IOTA/IOTA-ES occultation update for (654) Zelinda / UCAC4-385-052448 event on 2023 Feb 14, 04:41 UT Visible from Africa, South America Summary ------- On 2023 Feb 14 UT, the 130.3 km diameter asteroid (654) Zelinda will occult a 12.4 mag star in the constellation Hydra for observers along a path across Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.16 mag to 10.39 mag (the magnitude of the asteroid) for at most 16.980 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: 100 * date and approx. time of event: 2023 Feb 14, 04:27 - 2023 Feb 14, 04:55 * geocentric midpoint of event [JD]: 2459989.69555255 * magnitude of target star: 12.41 * magnitude drop [mag]: 0.16 * estimated maximum duration [s]: 16.980 * Moon: 44 % sunlit, 97° distance * Sun: 151° distance * rough path description: Africa, South America Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 131 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.004", 113°) * approx speed of asteroid's shadow [km/s]: 7.6742 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-385-052448 by 654 Zelinda on 2023 Feb 14 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 -174 0 0 -12 9 55 4 55 20.2 1 103 16 -11 33 14 -12 46 33 -11 29 48 -12 49 58 .... -173 0 0 -12 23 41 4 55 20.0 2 103 15 -11 47 3 -13 0 16 -11 43 38 -13 3 41 -0.04 -172 0 0 -12 37 4 4 55 19.4 3 103 14 -12 0 29 -13 13 35 -11 57 4 -13 17 0 -0.08 -171 0 0 -12 50 3 4 55 18.7 4 103 13 -12 13 32 -13 26 31 -12 10 7 -13 29 56 -0.10 -170 0 0 -13 2 39 4 55 17.6 5 103 12 -12 26 10 -13 39 4 -12 22 46 -13 42 28 -0.11 -169 0 0 -13 14 50 4 55 16.4 6 102 11 -12 38 25 -13 51 12 -12 35 1 -13 54 36 -0.11 -168 0 0 -13 26 39 4 55 14.8 7 102 10 -12 50 16 -14 2 58 -12 46 52 -14 6 21 -0.12 -167 0 0 -13 38 3 4 55 13.1 7 102 9 -13 1 43 -14 14 19 -12 58 19 -14 17 42 -0.12 -166 0 0 -13 49 4 4 55 11.1 8 102 9 -13 12 47 -14 25 17 -13 9 23 -14 28 40 -0.12 -165 0 0 -13 59 41 4 55 8.8 9 101 8 -13 23 26 -14 35 51 -13 20 3 -14 39 14 -0.12 -164 0 0 -14 9 54 4 55 6.4 10 101 7 -13 33 42 -14 46 2 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54 -0.13 -151 0 0 -15 46 56 4 54 14.2 23 98 -5 -15 11 10 -16 22 39 -15 7 49 -16 26 0 -0.13 -150 0 0 -15 51 40 4 54 8.8 24 98 -6 -15 15 55 -16 27 22 -15 12 34 -16 30 42 -0.13 -149 0 0 -15 56 0 4 54 3.1 25 98 -7 -15 20 16 -16 31 41 -15 16 56 -16 35 1 -0.13 -148 0 0 -15 59 57 4 53 57.2 26 97 -8 -15 24 15 -16 35 37 -15 20 54 -16 38 57 -0.13 -147 0 0 -16 3 31 4 53 51.2 27 97 -8 -15 27 49 -16 39 10 -15 24 29 -16 42 30 -0.13 -146 0 0 -16 6 42 4 53 44.9 28 97 -9 -15 31 1 -16 42 20 -15 27 41 -16 45 39 -0.13 -145 0 0 -16 9 29 4 53 38.5 29 97 -10 -15 33 50 -16 45 7 -15 30 29 -16 48 26 -0.13 -144 0 0 -16 11 54 4 53 31.9 29 96 -11 -15 36 15 -16 47 30 -15 32 55 -16 50 50 -0.13 -143 0 0 -16 13 56 4 53 25.1 30 96 -12 -15 38 17 -16 49 31 -15 34 57 -16 52 51 -0.13 -142 0 0 -16 15 34 4 53 18.1 31 96 -13 -15 39 56 -16 51 10 -15 36 36 -16 54 29 -0.13 -141 0 0 -16 16 50 4 53 10.9 32 96 -14 -15 41 12 -16 52 25 -15 37 52 -16 55 44 -0.13 -140 0 0 -16 17 43 4 53 3.6 33 95 -15 -15 42 5 -16 53 17 -15 38 46 -16 56 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233 -76 3 40 44 2 23 48 3 44 20 2 20 13 -0.14 - 54 0 0 3 26 35 4 35 19.8 62 233 -75 4 5 6 2 48 8 4 8 43 2 44 32 -0.14 - 53 0 0 3 51 1 4 35 6.6 61 234 -75 4 29 34 3 12 33 4 33 11 3 8 57 -0.14 - 52 0 0 4 15 33 4 34 53.5 60 234 -74 4 54 7 3 37 2 4 57 43 3 33 27 -0.14 - 51 0 0 4 40 8 4 34 40.6 59 235 -74 5 18 43 4 1 37 5 22 20 3 58 1 -0.14 - 50 0 0 5 4 47 4 34 27.8 58 235 -73 5 43 23 4 26 15 5 47 0 4 22 39 -0.14 - 49 0 0 5 29 29 4 34 15.1 57 235 -72 6 8 7 4 50 56 6 11 44 4 47 20 -0.14 - 48 0 0 5 54 14 4 34 2.6 56 236 -72 6 32 53 5 15 40 6 36 30 5 12 4 -0.14 - 47 0 0 6 19 2 4 33 50.2 55 236 -71 6 57 41 5 40 27 7 1 18 5 36 50 -0.14 - 46 0 0 6 43 50 4 33 37.9 54 236 -70 7 22 30 6 5 15 7 26 7 6 1 38 -0.14 - 45 0 0 7 8 40 4 33 25.9 53 237 -70 7 47 21 6 30 4 7 50 58 6 26 28 -0.14 - 44 0 0 7 33 31 4 33 14.0 52 237 -69 8 12 12 6 54 54 8 15 49 6 51 18 -0.14 - 43 0 0 7 58 21 4 33 2.2 51 238 -68 8 37 2 7 19 44 8 40 40 7 16 8 -0.14 - 42 0 0 8 23 11 4 32 50.6 50 238 -67 9 1 53 7 44 34 9 5 30 7 40 58 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23 21 12 59 4 -0.14 - 28 0 0 14 4 57 4 30 28.9 36 242 -55 14 43 30 13 26 28 14 47 6 13 22 52 -0.14 - 27 0 0 14 28 35 4 30 20.4 35 242 -54 15 7 6 13 50 7 15 10 43 13 46 32 -0.14 - 26 0 0 14 52 4 4 30 12.1 34 243 -53 15 30 34 14 13 38 15 34 10 14 10 3 -0.14 - 25 0 0 15 15 24 4 30 4.0 33 243 -52 15 53 52 14 37 0 15 57 28 14 33 24 -0.14 - 24 0 0 15 38 34 4 29 56.2 32 243 -51 16 17 1 15 0 11 16 20 37 14 56 36 -0.14 - 23 0 0 16 1 34 4 29 48.6 31 244 -50 16 39 59 15 23 13 16 43 34 15 19 38 -0.14 - 22 0 0 16 24 23 4 29 41.2 30 244 -49 17 2 46 15 46 4 17 6 21 15 42 29 -0.14 - 21 0 0 16 47 0 4 29 34.1 29 244 -48 17 25 21 16 8 43 17 28 56 16 5 9 -0.14 - 20 0 0 17 9 26 4 29 27.2 28 245 -48 17 47 45 16 31 11 17 51 20 16 27 37 -0.14 - 19 0 0 17 31 40 4 29 20.5 27 245 -47 18 9 56 16 53 27 18 13 31 16 49 53 -0.14 - 18 0 0 17 53 41 4 29 14.1 26 245 -46 18 31 55 17 15 31 18 35 30 17 11 57 -0.14 - 17 0 0 18 15 29 4 29 7.9 25 245 -45 18 53 41 17 37 21 18 57 15 17 33 48 -0.14 - 16 0 0 18 37 4 4 29 2.0 24 246 -44 19 15 13 17 58 59 19 18 47 17 55 25 -0.14 - 15 0 0 18 58 25 4 28 56.3 23 246 -43 19 36 32 18 20 22 19 40 6 18 16 49 -0.14 - 14 0 0 19 19 32 4 28 50.9 22 246 -42 19 57 36 18 41 31 20 1 9 18 37 59 -0.14 - 13 0 0 19 40 24 4 28 45.7 21 247 -41 20 18 25 19 2 26 20 21 59 18 58 54 -0.14 - 12 0 0 20 1 1 4 28 40.7 20 247 -40 20 39 0 19 23 6 20 42 33 19 19 34 -0.14 - 11 0 0 20 21 23 4 28 36.0 19 248 -39 20 59 19 19 43 31 21 2 52 19 39 59 -0.14 - 10 0 0 20 41 29 4 28 31.5 18 248 -38 21 19 22 20 3 40 21 22 55 20 0 8 -0.14 - 9 0 0 21 1 20 4 28 27.3 17 248 -37 21 39 10 20 23 34 21 42 42 20 20 2 -0.14 - 8 0 0 21 20 54 4 28 23.3 16 249 -37 21 58 41 20 43 11 22 2 13 20 39 39 -0.14 - 7 0 0 21 40 11 4 28 19.6 15 249 -36 22 17 55 21 2 31 22 21 27 20 59 0 -0.14 - 6 0 0 21 59 12 4 28 16.1 14 249 -35 22 36 52 21 21 35 22 40 24 21 18 4 -0.14 - 5 0 0 22 17 55 4 28 12.8 13 250 -34 22 55 33 21 40 21 22 59 4 21 36 51 -0.14 - 4 0 0 22 36 21 4 28 9.8 12 250 -33 23 13 55 21 58 50 23 17 26 21 55 20 -0.14 - 3 0 0 22 54 29 4 28 7.0 11 250 -32 23 32 0 22 17 1 23 35 31 22 13 32 -0.14 - 2 0 0 23 12 19 4 28 4.5 10 251 -31 23 49 47 22 34 55 23 53 17 22 31 25 -0.14 - 1 0 0 23 29 51 4 28 2.1 9 251 -30 24 7 15 22 52 30 24 10 45 22 49 0 -0.14 0 0 0 23 47 4 4 28 0.1 8 252 -29 24 24 25 23 9 46 24 27 55 23 6 17 -0.14 1 0 0 24 3 58 4 27 58.2 7 252 -28 24 41 16 23 26 44 24 44 46 23 23 15 -0.14 2 0 0 24 20 34 4 27 56.6 6 252 -28 24 57 49 23 43 23 25 1 18 23 39 54 -0.14 3 0 0 24 36 50 4 27 55.2 5 253 -27 25 14 1 23 59 42 25 17 30 23 56 14 -0.14 4 0 0 24 52 47 4 27 54.1 4 253 -26 25 29 55 24 15 42 25 33 23 24 12 15 -0.13 5 0 0 25 8 24 4 27 53.2 3 254 -25 25 45 29 24 31 23 25 48 57 24 27 56 -0.13 6 0 0 25 23 42 4 27 52.5 2 254 -24 26 0 43 24 46 44 26 4 11 24 43 17 -0.13 7 0 0 25 38 40 4 27 52.0 2 255 -23 26 15 38 25 1 45 26 19 5 24 58 18 -0.12 8 0 0 25 53 17 4 27 51.8 1 255 -22 26 30 12 25 16 26 26 33 39 25 12 59 -0.10 Uncertainty in time = +/- 1 secs Prediction of 2022 Dec 13.0 Data for the target star ------------------------ * name: UCAC4-385-052448 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 03 16.7076 DE: -13 06 52.968 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 03 16.7076 DE: -13 06 52.968 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (654) Zelinda asteroid class: approx. diameter [km]: 130 approx. diameter ["]: 0.213 distance from Earth [AU]: 0.84380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#122 date of fit: 2022 Nov 22 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", 0.004", 112.822° remarks: * orbital elements for (654)Zelinda : Mean anomaly = 7.6124414251 deg Arg. of pericenter = 214.5776092997 deg Long. of node = 278.3332564596 deg Inclination = 18.0938137165 deg Eccentricity = 0.2309311717 Semimajor axis = 2.2973618451 AU Perihelion dist = 1.7668293823 AU Mag: H = 8.66, G = 0.15 Epoch of elements : MJD 59989.19527778 TDT (2023 Feb 14.1953) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1222022Nov22,16.98,2023,2,14,4.693261,-0.041635,0.117707,-4.083877,-1.443597,0.000952,0.002261,0.000001,0.000000 -78.2512,-13.2070,113.14,-13.12,False UCAC4-385-052448,9.05464102,-13.1147132,0.00,12.41,0.00,0.0,0,,9.07319565,-13.2070198,0.16,0.00,0,0,0 654,Zelinda,10.39,130.3,0.8438,0,0,-2.913,-15.03,,6.2,0 0,7.5572,2023,2,14,214.5776,278.3333,18.0938,0.23093,2.29736,1.76683,8.66,5.0,0.15 1.047,0.0140,0.0043,113,0.0099,Known errors,-1.00,-1,-1,-1 20230214_052448,59926.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 13, 00:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org