69 -16 25 48 -16 5 23 -16 28 30 -16 2 41 0.03 156 0 0 -16 34 11 23 56 38.2 9 107 70 -16 44 23 -16 24 0 -16 47 4 -16 21 18 0.03 157 0 0 -16 52 27 23 56 38.7 10 107 71 -17 2 38 -16 42 17 -17 5 19 -16 39 35 0.03 158 0 0 -17 10 24 23 56 39.2 11 107 72 -17 20 34 -17 0 14 -17 23 15 -16 57 33 0.03 159 0 0 -17 28 1 23 56 39.8 12 107 73 -17 38 9 -17 17 52 -17 40 50 -17 15 11 0.03 160 0 0 -17 45 18 23 56 40.5 13 106 74 -17 55 25 -17 35 10 -17 58 6 -17 32 29 0.03 161 0 0 -18 2 14 23 56 41.2 14 106 75 -18 12 21 -17 52 7 -18 15 2 -17 49 27 0.03 162 0 0 -18 18 50 23 56 42.0 15 106 76 -18 28 56 -18 8 44 -18 31 37 -18 6 4 0.03 163 0 0 -18 35 6 23 56 42.8 16 105 77 -18 45 11 -18 25 1 -18 47 51 -18 22 21 0.03 164 0 0 -18 51 1 23 56 43.7 17 105 78 -19 1 5 -18 40 57 -19 3 45 -18 38 17 0.03 165 0 0 -19 6 34 23 56 44.6 18 105 78 -19 16 38 -18 56 31 -19 19 17 -18 53 52 0.03 166 0 0 -19 21 47 23 56 45.5 19 104 79 -19 31 49 -19 11 45 -19 34 29 -19 9 5 0.03 167 0 0 -19 36 38 23 56 46.5 20 104 80 -19 46 40 -19 26 37 -19 49 19 -19 23 58 0.02 168 0 0 -19 51 8 23 56 47.6 21 104 81 -20 1 9 -19 41 8 -20 3 48 -19 38 29 0.02 169 0 0 -20 5 17 23 56 48.7 22 103 82 -20 15 16 -19 55 17 -20 17 55 -19 52 38 0.02 170 0 0 -20 19 3 23 56 49.8 23 103 83 -20 29 2 -20 9 4 -20 31 41 -20 6 26 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3 1 58 2 38 3 3 4 45 0.03 - 55 0 0 3 17 0 0 2 19.5 + 23 248 -38 3 6 27 3 27 33 3 3 40 3 30 21 0.03 - 54 0 0 3 42 30 0 2 20.8 + 22 248 -39 3 31 57 3 53 2 3 29 10 3 55 50 0.03 - 53 0 0 4 7 52 0 2 22.0 + 21 248 -40 3 57 19 4 18 24 3 54 32 4 21 11 0.03 - 52 0 0 4 33 6 0 2 23.2 + 20 248 -41 4 22 34 4 43 37 4 19 47 4 46 25 0.03 - 51 0 0 4 58 11 0 2 24.3 + 19 248 -42 4 47 40 5 8 42 4 44 53 5 11 29 0.03 - 50 0 0 5 23 7 0 2 25.4 + 18 248 -43 5 12 36 5 33 38 5 9 49 5 36 25 0.03 - 49 0 0 5 47 54 0 2 26.4 + 17 248 -44 5 37 23 5 58 24 5 34 37 6 1 10 0.03 - 48 0 0 6 12 30 0 2 27.3 + 16 248 -46 6 2 0 6 22 59 5 59 13 6 25 46 0.03 - 47 0 0 6 36 55 0 2 28.2 + 14 248 -47 6 26 26 6 47 24 6 23 39 6 50 10 0.03 - 46 0 0 7 1 8 0 2 29.0 + 13 248 -48 6 50 40 7 11 37 6 47 54 7 14 23 0.03 - 45 0 0 7 25 10 0 2 29.7 + 12 249 -49 7 14 42 7 35 38 7 11 56 7 38 24 0.03 - 44 0 0 7 48 59 0 2 30.4 + 11 249 -50 7 38 32 7 59 26 7 35 46 8 2 12 0.04 - 43 0 0 8 12 36 0 2 31.0 + 10 249 -51 8 2 9 8 23 2 7 59 24 8 25 48 0.04 - 42 0 0 8 35 58 0 2 31.6 + 9 249 -52 8 25 33 8 46 24 8 22 47 8 49 9 0.04 - 41 0 0 8 59 7 0 2 32.0 + 8 249 -53 8 48 42 9 9 32 8 45 57 9 12 17 0.04 - 40 0 0 9 22 2 0 2 32.5 + 7 249 -54 9 11 38 9 32 26 9 8 53 9 35 11 0.04 - 39 0 0 9 44 41 0 2 32.8 + 6 249 -55 9 34 18 9 55 5 9 31 33 9 57 49 0.05 - 38 0 0 10 7 6 0 2 33.2 + 5 250 -56 9 56 43 10 17 28 9 53 59 10 20 13 0.05 - 37 0 0 10 29 15 0 2 33.4 + 4 250 -57 10 18 53 10 39 36 10 16 9 10 42 21 0.06 - 36 0 0 10 51 7 0 2 33.6 + 3 250 -58 10 40 47 11 1 28 10 38 2 11 4 12 0.07 - 35 0 0 11 12 44 0 2 33.7 + 2 250 -59 11 2 24 11 23 3 10 59 40 11 25 47 0.10 - 34 0 0 11 34 3 0 2 33.8 + 1 250 -60 11 23 44 11 44 22 11 21 0 11 47 6 0.22 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 355-191079 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 54 17.8231 DE: -19 11 51.305 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 54 17.8230 DE: -19 11 51.305 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.2 * B mag [mag]: 11.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (376) Geometria asteroid class: approx. diameter [km]: 36 approx. diameter ["]: 0.021 distance from Earth [AU]: 2.34760 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): 0.018", 0.003", 73.519° remarks: * orbital elements for (376)Geometria : Mean anomaly = 46.6726109543 deg Arg. of pericenter = 316.5451177883 deg Long. of node = 301.9516120456 deg Inclination = 5.4305386488 deg Eccentricity = 0.1725916647 Semimajor axis = 2.2881359207 AU Perihelion dist = 1.8932227330 AU Mag: H = 9.52, G = 0.15 Epoch of elements : MJD 60631.99970875 TDT (2024 Nov 17.9997) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1012023Apr24,1.00,2024,11,17,23.993011,0.003715,-0.017609,19.570115,4.676732,0.004678,0.000990,-0.000001,0.000000 -118.4933,-19.1336,176.40,-19.29,False UCAC4 355-191079,19.90495091,-19.1975846,11.88,11.15,10.76,0.1,0,,19.92879780,-19.1336199,3.00,2.95,0,0,0 376,Geometria,14.08,35.805,2.3476,0,0,5.174,17.53,,2.0,0 0,46.3879,2024,11,17,316.5451,301.9516,5.4305,0.17259,2.28814,1.89322,9.51,5.0,0.15 1.132,0.0180,0.0026,74,0.0028,Known errors,0.94,0,-1,-1 20241117_191079,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org