IOTA/IOTA-ES occultation update for (33) Polyhymnia / TYC 6157-01534-1 event on 2023 Jul 19, 23:58 UT Visible from South America Summary ------- On 2023 Jul 19 UT, the 51.6 km diameter asteroid (33) Polyhymnia will occult a 10.3 mag star in the constellation Libra 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 3.42 mag to 13.63 mag (the magnitude of the asteroid) for at most 8.260 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: 100 * date and approx. time of event: 2023 Jul 19, 23:42 - 2023 Jul 20, 00:15 * geocentric midpoint of event [JD]: 2460145.49913604 * magnitude of target star: 10.26 * magnitude drop [mag]: 3.42 * estimated maximum duration [s]: 8.260 * Moon: 4 % sunlit, 81° distance * Sun: 105° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 5.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.001", 110°) * approx speed of asteroid's shadow [km/s]: 6.2441 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6157-01534-1 by 33 Polyhymnia on 2023 Jul 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 -153 0 0 30 50 34 23 42 31.9 0 110 69 30 35 2 .. .. .. 30 32 43 .. .. .. .... -152 0 0 30 31 19 23 42 32.0 1 111 68 30 15 46 30 46 53 30 13 26 30 49 13 -0.02 -151 0 0 30 11 46 23 42 32.4 2 111 67 29 56 12 30 27 21 29 53 51 30 29 41 -0.16 -150 0 0 29 51 54 23 42 33.1 3 112 66 29 36 19 30 7 31 29 33 58 30 9 51 -0.20 -149 0 0 29 31 44 23 42 34.1 4 112 66 29 16 8 29 47 22 29 13 47 29 49 43 -0.22 -148 0 0 29 11 17 23 42 35.4 5 113 65 28 55 39 29 26 56 28 53 18 29 29 18 -0.24 -147 0 0 28 50 32 23 42 37.0 6 113 64 28 34 52 29 6 13 28 32 31 29 8 34 -0.25 -146 0 0 28 29 29 23 42 38.9 7 114 63 28 13 49 28 45 11 28 11 27 28 47 33 -0.25 -145 0 0 28 8 9 23 42 41.1 8 114 63 27 52 28 28 23 53 27 50 6 28 26 15 -0.26 -144 0 0 27 46 33 23 42 43.6 9 115 62 27 30 50 28 2 17 27 28 28 28 4 39 -0.26 -143 0 0 27 24 40 23 42 46.4 9 115 61 27 8 55 27 40 25 27 6 33 27 42 47 -0.26 -142 0 0 27 2 30 23 42 49.5 10 116 60 26 46 44 27 18 17 26 44 22 27 20 39 -0.27 -141 0 0 26 40 4 23 42 53.0 11 116 59 26 24 17 26 55 52 26 21 55 26 58 15 -0.27 -140 0 0 26 17 23 23 42 56.8 12 117 58 26 1 35 26 33 12 25 59 13 26 35 35 -0.27 -139 0 0 25 54 26 23 43 0.9 13 117 57 25 38 37 26 10 16 25 36 14 26 12 39 -0.27 -138 0 0 25 31 14 23 43 5.4 14 117 56 25 15 24 25 47 6 25 13 1 25 49 29 -0.27 -137 0 0 25 7 48 23 43 10.2 15 118 56 24 51 57 25 23 40 24 49 34 25 26 4 -0.27 -136 0 0 24 44 7 23 43 15.3 16 118 55 24 28 15 25 0 1 24 25 52 25 2 24 -0.27 -135 0 0 24 20 13 23 43 20.8 17 119 54 24 4 20 24 36 7 24 1 57 24 38 31 -0.28 -134 0 0 23 56 5 23 43 26.7 18 119 53 23 40 11 24 12 1 23 37 48 24 14 24 -0.28 -133 0 0 23 31 45 23 43 32.9 19 120 52 23 15 50 23 47 41 23 13 26 23 50 5 -0.28 -132 0 0 23 7 12 23 43 39.4 20 120 51 22 51 16 23 23 9 22 48 53 23 25 33 -0.28 -131 0 0 22 42 27 23 43 46.3 21 121 50 22 26 30 22 58 25 22 24 7 23 0 49 -0.28 -130 0 0 22 17 31 23 43 53.6 23 121 49 22 1 34 22 33 30 21 59 10 22 35 54 -0.28 -129 0 0 21 52 24 23 44 1.2 24 122 48 21 36 26 22 8 24 21 34 2 22 10 48 -0.28 -128 0 0 21 27 7 23 44 9.2 25 122 47 21 11 8 21 43 7 21 8 45 21 45 31 -0.28 -127 0 0 21 1 40 23 44 17.6 26 122 46 20 45 41 21 17 41 20 43 17 21 20 5 -0.28 -126 0 0 20 36 5 23 44 26.3 27 123 45 20 20 5 20 52 6 20 17 41 20 54 30 -0.28 -125 0 0 20 10 20 23 44 35.4 28 123 44 19 54 20 20 26 22 19 51 56 20 28 47 -0.28 -124 0 0 19 44 28 23 44 44.8 29 124 43 19 28 28 20 0 31 19 26 4 20 2 55 -0.28 -123 0 0 19 18 29 23 44 54.6 30 124 42 19 2 28 19 34 32 19 0 4 19 36 57 -0.28 -122 0 0 18 52 24 23 45 4.8 31 125 41 18 36 23 19 8 27 18 33 58 19 10 51 -0.28 -121 0 0 18 26 13 23 45 15.4 32 125 40 18 10 11 18 42 16 18 7 47 18 44 40 -0.28 -120 0 0 17 59 56 23 45 26.2 33 126 38 17 43 55 18 16 0 17 41 30 18 18 24 -0.29 -119 0 0 17 33 36 23 45 37.5 34 126 37 17 17 34 17 49 39 17 15 10 17 52 4 -0.29 -118 0 0 17 7 12 23 45 49.1 35 127 36 16 51 10 17 23 15 16 48 45 17 25 40 -0.29 -117 0 0 16 40 45 23 46 1.1 36 127 35 16 24 43 16 56 48 16 22 18 16 59 13 -0.29 -116 0 0 16 14 15 23 46 13.4 37 128 34 15 58 14 16 30 19 15 55 49 16 32 44 -0.29 -115 0 0 15 47 45 23 46 26.0 38 128 33 15 31 43 16 3 48 15 29 19 16 6 13 -0.29 -114 0 0 15 21 14 23 46 39.0 39 129 32 15 5 13 15 37 17 15 2 48 15 39 42 -0.29 -113 0 0 14 54 43 23 46 52.4 40 129 31 14 38 42 15 10 46 14 36 18 15 13 11 -0.29 -112 0 0 14 28 14 23 47 6.0 42 130 30 14 12 13 14 44 16 14 9 49 14 46 41 -0.29 -111 0 0 14 1 46 23 47 20.0 43 130 29 13 45 46 14 17 48 13 43 22 14 20 13 -0.29 -110 0 0 13 35 21 23 47 34.4 44 131 28 13 19 21 13 51 23 13 16 57 13 53 47 -0.29 -109 0 0 13 9 0 23 47 49.0 45 131 26 12 53 0 13 25 0 12 50 36 13 27 25 -0.29 -108 0 0 12 42 42 23 48 3.9 46 132 25 12 26 44 12 58 43 12 24 20 13 1 7 -0.29 -107 0 0 12 16 30 23 48 19.2 47 133 24 12 0 32 12 32 30 11 58 8 12 34 54 -0.29 -106 0 0 11 50 24 23 48 34.7 48 133 23 11 34 27 12 6 23 11 32 3 12 8 47 -0.29 -105 0 0 11 24 25 23 48 50.5 49 134 22 11 8 28 11 40 23 11 6 5 11 42 47 -0.30 -104 0 0 10 58 33 23 49 6.6 50 135 21 10 42 37 11 14 30 10 40 14 11 16 54 -0.30 -103 0 0 10 32 50 23 49 23.0 51 135 20 10 16 55 10 48 46 10 14 31 10 51 10 -0.30 -102 0 0 10 7 15 23 49 39.7 52 136 19 9 51 21 10 23 11 9 48 58 10 25 34 -0.30 -101 0 0 9 41 51 23 49 56.5 53 137 17 9 25 58 9 57 45 9 23 35 10 0 9 -0.30 -100 0 0 9 16 38 23 50 13.7 54 138 16 9 0 46 9 32 31 8 58 23 9 34 54 -0.30 - 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2 33 14 - 1 58 57 -0.31 - 12 0 0 - 2 4 17 0 13 51.9 + 20 252 -69 - 2 19 11 - 1 49 21 - 2 21 26 - 1 47 6 -0.31 - 11 0 0 - 1 52 4 0 13 58.4 + 19 252 -69 - 2 6 59 - 1 37 7 - 2 9 14 - 1 34 52 -0.31 - 10 0 0 - 1 39 27 0 14 4.7 + 18 252 -69 - 1 54 23 - 1 24 29 - 1 56 38 - 1 22 14 -0.31 - 9 0 0 - 1 26 26 0 14 10.6 + 17 252 -69 - 1 41 24 - 1 11 27 - 1 43 38 - 1 9 12 -0.31 - 8 0 0 - 1 13 2 0 14 16.1 + 16 252 -70 - 1 28 1 - 0 58 2 - 1 30 16 - 0 55 47 -0.31 - 7 0 0 - 0 59 15 0 14 21.3 + 15 252 -70 - 1 14 15 - 0 44 14 - 1 16 30 - 0 41 58 -0.31 - 6 0 0 - 0 45 5 0 14 26.2 + 14 252 -70 - 1 0 6 - 0 30 3 - 1 2 22 - 0 27 48 -0.31 - 5 0 0 - 0 30 33 0 14 30.7 + 13 252 -70 - 0 45 35 - 0 15 30 - 0 47 51 - 0 13 14 -0.31 - 4 0 0 - 0 15 39 0 14 34.9 + 12 252 -69 - 0 30 42 - 0 0 35 - 0 32 58 0 1 41 -0.31 - 3 0 0 - 0 0 23 0 14 38.7 + 11 252 -69 - 0 15 28 0 14 43 - 0 17 43 0 16 59 -0.31 - 2 0 0 0 15 14 0 14 42.2 + 10 252 -69 0 0 9 0 30 21 - 0 2 7 0 32 38 -0.31 - 1 0 0 0 31 13 0 14 45.3 + 9 252 -69 0 16 6 0 46 21 0 13 50 0 48 37 -0.31 0 0 0 0 47 32 0 14 48.0 + 8 252 -68 0 32 24 1 2 42 0 30 8 1 4 58 -0.31 1 0 0 1 4 12 0 14 50.5 + 7 252 -68 0 49 3 1 19 23 0 46 46 1 21 39 -0.31 2 0 0 1 21 12 0 14 52.5 + 6 252 -68 1 6 1 1 36 24 1 3 45 1 38 41 -0.31 3 0 0 1 38 31 0 14 54.2 + 4 253 -67 1 23 20 1 53 44 1 21 3 1 56 2 -0.31 4 0 0 1 56 10 0 14 55.5 + 3 253 -67 1 40 57 2 11 24 1 38 40 2 13 42 -0.31 5 0 0 2 14 8 0 14 56.5 + 2 253 -66 1 58 54 2 29 23 1 56 37 2 31 41 -0.32 6 0 0 2 32 24 0 14 57.2 + 1 253 -65 2 17 9 2 47 41 2 14 52 2 49 59 -0.33 7 0 0 2 50 59 0 14 57.4 + 0 253 -65 2 35 42 3 6 17 2 33 25 3 8 35 -0.46 Uncertainty in time = +/- 5 secs Prediction of 2023 May 29.0 Data for the target star ------------------------ * name: TYC 6157-01534-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 36 26.2914 DE: -17 10 52.965 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 36 26.2911 DE: -17 10 52.964 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (33) Polyhymnia asteroid class: approx. diameter [km]: 52 approx. diameter ["]: 0.030 distance from Earth [AU]: 2.33760 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#64 date of fit: 2023 Apr 24 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): 0.019", 0.001", 110.024° remarks: * orbital elements for (33)Polyhymnia : Mean anomaly = 294.2477074706 deg Arg. of pericenter = 338.5783215527 deg Long. of node = 8.4398946918 deg Inclination = 1.8522657894 deg Eccentricity = 0.3317100536 Semimajor axis = 2.8735740474 AU Perihelion dist = 1.9203806460 AU Mag: H = 8.54, G = 0.33 Epoch of elements : MJD 60144.99881944 TDT (2023 Jul 19.9988) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#642023Apr24,8.26,2023,7,19,23.979265,0.077372,0.293599,3.410170,-0.889860,0.005134,-0.001613,0.000000,0.000000 -77.7712,-17.2842,-178.09,20.74,False TYC 6157-01534-1,14.60730318,-17.1813792,0.00,10.26,0.00,0.0,0,,14.62906084,-17.2842095,3.41,0.00,0,0,0 33,Polyhymnia,13.63,51.6,2.3376,0,0,0.896,-3.35,,3.4,0 0,294.0456,2023,7,19,338.5783,8.4399,1.8523,0.33171,2.87357,1.92038,8.54,5.0,0.15 1.075,0.0193,0.0014,110,0.0023,Known errors,-1.00,-1,-1,-1 20230719_1534-1,60092.98 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 28, 23:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org