IOTA/IOTA-ES occultation update for (1315) Bronislawa / UCAC4 371-124957 event on 2024 Jul 21, 01:23 UT Visible from Summary ------- On 2024 Jul 21 UT, the 64.429 km diameter asteroid (1315) Bronislawa will occult a 11.5 mag star in the constellation Serpens for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.16 mag to 14.59 mag (the magnitude of the asteroid) for at most 7.060 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 21, 01:12 - 2024 Jul 21, 01:33 * geocentric midpoint of event [JD]: 2460512.55790492 * magnitude of target star: 11.49 * magnitude drop [mag]: 3.16 * estimated maximum duration [s]: 7.060 * Moon: 100 % sunlit, 22° distance * Sun: 155° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 74 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 4.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.030, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.031", 0.005", 82°) * approx speed of asteroid's shadow [km/s]: 9.1230 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 371-124957 by 1315 Bronislawa on 2024 Jul 21 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 -146 0 0 -28 48 11 1 33 32.2 0 108 17 -28 27 17 -29 9 9 -28 21 31 -29 14 57 .... -145 0 0 -29 5 29 1 33 32.0 1 107 16 -28 44 35 -29 26 27 -28 38 50 -29 32 16 0.46 -144 0 0 -29 22 46 1 33 31.6 2 107 15 -29 1 52 -29 43 44 -28 56 6 -29 49 32 0.49 -143 0 0 -29 40 0 1 33 30.9 3 106 15 -29 19 6 -30 0 59 -29 13 21 -30 6 47 0.51 -142 0 0 -29 57 12 1 33 30.1 4 106 14 -29 36 18 -30 18 11 -29 30 33 -30 23 59 0.52 -141 0 0 -30 14 22 1 33 29.1 5 105 13 -29 53 27 -30 35 20 -29 47 42 -30 41 8 0.52 -140 0 0 -30 31 27 1 33 27.8 6 105 12 -30 10 33 -30 52 26 -30 4 48 -30 58 14 0.53 -139 0 0 -30 48 30 1 33 26.4 7 104 11 -30 27 36 -31 9 28 -30 21 50 -31 15 16 0.53 -138 0 0 -31 5 28 1 33 24.8 8 104 10 -30 44 34 -31 26 27 -30 38 49 -31 32 15 0.53 -137 0 0 -31 22 22 1 33 23.0 9 103 9 -31 1 29 -31 43 21 -30 55 43 -31 49 9 0.53 -136 0 0 -31 39 12 1 33 21.0 10 103 8 -31 18 19 -32 0 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Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 371-124957 * constellation : Serpens * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 18 42.4247 DE: -15 51 36.501 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 18 42.4247 DE: -15 51 36.501 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.5 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1315) Bronislawa asteroid class: approx. diameter [km]: 64 approx. diameter ["]: 0.044 distance from Earth [AU]: 2.03910 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#73 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", 0.005", 82.377° remarks: * orbital elements for (1315)Bronislawa : Mean anomaly = 21.7352648400 deg Arg. of pericenter = 21.0930692102 deg Long. of node = 236.4466934756 deg Inclination = 7.0811759699 deg Eccentricity = 0.0740024500 Semimajor axis = 3.2087882226 AU Perihelion dist = 2.9713300327 AU Mag: H = 10.09, G = 0.15 Epoch of elements : MJD 60512.05790471 TDT (2024 Jul 21.0579) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#732023Apr24,7.06,2024,7,21,1.389718,0.003629,-0.488970,-5.149151,-0.038194,0.002283,-0.000582,0.000001,0.000000 -45.1209,-15.8505,160.77,20.40,False UCAC4 371-124957,18.31178464,-15.8601391,11.64,11.49,11.41,0.0,0,,18.33565764,-15.8504876,3.16,2.82,0,0,0 1315,Bronislawa,14.59,64.429,2.0391,0,0,-1.538,-0.17,,3.2,0 0,21.5539,2024,7,20,21.0931,236.4467,7.0812,0.07400,3.20879,2.97133,10.09,5.0,0.15 1.138,0.0307,0.0047,82,0.0060,Known errors,0.83,0,-1,-1 20240721_124957,60140.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org