IOTA/IOTA-ES occultation update for (7065) Fredschaaf / TYC 5764-00825-1 event on 2024 Dec 14, 09:52 UT Visible from Summary ------- On 2024 Dec 14 UT, the 16.277 km diameter asteroid (7065) Fredschaaf will occult a 11.1 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.54 mag to 18.59 mag (the magnitude of the asteroid) for at most 0.430 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: 100 * date and approx. time of event: 2024 Dec 14, 09:49 - 2024 Dec 14, 09:54 * geocentric midpoint of event [JD]: 2460658.91124888 * magnitude of target star: 11.05 * magnitude drop [mag]: 7.54 * estimated maximum duration [s]: 0.430 * Moon: 99 % sunlit, 118° distance * Sun: 48° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 78°) * approx speed of asteroid's shadow [km/s]: 37.9354 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5764-00825-1 by 7065 Fredschaaf on 2024 Dec 14 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 - 14 0 0 -24 31 35 9 49 28.8 1 104 49 -24 36 16 -24 26 55 -24 37 5 -24 26 6 .... - 13 0 0 -24 44 59 9 49 28.8 2 103 50 -24 49 39 -24 40 18 -24 50 28 -24 39 30 0.23 - 12 0 0 -24 58 9 9 49 29.0 3 103 51 -25 2 50 -24 53 29 -25 3 38 -24 52 41 0.24 - 11 0 0 -25 11 7 9 49 29.1 4 102 51 -25 15 48 -25 6 27 -25 16 36 -25 5 39 0.24 - 10 0 0 -25 23 52 9 49 29.3 4 102 52 -25 28 32 -25 19 12 -25 29 21 -25 18 24 0.24 - 9 0 0 -25 36 24 9 49 29.6 5 101 53 -25 41 4 -25 31 45 -25 41 52 -25 30 57 0.24 - 8 0 0 -25 48 43 9 49 29.8 6 101 54 -25 53 23 -25 44 4 -25 54 11 -25 43 15 0.24 - 7 0 0 -26 0 48 9 49 30.2 7 101 55 -26 5 28 -25 56 9 -26 6 16 -25 55 21 0.24 - 6 0 0 -26 12 40 9 49 30.5 8 100 56 -26 17 19 -26 8 1 -26 18 7 -26 7 13 0.24 - 5 0 0 -26 24 18 9 49 31.0 9 100 57 -26 28 57 -26 19 39 -26 29 45 -26 18 51 0.25 - 4 0 0 -26 35 42 9 49 31.4 10 99 58 -26 40 20 -26 31 3 -26 41 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Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5764-00825-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 46 24.6590 DE: -12 47 07.356 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 46 24.6588 DE: -12 47 07.357 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.1 * B mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7065) Fredschaaf asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.26940 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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): 0.011", 0.001", 78.157° remarks: * orbital elements for (7065)Fredschaaf : Mean anomaly = 311.4183525570 deg Arg. of pericenter = 178.5951122603 deg Long. of node = 199.1623805465 deg Inclination = 7.5272849962 deg Eccentricity = 0.0356111664 Semimajor axis = 2.7773754193 AU Perihelion dist = 2.6784698411 AU Mag: H = 12.99, G = 0.15 Epoch of elements : MJD 60658.41124859 TDT (2024 Dec 14.4112) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr25,0.43,2024,12,14,9.869973,0.045549,-0.234982,21.018990,4.082579,0.004118,0.001494,-0.000001,0.000000 80.3294,-12.6954,30.66,-23.25,False TYC 5764-00825-1,20.77351644,-12.7853765,11.37,11.05,10.88,0.0,4,,20.79612954,-12.6953526,7.54,7.26,0,0,0 7065,Fredschaaf,18.59,16.277,3.2694,0,0,3.864,10.99,,1.4,0 0,311.3308,2024,12,14,178.5951,199.1624,7.5273,0.03561,2.77738,2.67847,12.99,5.0,0.15 1.086,0.0113,0.0006,78,0.0006,Known errors,0.94,0,-1,-1 20241214_0825-1,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org