IOTA/IOTA-ES occultation update for (882) Swetlana / TYC 828-00565-1 event on 2024 Oct 20, 14:31 UT Visible from Summary ------- On 2024 Oct 20 UT, the 44.202 km diameter asteroid (882) Swetlana will occult a 10.6 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.28 mag to 16.90 mag (the magnitude of the asteroid) for at most 1.540 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 Oct 20, 14:27 - 2024 Oct 20, 14:35 * geocentric midpoint of event [JD]: 2460604.10505929 * magnitude of target star: 10.62 * magnitude drop [mag]: 6.28 * estimated maximum duration [s]: 1.540 * Moon: 86 % sunlit, 77° distance * Sun: 60° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.004", 114°) * approx speed of asteroid's shadow [km/s]: 28.7548 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 828-00565-1 by 882 Swetlana on 2024 Oct 20 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 170 0 0 17 26 42 14 27 37.9 1 82 -59 17 14 29 17 38 54 17 9 14 17 44 9 .... 171 0 0 17 34 42 14 27 38.0 2 82 -58 17 22 30 17 46 54 17 17 16 17 52 8 0.07 172 0 0 17 42 16 14 27 38.1 3 82 -58 17 30 4 17 54 27 17 24 50 17 59 40 0.10 173 0 0 17 49 22 14 27 38.3 4 83 -57 17 37 11 18 1 33 17 31 58 18 6 46 0.11 174 0 0 17 56 2 14 27 38.6 5 83 -56 17 43 52 18 8 12 17 38 38 18 13 25 0.11 175 0 0 18 2 15 14 27 38.9 6 83 -55 17 50 5 18 14 24 17 44 52 18 19 37 0.12 176 0 0 18 8 0 14 27 39.3 7 84 -54 17 55 51 18 20 9 17 50 39 18 25 22 0.12 177 0 0 18 13 19 14 27 39.8 7 84 -53 18 1 11 18 25 27 17 55 58 18 30 40 0.12 178 0 0 18 18 11 14 27 40.3 8 84 -52 18 6 3 18 30 19 18 0 51 18 35 31 0.13 179 0 0 18 22 36 14 27 40.9 9 85 -51 18 10 29 18 34 43 18 5 16 18 39 55 0.13 -180 0 0 18 26 34 14 27 41.5 10 85 -50 18 14 27 18 38 41 18 9 15 18 43 52 0.13 -179 0 0 18 30 5 14 27 42.2 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5 57 -32 41 27 -33 11 13 -32 36 11 0.13 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 828-00565-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 51 26.0945 DE: +08 12 11.281 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 51 26.0949 DE: +08 12 11.279 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.6 * B mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (882) Swetlana asteroid class: approx. diameter [km]: 44 approx. diameter ["]: 0.017 distance from Earth [AU]: 3.55060 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2023 Feb 11 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): 0.015", 0.004", 113.709° remarks: * orbital elements for (882)Swetlana : Mean anomaly = 78.4372576570 deg Arg. of pericenter = 126.1626432311 deg Long. of node = 256.2421498692 deg Inclination = 6.1325386510 deg Eccentricity = 0.2679294533 Semimajor axis = 3.1215767886 AU Perihelion dist = 2.2852144263 AU Mag: H = 10.78, G = 0.15 Epoch of elements : MJD 60603.60505909 TDT (2024 Oct 20.6051) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Feb11,1.54,2024,10,20,14.521423,-0.060253,-0.123266,14.674308,-6.933890,-0.004852,0.001500,-0.000001,0.000000 -99.1802,8.0890,-41.65,-10.65,False TYC 828-00565-1,9.85724843,8.2031337,10.94,10.62,10.45,0.0,0,,9.87893552,8.0889501,6.29,6.01,0,0,0 882,Swetlana,16.90,44.202,3.5506,0,0,2.448,-17.18,,2.2,0 0,78.3291,2024,10,20,126.1626,256.2421,6.1325,0.26793,3.12158,2.28521,10.78,5.0,0.15 1.215,0.0153,0.0037,114,0.0037,Known errors,0.98,0,-1,-1 20241020_0565-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org