IOTA/IOTA-ES occultation update for (69) Hesperia / TYC 6282-00519-1 event on 2022 Oct 29, 10:46 UT Visible from N Australia Summary ------- On 2022 Oct 29 UT, the 134.8 km diameter asteroid (69) Hesperia will occult a 11.3 mag star in the constellation Scutum for observers along a path across N Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.50 mag to 13.72 mag (the magnitude of the asteroid) for at most 5.220 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 Oct 29, 10:42 - 2022 Oct 29, 10:50 * geocentric midpoint of event [JD]: 2459881.94910075 * magnitude of target star: 11.33 * magnitude drop [mag]: 2.50 * estimated maximum duration [s]: 5.220 * Moon: 20 % sunlit, 19° distance * Sun: 68° distance * rough path description: N Australia The occultation path -------------------- * approximate projected width [km]: 135 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.013", 88°) * approx speed of asteroid's shadow [km/s]: 25.8156 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6282-00519-1 by 69 Hesperia on 2022 Oct 29 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 - 3 0 0 0 5 58 10 42 34.8 1 105 67 - 0 32 3 0 43 56 - 0 51 21 1 3 13 .... - 2 0 0 - 0 10 45 10 42 34.9 2 105 68 - 0 48 46 0 27 14 - 1 8 5 0 46 32 0.09 - 1 0 0 - 0 27 31 10 42 35.1 3 105 69 - 1 5 32 0 10 29 - 1 24 51 0 29 47 0.08 0 0 0 - 0 44 20 10 42 35.3 4 105 70 - 1 22 22 - 0 6 19 - 1 41 41 0 12 58 0.07 1 0 0 - 1 1 12 10 42 35.7 5 105 71 - 1 39 14 - 0 23 11 - 1 58 33 - 0 3 53 0.07 2 0 0 - 1 18 5 10 42 36.1 6 105 72 - 1 56 8 - 0 40 4 - 2 15 28 - 0 20 46 0.06 3 0 0 - 1 35 1 10 42 36.6 7 105 73 - 2 13 4 - 0 57 0 - 2 32 24 - 0 37 42 0.06 4 0 0 - 1 51 59 10 42 37.2 8 105 74 - 2 30 2 - 1 13 57 - 2 49 22 - 0 54 39 0.06 5 0 0 - 2 8 58 10 42 37.9 9 105 75 - 2 47 1 - 1 30 56 - 3 6 21 - 1 11 37 0.06 6 0 0 - 2 25 58 10 42 38.6 10 105 76 - 3 4 1 - 1 47 56 - 3 23 21 - 1 28 37 0.06 7 0 0 - 2 42 58 10 42 39.4 11 105 76 - 3 21 1 - 2 4 56 - 3 40 22 - 1 45 37 0.06 8 0 0 - 2 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256 -56 - 8 25 50 - 7 10 3 - 8 45 6 - 6 50 49 0.06 168 0 0 - 7 31 56 10 50 46.0 8 255 -57 - 8 9 51 - 6 54 2 - 8 29 7 - 6 34 48 0.07 169 0 0 - 7 15 50 10 50 46.6 7 255 -58 - 7 53 46 - 6 37 55 - 8 13 2 - 6 18 40 0.07 170 0 0 - 6 59 38 10 50 47.1 6 255 -59 - 7 37 35 - 6 21 43 - 7 56 52 - 6 2 27 0.07 171 0 0 - 6 43 21 10 50 47.5 5 255 -60 - 7 21 19 - 6 5 25 - 7 40 36 - 5 46 9 0.08 172 0 0 - 6 27 0 10 50 47.8 4 255 -61 - 7 4 58 - 5 49 3 - 7 24 16 - 5 29 47 0.08 173 0 0 - 6 10 33 10 50 48.1 3 255 -62 - 6 48 32 - 5 32 36 - 7 7 50 - 5 13 19 0.10 174 0 0 - 5 54 3 10 50 48.3 2 255 -63 - 6 32 3 - 5 16 5 - 6 51 21 - 4 56 48 0.12 175 0 0 - 5 37 29 10 50 48.4 1 255 -64 - 6 15 29 - 4 59 30 - 6 34 47 - 4 40 13 0.23 Uncertainty in time = +/- 2 secs Prediction of 2022 Oct 17.0 Data for the target star ------------------------ * name: TYC 6282-00519-1 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 57 16.5063 DE: -15 25 38.623 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 57 16.5062 DE: -15 25 38.623 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (69) Hesperia asteroid class: approx. diameter [km]: 135 approx. diameter ["]: 0.050 distance from Earth [AU]: 3.71810 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#138 date of fit: 2022 Sep 21 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): 0.016", 0.013", 87.787° remarks: * orbital elements for (69)Hesperia : Mean anomaly = 187.4671042117 deg Arg. of pericenter = 288.8347578959 deg Long. of node = 184.9866974515 deg Inclination = 8.5930524972 deg Eccentricity = 0.1701413108 Semimajor axis = 2.9748264157 AU Perihelion dist = 2.4686855500 AU Mag: H = 7.30, G = 0.19 Epoch of elements : MJD 59881.44916667 TDT (2022 Oct 29.4492) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1382022Sep21,5.22,2022,10,29,10.778418,0.000461,-0.046389,14.551758,-0.749569,0.005490,0.000850,-0.000001,0.000000 85.2137,-15.3973,14.26,-13.52,False TYC 6282-00519-1,18.95458508,-15.4273953,0.00,11.33,0.00,0.0,0,,18.97594617,-15.3973415,2.50,0.00,0,0,0 69,Hesperia,13.72,134.8,3.7181,0,0,2.380,-1.77,,8.4,0 0,187.3808,2022,10,29,288.8348,184.9867,8.5931,0.17014,2.97483,2.46869,7.31,5.0,0.15 1.254,0.0157,0.0127,88,0.0127,Known errors,-1.00,-1,-1,-1 20221029_0519-1,59868.96 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 16, 23:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org