IOTA/IOTA-ES occultation update for (4907) Zoser / UCAC4 504-051555 event on 2024 Nov 03, 18:42 UT Visible from Summary ------- On 2024 Nov 03 UT, the 22.372 km diameter asteroid (4907) Zoser will occult a 11.0 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.27 mag to 18.31 mag (the magnitude of the asteroid) for at most 0.850 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 Nov 03, 18:38 - 2024 Nov 03, 18:45 * geocentric midpoint of event [JD]: 2460618.27931362 * magnitude of target star: 11.04 * magnitude drop [mag]: 7.27 * estimated maximum duration [s]: 0.850 * Moon: 5 % sunlit, 94° distance * Sun: 70° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.002", 105°) * approx speed of asteroid's shadow [km/s]: 26.2634 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 504-051555 by 4907 Zoser on 2024 Nov 3 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 103 0 0 -10 32 48 18 38 38.1 0 79 -53 -10 39 47 -10 25 49 -10 43 34 -10 22 3 .... 104 0 0 -10 21 50 18 38 38.2 1 79 -52 -10 28 49 -10 14 53 -10 32 36 -10 11 6 0.23 105 0 0 -10 11 15 18 38 38.3 2 79 -52 -10 18 13 -10 4 17 -10 22 0 -10 0 31 0.37 106 0 0 -10 1 2 18 38 38.5 3 79 -51 -10 7 59 - 9 54 5 -10 11 46 - 9 50 18 0.42 107 0 0 - 9 51 11 18 38 38.8 4 79 -50 - 9 58 8 - 9 44 14 -10 1 55 - 9 40 28 0.45 108 0 0 - 9 41 42 18 38 39.2 5 78 -50 - 9 48 39 - 9 34 46 - 9 52 25 - 9 31 0 0.46 109 0 0 - 9 32 36 18 38 39.7 6 78 -49 - 9 39 33 - 9 25 40 - 9 43 19 - 9 21 55 0.47 110 0 0 - 9 23 53 18 38 40.2 7 78 -48 - 9 30 49 - 9 16 58 - 9 34 35 - 9 13 12 0.48 111 0 0 - 9 15 33 18 38 40.9 8 78 -48 - 9 22 29 - 9 8 38 - 9 26 15 - 9 4 53 0.49 112 0 0 - 9 7 36 18 38 41.6 9 78 -47 - 9 14 31 - 9 0 41 - 9 18 17 - 8 56 56 0.49 113 0 0 - 9 0 2 18 38 42.4 10 78 -46 - 9 6 57 - 8 53 8 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6 25 -18 5 12 -17 50 39 -18 9 9 -17 46 43 0.53 -172 0 0 -18 18 4 18 42 40.0 61 4 26 -18 25 21 -18 10 47 -18 29 18 -18 6 50 0.53 -171 0 0 -18 38 25 18 42 44.3 61 2 27 -18 45 42 -18 31 8 -18 49 40 -18 27 11 0.53 -170 0 0 -18 58 58 18 42 48.6 61 360 28 -19 6 17 -18 51 41 -19 10 15 -18 47 43 0.53 -169 0 0 -19 19 44 18 42 52.9 60 358 29 -19 27 3 -19 12 26 -19 31 1 -19 8 28 0.53 -168 0 0 -19 40 41 18 42 57.1 60 356 30 -19 48 0 -19 33 22 -19 51 59 -19 29 24 0.53 -167 0 0 -20 1 48 18 43 1.3 59 354 31 -20 9 8 -19 54 29 -20 13 7 -19 50 31 0.53 -166 0 0 -20 23 6 18 43 5.5 59 352 32 -20 30 26 -20 15 46 -20 34 25 -20 11 48 0.53 -165 0 0 -20 44 33 18 43 9.7 58 350 33 -20 51 54 -20 37 13 -20 55 54 -20 33 14 0.53 -164 0 0 -21 6 10 18 43 13.8 58 348 34 -21 13 31 -20 58 49 -21 17 31 -20 54 50 0.53 -163 0 0 -21 27 55 18 43 17.9 57 347 35 -21 35 17 -21 20 34 -21 39 17 -21 16 34 0.53 -162 0 0 -21 49 48 18 43 22.0 57 345 36 -21 57 10 -21 42 26 -22 1 10 -21 38 27 0.53 -161 0 0 -22 11 48 18 43 26.0 56 343 37 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28 -39 0 54 -39 19 26 -38 56 56 0.53 -112 0 0 -39 25 19 18 45 36.2 16 299 65 -39 32 36 -39 18 2 -39 36 33 -39 14 5 0.53 -111 0 0 -39 42 11 18 45 37.3 15 298 65 -39 49 28 -39 34 55 -39 53 25 -39 30 59 0.53 -110 0 0 -39 58 48 18 45 38.3 15 297 65 -40 6 4 -39 51 33 -40 10 1 -39 47 37 0.53 -109 0 0 -40 15 9 18 45 39.2 14 297 65 -40 22 25 -40 7 55 -40 26 21 -40 3 59 0.53 -108 0 0 -40 31 15 18 45 40.1 13 296 65 -40 38 30 -40 24 1 -40 42 26 -40 20 5 0.53 -107 0 0 -40 47 4 18 45 40.9 12 295 65 -40 54 18 -40 39 51 -40 58 14 -40 35 56 0.53 -106 0 0 -41 2 38 18 45 41.7 11 295 64 -41 9 51 -40 55 25 -41 13 47 -40 51 30 0.53 -105 0 0 -41 17 55 18 45 42.4 11 294 64 -41 25 8 -41 10 43 -41 29 3 -41 6 48 0.53 -104 0 0 -41 32 56 18 45 43.1 10 293 64 -41 40 8 -41 25 44 -41 44 3 -41 21 50 0.53 -103 0 0 -41 47 40 18 45 43.7 9 293 64 -41 54 52 -41 40 29 -41 58 46 -41 36 35 0.53 -102 0 0 -42 2 8 18 45 44.3 8 292 63 -42 9 19 -41 54 58 -42 13 13 -41 51 4 0.54 -101 0 0 -42 16 20 18 45 44.8 7 291 63 -42 23 30 -42 9 10 -42 27 24 -42 5 17 0.54 -100 0 0 -42 30 14 18 45 45.2 7 291 62 -42 37 24 -42 23 5 -42 41 18 -42 19 12 0.54 - 99 0 0 -42 43 52 18 45 45.6 6 290 62 -42 51 2 -42 36 44 -42 54 55 -42 32 51 0.54 - 98 0 0 -42 57 14 18 45 46.0 5 289 62 -43 4 22 -42 50 6 -43 8 15 -42 46 14 0.54 - 97 0 0 -43 10 18 18 45 46.3 4 289 61 -43 17 26 -43 3 11 -43 21 19 -42 59 19 0.55 - 96 0 0 -43 23 6 18 45 46.5 4 288 61 -43 30 13 -43 15 59 -43 34 5 -43 12 8 0.55 - 95 0 0 -43 35 36 18 45 46.7 3 287 60 -43 42 43 -43 28 30 -43 46 35 -43 24 39 0.56 - 94 0 0 -43 47 50 18 45 46.9 2 287 60 -43 54 56 -43 40 45 -43 58 48 -43 36 54 0.57 - 93 0 0 -43 59 47 18 45 47.0 1 286 59 -44 6 53 -43 52 42 -44 10 44 -43 48 52 0.60 - 92 0 0 -44 11 27 18 45 47.0 1 285 59 -44 18 32 -44 4 23 -44 22 23 -44 0 33 0.71 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 504-051555 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 14 51.1682 DE: +10 36 49.618 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 14 51.1684 DE: +10 36 49.617 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.0 * B mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4907) Zoser asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.010 distance from Earth [AU]: 3.21430 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 date of fit: 2023 Feb 10 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): 0.018", 0.002", 104.511° remarks: * orbital elements for (4907)Zoser : Mean anomaly = 50.1790138820 deg Arg. of pericenter = 299.0848696572 deg Long. of node = 136.2689755703 deg Inclination = 5.9848493783 deg Eccentricity = 0.0879310501 Semimajor axis = 3.1806357218 AU Perihelion dist = 2.9009590828 AU Mag: H = 12.44, G = 0.15 Epoch of elements : MJD 60617.77931354 TDT (2024 Nov 03.7793) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Feb10,0.85,2024,11,3,18.703527,-0.138313,-0.446417,14.162552,-4.378041,-0.005205,0.001987,-0.000001,0.000000 -170.0260,10.4917,-104.66,-15.39,False UCAC4 504-051555,10.24754670,10.6137830,11.33,11.04,10.88,0.0,0,,10.26937583,10.4917248,7.27,6.98,0,0,0 4907,Zoser,18.31,22.372,3.2143,0,0,2.628,-11.98,,1.4,0 0,50.0436,2024,11,3,299.0849,136.2690,5.9848,0.08793,3.18064,2.90096,12.44,5.0,0.15 1.271,0.0183,0.0025,105,0.0026,Known errors,1.04,0,-1,-1 20241103_051555,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org