IOTA/IOTA-ES occultation update for (305) Gordonia / TYC 6243-00170-1 event on 2023 May 15, 02:45 UT Visible from Europe Summary ------- On 2023 May 15 UT, the 48.5 km diameter asteroid (305) Gordonia will occult a 10.1 mag star in the constellation Ophiuchus for observers along a path across Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.23 mag to 14.35 mag (the magnitude of the asteroid) for at most 4.210 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: 2023 May 15, 02:41 - 2023 May 15, 02:50 * geocentric midpoint of event [JD]: 2460079.61498130 * magnitude of target star: 10.14 * magnitude drop [mag]: 4.23 * estimated maximum duration [s]: 4.210 * Moon: 22 % sunlit, 94° distance * Sun: 150° distance * rough path description: Europe The occultation path -------------------- * approximate projected width [km]: 109 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.003", 92°) * approx speed of asteroid's shadow [km/s]: 11.5206 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6243-00170-1 by 305 Gordonia on 2023 May 15 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 - 52 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 65 51 48 .. .. .. 65 35 28 .... - 51 0 0 66 8 53 2 49 37.0 0 143 -5 .. .. .. 65 20 5 .. .. .. 65 3 55 .... - 50 0 0 65 36 32 2 49 36.9 1 144 -6 66 27 13 64 48 15 .. .. .. 64 32 14 -0.73 - 49 0 0 65 4 6 2 49 36.6 1 145 -6 65 54 11 64 16 19 66 11 54 64 0 28 -1.35 - 48 0 0 64 31 36 2 49 36.2 2 146 -7 65 21 5 63 44 21 65 38 34 63 28 39 -1.58 - 47 0 0 63 59 4 2 49 35.5 3 147 -7 64 47 57 63 12 21 65 5 13 62 56 49 -1.69 - 46 0 0 63 26 33 2 49 34.7 4 147 -8 64 14 50 62 40 21 64 31 53 62 24 59 -1.77 - 45 0 0 62 54 4 2 49 33.7 4 148 -8 63 41 46 62 8 24 63 58 35 61 53 12 -1.82 - 44 0 0 62 21 40 2 49 32.5 5 149 -9 63 8 46 61 36 31 63 25 22 61 21 28 -1.85 - 43 0 0 61 49 21 2 49 31.1 6 150 -10 62 35 52 61 4 43 62 52 15 60 49 50 -1.88 - 42 0 0 61 17 10 2 49 29.5 6 151 -10 62 3 6 60 33 2 62 19 16 60 18 19 -1.90 - 41 0 0 60 45 7 2 49 27.7 7 152 -11 61 30 29 60 1 29 61 46 27 59 46 56 -1.92 - 40 0 0 60 13 15 2 49 25.6 8 153 -11 60 58 4 59 30 7 61 13 48 59 15 43 -1.93 - 39 0 0 59 41 34 2 49 23.4 8 154 -12 60 25 50 58 58 56 60 41 23 58 44 42 -1.94 - 38 0 0 59 10 7 2 49 21.0 9 155 -12 59 53 51 58 27 58 60 9 11 58 13 53 -1.95 - 37 0 0 58 38 54 2 49 18.4 10 155 -13 59 22 6 57 57 14 59 37 15 57 43 18 -1.96 - 36 0 0 58 7 58 2 49 15.6 10 156 -13 58 50 38 57 26 45 59 5 36 57 12 58 -1.97 - 35 0 0 57 37 18 2 49 12.6 11 157 -13 58 19 28 56 56 33 58 34 15 56 42 55 -1.98 - 34 0 0 57 6 57 2 49 9.4 12 158 -14 57 48 37 56 26 38 58 3 13 56 13 9 -1.98 - 33 0 0 56 36 55 2 49 6.1 13 159 -14 57 18 6 55 57 3 57 32 31 55 43 42 -1.99 - 32 0 0 56 7 14 2 49 2.5 13 160 -15 56 47 57 55 27 47 57 2 11 55 14 35 -1.99 - 31 0 0 55 37 54 2 48 58.8 14 161 -15 56 18 9 54 58 53 56 32 14 54 45 48 -2.00 - 30 0 0 55 8 57 2 48 54.8 14 162 -15 55 48 45 54 30 20 56 2 40 54 17 23 -2.00 - 29 0 0 54 40 22 2 48 50.7 15 163 -16 55 19 45 54 2 9 55 33 30 53 49 20 -2.00 - 28 0 0 54 12 12 2 48 46.4 16 164 -16 54 51 10 53 34 23 55 4 45 53 21 41 -2.00 - 27 0 0 53 44 27 2 48 42.0 16 165 -16 54 23 0 53 7 0 54 36 27 52 54 26 -2.01 - 26 0 0 53 17 8 2 48 37.4 17 165 -17 53 55 17 52 40 3 54 8 35 52 27 36 -2.01 - 25 0 0 52 50 15 2 48 32.6 17 166 -17 53 28 1 52 13 31 53 41 10 52 1 11 -2.01 - 24 0 0 52 23 49 2 48 27.7 18 167 -17 53 1 12 51 47 26 53 14 14 51 35 13 -2.01 - 23 0 0 51 57 51 2 48 22.6 19 168 -17 52 34 53 51 21 49 52 47 46 51 9 42 -2.01 - 22 0 0 51 32 22 2 48 17.4 19 169 -17 52 9 2 50 56 38 52 21 48 50 44 38 -2.02 - 21 0 0 51 7 21 2 48 12.0 20 170 -18 51 43 41 50 31 57 51 56 19 50 20 2 -2.02 - 20 0 0 50 42 50 2 48 6.6 20 171 -18 51 18 50 50 7 44 51 31 21 49 55 56 -2.02 - 19 0 0 50 18 49 2 48 0.9 21 172 -18 50 54 30 49 44 1 51 6 54 49 32 18 -2.02 - 18 0 0 49 55 18 2 47 55.2 21 173 -18 50 30 40 49 20 47 50 42 58 49 9 10 -2.02 - 17 0 0 49 32 19 2 47 49.3 22 174 -18 50 7 23 48 58 4 50 19 34 48 46 33 -2.02 - 16 0 0 49 9 50 2 47 43.3 22 175 -18 49 44 37 48 35 52 49 56 43 48 24 26 -2.02 - 15 0 0 48 47 54 2 47 37.3 22 176 -18 49 22 24 48 14 11 49 34 23 48 2 50 -2.02 - 14 0 0 48 26 29 2 47 31.1 23 177 -18 49 0 43 47 53 1 49 12 37 47 41 45 -2.02 - 13 0 0 48 5 37 2 47 24.8 23 178 -18 48 39 36 47 32 24 48 51 24 47 21 12 -2.02 - 12 0 0 47 45 18 2 47 18.4 24 179 -18 48 19 2 47 12 19 48 30 44 47 1 12 -2.02 - 11 0 0 47 25 32 2 47 12.0 24 180 -18 47 59 1 46 52 46 48 10 39 46 41 43 -2.02 - 10 0 0 47 6 19 2 47 5.5 24 181 -18 47 39 35 46 33 46 47 51 8 46 22 48 -2.02 - 9 0 0 46 47 40 2 46 58.8 24 182 -18 47 20 43 46 15 20 47 32 11 46 4 25 -2.02 - 8 0 0 46 29 35 2 46 52.2 25 183 -18 47 2 25 45 57 27 47 13 48 45 46 36 -2.02 - 7 0 0 46 12 5 2 46 45.5 25 184 -18 46 44 42 45 40 7 46 56 1 45 29 20 -2.02 - 6 0 0 45 55 8 2 46 38.7 25 185 -17 46 27 34 45 23 22 46 38 49 45 12 39 -2.03 - 5 0 0 45 38 46 2 46 31.8 25 186 -17 46 11 1 45 7 10 46 22 12 44 56 31 -2.03 - 4 0 0 45 22 59 2 46 25.0 26 187 -17 45 55 3 44 51 33 46 6 10 44 40 57 -2.03 - 3 0 0 45 7 47 2 46 18.0 26 188 -17 45 39 41 44 36 31 45 50 45 44 25 58 -2.03 - 2 0 0 44 53 10 2 46 11.1 26 189 -17 45 24 55 44 22 3 45 35 55 44 11 33 -2.03 - 1 0 0 44 39 9 2 46 4.1 26 190 -16 45 10 44 44 8 10 45 21 41 43 57 43 -2.03 0 0 0 44 25 43 2 45 57.1 26 191 -16 44 57 10 43 54 53 45 8 3 43 44 28 -2.03 1 0 0 44 12 53 2 45 50.1 26 192 -16 44 44 11 43 42 10 44 55 2 43 31 48 -2.03 2 0 0 44 0 38 2 45 43.1 26 193 -15 44 31 49 43 30 3 44 42 37 43 19 44 -2.03 3 0 0 43 49 0 2 45 36.1 26 194 -15 44 20 3 43 18 32 44 30 48 43 8 14 -2.03 4 0 0 43 37 58 2 45 29.1 26 195 -15 44 8 54 43 7 36 44 19 36 42 57 21 -2.03 5 0 0 43 27 32 2 45 22.1 26 196 -14 43 58 21 42 57 16 44 9 2 42 47 3 -2.03 6 0 0 43 17 42 2 45 15.1 26 197 -14 43 48 25 42 47 32 43 59 4 42 37 21 -2.03 7 0 0 43 8 29 2 45 8.1 26 198 -13 43 39 6 42 38 24 43 49 43 42 28 15 -2.03 8 0 0 42 59 52 2 45 1.1 26 199 -13 43 30 24 42 29 53 43 40 59 42 19 45 -2.03 9 0 0 42 51 52 2 44 54.2 26 200 -13 43 22 20 42 21 57 43 32 52 42 11 50 -2.03 10 0 0 42 44 28 2 44 47.3 26 201 -12 43 14 52 42 14 38 43 25 23 42 4 32 -2.03 11 0 0 42 37 42 2 44 40.5 26 202 -12 43 8 1 42 7 55 43 18 31 41 57 51 -2.03 12 0 0 42 31 32 2 44 33.7 25 203 -11 43 1 47 42 1 48 43 12 16 41 51 46 -2.03 13 0 0 42 25 59 2 44 26.9 25 204 -11 42 56 12 41 56 18 43 6 39 41 46 17 -2.03 14 0 0 42 21 3 2 44 20.2 25 205 -10 42 51 13 41 51 25 43 1 40 41 41 24 -2.03 15 0 0 42 16 45 2 44 13.6 25 206 -10 42 46 52 41 47 9 42 57 18 41 37 9 -2.03 16 0 0 42 13 3 2 44 7.0 24 207 -9 42 43 9 41 43 29 42 53 34 41 33 30 -2.04 17 0 0 42 9 59 2 44 0.5 24 208 -9 42 40 3 41 40 27 42 50 27 41 30 28 -2.04 18 0 0 42 7 33 2 43 54.1 24 209 -8 42 37 35 41 38 1 42 47 59 41 28 3 -2.04 19 0 0 42 5 43 2 43 47.7 24 210 -7 42 35 45 41 36 13 42 46 8 41 26 14 -2.04 20 0 0 42 4 31 2 43 41.4 23 211 -7 42 34 32 41 35 1 42 44 55 41 25 3 -2.04 21 0 0 42 3 56 2 43 35.3 23 212 -6 42 33 57 41 34 26 42 44 20 41 24 28 -2.04 22 0 0 42 3 59 2 43 29.2 22 213 -6 42 34 0 41 34 28 42 44 24 41 24 30 -2.04 23 0 0 42 4 39 2 43 23.2 22 214 -5 42 34 42 41 35 8 42 45 5 41 25 9 -2.04 24 0 0 42 5 57 2 43 17.3 22 215 -4 42 36 1 41 36 25 42 46 25 41 26 26 -2.05 25 0 0 42 7 53 2 43 11.5 21 216 -4 42 37 58 41 38 19 42 48 23 41 28 20 -2.05 26 0 0 42 10 26 2 43 5.9 21 216 -3 42 40 34 41 40 51 42 50 59 41 30 51 -2.05 27 0 0 42 13 38 2 43 0.4 20 217 -2 42 43 47 41 44 0 42 54 13 41 33 59 -2.05 28 0 0 42 17 27 2 42 54.9 20 218 -2 42 47 39 41 47 46 42 58 6 41 37 45 -2.05 29 0 0 42 21 54 2 42 49.6 19 219 -1 42 52 9 41 52 10 43 2 37 41 42 7 -2.05 30 0 0 42 26 58 2 42 44.5 19 220 0 42 57 17 41 57 11 43 7 47 41 47 8 -2.06 31 0 0 42 32 41 2 42 39.5 18 221 0 43 3 4 42 2 50 43 13 35 41 52 45 -2.06 32 0 0 42 39 1 2 42 34.6 18 221 1 43 9 28 42 9 6 43 20 1 41 59 0 -2.06 33 0 0 42 45 59 2 42 29.9 17 222 2 43 16 31 42 15 59 43 27 6 42 5 51 -2.06 34 0 0 42 53 35 2 42 25.3 16 223 3 43 24 12 42 23 30 43 34 48 42 13 21 -2.06 35 0 0 43 1 49 2 42 20.8 16 224 3 43 32 32 42 31 39 43 43 10 42 21 27 -2.07 36 0 0 43 10 40 2 42 16.5 15 225 4 43 41 29 42 40 25 43 52 10 42 30 11 -2.07 37 0 0 43 20 9 2 42 12.4 15 225 5 43 51 5 42 49 48 44 1 48 42 39 32 -2.07 38 0 0 43 30 17 2 42 8.5 14 226 5 44 1 19 42 59 48 44 12 5 42 49 31 -2.07 39 0 0 43 41 1 2 42 4.7 13 227 6 44 12 12 43 10 26 44 22 59 43 0 7 -2.08 40 0 0 43 52 24 2 42 1.1 13 228 7 44 23 42 43 21 41 44 34 32 43 11 19 -2.08 41 0 0 44 4 24 2 41 57.6 12 228 8 44 35 50 43 33 33 44 46 44 43 23 8 -2.08 42 0 0 44 17 2 2 41 54.4 11 229 8 44 48 37 43 46 3 44 59 34 43 35 35 -2.09 43 0 0 44 30 18 2 41 51.3 11 230 9 45 2 2 43 59 10 45 13 2 43 48 39 -2.09 44 0 0 44 44 11 2 41 48.4 10 231 10 45 16 5 44 12 54 45 27 9 44 2 20 -2.09 45 0 0 44 58 41 2 41 45.7 9 231 11 45 30 46 44 27 15 45 41 53 44 16 38 -2.10 46 0 0 45 13 49 2 41 43.2 9 232 11 45 46 4 44 42 12 45 57 15 44 31 32 -2.11 47 0 0 45 29 34 2 41 40.9 8 233 12 46 2 0 44 57 47 46 13 15 44 47 3 -2.11 48 0 0 45 45 56 2 41 38.8 7 234 13 46 18 34 45 13 57 46 29 53 45 3 10 -2.12 49 0 0 46 2 54 2 41 36.9 6 234 14 46 35 45 45 30 44 46 47 9 45 19 53 -2.13 50 0 0 46 20 30 2 41 35.2 6 235 14 46 53 33 45 48 7 47 5 2 45 37 13 -2.14 51 0 0 46 38 41 2 41 33.7 5 236 15 47 11 59 46 6 7 47 23 32 45 55 8 -2.15 52 0 0 46 57 30 2 41 32.4 4 237 16 47 31 1 46 24 42 47 42 39 46 13 38 -2.17 53 0 0 47 16 54 2 41 31.3 3 237 16 47 50 40 46 43 52 48 2 23 46 32 45 -2.19 54 0 0 47 36 54 2 41 30.4 3 238 17 48 10 55 47 3 38 48 22 43 46 52 26 -2.23 55 0 0 47 57 30 2 41 29.8 2 239 18 48 31 46 47 23 59 48 43 40 47 12 42 -2.30 56 0 0 48 18 40 2 41 29.4 1 240 19 48 53 13 47 44 55 49 5 13 47 33 32 -2.45 57 0 0 48 40 26 2 41 29.1 0 240 19 49 15 16 48 6 25 49 27 22 47 54 57 -3.08 58 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 48 16 56 .... Uncertainty in time = +/- 4 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 6243-00170-1 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 32 23.8440 DE: -18 50 26.780 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 32 23.8444 DE: -18 50 26.779 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (305) Gordonia asteroid class: approx. diameter [km]: 49 approx. diameter ["]: 0.025 distance from Earth [AU]: 2.64770 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#74 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", 0.003", 91.862° remarks: * orbital elements for (305)Gordonia : Mean anomaly = 133.5689683059 deg Arg. of pericenter = 260.5940989088 deg Long. of node = 207.4604901789 deg Inclination = 4.4508780687 deg Eccentricity = 0.1964112744 Semimajor axis = 3.0893262797 AU Perihelion dist = 2.4825477681 AU Mag: H = 8.88, G = 0.15 Epoch of elements : MJD 60079.11486111 TDT (2023 May 15.1149) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#742023Apr24,4.21,2023,5,15,2.759551,0.172174,0.878373,-6.379171,1.260670,-0.002908,-0.000253,0.000001,0.000000 -10.5272,-18.8584,137.70,18.78,False TYC 6243-00170-1,17.53995667,-18.8407721,0.00,10.14,0.00,0.0,4,,17.56299157,-18.8584271,4.23,0.00,0,0,0 305,Gordonia,14.35,48.5,2.6477,0,0,-1.493,4.19,,2.6,0 0,133.5481,2023,5,15,260.5941,207.4605,4.4509,0.19641,3.08933,2.48255,8.91,5.0,0.15 1.171,0.0210,0.0027,92,0.0043,Known errors,-1.00,-1,-1,-1 20230515_0170-1,60063.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org