IOTA/IOTA-ES occultation update for (654) Zelinda / TYC 5465-00882-1 event on 2023 May 15, 17:37 UT Visible from S Africa Summary ------- On 2023 May 15 UT, the 130.3 km diameter asteroid (654) Zelinda will occult a 12.2 mag star in the constellation Hydra for observers along a path across S Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.81 mag to 12.31 mag (the magnitude of the asteroid) for at most 7.120 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: 100 * date and approx. time of event: 2023 May 15, 17:31 - 2023 May 15, 17:42 * geocentric midpoint of event [JD]: 2460080.23434708 * magnitude of target star: 12.20 * magnitude drop [mag]: 0.81 * estimated maximum duration [s]: 7.120 * Moon: 18 % sunlit, 139° distance * Sun: 96° distance * rough path description: S Africa The occultation path -------------------- * approximate projected width [km]: 143 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.004", 109°) * approx speed of asteroid's shadow [km/s]: 18.2905 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5465-00882-1 by 654 Zelinda on 2023 May 15 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 - 85 0 0 -22 31 45 17 32 9.4 0 101 49 -23 11 26 -21 52 16 -23 14 16 -21 49 27 .... - 84 0 0 -22 43 2 17 32 9.5 1 101 48 -23 22 44 -22 3 33 -23 25 35 -22 0 44 0.35 - 83 0 0 -22 54 22 17 32 9.7 2 100 48 -23 34 4 -22 14 52 -23 36 54 -22 12 4 0.39 - 82 0 0 -23 5 43 17 32 10.0 3 100 48 -23 45 25 -22 26 13 -23 48 16 -22 23 24 0.41 - 81 0 0 -23 17 5 17 32 10.4 4 100 48 -23 56 47 -22 37 35 -23 59 38 -22 34 46 0.42 - 80 0 0 -23 28 28 17 32 10.9 5 99 48 -24 8 11 -22 48 58 -24 11 1 -22 46 9 0.43 - 79 0 0 -23 39 52 17 32 11.5 6 99 47 -24 19 35 -23 0 22 -24 22 26 -22 57 33 0.43 - 78 0 0 -23 51 16 17 32 12.2 7 98 47 -24 30 59 -23 11 46 -24 33 50 -23 8 57 0.43 - 77 0 0 -24 2 41 17 32 13.0 8 98 47 -24 42 24 -23 23 10 -24 45 15 -23 20 21 0.44 - 76 0 0 -24 14 6 17 32 13.9 9 98 46 -24 53 49 -23 34 35 -24 56 40 -23 31 46 0.44 - 75 0 0 -24 25 30 17 32 15.0 10 97 46 -25 5 14 -23 45 59 -25 8 4 -23 43 11 0.44 - 74 0 0 -24 36 54 17 32 16.1 11 97 45 -25 16 38 -23 57 24 -25 19 29 -23 54 35 0.44 - 73 0 0 -24 48 18 17 32 17.3 12 96 45 -25 28 1 -24 8 47 -25 30 52 -24 5 58 0.44 - 72 0 0 -24 59 41 17 32 18.6 13 96 45 -25 39 24 -24 20 10 -25 42 15 -24 17 21 0.44 - 71 0 0 -25 11 2 17 32 20.0 13 95 44 -25 50 45 -24 31 32 -25 53 36 -24 28 43 0.44 - 70 0 0 -25 22 22 17 32 21.5 14 95 44 -26 2 5 -24 42 52 -26 4 56 -24 40 3 0.44 - 69 0 0 -25 33 41 17 32 23.1 15 95 43 -26 13 24 -24 54 11 -26 16 15 -24 51 22 0.44 - 68 0 0 -25 44 58 17 32 24.8 16 94 43 -26 24 41 -25 5 28 -26 27 31 -25 2 39 0.45 - 67 0 0 -25 56 13 17 32 26.5 17 94 42 -26 35 55 -25 16 43 -26 38 46 -25 13 54 0.45 - 66 0 0 -26 7 26 17 32 28.4 18 93 42 -26 47 8 -25 27 56 -26 49 59 -25 25 7 0.45 - 65 0 0 -26 18 36 17 32 30.4 19 93 41 -26 58 18 -25 39 7 -27 1 9 -25 36 18 0.45 - 64 0 0 -26 29 44 17 32 32.4 20 92 41 -27 9 26 -25 50 15 -27 12 16 -25 47 26 0.45 - 63 0 0 -26 40 49 17 32 34.6 21 92 40 -27 20 30 -26 1 20 -27 23 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16 266 -77 -29 2 41 -27 43 42 -29 5 32 -27 40 53 0.47 85 0 0 -28 12 42 17 42 32.5 15 266 -78 -28 52 18 -27 33 17 -28 55 9 -27 30 29 0.47 86 0 0 -28 2 13 17 42 34.0 14 265 -79 -28 41 50 -27 22 48 -28 44 41 -27 20 0 0.47 87 0 0 -27 51 40 17 42 35.5 13 265 -79 -28 31 18 -27 12 15 -28 34 8 -27 9 26 0.47 88 0 0 -27 41 3 17 42 36.8 12 264 -80 -28 20 41 -27 1 37 -28 23 32 -26 58 48 0.48 89 0 0 -27 30 21 17 42 38.0 11 264 -80 -28 10 0 -26 50 55 -28 12 51 -26 48 6 0.48 90 0 0 -27 19 36 17 42 39.2 10 263 -81 -27 59 15 -26 40 9 -28 2 6 -26 37 20 0.48 91 0 0 -27 8 47 17 42 40.2 9 263 -81 -27 48 27 -26 29 19 -27 51 17 -26 26 31 0.48 92 0 0 -26 57 54 17 42 41.2 9 262 -82 -27 37 34 -26 18 26 -27 40 25 -26 15 37 0.49 93 0 0 -26 46 58 17 42 42.0 8 262 -82 -27 26 39 -26 7 30 -27 29 29 -26 4 41 0.49 94 0 0 -26 35 59 17 42 42.8 7 262 -82 -27 15 40 -25 56 30 -27 18 30 -25 53 41 0.50 95 0 0 -26 24 56 17 42 43.5 6 261 -82 -27 4 38 -25 45 28 -27 7 29 -25 42 39 0.50 96 0 0 -26 13 52 17 42 44.1 5 261 -82 -26 53 33 -25 34 22 -26 56 24 -25 31 34 0.51 97 0 0 -26 2 44 17 42 44.5 4 260 -82 -26 42 26 -25 23 15 -26 45 17 -25 20 26 0.53 98 0 0 -25 51 34 17 42 44.9 3 260 -82 -26 31 17 -25 12 5 -26 34 7 -25 9 16 0.55 99 0 0 -25 40 23 17 42 45.2 2 259 -81 -26 20 5 -25 0 53 -26 22 56 -24 58 4 0.59 100 0 0 -25 29 9 17 42 45.4 1 259 -81 -26 8 52 -24 49 39 -26 11 42 -24 46 50 0.69 101 0 0 -25 17 54 17 42 45.5 0 258 -80 -25 57 36 -24 38 24 -26 0 27 -24 35 35 1.46 Uncertainty in time = +/- 0 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 5465-00882-1 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 39 39.4111 DE: -10 26 20.476 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 39 39.4108 DE: -10 26 20.474 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (654) Zelinda asteroid class: approx. diameter [km]: 130 approx. diameter ["]: 0.119 distance from Earth [AU]: 1.50910 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#124 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): 0.008", 0.004", 109.043° remarks: * orbital elements for (654)Zelinda : Mean anomaly = 33.2311222374 deg Arg. of pericenter = 214.5857735095 deg Long. of node = 278.3310366837 deg Inclination = 18.0935023477 deg Eccentricity = 0.2309906426 Semimajor axis = 2.2975506802 AU Perihelion dist = 1.7668379721 AU Mag: H = 8.67, G = 0.15 Epoch of elements : MJD 60079.73437500 TDT (2023 May 15.7344) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1242023Apr27,7.12,2023,5,15,17.624330,-0.009708,-0.408568,10.320539,-0.254788,0.004760,-0.001550,0.000000,-0.000001 7.6426,-10.5458,-85.27,18.93,False TYC 5465-00882-1,9.66094756,-10.4390212,0.00,12.20,0.00,0.0,0,,9.67979295,-10.5458196,0.81,0.00,0,0,0 654,Zelinda,12.31,130.3,1.5091,0,0,4.079,-1.49,,6.2,0 0,33.0233,2023,5,15,214.5858,278.3310,18.0935,0.23099,2.29755,1.76684,8.66,5.0,0.15 1.036,0.0080,0.0037,109,0.0043,Known errors,-1.00,-1,-1,-1 20230515_0882-1,60063.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org