IOTA/IOTA-ES occultation update for (4717) Kaneko / UCAC4 308-146105 event on 2024 Oct 28, 17:53 UT Visible from Summary ------- On 2024 Oct 28 UT, the 20.255 km diameter asteroid (4717) Kaneko will occult a 11.7 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 5.43 mag to 17.12 mag (the magnitude of the asteroid) for at most 0.570 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: 96 * date and approx. time of event: 2024 Oct 28, 17:50 - 2024 Oct 28, 17:56 * geocentric midpoint of event [JD]: 2460612.24552034 * magnitude of target star: 11.70 * magnitude drop [mag]: 5.43 * estimated maximum duration [s]: 0.570 * Moon: 13 % sunlit, 95° distance * Sun: 54° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 0.42 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.003", 100°) * approx speed of asteroid's shadow [km/s]: 35.4729 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 308-146105 by 4717 Kaneko on 2024 Oct 28 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 -127 0 0 - 2 16 50 17 50 33.9 0 118 53 - 2 23 7 - 2 10 34 - 2 28 24 - 2 5 16 .... -126 0 0 - 2 49 38 17 50 34.0 1 118 54 - 2 55 55 - 2 43 21 - 3 1 13 - 2 38 4 0.18 -125 0 0 - 3 22 30 17 50 34.1 2 118 56 - 3 28 47 - 3 16 13 - 3 34 5 - 3 10 55 0.14 -124 0 0 - 3 55 24 17 50 34.3 4 118 57 - 4 1 41 - 3 49 7 - 4 6 59 - 3 43 49 0.12 -123 0 0 - 4 28 20 17 50 34.5 5 118 58 - 4 34 37 - 4 22 3 - 4 39 55 - 4 16 45 0.12 -122 0 0 - 5 1 17 17 50 34.8 6 118 59 - 5 7 34 - 4 54 59 - 5 12 52 - 4 49 41 0.11 -121 0 0 - 5 34 13 17 50 35.2 7 118 60 - 5 40 31 - 5 27 56 - 5 45 49 - 5 22 38 0.11 -120 0 0 - 6 7 8 17 50 35.7 8 118 61 - 6 13 26 - 6 0 51 - 6 18 44 - 5 55 33 0.11 -119 0 0 - 6 40 1 17 50 36.2 9 118 62 - 6 46 19 - 6 33 44 - 6 51 37 - 6 28 26 0.10 -118 0 0 - 7 12 51 17 50 36.8 10 118 63 - 7 19 8 - 7 6 33 - 7 24 26 - 7 1 16 0.10 -117 0 0 - 7 45 36 17 50 37.5 11 118 65 - 7 51 54 - 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9 43 3 17 56 30.9 7 242 -47 - 9 49 19 - 9 36 46 - 9 54 36 - 9 31 29 0.12 51 0 0 - 9 10 44 17 56 31.3 6 242 -48 - 9 17 1 - 9 4 28 - 9 22 18 - 8 59 10 0.13 52 0 0 - 8 38 18 17 56 31.6 5 242 -49 - 8 44 35 - 8 32 1 - 8 49 53 - 8 26 44 0.14 53 0 0 - 8 5 46 17 56 31.9 3 242 -50 - 8 12 3 - 7 59 29 - 8 17 20 - 7 54 11 0.15 54 0 0 - 7 33 7 17 56 32.0 2 242 -51 - 7 39 25 - 7 26 50 - 7 44 42 - 7 21 33 0.18 55 0 0 - 7 0 24 17 56 32.2 1 241 -52 - 7 6 42 - 6 54 7 - 7 12 0 - 6 48 50 0.27 56 0 0 - 6 27 38 17 56 32.2 0 241 -54 - 6 33 55 - 6 21 21 - 6 39 13 - 6 16 3 2.13 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 308-146105 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 55 45.5378 DE: -28 27 39.493 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 55 45.5377 DE: -28 27 39.493 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.7 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4717) Kaneko asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.009 distance from Earth [AU]: 3.23280 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.016", 0.003", 100.253° remarks: * orbital elements for (4717)Kaneko : Mean anomaly = 335.7347944122 deg Arg. of pericenter = 242.4198543377 deg Long. of node = 73.2393384315 deg Inclination = 10.7850571794 deg Eccentricity = 0.0940920820 Semimajor axis = 3.0180272120 AU Perihelion dist = 2.7340547481 AU Mag: H = 11.47, G = 0.15 Epoch of elements : MJD 60611.74552008 TDT (2024 Oct 28.7455) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr25,0.57,2024,10,28,17.892488,-0.004100,-0.085083,20.004907,-0.824560,0.004715,-0.000326,-0.000001,0.000000 -36.6261,-28.4660,-92.45,-13.46,False UCAC4 308-146105,17.92931610,-28.4609705,12.00,11.70,11.54,0.0,0,,17.95519293,-28.4660328,5.43,5.14,0,0,1 4717,Kaneko,17.12,20.255,3.2328,0,0,4.127,-2.24,,1.6,0 0,335.5946,2024,10,28,242.4199,73.2393,10.7851,0.09409,3.01803,2.73405,11.47,5.0,0.15 1.421,0.0160,0.0029,100,0.0036,Known errors,1.11,0,-1,-1 20241028_146105,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org