IOTA/IOTA-ES occultation update for (158) Koronis / TYC 6333-02026-1 event on 2024 Jul 11, 05:21 UT Visible from Summary ------- On 2024 Jul 11 UT, the 35.846933927528 km diameter asteroid (158) Koronis will occult a 9.3 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.21 mag to 13.46 mag (the magnitude of the asteroid) for at most 3.200 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 11, 05:14 - 2024 Jul 11, 05:28 * geocentric midpoint of event [JD]: 2460502.72333617 * magnitude of target star: 9.27 * magnitude drop [mag]: 4.21 * estimated maximum duration [s]: 3.200 * Moon: 26 % sunlit, 134° distance * Sun: 165° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 49 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.006", 75°) * approx speed of asteroid's shadow [km/s]: 11.2625 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6333-02026-1 by 158 Koronis on 2024 Jul 11 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 -179 0 0 -51 8 52 5 28 30.7 0 120 -12 -50 53 40 -51 24 8 -50 46 47 -51 31 6 .... -178 0 0 -51 30 50 5 28 30.5 1 119 -13 -51 15 39 -51 46 5 -51 8 47 -51 53 2 0.79 -177 0 0 -51 52 31 5 28 30.3 2 118 -13 -51 37 21 -52 7 45 -51 30 29 -52 14 41 0.84 -176 0 0 -52 13 54 5 28 29.9 3 118 -14 -51 58 46 -52 29 7 -51 51 55 -52 36 3 0.86 -175 0 0 -52 35 0 5 28 29.4 3 117 -15 -52 19 53 -52 50 12 -52 13 3 -52 57 7 0.87 -174 0 0 -52 55 49 5 28 28.8 4 116 -15 -52 40 42 -53 10 59 -52 33 53 -53 17 53 0.88 -173 0 0 -53 16 19 5 28 28.1 5 115 -16 -53 1 14 -53 31 28 -52 54 25 -53 38 22 0.89 -172 0 0 -53 36 31 5 28 27.3 5 114 -17 -53 21 28 -53 51 39 -53 14 39 -53 58 32 0.89 -171 0 0 -53 56 25 5 28 26.4 6 114 -17 -53 41 23 -54 11 31 -53 34 35 -54 18 23 0.89 -170 0 0 -54 16 0 5 28 25.4 7 113 -18 -54 1 0 -54 31 4 -53 54 13 -54 37 56 0.89 -169 0 0 -54 35 17 5 28 24.3 7 112 -19 -54 20 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58 5 14 58.1 12 256 -2 -33 49 23 -34 18 37 -33 42 48 -34 25 17 0.96 27 0 0 -33 40 2 5 14 55.6 11 255 -1 -33 25 29 -33 54 38 -33 18 54 -34 1 17 0.96 28 0 0 -33 16 17 5 14 53.3 10 254 0 -33 1 46 -33 30 52 -32 55 12 -33 37 29 0.96 29 0 0 -32 52 45 5 14 51.2 9 254 1 -32 38 16 -33 7 17 -32 31 43 -33 13 54 0.97 30 0 0 -32 29 25 5 14 49.3 8 253 2 -32 14 58 -32 43 55 -32 8 26 -32 50 31 0.98 31 0 0 -32 6 19 5 14 47.5 8 253 3 -31 51 54 -32 20 47 -31 45 23 -32 27 22 0.99 32 0 0 -31 43 27 5 14 46.0 7 252 4 -31 29 5 -31 57 54 -31 22 35 -32 4 28 1.00 33 0 0 -31 20 51 5 14 44.6 6 252 5 -31 6 30 -31 35 15 -31 0 1 -31 41 48 1.01 34 0 0 -30 58 29 5 14 43.5 5 251 6 -30 44 11 -31 12 52 -30 37 43 -31 19 24 1.03 35 0 0 -30 36 25 5 14 42.5 4 251 6 -30 22 8 -30 50 44 -30 15 41 -30 57 16 1.06 36 0 0 -30 14 36 5 14 41.8 3 250 7 -30 0 22 -30 28 54 -29 53 56 -30 35 25 1.11 37 0 0 -29 53 6 5 14 41.2 2 250 8 -29 38 54 -30 7 22 -29 32 28 -30 13 51 1.21 38 0 0 -29 31 53 5 14 40.9 1 249 9 -29 17 43 -29 46 7 -29 11 19 -29 52 36 1.49 39 0 0 -29 10 59 5 14 40.7 0 249 10 -28 56 51 -29 25 11 .. .. .. -29 31 39 7.30 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6333-02026-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 25 03.9013 DE: -18 42 04.879 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 25 03.9013 DE: -18 42 04.879 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 9.3 * B mag [mag]: 9.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (158) Koronis asteroid class: approx. diameter [km]: 36 approx. diameter ["]: 0.025 distance from Earth [AU]: 1.95880 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.019", 0.006", 75.333° remarks: * orbital elements for (158)Koronis : Mean anomaly = 239.2149932972 deg Arg. of pericenter = 147.1705034932 deg Long. of node = 277.6460427360 deg Inclination = 1.0057012608 deg Eccentricity = 0.0532398428 Semimajor axis = 2.8685157920 AU Perihelion dist = 2.7157964621 AU Mag: H = 9.22, G = 0.15 Epoch of elements : MJD 60502.22333667 TDT (2024 Jul 11.2233) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,3.20,2024,7,11,5.360068,0.141030,-0.663560,-6.217847,-1.322211,-0.001373,-0.000390,0.000001,0.000000 -63.3945,-18.6211,101.00,22.03,False TYC 6333-02026-1,20.41775035,-18.7013554,9.49,9.27,9.15,0.1,0,,20.44153139,-18.6210535,4.21,3.89,0,0,0 158,Koronis,13.46,35.989,1.9588,0,0,-1.964,-5.94,,2.0,0 0,239.1697,2024,7,11,147.1705,277.6460,1.0057,0.05324,2.86852,2.71580,9.22,5.0,0.15 1.227,0.0190,0.0057,75,0.0057,Known errors,2.25,0,-1,-1 20240711_2026-1,60140.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org