IOTA/IOTA-ES occultation update for (441) Bathilde / UCAC4-455-050009 event on 2022 Jun 02, 11:48 UT Visible from S Australia Summary ------- On 2022 Jun 02 UT, the 64 km diameter asteroid (441) Bathilde will occult a 12.5 mag star in the constellation Sextans for observers along a path across S Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.76 mag to 13.97 mag (the magnitude of the asteroid) for at most 3.310 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 Jun 02, 11:43 - 2022 Jun 02, 11:53 * geocentric midpoint of event [JD]: 2459732.99202937 * magnitude of target star: 12.45 * magnitude drop [mag]: 1.76 * estimated maximum duration [s]: 3.310 * Moon: 8 % sunlit, 54° distance * Sun: 86° distance * rough path description: S Australia The occultation path -------------------- * approximate projected width [km]: 72 * 1 sigma uncertainty interval [path widths]: +/- 0.12 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.001", 113°) * approx speed of asteroid's shadow [km/s]: 19.3490 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-455-050009 by 441 Bathilde on 2022 Jun 2 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 1 0 0 -17 10 7 11 43 36.6 1 89 51 -17 29 38 -16 50 39 -17 34 23 -16 45 56 .... 2 0 0 -17 9 27 11 43 36.7 2 89 51 -17 28 58 -16 50 0 -17 33 43 -16 45 17 0.36 3 0 0 -17 9 0 11 43 36.9 3 88 51 -17 28 31 -16 49 32 -17 33 16 -16 44 49 0.42 4 0 0 -17 8 44 11 43 37.3 4 88 51 -17 28 15 -16 49 17 -17 33 0 -16 44 33 0.44 5 0 0 -17 8 40 11 43 37.7 5 88 51 -17 28 11 -16 49 13 -17 32 56 -16 44 29 0.46 6 0 0 -17 8 48 11 43 38.3 6 87 51 -17 28 19 -16 49 20 -17 33 4 -16 44 37 0.47 7 0 0 -17 9 7 11 43 38.9 6 87 51 -17 28 39 -16 49 40 -17 33 24 -16 44 57 0.47 8 0 0 -17 9 39 11 43 39.7 7 87 50 -17 29 10 -16 50 11 -17 33 55 -16 45 28 0.48 9 0 0 -17 10 22 11 43 40.5 8 87 50 -17 29 53 -16 50 54 -17 34 38 -16 46 11 0.48 10 0 0 -17 11 17 11 43 41.5 9 86 50 -17 30 48 -16 51 49 -17 35 33 -16 47 6 0.48 11 0 0 -17 12 24 11 43 42.5 10 86 50 -17 31 55 -16 52 56 -17 36 40 -16 48 12 0.49 12 0 0 -17 13 42 11 43 43.7 11 86 50 -17 33 14 -16 54 14 -17 37 59 -16 49 31 0.49 13 0 0 -17 15 13 11 43 44.9 12 85 50 -17 34 44 -16 55 44 -17 39 29 -16 51 1 0.49 14 0 0 -17 16 55 11 43 46.3 13 85 49 -17 36 26 -16 57 26 -17 41 12 -16 52 43 0.49 15 0 0 -17 18 48 11 43 47.8 14 85 49 -17 38 20 -16 59 20 -17 43 6 -16 54 36 0.49 16 0 0 -17 20 54 11 43 49.3 15 84 49 -17 40 26 -17 1 25 -17 45 12 -16 56 42 0.50 17 0 0 -17 23 11 11 43 51.0 16 84 48 -17 42 44 -17 3 42 -17 47 29 -16 58 59 0.50 18 0 0 -17 25 40 11 43 52.8 17 84 48 -17 45 13 -17 6 11 -17 49 58 -17 1 27 0.50 19 0 0 -17 28 21 11 43 54.6 18 83 48 -17 47 54 -17 8 51 -17 52 39 -17 4 8 0.50 20 0 0 -17 31 13 11 43 56.6 19 83 47 -17 50 46 -17 11 43 -17 55 31 -17 6 59 0.50 21 0 0 -17 34 17 11 43 58.7 20 83 47 -17 53 50 -17 14 47 -17 58 35 -17 10 3 0.50 22 0 0 -17 37 32 11 44 0.8 21 82 46 -17 57 5 -17 18 2 -18 1 51 -17 13 18 0.50 23 0 0 -17 40 58 11 44 3.1 22 82 46 -18 0 32 -17 21 28 -18 5 18 -17 16 44 0.50 24 0 0 -17 44 36 11 44 5.4 23 81 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-66 -36 44 13 -36 5 14 -36 48 59 -36 0 30 0.52 160 0 0 -36 28 24 11 53 13.2 14 281 -67 -36 47 55 -36 8 56 -36 52 40 -36 4 13 0.52 161 0 0 -36 31 56 11 53 14.4 13 281 -67 -36 51 28 -36 12 29 -36 56 13 -36 7 45 0.52 162 0 0 -36 35 19 11 53 15.5 12 280 -68 -36 54 50 -36 15 52 -36 59 35 -36 11 9 0.52 163 0 0 -36 38 33 11 53 16.5 11 279 -69 -36 58 4 -36 19 6 -37 2 49 -36 14 22 0.52 164 0 0 -36 41 37 11 53 17.5 10 279 -69 -37 1 7 -36 22 10 -37 5 52 -36 17 27 0.53 165 0 0 -36 44 31 11 53 18.4 10 278 -70 -37 4 1 -36 25 4 -37 8 46 -36 20 21 0.53 166 0 0 -36 47 16 11 53 19.2 9 278 -70 -37 6 46 -36 27 49 -37 11 30 -36 23 6 0.53 167 0 0 -36 49 50 11 53 20.0 8 277 -71 -37 9 20 -36 30 24 -37 14 5 -36 25 41 0.53 168 0 0 -36 52 16 11 53 20.7 7 276 -71 -37 11 45 -36 32 49 -37 16 30 -36 28 6 0.53 169 0 0 -36 54 31 11 53 21.3 6 276 -72 -37 14 1 -36 35 5 -37 18 45 -36 30 22 0.54 170 0 0 -36 56 37 11 53 21.8 6 275 -72 -37 16 6 -36 37 11 -37 20 51 -36 32 28 0.54 171 0 0 -36 58 33 11 53 22.3 5 275 -73 -37 18 2 -36 39 7 -37 22 47 -36 34 24 0.55 172 0 0 -37 0 19 11 53 22.7 4 274 -73 -37 19 48 -36 40 53 -37 24 33 -36 36 11 0.56 173 0 0 -37 1 56 11 53 23.0 3 273 -74 -37 21 25 -36 42 30 -37 26 9 -36 37 47 0.57 174 0 0 -37 3 23 11 53 23.2 2 273 -74 -37 22 52 -36 43 57 -37 27 36 -36 39 14 0.59 175 0 0 -37 4 40 11 53 23.4 1 272 -74 -37 24 9 -36 45 14 -37 28 53 -36 40 31 0.64 176 0 0 -37 5 47 11 53 23.5 1 272 -74 -37 25 16 -36 46 22 -37 30 0 -36 41 39 0.79 Uncertainty in time = +/- 2 secs Prediction of 2022 Apr 15.8 Data for the target star ------------------------ * name: UCAC4-455-050009 * constellation : Sextans * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 26 03.7724 DE: +00 58 02.659 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 26 03.7724 DE: +00 58 02.659 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (441) Bathilde asteroid class: approx. diameter [km]: 64 approx. diameter ["]: 0.034 distance from Earth [AU]: 2.63390 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#63 date of fit: 2022 Apr 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): 0.018", 0.001", 112.536° remarks: * orbital elements for (441)Bathilde : Mean anomaly = 73.8726375802 deg Arg. of pericenter = 202.9181086978 deg Long. of node = 253.5104734409 deg Inclination = 8.1570773404 deg Eccentricity = 0.0812853721 Semimajor axis = 2.8067657451 AU Perihelion dist = 2.5786167471 AU Mag: H = 8.65, G = 0.15 Epoch of elements : MJD 59732.49194444 TDT (2022 Jun 02.4919) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#632022Apr11,3.31,2022,6,2,11.808705,-0.074741,-0.447479,10.757987,-1.880531,0.005164,-0.002114,0.000000,0.000000 88.7392,0.8542,2.38,22.22,False UCAC4-455-050009,10.43438124,0.9674053,0.00,12.45,0.00,0.0,0,K,10.45330767,0.8541686,1.76,0.00,0,0,0 441,Bathilde,13.97,64.0,2.6339,0,0,2.395,-6.28,,3.4 0,73.7695,2022,6,2,202.9181,253.5105,8.1571,0.08129,2.80677,2.57862,8.61,5.0,0.15 1.122,0.0180,0.0011,113,0.0041,Known errors,-1.00,-1,-1,-1 20220602_050009,59684.83 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Apr 15, 19:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org