IOTA/IOTA-ES occultation update for (196) Philomela / UCAC4-307-168340 event on 2023 Aug 10, 22:15 UT Visible from Europe Summary ------- On 2023 Aug 10 UT, the 140.1 km diameter asteroid (196) Philomela will occult a 12.5 mag star in the constellation Sagittarius 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 0.42 mag to 11.66 mag (the magnitude of the asteroid) for at most 41.120 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: 99 * date and approx. time of event: 2023 Aug 10, 22:00 - 2023 Aug 10, 22:32 * geocentric midpoint of event [JD]: 2460167.42816992 * magnitude of target star: 12.48 * magnitude drop [mag]: 0.42 * estimated maximum duration [s]: 41.120 * Moon: 25 % sunlit, 167° distance * Sun: 133° distance * rough path description: Europe Additional comments ------------------- low mag drop, low altitude The occultation path -------------------- * approximate projected width [km]: 298 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 14.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.030, +/- 0.018) * 1 sigma uncertainty ellipse (major, minor, PA): (0.030", 0.018", 98°) * approx speed of asteroid's shadow [km/s]: 3.4068 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-307-168340 by 196 Philomela on 2023 Aug 10 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 - 80 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 46 48 25 .... - 79 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 46 58 37 .. .. .. 46 8 22 .... - 78 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 46 18 40 .. .. .. 45 29 21 .... - 77 0 0 47 36 11 22 31 6.9 1 137 18 .. .. .. 45 39 47 .. .. .. 44 51 21 .... - 76 0 0 46 56 7 22 31 5.4 2 137 18 49 1 40 45 1 57 .. .. .. 44 14 22 -1.30 - 75 0 0 46 17 12 22 31 2.9 3 138 17 48 19 58 44 25 10 49 18 39 43 38 22 -1.55 - 74 0 0 45 39 26 22 30 59.3 4 139 16 47 39 37 43 49 24 48 36 51 43 3 21 -1.67 - 73 0 0 45 2 48 22 30 54.7 5 139 15 47 0 33 43 14 39 47 56 28 42 29 19 -1.74 - 72 0 0 44 27 16 22 30 49.2 6 140 15 46 22 45 42 40 54 47 17 26 41 56 14 -1.79 - 71 0 0 43 52 50 22 30 42.7 6 141 14 45 46 11 42 8 9 46 39 43 41 24 7 -1.82 - 70 0 0 43 19 28 22 30 35.3 7 142 13 45 10 48 41 36 22 46 3 16 40 52 57 -1.85 - 69 0 0 42 47 8 22 30 27.0 8 142 12 44 36 36 41 5 32 45 28 5 40 22 42 -1.87 - 68 0 0 42 15 51 22 30 17.9 9 143 12 44 3 33 40 35 40 44 54 5 39 53 23 -1.88 - 67 0 0 41 45 34 22 30 8.0 10 144 11 43 31 36 40 6 45 44 21 17 39 24 58 -1.89 - 66 0 0 41 16 18 22 29 57.3 11 144 10 43 0 46 39 38 45 43 49 37 38 57 28 -1.90 - 65 0 0 40 48 1 22 29 45.9 11 145 9 42 31 0 39 11 40 43 19 6 38 30 51 -1.90 - 64 0 0 40 20 41 22 29 33.7 12 146 8 42 2 18 38 45 29 42 49 40 38 5 7 -1.91 - 63 0 0 39 54 19 22 29 20.8 13 146 8 41 34 37 38 20 12 42 21 19 37 40 16 -1.91 - 62 0 0 39 28 54 22 29 7.3 14 147 7 41 7 57 37 55 48 41 54 1 37 16 16 -1.91 - 61 0 0 39 4 24 22 28 53.1 14 148 6 40 42 17 37 32 17 41 27 45 36 53 7 -1.91 - 60 0 0 38 40 49 22 28 38.3 15 148 5 40 17 36 37 9 37 41 2 30 36 30 50 -1.91 - 59 0 0 38 18 9 22 28 22.9 16 149 4 39 53 53 36 47 49 40 38 16 36 9 22 -1.91 - 58 0 0 37 56 22 22 28 6.9 17 150 3 39 31 8 36 26 52 40 15 0 35 48 45 -1.91 - 57 0 0 37 35 28 22 27 50.3 17 151 3 39 9 18 36 6 45 39 52 42 35 28 56 -1.91 - 56 0 0 37 15 26 22 27 33.2 18 151 2 38 48 24 35 47 28 39 31 22 35 9 57 -1.91 - 55 0 0 36 56 16 22 27 15.6 19 152 1 38 28 24 35 29 0 39 10 57 34 51 45 -1.91 - 54 0 0 36 37 57 22 26 57.6 19 153 0 38 9 19 35 11 21 38 51 29 34 34 22 -1.91 - 53 0 0 36 20 29 22 26 39.0 20 153 -1 37 51 7 34 54 30 38 32 54 34 17 46 -1.91 - 52 0 0 36 3 51 22 26 20.1 20 154 -1 37 33 48 34 38 27 38 15 14 34 1 58 -1.91 - 51 0 0 35 48 3 22 26 0.6 21 155 -2 37 17 20 34 23 12 37 58 28 33 46 56 -1.91 - 50 0 0 35 33 3 22 25 40.8 21 156 -3 37 1 45 34 8 44 37 42 34 33 32 40 -1.90 - 49 0 0 35 18 53 22 25 20.6 22 157 -4 36 47 0 33 55 3 37 27 33 33 19 11 -1.90 - 48 0 0 35 5 31 22 25 0.0 22 157 -4 36 33 6 33 42 8 37 13 23 33 6 27 -1.90 - 47 0 0 34 52 56 22 24 39.1 23 158 -5 36 20 2 33 29 59 37 0 4 32 54 29 -1.90 - 46 0 0 34 41 9 22 24 17.9 23 159 -6 36 7 48 33 18 37 36 47 36 32 43 15 -1.90 - 45 0 0 34 30 10 22 23 56.3 24 160 -7 35 56 22 33 7 59 36 35 58 32 32 47 -1.90 - 44 0 0 34 19 57 22 23 34.4 24 160 -8 35 45 46 32 58 7 36 25 10 32 23 3 -1.89 - 43 0 0 34 10 31 22 23 12.2 25 161 -8 35 35 58 32 49 0 36 15 11 32 14 3 -1.89 - 42 0 0 34 1 51 22 22 49.8 25 162 -9 35 26 58 32 40 37 36 6 1 32 5 47 -1.89 - 41 0 0 33 53 57 22 22 27.2 25 163 -10 35 18 46 32 32 59 35 57 40 31 58 16 -1.89 - 40 0 0 33 46 49 22 22 4.2 26 164 -10 35 11 21 32 26 5 35 50 7 31 51 28 -1.89 - 39 0 0 33 40 26 22 21 41.1 26 165 -11 35 4 44 32 19 55 35 43 23 31 45 23 -1.89 - 38 0 0 33 34 49 22 21 17.8 26 165 -12 34 58 53 32 14 29 35 37 26 31 40 2 -1.89 - 37 0 0 33 29 57 22 20 54.3 27 166 -13 34 53 50 32 9 47 35 32 17 31 35 24 -1.89 - 36 0 0 33 25 49 22 20 30.6 27 167 -13 34 49 33 32 5 48 35 27 55 31 31 28 -1.89 - 35 0 0 33 22 27 22 20 6.8 27 168 -14 34 46 2 32 2 33 35 24 20 31 28 16 -1.89 - 34 0 0 33 19 49 22 19 42.8 27 169 -15 34 43 18 32 0 1 35 21 33 31 25 46 -1.89 - 33 0 0 33 17 56 22 19 18.7 27 170 -15 34 41 20 31 58 12 35 19 32 31 23 59 -1.89 - 32 0 0 33 16 48 22 18 54.5 28 171 -16 34 40 8 31 57 7 35 18 19 31 22 55 -1.89 - 31 0 0 33 16 23 22 18 30.2 28 171 -17 34 39 42 31 56 44 35 17 52 31 22 33 -1.89 - 30 0 0 33 16 43 22 18 5.8 28 172 -17 34 40 2 31 57 4 35 18 11 31 22 53 -1.89 - 29 0 0 33 17 48 22 17 41.3 28 173 -18 34 41 7 31 58 8 35 19 17 31 23 56 -1.89 - 28 0 0 33 19 36 22 17 16.8 28 174 -18 34 42 59 31 59 54 35 21 10 31 25 41 -1.89 - 27 0 0 33 22 9 22 16 52.3 28 175 -19 34 45 36 32 2 23 35 23 50 31 28 9 -1.89 - 26 0 0 33 25 27 22 16 27.7 28 176 -20 34 48 59 32 5 35 35 27 16 31 31 19 -1.89 - 25 0 0 33 29 28 22 16 3.1 28 177 -20 34 53 8 32 9 30 35 31 28 31 35 11 -1.89 - 24 0 0 33 34 14 22 15 38.6 28 178 -21 34 58 3 32 14 8 35 36 28 31 39 46 -1.89 - 23 0 0 33 39 44 22 15 14.0 28 179 -21 35 3 44 32 19 29 35 42 14 31 45 3 -1.89 - 22 0 0 33 45 59 22 14 49.5 28 179 -22 35 10 11 32 25 33 35 48 47 31 51 3 -1.90 - 21 0 0 33 52 58 22 14 25.0 28 180 -22 35 17 24 32 32 20 35 56 7 31 57 45 -1.90 - 20 0 0 34 0 42 22 14 0.6 27 181 -23 35 25 24 32 39 50 36 4 14 32 5 10 -1.90 - 19 0 0 34 9 11 22 13 36.3 27 182 -23 35 34 10 32 48 4 36 13 9 32 13 17 -1.90 - 18 0 0 34 18 24 22 13 12.1 27 183 -24 35 43 43 32 57 1 36 22 51 32 22 8 -1.90 - 17 0 0 34 28 23 22 12 48.0 27 184 -24 35 54 2 33 6 42 36 33 21 32 31 41 -1.91 - 16 0 0 34 39 7 22 12 24.0 27 185 -25 36 5 9 33 17 7 36 44 40 32 41 58 -1.91 - 15 0 0 34 50 38 22 12 0.2 26 186 -25 36 17 4 33 28 15 36 56 46 32 52 59 -1.91 - 14 0 0 35 2 53 22 11 36.6 26 187 -26 36 29 46 33 40 8 37 9 42 33 4 42 -1.92 - 13 0 0 35 15 55 22 11 13.1 26 187 -26 36 43 17 33 52 46 37 23 26 33 17 10 -1.92 - 12 0 0 35 29 43 22 10 49.8 25 188 -26 36 57 35 34 6 8 37 38 1 33 30 21 -1.92 - 11 0 0 35 44 18 22 10 26.7 25 189 -27 37 12 43 34 20 14 37 53 25 33 44 17 -1.93 - 10 0 0 35 59 40 22 10 3.9 25 190 -27 37 28 40 34 35 6 38 9 38 33 58 57 -1.93 - 9 0 0 36 15 49 22 9 41.3 24 191 -27 37 45 26 34 50 44 38 26 43 34 14 21 -1.94 - 8 0 0 36 32 46 22 9 18.9 24 192 -27 38 3 2 35 7 6 38 44 39 34 30 30 -1.94 - 7 0 0 36 50 30 22 8 56.9 23 192 -28 38 21 29 35 24 15 39 3 27 34 47 25 -1.94 - 6 0 0 37 9 4 22 8 35.2 23 193 -28 38 40 47 35 42 10 39 23 7 35 5 5 -1.95 - 5 0 0 37 28 26 22 8 13.7 23 194 -28 39 0 56 36 0 52 39 43 41 35 23 31 -1.95 - 4 0 0 37 48 37 22 7 52.7 22 195 -28 39 21 58 36 20 21 40 5 8 35 42 43 -1.96 - 3 0 0 38 9 38 22 7 32.0 21 196 -28 39 43 52 36 40 37 40 27 29 36 2 41 -1.96 - 2 0 0 38 31 29 22 7 11.6 21 196 -29 40 6 40 37 1 40 40 50 45 36 23 26 -1.97 - 1 0 0 38 54 11 22 6 51.7 20 197 -29 40 30 21 37 23 33 41 14 57 36 44 58 -1.97 0 0 0 39 17 45 22 6 32.2 20 198 -29 40 54 58 37 46 13 41 40 6 37 7 18 -1.98 1 0 0 39 42 10 22 6 13.2 19 199 -29 41 20 31 38 9 43 42 6 13 37 30 26 -1.99 2 0 0 40 7 28 22 5 54.6 19 200 -29 41 46 59 38 34 2 42 33 18 37 54 22 -1.99 3 0 0 40 33 39 22 5 36.6 18 200 -29 42 14 25 38 59 11 43 1 22 38 19 7 -2.00 4 0 0 41 0 44 22 5 19.1 17 201 -29 42 42 49 39 25 10 43 30 28 38 44 41 -2.00 5 0 0 41 28 43 22 5 2.1 17 202 -29 43 12 13 39 52 1 44 0 35 39 11 4 -2.01 6 0 0 41 57 38 22 4 45.7 16 203 -29 43 42 36 40 19 43 44 31 45 39 38 18 -2.02 7 0 1 42 27 28 22 4 29.9 15 203 -28 44 14 1 40 48 17 45 3 59 40 6 22 -2.02 8 0 1 42 58 16 22 4 14.7 14 204 -28 44 46 29 41 17 43 45 37 20 40 35 18 -2.03 9 0 1 43 30 1 22 4 0.2 14 205 -28 45 20 1 41 48 2 46 11 48 41 5 4 -2.04 10 0 1 44 2 44 22 3 46.3 13 206 -28 45 54 37 42 19 16 46 47 25 41 35 43 -2.04 11 0 1 44 36 27 22 3 33.2 12 206 -28 46 30 20 42 51 24 47 24 13 42 7 15 -2.05 12 0 1 45 11 11 22 3 20.9 11 207 -27 47 7 12 43 24 26 48 2 14 42 39 39 -2.06 13 0 1 45 46 55 22 3 9.3 10 208 -27 47 45 14 43 58 25 48 41 30 43 12 57 -2.07 14 0 1 46 23 42 22 2 58.5 10 209 -27 48 24 27 44 33 19 49 22 4 43 47 10 -2.07 15 0 1 47 1 33 22 2 48.6 9 209 -26 49 4 54 45 9 10 50 3 58 44 22 16 -2.08 16 0 1 47 40 28 22 2 39.6 8 210 -26 49 46 38 45 45 59 50 47 15 44 58 18 -2.09 17 0 1 48 20 30 22 2 31.5 7 211 -25 50 29 40 46 23 46 51 31 59 45 35 15 -2.11 18 0 1 49 1 39 22 2 24.3 6 212 -25 51 14 3 47 2 32 52 18 14 46 13 9 -2.12 19 0 1 49 43 57 22 2 18.2 5 212 -24 51 59 50 47 42 18 53 6 2 46 51 59 -2.15 20 0 1 50 27 25 22 2 13.0 4 213 -24 52 47 4 48 23 4 53 55 30 47 31 47 -2.18 21 0 1 51 12 5 22 2 9.0 3 214 -23 53 35 48 49 4 51 54 46 42 48 12 32 -2.22 22 0 1 51 57 59 22 2 6.1 2 215 -22 54 26 8 49 47 40 .. .. .. 48 54 15 -2.31 23 0 1 52 45 7 22 2 4.3 1 215 -22 .. .. .. 50 31 31 .. .. .. 49 36 56 -2.57 24 0 1 53 33 33 22 2 3.7 0 216 -21 .. .. .. 51 16 25 .. .. .. 50 20 37 -7.97 25 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 52 2 23 .. .. .. 51 5 16 .... 26 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 52 49 24 .. .. .. 51 50 55 .... Uncertainty in time = +/- 15 secs Prediction of 2023 Aug 6.7 Data for the target star ------------------------ * name: UCAC4-307-168340 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 04 00.6760 DE: -28 42 26.035 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 04 00.6759 DE: -28 42 26.035 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (196) Philomela asteroid class: approx. diameter [km]: 140 approx. diameter ["]: 0.085 distance from Earth [AU]: 2.28580 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#131 date of fit: 2023 Jul 30 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): 0.030", 0.018", 97.727° remarks: * orbital elements for (196)Philomela : Mean anomaly = 8.9092608441 deg Arg. of pericenter = 203.5985251672 deg Long. of node = 72.2986226667 deg Inclination = 7.2628458821 deg Eccentricity = 0.0147925212 Semimajor axis = 3.1130002356 AU Perihelion dist = 3.0669511138 AU Mag: H = 6.74, G = 0.15 Epoch of elements : MJD 60166.92736111 TDT (2023 Aug 10.9274) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1312023Jul30,41.12,2023,8,10,22.276078,-0.063484,0.880404,-1.917877,-0.138973,0.004110,0.000396,0.000001,0.000000 -21.8942,-28.7071,-152.80,15.42,False UCAC4-307-168340,18.06685446,-28.7072318,0.00,12.48,0.00,0.0,0,,18.09196240,-28.7070869,0.42,0.00,0,0,0 196,Philomela,11.66,140.100,2.2858,0,0,-0.560,-0.53,,8.0,0 0,8.7428,2023,8,10,203.5985,72.2986,7.2628,0.01479,3.11300,3.06695,6.63,5.0,0.15 1.221,0.0303,0.0180,98,0.0353,Known errors,-1.00,0,-1,-1 20230810_168340,60162.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 06, 16:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org