IOTA/IOTA-ES occultation update for (2721) Vsekhsvyatskij / UCAC4 357-073392 event on 2024 Jul 01, 13:48 UT Visible from Summary ------- On 2024 Jul 01 UT, the 17.994 km diameter asteroid (2721) Vsekhsvyatskij will occult a 11.5 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.39 mag to 17.89 mag (the magnitude of the asteroid) for at most 2.540 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: 98 * date and approx. time of event: 2024 Jul 01, 13:41 - 2024 Jul 01, 13:54 * geocentric midpoint of event [JD]: 2460493.07509213 * magnitude of target star: 11.50 * magnitude drop [mag]: 6.39 * estimated maximum duration [s]: 2.540 * Moon: 22 % sunlit, 166° distance * Sun: 137° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 5.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.001", 106°) * approx speed of asteroid's shadow [km/s]: 7.0801 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 357-073392 by 2721 Vsekhsvyatskij on 2024 Jul 1 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 64 0 0 65 9 50 13 54 2.3 0 140 20 .. .. .. 64 50 25 .. .. .. 64 36 17 .... 65 0 0 64 39 40 13 54 2.2 1 141 20 64 59 13 64 20 31 65 13 58 64 6 34 -0.64 66 0 0 64 9 40 13 54 1.8 1 142 19 64 28 57 63 50 46 64 43 30 63 37 0 -1.51 67 0 0 63 39 52 13 54 1.1 2 143 18 63 58 53 63 21 13 64 13 13 63 7 36 -1.80 68 0 0 63 10 15 13 54 0.0 3 143 18 63 29 1 62 51 51 63 43 9 62 38 25 -1.95 69 0 0 62 40 53 13 53 58.7 3 144 17 62 59 23 62 22 43 63 13 20 62 9 27 -2.04 70 0 0 62 11 46 13 53 57.1 4 145 17 62 30 1 61 53 50 62 43 46 61 40 44 -2.10 71 0 0 61 42 55 13 53 55.1 5 146 16 62 0 56 61 25 12 62 14 30 61 12 16 -2.14 72 0 0 61 14 21 13 53 52.8 5 147 16 61 32 8 60 56 52 61 45 31 60 44 5 -2.17 73 0 0 60 46 6 13 53 50.2 6 148 15 61 3 39 60 28 49 61 16 51 60 16 12 -2.19 74 0 0 60 18 10 13 53 47.3 7 149 14 60 35 30 60 1 6 60 48 31 59 48 38 -2.21 75 0 0 59 50 34 13 53 44.1 7 150 14 60 7 41 59 33 43 60 20 33 59 21 23 -2.23 76 0 0 59 23 19 13 53 40.6 8 150 13 59 40 14 59 6 40 59 52 56 58 54 29 -2.24 77 0 0 58 56 27 13 53 36.8 9 151 12 59 13 9 58 40 0 59 25 42 58 27 57 -2.25 78 0 0 58 29 57 13 53 32.7 9 152 12 58 46 28 58 13 41 58 58 51 58 1 47 -2.26 79 0 0 58 3 51 13 53 28.3 10 153 11 58 20 10 57 47 46 58 32 25 57 36 0 -2.27 80 0 0 57 38 10 13 53 23.7 10 154 10 57 54 17 57 22 15 58 6 24 57 10 36 -2.28 81 0 0 57 12 53 13 53 18.7 11 155 10 57 28 50 56 57 9 57 40 48 56 45 37 -2.28 82 0 0 56 48 1 13 53 13.4 12 156 9 57 3 48 56 32 27 57 15 38 56 21 3 -2.29 83 0 0 56 23 36 13 53 7.9 12 157 8 56 39 13 56 8 12 56 50 55 55 56 54 -2.29 84 0 0 55 59 38 13 53 2.1 13 158 8 56 15 5 55 44 23 56 26 39 55 33 12 -2.30 85 0 0 55 36 6 13 52 56.1 13 158 7 55 51 24 55 21 0 56 2 51 55 9 56 -2.30 86 0 0 55 13 3 13 52 49.8 14 159 6 55 28 11 54 58 5 55 39 32 54 47 8 -2.30 87 0 0 54 50 27 13 52 43.3 14 160 6 55 5 27 54 35 38 55 16 40 54 24 46 -2.31 88 0 0 54 28 20 13 52 36.5 15 161 5 54 43 11 54 13 39 54 54 18 54 2 53 -2.31 89 0 0 54 6 41 13 52 29.5 16 162 4 54 21 24 53 52 9 54 32 25 53 41 29 -2.31 90 0 0 53 45 32 13 52 22.2 16 163 4 54 0 7 53 31 7 54 11 3 53 20 33 -2.31 91 0 0 53 24 53 13 52 14.8 17 164 3 53 39 21 53 10 35 53 50 10 53 0 6 -2.31 92 0 0 53 4 44 13 52 7.1 17 165 2 53 19 4 52 50 33 53 29 47 52 40 8 -2.31 93 0 0 52 45 4 13 51 59.2 17 166 2 52 59 17 52 31 0 53 9 56 52 20 41 -2.32 94 0 0 52 25 55 13 51 51.1 18 167 1 52 40 1 52 11 58 52 50 35 52 1 43 -2.32 95 0 0 52 7 17 13 51 42.9 18 168 0 52 21 17 51 53 26 52 31 45 51 43 16 -2.32 96 0 0 51 49 10 13 51 34.4 19 168 0 52 3 3 51 35 25 52 13 27 51 25 19 -2.32 97 0 0 51 31 34 13 51 25.8 19 169 -1 51 45 21 51 17 55 51 55 40 51 7 53 -2.32 98 0 0 51 14 29 13 51 17.1 20 170 -1 51 28 11 51 0 55 51 38 25 50 50 58 -2.32 99 0 0 50 57 56 13 51 8.1 20 171 -2 51 11 32 50 44 28 51 21 42 50 34 34 -2.32 100 0 0 50 41 55 13 50 59.1 20 172 -3 50 55 25 50 28 32 51 5 32 50 18 42 -2.32 101 0 0 50 26 25 13 50 49.8 21 173 -3 50 39 51 50 13 7 50 49 54 50 3 21 -2.32 102 0 0 50 11 28 13 50 40.5 21 174 -4 50 24 49 49 58 15 50 34 48 49 48 31 -2.32 103 0 0 49 57 3 13 50 31.0 21 175 -5 50 10 19 49 43 54 50 20 15 49 34 14 -2.32 104 0 0 49 43 10 13 50 21.4 21 176 -5 49 56 22 49 30 6 50 6 14 49 20 29 -2.32 105 0 0 49 29 50 13 50 11.8 22 177 -6 49 42 58 49 16 50 49 52 47 49 7 16 -2.32 106 0 0 49 17 3 13 50 2.0 22 178 -6 49 30 7 49 4 6 49 39 53 48 54 35 -2.32 107 0 0 49 4 48 13 49 52.1 22 179 -7 49 17 48 48 51 55 49 27 31 48 42 27 -2.32 108 0 0 48 53 6 13 49 42.1 22 180 -8 49 6 3 48 40 16 49 15 43 48 30 51 -2.32 109 0 0 48 41 57 13 49 32.1 23 181 -8 48 54 50 48 29 11 49 4 28 48 19 47 -2.32 110 0 0 48 31 21 13 49 22.0 23 182 -9 48 44 11 48 18 38 48 53 47 48 9 17 -2.32 111 0 0 48 21 18 13 49 11.9 23 183 -9 48 34 6 48 8 38 48 43 39 47 59 19 -2.32 112 0 0 48 11 49 13 49 1.7 23 184 -10 48 24 33 47 59 11 48 34 4 47 49 54 -2.32 113 0 0 48 2 53 13 48 51.5 23 185 -10 48 15 35 47 50 18 48 25 3 47 41 2 -2.32 114 0 0 47 54 30 13 48 41.2 23 186 -11 48 7 9 47 41 57 48 16 36 47 32 44 -2.32 115 0 0 47 46 41 13 48 30.9 23 187 -11 47 59 18 47 34 10 48 8 43 47 24 58 -2.32 116 0 0 47 39 25 13 48 20.6 23 188 -12 47 52 0 47 26 57 48 1 24 47 17 46 -2.32 117 0 0 47 32 43 13 48 10.3 23 189 -12 47 45 16 47 20 16 47 54 38 47 11 7 -2.32 118 0 0 47 26 34 13 48 0.0 23 190 -13 47 39 6 47 14 9 47 48 27 47 5 1 -2.32 119 0 0 47 21 0 13 47 49.7 23 191 -13 47 33 29 47 8 36 47 42 49 46 59 29 -2.32 120 0 0 47 15 59 13 47 39.4 23 192 -13 47 28 27 47 3 36 47 37 46 46 54 30 -2.32 121 0 0 47 11 32 13 47 29.1 23 193 -14 47 23 59 46 59 11 47 33 17 46 50 5 -2.32 122 0 0 47 7 39 13 47 18.9 23 194 -14 47 20 5 46 55 19 47 29 22 46 46 14 -2.32 123 0 0 47 4 19 13 47 8.7 23 195 -15 47 16 45 46 52 0 47 26 1 46 42 56 -2.33 124 0 0 47 1 34 13 46 58.6 23 196 -15 47 13 59 46 49 16 47 23 15 46 40 12 -2.33 125 0 0 46 59 23 13 46 48.5 23 197 -15 47 11 48 46 47 5 47 21 3 46 38 2 -2.33 126 0 0 46 57 46 13 46 38.5 23 198 -16 47 10 10 46 45 29 47 19 26 46 36 26 -2.33 127 0 0 46 56 44 13 46 28.6 22 199 -16 47 9 7 46 44 26 47 18 23 46 35 23 -2.33 128 0 0 46 56 15 13 46 18.7 22 200 -16 47 8 39 46 43 57 47 17 54 46 34 55 -2.33 129 0 0 46 56 21 13 46 8.9 22 201 -16 47 8 45 46 44 3 47 18 0 46 35 0 -2.33 130 0 0 46 57 1 13 45 59.2 22 202 -17 47 9 25 46 44 43 47 18 41 46 35 39 -2.33 131 0 0 46 58 15 13 45 49.7 21 202 -17 47 10 40 46 45 56 47 19 56 46 36 53 -2.34 132 0 0 47 0 4 13 45 40.2 21 203 -17 47 12 29 46 47 45 47 21 46 46 38 41 -2.34 133 0 0 47 2 27 13 45 30.9 21 204 -17 47 14 53 46 50 7 47 24 10 46 41 2 -2.34 134 0 0 47 5 24 13 45 21.7 20 205 -18 47 17 52 46 53 3 47 27 9 46 43 58 -2.34 135 0 0 47 8 56 13 45 12.6 20 206 -18 47 21 25 46 56 34 47 30 43 46 47 28 -2.34 136 0 0 47 13 3 13 45 3.6 20 207 -18 47 25 32 47 0 39 47 34 52 46 51 32 -2.34 137 0 0 47 17 43 13 44 54.8 19 208 -18 47 30 15 47 5 18 47 39 36 46 56 10 -2.35 138 0 0 47 22 59 13 44 46.2 19 209 -18 47 35 32 47 10 32 47 44 54 47 1 23 -2.35 139 0 0 47 28 49 13 44 37.7 19 210 -18 47 41 24 47 16 21 47 50 48 47 7 10 -2.35 140 0 0 47 35 14 13 44 29.4 18 211 -18 47 47 51 47 22 44 47 57 16 47 13 31 -2.35 141 0 0 47 42 13 13 44 21.3 18 212 -18 47 54 53 47 29 41 48 4 20 47 20 27 -2.36 142 0 0 47 49 47 13 44 13.4 17 212 -18 48 2 29 47 37 12 48 11 58 47 27 57 -2.36 143 0 0 47 57 56 13 44 5.6 17 213 -18 48 10 40 47 45 18 48 20 11 47 36 1 -2.36 144 0 0 48 6 39 13 43 58.1 16 214 -18 48 19 26 47 53 58 48 28 59 47 44 39 -2.36 145 0 0 48 15 56 13 43 50.8 16 215 -18 48 28 47 48 3 13 48 38 22 47 53 52 -2.37 146 0 0 48 25 49 13 43 43.6 15 216 -18 48 38 42 48 13 2 48 48 20 48 3 39 -2.37 147 0 0 48 36 16 13 43 36.7 15 217 -18 48 49 12 48 23 26 48 58 52 48 14 0 -2.37 148 0 0 48 47 17 13 43 30.1 14 217 -18 49 0 17 48 34 24 49 10 0 48 24 55 -2.38 149 0 0 48 58 53 13 43 23.6 14 218 -18 49 11 57 48 45 56 49 21 43 48 36 25 -2.38 150 0 0 49 11 3 13 43 17.4 13 219 -18 49 24 11 48 58 2 49 34 0 48 48 28 -2.38 151 0 0 49 23 48 13 43 11.5 13 220 -18 49 37 0 49 10 43 49 46 52 49 1 6 -2.39 152 0 0 49 37 7 13 43 5.8 12 221 -17 49 50 24 49 23 58 50 0 19 49 14 17 -2.39 153 0 0 49 51 0 13 43 0.3 11 222 -17 50 4 22 49 37 46 50 14 21 49 28 3 -2.40 154 0 0 50 5 28 13 42 55.1 11 222 -17 50 18 54 49 52 9 50 28 57 49 42 22 -2.40 155 0 0 50 20 29 13 42 50.2 10 223 -17 50 34 1 50 7 6 50 44 7 49 57 15 -2.40 156 0 0 50 36 5 13 42 45.6 10 224 -17 50 49 42 50 22 36 50 59 53 50 12 42 -2.41 157 0 0 50 52 15 13 42 41.3 9 225 -16 51 5 57 50 38 41 51 16 12 50 28 43 -2.41 158 0 0 51 8 59 13 42 37.2 8 226 -16 51 22 47 50 55 19 51 33 6 50 45 17 -2.42 159 0 0 51 26 17 13 42 33.4 8 226 -16 51 40 11 51 12 31 51 50 35 51 2 25 -2.42 160 0 0 51 44 8 13 42 30.0 7 227 -15 51 58 8 51 30 16 52 8 37 51 20 5 -2.43 161 0 0 52 2 32 13 42 26.8 6 228 -15 52 16 39 51 48 33 52 27 13 51 38 18 -2.44 162 0 0 52 21 29 13 42 24.0 6 229 -15 52 35 43 52 7 23 52 46 22 51 57 3 -2.45 163 0 0 52 40 58 13 42 21.4 5 230 -14 52 55 20 52 26 46 53 6 4 52 16 21 -2.47 164 0 0 53 1 0 13 42 19.2 4 230 -14 53 15 29 52 46 41 53 26 19 52 36 10 -2.48 165 0 0 53 21 35 13 42 17.3 4 231 -13 53 36 11 53 7 8 53 47 8 52 56 32 -2.50 166 0 0 53 42 42 13 42 15.7 3 232 -13 53 57 26 53 28 7 54 8 29 53 17 26 -2.53 167 0 0 54 4 20 13 42 14.4 2 233 -12 54 19 13 53 49 38 54 30 21 53 38 50 -2.57 168 0 0 54 26 30 13 42 13.5 2 234 -12 54 41 31 54 11 39 54 52 46 54 0 46 -2.66 169 0 0 54 49 10 13 42 12.9 1 234 -11 55 4 21 54 34 11 55 15 43 54 23 11 -2.85 170 0 0 55 12 21 13 42 12.6 0 235 -11 55 27 41 54 57 13 55 39 10 54 46 7 -3.87 Uncertainty in time = +/- 6 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 357-073392 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 40 38.9639 DE: -18 45 45.246 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 40 38.9639 DE: -18 45 45.246 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2721) Vsekhsvyatskij asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.62380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.021", 0.001", 105.805° remarks: * orbital elements for (2721)Vsekhsvyatskij : Mean anomaly = 257.6118890936 deg Arg. of pericenter = 284.1809240608 deg Long. of node = 84.7585319808 deg Inclination = 2.2326812204 deg Eccentricity = 0.1686277302 Semimajor axis = 3.2420801717 AU Perihelion dist = 2.6953755510 AU Mag: H = 12.40, G = 0.15 Epoch of elements : MJD 60492.57509224 TDT (2024 Jul 01.5751) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,2.54,2024,7,1,13.802211,0.104056,0.910502,-3.970371,0.453631,0.003725,-0.000923,0.000001,0.000000 108.3777,-18.8427,-26.03,23.05,False UCAC4 357-073392,15.67748998,-18.7625683,12.19,11.50,11.13,0.0,0,,15.70115792,-18.8427467,6.39,6.31,0,0,0 2721,Vsekhsvyatskij,17.89,17.994,2.6238,0,0,-0.937,1.52,,1.6,0 0,257.5148,2024,7,1,284.1809,84.7585,2.2327,0.16863,3.24208,2.69538,12.40,5.0,0.15 1.371,0.0210,0.0010,106,0.0035,Known errors,1.12,0,-1,-1 20240701_073392,60140.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org