IOTA/IOTA-ES occultation update for (3339) Treshnikov / G201920.7-325829 event on 2024 Nov 17, 00:11 UT Visible from Summary ------- On 2024 Nov 17 UT, the 34.4781476674237 km diameter asteroid (3339) Treshnikov will occult a 9.0 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 8.32 mag to 17.35 mag (the magnitude of the asteroid) for at most 1.640 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 Nov 17, 00:07 - 2024 Nov 17, 00:14 * geocentric midpoint of event [JD]: 2460631.50793808 * magnitude of target star: 9.03 * magnitude drop [mag]: 8.32 * estimated maximum duration [s]: 1.640 * Moon: 98 % sunlit, 131° distance * Sun: 65° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 51 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.004", 92°) * approx speed of asteroid's shadow [km/s]: 29.6166 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of G201920.7-325829 by 3339 Treshnikov on 2024 Nov 17 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 158 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 2 3 16 .. .. .. ... .. .. ... .. .. .... 159 0 0 1 53 40 0 8 3.3 1 123 64 1 37 9 2 10 13 1 24 28 2 22 59 1 46 39 2 0 42 .... 160 0 0 1 15 18 0 8 3.5 2 123 65 0 58 51 1 31 46 0 46 13 1 44 28 1 8 18 1 22 17 -0.17 161 0 0 0 37 29 0 8 3.7 3 123 66 0 21 7 0 53 54 0 8 32 1 6 32 0 30 31 0 44 27 -0.24 162 0 0 0 0 16 0 8 4.0 4 123 67 - 0 16 2 0 16 36 - 0 28 34 0 29 12 - 0 6 40 0 7 12 -0.27 163 0 0 - 0 36 21 0 8 4.4 6 123 69 - 0 52 35 - 0 20 5 - 1 5 3 - 0 7 33 - 0 43 15 - 0 29 27 -0.29 164 0 0 - 1 12 22 0 8 4.9 7 123 70 - 1 28 32 - 0 56 10 - 1 40 56 - 0 43 42 - 1 19 14 - 1 5 29 -0.30 165 0 0 - 1 47 45 0 8 5.5 8 123 71 - 2 3 51 - 1 31 38 - 2 16 12 - 1 19 12 - 1 54 36 - 1 40 54 -0.31 166 0 0 - 2 22 31 0 8 6.2 9 123 71 - 2 38 32 - 2 6 28 - 2 50 50 - 1 54 6 - 2 29 19 - 2 15 42 -0.31 167 0 0 - 2 56 37 0 8 7.0 10 123 72 - 3 12 34 - 2 40 39 - 3 24 49 - 2 28 20 - 3 3 24 - 2 49 50 -0.32 168 0 0 - 3 30 5 0 8 7.8 11 123 73 - 3 45 58 - 3 14 11 - 3 58 10 - 3 1 56 - 3 36 50 - 3 23 20 -0.32 169 0 0 - 4 2 54 0 8 8.8 13 123 74 - 4 18 42 - 3 47 4 - 4 30 51 - 3 34 52 - 4 9 37 - 3 56 11 -0.32 170 0 0 - 4 35 3 0 8 9.8 14 123 75 - 4 50 47 - 4 19 17 - 5 2 52 - 4 7 8 - 4 41 44 - 4 28 21 -0.33 171 0 0 - 5 6 31 0 8 10.9 15 123 76 - 5 22 11 - 4 50 49 - 5 34 13 - 4 38 44 - 5 13 11 - 4 59 51 -0.33 172 0 0 - 5 37 19 0 8 12.1 16 123 76 - 5 52 55 - 5 21 41 - 6 4 54 - 5 9 39 - 5 43 57 - 5 30 41 -0.33 173 0 0 - 6 7 26 0 8 13.4 17 123 77 - 6 22 58 - 5 51 53 - 6 34 54 - 5 39 53 - 6 14 2 - 6 0 50 -0.33 174 0 0 - 6 36 52 0 8 14.7 18 123 78 - 6 52 20 - 6 21 23 - 7 4 13 - 6 9 26 - 6 43 27 - 6 30 17 -0.34 175 0 0 - 7 5 37 0 8 16.1 19 122 78 - 7 21 1 - 6 50 11 - 7 32 51 - 6 38 18 - 7 12 10 - 6 59 4 -0.34 176 0 0 - 7 33 40 0 8 17.6 20 122 78 - 7 49 0 - 7 18 18 - 8 0 47 - 7 6 28 - 7 40 11 - 7 27 9 -0.34 177 0 0 - 8 1 2 0 8 19.2 21 122 79 - 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49 0 0 29 1 5 0 14 48.2 2 230 -51 28 43 11 29 19 2 28 29 26 29 32 52 28 53 29 29 8 43 -0.35 - 48 0 0 29 43 48 0 14 48.3 1 231 -52 29 25 55 30 1 44 29 12 12 30 15 32 29 36 12 29 51 25 -0.35 - 47 0 0 .. .. .... .. .. .. .. .. .. 30 8 12 .. .. .. 29 54 30 .. .. .. ... .. .. ... .. .. .... Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: G201920.7-325829 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 19 20.6987 DE: -32 58 29.343 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 19 20.6987 DE: -32 58 29.343 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.400) * V mag [mag]: 9.0 * B mag [mag]: 11.9 * Diameter [mas]: 5.70 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3339) Treshnikov asteroid class: approx. diameter [km]: 34 approx. diameter ["]: 0.014 distance from Earth [AU]: 3.37390 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.020", 0.004", 92.006° remarks: * orbital elements for (3339)Treshnikov : Mean anomaly = 71.0509148622 deg Arg. of pericenter = 147.3943856962 deg Long. of node = 84.7111768446 deg Inclination = 17.8177567955 deg Eccentricity = 0.1324664574 Semimajor axis = 3.1792561823 AU Perihelion dist = 2.7581113788 AU Mag: H = 11.36, G = 0.15 Epoch of elements : MJD 60631.00793800 TDT (2024 Nov 17.0079) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,1.64,2024,11,17,0.190514,-0.099115,0.323974,15.989792,4.875076,0.005345,0.000705,0.000000,0.000000 -114.1843,-32.8992,173.38,-19.05,False G201920.7-325829,20.32241635,-32.9748174,11.87,9.03,7.50,5.7,4,,20.34839661,-32.8992061,8.32,9.41,0,0,0 3339,Treshnikov,17.35,48.426,3.3739,0,0,3.310,12.71,,1.8,0 0,70.8757,2024,11,16,147.3944,84.7112,17.8178,0.13247,3.17926,2.75811,11.36,5.0,0.15 1.385,0.0197,0.0044,92,0.0076,Known errors,1.11,0,-1,-1 20241117_325829,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org