IOTA/IOTA-ES occultation update for (762) Pulcova / UCAC4 297-205625 event on 2024 Jul 09, 21:28 UT Visible from Summary ------- On 2024 Jul 09 UT, the 140.038 km diameter asteroid (762) Pulcova 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 2.14 mag to 13.17 mag (the magnitude of the asteroid) for at most 9.720 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 Jul 09, 21:20 - 2024 Jul 09, 21:35 * geocentric midpoint of event [JD]: 2460501.39461596 * magnitude of target star: 11.19 * magnitude drop [mag]: 2.14 * estimated maximum duration [s]: 9.720 * Moon: 15 % sunlit, 127° distance * Sun: 169° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 141 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.002", 74°) * approx speed of asteroid's shadow [km/s]: 14.4069 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 297-205625 by 762 Pulcova #1 on 2024 Jul 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 - 59 0 0 2 57 36 21 35 34.3 0 121 7 .. .. .. 2 13 8 .. .. .. 2 1 15 .... - 58 0 0 2 21 39 21 35 34.2 1 121 6 3 6 7 1 37 6 3 17 59 1 25 12 0.18 - 57 0 0 1 45 27 21 35 33.9 3 121 5 2 29 59 1 0 50 2 41 52 0 48 55 0.15 - 56 0 0 1 9 1 21 35 33.4 4 121 4 1 53 38 0 24 20 2 5 32 0 12 24 0.13 - 55 0 0 0 32 23 21 35 32.7 5 121 2 1 17 4 - 0 12 22 1 28 59 - 0 24 19 0.13 - 54 0 0 - 0 4 27 21 35 31.8 6 121 1 0 40 17 - 0 49 15 0 52 13 - 1 1 14 0.12 - 53 0 0 - 0 41 27 21 35 30.8 7 121 0 0 3 20 - 1 26 19 0 15 17 - 1 38 18 0.12 - 52 0 0 - 1 18 36 21 35 29.6 8 121 -1 - 0 33 46 - 2 3 31 - 0 21 48 - 2 15 31 0.12 - 51 0 0 - 1 55 54 21 35 28.1 10 121 -2 - 1 11 1 - 2 40 51 - 0 59 2 - 2 52 52 0.12 - 50 0 0 - 2 33 18 21 35 26.5 11 121 -3 - 1 48 23 - 3 18 18 - 1 36 24 - 3 30 20 0.11 - 49 0 0 - 3 10 48 21 35 24.7 12 121 -4 - 2 25 51 - 3 55 50 - 2 13 51 - 4 7 53 0.11 - 48 0 0 - 3 48 23 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9 -20 8 29 -21 59 55 0.12 122 0 0 -20 31 42 21 21 3.3 11 241 -16 -19 47 40 -21 15 49 -19 35 55 -21 27 36 0.13 123 0 0 -19 58 51 21 21 1.8 10 241 -15 -19 14 42 -20 43 4 -19 2 55 -20 54 53 0.13 124 0 0 -19 25 35 21 21 0.5 9 240 -13 -18 41 20 -20 9 54 -18 29 32 -20 21 44 0.13 125 0 0 -18 51 55 21 20 59.3 7 240 -12 -18 7 34 -19 36 19 -17 55 45 -19 48 12 0.14 126 0 0 -18 17 51 21 20 58.2 6 240 -11 -17 33 25 -19 2 22 -17 21 34 -19 14 16 0.14 127 0 0 -17 43 25 21 20 57.3 5 240 -10 -16 58 54 -18 28 1 -16 47 1 -18 39 56 0.15 128 0 0 -17 8 38 21 20 56.6 4 239 -9 -16 24 1 -17 53 18 -16 12 7 -18 5 15 0.16 129 0 0 -16 33 29 21 20 56.1 3 239 -8 -15 48 47 -17 18 14 -15 36 52 -17 30 12 0.18 130 0 0 -15 57 59 21 20 55.7 2 239 -7 -15 13 13 -16 42 50 -15 1 17 -16 54 49 0.23 131 0 0 -15 22 11 21 20 55.5 1 238 -6 -14 37 20 -16 7 6 -14 25 22 -16 19 6 0.40 132 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -15 31 3 .. .. .. -15 43 4 .... Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 297-205625 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 43 08.4907 DE: -30 38 32.126 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 43 08.4907 DE: -30 38 32.126 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.2 * B mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (762) Pulcova asteroid class: asteroid system: multiple bodies approx. diameter [km]: 140 approx. diameter ["]: 0.080 distance from Earth [AU]: 2.42410 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#127 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): 0.024", 0.002", 74.28° remarks: * orbital elements for (762)Pulcova : Mean anomaly = 140.0215692824 deg Arg. of pericenter = 188.6202117014 deg Long. of node = 305.5146100122 deg Inclination = 13.0994512127 deg Eccentricity = 0.1073362091 Semimajor axis = 3.1540366404 AU Perihelion dist = 2.8154943042 AU Mag: H = 8.25, G = 0.15 Epoch of elements : MJD 60500.89461617 TDT (2024 Jul 09.8946) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1272023Apr24 Binary solution 1 : Kepler,9.72,2024,7,9,21.470783,-0.021734,-0.117980,-7.996847,1.474636,0.000800,0.000804,0.000001,0.000000 30.8163,-30.6183,-140.71,22.21,False UCAC4 297-205625,18.71902519,-30.6422572,11.30,11.19,11.13,0.0,0,,18.74566076,-30.6183089,2.15,1.82,0,0,0 762,Pulcova #1,13.17,140.038,2.4241,0,1,-2.247,5.35,,6.0,0 ,19,703,4.438000,0.0300,,,,, 0,139.8642,2024,7,9,188.6202,305.5146,13.0995,0.10734,3.15404,2.81549,8.25,5.0,0.15 1.134,0.0237,0.0023,74,0.0106,Known errors + binary orbit,0.81,0,-1,-1 20240709_205625_Ma1,60140.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org