IOTA/IOTA-ES occultation update for (595) Polyxena / HIP 11762 event on 2023 Oct 19, 20:46 UT Visible from Russia, N Europe Summary ------- On 2023 Oct 19 UT, the 104.3 km diameter asteroid (595) Polyxena will occult a 7.1 mag star in the constellation Aries for observers along a path across Russia, N Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.65 mag to 12.71 mag (the magnitude of the asteroid) for at most 7.320 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: 2023 Oct 19, 20:40 - 2023 Oct 19, 20:51 * geocentric midpoint of event [JD]: 2460237.36550771 * magnitude of target star: 7.07 * magnitude drop [mag]: 5.65 * estimated maximum duration [s]: 7.320 * Moon: 25 % sunlit, 137° distance * Sun: 162° distance * rough path description: Russia, N Europe The occultation path -------------------- * approximate projected width [km]: 145 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.001", 54°) * approx speed of asteroid's shadow [km/s]: 14.2507 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 11762 by 595 Polyxena on 2023 Oct 19 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 0 0 0 .. .. .... .. .. .. .. .. .. 45 26 14 .. .. .. 45 47 2 .. .. .. .... - 55 0 0 45 6 1 20 51 40.1 0 59 -1 45 51 59 44 20 44 46 12 49 .. .. .. .... - 54 0 0 45 31 38 20 51 40.0 1 60 -2 46 17 38 44 46 19 46 38 29 44 26 13 -0.82 - 53 0 0 45 57 7 20 51 39.7 2 61 -3 46 43 9 45 11 46 47 4 2 44 51 39 -0.88 - 52 0 0 46 22 29 20 51 39.3 3 62 -4 47 8 33 45 37 6 47 29 26 45 16 58 -0.90 - 51 0 0 46 47 41 20 51 38.8 4 62 -4 47 33 47 46 2 17 47 54 41 45 42 9 -0.91 - 50 0 0 47 12 45 20 51 38.1 5 63 -5 47 58 52 46 27 20 48 19 46 46 7 11 -0.92 - 49 0 0 47 37 39 20 51 37.4 5 64 -6 48 23 47 46 52 13 48 44 42 46 32 4 -0.93 - 48 0 0 48 2 22 20 51 36.5 6 65 -7 48 48 31 47 16 56 49 9 26 46 56 46 -0.93 - 47 0 0 48 26 55 20 51 35.5 7 65 -7 49 13 3 47 41 27 49 33 59 47 21 18 -0.93 - 46 0 0 48 51 15 20 51 34.5 8 66 -8 49 37 24 48 5 48 49 58 19 47 45 39 -0.94 - 45 0 0 49 15 23 20 51 33.3 8 67 -9 50 1 32 48 29 57 50 22 27 48 9 47 -0.94 - 44 0 0 49 39 19 20 51 32.0 9 68 -9 50 25 27 48 53 53 50 46 22 48 33 44 -0.94 - 43 0 0 50 3 1 20 51 30.6 10 68 -10 50 49 8 49 17 36 51 10 3 48 57 27 -0.94 - 42 0 0 50 26 30 20 51 29.1 11 69 -11 51 12 35 49 41 5 51 33 29 49 20 57 -0.95 - 41 0 0 50 49 44 20 51 27.6 11 70 -11 51 35 48 50 4 21 51 56 41 49 44 13 -0.95 - 40 0 0 51 12 43 20 51 25.9 12 71 -12 51 58 46 50 27 22 52 19 38 50 7 15 -0.95 - 39 0 0 51 35 27 20 51 24.2 13 72 -13 52 21 28 50 50 8 52 42 20 50 30 2 -0.95 - 38 0 0 51 57 56 20 51 22.4 13 72 -13 52 43 55 51 12 39 53 4 45 50 52 34 -0.95 - 37 0 0 52 20 9 20 51 20.6 14 73 -14 53 6 5 51 34 54 53 26 54 51 14 50 -0.95 - 36 0 0 52 42 6 20 51 18.6 15 74 -14 53 27 59 51 56 54 53 48 47 51 36 51 -0.95 - 35 0 0 53 3 46 20 51 16.6 16 75 -15 53 49 36 52 18 37 54 10 22 51 58 35 -0.95 - 34 0 0 53 25 9 20 51 14.5 16 76 -16 54 10 55 52 40 3 54 31 40 52 20 3 -0.95 - 33 0 0 53 46 15 20 51 12.4 17 77 -16 54 31 58 53 1 13 54 52 41 52 41 14 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283 0 45 50 47 44 19 43 46 11 34 43 59 41 -0.99 147 0 0 44 39 28 20 41 26.7 17 284 1 45 25 18 43 54 20 45 46 4 43 34 18 -0.99 148 0 0 44 13 57 20 41 24.1 16 285 2 44 59 43 43 28 51 45 20 27 43 8 51 -0.99 149 0 0 43 48 21 20 41 21.6 15 285 2 44 34 3 43 3 18 44 54 46 42 43 19 -0.99 150 0 0 43 22 40 20 41 19.3 14 286 3 44 8 20 42 37 41 44 29 1 42 17 44 -1.00 151 0 0 42 56 56 20 41 17.1 14 287 4 43 42 32 42 12 1 44 3 12 41 52 5 -1.00 152 0 0 42 31 10 20 41 14.9 13 287 5 43 16 42 41 46 19 43 37 20 41 26 25 -1.00 153 0 0 42 5 23 20 41 12.9 12 288 6 42 50 50 41 20 35 43 11 26 41 0 43 -1.01 154 0 0 41 39 34 20 41 11.1 11 289 6 42 24 57 40 54 51 42 45 31 40 35 1 -1.01 155 0 0 41 13 46 20 41 9.3 10 290 7 41 59 4 40 29 7 42 19 35 40 9 18 -1.02 156 0 0 40 47 58 20 41 7.7 9 290 8 41 33 11 40 3 23 41 53 40 39 43 37 -1.02 157 0 0 40 22 11 20 41 6.2 9 291 9 41 7 19 39 37 42 41 27 46 39 17 57 -1.03 158 0 0 39 56 27 20 41 4.8 8 292 10 40 41 29 39 12 2 41 1 54 38 52 20 -1.04 159 0 0 39 30 45 20 41 3.6 7 292 11 40 15 43 38 46 26 40 36 5 38 26 46 -1.05 160 0 0 39 5 8 20 41 2.5 6 293 12 39 50 0 38 20 54 40 10 19 38 1 16 -1.06 161 0 0 38 39 35 20 41 1.6 5 293 12 39 24 21 37 55 27 39 44 38 37 35 51 -1.08 162 0 0 38 14 7 20 41 0.8 4 294 13 38 58 48 37 30 5 39 19 2 37 10 32 -1.11 163 0 0 37 48 46 20 41 0.1 3 295 14 38 33 20 37 4 49 38 53 32 36 45 19 -1.15 164 0 0 37 23 32 20 40 59.6 2 295 15 38 8 0 36 39 41 38 28 9 36 20 13 -1.22 165 0 0 36 58 25 20 40 59.3 1 296 16 37 42 47 36 14 40 38 2 53 35 55 15 -1.38 166 0 0 36 33 27 20 40 59.1 1 297 17 37 17 43 35 49 48 37 37 46 35 30 26 -2.03 0 0 0 .. .. .... .. .. .. .. .. .. 36 52 48 .. .. .. 37 12 48 .. .. .. .... Uncertainty in time = +/- 3 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: HIP 11762 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 31 47.8418 DE: +21 22 30.900 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 31 47.8419 DE: +21 22 30.901 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 7.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (595) Polyxena asteroid class: approx. diameter [km]: 104 approx. diameter ["]: 0.064 distance from Earth [AU]: 2.24860 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#103 date of fit: 2023 Oct 09 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): 0.022", 0.001", 54.34° remarks: * orbital elements for (595)Polyxena : Mean anomaly = 85.1803052974 deg Arg. of pericenter = 281.2714287552 deg Long. of node = 23.8634881283 deg Inclination = 17.8219745174 deg Eccentricity = 0.0668365186 Semimajor axis = 3.2159586162 AU Perihelion dist = 3.0010151383 AU Mag: H = 8.02, G = 0.15 Epoch of elements : MJD 60236.86534722 TDT (2023 Oct 19.8653) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1032023Oct09,7.32,2023,10,19,20.772185,0.058872,0.693336,-8.014454,0.682956,-0.001378,-0.001090,0.000001,0.000000 58.6405,21.4818,-135.34,-10.12,False HIP 11762,2.52995605,21.3752500,0.00,7.07,0.00,0.0,0,,2.55259606,21.4817956,5.65,0.00,0,0,0 595,Polyxena,12.71,104.300,2.2486,0,0,-2.245,2.67,,5.2,0 0,85.0324,2023,10,19,281.2714,23.8635,17.8220,0.06684,3.21596,3.00102,7.98,5.0,0.15 1.224,0.0220,0.0013,54,0.0220,Known errors,-1.00,0,-1,-1 20231019__11762,60232.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 20:55 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org