IOTA/IOTA-ES occultation update for (19) Fortuna / HIP 81844 event on 2023 Apr 12, 06:36 UT Visible from SE Canada Summary ------- On 2023 Apr 12 UT, the 201.052139012687 km diameter asteroid (19) Fortuna will occult a 8.6 mag star in the constellation Ophiuchus for observers along a path across SE Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.51 mag to 12.07 mag (the magnitude of the asteroid) for at most 80.120 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 Apr 12, 06:10 - 2023 Apr 12, 07:03 * geocentric midpoint of event [JD]: 2460046.77557742 * magnitude of target star: 8.60 * magnitude drop [mag]: 3.51 * estimated maximum duration [s]: 80.120 * Moon: 63 % sunlit, 25° distance * Sun: 130° distance * rough path description: SE Canada The occultation path -------------------- * approximate projected width [km]: 350 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 4.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.001", 97°) * approx speed of asteroid's shadow [km/s]: 2.5119 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 81844 by 19 Fortuna on 2023 Apr 12 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 - 86 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 65 13 35 .. .. .. 65 6 4 .... - 85 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 64 28 13 .. .. .. 64 20 48 .... - 84 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 63 42 19 .. .. .. 63 34 59 .... - 83 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 62 55 58 .. .. .. 62 48 42 .... - 82 0 0 65 34 43 7 0 53.5 1 154 -14 .. .. .. 62 9 13 .. .. .. 62 2 3 .... - 81 0 0 64 44 30 7 0 52.3 2 155 -15 .. .. .. 61 22 9 .. .. .. 61 15 5 -0.91 - 80 0 0 63 53 58 7 0 49.8 3 156 -15 .. .. .. 60 34 51 .. .. .. 60 27 52 -1.15 - 79 0 0 63 3 13 7 0 46.1 3 157 -16 .. .. .. 59 47 22 .. .. .. 59 40 30 -1.26 - 78 0 0 62 12 20 7 0 41.2 4 158 -16 66 6 9 58 59 48 66 16 18 58 53 1 -1.33 - 77 0 0 61 21 24 7 0 34.9 5 159 -17 65 9 33 58 12 11 65 19 24 58 5 31 -1.37 - 76 0 0 60 30 30 7 0 27.4 6 160 -17 64 13 7 57 24 36 64 22 40 57 18 2 -1.40 - 75 0 0 59 39 43 7 0 18.6 7 160 -18 63 16 55 56 37 5 63 26 11 56 30 37 -1.43 - 74 0 0 58 49 6 7 0 8.5 8 161 -18 62 21 2 55 49 43 62 30 2 55 43 21 -1.45 - 73 0 0 57 58 43 6 59 57.2 9 162 -19 61 25 33 55 2 31 61 34 17 54 56 15 -1.46 - 72 0 0 57 8 37 6 59 44.6 10 163 -19 60 30 33 54 15 33 60 39 2 54 9 23 -1.47 - 71 0 0 56 18 51 6 59 30.8 11 164 -19 59 36 3 53 28 52 59 44 18 53 22 48 -1.48 - 70 0 0 55 29 28 6 59 15.8 12 165 -20 58 42 7 52 42 29 58 50 8 52 36 31 -1.49 - 69 0 0 54 40 31 6 58 59.6 13 166 -20 57 48 46 51 56 27 57 56 35 51 50 34 -1.50 - 68 0 0 53 52 1 6 58 42.2 14 166 -20 56 56 4 51 10 48 57 3 40 51 5 0 -1.50 - 67 0 0 53 4 0 6 58 23.8 15 167 -21 56 4 1 50 25 33 56 11 26 50 19 51 -1.50 - 66 0 0 52 16 30 6 58 4.2 16 168 -21 55 12 40 49 40 44 55 19 54 49 35 7 -1.51 - 65 0 0 51 29 33 6 57 43.7 17 169 -21 54 22 1 48 56 22 54 29 4 48 50 51 -1.51 - 64 0 0 50 43 9 6 57 22.0 17 170 -21 53 32 5 48 12 30 53 38 59 48 7 3 -1.51 - 63 0 0 49 57 21 6 56 59.5 18 171 -22 52 42 53 47 29 7 52 49 37 47 23 45 -1.51 - 62 0 0 49 12 8 6 56 35.9 19 171 -22 51 54 26 46 46 15 52 1 2 46 40 58 -1.52 - 61 0 0 48 27 31 6 56 11.5 20 172 -22 51 6 45 46 3 55 51 13 11 45 58 42 -1.52 - 60 0 0 47 43 33 6 55 46.2 21 173 -22 50 19 48 45 22 8 50 26 7 45 16 59 -1.52 - 59 0 0 47 0 12 6 55 20.1 22 174 -22 49 33 38 44 40 54 49 39 49 44 35 50 -1.51 - 58 0 0 46 17 30 6 54 53.2 22 175 -22 48 48 13 44 0 14 48 54 17 43 55 14 -1.51 - 57 0 0 45 35 26 6 54 25.5 23 176 -22 48 3 35 43 20 9 48 9 31 43 15 13 -1.51 - 56 0 0 44 54 2 6 53 57.1 24 177 -22 47 19 42 42 40 39 47 25 33 42 35 46 -1.51 - 55 0 0 44 13 18 6 53 28.0 24 177 -22 46 36 36 42 1 44 46 42 20 41 56 55 -1.51 - 54 0 0 43 33 14 6 52 58.3 25 178 -22 45 54 16 41 23 25 45 59 54 41 18 40 -1.51 - 53 0 0 42 53 49 6 52 28.0 26 179 -21 45 12 42 40 45 42 45 18 14 40 41 1 -1.50 - 52 0 0 42 15 5 6 51 57.0 27 180 -21 44 31 53 40 8 36 44 37 20 40 3 57 -1.50 - 51 0 0 41 37 1 6 51 25.6 27 181 -21 43 51 50 39 32 6 43 57 12 39 27 31 -1.50 - 50 0 0 40 59 38 6 50 53.6 28 182 -21 43 12 33 38 56 13 43 17 49 38 51 41 -1.50 - 49 0 0 40 22 54 6 50 21.1 28 183 -21 42 34 0 38 20 57 42 39 12 38 16 28 -1.49 - 48 0 0 39 46 51 6 49 48.2 29 184 -20 41 56 13 37 46 18 42 1 21 37 41 52 -1.49 - 47 0 0 39 11 29 6 49 14.8 29 185 -20 41 19 11 37 12 16 41 24 14 37 7 53 -1.49 - 46 0 0 38 36 46 6 48 41.1 30 186 -20 40 42 52 36 38 52 40 47 52 36 34 31 -1.48 - 45 0 0 38 2 44 6 48 7.0 30 187 -20 40 7 18 36 6 4 40 12 14 36 1 46 -1.48 - 44 0 0 37 29 22 6 47 32.6 31 188 -19 39 32 28 35 33 55 39 37 20 35 29 39 -1.48 - 43 0 0 36 56 40 6 46 57.8 31 189 -19 38 58 22 35 2 22 39 3 10 34 58 9 -1.47 - 42 0 0 36 24 38 6 46 22.8 32 190 -19 38 24 59 34 31 27 38 29 44 34 27 16 -1.47 - 41 0 0 35 53 16 6 45 47.5 32 191 -18 37 52 20 34 1 9 37 57 1 33 57 0 -1.47 - 40 0 0 35 22 34 6 45 12.0 33 192 -18 37 20 23 33 31 28 37 25 1 33 27 21 -1.46 - 39 0 0 34 52 31 6 44 36.3 33 193 -17 36 49 10 33 2 25 36 53 45 32 58 20 -1.46 - 38 0 0 34 23 8 6 44 0.4 33 194 -17 36 18 38 32 33 59 36 23 11 32 29 56 -1.46 - 37 0 0 33 54 24 6 43 24.3 33 195 -16 35 48 49 32 6 10 35 53 19 32 2 10 -1.46 - 36 0 0 33 26 20 6 42 48.1 34 196 -16 35 19 43 31 38 59 35 24 10 31 35 0 -1.45 - 35 0 0 32 58 55 6 42 11.9 34 197 -15 34 51 18 31 12 25 34 55 42 31 8 28 -1.45 - 34 0 0 32 32 10 6 41 35.5 34 198 -15 34 23 35 30 46 28 34 27 57 30 42 32 -1.45 - 33 0 0 32 6 3 6 40 59.0 34 199 -14 33 56 33 30 21 8 34 0 53 30 17 14 -1.44 - 32 0 0 31 40 35 6 40 22.5 35 200 -14 33 30 13 29 56 25 33 34 30 29 52 33 -1.44 - 31 0 0 31 15 46 6 39 46.0 35 201 -13 33 4 33 29 32 19 33 8 49 29 28 28 -1.44 - 30 0 0 30 51 36 6 39 9.5 35 202 -13 32 39 35 29 8 50 32 43 49 29 5 1 -1.43 - 29 0 0 30 28 5 6 38 32.9 35 203 -12 32 15 18 28 45 58 32 19 29 28 42 10 -1.43 - 28 0 0 30 5 12 6 37 56.4 35 204 -12 31 51 41 28 23 43 31 55 50 28 19 57 -1.43 - 27 0 0 29 42 58 6 37 20.0 35 205 -11 31 28 45 28 2 5 31 32 53 27 58 20 -1.43 - 26 0 0 29 21 22 6 36 43.6 35 206 -10 31 6 29 27 41 4 31 10 35 27 37 20 -1.43 - 25 0 0 29 0 25 6 36 7.3 35 207 -10 30 44 53 27 20 39 30 48 58 27 16 57 -1.42 - 24 0 0 28 40 6 6 35 31.2 35 208 -9 30 23 57 27 0 52 30 28 1 26 57 10 -1.42 - 23 0 0 28 20 25 6 34 55.1 35 209 -8 30 3 42 26 41 41 30 7 44 26 38 1 -1.42 - 22 0 0 28 1 22 6 34 19.2 35 209 -8 29 44 6 26 23 7 29 48 7 26 19 28 -1.42 - 21 0 0 27 42 58 6 33 43.4 35 210 -7 29 25 11 26 5 10 29 29 10 26 1 32 -1.42 - 20 0 0 27 25 12 6 33 7.8 35 211 -7 29 6 55 25 47 50 29 10 53 25 44 12 -1.42 - 19 0 0 27 8 4 6 32 32.4 34 212 -6 28 49 19 25 31 7 28 53 16 25 27 30 -1.41 - 18 0 0 26 51 34 6 31 57.2 34 213 -5 28 32 23 25 15 0 28 36 18 25 11 24 -1.41 - 17 0 0 26 35 43 6 31 22.2 34 214 -4 28 16 6 24 59 31 28 20 1 24 55 56 -1.41 - 16 0 0 26 20 30 6 30 47.4 34 215 -4 28 0 29 24 44 38 28 4 23 24 41 4 -1.41 - 15 0 0 26 5 56 6 30 12.9 34 216 -3 27 45 33 24 30 23 27 49 26 24 26 49 -1.41 - 14 0 0 25 51 59 6 29 38.6 33 217 -2 27 31 16 24 16 45 27 35 8 24 13 11 -1.41 - 13 0 0 25 38 41 6 29 4.7 33 218 -2 27 17 39 24 3 44 27 21 30 24 0 11 -1.41 - 12 0 0 25 26 2 6 28 31.0 33 219 -1 27 4 41 23 51 20 27 8 32 23 47 48 -1.41 - 11 0 0 25 14 1 6 27 57.6 32 219 0 26 52 24 23 39 33 26 56 14 23 36 2 -1.41 - 10 0 0 25 2 38 6 27 24.5 32 220 1 26 40 47 23 28 24 26 44 36 23 24 53 -1.41 - 9 0 0 24 51 55 6 26 51.8 32 221 1 26 29 49 23 17 53 26 33 38 23 14 22 -1.41 - 8 0 0 24 41 50 6 26 19.4 31 222 2 26 19 32 23 7 59 26 23 20 23 4 29 -1.41 - 7 0 0 24 32 24 6 25 47.4 31 223 3 26 9 56 22 58 43 26 13 43 22 55 13 -1.41 - 6 0 0 24 23 38 6 25 15.8 30 223 4 26 0 59 22 50 5 26 4 47 22 46 35 -1.41 - 5 0 0 24 15 30 6 24 44.6 30 224 4 25 52 43 22 42 5 25 56 30 22 38 35 -1.42 - 4 0 0 24 8 2 6 24 13.7 29 225 5 25 45 8 22 34 43 25 48 55 22 31 14 -1.42 - 3 0 0 24 1 14 6 23 43.3 29 225 6 25 38 14 22 27 59 25 42 1 22 24 31 -1.42 - 2 0 0 23 55 5 6 23 13.4 28 226 7 25 32 1 22 21 54 25 35 47 22 18 26 -1.42 - 1 0 0 23 49 36 6 22 43.8 28 227 7 25 26 29 22 16 28 25 30 16 22 13 0 -1.42 0 0 0 23 44 48 6 22 14.8 27 228 8 25 21 39 22 11 41 25 25 25 22 8 13 -1.42 1 0 0 23 40 39 6 21 46.2 27 228 9 25 17 31 22 7 33 25 21 17 22 4 5 -1.43 2 0 0 23 37 12 6 21 18.2 26 229 10 25 14 4 22 4 5 25 17 50 22 0 36 -1.43 3 0 0 23 34 25 6 20 50.6 26 229 11 25 11 20 22 1 16 25 15 6 21 57 48 -1.43 4 0 0 23 32 20 6 20 23.6 25 230 11 25 9 18 21 59 8 25 13 4 21 55 39 -1.44 5 0 0 23 30 56 6 19 57.1 25 231 12 25 7 59 21 57 40 25 11 46 21 54 11 -1.44 6 0 0 23 30 14 6 19 31.1 24 231 13 25 7 23 21 56 52 25 11 10 21 53 23 -1.44 7 0 0 23 30 14 6 19 5.8 23 232 14 25 7 31 21 56 45 25 11 19 21 53 16 -1.44 8 0 0 23 30 57 6 18 41.0 23 232 15 25 8 23 21 57 20 25 12 11 21 53 50 -1.45 9 0 0 23 32 23 6 18 16.9 22 233 16 25 10 0 21 58 36 25 13 48 21 55 6 -1.45 10 0 0 23 34 32 6 17 53.3 21 234 16 25 12 21 22 0 34 25 16 9 21 57 3 -1.46 11 0 0 23 37 24 6 17 30.4 21 234 17 25 15 27 22 3 14 25 19 16 21 59 43 -1.46 12 0 0 23 41 1 6 17 8.2 20 235 18 25 19 19 22 6 37 25 23 9 22 3 6 -1.47 13 0 0 23 45 22 6 16 46.6 19 235 19 25 23 58 22 10 44 25 27 48 22 7 12 -1.47 14 0 0 23 50 28 6 16 25.8 18 236 20 25 29 22 22 15 33 25 33 13 22 12 1 -1.47 15 0 0 23 56 20 6 16 5.6 18 236 21 25 35 34 22 21 7 25 39 26 22 17 34 -1.48 16 0 0 24 2 57 6 15 46.2 17 237 21 25 42 34 22 27 25 25 46 26 22 23 52 -1.49 17 0 0 24 10 22 6 15 27.6 16 237 22 25 50 22 22 34 29 25 54 15 22 30 54 -1.49 18 0 0 24 18 33 6 15 9.7 15 238 23 25 58 58 22 42 18 26 2 53 22 38 42 -1.50 19 0 0 24 27 32 6 14 52.6 15 238 24 26 8 25 22 50 53 26 12 21 22 47 16 -1.50 20 0 0 24 37 20 6 14 36.4 14 238 25 26 18 42 23 0 14 26 22 39 22 56 37 -1.51 21 0 0 24 47 56 6 14 21.0 13 239 26 26 29 49 23 10 23 26 33 48 23 6 45 -1.52 22 0 0 24 59 22 6 14 6.4 12 239 26 26 41 49 23 21 20 26 45 48 23 17 41 -1.52 23 0 0 25 11 38 6 13 52.7 11 240 27 26 54 40 23 33 5 26 58 41 23 29 25 -1.53 24 0 0 25 24 45 6 13 40.0 10 240 28 27 8 25 23 45 39 27 12 28 23 41 58 -1.54 25 0 0 25 38 44 6 13 28.1 10 241 29 27 23 4 23 59 3 27 27 8 23 55 20 -1.55 26 0 0 25 53 36 6 13 17.3 9 241 30 27 38 38 24 13 17 27 42 44 24 9 33 -1.56 27 0 0 26 9 20 6 13 7.4 8 242 31 27 55 7 24 28 23 27 59 15 24 24 38 -1.57 28 0 0 26 25 59 6 12 58.5 7 242 32 28 12 34 24 44 21 28 16 43 24 40 34 -1.58 29 0 0 26 43 33 6 12 50.7 6 242 32 28 30 57 25 1 11 28 35 9 24 57 23 -1.60 30 0 0 27 2 3 6 12 43.9 5 243 33 28 50 20 25 18 55 28 54 34 25 15 5 -1.62 31 0 0 27 21 29 6 12 38.3 4 243 34 29 10 42 25 37 33 29 14 58 25 33 41 -1.65 32 0 0 27 41 53 6 12 33.7 3 244 35 29 32 5 25 57 6 29 36 24 25 53 12 -1.69 33 0 0 28 3 16 6 12 30.3 2 244 36 29 54 30 26 17 35 29 58 51 26 13 40 -1.76 34 0 0 28 25 38 6 12 28.1 1 245 36 30 17 57 26 39 1 30 22 21 26 35 4 -1.93 35 0 0 28 49 1 6 12 27.1 0 245 37 .. .. .. 27 1 25 .. .. .. 26 57 26 -3.01 36 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 27 24 48 .. .. .. 27 20 46 .... Uncertainty in time = +/- 5 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: HIP 81844 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 43 01.4266 DE: -21 20 40.495 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 43 01.4270 DE: -21 20 40.496 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 8.6 * B mag [mag]: 8.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (19) Fortuna asteroid class: approx. diameter [km]: 201 approx. diameter ["]: 0.136 distance from Earth [AU]: 2.03870 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#150 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): 0.008", 0.001", 97.266° remarks: * orbital elements for (19)Fortuna : Mean anomaly = 210.1883233612 deg Arg. of pericenter = 182.5536250422 deg Long. of node = 211.0348887716 deg Inclination = 1.5734592412 deg Eccentricity = 0.1572492742 Semimajor axis = 2.4426206989 AU Perihelion dist = 2.0585203669 AU Mag: H = 7.42, G = 0.10 Epoch of elements : MJD 60046.27567917 TDT (2023 Apr 12.2757) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1502023Feb07,80.12,2023,4,12,6.613858,0.328601,0.749131,-1.297494,0.571558,-0.004388,0.000515,0.000001,0.000000 -48.3161,-21.3891,81.02,8.61,False HIP 81844,16.71706292,-21.3445820,8.90,8.60,8.44,0.1,0,,16.74016750,-21.3891266,3.52,3.24,0,0,0 19,Fortuna,12.07,201.2,2.0387,0,0,-0.401,2.47,,11.6,0 0,210.1171,2023,4,12,182.5536,211.0349,1.5735,0.15725,2.44262,2.05852,7.43,5.0,0.15 1.019,0.0077,0.0015,97,0.0026,Known errors,-1.00,-1,-1,-1 20230412__81844,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org