IOTA/IOTA-ES occultation update for (2012) Guo / TYC 6304-01694-1 event on 2024 Oct 02, 03:08 UT Visible from Summary ------- On 2024 Oct 02 UT, the 11.9723842973586 km diameter asteroid (2012) Guo will occult a 10.4 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 6.78 mag to 17.15 mag (the magnitude of the asteroid) for at most 0.760 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: 99 * date and approx. time of event: 2024 Oct 02, 03:01 - 2024 Oct 02, 03:14 * geocentric midpoint of event [JD]: 2460585.63079438 * magnitude of target star: 10.37 * magnitude drop [mag]: 6.78 * estimated maximum duration [s]: 0.760 * Moon: 0 % sunlit, 105° distance * Sun: 99° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.003", 78°) * approx speed of asteroid's shadow [km/s]: 15.9562 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6304-01694-1 by 2012 Guo on 2024 Oct 2 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 147 0 0 10 6 40 3 2 2.6 1 110 70 10 3 0 10 10 21 10 0 38 10 12 43 .... 148 0 0 9 45 13 3 2 2.8 2 110 69 9 41 32 9 48 53 9 39 11 9 51 15 -0.14 149 0 0 9 23 57 3 2 3.1 3 110 68 9 20 17 9 27 37 9 17 55 9 29 58 -0.22 150 0 0 9 2 52 3 2 3.5 4 111 68 8 59 13 9 6 32 8 56 51 9 8 54 -0.25 151 0 0 8 42 0 3 2 4.0 5 111 67 8 38 21 8 45 40 8 36 0 8 48 1 -0.27 152 0 0 8 21 21 3 2 4.8 6 111 67 8 17 42 8 25 1 8 15 21 8 27 22 -0.28 153 0 0 8 0 56 3 2 5.6 7 111 66 7 57 17 8 4 35 7 54 56 8 6 56 -0.29 154 0 0 7 40 44 3 2 6.6 8 111 65 7 37 5 7 44 22 7 34 44 7 46 43 -0.30 155 0 0 7 20 46 3 2 7.7 9 111 64 7 17 8 7 24 24 7 14 47 7 26 45 -0.30 156 0 0 7 1 3 3 2 9.0 10 111 64 6 57 25 7 4 41 6 55 5 7 7 2 -0.30 157 0 0 6 41 35 3 2 10.4 11 112 63 6 37 57 6 45 13 6 35 37 6 47 33 -0.31 158 0 0 6 22 23 3 2 11.9 12 112 62 6 18 45 6 26 1 6 16 25 6 28 21 -0.31 159 0 0 6 3 27 3 2 13.6 13 112 61 5 59 49 6 7 4 5 57 30 6 9 24 -0.31 160 0 0 5 44 47 3 2 15.4 14 112 60 5 41 10 5 48 24 5 38 50 5 50 44 -0.31 161 0 0 5 26 24 3 2 17.4 15 112 59 5 22 47 5 30 1 5 20 28 5 32 20 -0.32 162 0 0 5 8 18 3 2 19.5 16 112 59 5 4 42 5 11 54 5 2 22 5 14 14 -0.32 163 0 0 4 50 30 3 2 21.7 17 112 58 4 46 53 4 54 6 4 44 35 4 56 25 -0.32 164 0 0 4 32 59 3 2 24.1 18 112 57 4 29 23 4 36 35 4 27 5 4 38 54 -0.32 165 0 0 4 15 47 3 2 26.6 19 113 56 4 12 12 4 19 23 4 9 53 4 21 42 -0.32 166 0 0 3 58 54 3 2 29.2 20 113 55 3 55 19 4 2 29 3 53 0 4 4 48 -0.32 167 0 0 3 42 20 3 2 32.0 21 113 54 3 38 45 3 45 55 3 36 26 3 48 13 -0.32 168 0 0 3 26 5 3 2 34.8 22 113 53 3 22 30 3 29 39 3 20 12 3 31 58 -0.32 169 0 0 3 10 9 3 2 37.9 24 113 52 3 6 35 3 13 44 3 4 17 3 16 2 -0.33 170 0 0 2 54 34 3 2 41.0 25 113 51 2 51 0 2 58 8 2 48 42 3 0 26 -0.33 171 0 0 2 39 19 3 2 44.2 26 113 50 2 35 45 2 42 52 2 33 27 2 45 10 -0.33 172 0 0 2 24 24 3 2 47.6 27 113 49 2 20 50 2 27 58 2 18 33 2 30 15 -0.33 173 0 0 2 9 50 3 2 51.1 28 114 48 2 6 17 2 13 23 2 4 0 2 15 41 -0.33 174 0 0 1 55 37 3 2 54.8 29 114 47 1 52 4 1 59 10 1 49 47 2 1 28 -0.33 175 0 0 1 41 46 3 2 58.5 30 114 46 1 38 13 1 45 19 1 35 56 1 47 36 -0.33 176 0 0 1 28 16 3 3 2.4 31 114 45 1 24 44 1 31 49 1 22 27 1 34 6 -0.33 177 0 0 1 15 8 3 3 6.3 32 114 44 1 11 36 1 18 41 1 9 19 1 20 57 -0.33 178 0 0 1 2 22 3 3 10.4 33 114 43 0 58 50 1 5 54 0 56 34 1 8 11 -0.33 179 0 0 0 49 59 3 3 14.6 34 114 42 0 46 27 0 53 30 0 44 11 0 55 47 -0.33 -180 0 0 0 37 57 3 3 18.9 35 115 41 0 34 26 0 41 29 0 32 10 0 43 45 -0.33 -179 0 0 0 26 19 3 3 23.3 36 115 40 0 22 48 0 29 50 0 20 32 0 32 6 -0.33 -178 0 0 0 15 3 3 3 27.8 37 115 39 0 11 32 0 18 35 0 9 17 0 20 50 -0.33 -177 0 0 0 4 11 3 3 32.5 38 115 38 0 0 40 0 7 42 - 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0 16 55 - 0 9 54 - 0 19 11 - 0 7 38 -0.34 -126 0 0 - 0 3 6 3 8 59.9 70 188 -14 - 0 6 37 0 0 26 - 0 8 52 0 2 41 -0.34 -125 0 0 0 7 38 3 9 7.1 70 191 -15 0 4 6 0 11 9 0 1 51 0 13 25 -0.34 -124 0 0 0 18 45 3 9 14.4 69 194 -16 0 15 13 0 22 16 0 12 57 0 24 33 -0.34 -123 0 0 0 30 16 3 9 21.6 69 196 -17 0 26 44 0 33 48 0 24 28 0 36 4 -0.34 -122 0 0 0 42 10 3 9 28.8 68 198 -18 0 38 38 0 45 42 0 36 22 0 47 59 -0.34 -121 0 0 0 54 28 3 9 36.0 68 201 -19 0 50 56 0 58 1 0 48 40 1 0 17 -0.34 -120 0 0 1 7 10 3 9 43.2 67 203 -20 1 3 37 1 10 42 1 1 21 1 12 59 -0.34 -119 0 0 1 20 14 3 9 50.3 67 205 -21 1 16 41 1 23 47 1 14 24 1 26 4 -0.34 -118 0 0 1 33 41 3 9 57.4 66 207 -22 1 30 8 1 37 14 1 27 51 1 39 31 -0.34 -117 0 0 1 47 31 3 10 4.5 65 209 -23 1 43 58 1 51 4 1 41 40 1 53 22 -0.34 -116 0 0 2 1 43 3 10 11.6 65 210 -24 1 58 10 2 5 17 1 55 52 2 7 34 -0.34 -115 0 0 2 16 17 3 10 18.6 64 212 -25 2 12 44 2 19 51 2 10 26 2 22 9 -0.34 -114 0 0 2 31 14 3 10 25.6 63 213 -26 2 27 39 2 34 48 2 25 22 2 37 6 -0.34 -113 0 0 2 46 31 3 10 32.5 62 215 -27 2 42 57 2 50 6 2 40 39 2 52 24 -0.34 -112 0 0 3 2 10 3 10 39.4 62 216 -28 2 58 36 3 5 45 2 56 18 3 8 4 -0.34 -111 0 0 3 18 11 3 10 46.3 61 218 -29 3 14 36 3 21 46 3 12 17 3 24 4 -0.34 -110 0 0 3 34 32 3 10 53.1 60 219 -31 3 30 56 3 38 7 3 28 38 3 40 26 -0.34 -109 0 0 3 51 13 3 10 59.9 59 220 -32 3 47 37 3 54 49 3 45 19 3 57 7 -0.34 -108 0 0 4 8 14 3 11 6.6 58 221 -33 4 4 38 4 11 50 4 2 20 4 14 9 -0.34 -107 0 0 4 25 36 3 11 13.2 57 222 -34 4 21 59 4 29 12 4 19 40 4 31 31 -0.34 -106 0 0 4 43 16 3 11 19.8 56 223 -35 4 39 40 4 46 53 4 37 20 4 49 12 -0.34 -105 0 0 5 1 16 3 11 26.3 55 224 -36 4 57 39 5 4 53 4 55 20 5 7 12 -0.34 -104 0 0 5 19 34 3 11 32.7 55 225 -37 5 15 57 5 23 12 5 13 37 5 25 31 -0.34 -103 0 0 5 38 11 3 11 39.1 54 225 -38 5 34 33 5 41 48 5 32 14 5 44 8 -0.34 -102 0 0 5 57 5 3 11 45.4 53 226 -39 5 53 28 6 0 43 5 51 8 6 3 3 -0.34 -101 0 0 6 16 17 3 11 51.6 52 227 -40 6 12 39 6 19 56 6 10 19 6 22 16 -0.34 -100 0 0 6 35 46 3 11 57.8 51 227 -41 6 32 8 6 39 25 6 29 48 6 41 45 -0.34 - 99 0 0 6 55 32 3 12 3.8 50 228 -42 6 51 53 6 59 11 6 49 33 7 1 32 -0.34 - 98 0 0 7 15 34 3 12 9.8 49 229 -43 7 11 55 7 19 13 7 9 34 7 21 34 -0.34 - 97 0 0 7 35 51 3 12 15.7 48 229 -44 7 32 12 7 39 31 7 29 51 7 41 52 -0.34 - 96 0 0 7 56 24 3 12 21.5 47 230 -45 7 52 44 8 0 4 7 50 23 8 2 25 -0.34 - 95 0 0 8 17 11 3 12 27.2 46 230 -46 8 13 31 8 20 51 8 11 10 8 23 13 -0.34 - 94 0 0 8 38 13 3 12 32.8 45 231 -47 8 34 33 8 41 53 8 32 11 8 44 15 -0.34 - 93 0 0 8 59 28 3 12 38.3 44 231 -48 8 55 48 9 3 9 8 53 26 9 5 31 -0.34 - 92 0 0 9 20 57 3 12 43.8 43 232 -49 9 17 16 9 24 37 9 14 54 9 26 59 -0.34 - 91 0 0 9 42 38 3 12 49.1 42 232 -50 9 38 57 9 46 19 9 36 35 9 48 41 -0.34 - 90 0 0 10 4 31 3 12 54.3 41 233 -51 10 0 50 10 8 13 9 58 28 10 10 35 -0.34 - 89 0 0 10 26 36 3 12 59.4 40 233 -52 10 22 55 10 30 18 10 20 32 10 32 40 -0.34 - 88 0 0 10 48 52 3 13 4.3 39 234 -53 10 45 10 10 52 34 10 42 48 10 54 57 -0.34 - 87 0 0 11 11 19 3 13 9.2 38 234 -54 11 7 37 11 15 0 11 5 14 11 17 23 -0.34 - 86 0 0 11 33 55 3 13 14.0 37 235 -54 11 30 13 11 37 37 11 27 50 11 40 0 -0.34 - 85 0 0 11 56 40 3 13 18.6 36 235 -55 11 52 58 12 0 23 11 50 35 12 2 46 -0.34 - 84 0 0 12 19 35 3 13 23.1 35 235 -56 12 15 52 12 23 17 12 13 29 12 25 40 -0.34 - 83 0 0 12 42 37 3 13 27.5 34 236 -57 12 38 54 12 46 20 12 36 31 12 48 43 -0.34 - 82 0 0 13 5 47 3 13 31.8 32 236 -58 13 2 4 13 9 30 12 59 41 13 11 53 -0.34 - 81 0 0 13 29 4 3 13 35.9 31 237 -59 13 25 21 13 32 47 13 22 57 13 35 11 -0.34 - 80 0 0 13 52 27 3 13 39.9 30 237 -60 13 48 44 13 56 10 13 46 20 13 58 34 -0.34 - 79 0 0 14 15 56 3 13 43.8 29 237 -61 14 12 12 14 19 39 14 9 49 14 22 3 -0.34 - 78 0 0 14 39 30 3 13 47.6 28 238 -61 14 35 46 14 43 13 14 33 23 14 45 37 -0.33 - 77 0 0 15 3 8 3 13 51.2 27 238 -62 14 59 25 15 6 52 14 57 1 15 9 16 -0.33 - 76 0 0 15 26 50 3 13 54.7 26 238 -63 15 23 7 15 30 34 15 20 43 15 32 58 -0.33 - 75 0 0 15 50 36 3 13 58.1 25 239 -64 15 46 52 15 54 20 15 44 28 15 56 44 -0.33 - 74 0 0 16 14 24 3 14 1.3 24 239 -64 16 10 40 16 18 8 16 8 16 16 20 32 -0.33 - 73 0 0 16 38 14 3 14 4.4 23 239 -65 16 34 30 16 41 58 16 32 6 16 44 23 -0.33 - 72 0 0 17 2 5 3 14 7.4 22 240 -66 16 58 21 17 5 50 16 55 57 17 8 14 -0.33 - 71 0 0 17 25 58 3 14 10.2 21 240 -66 17 22 13 17 29 42 17 19 49 17 32 6 -0.33 - 70 0 0 17 49 50 3 14 12.9 20 240 -67 17 46 6 17 53 34 17 43 41 17 55 59 -0.33 - 69 0 0 18 13 42 3 14 15.5 19 241 -67 18 9 57 18 17 26 18 7 33 18 19 51 -0.33 - 68 0 0 18 37 33 3 14 17.9 18 241 -68 18 33 48 18 41 17 18 31 24 18 43 42 -0.33 - 67 0 0 19 1 22 3 14 20.2 17 242 -68 18 57 37 19 5 6 18 55 13 19 7 31 -0.33 - 66 0 0 19 25 9 3 14 22.3 16 242 -69 19 21 24 19 28 53 19 19 0 19 31 18 -0.33 - 65 0 0 19 48 52 3 14 24.3 15 242 -69 19 45 8 19 52 37 19 42 44 19 55 1 -0.33 - 64 0 0 20 12 33 3 14 26.2 14 243 -69 20 8 49 20 16 17 20 6 24 20 18 42 -0.33 - 63 0 0 20 36 9 3 14 27.9 13 243 -70 20 32 25 20 39 54 20 30 1 20 42 18 -0.33 - 62 0 0 20 59 41 3 14 29.5 12 243 -70 20 55 57 21 3 26 20 53 33 21 5 50 -0.33 - 61 0 0 21 23 8 3 14 31.0 11 244 -70 21 19 24 21 26 53 21 17 0 21 29 17 -0.34 - 60 0 0 21 46 29 3 14 32.3 10 244 -70 21 42 45 21 50 14 21 40 21 21 52 38 -0.34 - 59 0 0 22 9 44 3 14 33.5 9 245 -70 22 6 0 22 13 28 22 3 36 22 15 53 -0.34 - 58 0 0 22 32 52 3 14 34.6 8 245 -70 22 29 8 22 36 37 22 26 44 22 39 1 -0.34 - 57 0 0 22 55 53 3 14 35.5 7 245 -70 22 52 9 22 59 37 22 49 45 23 2 2 -0.34 - 56 0 0 23 18 47 3 14 36.3 6 246 -70 23 15 3 23 22 31 23 12 39 23 24 55 -0.34 - 55 0 0 23 41 32 3 14 37.0 5 246 -70 23 37 48 23 45 15 23 35 24 23 47 39 -0.34 - 54 0 0 24 4 8 3 14 37.5 4 247 -70 24 0 24 24 7 52 23 58 0 24 10 16 -0.34 - 53 0 0 24 26 35 3 14 37.9 3 247 -69 24 22 51 24 30 18 24 20 27 24 32 42 -0.34 - 52 0 0 24 48 52 3 14 38.2 2 247 -69 24 45 9 24 52 36 24 42 45 24 55 0 -0.35 - 51 0 0 25 10 59 3 14 38.4 1 248 -69 25 7 16 25 14 43 25 4 53 25 17 7 -0.36 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6304-01694-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 17 04.7375 DE: -19 43 00.048 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 17 04.7374 DE: -19 43 00.048 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * B mag [mag]: 11.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2012) Guo asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.011 distance from Earth [AU]: 1.48380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.023", 0.003", 78.481° remarks: * orbital elements for (2012)Guo : Mean anomaly = 3.8360172129 deg Arg. of pericenter = 36.6040589482 deg Long. of node = 277.0546877188 deg Inclination = 2.9056323850 deg Eccentricity = 0.1780100847 Semimajor axis = 2.3287838241 AU Perihelion dist = 1.9142368182 AU Mag: H = 13.55, G = 0.15 Epoch of elements : MJD 60585.13079421 TDT (2024 Oct 02.1308) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.76,2024,10,2,3.139065,-0.045755,0.321551,8.916566,1.266878,0.005080,0.000649,0.000000,0.000000 -128.7861,-19.6731,130.24,-3.73,False TYC 6304-01694-1,19.28464933,-19.7166798,11.00,10.37,10.03,0.1,0,,19.30892011,-19.6730681,6.78,6.67,0,0,0 2012,Guo,17.15,12.080,1.4838,0,0,3.742,7.51,,0.8,0 0,3.7997,2024,10,2,36.6041,277.0547,2.9056,0.17801,2.32878,1.91424,13.55,5.0,0.15 1.322,0.0230,0.0033,78,0.0036,Known errors,1.01,0,-1,-1 20241002_1694-1,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org