IOTA/IOTA-ES occultation update for (266) Aline / TYC 6764-00370-1 event on 2023 Mar 03, 01:37 UT Visible from Europe Summary ------- On 2023 Mar 03 UT, the 109 km diameter asteroid (266) Aline will occult a 10.2 mag star in the constellation Libra 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 4.42 mag to 14.55 mag (the magnitude of the asteroid) for at most 14.630 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: 2023 Mar 03, 01:30 - 2023 Mar 03, 01:42 * geocentric midpoint of event [JD]: 2460006.56730013 * magnitude of target star: 10.15 * magnitude drop [mag]: 4.42 * estimated maximum duration [s]: 14.630 * Moon: 82 % sunlit, 126° distance * Sun: 104° distance * rough path description: Europe The occultation path -------------------- * approximate projected width [km]: 298 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 86°) * approx speed of asteroid's shadow [km/s]: 7.4507 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6764-00370-1 by 266 Aline on 2023 Mar 3 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 7 0 0 .. .. .... .. .. .. .. .. .. 58 29 17 .. .. .. 58 20 0 .. .. .. .... 8 0 0 .. .. .... .. .. .. .. .. .. 57 51 41 .. .. .. 57 42 36 .. .. .. .... 9 0 0 59 15 59 1 31 47.4 0 142 -33 57 14 52 .. .. .. 57 5 58 .. .. .. .... 10 0 0 58 37 7 1 31 47.7 1 143 -34 56 38 50 .. .. .. 56 30 7 .. .. .. -1.07 11 0 0 57 59 15 1 31 48.5 2 144 -34 56 3 35 60 12 58 55 55 2 .. .. .. -1.73 12 0 0 57 22 20 1 31 49.7 3 145 -34 55 29 8 59 32 17 55 20 44 59 43 29 -1.97 13 0 0 56 46 23 1 31 51.5 3 146 -34 54 55 28 58 52 52 54 47 13 59 3 43 -2.11 14 0 0 56 11 22 1 31 53.7 4 146 -34 54 22 35 58 14 41 54 14 29 58 25 13 -2.19 15 0 0 55 37 17 1 31 56.3 5 147 -34 53 50 30 57 37 40 53 42 33 57 47 55 -2.25 16 0 0 55 4 7 1 31 59.4 6 148 -34 53 19 14 57 1 49 53 11 24 57 11 47 -2.29 17 0 0 54 31 53 1 32 2.9 7 149 -34 52 48 45 56 27 4 52 41 2 56 36 48 -2.32 18 0 0 54 0 33 1 32 6.8 7 150 -34 52 19 5 55 53 26 52 11 28 56 2 56 -2.35 19 0 0 53 30 7 1 32 11.2 8 151 -34 51 50 13 55 20 51 51 42 43 55 30 9 -2.37 20 0 0 53 0 36 1 32 15.9 9 152 -34 51 22 10 54 49 19 51 14 46 54 58 26 -2.39 21 0 0 52 31 59 1 32 21.0 10 152 -34 50 54 56 54 18 50 50 47 38 54 27 46 -2.40 22 0 0 52 4 16 1 32 26.5 10 153 -33 50 28 31 53 49 22 50 21 18 53 58 8 -2.41 23 0 0 51 37 27 1 32 32.3 11 154 -33 50 2 56 53 20 55 49 55 48 53 29 32 -2.43 24 0 0 51 11 31 1 32 38.5 12 155 -33 49 38 11 52 53 28 49 31 8 53 1 57 -2.44 25 0 0 50 46 30 1 32 45.0 12 156 -32 49 14 15 52 27 1 49 7 16 52 35 22 -2.45 26 0 0 50 22 22 1 32 51.9 13 157 -32 48 51 9 52 1 33 48 44 15 52 9 47 -2.46 27 0 0 49 59 8 1 32 59.1 13 158 -32 48 28 54 51 37 4 48 22 4 51 45 11 -2.47 28 0 0 49 36 49 1 33 6.6 14 159 -31 48 7 29 51 13 34 48 0 43 51 21 34 -2.47 29 0 0 49 15 23 1 33 14.4 15 160 -31 47 46 55 50 51 2 47 40 12 50 58 56 -2.48 30 0 0 48 54 51 1 33 22.4 15 160 -31 47 27 12 50 29 29 47 20 33 50 37 17 -2.49 31 0 0 48 35 13 1 33 30.7 16 161 -30 47 8 20 50 8 53 47 1 44 50 16 36 -2.50 32 0 0 48 16 29 1 33 39.3 16 162 -30 46 50 19 49 49 15 46 43 46 49 56 53 -2.50 33 0 0 47 58 39 1 33 48.1 17 163 -29 46 33 10 49 30 35 46 26 40 49 38 9 -2.51 34 0 0 47 41 44 1 33 57.2 17 164 -29 46 16 52 49 12 52 46 10 24 49 20 22 -2.52 35 0 0 47 25 42 1 34 6.5 18 165 -28 46 1 26 48 56 7 45 55 1 49 3 33 -2.52 36 0 0 47 10 35 1 34 16.0 18 166 -27 45 46 52 48 40 19 45 40 29 48 47 41 -2.53 37 0 0 46 56 22 1 34 25.6 18 167 -27 45 33 9 48 25 28 45 26 49 48 32 47 -2.53 38 0 0 46 43 4 1 34 35.5 19 168 -26 45 20 19 48 11 35 45 14 0 48 18 50 -2.54 39 0 0 46 30 39 1 34 45.5 19 169 -26 45 8 21 47 58 39 45 2 4 48 5 51 -2.54 40 0 0 46 19 9 1 34 55.7 19 170 -25 44 57 15 47 46 39 44 51 0 47 53 50 -2.55 41 0 0 46 8 34 1 35 6.0 20 171 -24 44 47 1 47 35 37 44 40 47 47 42 45 -2.55 42 0 0 45 58 53 1 35 16.5 20 172 -24 44 37 40 47 25 32 44 31 28 47 32 38 -2.55 43 0 0 45 50 7 1 35 27.1 20 173 -23 44 29 11 47 16 24 44 23 1 47 23 28 -2.56 44 0 0 45 42 15 1 35 37.7 20 174 -22 44 21 36 47 8 13 44 15 26 47 15 15 -2.56 45 0 0 45 35 18 1 35 48.5 21 175 -22 44 14 53 47 0 59 44 8 44 47 7 59 -2.57 46 0 0 45 29 15 1 35 59.3 21 176 -21 44 9 2 46 54 41 44 2 55 47 1 41 -2.57 47 0 0 45 24 7 1 36 10.2 21 177 -20 44 4 5 46 49 21 43 57 58 46 56 19 -2.57 48 0 0 45 19 54 1 36 21.2 21 178 -20 44 0 0 46 44 57 43 53 54 46 51 55 -2.57 49 0 0 45 16 35 1 36 32.2 21 179 -19 43 56 48 46 41 31 43 50 42 46 48 27 -2.58 50 0 0 45 14 11 1 36 43.2 21 180 -18 43 54 29 46 39 1 43 48 23 46 45 57 -2.58 51 0 0 45 12 42 1 36 54.2 21 181 -17 43 53 2 46 37 27 43 46 57 46 44 23 -2.58 52 0 0 45 12 7 1 37 5.3 21 182 -17 43 52 29 46 36 51 43 46 24 46 43 47 -2.58 53 0 0 45 12 27 1 37 16.3 21 183 -16 43 52 48 46 37 11 43 46 43 46 44 7 -2.58 54 0 0 45 13 41 1 37 27.3 21 184 -15 43 54 0 46 38 29 43 47 55 46 45 25 -2.59 55 0 0 45 15 50 1 37 38.2 21 185 -15 43 56 5 46 40 43 43 50 0 46 47 39 -2.59 56 0 0 45 18 54 1 37 49.1 21 186 -14 43 59 3 46 43 53 43 52 57 46 50 50 -2.59 57 0 0 45 22 52 1 37 59.9 21 187 -13 44 2 54 46 48 1 43 56 47 46 54 59 -2.59 58 0 0 45 27 45 1 38 10.7 20 188 -12 44 7 37 46 53 5 44 1 30 47 0 4 -2.59 59 0 0 45 33 32 1 38 21.4 20 189 -12 44 13 13 46 59 6 44 7 5 47 6 6 -2.59 60 0 0 45 40 14 1 38 31.9 20 190 -11 44 19 41 47 6 4 44 13 32 47 13 5 -2.59 61 0 0 45 47 50 1 38 42.3 20 191 -10 44 27 2 47 13 58 44 20 52 47 21 1 -2.59 62 0 0 45 56 21 1 38 52.6 20 192 -9 44 35 16 47 22 50 44 29 5 47 29 54 -2.59 63 0 0 46 5 45 1 39 2.8 19 193 -9 44 44 22 47 32 38 44 38 9 47 39 44 -2.59 64 0 0 46 16 5 1 39 12.8 19 194 -8 44 54 20 47 43 22 44 48 6 47 50 31 -2.59 65 0 0 46 27 18 1 39 22.6 18 195 -7 45 5 10 47 55 4 44 58 54 48 2 15 -2.59 66 0 0 46 39 25 1 39 32.3 18 196 -7 45 16 53 48 7 42 45 10 35 48 14 56 -2.59 67 0 0 46 52 27 1 39 41.8 18 197 -6 45 29 27 48 21 17 45 23 7 48 28 34 -2.59 68 0 0 47 6 22 1 39 51.0 17 198 -5 45 42 53 48 35 49 45 36 31 48 43 9 -2.59 69 0 0 47 21 12 1 40 0.1 17 199 -4 45 57 11 48 51 18 45 50 47 48 58 42 -2.58 70 0 0 47 36 56 1 40 8.9 16 200 -4 46 12 20 49 7 44 46 5 54 49 15 11 -2.58 71 0 0 47 53 33 1 40 17.4 16 201 -3 46 28 21 49 25 6 46 21 52 49 32 38 -2.58 72 0 0 48 11 4 1 40 25.8 15 202 -2 46 45 13 49 43 26 46 38 41 49 51 3 -2.58 73 0 0 48 29 29 1 40 33.8 15 203 -2 47 2 56 50 2 43 46 56 22 50 10 24 -2.58 74 0 0 48 48 47 1 40 41.6 14 204 -1 47 21 30 50 22 58 47 14 52 50 30 44 -2.58 75 0 0 49 8 59 1 40 49.1 14 205 -1 47 40 55 50 44 10 47 34 14 50 52 2 -2.58 76 0 0 49 30 5 1 40 56.3 13 206 0 48 1 10 51 6 20 47 54 26 51 14 17 -2.58 77 0 0 49 52 4 1 41 3.1 12 206 1 48 22 16 51 29 27 48 15 27 51 37 31 -2.58 78 0 0 50 14 57 1 41 9.7 12 207 1 48 44 11 51 53 33 48 37 19 52 1 43 -2.58 79 0 0 50 38 43 1 41 15.9 11 208 2 49 6 57 52 18 37 49 0 1 52 26 54 -2.58 80 0 0 51 3 22 1 41 21.8 10 209 2 49 30 33 52 44 39 49 23 32 52 53 4 -2.59 81 0 0 51 28 55 1 41 27.3 10 210 3 49 54 58 53 11 41 49 47 52 53 20 14 -2.59 82 0 0 51 55 21 1 41 32.5 9 211 3 50 20 12 53 39 42 50 13 2 53 48 24 -2.59 83 0 0 52 22 41 1 41 37.2 8 212 4 50 46 15 54 8 43 50 39 0 54 17 34 -2.60 84 0 0 52 50 54 1 41 41.6 8 212 4 51 13 7 54 38 45 51 5 46 54 47 46 -2.60 85 0 0 53 20 1 1 41 45.6 7 213 5 51 40 48 55 9 48 51 33 21 55 19 0 -2.61 86 0 0 53 50 1 1 41 49.2 6 214 5 52 9 18 55 41 53 52 1 44 55 51 18 -2.62 87 0 0 54 20 55 1 41 52.4 5 215 5 52 38 35 56 15 2 52 30 55 56 24 39 -2.63 88 0 0 54 52 43 1 41 55.2 5 216 6 53 8 40 56 49 15 53 0 54 56 59 7 -2.65 89 0 0 55 25 26 1 41 57.5 4 217 6 53 39 33 57 24 34 53 31 39 57 34 41 -2.67 90 0 0 55 59 4 1 41 59.3 3 217 6 54 11 14 58 1 0 54 3 12 58 11 24 -2.71 91 0 0 56 33 36 1 42 0.8 2 218 7 54 43 42 58 38 36 54 35 32 58 49 18 -2.79 92 0 0 57 9 5 1 42 1.7 1 219 7 55 16 58 .. .. .. 55 8 39 .. .. .. -2.94 93 0 0 57 45 30 1 42 2.2 1 220 7 55 51 0 .. .. .. 55 42 32 .. .. .. -3.57 94 0 0 .. .. .... .. .. .. .. .. .. 56 25 50 .. .. .. 56 17 12 .. .. .. .... 95 0 0 .. .. .... .. .. .. .. .. .. 57 1 26 .. .. .. 56 52 38 .. .. .. .... Uncertainty in time = +/- 4 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: TYC 6764-00370-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 36 51.2840 DE: -23 40 46.319 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 36 51.2841 DE: -23 40 46.319 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (266) Aline asteroid class: approx. diameter [km]: 109 approx. diameter ["]: 0.053 distance from Earth [AU]: 2.83440 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#123 date of fit: 2023 Feb 07 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): 0.014", 0.002", 85.893° remarks: * orbital elements for (266)Aline : Mean anomaly = 196.2350151112 deg Arg. of pericenter = 151.8743287644 deg Long. of node = 235.8121870537 deg Inclination = 13.4012401597 deg Eccentricity = 0.1543080834 Semimajor axis = 2.8059419491 AU Perihelion dist = 2.3729624248 AU Mag: H = 8.81, G = 0.15 Epoch of elements : MJD 60006.06736111 TDT (2023 Mar 03.0674) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1232023Feb07,14.63,2023,3,3,1.615203,0.015975,0.930518,4.204786,-0.072279,-0.005564,0.001432,0.000000,0.000000 49.7470,-23.7557,158.79,-6.98,False TYC 6764-00370-1,15.61424554,-23.6795329,0.00,10.15,0.00,0.0,0,,15.63699245,-23.7557155,4.42,0.00,0,0,0 266,Aline,14.55,109.0,2.8344,0,0,0.951,-0.23,,5.8,0 0,196.0112,2023,3,2,151.8743,235.8122,13.4012,0.15431,2.80594,2.37296,8.83,5.0,0.15 1.039,0.0143,0.0017,86,0.0021,Known errors,-1.00,-1,-1,-1 20230303_0370-1,59990.86 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org