IOTA/IOTA-ES occultation update for (5011) Ptah / UCAC4 298-142617 event on 2024 Oct 08, 05:59 UT Visible from Summary ------- On 2024 Oct 08 UT, the 1.57730388471608 km diameter asteroid (5011) Ptah will occult a 9.6 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 12.12 mag to 21.76 mag (the magnitude of the asteroid) for at most 0.090 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 Oct 08, 05:55 - 2024 Oct 08, 06:04 * geocentric midpoint of event [JD]: 2460591.74981016 * magnitude of target star: 9.64 * magnitude drop [mag]: 12.12 * estimated maximum duration [s]: 0.090 * Moon: 25 % sunlit, 14° distance * Sun: 74° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 2 * 1 sigma uncertainty interval [path widths]: +/- 12.39 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.013", 92°) * approx speed of asteroid's shadow [km/s]: 21.6000 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 298-142617 by 5011 Ptah on 2024 Oct 8 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 83 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 15 40 27 .. .. .. ... .. .. ... .. .. .... 84 0 0 15 21 35 5 55 20.3 1 122 68 15 20 53 15 22 16 15 4 35 15 38 37 15 21 12 15 21 58 .... 85 0 0 14 45 58 5 55 20.4 2 122 69 14 45 17 14 46 40 14 29 2 15 2 58 14 45 36 14 46 21 -0.28 86 0 0 14 10 42 5 55 20.8 3 123 70 14 10 1 14 11 23 13 53 49 14 27 38 14 10 19 14 11 4 -0.35 87 0 0 13 35 46 5 55 21.2 4 123 70 13 35 5 13 36 27 13 18 56 13 52 38 13 35 23 13 36 8 -0.39 88 0 0 13 1 12 5 55 21.8 6 123 71 13 0 31 13 1 53 12 44 25 13 18 1 13 0 49 13 1 34 -0.41 89 0 0 12 27 1 5 55 22.5 7 123 71 12 26 20 12 27 42 12 10 18 12 43 47 12 26 38 12 27 23 -0.43 90 0 0 11 53 14 5 55 23.3 8 124 72 11 52 33 11 53 54 11 36 34 12 9 56 11 52 51 11 53 36 -0.44 91 0 0 11 19 51 5 55 24.3 9 124 72 11 19 11 11 20 32 11 3 15 11 36 30 11 19 29 11 20 14 -0.44 92 0 0 10 46 55 5 55 25.3 10 124 73 10 46 14 10 47 35 10 30 22 11 3 30 10 46 32 10 47 17 -0.45 93 0 0 10 14 24 5 55 26.5 11 124 73 10 13 44 10 15 5 9 57 55 10 30 56 10 14 2 10 14 46 -0.45 94 0 0 9 42 21 5 55 27.9 12 124 73 9 41 41 9 43 1 9 25 56 9 58 50 9 41 59 9 42 43 -0.46 95 0 0 9 10 47 5 55 29.3 13 125 73 9 10 7 9 11 26 8 54 24 9 27 11 9 10 25 9 11 9 -0.46 96 0 0 8 39 41 5 55 30.9 15 125 73 8 39 1 8 40 20 8 23 22 8 56 2 8 39 19 8 40 2 -0.46 97 0 0 8 9 4 5 55 32.6 16 125 73 8 8 25 8 9 44 7 52 49 8 25 22 8 8 42 8 9 26 -0.47 98 0 0 7 38 58 5 55 34.4 17 125 73 7 38 19 7 39 38 7 22 46 7 55 13 7 38 36 7 39 20 -0.47 99 0 0 7 9 23 5 55 36.3 18 125 73 7 8 44 7 10 2 6 53 15 7 25 34 7 9 1 7 9 45 -0.47 100 0 0 6 40 19 5 55 38.3 19 125 73 6 39 40 6 40 59 6 24 15 6 56 27 6 39 58 6 40 41 -0.47 101 0 0 6 11 48 5 55 40.4 20 126 72 6 11 9 6 12 27 5 55 46 6 27 52 6 11 26 6 12 9 -0.48 102 0 0 5 43 49 5 55 42.7 21 126 72 5 43 10 5 44 28 5 27 51 5 59 49 5 43 27 5 44 10 -0.48 103 0 0 5 16 23 5 55 45.0 22 126 71 5 15 44 5 17 2 5 0 28 5 32 20 5 16 2 5 16 44 -0.48 104 0 0 4 49 31 5 55 47.5 23 126 71 4 48 52 4 50 10 4 33 40 5 5 25 4 49 10 4 49 52 -0.48 105 0 0 4 23 13 5 55 50.1 24 126 70 4 22 34 4 23 51 4 7 25 4 39 3 4 22 52 4 23 34 -0.48 106 0 0 3 57 29 5 55 52.7 25 127 69 3 56 51 3 58 7 3 41 44 4 13 16 3 57 8 3 57 50 -0.48 107 0 0 3 32 20 5 55 55.5 27 127 69 3 31 42 3 32 58 3 16 39 3 48 4 3 31 59 3 32 41 -0.48 108 0 0 3 7 46 5 55 58.3 28 127 68 3 7 8 3 8 24 2 52 8 3 23 27 3 7 25 3 8 7 -0.48 109 0 0 2 43 48 5 56 1.3 29 127 67 2 43 10 2 44 26 2 28 13 2 59 26 2 43 27 2 44 9 -0.49 110 0 0 2 20 26 5 56 4.3 30 127 66 2 19 48 2 21 4 2 4 54 2 36 0 2 20 5 2 20 47 -0.49 111 0 0 1 57 40 5 56 7.5 31 128 66 1 57 2 1 58 17 1 42 10 2 13 11 1 57 19 1 58 0 -0.49 112 0 0 1 35 30 5 56 10.7 32 128 65 1 34 52 1 36 7 1 20 4 1 50 58 1 35 9 1 35 50 -0.49 113 0 0 1 13 56 5 56 14.0 33 128 64 1 13 19 1 14 34 0 58 33 1 29 22 1 13 36 1 14 17 -0.49 114 0 0 0 53 0 5 56 17.4 34 128 63 0 52 23 0 53 37 0 37 39 1 8 22 0 52 39 0 53 20 -0.49 115 0 0 0 32 40 5 56 20.9 35 129 62 0 32 3 0 33 18 0 17 23 0 48 0 0 32 20 0 33 1 -0.49 116 0 0 0 12 58 5 56 24.4 36 129 61 0 12 21 0 13 35 - 0 2 17 0 28 15 0 12 38 0 13 19 -0.49 117 0 0 - 0 6 7 5 56 28.1 37 129 60 - 0 6 44 - 0 5 30 - 0 21 19 0 9 8 - 0 6 27 - 0 5 46 -0.49 118 0 0 - 0 24 34 5 56 31.8 38 129 59 - 0 25 11 - 0 23 57 - 0 39 44 - 0 9 22 - 0 24 54 - 0 24 14 -0.49 119 0 0 - 0 42 24 5 56 35.5 39 130 58 - 0 43 1 - 0 41 47 - 0 57 31 - 0 27 14 - 0 42 44 - 0 42 3 -0.49 120 0 0 - 0 59 36 5 56 39.4 40 130 57 - 1 0 13 - 0 58 59 - 1 14 41 - 0 44 29 - 0 59 56 - 0 59 16 -0.49 121 0 0 - 1 16 10 5 56 43.3 41 130 56 - 1 16 47 - 1 15 33 - 1 31 13 - 1 1 5 - 1 16 30 - 1 15 50 -0.49 122 0 0 - 1 32 6 5 56 47.3 42 131 55 - 1 32 43 - 1 31 30 - 1 47 7 - 1 17 4 - 1 32 26 - 1 31 46 -0.49 123 0 0 - 1 47 25 5 56 51.3 42 131 54 - 1 48 1 - 1 46 48 - 2 2 23 - 1 32 24 - 1 47 45 - 1 47 4 -0.50 124 0 0 - 2 2 5 5 56 55.5 43 132 54 - 2 2 41 - 2 1 28 - 2 17 1 - 1 47 7 - 2 2 25 - 2 1 45 -0.50 125 0 0 - 2 16 7 5 56 59.6 44 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40 -0.50 -174 0 0 3 39 15 6 2 5.7 49 213 -10 3 38 36 3 39 53 3 23 30 3 55 2 3 38 54 3 39 36 -0.50 -173 0 0 4 4 46 6 2 10.4 48 213 -11 4 4 8 4 5 25 3 48 58 4 20 36 4 4 25 4 5 7 -0.50 -172 0 0 4 30 53 6 2 15.1 47 214 -12 4 30 14 4 31 32 4 15 2 4 46 47 4 30 32 4 31 14 -0.50 -171 0 0 4 57 35 6 2 19.8 46 215 -13 4 56 56 4 58 14 4 41 40 5 13 32 4 57 14 4 57 56 -0.50 -170 0 0 5 24 52 6 2 24.3 45 215 -14 5 24 13 5 25 31 5 8 54 5 40 53 5 24 31 5 25 13 -0.50 -169 0 0 5 52 43 6 2 28.9 44 216 -15 5 52 4 5 53 22 5 36 41 6 8 47 5 52 22 5 53 5 -0.50 -168 0 0 6 21 8 6 2 33.3 43 217 -16 6 20 29 6 21 47 6 5 3 6 37 16 6 20 47 6 21 30 -0.50 -167 0 0 6 50 7 6 2 37.7 42 217 -17 6 49 27 6 50 46 6 33 58 7 6 18 6 49 45 6 50 28 -0.50 -166 0 0 7 19 38 6 2 42.0 41 218 -18 7 18 58 7 20 17 7 3 26 7 35 53 7 19 16 7 20 0 -0.50 -165 0 0 7 49 41 6 2 46.2 40 218 -19 7 49 2 7 50 21 7 33 25 8 6 0 7 49 20 7 50 3 -0.50 -164 0 0 8 20 16 6 2 50.3 39 219 -20 8 19 37 8 20 56 8 3 57 8 36 39 8 19 54 8 20 38 -0.50 -163 0 0 8 51 22 6 2 54.4 38 219 -21 8 50 42 8 52 2 8 34 59 9 7 48 8 51 0 8 51 44 -0.50 -162 0 0 9 22 58 6 2 58.4 37 220 -23 9 22 18 9 23 38 9 6 32 9 39 28 9 22 36 9 23 20 -0.50 -161 0 0 9 55 4 6 3 2.3 36 220 -24 9 54 24 9 55 44 9 38 34 10 11 37 9 54 42 9 55 26 -0.50 -160 0 0 10 27 38 6 3 6.1 35 221 -25 10 26 58 10 28 18 10 11 4 10 44 15 10 27 16 10 28 0 -0.50 -159 0 0 11 0 40 6 3 9.8 34 221 -26 11 0 0 11 1 21 10 44 3 11 17 20 11 0 18 11 1 3 -0.50 -158 0 0 11 34 9 6 3 13.4 33 222 -27 11 33 29 11 34 50 11 17 28 11 50 53 11 33 47 11 34 32 -0.50 -157 0 0 12 8 4 6 3 16.9 32 222 -28 12 7 24 12 8 45 11 51 20 12 24 52 12 7 42 12 8 27 -0.50 -156 0 0 12 42 25 6 3 20.3 31 223 -29 12 41 44 12 43 6 12 25 37 12 59 16 12 42 2 12 42 47 -0.50 -155 0 0 13 17 9 6 3 23.6 29 223 -30 13 16 28 13 17 50 13 0 17 13 34 4 13 16 46 13 17 32 -0.50 -154 0 0 13 52 17 6 3 26.8 28 223 -31 13 51 35 13 52 58 13 35 22 14 9 14 13 51 54 13 52 39 -0.50 -153 0 0 14 27 46 6 3 29.8 27 224 -31 14 27 5 14 28 28 14 10 48 14 44 47 14 27 23 14 28 9 -0.50 -152 0 0 15 3 37 6 3 32.8 26 224 -32 15 2 55 15 4 18 14 46 35 15 20 41 15 3 14 15 4 0 -0.50 -151 0 0 15 39 47 6 3 35.7 25 225 -33 15 39 6 15 40 29 15 22 42 15 56 55 15 39 24 15 40 10 -0.50 -150 0 0 16 16 16 6 3 38.4 24 225 -34 16 15 34 16 16 58 15 59 8 16 33 27 16 15 53 16 16 39 -0.50 -149 0 0 16 53 3 6 3 41.0 23 225 -35 16 52 21 16 53 45 16 35 52 17 10 17 16 52 40 16 53 26 -0.50 -148 0 0 17 30 6 6 3 43.5 22 226 -36 17 29 24 17 30 48 17 12 51 17 47 23 17 29 42 17 30 29 -0.50 -147 0 0 18 7 23 6 3 45.9 21 226 -37 18 6 41 18 8 5 17 50 6 18 24 44 18 7 0 18 7 47 -0.50 -146 0 0 18 44 55 6 3 48.1 19 227 -38 18 44 13 18 45 37 18 27 35 19 2 18 18 44 32 18 45 18 -0.50 -145 0 0 19 22 39 6 3 50.2 18 227 -39 19 21 56 19 23 21 19 5 16 19 40 5 19 22 15 19 23 2 -0.50 -144 0 0 20 0 34 6 3 52.2 17 227 -40 19 59 51 20 1 16 19 43 8 20 18 2 20 0 10 20 0 57 -0.50 -143 0 0 20 38 38 6 3 54.1 16 228 -40 20 37 56 20 39 21 20 21 10 20 56 9 20 38 15 20 39 2 -0.50 -142 0 0 21 16 51 6 3 55.9 15 228 -41 21 16 8 21 17 34 20 59 21 21 34 25 21 16 27 21 17 14 -0.50 -141 0 0 21 55 11 6 3 57.5 14 229 -42 21 54 28 21 55 53 21 37 38 22 12 47 21 54 47 21 55 34 -0.50 -140 0 0 22 33 36 6 3 59.0 13 229 -43 22 32 53 22 34 19 22 16 1 22 51 14 22 33 12 22 34 0 -0.50 -139 0 0 23 12 5 6 4 0.3 12 229 -44 23 11 22 23 12 48 22 54 28 23 29 46 23 11 42 23 12 29 -0.50 -138 0 0 23 50 37 6 4 1.5 10 230 -44 23 49 54 23 51 20 23 32 59 24 8 20 23 50 14 23 51 1 -0.50 -137 0 0 24 29 11 6 4 2.6 9 230 -45 24 28 28 24 29 54 24 11 30 24 46 55 24 28 47 24 29 34 -0.50 -136 0 0 25 7 44 6 4 3.6 8 231 -46 25 7 1 25 8 27 24 50 2 25 25 30 25 7 20 25 8 8 -0.50 -135 0 0 25 46 16 6 4 4.5 7 231 -46 25 45 32 25 46 59 25 28 32 26 4 3 25 45 52 25 46 39 -0.50 -134 0 0 26 24 44 6 4 5.2 6 232 -47 26 24 1 26 25 28 26 6 59 26 42 33 26 24 20 26 25 8 -0.50 -133 0 0 27 3 9 6 4 5.8 5 232 -48 27 2 25 27 3 52 26 45 22 27 20 58 27 2 45 27 3 32 -0.51 -132 0 0 27 41 27 6 4 6.3 4 233 -48 27 40 44 27 42 11 27 23 40 27 59 18 27 41 3 27 41 51 -0.51 -131 0 0 28 19 39 6 4 6.6 3 233 -49 28 18 55 28 20 22 28 1 51 28 37 30 28 19 15 28 20 3 -0.52 -130 0 0 28 57 42 6 4 6.8 2 234 -49 28 56 58 28 58 25 28 39 53 29 15 34 28 57 18 28 58 6 -0.53 -129 0 0 29 35 35 6 4 6.9 1 234 -50 29 34 52 29 36 19 29 17 46 29 53 28 29 35 11 29 35 59 -0.59 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 298-142617 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 56 51.2229 DE: -30 28 31.556 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 56 51.2228 DE: -30 28 31.556 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.6 * B mag [mag]: 10.8 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5011) Ptah asteroid class: approx. diameter [km]: 2 approx. diameter ["]: 0.001 distance from Earth [AU]: 2.52110 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): 0.017", 0.013", 92.395° remarks: * orbital elements for (5011)Ptah : Mean anomaly = 169.5415825643 deg Arg. of pericenter = 105.9403605412 deg Long. of node = 10.6333926267 deg Inclination = 7.4092220525 deg Eccentricity = 0.5000858200 Semimajor axis = 1.6360458328 AU Perihelion dist = 0.8178825109 AU Mag: H = 16.71, G = 0.15 Epoch of elements : MJD 60591.24981000 TDT (2024 Oct 08.2498) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1542022May25,0.09,2024,10,8,5.995444,-0.065745,0.446140,12.062520,1.769751,0.005420,-0.000204,0.000000,0.000000 162.3124,-30.4801,86.94,-6.09,False UCAC4 298-142617,17.94756195,-30.4754324,10.76,9.64,9.04,0.2,0,,17.97394051,-30.4801300,12.12,12.27,0,0,0 5011,Ptah,21.76,1.943,2.5211,0,0,3.255,6.18,,0.2,0 0,169.4239,2024,10,8,105.9404,10.6334,7.4092,0.50009,1.63605,0.81788,16.71,5.0,0.15 12.832,0.0170,0.0130,92,0.0132,Known errors,0.73,0,-1,-1 20241008_142617,60140.62 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org