IOTA/IOTA-ES occultation update for (6712) Hornstein / UCAC4 336-130074 event on 2024 Oct 14, 01:27 UT Visible from Summary ------- On 2024 Oct 14 UT, the 9.11948792720967 km diameter asteroid (6712) Hornstein will occult a 11.3 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 7.74 mag to 19.03 mag (the magnitude of the asteroid) for at most 0.320 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: 2024 Oct 14, 01:23 - 2024 Oct 14, 01:30 * geocentric midpoint of event [JD]: 2460597.56042546 * magnitude of target star: 11.29 * magnitude drop [mag]: 7.74 * estimated maximum duration [s]: 0.320 * Moon: 83 % sunlit, 59° distance * Sun: 72° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 10 * 1 sigma uncertainty interval [path widths]: +/- 0.28 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 87°) * approx speed of asteroid's shadow [km/s]: 28.7607 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 336-130074 by 6712 Hornstein on 2024 Oct 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 145 0 0 10 34 17 1 23 25.1 1 113 68 10 31 28 10 37 6 10 29 53 10 38 41 .... 146 0 0 10 8 46 1 23 25.2 2 114 69 10 5 57 10 11 35 10 4 22 10 13 10 -0.06 147 0 0 9 43 19 1 23 25.4 3 114 70 9 40 30 9 46 8 9 38 55 9 47 43 -0.13 148 0 0 9 17 55 1 23 25.6 4 114 71 9 15 7 9 20 44 9 13 31 9 22 19 -0.16 149 0 0 8 52 36 1 23 25.9 5 114 72 8 49 48 8 55 25 8 48 13 8 57 0 -0.18 150 0 0 8 27 23 1 23 26.3 6 114 72 8 24 34 8 30 11 8 22 59 8 31 46 -0.19 151 0 0 8 2 15 1 23 26.8 7 114 73 7 59 27 8 5 4 7 57 52 8 6 39 -0.19 152 0 0 7 37 14 1 23 27.3 8 114 74 7 34 26 7 40 2 7 32 51 7 41 37 -0.20 153 0 0 7 12 20 1 23 28.0 9 115 74 7 9 32 7 15 8 7 7 57 7 16 43 -0.20 154 0 0 6 47 34 1 23 28.7 10 115 75 6 44 46 6 50 22 6 43 12 6 51 57 -0.21 155 0 0 6 22 57 1 23 29.5 11 115 75 6 20 9 6 25 44 6 18 34 6 27 19 -0.21 156 0 0 5 58 28 1 23 30.4 12 115 76 5 55 41 6 1 16 5 54 6 6 2 50 -0.21 157 0 0 5 34 9 1 23 31.3 13 115 76 5 31 22 5 36 57 5 29 47 5 38 31 -0.21 158 0 0 5 10 1 1 23 32.3 14 115 76 5 7 13 5 12 48 5 5 39 5 14 22 -0.21 159 0 0 4 46 3 1 23 33.4 16 115 77 4 43 16 4 48 50 4 41 42 4 50 24 -0.22 160 0 0 4 22 16 1 23 34.6 17 115 77 4 19 30 4 25 3 4 17 55 4 26 37 -0.22 161 0 0 3 58 42 1 23 35.9 18 116 77 3 55 55 4 1 29 3 54 21 4 3 3 -0.22 162 0 0 3 35 20 1 23 37.2 19 116 77 3 32 34 3 38 6 3 31 0 3 39 40 -0.22 163 0 0 3 12 11 1 23 38.6 20 116 76 3 9 25 3 14 57 3 7 51 3 16 31 -0.22 164 0 0 2 49 16 1 23 40.1 21 116 76 2 46 30 2 52 2 2 44 56 2 53 36 -0.22 165 0 0 2 26 35 1 23 41.7 22 116 76 2 23 49 2 29 21 2 22 16 2 30 54 -0.22 166 0 0 2 4 8 1 23 43.3 23 116 75 2 1 23 2 6 54 1 59 49 2 8 27 -0.22 167 0 0 1 41 57 1 23 45.0 24 116 75 1 39 12 1 44 42 1 37 38 1 46 16 -0.22 168 0 0 1 20 1 1 23 46.8 25 116 74 1 17 16 1 22 46 1 15 43 1 24 19 -0.22 169 0 0 0 58 21 1 23 48.6 26 116 74 0 55 37 1 1 6 0 54 4 1 2 39 -0.22 170 0 0 0 36 58 1 23 50.6 27 116 73 0 34 14 0 39 43 0 32 41 0 41 16 -0.22 171 0 0 0 15 52 1 23 52.5 28 116 72 0 13 8 0 18 36 0 11 35 0 20 9 -0.23 172 0 0 - 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64 0 0 7 10 20 1 30 26.2 17 243 -52 7 7 32 7 13 9 7 5 57 7 14 43 -0.23 - 63 0 0 7 35 17 1 30 27.5 16 243 -53 7 32 29 7 38 6 7 30 54 7 39 41 -0.23 - 62 0 0 8 0 22 1 30 28.6 15 244 -54 7 57 33 8 3 10 7 55 58 8 4 45 -0.23 - 61 0 0 8 25 33 1 30 29.7 14 244 -55 8 22 44 8 28 21 8 21 9 8 29 56 -0.23 - 60 0 0 8 50 50 1 30 30.7 13 244 -57 8 48 1 8 53 38 8 46 26 8 55 13 -0.23 - 59 0 0 9 16 12 1 30 31.6 12 244 -58 9 13 23 9 19 1 9 11 48 9 20 36 -0.23 - 58 0 0 9 41 39 1 30 32.5 11 244 -58 9 38 50 9 44 28 9 37 15 9 46 3 -0.23 - 57 0 0 10 7 10 1 30 33.2 10 244 -59 10 4 21 10 9 59 10 2 46 10 11 34 -0.23 - 56 0 0 10 32 45 1 30 33.9 9 245 -60 10 29 56 10 35 34 10 28 20 10 37 9 -0.23 - 55 0 0 10 58 22 1 30 34.5 8 245 -61 10 55 33 11 1 11 10 53 57 11 2 46 -0.23 - 54 0 0 11 24 1 1 30 35.0 7 245 -62 11 21 12 11 26 50 11 19 37 11 28 26 -0.23 - 53 0 0 11 49 42 1 30 35.5 5 245 -63 11 46 53 11 52 31 11 45 17 11 54 7 -0.23 - 52 0 0 12 15 24 1 30 35.9 4 245 -64 12 12 34 12 18 13 12 10 59 12 19 49 -0.23 - 51 0 0 12 41 5 1 30 36.1 3 246 -65 12 38 16 12 43 55 12 36 41 12 45 30 -0.23 - 50 0 0 13 6 47 1 30 36.3 2 246 -66 13 3 57 13 9 36 13 2 22 13 11 12 -0.22 - 49 0 0 13 32 27 1 30 36.5 1 246 -67 13 29 37 13 35 16 13 28 2 13 36 52 -0.21 - 48 0 0 13 58 5 1 30 36.5 0 246 -68 13 55 15 14 0 54 13 53 40 14 2 30 -0.09 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 336-130074 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 14 06.9306 DE: -22 52 42.336 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 14 06.9306 DE: -22 52 42.336 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * B mag [mag]: 12.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6712) Hornstein asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.005 distance from Earth [AU]: 2.36480 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 date of fit: 2023 Apr 27 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): 0.015", 0.001", 87.277° remarks: * orbital elements for (6712)Hornstein : Mean anomaly = 58.4455164739 deg Arg. of pericenter = 322.4616223096 deg Long. of node = 263.9538369311 deg Inclination = 0.9683277325 deg Eccentricity = 0.1247284926 Semimajor axis = 2.3984206681 AU Perihelion dist = 2.0992692736 AU Mag: H = 14.23, G = 0.15 Epoch of elements : MJD 60597.06042550 TDT (2024 Oct 14.0604) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr27,0.32,2024,10,14,1.450211,-0.007452,0.231449,16.225636,0.499777,0.005249,0.000159,-0.000001,0.000000 -130.9436,-22.8722,154.75,-8.27,False UCAC4 336-130074,18.23525855,-22.8784267,11.97,11.29,10.92,0.1,0,,18.26012379,-22.8721502,7.74,7.65,0,0,0 6712,Hornstein,19.03,9.291,2.3648,0,0,4.366,1.86,,0.8,0 0,58.1641,2024,10,13,322.4616,263.9538,0.9683,0.12473,2.39842,2.09927,14.23,5.0,0.15 1.282,0.0150,0.0015,87,0.0015,Known errors,0.72,0,-1,-1 20241014_130074,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org