IOTA/IOTA-ES occultation update for (441) Bathilde / UCAC4 325-099036 event on 2023 Apr 05, 05:42 UT Visible from South America Summary ------- On 2023 Apr 05 UT, the 64 km diameter asteroid (441) Bathilde will occult a 12.3 mag star in the constellation Ophiuchus 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 1.74 mag to 13.84 mag (the magnitude of the asteroid) for at most 22.920 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: 2023 Apr 05, 05:03 - 2023 Apr 05, 06:21 * geocentric midpoint of event [JD]: 2460039.73786179 * magnitude of target star: 12.34 * magnitude drop [mag]: 1.74 * estimated maximum duration [s]: 22.920 * Moon: 99 % sunlit, 75° distance * Sun: 117° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 64 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 8.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 86°) * approx speed of asteroid's shadow [km/s]: 2.7924 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 325-099036 by 441 Bathilde on 2023 Apr 5 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 -112 0 0 -20 33 30 5 4 35.4 0 117 -52 -20 52 56 -20 14 3 -20 58 48 -20 8 11 .... -111 0 0 -21 1 51 5 4 36.1 2 116 -52 -21 21 14 -20 42 28 -21 27 5 -20 36 37 0.11 -110 0 0 -21 29 42 5 4 37.7 3 116 -53 -21 49 1 -21 10 22 -21 54 51 -21 4 33 0.07 -109 0 0 -21 57 1 5 4 39.9 4 116 -54 -22 16 17 -21 37 46 -22 22 6 -21 31 57 0.05 -108 0 0 -22 23 49 5 4 42.9 5 115 -55 -22 43 2 -22 4 37 -22 48 49 -21 58 50 0.04 -107 0 0 -22 50 5 5 4 46.7 6 115 -55 -23 9 14 -22 30 57 -23 15 0 -22 25 11 0.04 -106 0 0 -23 15 49 5 4 51.2 7 115 -56 -23 34 54 -22 56 44 -23 40 39 -22 50 59 0.03 -105 0 0 -23 41 0 5 4 56.3 8 114 -57 -24 0 0 -23 21 59 -24 5 44 -23 16 15 0.03 -104 0 0 -24 5 37 5 5 2.2 9 114 -57 -24 24 34 -23 46 40 -24 30 17 -23 40 57 0.02 -103 0 0 -24 29 41 5 5 8.8 10 113 -58 -24 48 34 -24 10 47 -24 54 16 -24 5 5 0.02 -102 0 0 -24 53 10 5 5 16.0 11 113 -58 -25 12 0 -24 34 21 -25 17 41 -24 28 40 0.02 -101 0 0 -25 16 6 5 5 23.9 12 112 -59 -25 34 52 -24 57 20 -25 40 31 -24 51 41 0.01 -100 0 0 -25 38 27 5 5 32.5 13 112 -60 -25 57 10 -25 19 45 -26 2 48 -25 14 7 0.01 - 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1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.014", 0.002", 86.233° remarks: * orbital elements for (441)Bathilde : Mean anomaly = 138.2277744381 deg Arg. of pericenter = 202.8536312646 deg Long. of node = 253.4992846403 deg Inclination = 8.1587098896 deg Eccentricity = 0.0815324722 Semimajor axis = 2.8062933964 AU Perihelion dist = 2.5774893579 AU Mag: H = 8.64, G = 0.15 Epoch of elements : MJD 60039.23784722 TDT (2023 Apr 05.2378) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#682023Feb07,22.92,2023,4,5,5.708683,-0.023210,0.048694,1.421251,0.681344,-0.005103,0.000566,0.000001,0.000000 -21.9715,-25.2133,95.08,5.98,False UCAC4 325-099036,17.10507162,-25.1817326,0.00,12.34,0.00,0.0,0,,17.12884904,-25.2133468,1.75,0.00,0,0,1 441,Bathilde,13.84,64.0,2.3945,0,0,0.384,2.50,,3.4,0 0,138.1779,2023,4,5,202.8536,253.4993,8.1587,0.08153,2.80629,2.57749,8.66,5.0,0.15 1.151,0.0143,0.0017,86,0.0056,Known errors,-1.00,-1,-1,-1 20230405_099036,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org