IOTA/IOTA-ES occultation update for (903) Nealley / UCAC4 471-006337 event on 2024 Nov 13, 03:45 UT Visible from Summary ------- On 2024 Nov 13 UT, the 64.572 km diameter asteroid (903) Nealley will occult a 10.8 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.03 mag to 14.77 mag (the magnitude of the asteroid) for at most 5.150 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 13, 03:37 - 2024 Nov 13, 03:54 * geocentric midpoint of event [JD]: 2460627.65688308 * magnitude of target star: 10.77 * magnitude drop [mag]: 4.03 * estimated maximum duration [s]: 5.150 * Moon: 89 % sunlit, 52° distance * Sun: 160° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 66 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.030, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.030", 0.002", 80°) * approx speed of asteroid's shadow [km/s]: 12.5358 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 471-006337 by 903 Nealley on 2024 Nov 13 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 -135 0 0 -30 21 57 3 54 13.5 0 85 -5 -30 4 4 -30 39 51 -29 59 32 -30 44 23 .... -134 0 0 -30 17 17 3 54 13.4 1 84 -6 -29 59 23 -30 35 11 -29 54 51 -30 39 44 0.11 -133 0 0 -30 12 18 3 54 13.2 2 84 -7 -29 54 24 -30 30 14 -29 49 52 -30 34 47 0.14 -132 0 0 -30 7 2 3 54 12.8 3 83 -8 -29 49 7 -30 24 58 -29 44 34 -30 29 31 0.16 -131 0 0 -30 1 27 3 54 12.3 4 83 -8 -29 43 31 -30 19 24 -29 38 59 -30 23 57 0.17 -130 0 0 -29 55 34 3 54 11.7 5 82 -9 -29 37 37 -30 13 31 -29 33 5 -30 18 5 0.17 -129 0 0 -29 49 23 3 54 11.0 6 82 -10 -29 31 25 -30 7 21 -29 26 53 -30 11 54 0.18 -128 0 0 -29 42 53 3 54 10.2 7 81 -11 -29 24 55 -30 0 52 -29 20 22 -30 5 26 0.18 -127 0 0 -29 36 6 3 54 9.2 7 81 -12 -29 18 7 -29 54 6 -29 13 34 -29 58 40 0.18 -126 0 0 -29 29 0 3 54 8.1 8 80 -13 -29 11 1 -29 47 1 -29 6 27 -29 51 35 0.18 -125 0 0 -29 21 37 3 54 6.9 9 80 -13 -29 3 37 -29 39 39 -28 59 3 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10 8 9 24 0.20 28 0 0 8 34 16 3 38 2.1 18 272 -6 8 52 6 8 16 24 8 56 37 8 11 52 0.20 29 0 0 8 36 23 3 37 59.3 17 272 -5 8 54 13 8 18 31 8 58 44 8 13 59 0.20 30 0 0 8 38 9 3 37 56.7 17 272 -4 8 55 59 8 20 17 9 0 30 8 15 45 0.20 31 0 0 8 39 34 3 37 54.3 16 272 -3 8 57 24 8 21 43 9 1 55 8 17 11 0.20 32 0 0 8 40 38 3 37 52.0 15 272 -2 8 58 28 8 22 47 9 2 59 8 18 15 0.20 33 0 0 8 41 21 3 37 49.8 14 272 -1 8 59 11 8 23 30 9 3 42 8 18 58 0.20 34 0 0 8 41 43 3 37 47.8 13 272 0 8 59 33 8 23 52 9 4 4 8 19 20 0.20 35 0 0 8 41 44 3 37 46.0 12 272 0 8 59 34 8 23 53 9 4 5 8 19 21 0.20 36 0 0 8 41 24 3 37 44.2 11 273 1 8 59 14 8 23 33 9 3 45 8 19 1 0.20 37 0 0 8 40 43 3 37 42.7 10 273 2 8 58 33 8 22 51 9 3 4 8 18 19 0.21 38 0 0 8 39 40 3 37 41.3 9 273 3 8 57 30 8 21 49 9 2 2 8 17 17 0.21 39 0 0 8 38 16 3 37 40.0 8 273 4 8 56 7 8 20 25 9 0 38 8 15 53 0.21 40 0 0 8 36 31 3 37 38.9 7 273 5 8 54 22 8 18 39 8 58 53 8 14 7 0.21 41 0 0 8 34 25 3 37 37.9 6 273 6 8 52 16 8 16 33 8 56 47 8 12 0 0.21 42 0 0 8 31 57 3 37 37.1 5 273 7 8 49 48 8 14 4 8 54 20 8 9 32 0.21 43 0 0 8 29 8 3 37 36.4 4 274 8 8 47 0 8 11 15 8 51 31 8 6 43 0.22 44 0 0 8 25 58 3 37 35.9 3 274 9 8 43 50 8 8 4 8 48 21 8 3 32 0.23 45 0 0 8 22 26 3 37 35.6 2 274 10 8 40 18 8 4 32 8 44 50 8 0 0 0.24 46 0 0 8 18 33 3 37 35.4 1 274 11 8 36 26 8 0 38 8 40 58 7 56 6 0.29 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 471-006337 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 12 04.2100 DE: +04 03 09.404 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 12 04.2101 DE: +04 03 09.403 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.8 * B mag [mag]: 11.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (903) Nealley asteroid class: approx. diameter [km]: 65 approx. diameter ["]: 0.041 distance from Earth [AU]: 2.15120 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#68 date of fit: 2023 Apr 27 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): 0.030", 0.002", 80.163° remarks: * orbital elements for (903)Nealley : Mean anomaly = 23.1395830528 deg Arg. of pericenter = 233.7497045612 deg Long. of node = 159.3120909652 deg Inclination = 11.7722178878 deg Eccentricity = 0.0481204939 Semimajor axis = 3.2422129161 AU Perihelion dist = 3.0861960293 AU Mag: H = 10.18, G = 0.15 Epoch of elements : MJD 60627.15688125 TDT (2024 Nov 13.1569) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#682023Apr27,5.15,2024,11,13,3.765194,0.063144,-0.180963,-6.679164,-2.334921,-0.001388,0.001447,0.000001,0.000000 -45.8850,4.1185,119.60,-18.07,False UCAC4 471-006337,4.20116944,4.0526123,11.22,10.77,10.53,0.0,0,,4.22331257,4.1185247,4.03,3.83,0,0,0 903,Nealley,14.77,64.572,2.1512,0,0,-1.825,-9.54,,3.2,0 0,23.1131,2024,11,13,233.7497,159.3121,11.7722,0.04812,3.24221,3.08620,10.17,5.0,0.15 1.127,0.0300,0.0019,80,0.0053,Known errors,1.18,0,-1,-1 20241113_006337,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org