IOTA/IOTA-ES occultation update for (3317) Paris / UCAC4 353-002455 event on 2024 Oct 01, 18:47 UT Visible from Summary ------- On 2024 Oct 01 UT, the 118.917 km diameter asteroid (3317) Paris will occult a 11.3 mag star in the constellation Cetus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.51 mag to 15.74 mag (the magnitude of the asteroid) for at most 6.910 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: 97 * date and approx. time of event: 2024 Oct 01, 18:41 - 2024 Oct 01, 18:53 * geocentric midpoint of event [JD]: 2460585.28319550 * magnitude of target star: 11.25 * magnitude drop [mag]: 4.51 * estimated maximum duration [s]: 6.910 * Moon: 1 % sunlit, 140° distance * Sun: 146° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 121 * 1 sigma uncertainty interval [path widths]: +/- 0.39 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.012) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.011", 78°) * approx speed of asteroid's shadow [km/s]: 17.2134 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 353-002455 by 3317 Paris on 2024 Oct 1 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 - 15 0 0 -50 8 45 18 53 50.0 0 121 2 .. .. .. -50 47 2 .. .. .. -51 17 6 .... - 14 0 0 -50 31 39 18 53 49.9 1 120 1 -49 53 43 -51 9 40 -49 24 2 -51 39 33 0.27 - 13 0 0 -50 53 48 18 53 49.8 2 119 1 -50 16 6 -51 31 35 -49 46 37 -52 1 17 0.24 - 12 0 0 -51 15 13 18 53 49.7 2 119 0 -50 37 46 -51 52 47 -50 8 28 -52 22 17 0.23 - 11 0 0 -51 35 57 18 53 49.4 3 118 0 -50 58 43 -52 13 16 -50 29 35 -52 42 36 0.22 - 10 0 0 -51 55 58 18 53 49.2 4 117 -1 -51 18 58 -52 33 4 -50 50 1 -53 2 13 0.22 - 9 0 0 -52 15 20 18 53 48.8 4 116 -2 -51 38 32 -52 52 12 -51 9 45 -53 21 11 0.21 - 8 0 0 -52 34 1 18 53 48.4 5 116 -2 -51 57 26 -53 10 41 -51 28 49 -53 39 29 0.21 - 7 0 0 -52 52 3 18 53 48.0 6 115 -3 -52 15 41 -53 28 31 -51 47 13 -53 57 9 0.21 - 6 0 0 -53 9 27 18 53 47.5 6 114 -3 -52 33 17 -53 45 43 -52 4 59 -54 14 12 0.21 - 5 0 0 -53 26 14 18 53 47.0 7 113 -4 -52 50 15 -54 2 18 -52 22 6 -54 30 38 0.21 - 4 0 0 -53 42 24 18 53 46.4 8 112 -4 -53 6 36 -54 18 16 -52 38 36 -54 46 27 0.21 - 3 0 0 -53 57 58 18 53 45.8 8 112 -5 -53 22 22 -54 33 39 -52 54 30 -55 1 42 0.21 - 2 0 0 -54 12 57 18 53 45.2 9 111 -5 -53 37 31 -54 48 28 -53 9 48 -55 16 21 0.21 - 1 0 0 -54 27 22 18 53 44.5 10 110 -6 -53 52 6 -55 2 42 -53 24 31 -55 30 27 0.21 0 0 0 -54 41 12 18 53 43.8 10 109 -6 -54 6 7 -55 16 22 -53 38 39 -55 44 0 0.21 1 0 0 -54 54 30 18 53 43.0 11 108 -7 -54 19 34 -55 29 30 -53 52 13 -55 57 0 0.21 2 0 0 -55 7 14 18 53 42.2 12 107 -7 -54 32 28 -55 42 6 -54 5 15 -56 9 29 0.21 3 0 0 -55 19 27 18 53 41.4 12 107 -8 -54 44 49 -55 54 10 -54 17 43 -56 21 25 0.21 4 0 0 -55 31 9 18 53 40.5 13 106 -8 -54 56 39 -56 5 42 -54 29 40 -56 32 51 0.21 5 0 0 -55 42 19 18 53 39.7 13 105 -9 -55 7 58 -56 16 45 -54 41 5 -56 43 47 0.21 6 0 0 -55 52 59 18 53 38.7 14 104 -9 -55 18 46 -56 27 17 -54 51 59 -56 54 13 0.21 7 0 0 -56 3 9 18 53 37.8 14 103 -10 -55 29 4 -56 37 19 -55 2 23 -57 4 10 0.21 8 0 0 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169 0 0 23 9 8 18 41 54.7 13 242 1 23 47 6 22 31 5 24 16 47 22 1 10 0.22 170 0 0 23 41 6 18 41 53.2 12 243 1 24 18 50 23 3 16 24 48 21 22 33 33 0.22 171 0 0 24 12 10 18 41 51.9 10 243 2 24 49 40 23 34 34 25 19 1 23 5 1 0.22 172 0 0 24 42 21 18 41 50.8 9 243 3 25 19 38 24 4 58 25 48 48 23 35 36 0.22 173 0 0 25 11 38 18 41 49.7 8 244 4 25 48 43 24 34 29 26 17 43 24 5 17 0.23 174 0 0 25 40 4 18 41 48.8 7 244 5 26 16 56 25 3 7 26 45 46 24 34 5 0.23 175 0 0 26 7 37 18 41 48.0 6 245 6 26 44 17 25 30 53 27 12 57 25 2 1 0.23 176 0 0 26 34 20 18 41 47.3 5 245 6 27 10 47 25 57 47 27 39 18 25 29 5 0.24 177 0 0 27 0 11 18 41 46.8 4 246 7 27 36 27 26 23 50 28 4 49 25 55 17 0.25 178 0 0 27 25 12 18 41 46.3 3 246 8 28 1 16 26 49 3 28 29 29 26 20 39 0.26 179 0 0 27 49 24 18 41 46.0 2 246 9 28 25 17 27 13 26 28 53 21 26 45 11 0.29 180 0 0 28 12 46 18 41 45.8 2 247 10 28 48 28 27 36 59 29 16 24 27 8 52 0.34 -179 0 0 28 35 20 18 41 45.7 1 247 11 29 10 51 27 59 43 29 38 39 27 31 45 0.58 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 353-002455 * constellation : Cetus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 15 22.8391 DE: -19 35 56.358 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 15 22.8392 DE: -19 35 56.358 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.3 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3317) Paris asteroid class: approx. diameter [km]: 119 approx. diameter ["]: 0.038 distance from Earth [AU]: 4.35950 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#64 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): 0.022", 0.011", 78.376° remarks: * orbital elements for (3317)Paris : Mean anomaly = 81.6285018741 deg Arg. of pericenter = 151.1241523063 deg Long. of node = 135.8926084586 deg Inclination = 27.8517538996 deg Eccentricity = 0.1283276954 Semimajor axis = 5.2290922812 AU Perihelion dist = 4.5580549195 AU Mag: H = 8.47, G = 0.15 Epoch of elements : MJD 60584.78319542 TDT (2024 Oct 01.7832) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#642023Feb10,6.91,2024,10,1,18.796692,0.138042,-0.151381,-7.176488,-6.549298,-0.002610,0.002150,0.000001,0.000001 101.1985,-19.4807,-104.60,-3.60,False UCAC4 353-002455,2.25634420,-19.5989882,11.70,11.25,11.01,0.0,0,,2.27601865,-19.4806622,4.50,4.30,0,0,0 3317,Paris,15.74,118.917,4.3595,0,0,-1.024,-13.21,,7.4,0 0,81.5639,2024,10,1,151.1242,135.8926,27.8518,0.12833,5.22909,4.55805,8.47,5.0,0.15 1.392,0.0217,0.0113,78,0.0148,Known errors,1.08,0,-1,-1 20241001_002455,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org