IOTA/IOTA-ES occultation update for (2197) Shanghai / UCAC4 324-137899 event on 2024 Oct 05, 20:21 UT Visible from Summary ------- On 2024 Oct 05 UT, the 21.9288449206831 km diameter asteroid (2197) Shanghai will occult a 11.4 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 6.60 mag to 17.96 mag (the magnitude of the asteroid) for at most 1.140 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 Oct 05, 20:15 - 2024 Oct 05, 20:26 * geocentric midpoint of event [JD]: 2460589.34791729 * magnitude of target star: 11.36 * magnitude drop [mag]: 6.60 * estimated maximum duration [s]: 1.140 * Moon: 8 % sunlit, 48° distance * Sun: 80° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 90°) * approx speed of asteroid's shadow [km/s]: 19.8890 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 324-137899 by 2197 Shanghai on 2024 Oct 5 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 -131 0 0 7 10 21 20 15 45.4 1 116 77 7 3 24 7 17 18 7 0 42 7 20 0 .... -130 0 0 6 41 44 20 15 45.6 2 116 78 6 34 47 6 48 40 6 32 5 6 51 22 -0.04 -129 0 0 6 13 11 20 15 45.8 3 116 78 6 6 15 6 20 8 6 3 34 6 22 49 -0.10 -128 0 0 5 44 45 20 15 46.2 4 116 79 5 37 49 5 51 41 5 35 8 5 54 23 -0.12 -127 0 0 5 16 26 20 15 46.7 5 116 80 5 9 30 5 23 21 5 6 49 5 26 3 -0.14 -126 0 0 4 48 14 20 15 47.3 6 116 80 4 41 19 4 55 9 4 38 37 4 57 50 -0.15 -125 0 0 4 20 10 20 15 48.0 7 116 80 4 13 15 4 27 4 4 10 34 4 29 46 -0.15 -124 0 0 3 52 15 20 15 48.9 8 116 81 3 45 21 3 59 9 3 42 40 4 1 50 -0.16 -123 0 0 3 24 30 20 15 49.8 9 116 81 3 17 36 3 31 23 3 14 55 3 34 4 -0.16 -122 0 0 2 56 55 20 15 50.9 11 116 81 2 50 2 3 3 48 2 47 21 3 6 29 -0.16 -121 0 0 2 29 31 20 15 52.1 12 117 80 2 22 39 2 36 24 2 19 58 2 39 5 -0.17 -120 0 0 2 2 20 20 15 53.5 13 117 80 1 55 28 2 9 12 1 52 47 2 11 52 -0.17 -119 0 0 1 35 20 20 15 54.9 14 117 80 1 28 29 1 42 12 1 25 49 1 44 52 -0.17 -118 0 0 1 8 34 20 15 56.5 15 117 79 1 1 43 1 15 25 0 59 4 1 18 5 -0.17 -117 0 0 0 42 2 20 15 58.1 16 117 78 0 35 12 0 48 52 0 32 32 0 51 32 -0.17 -116 0 0 0 15 44 20 15 59.9 17 117 78 0 8 54 0 22 34 0 6 15 0 25 13 -0.17 -115 0 0 - 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1 55 54 - 1 37 4 -0.19 6 0 0 - 1 21 22 20 25 21.3 33 240 -45 - 1 28 10 - 1 14 35 - 1 30 48 - 1 11 56 -0.19 7 0 0 - 0 55 58 20 25 24.7 32 240 -46 - 1 2 46 - 0 49 9 - 1 5 24 - 0 46 30 -0.19 8 0 0 - 0 30 16 20 25 28.0 31 240 -47 - 0 37 5 - 0 23 27 - 0 39 44 - 0 20 48 -0.19 9 0 0 - 0 4 18 20 25 31.1 30 240 -48 - 0 11 7 0 2 32 - 0 13 46 0 5 11 -0.19 10 0 0 0 21 56 20 25 34.2 29 240 -49 0 15 6 0 28 47 0 12 27 0 31 26 -0.19 11 0 0 0 48 26 20 25 37.2 28 241 -50 0 41 35 0 55 17 0 38 55 0 57 56 -0.19 12 0 0 1 15 10 20 25 40.1 27 241 -51 1 8 18 1 22 1 1 5 38 1 24 41 -0.19 13 0 0 1 42 7 20 25 42.9 26 241 -52 1 35 15 1 48 59 1 32 35 1 51 40 -0.19 14 0 0 2 9 18 20 25 45.5 24 241 -53 2 2 26 2 16 11 1 59 45 2 18 51 -0.19 15 0 0 2 36 42 20 25 48.1 23 241 -54 2 29 49 2 43 35 2 27 8 2 46 16 -0.19 16 0 0 3 4 17 20 25 50.5 22 241 -55 2 57 23 3 11 11 2 54 43 3 13 52 -0.19 17 0 0 3 32 3 20 25 52.8 21 241 -56 3 25 9 3 38 58 3 22 28 3 41 39 -0.18 18 0 0 4 0 0 20 25 55.1 20 241 -58 3 53 6 4 6 55 3 50 25 4 9 36 -0.18 19 0 0 4 28 7 20 25 57.2 19 241 -59 4 21 12 4 35 2 4 18 30 4 37 43 -0.18 20 0 0 4 56 22 20 25 59.2 18 241 -60 4 49 27 5 3 18 4 46 45 5 5 59 -0.18 21 0 0 5 24 46 20 26 1.0 17 241 -61 5 17 50 5 31 42 5 15 8 5 34 23 -0.18 22 0 0 5 53 16 20 26 2.8 16 242 -62 5 46 20 6 0 13 5 43 38 6 2 55 -0.18 23 0 0 6 21 54 20 26 4.4 14 242 -63 6 14 57 6 28 50 6 12 15 6 31 32 -0.18 24 0 0 6 50 37 20 26 5.9 13 242 -64 6 43 40 6 57 34 6 40 58 7 0 16 -0.18 25 0 0 7 19 25 20 26 7.3 12 242 -65 7 12 28 7 26 22 7 9 46 7 29 5 -0.18 26 0 0 7 48 17 20 26 8.6 11 242 -66 7 41 20 7 55 15 7 38 38 7 57 57 -0.18 27 0 0 8 17 13 20 26 9.8 10 242 -66 8 10 16 8 24 11 8 7 33 8 26 54 -0.18 28 0 0 8 46 12 20 26 10.8 9 242 -67 8 39 14 8 53 10 8 36 32 8 55 52 -0.18 29 0 0 9 15 12 20 26 11.7 8 243 -68 9 8 14 9 22 10 9 5 32 9 24 53 -0.18 30 0 0 9 44 13 20 26 12.5 7 243 -69 9 37 15 9 51 12 9 34 33 9 53 54 -0.18 31 0 0 10 13 15 20 26 13.2 6 243 -70 10 6 17 10 20 13 10 3 34 10 22 56 -0.18 32 0 0 10 42 16 20 26 13.7 5 243 -71 10 35 18 10 49 14 10 32 35 10 51 57 -0.17 33 0 0 11 11 15 20 26 14.2 3 243 -72 11 4 17 11 18 14 11 1 35 11 20 57 -0.17 34 0 0 11 40 13 20 26 14.5 2 243 -72 11 33 15 11 47 11 11 30 32 11 49 54 -0.16 35 0 0 12 9 8 20 26 14.7 1 244 -73 12 2 9 12 16 6 11 59 27 12 18 49 -0.14 36 0 0 12 37 58 20 26 14.7 0 244 -74 12 31 0 12 44 57 12 28 18 12 47 40 0.11 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 324-137899 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 13 48.0759 DE: -25 22 45.940 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 13 48.0758 DE: -25 22 45.940 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.4 * B mag [mag]: 13.0 * Diameter [mas]: 0.30 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2197) Shanghai asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.008 distance from Earth [AU]: 3.56260 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 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): 0.014", 0.002", 89.919° remarks: * orbital elements for (2197)Shanghai : Mean anomaly = 158.0546985283 deg Arg. of pericenter = 70.1459838406 deg Long. of node = 56.3136073983 deg Inclination = 2.4943577535 deg Eccentricity = 0.1300736860 Semimajor axis = 3.1495260230 AU Perihelion dist = 2.7398555641 AU Mag: H = 11.59, G = 0.15 Epoch of elements : MJD 60588.84791708 TDT (2024 Oct 05.8479) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,1.14,2024,10,5,20.350015,-0.009944,0.192222,11.211439,0.569188,0.005829,0.000122,0.000000,0.000000 -46.4170,-25.3736,-128.21,-5.17,False UCAC4 324-137899,18.23002110,-25.3794277,13.03,11.36,10.46,0.3,0,,18.25539314,-25.3735627,6.60,7.05,0,0,0 2197,Shanghai,17.96,22.704,3.5626,0,0,2.042,1.41,,1.2,0 0,157.9052,2024,10,5,70.1460,56.3136,2.4944,0.13007,3.14953,2.73986,11.58,5.0,0.15 1.194,0.0140,0.0016,90,0.0017,Known errors,0.58,0,-1,-1 20241005_137899,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org