IOTA/IOTA-ES occultation update for (196) Philomela / TYC 6854-02161-1 event on 2023 Aug 04, 18:56 UT Visible from SW Asia, Africa Summary ------- On 2023 Aug 04 UT, the 140.1 km diameter asteroid (196) Philomela will occult a 12.0 mag star in the constellation Sagittarius for observers along a path across SW Asia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.57 mag to 11.55 mag (the magnitude of the asteroid) for at most 25.230 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 04, 18:47 - 2023 Aug 04, 19:06 * geocentric midpoint of event [JD]: 2460161.28954700 * magnitude of target star: 11.95 * magnitude drop [mag]: 0.57 * estimated maximum duration [s]: 25.230 * Moon: 86 % sunlit, 84° distance * Sun: 139° distance * rough path description: SW Asia, Africa The occultation path -------------------- * approximate projected width [km]: 313 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 9.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.031, +/- 0.019) * 1 sigma uncertainty ellipse (major, minor, PA): (0.031", 0.018", 97°) * approx speed of asteroid's shadow [km/s]: 5.5540 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6854-02161-1 by 196 Philomela on 2023 Aug 4 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 - 21 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 47 36 49 .. .. .. 46 44 51 .... - 20 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 46 56 15 .. .. .. 46 5 18 .... - 19 0 0 48 17 59 19 5 26.1 0 137 15 .. .. .. 46 16 49 .. .. .. 45 26 50 .... - 18 0 0 47 37 11 19 5 25.5 1 137 15 .. .. .. 45 38 30 .. .. .. 44 49 25 -1.11 - 17 0 0 46 57 38 19 5 24.2 2 138 14 49 6 26 45 1 18 .. .. .. 44 13 4 -1.51 - 16 0 0 46 19 20 19 5 22.2 3 139 13 48 25 12 44 25 11 49 25 35 43 37 45 -1.68 - 15 0 0 45 42 15 19 5 19.5 4 140 12 47 45 22 43 50 9 48 44 14 43 3 29 -1.78 - 14 0 0 45 6 20 19 5 16.2 5 140 11 47 6 56 43 16 10 48 4 23 42 30 13 -1.84 - 13 0 0 44 31 35 19 5 12.3 6 141 11 46 29 50 42 43 14 47 25 59 41 57 57 -1.88 - 12 0 0 43 57 59 19 5 7.9 7 142 10 45 54 2 42 11 20 46 48 59 41 26 42 -1.91 - 11 0 0 43 25 30 19 5 2.8 8 142 9 45 19 29 41 40 27 46 13 20 40 56 25 -1.93 - 10 0 0 42 54 7 19 4 57.2 9 143 8 44 46 11 41 10 35 45 39 0 40 27 8 -1.95 - 9 0 0 42 23 49 19 4 51.1 9 144 7 44 14 5 40 41 42 45 5 56 39 58 48 -1.96 - 8 0 0 41 54 35 19 4 44.4 10 145 7 43 43 10 40 13 49 44 34 8 39 31 25 -1.97 - 7 0 0 41 26 24 19 4 37.3 11 145 6 43 13 24 39 46 54 44 3 32 39 5 0 -1.98 - 6 0 0 40 59 16 19 4 29.7 12 146 5 42 44 47 39 20 58 43 34 7 38 39 31 -1.99 - 5 0 0 40 33 9 19 4 21.6 13 147 4 42 17 16 38 55 59 43 5 53 38 14 58 -1.99 - 4 0 0 40 8 2 19 4 13.1 13 147 3 41 50 51 38 31 56 42 38 47 37 51 20 -2.00 - 3 0 0 39 43 55 19 4 4.2 14 148 2 41 25 31 38 8 50 42 12 48 37 28 37 -2.00 - 2 0 0 39 20 48 19 3 54.8 15 149 2 41 1 14 37 46 39 41 47 56 37 6 49 -2.00 - 1 0 0 38 58 39 19 3 45.1 15 150 1 40 37 59 37 25 24 41 24 8 36 45 55 -2.00 0 0 0 38 37 27 19 3 34.9 16 150 0 40 15 47 37 5 3 41 1 24 36 25 54 -2.00 1 0 0 38 17 13 19 3 24.4 17 151 -1 39 54 35 36 45 37 40 39 43 36 6 46 -2.01 2 0 0 37 57 55 19 3 13.6 17 152 -2 39 34 24 36 27 4 40 19 4 35 48 30 -2.01 3 0 0 37 39 33 19 3 2.4 18 152 -3 39 15 12 36 9 24 39 59 26 35 31 7 -2.01 4 0 0 37 22 7 19 2 50.9 19 153 -3 38 56 58 35 52 37 39 40 49 35 14 36 -2.01 5 0 0 37 5 36 19 2 39.1 19 154 -4 38 39 43 35 36 43 39 23 11 34 58 57 -2.01 6 0 0 36 49 59 19 2 27.0 20 155 -5 38 23 25 35 21 41 39 6 32 34 44 9 -2.01 7 0 0 36 35 16 19 2 14.7 20 156 -6 38 8 3 35 7 31 38 50 52 34 30 11 -2.01 8 0 0 36 21 27 19 2 2.0 21 156 -7 37 53 38 34 54 12 38 36 9 34 17 4 -2.01 9 0 0 36 8 31 19 1 49.2 21 157 -7 37 40 9 34 41 44 38 22 23 34 4 47 -2.01 10 0 0 35 56 28 19 1 36.0 22 158 -8 37 27 35 34 30 7 38 9 34 33 53 20 -2.01 11 0 0 35 45 17 19 1 22.7 22 159 -9 37 15 57 34 19 20 37 57 41 33 42 43 -2.01 12 0 0 35 34 59 19 1 9.1 23 160 -10 37 5 12 34 9 24 37 46 44 33 32 56 -2.01 13 0 0 35 25 32 19 0 55.3 23 160 -10 36 55 22 34 0 17 37 36 42 33 23 57 -2.01 14 0 0 35 16 57 19 0 41.4 24 161 -11 36 46 26 33 52 1 37 27 35 33 15 48 -2.01 15 0 0 35 9 14 19 0 27.2 24 162 -12 36 38 23 33 44 34 37 19 23 33 8 27 -2.00 16 0 0 35 2 21 19 0 12.9 24 163 -13 36 31 14 33 37 56 37 12 5 33 1 55 -2.00 17 0 0 34 56 20 18 59 58.4 25 164 -13 36 24 58 33 32 7 37 5 42 32 56 12 -2.00 18 0 0 34 51 9 18 59 43.8 25 165 -14 36 19 34 33 27 8 37 0 11 32 51 17 -2.00 19 0 0 34 46 49 18 59 29.1 25 166 -15 36 15 3 33 22 57 36 55 35 32 47 9 -2.00 20 0 0 34 43 20 18 59 14.2 25 166 -15 36 11 25 33 19 35 36 51 52 32 43 50 -2.00 21 0 0 34 40 40 18 58 59.2 26 167 -16 36 8 39 33 17 1 36 49 2 32 41 19 -2.00 22 0 0 34 38 51 18 58 44.1 26 168 -17 36 6 44 33 15 16 36 47 5 32 39 36 -2.01 23 0 0 34 37 52 18 58 29.0 26 169 -17 36 5 41 33 14 20 36 46 0 32 38 41 -2.01 24 0 0 34 37 43 18 58 13.7 26 170 -18 36 5 30 33 14 12 36 45 49 32 38 33 -2.01 25 0 0 34 38 23 18 57 58.4 26 171 -19 36 6 11 33 14 53 36 46 30 32 39 14 -2.01 26 0 0 34 39 54 18 57 43.0 26 172 -19 36 7 44 33 16 21 36 48 4 32 40 41 -2.01 27 0 0 34 42 15 18 57 27.6 26 173 -20 36 10 9 33 18 38 36 50 32 32 42 56 -2.01 28 0 0 34 45 25 18 57 12.2 26 174 -20 36 13 27 33 21 43 36 53 52 32 45 59 -2.01 29 0 0 34 49 25 18 56 56.7 26 175 -21 36 17 35 33 25 36 36 58 5 32 49 49 -2.01 30 0 0 34 54 16 18 56 41.2 26 176 -21 36 22 36 33 30 17 37 3 10 32 54 27 -2.01 31 0 0 34 59 56 18 56 25.7 26 176 -22 36 28 28 33 35 47 37 9 9 32 59 53 -2.01 32 0 0 35 6 26 18 56 10.3 26 177 -22 36 35 13 33 42 5 37 16 1 33 6 6 -2.02 33 0 0 35 13 46 18 55 54.8 26 178 -23 36 42 49 33 49 12 37 23 46 33 13 8 -2.02 34 0 0 35 21 57 18 55 39.4 26 179 -23 36 51 19 33 57 7 37 32 25 33 20 57 -2.02 35 0 0 35 30 59 18 55 24.0 26 180 -24 37 0 42 34 5 51 37 41 57 33 29 34 -2.02 36 0 0 35 40 51 18 55 8.7 26 181 -24 37 10 57 34 15 24 37 52 24 33 38 59 -2.02 37 0 0 35 51 35 18 54 53.5 26 182 -25 37 22 5 34 25 46 38 3 44 33 49 13 -2.03 38 0 0 36 3 9 18 54 38.3 25 183 -25 37 34 6 34 36 58 38 16 0 34 0 15 -2.03 39 0 0 36 15 35 18 54 23.3 25 184 -25 37 47 2 34 48 58 38 29 10 34 12 6 -2.03 40 0 0 36 28 52 18 54 8.3 25 185 -26 38 0 51 35 1 49 38 43 15 34 24 45 -2.03 41 0 0 36 43 2 18 53 53.4 25 186 -26 38 15 35 35 15 29 38 58 17 34 38 14 -2.04 42 0 0 36 58 3 18 53 38.7 24 186 -26 38 31 14 35 29 59 39 14 14 34 52 32 -2.04 43 0 0 37 13 57 18 53 24.2 24 187 -26 38 47 47 35 45 20 39 31 8 35 7 39 -2.04 44 0 0 37 30 44 18 53 9.7 23 188 -27 39 5 17 36 1 31 39 48 59 35 23 36 -2.05 45 0 0 37 48 24 18 52 55.5 23 189 -27 39 23 43 36 18 32 40 7 48 35 40 23 -2.05 46 0 0 38 6 58 18 52 41.4 23 190 -27 39 43 5 36 36 25 40 27 36 35 57 59 -2.05 47 0 0 38 26 25 18 52 27.6 22 191 -27 40 3 26 36 55 9 40 48 23 36 16 26 -2.06 48 0 0 38 46 48 18 52 13.9 22 192 -27 40 24 44 37 14 45 41 10 9 36 35 44 -2.06 49 0 0 39 8 6 18 52 0.5 21 192 -27 40 47 1 37 35 14 41 32 56 36 55 54 -2.06 50 0 0 39 30 19 18 51 47.3 21 193 -27 41 10 17 37 56 35 41 56 44 37 16 55 -2.07 51 0 0 39 53 28 18 51 34.3 20 194 -28 41 34 32 38 18 49 42 21 34 37 38 47 -2.07 52 0 0 40 17 33 18 51 21.7 20 195 -28 41 59 48 38 41 56 42 47 28 38 1 32 -2.08 53 0 0 40 42 35 18 51 9.3 19 196 -28 42 26 6 39 5 57 43 14 25 38 25 9 -2.08 54 0 0 41 8 36 18 50 57.2 18 197 -27 42 53 28 39 30 52 43 42 28 38 49 39 -2.09 55 0 0 41 35 35 18 50 45.5 18 197 -27 43 21 52 39 56 42 44 11 38 39 15 2 -2.09 56 0 0 42 3 33 18 50 34.1 17 198 -27 43 51 22 40 23 27 44 41 56 39 41 19 -2.10 57 0 0 42 32 32 18 50 23.0 16 199 -27 44 21 58 40 51 8 45 13 23 40 8 30 -2.10 58 0 0 43 2 31 18 50 12.3 16 200 -27 44 53 41 41 19 45 45 46 2 40 36 35 -2.11 59 0 0 43 33 32 18 50 2.0 15 201 -27 45 26 32 41 49 18 46 19 52 41 5 36 -2.11 60 0 0 44 5 36 18 49 52.2 14 201 -26 46 0 34 42 19 49 46 54 58 41 35 32 -2.12 61 0 0 44 38 43 18 49 42.7 13 202 -26 46 35 48 42 51 19 47 31 20 42 6 25 -2.12 62 0 0 45 12 55 18 49 33.7 13 203 -26 47 12 15 43 23 47 48 9 2 42 38 14 -2.13 63 0 0 45 48 13 18 49 25.2 12 204 -25 47 49 58 43 57 14 48 48 6 43 11 0 -2.14 64 0 0 46 24 38 18 49 17.2 11 204 -25 48 28 59 44 31 41 49 28 34 43 44 43 -2.14 65 0 0 47 2 11 18 49 9.7 10 205 -25 49 9 20 45 7 9 50 10 30 44 19 25 -2.15 66 0 0 47 40 54 18 49 2.7 9 206 -24 49 51 4 45 43 39 50 53 58 44 55 6 -2.16 67 0 0 48 20 49 18 48 56.3 8 207 -24 50 34 15 46 21 11 51 39 3 45 31 46 -2.17 68 0 0 49 1 56 18 48 50.5 8 208 -23 51 18 55 46 59 46 52 25 48 46 9 26 -2.18 69 0 0 49 44 19 18 48 45.3 7 208 -23 52 5 9 47 39 25 53 14 22 46 48 7 -2.19 70 0 0 50 27 58 18 48 40.8 6 209 -22 52 53 2 48 20 9 54 4 49 47 27 50 -2.21 71 0 0 51 12 57 18 48 36.9 5 210 -21 53 42 38 49 2 0 54 57 19 48 8 34 -2.24 72 0 0 51 59 17 18 48 33.7 4 211 -21 54 34 5 49 44 57 55 52 2 48 50 21 -2.28 73 0 0 52 47 3 18 48 31.3 3 211 -20 55 27 30 50 29 3 .. .. .. 49 33 11 -2.34 74 0 0 53 36 16 18 48 29.6 2 212 -19 .. .. .. 51 14 18 .. .. .. 50 17 6 -2.48 75 0 0 54 27 0 18 48 28.7 1 213 -18 .. .. .. 52 0 45 .. .. .. 51 2 6 -3.04 76 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 52 48 23 .. .. .. 51 48 12 .... 77 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 53 37 16 .. .. .. 52 35 25 .... 78 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 53 23 46 .... Uncertainty in time = +/- 9 secs Prediction of 2023 Jun 15.2 Data for the target star ------------------------ * name: TYC 6854-02161-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 05 51.2613 DE: -28 40 31.361 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 05 51.2613 DE: -28 40 31.361 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (196) Philomela asteroid class: approx. diameter [km]: 140 approx. diameter ["]: 0.087 distance from Earth [AU]: 2.22700 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#130 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): 0.031", 0.018", 97.369° remarks: * orbital elements for (196)Philomela : Mean anomaly = 7.8112627501 deg Arg. of pericenter = 203.5948478778 deg Long. of node = 72.2985499170 deg Inclination = 7.2628313279 deg Eccentricity = 0.0148010250 Semimajor axis = 3.1130263708 AU Perihelion dist = 3.0669503897 AU Mag: H = 6.63, G = 0.15 Epoch of elements : MJD 60160.78902778 TDT (2023 Aug 04.7890) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1302023Apr24,25.23,2023,8,4,18.949128,-0.079214,0.890697,-3.122531,-0.277519,0.003624,0.000440,0.000001,0.000000 34.5214,-28.6741,-102.70,17.15,False TYC 6854-02161-1,18.09757260,-28.6753782,0.00,11.95,0.00,0.0,0,,18.12269088,-28.6741447,0.57,0.00,0,0,0 196,Philomela,11.55,140.100,2.2270,0,0,-0.936,-1.10,,8.0,0 0,7.6697,2023,8,4,203.5948,72.2985,7.2628,0.01480,3.11303,3.06695,6.63,5.0,0.15 1.221,0.0313,0.0183,97,0.0191,Known errors,-1.00,-1,-1,-1 20230804_2161-1,60110.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jun 15, 05:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org