IOTA/IOTA-ES occultation update for (7895) Kaseda / UCAC4 363-122383 event on 2024 Oct 21, 16:28 UT Visible from Summary ------- On 2024 Oct 21 UT, the 29.5684475497509 km diameter asteroid (7895) Kaseda will occult a 9.4 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 8.37 mag to 17.77 mag (the magnitude of the asteroid) for at most 0.980 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: 69 * date and approx. time of event: 2024 Oct 21, 16:25 - 2024 Oct 21, 16:32 * geocentric midpoint of event [JD]: 2460605.18659117 * magnitude of target star: 9.40 * magnitude drop [mag]: 8.37 * estimated maximum duration [s]: 0.980 * Moon: 77 % sunlit, 169° distance * Sun: 61° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 0.86 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.010", 101°) * approx speed of asteroid's shadow [km/s]: 31.4059 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 363-122383 by 7895 Kaseda on 2024 Oct 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 - 98 0 0 - 1 43 55 16 25 22.8 0 108 61 - 1 52 55 - 1 34 56 - 2 8 21 - 1 19 32 .... - 97 0 0 - 2 3 14 16 25 22.9 1 108 62 - 2 12 15 - 1 54 14 - 2 27 42 - 1 38 49 0.21 - 96 0 0 - 2 22 46 16 25 23.0 2 108 63 - 2 31 47 - 2 13 45 - 2 47 15 - 1 58 19 0.22 - 95 0 0 - 2 42 31 16 25 23.2 3 107 64 - 2 51 32 - 2 33 29 - 3 7 1 - 2 18 2 0.22 - 94 0 0 - 3 2 27 16 25 23.4 4 107 65 - 3 11 30 - 2 53 26 - 3 26 59 - 2 37 58 0.22 - 93 0 0 - 3 22 36 16 25 23.8 6 107 66 - 3 31 39 - 3 13 34 - 3 47 10 - 2 58 5 0.22 - 92 0 0 - 3 42 56 16 25 24.2 7 107 67 - 3 51 59 - 3 33 53 - 4 7 31 - 3 18 23 0.22 - 91 0 0 - 4 3 27 16 25 24.6 8 107 68 - 4 12 31 - 3 54 23 - 4 28 3 - 3 38 53 0.22 - 90 0 0 - 4 24 8 16 25 25.2 9 107 69 - 4 33 13 - 4 15 4 - 4 48 46 - 3 59 33 0.22 - 89 0 0 - 4 45 0 16 25 25.8 10 107 70 - 4 54 5 - 4 35 55 - 5 9 39 - 4 20 23 0.22 - 88 0 0 - 5 6 1 16 25 26.5 11 107 71 - 5 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0 0 -25 50 50 16 31 52.2 16 258 -38 -25 59 44 -25 41 57 -26 14 59 -25 26 44 0.23 72 0 0 -25 35 26 16 31 53.1 15 257 -39 -25 44 21 -25 26 33 -25 59 37 -25 11 18 0.23 73 0 0 -25 19 46 16 31 54.0 14 257 -40 -25 28 41 -25 10 52 -25 43 58 -24 55 36 0.23 74 0 0 -25 3 50 16 31 54.8 13 256 -41 -25 12 45 -24 54 55 -25 28 4 -24 39 38 0.23 75 0 0 -24 47 38 16 31 55.5 12 256 -42 -24 56 34 -24 38 42 -25 11 53 -24 23 24 0.23 76 0 0 -24 31 10 16 31 56.2 11 256 -43 -24 40 7 -24 22 14 -24 55 27 -24 6 55 0.23 77 0 0 -24 14 27 16 31 56.9 10 255 -43 -24 23 24 -24 5 30 -24 38 46 -23 50 10 0.23 78 0 0 -23 57 28 16 31 57.5 9 255 -44 -24 6 26 -23 48 31 -24 21 49 -23 33 10 0.24 79 0 0 -23 40 15 16 31 58.0 8 254 -45 -23 49 14 -23 31 17 -24 4 37 -23 15 55 0.24 80 0 0 -23 22 47 16 31 58.5 7 254 -46 -23 31 46 -23 13 48 -23 47 11 -22 58 26 0.24 81 0 0 -23 5 5 16 31 58.9 6 254 -47 -23 14 4 -22 56 5 -23 29 30 -22 40 42 0.25 82 0 0 -22 47 8 16 31 59.3 5 253 -48 -22 56 8 -22 38 8 -23 11 35 -22 22 43 0.25 83 0 0 -22 28 58 16 31 59.6 4 253 -48 -22 37 59 -22 19 57 -22 53 26 -22 4 32 0.26 84 0 0 -22 10 34 16 31 59.8 3 252 -49 -22 19 35 -22 1 33 -22 35 4 -21 46 6 0.28 85 0 0 -21 51 57 16 32 0.0 3 252 -50 -22 0 59 -21 42 55 -22 16 28 -21 27 27 0.30 86 0 0 -21 33 6 16 32 0.1 2 252 -51 -21 42 9 -21 24 4 -21 57 39 -21 8 36 0.36 87 0 0 -21 14 4 16 32 0.2 1 251 -52 -21 23 7 -21 5 1 -21 38 38 -20 49 32 0.62 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 363-122383 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 55 25.0956 DE: -17 34 52.994 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 55 25.0956 DE: -17 34 52.994 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.200) * V mag [mag]: 9.4 * B mag [mag]: 10.9 * Diameter [mas]: 0.50 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7895) Kaseda asteroid class: approx. diameter [km]: 30 approx. diameter ["]: 0.011 distance from Earth [AU]: 3.64430 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 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", 0.010", 101.074° remarks: * orbital elements for (7895)Kaseda : Mean anomaly = 96.6040030135 deg Arg. of pericenter = 36.9614369591 deg Long. of node = 133.4205956114 deg Inclination = 13.2323067093 deg Eccentricity = 0.1521006788 Semimajor axis = 3.1492791407 AU Perihelion dist = 2.6702716456 AU Mag: H = 11.54, G = 0.15 Epoch of elements : MJD 60604.68659100 TDT (2024 Oct 21.6866) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr25,0.98,2024,10,21,16.478188,-0.036535,-0.202229,17.449488,-3.120831,0.005143,0.000262,-0.000001,0.000000 -8.5695,-17.5858,-71.04,-11.04,False UCAC4 363-122383,17.92363771,-17.5813871,10.88,9.40,8.60,0.5,0,,17.94748648,-17.5857585,8.37,8.72,0,0,0 7895,Kaseda,17.77,30.890,3.6443,0,0,2.945,-7.53,,1.8,0 0,96.4829,2024,10,21,36.9614,133.4206,13.2323,0.15210,3.14928,2.67027,11.54,5.0,0.15 1.857,0.0157,0.0100,101,0.0100,Known errors,0.81,0,-1,-1 20241021_122383,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:36 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org