IOTA/IOTA-ES occultation update for (6748) Bratton / TYC 1928-01744-1 event on 2024 Jan 06, 01:50 UT Visible from Summary ------- On 2024 Jan 06 UT, the 11.04 km diameter asteroid (6748) Bratton will occult a 10.7 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.56 mag to 18.26 mag (the magnitude of the asteroid) for at most 0.860 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: 95 * date and approx. time of event: 2024 Jan 06, 01:43 - 2024 Jan 06, 01:57 * geocentric midpoint of event [JD]: 2460315.57646192 * magnitude of target star: 10.70 * magnitude drop [mag]: 7.56 * estimated maximum duration [s]: 0.860 * Moon: 31 % sunlit, 96° distance * Sun: 164° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.44 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.003", 102°) * approx speed of asteroid's shadow [km/s]: 12.8295 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1928-01744-1 by 6748 Bratton on 2024 Jan 6 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 - 93 0 0 -14 5 2 1 56 53.8 1 66 -16 -14 1 0 -14 9 3 -13 57 29 -14 12 35 .... - 92 0 0 -13 39 28 1 56 53.5 2 65 -18 -13 35 28 -13 43 29 -13 31 58 -13 46 59 0.41 - 91 0 0 -13 14 30 1 56 53.1 3 65 -19 -13 10 30 -13 18 30 -13 7 2 -13 21 59 0.53 - 90 0 0 -12 50 7 1 56 52.4 4 65 -20 -12 46 9 -12 54 6 -12 42 41 -12 57 35 0.58 - 89 0 0 -12 26 21 1 56 51.6 5 65 -21 -12 22 23 -12 30 19 -12 18 56 -12 33 46 0.61 - 88 0 0 -12 3 10 1 56 50.5 6 65 -22 -11 59 13 -12 7 7 -11 55 47 -12 10 34 0.63 - 87 0 0 -11 40 36 1 56 49.3 7 64 -23 -11 36 40 -11 44 32 -11 33 14 -11 47 58 0.64 - 86 0 0 -11 18 38 1 56 47.8 8 64 -24 -11 14 43 -11 22 33 -11 11 18 -11 25 58 0.65 - 85 0 0 -10 57 16 1 56 46.2 9 64 -25 -10 53 22 -11 1 11 -10 49 58 -11 4 35 0.66 - 84 0 0 -10 36 32 1 56 44.4 10 64 -26 -10 32 38 -10 40 25 -10 29 15 -10 43 49 0.66 - 83 0 0 -10 16 24 1 56 42.4 11 64 -27 -10 12 31 -10 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317 -3 -40 26 44 -40 35 59 -40 22 42 -40 40 2 0.73 41 0 0 -41 6 9 1 43 32.7 12 316 -2 -41 1 32 -41 10 47 -40 57 30 -41 14 50 0.73 42 0 0 -41 40 41 1 43 30.7 11 315 -1 -41 36 4 -41 45 20 -41 32 2 -41 49 23 0.73 43 0 0 -42 14 57 1 43 28.9 10 315 0 -42 10 19 -42 19 35 -42 6 17 -42 23 38 0.73 44 0 0 -42 48 54 1 43 27.3 9 314 1 -42 44 16 -42 53 32 -42 40 14 -42 57 35 0.73 45 0 0 -43 22 31 1 43 25.8 8 313 2 -43 17 54 -43 27 9 -43 13 52 -43 31 12 0.73 46 0 0 -43 55 49 1 43 24.5 7 313 2 -43 51 11 -44 0 27 -43 47 9 -44 4 29 0.73 47 0 0 -44 28 45 1 43 23.4 6 312 3 -44 24 8 -44 33 23 -44 20 6 -44 37 26 0.74 48 0 0 -45 1 20 1 43 22.4 6 311 4 -44 56 43 -45 5 57 -44 52 41 -45 10 0 0.74 49 0 0 -45 33 31 1 43 21.6 5 310 5 -45 28 55 -45 38 8 -45 24 53 -45 42 11 0.74 50 0 0 -46 5 19 1 43 20.9 4 310 6 -46 0 43 -46 9 56 -45 56 42 -46 13 58 0.74 51 0 0 -46 36 43 1 43 20.4 3 309 7 -46 32 7 -46 41 19 -46 28 6 -46 45 21 0.75 52 0 0 -47 7 41 1 43 20.0 2 308 8 -47 3 6 -47 12 17 -46 59 6 -47 16 18 0.76 53 0 0 -47 38 14 1 43 19.8 1 308 8 -47 33 39 -47 42 50 -47 29 39 -47 46 50 0.79 54 0 0 -48 8 21 1 43 19.7 0 307 9 -48 3 46 -48 12 55 -47 59 47 -48 16 56 0.92 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 1928-01744-1 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 16 00.8242 DE: +23 25 53.707 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 16 00.8242 DE: +23 25 53.707 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 10.7 * B mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6748) Bratton asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.008 distance from Earth [AU]: 1.86990 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 date of fit: 2023 Apr 25 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): 0.011", 0.003", 102.284° remarks: * orbital elements for (6748)Bratton : Mean anomaly = 211.1860227206 deg Arg. of pericenter = 192.0329292071 deg Long. of node = 80.4665671943 deg Inclination = 4.1141847833 deg Eccentricity = 0.1629498440 Semimajor axis = 2.4682315353 AU Perihelion dist = 2.0660335917 AU Mag: H = 14.19, G = 0.15 Epoch of elements : MJD 60315.07646187 TDT (2024 Jan 06.0765) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr25,0.86,2024,1,6,1.835086,-0.189322,-0.539993,-6.833932,2.394601,-0.001720,0.000031,0.000001,0.000000 -8.3174,23.3573,153.83,-22.57,False TYC 1928-01744-1,8.26689560,23.4315852,10.86,10.70,10.61,0.0,4,,8.29091490,23.3573359,7.56,7.20,0,0,0 6748,Bratton,18.26,11.040,1.8699,0,0,-2.334,11.26,,0.8,0 0,210.9124,2024,1,5,192.0329,80.4666,4.1142,0.16295,2.46823,2.06603,14.19,5.0,0.15 1.437,0.0113,0.0033,102,0.0036,Known errors,1.04,0,-1,-1 20240106_1744-1,60137.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org