IOTA/IOTA-ES occultation update for (533) Sara / G235922.8+021718 event on 2024 Jun 15, 04:58 UT Visible from Summary ------- On 2024 Jun 15 UT, the 31.782 km diameter asteroid (533) Sara will occult a 11.8 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.77 mag to 15.53 mag (the magnitude of the asteroid) for at most 1.670 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 15, 04:52 - 2024 Jun 15, 05:03 * geocentric midpoint of event [JD]: 2460476.70712700 * magnitude of target star: 11.79 * magnitude drop [mag]: 3.77 * estimated maximum duration [s]: 1.670 * Moon: 59 % sunlit, 175° distance * Sun: 83° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.003", 76°) * approx speed of asteroid's shadow [km/s]: 19.0368 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of G235922.8+021718 by 533 Sara on 2024 Jun 15 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 - 66 0 0 -19 47 45 4 52 40.9 0 87 -82 -19 56 22 -19 39 7 -20 0 39 -19 34 51 .... - 65 0 0 -19 44 59 4 52 40.9 1 87 -82 -19 53 36 -19 36 21 -19 57 53 -19 32 4 -0.03 - 64 0 0 -19 41 51 4 52 41.1 2 87 -81 -19 50 29 -19 33 14 -19 54 46 -19 28 57 -0.02 - 63 0 0 -19 38 23 4 52 41.3 3 86 -80 -19 47 1 -19 29 45 -19 51 18 -19 25 28 -0.02 - 62 0 0 -19 34 33 4 52 41.6 4 86 -79 -19 43 11 -19 25 55 -19 47 28 -19 21 38 -0.02 - 61 0 0 -19 30 22 4 52 42.0 5 86 -78 -19 39 1 -19 21 44 -19 43 18 -19 17 27 -0.02 - 60 0 0 -19 25 51 4 52 42.6 6 85 -77 -19 34 29 -19 17 12 -19 38 46 -19 12 55 -0.02 - 59 0 0 -19 20 57 4 52 43.2 7 85 -76 -19 29 36 -19 12 19 -19 33 54 -19 8 1 -0.02 - 58 0 0 -19 15 43 4 52 43.9 8 85 -75 -19 24 22 -19 7 4 -19 28 40 -19 2 47 -0.02 - 57 0 0 -19 10 8 4 52 44.6 9 84 -74 -19 18 47 -19 1 28 -19 23 5 -18 57 11 -0.02 - 56 0 0 -19 4 11 4 52 45.5 10 84 -73 -19 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1 18 44 7 19 10 22 -0.01 73 0 0 19 8 13 5 2 46.4 36 259 60 18 59 26 19 16 59 18 55 6 19 21 19 -0.01 74 0 0 19 18 50 5 2 49.7 35 259 61 19 10 4 19 27 35 19 5 44 19 31 56 -0.01 75 0 0 19 29 6 5 2 52.9 34 259 62 19 20 21 19 37 51 19 16 1 19 42 12 -0.01 76 0 0 19 39 2 5 2 56.1 33 260 63 19 30 18 19 47 47 19 25 58 19 52 7 -0.01 77 0 0 19 48 37 5 2 59.1 32 260 64 19 39 53 19 57 21 19 35 34 20 1 41 -0.01 78 0 0 19 57 51 5 3 2.1 31 260 65 19 49 8 20 6 35 19 44 49 20 10 54 -0.01 79 0 0 20 6 45 5 3 5.0 30 261 66 19 58 2 20 15 28 19 53 43 20 19 47 -0.01 80 0 0 20 15 17 5 3 7.8 29 261 67 20 6 35 20 24 0 20 2 16 20 28 19 -0.01 81 0 0 20 23 29 5 3 10.5 28 262 68 20 14 47 20 32 11 20 10 28 20 36 29 -0.01 82 0 0 20 31 19 5 3 13.1 27 262 69 20 22 38 20 40 1 20 18 19 20 44 19 -0.01 83 0 0 20 38 48 5 3 15.6 26 262 70 20 30 7 20 47 30 20 25 49 20 51 48 -0.01 84 0 0 20 45 57 5 3 18.0 25 263 71 20 37 16 20 54 38 20 32 58 20 58 56 -0.01 85 0 0 20 52 44 5 3 20.4 25 263 72 20 44 4 21 1 25 20 39 46 21 5 43 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51 5 3 44.0 11 268 85 21 42 15 21 59 28 21 37 58 22 3 45 -0.02 100 0 0 21 52 22 5 3 45.0 10 268 85 21 43 46 22 0 59 21 39 29 22 5 16 -0.02 101 0 0 21 53 32 5 3 46.0 9 269 86 21 44 56 22 2 9 21 40 39 22 6 26 -0.02 102 0 0 21 54 21 5 3 46.8 9 269 87 21 45 45 22 2 58 21 41 28 22 7 14 -0.02 103 0 0 21 54 49 5 3 47.6 8 270 87 21 46 13 22 3 26 21 41 56 22 7 42 -0.02 104 0 0 21 54 56 5 3 48.3 7 270 88 21 46 20 22 3 33 21 42 3 22 7 49 -0.02 105 0 0 21 54 42 5 3 48.9 6 270 88 21 46 6 22 3 19 21 41 49 22 7 35 -0.02 106 0 0 21 54 8 5 3 49.4 5 271 87 21 45 31 22 2 44 21 41 15 22 7 1 -0.02 107 0 0 21 53 12 5 3 49.8 4 271 86 21 44 35 22 1 49 21 40 19 22 6 5 -0.02 108 0 0 21 51 55 5 3 50.1 3 271 86 21 43 18 22 0 32 21 39 2 22 4 49 -0.02 109 0 0 21 50 18 5 3 50.4 2 272 85 21 41 41 21 58 55 21 37 24 22 3 11 -0.03 110 0 0 21 48 20 5 3 50.5 1 272 84 21 39 42 21 56 57 21 35 26 22 1 13 -0.04 111 0 0 21 46 1 5 3 50.6 0 273 83 21 37 23 21 54 38 21 33 7 21 58 54 -0.16 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: G235922.8+021718 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 59 22.8250 DE: +02 17 17.507 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 59 22.8250 DE: +02 17 17.507 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (533) Sara asteroid class: approx. diameter [km]: 32 approx. diameter ["]: 0.015 distance from Earth [AU]: 3.00160 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#64 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): 0.015", 0.003", 76.2° remarks: * orbital elements for (533)Sara : Mean anomaly = 125.5153791254 deg Arg. of pericenter = 31.5946104693 deg Long. of node = 180.2908683051 deg Inclination = 6.5570409553 deg Eccentricity = 0.0439701585 Semimajor axis = 2.9781975855 AU Perihelion dist = 2.8472457657 AU Mag: H = 9.75, G = 0.15 Epoch of elements : MJD 60476.20712692 TDT (2024 Jun 15.2071) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#642023Apr24,1.67,2024,6,15,4.971048,-0.005820,0.015992,10.053095,3.793137,-0.005134,-0.002203,0.000000,0.000000 21.6178,2.4235,105.58,23.33,False G235922.8+021718,23.98967358,2.2881962,12.40,11.79,11.46,0.0,0,,0.01045547,2.4234615,3.77,3.66,0,0,0 533,Sara,15.53,31.782,3.0016,0,0,1.966,11.11,,1.8,0 0,125.4757,2024,6,15,31.5946,180.2909,6.5570,0.04397,2.97820,2.84725,9.74,5.0,0.15 1.248,0.0150,0.0032,76,0.0036,Known errors,1.22,0,-1,-1 20240615_021718,60139.39 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 09:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org