IOTA/IOTA-ES occultation update for (5011) Ptah / UCAC4 306-225376 event on 2024 Mar 04, 19:14 UT Visible from Summary ------- On 2024 Mar 04 UT, the 1.45822089121849 km diameter asteroid (5011) Ptah will occult a 12.7 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 7.84 mag to 20.51 mag (the magnitude of the asteroid) for at most 0.080 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: 5 * date and approx. time of event: 2024 Mar 04, 19:09 - 2024 Mar 04, 19:19 * geocentric midpoint of event [JD]: 2460374.30165454 * magnitude of target star: 12.67 * magnitude drop [mag]: 7.84 * estimated maximum duration [s]: 0.080 * Moon: 38 % sunlit, 6° distance * Sun: 70° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 2 * 1 sigma uncertainty interval [path widths]: +/- 12.44 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.015) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.015", 98°) * approx speed of asteroid's shadow [km/s]: 21.0366 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 306-225376 by 5011 Ptah on 2024 Mar 4 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 101 0 0 9 23 58 19 9 20.3 1 119 -65 9 23 28 9 24 28 9 10 44 9 37 11 .... 102 0 0 8 50 14 19 9 20.5 2 120 -64 8 49 45 8 50 44 8 37 0 9 3 29 0.04 103 0 0 8 16 20 19 9 20.7 3 120 -63 8 15 50 8 16 50 8 3 5 8 29 35 0.01 104 0 0 7 42 16 19 9 21.1 4 120 -62 7 41 46 7 42 46 7 29 1 7 55 32 -0.01 105 0 0 7 8 4 19 9 21.6 5 120 -61 7 7 34 7 8 33 6 54 47 7 21 20 -0.02 106 0 0 6 33 43 19 9 22.3 7 120 -60 6 33 13 6 34 13 6 20 26 6 47 0 -0.02 107 0 0 5 59 16 19 9 23.0 8 120 -59 5 58 46 5 59 45 5 45 59 6 12 33 -0.03 108 0 0 5 24 42 19 9 23.9 9 120 -58 5 24 13 5 25 12 5 11 25 5 38 0 -0.03 109 0 0 4 50 5 19 9 24.9 10 120 -57 4 49 35 4 50 34 4 36 47 5 3 22 -0.03 110 0 0 4 15 23 19 9 26.0 11 121 -56 4 14 53 4 15 53 4 2 5 4 28 41 -0.04 111 0 0 3 40 39 19 9 27.3 12 121 -55 3 40 9 3 41 9 3 27 21 3 53 57 -0.04 112 0 0 3 5 53 19 9 28.6 13 121 -54 3 5 23 3 6 23 2 52 36 3 19 11 -0.04 113 0 0 2 31 7 19 9 30.1 15 121 -52 2 30 37 2 31 37 2 17 49 2 44 25 -0.04 114 0 0 1 56 22 19 9 31.7 16 121 -51 1 55 52 1 56 51 1 43 4 2 9 39 -0.04 115 0 0 1 21 38 19 9 33.5 17 121 -50 1 21 8 1 22 8 1 8 20 1 34 55 -0.04 116 0 0 0 46 57 19 9 35.3 18 121 -49 0 46 27 0 47 26 0 33 40 1 0 14 -0.04 117 0 0 0 12 19 19 9 37.3 19 121 -48 0 11 50 0 12 49 - 0 0 57 0 25 36 -0.04 118 0 0 - 0 22 13 19 9 39.4 20 121 -47 - 0 22 43 - 0 21 43 - 0 35 29 - 0 8 57 -0.04 119 0 0 - 0 56 39 19 9 41.6 22 121 -46 - 0 57 9 - 0 56 10 - 1 9 55 - 0 43 24 -0.05 120 0 0 - 1 30 59 19 9 43.9 23 121 -45 - 1 31 28 - 1 30 29 - 1 44 13 - 1 17 44 -0.05 121 0 0 - 2 5 10 19 9 46.3 24 121 -44 - 2 5 40 - 2 4 40 - 2 18 24 - 1 51 56 -0.05 122 0 0 - 2 39 12 19 9 48.9 25 121 -43 - 2 39 42 - 2 38 42 - 2 52 25 - 2 25 59 -0.05 123 0 0 - 3 13 4 19 9 51.5 26 121 -42 - 3 13 34 - 3 12 34 - 3 26 16 - 2 59 52 -0.05 124 0 0 - 3 46 45 19 9 54.3 27 121 -41 - 3 47 14 - 3 46 15 - 3 59 56 - 3 33 33 -0.05 125 0 0 - 4 20 13 19 9 57.1 29 121 -39 - 4 20 43 - 4 19 44 - 4 33 24 - 4 7 3 -0.05 126 0 0 - 4 53 29 19 10 0.1 30 121 -38 - 4 53 58 - 4 52 59 - 5 6 38 - 4 40 20 -0.05 127 0 0 - 5 26 30 19 10 3.2 31 121 -37 - 5 27 0 - 5 26 1 - 5 39 38 - 5 13 22 -0.05 128 0 0 - 5 59 17 19 10 6.3 32 121 -36 - 5 59 46 - 5 58 48 - 6 12 24 - 5 46 10 -0.05 129 0 0 - 6 31 48 19 10 9.6 33 120 -35 - 6 32 17 - 6 31 18 - 6 44 53 - 6 18 42 -0.05 130 0 0 - 7 4 1 19 10 12.9 34 120 -34 - 7 4 31 - 7 3 32 - 7 17 5 - 6 50 57 -0.05 131 0 0 - 7 35 58 19 10 16.4 35 120 -33 - 7 36 27 - 7 35 29 - 7 49 0 - 7 22 55 -0.05 132 0 0 - 8 7 36 19 10 19.9 37 120 -32 - 8 8 5 - 8 7 6 - 8 20 37 - 7 54 35 -0.05 133 0 0 - 8 38 54 19 10 23.5 38 120 -31 - 8 39 24 - 8 38 25 - 8 51 54 - 8 25 55 -0.05 134 0 0 - 9 9 53 19 10 27.2 39 120 -30 - 9 10 22 - 9 9 24 - 9 22 51 - 8 56 55 -0.05 135 0 0 - 9 40 31 19 10 31.0 40 120 -28 - 9 41 0 - 9 40 2 - 9 53 27 - 9 27 35 -0.05 136 0 0 -10 10 48 19 10 34.8 41 120 -27 -10 11 17 -10 10 19 -10 23 42 - 9 57 53 -0.05 137 0 0 -10 40 42 19 10 38.8 42 120 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27 57 -0.05 -103 0 0 -12 12 40 19 19 8.5 19 243 83 -12 13 9 -12 12 12 -12 25 26 -11 59 54 -0.05 -102 0 0 -11 44 16 19 19 10.4 18 243 82 -11 44 45 -11 43 47 -11 57 3 -11 31 28 -0.05 -101 0 0 -11 15 28 19 19 12.1 17 243 82 -11 15 57 -11 15 0 -11 28 18 -11 2 39 -0.05 -100 0 0 -10 46 18 19 19 13.8 16 243 82 -10 46 47 -10 45 49 -10 59 9 -10 33 27 -0.05 - 99 0 0 -10 16 46 19 19 15.3 15 243 81 -10 17 14 -10 16 17 -10 29 38 -10 3 53 -0.05 - 98 0 0 - 9 46 51 19 19 16.8 14 242 80 - 9 47 20 - 9 46 22 - 9 59 46 - 9 33 57 -0.05 - 97 0 0 - 9 16 36 19 19 18.1 13 242 80 - 9 17 6 - 9 16 7 - 9 29 32 - 9 3 41 -0.05 - 96 0 0 - 8 46 1 19 19 19.3 11 242 79 - 8 46 30 - 8 45 32 - 8 58 59 - 8 33 4 -0.04 - 95 0 0 - 8 15 7 19 19 20.5 10 242 78 - 8 15 36 - 8 14 37 - 8 28 5 - 8 2 8 -0.04 - 94 0 0 - 7 43 53 19 19 21.5 9 242 77 - 7 44 22 - 7 43 24 - 7 56 53 - 7 30 53 -0.04 - 93 0 0 - 7 12 22 19 19 22.4 8 242 76 - 7 12 51 - 7 11 52 - 7 25 23 - 6 59 20 -0.04 - 92 0 0 - 6 40 33 19 19 23.1 7 242 75 - 6 41 2 - 6 40 4 - 6 53 36 - 6 27 30 -0.04 - 91 0 0 - 6 8 28 19 19 23.8 6 241 74 - 6 8 57 - 6 7 58 - 6 21 32 - 5 55 23 -0.03 - 90 0 0 - 5 36 7 19 19 24.4 5 241 73 - 5 36 36 - 5 35 38 - 5 49 12 - 5 23 1 -0.03 - 89 0 0 - 5 3 32 19 19 24.8 4 241 72 - 5 4 1 - 5 3 2 - 5 16 38 - 4 50 25 -0.02 - 88 0 0 - 4 30 42 19 19 25.1 2 241 71 - 4 31 12 - 4 30 13 - 4 43 50 - 4 17 34 0.00 - 87 0 0 - 3 57 40 19 19 25.3 1 241 70 - 3 58 10 - 3 57 11 - 4 10 49 - 3 44 31 0.05 - 86 0 0 - 3 24 26 19 19 25.4 0 241 69 - 3 24 55 - 3 23 56 - 3 37 35 - 3 11 16 0.97 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 306-225376 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 19 10.5256 DE: -28 54 18.756 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 19 10.5256 DE: -28 54 18.756 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.7 * B mag [mag]: 13.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5011) Ptah asteroid class: approx. diameter [km]: 1 approx. diameter ["]: 0.001 distance from Earth [AU]: 1.77560 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#154 date of fit: 2022 May 25 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): 0.020", 0.015", 98° remarks: * orbital elements for (5011)Ptah : Mean anomaly = 67.1362897586 deg Arg. of pericenter = 105.9336366285 deg Long. of node = 10.6416149565 deg Inclination = 7.4093946023 deg Eccentricity = 0.4999920249 Semimajor axis = 1.6361111238 AU Perihelion dist = 0.8180686100 AU Mag: H = 16.71, G = 0.15 Epoch of elements : MJD 60373.80165446 TDT (2024 Mar 04.8017) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1542022May25,0.08,2024,3,4,19.239709,0.008807,0.063609,11.772726,-1.544985,-0.004637,-0.000329,-0.000001,0.000000 -176.4591,-28.8956,-105.72,-6.02,False UCAC4 306-225376,18.31959038,-28.9052100,13.82,12.67,12.05,0.1,0,,18.34493297,-28.8956220,7.84,8.02,0,0,0 5011,Ptah,20.51,1.587,1.7756,0,0,4.440,-7.65,,0.2,0 0,66.7587,2024,3,4,105.9336,10.6416,7.4094,0.49999,1.63611,0.81807,16.71,5.0,0.15 13.859,0.0197,0.0153,98,0.0153,Known errors,0.73,0,-1,-1 20240304_225376,60139.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org