IOTA/IOTA-ES occultation update for (2617) Jiangxi / UCAC4 292-184537 event on 2024 Jul 18, 03:12 UT Visible from Summary ------- On 2024 Jul 18 UT, the 55.894 km diameter asteroid (2617) Jiangxi will occult a 11.4 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.61 mag to 15.95 mag (the magnitude of the asteroid) for at most 3.930 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 Jul 18, 03:05 - 2024 Jul 18, 03:19 * geocentric midpoint of event [JD]: 2460509.63388716 * magnitude of target star: 11.36 * magnitude drop [mag]: 4.61 * estimated maximum duration [s]: 3.930 * Moon: 86 % sunlit, 24° distance * Sun: 159° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 60 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.001", 102°) * approx speed of asteroid's shadow [km/s]: 14.2190 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 292-184537 by 2617 Jiangxi on 2024 Jul 18 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 -176 0 0 -26 59 13 3 19 43.4 1 126 20 -26 39 10 -27 19 19 -26 30 34 -27 27 58 .... -175 0 0 -27 38 11 3 19 43.2 2 125 19 -27 18 8 -27 58 16 -27 9 33 -28 6 55 0.38 -174 0 0 -28 16 52 3 19 42.8 3 125 18 -27 56 50 -28 36 57 -27 48 15 -28 45 35 0.38 -173 0 0 -28 55 14 3 19 42.3 4 124 17 -28 35 14 -29 15 18 -28 26 39 -29 23 57 0.38 -172 0 0 -29 33 18 3 19 41.5 5 124 16 -29 13 18 -29 53 21 -29 4 44 -30 1 59 0.38 -171 0 0 -30 11 1 3 19 40.6 6 123 15 -29 51 2 -30 31 2 -29 42 28 -30 39 40 0.38 -170 0 0 -30 48 22 3 19 39.6 7 123 14 -30 28 25 -31 8 22 -30 19 51 -31 16 59 0.39 -169 0 0 -31 25 21 3 19 38.4 8 122 13 -31 5 25 -31 45 19 -30 56 52 -31 53 56 0.39 -168 0 0 -32 1 56 3 19 37.0 9 122 12 -31 42 2 -32 21 53 -31 33 30 -32 30 29 0.39 -167 0 0 -32 38 7 3 19 35.5 10 121 11 -32 18 15 -32 58 2 -32 9 44 -33 6 37 0.39 -166 0 0 -33 13 53 3 19 33.9 11 121 10 -32 54 3 -33 33 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57 11 0.40 5 0 0 -27 50 41 3 6 56.7 30 247 -44 -27 30 45 -28 10 40 -27 22 11 -28 19 17 0.40 6 0 0 -27 12 29 3 6 52.3 29 247 -43 -26 52 32 -27 32 29 -26 43 59 -27 41 5 0.40 7 0 0 -26 34 2 3 6 47.9 28 246 -42 -26 14 5 -26 54 2 -26 5 32 -27 2 38 0.40 8 0 0 -25 55 20 3 6 43.7 27 246 -41 -25 35 24 -26 15 21 -25 26 50 -26 23 57 0.40 9 0 0 -25 16 26 3 6 39.7 25 245 -40 -24 56 30 -25 36 26 -24 47 56 -25 45 3 0.40 10 0 0 -24 37 21 3 6 35.7 24 245 -39 -24 17 24 -24 57 20 -24 8 51 -25 5 57 0.40 11 0 0 -23 58 5 3 6 31.9 23 244 -38 -23 38 9 -24 18 4 -23 29 36 -24 26 40 0.40 12 0 0 -23 18 40 3 6 28.3 22 244 -37 -22 58 44 -23 38 38 -22 50 12 -23 47 14 0.40 13 0 0 -22 39 7 3 6 24.8 21 243 -36 -22 19 12 -22 59 4 -22 10 40 -23 7 40 0.41 14 0 0 -21 59 27 3 6 21.4 20 243 -35 -21 39 34 -22 19 24 -21 31 2 -22 28 0 0.41 15 0 0 -21 19 43 3 6 18.2 19 242 -34 -20 59 51 -21 39 39 -20 51 19 -21 48 14 0.41 16 0 0 -20 39 55 3 6 15.2 18 242 -33 -20 20 4 -20 59 50 -20 11 33 -21 8 24 0.41 17 0 0 -20 0 5 3 6 12.4 17 242 -32 -19 40 15 -20 19 58 -19 31 45 -20 28 32 0.41 18 0 0 -19 20 14 3 6 9.7 15 241 -31 -19 0 26 -19 40 5 -18 51 56 -19 48 38 0.41 19 0 0 -18 40 23 3 6 7.2 14 241 -30 -18 20 37 -19 0 13 -18 12 8 -19 8 45 0.41 20 0 0 -18 0 35 3 6 4.9 13 240 -29 -17 40 51 -18 20 23 -17 32 23 -18 28 54 0.42 21 0 0 -17 20 50 3 6 2.7 12 240 -28 -17 1 7 -17 40 35 -16 52 40 -17 49 6 0.42 22 0 0 -16 41 9 3 6 0.8 11 240 -27 -16 21 29 -17 0 53 -16 13 3 -17 9 22 0.42 23 0 0 -16 1 35 3 5 59.0 10 240 -26 -15 41 57 -16 21 16 -15 33 32 -16 29 45 0.43 24 0 0 -15 22 8 3 5 57.5 9 239 -25 -15 2 33 -15 41 47 -14 54 9 -15 50 14 0.43 25 0 0 -14 42 51 3 5 56.1 7 239 -24 -14 23 18 -15 2 27 -14 14 55 -15 10 53 0.44 26 0 0 -14 3 43 3 5 54.9 6 239 -23 -13 44 13 -14 23 16 -13 35 51 -14 31 42 0.45 27 0 0 -13 24 48 3 5 53.9 5 239 -21 -13 5 20 -13 44 18 -12 57 0 -13 52 42 0.47 28 0 0 -12 46 5 3 5 53.1 4 238 -20 -12 26 41 -13 5 32 -12 18 21 -13 13 55 0.49 29 0 0 -12 7 36 3 5 52.6 3 238 -19 -11 48 15 -12 27 1 -11 39 57 -12 35 22 0.53 30 0 0 -11 29 24 3 5 52.2 2 238 -18 -11 10 6 -11 48 45 -11 1 49 -11 57 4 0.64 31 0 0 -10 51 28 3 5 52.0 0 238 -17 -10 32 13 -11 10 45 -10 23 57 -11 19 4 1.29 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 292-184537 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 29 01.3046 DE: -31 47 19.065 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 29 01.3046 DE: -31 47 19.065 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.4 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2617) Jiangxi asteroid class: approx. diameter [km]: 56 approx. diameter ["]: 0.029 distance from Earth [AU]: 2.68600 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.017", 0.001", 101.83° remarks: * orbital elements for (2617)Jiangxi : Mean anomaly = 238.5662306358 deg Arg. of pericenter = 350.2053342173 deg Long. of node = 73.2070260092 deg Inclination = 12.9687251335 deg Eccentricity = 0.2384797598 Semimajor axis = 3.1526420229 AU Perihelion dist = 2.4008007107 AU Mag: H = 10.53, G = 0.15 Epoch of elements : MJD 60509.13388745 TDT (2024 Jul 18.1339) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,3.93,2024,7,18,3.213292,0.062182,-0.369201,-7.914114,-1.332932,0.001867,0.000896,0.000001,0.000000 -66.9677,-31.7733,133.38,20.95,False UCAC4 292-184537,18.48369572,-31.7886291,12.00,11.36,11.01,0.0,0,,18.51063465,-31.7732746,4.60,4.50,0,0,0 2617,Jiangxi,15.95,55.894,2.6860,0,0,-2.031,-4.36,,3.0,0 0,238.5427,2024,7,18,350.2053,73.2070,12.9687,0.23848,3.15264,2.40080,10.53,5.0,0.15 1.215,0.0167,0.0012,102,0.0062,Known errors,0.59,0,-1,-1 20240718_184537,60140.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org