IOTA/IOTA-ES occultation update for (16) Psyche / UCAC4 381-166238 event on 2024 Jul 17, 05:37 UT Visible from Summary ------- On 2024 Jul 17 UT, the 248.761 km diameter asteroid (16) Psyche will occult a 11.3 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.32 mag to 10.16 mag (the magnitude of the asteroid) for at most 29.060 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: 2024 Jul 17, 05:31 - 2024 Jul 17, 05:43 * geocentric midpoint of event [JD]: 2460508.73427671 * magnitude of target star: 11.31 * magnitude drop [mag]: 0.32 * estimated maximum duration [s]: 29.060 * Moon: 80 % sunlit, 77° distance * Sun: 157° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 648 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 6.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.044, +/- 0.021) * 1 sigma uncertainty ellipse (major, minor, PA): (0.045", 0.019", 75°) * approx speed of asteroid's shadow [km/s]: 8.5603 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 381-166238 by 16 Psyche on 2024 Jul 17 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 ' " Longitude Longitude Longitude Longitude - 58 43 16 76 0 0 5 32 41.7 0 180 8 ... .. .. - 46 58 7 ... .. .. ... .. .. .... - 58 50 10 75 0 0 5 32 42.1 1 180 7 - 71 18 23 - 47 48 5 - 74 7 0 - 45 40 40 -1.34 - 59 5 45 74 0 0 5 32 43.1 2 180 6 - 70 47 35 - 48 40 41 - 73 24 25 - 46 40 17 -1.85 - 59 28 37 73 0 0 5 32 44.8 3 179 5 - 70 31 9 - 49 35 40 - 72 58 15 - 47 41 21 -2.04 - 59 57 42 72 0 0 5 32 47.0 4 179 4 - 70 26 38 - 50 32 46 - 72 45 35 - 48 43 48 -2.15 - 60 32 14 71 0 0 5 32 49.9 5 178 3 - 70 32 11 - 51 31 52 - 72 44 13 - 49 47 35 -2.22 - 61 11 34 70 0 0 5 32 53.4 6 178 2 - 70 46 22 - 52 32 48 - 72 52 31 - 50 52 42 -2.26 - 61 55 12 69 0 0 5 32 57.5 7 177 1 - 71 8 8 - 53 35 30 - 73 9 15 - 51 59 5 -2.30 - 62 42 46 68 0 0 5 33 2.3 8 176 0 - 71 36 39 - 54 39 54 - 73 33 26 - 53 6 46 -2.32 - 63 33 58 67 0 0 5 33 7.8 9 175 -1 - 72 11 17 - 55 46 0 - 74 4 19 - 54 15 46 -2.34 - 64 28 36 66 0 0 5 33 13.9 10 174 -2 - 72 51 29 - 56 53 48 - 74 41 20 - 55 26 8 -2.36 - 65 26 30 65 0 0 5 33 20.7 11 173 -3 - 73 36 53 - 58 3 17 - 75 24 1 - 56 37 55 -2.37 - 66 27 32 64 0 0 5 33 28.2 12 172 -4 - 74 27 15 - 59 14 30 - 76 12 7 - 57 51 10 -2.39 - 67 31 41 63 0 0 5 33 36.4 13 171 -5 - 75 22 21 - 60 27 29 - 77 5 20 - 59 5 57 -2.39 - 68 38 54 62 0 0 5 33 45.3 14 170 -6 - 76 22 4 - 61 42 19 - 78 3 34 - 60 22 19 -2.40 - 69 49 11 61 0 0 5 33 55.0 15 169 -7 - 77 26 23 - 62 59 3 - 79 6 45 - 61 40 24 -2.41 - 71 2 35 60 0 0 5 34 5.4 16 168 -9 - 78 35 18 - 64 17 48 - 80 14 56 - 63 0 17 -2.41 - 72 19 13 59 0 0 5 34 16.6 17 167 -10 - 79 48 55 - 65 38 40 - 81 28 11 - 64 22 6 -2.42 - 73 39 11 58 0 0 5 34 28.6 17 165 -11 - 81 7 23 - 67 1 46 - 82 46 43 - 65 45 58 -2.42 - 75 2 41 57 0 0 5 34 41.5 18 164 -12 - 82 30 59 - 68 27 17 - 84 10 48 - 67 12 3 -2.43 - 76 29 54 56 0 0 5 34 55.2 19 162 -13 - 84 0 4 - 69 55 23 - 85 40 52 - 68 40 32 -2.43 - 78 1 8 55 0 0 5 35 9.9 20 161 -14 - 85 35 7 - 71 26 17 - 87 17 29 - 70 11 35 -2.43 - 79 36 44 54 0 0 5 35 25.5 20 159 -15 - 87 16 47 - 73 0 14 - 89 1 26 - 71 45 30 -2.43 - 81 17 9 53 0 0 5 35 42.0 21 157 -16 - 89 5 58 - 74 37 32 - 90 53 47 - 73 22 31 -2.43 - 83 2 55 52 0 0 5 35 59.7 21 155 -17 - 91 3 51 - 76 18 31 - 92 56 1 - 75 2 59 -2.43 - 84 54 46 51 0 0 5 36 18.4 22 153 -18 - 93 12 8 - 78 3 37 - 95 10 20 - 76 47 18 -2.43 - 86 53 38 50 0 0 5 36 38.5 22 151 -19 - 95 33 20 - 79 53 21 - 97 40 4 - 78 35 54 -2.44 - 89 0 45 49 0 0 5 36 59.8 22 149 -20 - 98 11 18 - 81 48 21 -100 30 42 - 80 29 23 -2.44 Latitude Latitude Latitude Latitude - 90 0 0 48 33 28 5 37 9.8 22 148 -20 52 31 54 45 16 25 53 28 7 44 40 0 -2.44 - 91 0 0 48 7 31 5 37 19.8 22 147 -21 52 1 53 44 52 46 52 56 49 44 16 42 -2.44 - 92 0 0 47 42 29 5 37 29.7 22 146 -21 51 33 5 44 29 53 52 26 50 43 54 9 -2.44 - 93 0 0 47 18 22 5 37 39.7 22 145 -21 51 5 27 44 7 48 51 58 8 43 32 23 -2.44 - 94 0 0 46 55 9 5 37 49.5 22 144 -21 50 38 58 43 46 30 51 30 40 43 11 22 -2.44 - 95 0 0 46 32 49 5 37 59.3 22 143 -22 50 13 37 43 25 58 51 4 24 42 51 8 -2.44 - 96 0 0 46 11 23 5 38 9.0 22 142 -22 49 49 21 43 6 14 50 39 19 42 31 40 -2.44 - 97 0 0 45 50 49 5 38 18.6 22 141 -22 49 26 10 42 47 16 50 15 22 42 12 57 -2.44 - 98 0 0 45 31 8 5 38 28.1 22 140 -22 49 4 3 42 29 5 49 52 32 41 55 1 -2.44 - 99 0 0 45 12 20 5 38 37.4 21 139 -22 48 42 58 42 11 41 49 30 48 41 37 50 -2.44 -100 0 0 44 54 23 5 38 46.7 21 138 -22 48 22 56 41 55 4 49 10 9 41 21 26 -2.44 -101 0 0 44 37 19 5 38 55.8 21 137 -22 48 3 54 41 39 13 48 50 34 41 5 47 -2.44 -102 0 0 44 21 6 5 39 4.9 21 136 -22 47 45 52 41 24 10 48 32 2 40 50 55 -2.44 -103 0 0 44 5 45 5 39 13.7 20 135 -22 47 28 50 41 9 53 48 14 32 40 36 49 -2.45 -104 0 0 43 51 15 5 39 22.5 20 134 -22 47 12 48 40 56 23 47 58 4 40 23 29 -2.45 -105 0 0 43 37 37 5 39 31.0 20 134 -22 46 57 44 40 43 40 47 42 36 40 10 54 -2.45 -106 0 0 43 24 50 5 39 39.4 19 133 -22 46 43 39 40 31 44 47 28 9 39 59 6 -2.45 -107 0 0 43 12 54 5 39 47.7 19 132 -22 46 30 31 40 20 35 47 14 42 39 48 5 -2.45 -108 0 0 43 1 49 5 39 55.7 19 131 -22 46 18 21 40 10 13 47 2 14 39 37 50 -2.45 -109 0 0 42 51 36 5 40 3.6 18 130 -22 46 7 9 40 0 38 46 50 45 39 28 22 -2.45 -110 0 0 42 42 13 5 40 11.3 18 129 -22 45 56 53 39 51 51 46 40 16 39 19 40 -2.46 -111 0 0 42 33 41 5 40 18.8 17 128 -22 45 47 35 39 43 50 46 30 45 39 11 44 -2.46 -112 0 0 42 26 1 5 40 26.0 17 128 -21 45 39 14 39 36 36 46 22 12 39 4 35 -2.46 -113 0 0 42 19 12 5 40 33.1 16 127 -21 45 31 49 39 30 11 46 14 38 38 58 13 -2.46 -114 0 0 42 13 14 5 40 40.0 16 126 -21 45 25 21 39 24 32 46 8 2 38 52 37 -2.47 -115 0 0 42 8 7 5 40 46.6 15 125 -21 45 19 50 39 19 41 46 2 25 38 47 49 -2.47 -116 0 0 42 3 51 5 40 53.0 15 124 -20 45 15 16 39 15 37 45 57 45 38 43 47 -2.47 -117 0 0 42 0 27 5 40 59.2 14 124 -20 45 11 38 39 12 22 45 54 4 38 40 33 -2.48 -118 0 0 41 57 54 5 41 5.1 13 123 -20 45 8 57 39 9 54 45 51 21 38 38 6 -2.48 -119 0 0 41 56 13 5 41 10.8 13 122 -19 45 7 14 39 8 14 45 49 37 38 36 26 -2.49 -120 0 0 41 55 23 5 41 16.2 12 121 -19 45 6 27 39 7 22 45 48 50 38 35 34 -2.49 -121 0 0 41 55 26 5 41 21.4 12 121 -18 45 6 37 39 7 19 45 49 3 38 35 30 -2.50 -122 0 0 41 56 20 5 41 26.3 11 120 -18 45 7 45 39 8 4 45 50 14 38 36 14 -2.50 -123 0 0 41 58 7 5 41 30.9 10 119 -17 45 9 51 39 9 38 45 52 25 38 37 45 -2.51 -124 0 0 42 0 46 5 41 35.3 10 119 -17 45 12 55 39 12 1 45 55 35 38 40 5 -2.52 -125 0 0 42 4 19 5 41 39.3 9 118 -16 45 16 57 39 15 12 45 59 45 38 43 13 -2.52 -126 0 0 42 8 44 5 41 43.1 8 117 -16 45 21 57 39 19 13 46 4 54 38 47 10 -2.53 -127 0 0 42 14 2 5 41 46.6 8 116 -15 45 27 56 39 24 3 46 11 5 38 51 55 -2.54 -128 0 0 42 20 13 5 41 49.8 7 116 -15 45 34 55 39 29 42 46 18 16 38 57 29 -2.55 -129 0 0 42 27 19 5 41 52.7 6 115 -14 45 42 54 39 36 12 46 26 29 39 3 52 -2.57 -130 0 0 42 35 18 5 41 55.3 6 114 -14 45 51 53 39 43 31 46 35 44 39 11 5 -2.59 -131 0 0 42 44 12 5 41 57.6 5 114 -13 46 1 53 39 51 40 46 46 2 39 19 7 -2.61 -132 0 0 42 54 1 5 41 59.5 4 113 -12 46 12 54 40 0 40 46 57 23 39 27 59 -2.64 -133 0 0 43 4 44 5 42 1.1 3 112 -12 46 24 58 40 10 31 47 9 48 39 37 41 -2.68 -134 0 0 43 16 23 5 42 2.4 3 112 -11 46 38 4 40 21 12 47 23 19 39 48 13 -2.74 -135 0 0 43 28 58 5 42 3.4 2 111 -10 46 52 14 40 32 45 47 37 54 39 59 36 -2.86 -136 0 0 43 42 30 5 42 4.0 1 110 -10 .. .. .. 40 45 9 .. .. .. 40 11 49 -3.14 -137 0 0 43 56 58 5 42 4.3 0 110 -9 .. .. .. 40 58 25 .. .. .. 40 24 53 -4.82 -138 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 41 12 33 .. .. .. 40 38 48 .... -139 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 40 53 35 .... Uncertainty in time = +/- 7 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 381-166238 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 18 39.7327 DE: -13 54 58.078 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 18 39.7327 DE: -13 54 58.078 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (16) Psyche asteroid class: approx. diameter [km]: 249 approx. diameter ["]: 0.193 distance from Earth [AU]: 1.78070 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#91 date of fit: 2022 Feb 03 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): 0.045", 0.019", 75.375° remarks: * orbital elements for (16)Psyche : Mean anomaly = 303.7909892822 deg Arg. of pericenter = 229.5587151241 deg Long. of node = 150.0194478126 deg Inclination = 3.0971108255 deg Eccentricity = 0.1341517280 Semimajor axis = 2.9226905056 AU Perihelion dist = 2.5306065238 AU Mag: H = 6.14, G = 0.20 Epoch of elements : MJD 60508.23427725 TDT (2024 Jul 17.2343) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#912022Feb03,29.06,2024,7,17,5.622641,-0.347914,0.855350,-4.475615,-1.820462,-0.001981,-0.000788,0.000001,0.000000 -59.8741,-13.8119,97.22,21.10,False UCAC4 381-166238,21.31103686,-13.9161328,11.92,11.31,10.98,0.0,0,,21.33377517,-13.8119407,0.32,0.29,0,0,0 16,Psyche,10.16,248.761,1.7807,0,0,-1.517,-8.99,,14.0,0 0,303.7448,2024,7,17,229.5587,150.0194,3.0971,0.13415,2.92269,2.53061,6.14,5.0,0.15 1.101,0.0453,0.0187,75,0.0194,Known errors,1.04,0,-1,-1 20240717_166238,60140.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:55 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org