IOTA/IOTA-ES occultation update for (752) Sulamitis / UCAC4 345-198013 event on 2022 May 21, 06:12 UT Visible from South America Summary ------- On 2022 May 21 UT, the 61.5 km diameter asteroid (752) Sulamitis will occult a 11.7 mag star in the constellation Capricornus for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.47 mag to 15.08 mag (the magnitude of the asteroid) for at most 9.950 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: 2022 May 21, 05:55 - 2022 May 21, 06:29 * geocentric midpoint of event [JD]: 2459720.75866609 * magnitude of target star: 11.66 * magnitude drop [mag]: 3.47 * estimated maximum duration [s]: 9.950 * Moon: 67 % sunlit, 3° distance * Sun: 112° distance * rough path description: South America Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 65 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.006", 56°) * approx speed of asteroid's shadow [km/s]: 6.1826 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 345-198013 by 752 Sulamitis on 2022 May 21 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 -109 0 0 - 8 3 12 5 56 15.6 1 111 -68 - 8 22 23 - 7 44 3 - 8 30 17 - 7 36 12 .... -108 0 0 - 8 26 50 5 56 16.1 2 111 -69 - 8 46 4 - 8 7 39 - 8 53 58 - 7 59 47 0.35 -107 0 0 - 8 50 46 5 56 17.0 3 111 -70 - 9 10 2 - 8 31 32 - 9 17 57 - 8 23 40 0.36 -106 0 0 - 9 14 58 5 56 18.3 4 111 -71 - 9 34 16 - 8 55 43 - 9 42 12 - 8 47 49 0.36 -105 0 0 - 9 39 27 5 56 19.9 5 110 -72 - 9 58 47 - 9 20 9 -10 6 44 - 9 12 15 0.37 -104 0 0 -10 4 11 5 56 22.0 6 110 -73 -10 23 34 - 9 44 52 -10 31 32 - 9 36 56 0.37 -103 0 0 -10 29 11 5 56 24.4 7 110 -74 -10 48 35 -10 9 49 -10 56 34 -10 1 53 0.37 -102 0 0 -10 54 26 5 56 27.3 8 110 -75 -11 13 52 -10 35 2 -11 21 52 -10 27 5 0.37 -101 0 0 -11 19 54 5 56 30.5 9 110 -76 -11 39 23 -11 0 29 -11 47 23 -10 52 31 0.37 -100 0 0 -11 45 36 5 56 34.1 11 109 -77 -12 5 7 -11 26 9 -12 13 8 -11 18 10 0.38 - 99 0 0 -12 11 32 5 56 38.1 12 109 -78 -12 31 4 -11 52 2 -12 39 6 -11 44 3 0.38 - 98 0 0 -12 37 39 5 56 42.5 13 109 -79 -12 57 13 -12 18 8 -13 5 16 -12 10 8 0.38 - 97 0 0 -13 3 58 5 56 47.2 14 109 -80 -13 23 34 -12 44 25 -13 31 37 -12 36 25 0.38 - 96 0 0 -13 30 28 5 56 52.4 15 109 -81 -13 50 6 -13 10 54 -13 58 10 -13 2 52 0.38 - 95 0 0 -13 57 9 5 56 57.9 16 108 -82 -14 16 48 -13 37 33 -14 24 52 -13 29 30 0.38 - 94 0 0 -14 23 59 5 57 3.8 17 108 -83 -14 43 39 -14 4 21 -14 51 45 -13 56 18 0.38 - 93 0 0 -14 50 58 5 57 10.1 18 108 -84 -15 10 39 -14 31 18 -15 18 46 -14 23 15 0.38 - 92 0 0 -15 18 5 5 57 16.8 19 107 -85 -15 37 48 -14 58 24 -15 45 54 -14 50 20 0.38 - 91 0 0 -15 45 19 5 57 23.8 20 107 -85 -16 5 3 -15 25 37 -16 13 11 -15 17 33 0.38 - 90 0 0 -16 12 40 5 57 31.3 21 107 -86 -16 32 26 -15 52 57 -16 40 33 -15 44 52 0.38 - 89 0 0 -16 40 7 5 57 39.0 22 106 -86 -16 59 53 -16 20 22 -17 8 2 -16 12 17 0.38 - 88 0 0 -17 7 38 5 57 47.2 24 106 -86 -17 27 26 -16 47 53 -17 35 35 -16 39 47 0.38 - 87 0 0 -17 35 14 5 57 55.7 25 106 -86 -17 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247 40 -29 46 6 -29 7 12 -29 54 7 -28 59 14 0.50 75 0 0 -29 3 28 6 28 41.3 2 247 40 -29 22 58 -28 44 1 -29 30 59 -28 36 3 0.56 76 0 0 -28 40 6 6 28 41.8 1 246 41 -28 59 37 -28 20 38 -29 7 38 -28 12 39 0.79 Uncertainty in time = +/- 3 secs Prediction of 2022 Mar 27.1 Data for the target star ------------------------ * name: UCAC4 345-198013 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 42 50.2347 DE: -21 05 29.012 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 42 50.2347 DE: -21 05 29.012 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (752) Sulamitis asteroid class: approx. diameter [km]: 62 approx. diameter ["]: 0.041 distance from Earth [AU]: 2.09010 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#93 date of fit: 2021 Oct 07 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): 0.010", 0.006", 56.155° remarks: * orbital elements for (752)Sulamitis : Mean anomaly = 178.4698282936 deg Arg. of pericenter = 23.1190766229 deg Long. of node = 85.1121284990 deg Inclination = 5.9619699742 deg Eccentricity = 0.0746263919 Semimajor axis = 2.4619156444 AU Perihelion dist = 2.2781917626 AU Mag: H = 10.34, G = 0.15 Epoch of elements : MJD 59720.25875000 TDT (2022 May 21.2588) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#932021Oct07,9.95,2022,5,21,6.207986,-0.063392,-0.324101,3.424632,-0.670436,-0.004986,-0.001242,0.000000,0.000000 -20.9610,-21.0112,86.03,20.19,False UCAC4 345-198013,20.71395408,-21.0913922,0.00,11.66,0.00,0.0,0,,20.73538547,-21.0112043,3.46,0.00,0,0,0 752,Sulamitis,15.08,61.5,2.0901,0,0,1.029,-2.82,,3.0 0,178.4038,2022,5,21,23.1191,85.1121,5.9620,0.07463,2.46192,2.27819,10.34,5.0,0.15 1.205,0.0103,0.0057,56,0.0083,Known errors,-1.00,-1,-1,-1 20220521_198013,59665.09 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Mar 27, 02:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org