IOTA/IOTA-ES occultation update for (40) Harmonia / UCAC4 322-209261 event on 2024 Sep 07, 12:58 UT Visible from Summary ------- On 2024 Sep 07 UT, the 113.646 km diameter asteroid (40) Harmonia will occult a 11.8 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 0.36 mag to 10.84 mag (the magnitude of the asteroid) for at most 85.480 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 Sep 07, 12:25 - 2024 Sep 07, 13:30 * geocentric midpoint of event [JD]: 2460561.04032021 * magnitude of target star: 11.84 * magnitude drop [mag]: 0.36 * estimated maximum duration [s]: 85.480 * Moon: 17 % sunlit, 78° distance * Sun: 127° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 323 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 15.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.002", 85°) * approx speed of asteroid's shadow [km/s]: 1.3296 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 322-209261 by 40 Harmonia on 2024 Sep 7 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 67 0 0 .. .. .... .. .. .. .. .. .. 50 12 48 .. .. .. 50 7 58 .. .. .. .... 68 0 0 51 18 30 12 30 22.9 1 135 13 49 38 10 .. .. .. 49 33 25 .. .. .. .... 69 0 0 50 43 12 12 30 26.4 2 136 13 49 4 26 52 33 9 48 59 45 52 39 0 -1.35 70 0 0 50 8 57 12 30 33.2 2 136 12 48 31 37 51 56 51 48 27 0 52 2 34 -1.70 71 0 0 49 35 44 12 30 43.1 3 137 11 47 59 44 51 21 46 47 55 10 51 27 22 -1.86 72 0 0 49 3 34 12 30 56.3 4 138 11 47 28 48 50 47 55 47 24 17 50 53 25 -1.96 73 0 0 48 32 29 12 31 12.7 5 139 10 46 58 51 50 15 16 46 54 23 50 20 41 -2.03 74 0 0 48 2 29 12 31 32.3 6 140 9 46 29 53 49 43 52 46 25 28 49 49 12 -2.09 75 0 0 47 33 36 12 31 55.1 7 140 9 46 1 57 49 13 42 45 57 34 49 18 57 -2.13 76 0 0 47 5 51 12 32 21.1 7 141 8 45 35 4 48 44 47 45 30 43 48 49 58 -2.17 77 0 0 46 39 16 12 32 50.4 8 142 7 45 9 16 48 17 8 45 4 58 48 22 15 -2.21 78 0 0 46 13 52 12 33 22.8 9 143 6 44 44 35 47 50 46 44 40 18 47 55 50 -2.24 79 0 0 45 49 42 12 33 58.4 10 144 5 44 21 3 47 25 44 44 16 48 47 30 45 -2.27 80 0 0 45 26 45 12 34 37.2 11 145 5 43 58 43 47 2 2 43 54 29 47 7 0 -2.30 81 0 0 45 5 7 12 35 19.1 11 146 4 43 37 35 46 39 42 43 33 23 46 44 38 -2.33 82 0 0 44 44 48 12 36 4.0 12 147 3 43 17 43 46 18 46 43 13 32 46 23 40 -2.36 83 0 0 44 25 50 12 36 52.0 13 148 2 42 59 8 45 59 17 42 54 58 46 4 8 -2.39 84 0 0 44 8 15 12 37 43.0 14 149 1 42 41 54 45 41 15 42 37 45 45 46 5 -2.42 85 0 0 43 52 6 12 38 36.9 14 150 0 42 26 2 45 24 44 42 21 53 45 29 33 -2.45 86 0 0 43 37 25 12 39 33.7 15 151 -1 42 11 34 45 9 46 42 7 27 45 14 33 -2.48 87 0 0 43 24 14 12 40 33.3 16 152 -2 41 58 34 44 56 21 41 54 27 45 1 8 -2.51 88 0 0 43 12 37 12 41 35.5 16 153 -3 41 47 3 44 44 33 41 42 56 44 49 19 -2.53 89 0 0 43 2 34 12 42 40.3 17 154 -3 41 37 3 44 34 24 41 32 56 44 39 10 -2.56 90 0 0 42 54 8 12 43 47.7 17 155 -4 41 28 37 44 25 56 41 24 30 44 30 42 -2.59 91 0 0 42 47 21 12 44 57.3 18 156 -5 41 21 47 44 19 11 41 17 40 44 23 57 -2.61 92 0 0 42 42 16 12 46 9.2 18 157 -6 41 16 36 44 14 13 41 12 28 44 18 59 -2.63 93 0 0 42 38 54 12 47 23.2 19 158 -7 41 13 5 44 11 2 41 8 57 44 15 48 -2.65 94 0 0 42 37 18 12 48 39.1 19 160 -8 41 11 16 44 9 40 41 7 7 44 14 28 -2.67 95 0 0 42 37 29 12 49 56.8 19 161 -9 41 11 11 44 10 11 41 7 2 44 14 59 -2.68 96 0 0 42 39 30 12 51 16.0 20 162 -10 41 12 52 44 12 34 41 8 41 44 17 24 -2.69 97 0 0 42 43 21 12 52 36.7 20 163 -11 41 16 20 44 16 52 41 12 8 44 21 44 -2.70 98 0 0 42 49 4 12 53 58.5 20 165 -12 41 21 37 44 23 7 41 17 24 44 28 0 -2.71 99 0 0 42 56 41 12 55 21.3 20 166 -13 41 28 43 44 31 20 41 24 29 44 36 15 -2.71 100 0 0 43 6 11 12 56 44.9 20 167 -14 41 37 41 44 41 32 41 33 25 44 46 29 -2.71 101 0 0 43 17 37 12 58 9.0 20 168 -15 41 48 29 44 53 44 41 44 12 44 58 44 -2.70 102 0 0 43 30 59 12 59 33.5 20 170 -15 42 1 10 45 7 56 41 56 51 45 12 59 -2.69 103 0 0 43 46 17 13 0 58.0 20 171 -16 42 15 42 45 24 10 42 11 21 45 29 16 -2.68 104 0 0 44 3 31 13 2 22.3 20 172 -17 42 32 7 45 42 26 42 27 44 45 47 36 -2.66 105 0 0 44 22 42 13 3 46.2 20 174 -18 42 50 24 46 2 44 42 45 58 46 7 58 -2.65 106 0 0 44 43 49 13 5 9.5 20 175 -18 43 10 32 46 25 5 43 6 4 46 30 23 -2.63 107 0 0 45 6 51 13 6 31.8 19 176 -19 43 32 32 46 49 28 43 28 1 46 54 50 -2.60 108 0 0 45 31 48 13 7 53.0 19 178 -20 43 56 21 47 15 52 43 51 47 47 21 20 -2.58 109 0 0 45 58 39 13 9 12.8 18 179 -20 44 21 58 47 44 19 44 17 21 47 49 52 -2.56 110 0 0 46 27 23 13 10 30.9 18 180 -21 44 49 23 48 14 47 44 44 42 48 20 26 -2.54 111 0 0 46 57 59 13 11 47.2 18 181 -21 45 18 34 48 47 17 45 13 49 48 53 2 -2.51 112 0 0 47 30 25 13 13 1.3 17 183 -21 45 49 28 49 21 47 45 44 40 49 27 40 -2.49 113 0 0 48 4 42 13 14 13.1 16 184 -22 46 22 5 49 58 19 46 17 12 50 4 20 -2.47 114 0 0 48 40 46 13 15 22.3 16 185 -22 46 56 22 50 36 52 46 51 25 50 43 3 -2.45 115 0 0 49 18 38 13 16 28.8 15 186 -22 47 32 18 51 17 28 47 27 15 51 23 48 -2.43 116 0 0 49 58 16 13 17 32.3 14 187 -23 48 9 50 52 0 6 48 4 42 52 6 37 -2.41 117 0 0 50 39 39 13 18 32.7 13 188 -23 48 48 56 52 44 50 48 43 43 52 51 34 -2.39 118 0 0 51 22 47 13 19 29.8 13 190 -23 49 29 35 53 31 41 49 24 15 53 38 39 -2.38 119 0 0 52 7 41 13 20 23.3 12 191 -23 50 11 44 54 20 44 50 6 18 54 27 58 -2.37 120 0 0 52 54 19 13 21 13.2 11 192 -23 50 55 23 55 12 5 50 49 49 55 19 38 -2.36 121 0 0 53 42 44 13 21 59.2 10 193 -23 51 40 30 56 5 52 51 34 48 56 13 47 -2.35 122 0 0 54 32 57 13 22 41.3 9 194 -22 52 27 4 57 2 17 52 21 14 57 10 37 -2.35 123 0 0 55 25 3 13 23 19.1 8 195 -22 53 15 4 58 1 36 53 9 5 58 10 27 -2.36 124 0 0 56 19 5 13 23 52.7 7 196 -22 54 4 31 59 4 12 53 58 21 59 13 42 -2.37 125 0 0 57 15 11 13 24 21.7 6 197 -22 54 55 26 60 10 41 54 49 4 60 21 0 -2.39 126 0 0 58 13 32 13 24 45.9 5 198 -21 55 47 49 61 21 57 55 41 13 61 33 21 -2.43 127 0 0 59 14 20 13 25 5.2 4 199 -21 56 41 43 62 39 28 56 34 53 62 52 27 -2.50 128 0 0 60 17 56 13 25 19.1 2 200 -20 57 37 13 .. .. .. 57 30 6 .. .. .. -2.65 129 0 0 61 24 50 13 25 27.3 1 201 -19 58 34 24 .. .. .. 58 26 58 .. .. .. -3.13 130 0 0 .. .. .... .. .. .. .. .. .. 59 33 25 .. .. .. 59 25 37 .. .. .. .... 131 0 0 .. .. .... .. .. .. .. .. .. 60 34 26 .. .. .. 60 26 12 .. .. .. .... 132 0 0 .. .. .... .. .. .. .. .. .. 61 37 44 .. .. .. 61 28 59 .. .. .. .... Uncertainty in time = +/- 16 secs Prediction of 2023 Jul 15.5 Data for the target star ------------------------ * name: UCAC4 322-209261 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 37 01.9353 DE: -25 43 55.566 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 37 01.9352 DE: -25 43 55.566 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (40) Harmonia asteroid class: approx. diameter [km]: 114 approx. diameter ["]: 0.109 distance from Earth [AU]: 1.44200 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#135 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): 0.020", 0.002", 84.656° remarks: * orbital elements for (40)Harmonia : Mean anomaly = 313.9222023400 deg Arg. of pericenter = 269.3327272858 deg Long. of node = 94.1561849472 deg Inclination = 4.2558733599 deg Eccentricity = 0.0460966213 Semimajor axis = 2.2671588531 AU Perihelion dist = 2.1626504901 AU Mag: H = 7.29, G = 0.15 Epoch of elements : MJD 60560.54031571 TDT (2024 Sep 07.5403) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1352023Apr24,85.48,2024,9,7,12.967685,-0.152716,0.923633,0.740408,0.122342,0.004229,0.000947,0.000001,0.000000 113.0263,-25.6775,-15.05,5.75,False UCAC4 322-209261,19.61720426,-25.7321015,12.56,11.84,11.45,0.0,0,,19.64254373,-25.6775124,0.37,0.35,0,0,0 40,Harmonia,10.84,113.646,1.4420,0,0,0.335,0.75,,5.8,0 0,313.7662,2024,9,7,269.3327,94.1562,4.2559,0.04610,2.26716,2.16265,7.29,5.0,0.15 1.025,0.0200,0.0023,85,0.0027,Known errors,0.94,0,-1,-1 20240907_209261,60140.55 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org