IOTA/IOTA-ES occultation update for (2197) Shanghai / UCAC4 322-122494 event on 2024 Aug 08, 12:04 UT Visible from Summary ------- On 2024 Aug 08 UT, the 21.945478995702 km diameter asteroid (2197) Shanghai will occult a 11.9 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 5.33 mag to 17.23 mag (the magnitude of the asteroid) for at most 4.480 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 Aug 08, 11:43 - 2024 Aug 08, 12:25 * geocentric midpoint of event [JD]: 2460531.00285921 * magnitude of target star: 11.91 * magnitude drop [mag]: 5.33 * estimated maximum duration [s]: 4.480 * Moon: 15 % sunlit, 87° distance * Sun: 133° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 7.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.002", 92°) * approx speed of asteroid's shadow [km/s]: 4.9909 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 322-122494 by 2197 Shanghai on 2024 Aug 8 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 44 0 0 16 30 52 12 24 42.2 0 117 43 16 37 59 16 23 46 16 40 19 16 21 25 .... 45 0 0 16 1 31 12 24 41.8 1 117 42 16 8 37 15 54 24 16 10 58 15 52 4 -0.07 46 0 0 15 32 9 12 24 41.0 2 118 41 15 39 16 15 25 3 15 41 36 15 22 43 -0.17 47 0 0 15 2 49 12 24 39.7 4 118 40 15 9 55 14 55 43 15 12 15 14 53 23 -0.21 48 0 0 14 33 30 12 24 38.0 5 118 39 14 40 36 14 26 24 14 42 56 14 24 4 -0.24 49 0 0 14 4 13 12 24 35.8 6 118 38 14 11 19 13 57 8 14 13 39 13 54 48 -0.25 50 0 0 13 35 0 12 24 33.1 7 119 37 13 42 5 13 27 55 13 44 25 13 25 36 -0.26 51 0 0 13 5 51 12 24 30.0 8 119 36 13 12 56 12 58 47 13 15 16 12 56 27 -0.27 52 0 0 12 36 47 12 24 26.4 9 119 35 12 43 51 12 29 43 12 46 11 12 27 23 -0.27 53 0 0 12 7 48 12 24 22.3 10 119 34 12 14 52 12 0 45 12 17 12 11 58 25 -0.27 54 0 0 11 38 56 12 24 17.8 11 119 33 11 45 59 11 31 53 11 48 19 11 29 34 -0.28 55 0 0 11 10 11 12 24 12.9 12 120 32 11 17 13 11 3 8 11 19 33 11 0 49 -0.28 56 0 0 10 41 33 12 24 7.5 13 120 31 10 48 35 10 34 31 10 50 54 10 32 12 -0.28 57 0 0 10 13 4 12 24 1.6 14 120 30 10 20 6 10 6 2 10 22 24 10 3 44 -0.28 58 0 0 9 44 44 12 23 55.4 15 120 29 9 51 45 9 37 43 9 54 4 9 35 24 -0.29 59 0 0 9 16 34 12 23 48.6 16 120 28 9 23 34 9 9 33 9 25 53 9 7 15 -0.29 60 0 0 8 48 34 12 23 41.5 17 121 27 8 55 34 8 41 34 8 57 52 8 39 16 -0.29 61 0 0 8 20 45 12 23 33.9 18 121 26 8 27 44 8 13 46 8 30 3 8 11 28 -0.29 62 0 0 7 53 8 12 23 26.0 20 121 25 8 0 7 7 46 10 8 2 25 7 43 52 -0.29 63 0 0 7 25 43 12 23 17.6 21 121 24 7 32 41 7 18 46 7 34 59 7 16 28 -0.29 64 0 0 6 58 32 12 23 8.8 22 121 23 7 5 29 6 51 35 7 7 46 6 49 17 -0.29 65 0 0 6 31 33 12 22 59.6 23 121 22 6 38 29 6 24 37 6 40 47 6 22 20 -0.29 66 0 0 6 4 48 12 22 50.0 24 122 21 6 11 44 5 57 53 6 14 1 5 55 36 -0.29 67 0 0 5 38 18 12 22 40.1 25 122 20 5 45 13 5 31 24 5 47 30 5 29 7 -0.29 68 0 0 5 12 3 12 22 29.7 26 122 18 5 18 57 5 5 9 5 21 14 5 2 53 -0.29 69 0 0 4 46 3 12 22 19.0 27 122 17 4 52 57 4 39 10 4 55 13 4 36 54 -0.29 70 0 0 4 20 19 12 22 8.0 28 122 16 4 27 12 4 13 27 4 29 28 4 11 11 -0.29 71 0 0 3 54 52 12 21 56.5 29 122 15 4 1 44 3 48 0 4 3 59 3 45 45 -0.29 72 0 0 3 29 41 12 21 44.8 30 122 14 3 36 32 3 22 50 3 38 47 3 20 35 -0.29 73 0 0 3 4 47 12 21 32.7 31 123 13 3 11 37 2 57 57 3 13 53 2 55 42 -0.29 74 0 0 2 40 11 12 21 20.2 32 123 12 2 47 0 2 33 22 2 49 15 2 31 7 -0.29 75 0 0 2 15 53 12 21 7.5 33 123 11 2 22 41 2 9 4 2 24 56 2 6 50 -0.29 76 0 0 1 51 53 12 20 54.4 34 123 10 1 58 41 1 45 5 2 0 55 1 42 51 -0.29 77 0 0 1 28 11 12 20 41.0 35 123 9 1 34 58 1 21 24 1 37 12 1 19 11 -0.29 78 0 0 1 4 49 12 20 27.4 36 123 8 1 11 35 0 58 3 1 13 49 0 55 49 -0.29 79 0 0 0 41 45 12 20 13.4 37 124 7 0 48 31 0 35 0 0 50 44 0 32 47 -0.29 80 0 0 0 19 2 12 19 59.2 38 124 6 0 25 46 0 12 17 0 28 0 0 10 4 -0.29 81 0 0 - 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5 14 28 - 5 27 32 - 5 12 19 - 5 29 42 -0.29 -178 0 0 - 5 4 15 11 48 47.4 40 240 -79 - 4 57 42 - 5 10 48 - 4 55 33 - 5 12 57 -0.29 -177 0 0 - 4 47 6 11 48 33.0 39 240 -79 - 4 40 32 - 4 53 40 - 4 38 23 - 4 55 49 -0.29 -176 0 0 - 4 29 34 11 48 18.8 38 241 -79 - 4 22 59 - 4 36 8 - 4 20 49 - 4 38 18 -0.29 -175 0 0 - 4 11 38 11 48 4.9 37 241 -78 - 4 5 2 - 4 18 13 - 4 2 52 - 4 20 23 -0.29 -174 0 0 - 3 53 18 11 47 51.2 36 241 -78 - 3 46 42 - 3 59 54 - 3 44 32 - 4 2 4 -0.29 -173 0 0 - 3 34 36 11 47 37.9 35 241 -77 - 3 27 59 - 3 41 12 - 3 25 48 - 3 43 23 -0.29 -172 0 0 - 3 15 30 11 47 24.7 34 241 -77 - 3 8 52 - 3 22 7 - 3 6 41 - 3 24 18 -0.29 -171 0 0 - 2 56 1 11 47 11.9 33 241 -76 - 2 49 22 - 3 2 39 - 2 47 11 - 3 4 50 -0.29 -170 0 0 - 2 36 9 11 46 59.4 32 241 -76 - 2 29 30 - 2 42 48 - 2 27 18 - 2 45 0 -0.29 -169 0 0 - 2 15 55 11 46 47.1 31 241 -75 - 2 9 15 - 2 22 35 - 2 7 3 - 2 24 46 -0.29 -168 0 0 - 1 55 18 11 46 35.2 30 241 -74 - 1 48 37 - 2 1 58 - 1 46 25 - 2 4 10 -0.29 -167 0 0 - 1 34 18 11 46 23.5 29 241 -74 - 1 27 36 - 1 41 0 - 1 25 24 - 1 43 12 -0.29 -166 0 0 - 1 12 56 11 46 12.2 28 241 -73 - 1 6 14 - 1 19 39 - 1 4 1 - 1 21 51 -0.29 -165 0 0 - 0 51 13 11 46 1.2 27 241 -72 - 0 44 29 - 0 57 56 - 0 42 16 - 1 0 9 -0.30 -164 0 0 - 0 29 7 11 45 50.6 26 241 -71 - 0 22 23 - 0 35 51 - 0 20 10 - 0 38 4 -0.30 -163 0 0 - 0 6 40 11 45 40.3 25 241 -70 0 0 5 - 0 13 25 0 2 19 - 0 15 38 -0.30 -162 0 0 0 16 8 11 45 30.3 24 241 -69 0 22 55 0 9 23 0 25 8 0 7 9 -0.30 -161 0 0 0 39 18 11 45 20.7 23 242 -68 0 46 5 0 32 31 0 48 19 0 30 17 -0.30 -160 0 0 1 2 48 11 45 11.4 22 242 -68 1 9 36 0 56 1 1 11 51 0 53 47 -0.30 -159 0 0 1 26 39 11 45 2.5 21 242 -67 1 33 28 1 19 51 1 35 42 1 17 36 -0.30 -158 0 0 1 50 50 11 44 54.0 20 242 -66 1 57 40 1 44 1 1 59 55 1 41 46 -0.30 -157 0 0 2 15 21 11 44 45.9 19 242 -65 2 22 11 2 8 31 2 24 27 2 6 16 -0.30 -156 0 0 2 40 11 11 44 38.1 18 242 -64 2 47 3 2 33 20 2 49 18 2 31 5 -0.30 -155 0 0 3 5 21 11 44 30.8 17 242 -63 3 12 13 2 58 29 3 14 29 2 56 13 -0.30 -154 0 0 3 30 49 11 44 23.9 16 242 -62 3 37 42 3 23 56 3 39 58 3 21 40 -0.30 -153 0 0 3 56 36 11 44 17.4 15 242 -61 4 3 29 3 49 42 4 5 46 3 47 26 -0.30 -152 0 0 4 22 40 11 44 11.3 14 242 -60 4 29 35 4 15 46 4 31 51 4 13 29 -0.30 -151 0 0 4 49 2 11 44 5.6 13 242 -59 4 55 57 4 42 6 4 58 14 4 39 50 -0.30 -150 0 0 5 15 41 11 44 0.4 12 242 -58 5 22 37 5 8 44 5 24 54 5 6 28 -0.31 -149 0 0 5 42 36 11 43 55.6 11 242 -57 5 49 33 5 35 39 5 51 50 5 33 22 -0.31 -148 0 0 6 9 47 11 43 51.2 10 243 -56 6 16 45 6 2 49 6 19 2 6 0 32 -0.31 -147 0 0 6 37 13 11 43 47.3 9 243 -55 6 44 12 6 30 15 6 46 30 6 27 57 -0.31 -146 0 0 7 4 55 11 43 43.8 7 243 -54 7 11 54 6 57 55 7 14 12 6 55 37 -0.31 -145 0 0 7 32 50 11 43 40.9 6 243 -53 7 39 50 7 25 50 7 42 9 7 23 32 -0.31 -144 0 0 8 0 59 11 43 38.3 5 243 -52 8 8 0 7 53 59 8 10 19 7 51 40 -0.31 -143 0 0 8 29 21 11 43 36.3 4 243 -50 8 36 23 8 22 20 8 38 42 8 20 1 -0.31 -142 0 0 8 57 56 11 43 34.7 3 243 -49 9 4 58 8 50 54 9 7 17 8 48 35 -0.31 -141 0 0 9 26 42 11 43 33.6 2 244 -48 9 33 45 9 19 39 9 36 4 9 17 20 -0.31 -140 0 0 9 55 39 11 43 33.0 1 244 -47 10 2 42 9 48 35 10 5 2 9 46 16 -0.32 Uncertainty in time = +/- 7 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 322-122494 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 55 13.7015 DE: -25 41 21.413 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 55 13.7015 DE: -25 41 21.413 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.9 * B mag [mag]: 13.5 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2197) Shanghai asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.74050 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): 0.019", 0.002", 92.076° remarks: * orbital elements for (2197)Shanghai : Mean anomaly = 147.7687966043 deg Arg. of pericenter = 70.1459197461 deg Long. of node = 56.3143788431 deg Inclination = 2.4943870891 deg Eccentricity = 0.1300164431 Semimajor axis = 3.1496716860 AU Perihelion dist = 2.7401625764 AU Mag: H = 11.59, G = 0.15 Epoch of elements : MJD 60530.50286037 TDT (2024 Aug 08.5029) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,4.48,2024,8,8,12.068621,0.015672,0.256750,-2.811720,0.172296,0.004225,0.000129,0.000001,0.000000 130.6722,-25.6944,0.38,15.91,False UCAC4 322-122494,17.92047265,-25.6892815,13.46,11.91,11.07,0.2,0,,17.94612651,-25.6943950,5.33,5.71,0,0,0 2197,Shanghai,17.23,22.343,2.7405,0,0,-0.667,0.55,,1.2,0 0,147.6801,2024,8,8,70.1459,56.3144,2.4944,0.13002,3.14967,2.74016,11.58,5.0,0.15 1.165,0.0187,0.0018,92,0.0018,Known errors,1.09,0,-1,-1 20240808_122494,60140.24 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org