IOTA/IOTA-ES occultation update for (7924) Simbirsk / TYC 6320-02162-1 event on 2024 Mar 11, 08:49 UT Visible from Summary ------- On 2024 Mar 11 UT, the 13.108 km diameter asteroid (7924) Simbirsk will occult a 10.4 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 8.19 mag to 18.56 mag (the magnitude of the asteroid) for at most 0.360 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: 98 * date and approx. time of event: 2024 Mar 11, 08:46 - 2024 Mar 11, 08:52 * geocentric midpoint of event [JD]: 2460380.86741338 * magnitude of target star: 10.37 * magnitude drop [mag]: 8.19 * estimated maximum duration [s]: 0.360 * Moon: 2 % sunlit, 71° distance * Sun: 56° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.002", 81°) * approx speed of asteroid's shadow [km/s]: 35.9309 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6320-02162-1 by 7924 Simbirsk on 2024 Mar 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 -102 0 0 -20 39 19 8 46 10.4 0 111 -54 -20 43 12 -20 35 25 -20 46 3 -20 32 35 .... -101 0 0 -21 1 30 8 46 10.4 1 111 -53 -21 5 24 -20 57 37 -21 8 14 -20 54 47 0.22 -100 0 0 -21 23 28 8 46 10.5 2 111 -52 -21 27 21 -21 19 35 -21 30 11 -21 16 45 0.21 - 99 0 0 -21 45 11 8 46 10.7 3 110 -51 -21 49 4 -21 41 18 -21 51 53 -21 38 28 0.21 - 98 0 0 -22 6 39 8 46 10.9 4 110 -50 -22 10 32 -22 2 46 -22 13 21 -21 59 57 0.21 - 97 0 0 -22 27 52 8 46 11.2 5 110 -49 -22 31 45 -22 24 0 -22 34 34 -22 21 11 0.20 - 96 0 0 -22 48 50 8 46 11.5 6 109 -48 -22 52 42 -22 44 58 -22 55 31 -22 42 9 0.20 - 95 0 0 -23 9 31 8 46 11.9 7 109 -47 -23 13 23 -23 5 40 -23 16 12 -23 2 51 0.20 - 94 0 0 -23 29 57 8 46 12.3 8 108 -47 -23 33 48 -23 26 6 -23 36 37 -23 23 17 0.20 - 93 0 0 -23 50 6 8 46 12.8 9 108 -46 -23 53 57 -23 46 15 -23 56 45 -23 43 26 0.20 - 92 0 0 -24 9 58 8 46 13.3 10 108 -45 -24 13 49 -24 6 7 -24 16 37 -24 3 19 0.20 - 91 0 0 -24 29 33 8 46 13.8 11 107 -44 -24 33 23 -24 25 43 -24 36 11 -24 22 55 0.20 - 90 0 0 -24 48 51 8 46 14.5 12 107 -43 -24 52 41 -24 45 0 -24 55 28 -24 42 13 0.20 - 89 0 0 -25 7 51 8 46 15.1 13 106 -42 -25 11 40 -25 4 1 -25 14 28 -25 1 13 0.20 - 88 0 0 -25 26 33 8 46 15.8 14 106 -41 -25 30 22 -25 22 43 -25 33 9 -25 19 56 0.20 - 87 0 0 -25 44 56 8 46 16.6 15 105 -40 -25 48 46 -25 41 7 -25 51 33 -25 38 20 0.20 - 86 0 0 -26 3 2 8 46 17.4 16 105 -39 -26 6 51 -25 59 13 -26 9 37 -25 56 26 0.20 - 85 0 0 -26 20 49 8 46 18.3 17 105 -38 -26 24 37 -26 17 0 -26 27 24 -26 14 14 0.20 - 84 0 0 -26 38 17 8 46 19.2 18 104 -37 -26 42 5 -26 34 29 -26 44 51 -26 31 43 0.20 - 83 0 0 -26 55 26 8 46 20.1 19 104 -36 -26 59 14 -26 51 38 -27 2 0 -26 48 52 0.20 - 82 0 0 -27 12 16 8 46 21.1 20 103 -35 -27 16 3 -27 8 29 -27 18 49 -27 5 43 0.20 - 81 0 0 -27 28 46 8 46 22.1 21 103 -34 -27 32 34 -27 24 59 -27 35 19 -27 22 14 0.20 - 80 0 0 -27 44 58 8 46 23.1 22 102 -33 -27 48 44 -27 41 11 -27 51 30 -27 38 26 0.20 - 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4 50 46 - 5 1 28 - 4 47 55 0.22 73 0 0 - 4 30 9 8 51 54.9 12 250 67 - 4 34 4 - 4 26 14 - 4 36 55 - 4 23 23 0.22 74 0 0 - 4 5 46 8 51 55.6 11 250 66 - 4 9 40 - 4 1 51 - 4 12 31 - 3 59 0 0.22 75 0 0 - 3 41 32 8 51 56.2 10 250 65 - 3 45 27 - 3 37 38 - 3 48 18 - 3 34 47 0.22 76 0 0 - 3 17 29 8 51 56.7 9 250 64 - 3 21 23 - 3 13 35 - 3 24 14 - 3 10 45 0.23 77 0 0 - 2 53 37 8 51 57.2 8 250 63 - 2 57 31 - 2 49 43 - 3 0 21 - 2 46 53 0.23 78 0 0 - 2 29 56 8 51 57.6 7 250 62 - 2 33 50 - 2 26 3 - 2 36 40 - 2 23 13 0.24 79 0 0 - 2 6 28 8 51 58.0 6 250 60 - 2 10 21 - 2 2 34 - 2 13 11 - 1 59 45 0.24 80 0 0 - 1 43 12 8 51 58.3 4 250 59 - 1 47 5 - 1 39 19 - 1 49 54 - 1 36 29 0.25 81 0 0 - 1 20 8 8 51 58.5 3 250 58 - 1 24 1 - 1 16 16 - 1 26 51 - 1 13 26 0.27 82 0 0 - 0 57 19 8 51 58.7 2 250 57 - 1 1 11 - 0 53 26 - 1 4 1 - 0 50 37 0.30 83 0 0 - 0 34 43 8 51 58.8 1 250 56 - 0 38 35 - 0 30 51 - 0 41 24 - 0 28 2 0.39 84 0 0 - 0 12 22 8 51 58.8 0 250 55 - 0 16 14 - 0 8 30 - 0 19 3 - 0 5 41 1.69 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: TYC 6320-02162-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 44 59.2768 DE: -20 13 48.805 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 44 59.2770 DE: -20 13 48.804 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.4 * B mag [mag]: 10.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7924) Simbirsk asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.07130 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 date of fit: 2023 Apr 25 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", 0.002", 81° remarks: * orbital elements for (7924)Simbirsk : Mean anomaly = 338.8531978609 deg Arg. of pericenter = 114.6187243734 deg Long. of node = 190.9589379434 deg Inclination = 1.1636586045 deg Eccentricity = 0.1598919592 Semimajor axis = 3.1038932186 AU Perihelion dist = 2.6076056507 AU Mag: H = 13.07, G = 0.15 Epoch of elements : MJD 60380.36741312 TDT (2024 Mar 11.3674) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr25,0.36,2024,3,11,8.817921,0.035485,-0.187211,19.919582,3.808520,-0.004788,-0.000809,-0.000001,0.000000 -5.1807,-20.1735,50.21,-3.46,False TYC 6320-02162-1,19.74979906,-20.2302237,10.74,10.37,10.17,0.0,0,,19.77313778,-20.1735035,8.19,7.94,0,0,0 7924,Simbirsk,18.56,13.108,3.0713,0,0,4.051,10.91,,1.4,0 0,338.7870,2024,3,11,114.6187,190.9589,1.1637,0.15989,3.10389,2.60761,13.06,5.0,0.15 1.364,0.0203,0.0021,81,0.0022,Known errors,0.89,0,-1,-1 20240311_2162-1,60139.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org