IOTA/IOTA-ES occultation update for (9) Metis / UCAC4 593-025195 event on 2024 Mar 10, 01:18 UT Visible from Summary ------- On 2024 Mar 10 UT, the 169.635 km diameter asteroid (9) Metis will occult a 11.9 mag star in the constellation Auriga for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.25 mag to 10.41 mag (the magnitude of the asteroid) for at most 12.190 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: 2024 Mar 10, 01:10 - 2024 Mar 10, 01:25 * geocentric midpoint of event [JD]: 2460379.55424188 * magnitude of target star: 11.86 * magnitude drop [mag]: 0.25 * estimated maximum duration [s]: 12.190 * Moon: 0 % sunlit, 104° distance * Sun: 100° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 176 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.010", 83°) * approx speed of asteroid's shadow [km/s]: 13.9169 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 593-025195 by 9 Metis on 2024 Mar 10 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 166 0 0 14 53 42 1 10 44.4 0 60 71 .. .. .. 15 48 57 .. .. .. 15 57 41 .... 167 0 0 15 26 53 1 10 44.5 1 61 71 14 31 54 16 22 9 14 23 16 16 30 53 -0.30 168 0 0 16 0 2 1 10 44.9 2 61 70 15 5 2 16 55 20 14 56 24 17 4 4 -0.29 169 0 0 16 33 10 1 10 45.4 4 61 69 15 38 9 17 28 29 15 29 30 17 37 14 -0.29 170 0 0 17 6 15 1 10 46.0 5 62 68 16 11 13 18 1 35 16 2 34 18 10 19 -0.29 171 0 0 17 39 16 1 10 46.9 6 62 68 16 44 13 18 34 36 16 35 34 18 43 21 -0.29 172 0 0 18 12 12 1 10 47.9 7 62 67 17 17 9 19 7 32 17 8 30 19 16 17 -0.29 173 0 0 18 45 2 1 10 49.1 8 63 66 17 49 59 19 40 22 17 41 20 19 49 7 -0.29 174 0 0 19 17 45 1 10 50.4 9 63 65 18 22 43 20 13 5 18 14 4 20 21 50 -0.29 175 0 0 19 50 21 1 10 52.0 10 63 64 18 55 20 20 45 39 18 46 41 20 54 24 -0.29 176 0 0 20 22 48 1 10 53.7 11 64 63 19 27 48 21 18 5 19 19 9 21 26 49 -0.29 177 0 0 20 55 5 1 10 55.5 12 64 62 20 0 6 21 50 20 19 51 28 21 59 4 -0.29 178 0 0 21 27 11 1 10 57.5 13 64 62 20 32 15 22 22 24 20 23 37 22 31 8 -0.29 179 0 0 21 59 6 1 10 59.7 15 65 61 21 4 12 22 54 17 20 55 34 23 3 0 -0.29 -180 0 0 22 30 48 1 11 2.0 16 65 60 21 35 57 23 25 56 21 27 19 23 34 39 -0.29 -179 0 0 23 2 17 1 11 4.5 17 65 59 22 7 29 23 57 22 21 58 52 24 6 4 -0.29 -178 0 0 23 33 32 1 11 7.1 18 66 58 22 38 47 24 28 33 22 30 11 24 37 15 -0.29 -177 0 0 24 4 31 1 11 9.8 19 66 57 23 9 50 24 59 29 23 1 15 25 8 11 -0.29 -176 0 0 24 35 15 1 11 12.7 20 67 56 23 40 38 25 30 9 23 32 3 25 38 50 -0.29 -175 0 0 25 5 43 1 11 15.8 21 67 55 24 11 10 26 0 32 24 2 35 26 9 12 -0.29 -174 0 0 25 35 53 1 11 18.9 22 68 54 24 41 25 26 30 38 24 32 51 26 39 17 -0.29 -173 0 0 26 5 45 1 11 22.2 23 68 53 25 11 22 27 0 25 25 2 49 27 9 3 -0.29 -172 0 0 26 35 18 1 11 25.7 24 69 52 25 41 0 27 29 53 25 32 28 27 38 30 -0.29 -171 0 0 27 4 32 1 11 29.2 25 69 51 26 10 19 27 59 1 26 1 48 28 7 38 -0.29 -170 0 0 27 33 26 1 11 32.9 26 70 50 26 39 19 28 27 49 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32 52 16 30 57 42 33 0 41 -0.29 - 41 0 0 31 33 49 1 23 35.9 40 283 -55 30 40 42 32 27 11 30 32 20 32 35 37 -0.29 - 40 0 0 31 8 11 1 23 41.1 39 283 -56 30 14 56 32 1 41 30 6 34 32 10 9 -0.29 - 39 0 0 30 42 9 1 23 46.1 38 284 -57 29 48 47 31 35 47 29 40 23 31 44 15 -0.29 - 38 0 0 30 15 43 1 23 51.1 37 285 -58 29 22 13 31 9 28 29 13 49 31 17 58 -0.29 - 37 0 0 29 48 53 1 23 56.0 36 285 -59 28 55 16 30 42 45 28 46 50 30 51 16 -0.29 - 36 0 0 29 21 40 1 24 0.9 35 286 -60 28 27 56 30 15 39 28 19 29 30 24 11 -0.29 - 35 0 0 28 54 4 1 24 5.6 34 287 -61 28 0 13 29 48 10 27 51 45 29 56 43 -0.29 - 34 0 0 28 26 5 1 24 10.3 33 287 -61 27 32 8 29 20 18 27 23 40 29 28 52 -0.29 - 33 0 0 27 57 45 1 24 14.8 32 288 -62 27 3 42 28 52 5 26 55 12 29 0 40 -0.29 - 32 0 0 27 29 4 1 24 19.3 31 288 -63 26 34 54 28 23 29 26 26 24 28 32 5 -0.29 - 31 0 0 27 0 2 1 24 23.6 30 289 -64 26 5 46 27 54 33 25 57 15 28 3 10 -0.29 - 30 0 0 26 30 39 1 24 27.9 29 289 -65 25 36 19 27 25 16 25 27 46 27 33 54 -0.29 - 29 0 0 26 0 58 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29 37 13 36 50 -0.63 - 3 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 12 54 58 .. .. .. 13 3 40 .... Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 593-025195 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 57 48.1495 DE: +28 31 56.936 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 57 48.1495 DE: +28 31 56.936 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9) Metis asteroid class: approx. diameter [km]: 170 approx. diameter ["]: 0.134 distance from Earth [AU]: 1.74870 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#133 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): 0.025", 0.010", 83.3° remarks: * orbital elements for (9)Metis : Mean anomaly = 33.3262745787 deg Arg. of pericenter = 5.7283516576 deg Long. of node = 68.8690036222 deg Inclination = 5.5782017757 deg Eccentricity = 0.1228150881 Semimajor axis = 2.3857613675 AU Perihelion dist = 2.0927538750 AU Mag: H = 6.32, G = 0.17 Epoch of elements : MJD 60379.05424188 TDT (2024 Mar 10.0542) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1332023Apr24,12.19,2024,3,10,1.301805,0.006865,0.262284,7.852252,-0.210556,0.005465,-0.000076,0.000000,0.000000 -97.9081,28.5364,163.04,-3.97,False UCAC4 593-025195,5.96337490,28.5324821,12.31,11.86,11.62,0.0,0,,5.98890758,28.5364230,0.25,0.21,0,0,0 9,Metis,10.41,169.635,1.7487,0,0,2.997,-1.06,,10.6,0 0,33.0443,2024,3,9,5.7284,68.8690,5.5782,0.12282,2.38576,2.09275,6.32,5.0,0.15 1.079,0.0253,0.0100,83,0.0105,Known errors,1.27,0,-1,-1 20240310_025195,60139.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org