IOTA/IOTA-ES occultation update for (174) Phaedra / TYC 2357-00476-1 event on 2024 Apr 02, 23:06 UT Visible from Summary ------- On 2024 Apr 02 UT, the 66.188 km diameter asteroid (174) Phaedra will occult a 11.4 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.26 mag to 14.64 mag (the magnitude of the asteroid) for at most 1.980 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: 2024 Apr 02, 23:04 - 2024 Apr 02, 23:09 * geocentric midpoint of event [JD]: 2460403.46307742 * magnitude of target star: 11.44 * magnitude drop [mag]: 3.26 * estimated maximum duration [s]: 1.980 * Moon: 40 % sunlit, 130° distance * Sun: 52° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 89 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.003", 78°) * approx speed of asteroid's shadow [km/s]: 33.4833 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2357-00476-1 by 174 Phaedra on 2024 Apr 2 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 131 0 0 32 13 50 23 4 28.0 0 53 25 .. .. .. 32 44 17 .. .. .. 32 52 30 .... 132 0 0 32 52 29 23 4 28.1 1 54 26 32 22 10 33 23 6 32 14 6 33 31 22 -0.70 133 0 0 33 31 25 23 4 28.2 2 54 26 33 0 57 34 2 13 32 52 49 34 10 31 -0.80 134 0 0 34 10 38 23 4 28.4 3 55 27 33 40 0 34 41 36 33 31 50 34 49 57 -0.84 135 0 0 34 50 7 23 4 28.7 4 55 28 34 19 18 35 21 14 34 11 6 35 29 38 -0.85 136 0 0 35 29 48 23 4 29.1 5 56 28 34 58 50 36 1 6 34 50 36 36 9 33 -0.86 137 0 0 36 9 42 23 4 29.6 6 57 29 35 38 35 36 41 9 35 30 17 36 49 39 -0.87 138 0 0 36 49 46 23 4 30.2 7 57 30 36 18 29 37 21 23 36 10 9 37 29 55 -0.88 139 0 0 37 29 58 23 4 30.9 8 58 30 36 58 32 38 1 44 36 50 10 38 10 19 -0.88 140 0 0 38 10 17 23 4 31.6 9 58 31 37 38 42 38 42 12 37 30 18 38 50 50 -0.88 141 0 0 38 50 41 23 4 32.4 10 59 31 38 18 58 39 22 45 38 10 31 39 31 25 -0.89 142 0 0 39 31 8 23 4 33.3 12 60 32 38 59 17 40 3 21 38 50 48 40 12 3 -0.89 143 0 0 40 11 37 23 4 34.2 13 60 32 39 39 38 40 43 59 39 31 7 40 52 43 -0.89 144 0 0 40 52 6 23 4 35.3 14 61 33 40 19 58 41 24 35 40 11 25 41 33 21 -0.89 145 0 0 41 32 31 23 4 36.4 14 62 33 41 0 17 42 5 8 40 51 42 42 13 56 -0.89 146 0 0 42 12 53 23 4 37.6 15 63 33 41 40 31 42 45 36 41 31 54 42 54 27 -0.89 147 0 0 42 53 8 23 4 38.8 16 63 34 42 20 40 43 25 59 42 12 1 43 34 51 -0.89 148 0 0 43 33 16 23 4 40.1 17 64 34 43 0 42 44 6 12 42 52 1 44 15 6 -0.89 149 0 0 44 13 14 23 4 41.4 18 65 34 43 40 33 44 46 16 43 31 52 44 55 12 -0.90 150 0 0 44 53 0 23 4 42.9 19 66 35 44 20 14 45 26 8 44 11 31 45 35 5 -0.90 151 0 0 45 32 32 23 4 44.3 20 66 35 44 59 43 46 5 45 44 50 58 46 14 44 -0.90 152 0 0 46 11 50 23 4 45.8 21 67 35 45 38 56 46 45 8 45 30 10 46 54 8 -0.90 153 0 0 46 50 51 23 4 47.4 22 68 35 46 17 53 47 24 13 46 9 7 47 33 14 -0.90 154 0 0 47 29 34 23 4 49.0 23 69 35 46 56 32 48 2 59 46 47 45 48 12 1 -0.90 155 0 0 48 7 57 23 4 50.7 24 70 36 47 34 52 48 41 25 47 26 4 48 50 27 -0.90 156 0 0 48 45 58 23 4 52.4 25 71 36 48 12 52 49 19 28 48 4 3 49 28 31 -0.90 157 0 0 49 23 36 23 4 54.1 25 72 36 48 50 28 49 57 8 48 41 39 50 6 12 -0.90 158 0 0 50 0 50 23 4 55.8 26 73 36 49 27 40 50 34 23 49 18 51 50 43 27 -0.90 159 0 0 50 37 38 23 4 57.6 27 74 36 50 4 28 51 11 11 49 55 38 51 20 16 -0.90 160 0 0 51 13 58 23 4 59.4 28 75 36 50 40 48 51 47 32 50 31 59 51 56 36 -0.90 161 0 0 51 49 50 23 5 1.3 28 76 36 51 16 41 52 23 24 51 7 51 52 32 28 -0.90 161 59 59 52 25 13 23 5 3.1 29 77 36 51 52 5 52 58 45 51 43 16 53 7 49 -0.90 162 59 59 53 0 5 23 5 5.0 30 78 36 52 26 59 53 33 36 52 18 10 53 42 39 -0.90 163 59 59 53 34 26 23 5 6.9 31 79 36 53 1 21 54 7 54 52 52 33 54 16 56 -0.90 164 59 59 54 8 14 23 5 8.8 31 80 36 53 35 12 54 41 39 53 26 25 54 50 41 -0.90 165 59 59 54 41 29 23 5 10.7 32 81 36 54 8 31 55 14 51 53 59 45 55 23 51 -0.90 166 59 59 55 14 10 23 5 12.6 33 82 36 54 41 16 55 47 28 54 32 30 55 56 28 -0.90 167 59 59 55 46 17 23 5 14.5 33 83 35 55 13 27 56 19 30 55 4 42 56 28 28 -0.90 168 59 59 56 17 49 23 5 16.4 34 84 35 55 45 3 56 50 57 55 36 20 56 59 54 -0.90 169 59 59 56 48 45 23 5 18.3 35 86 35 56 16 5 57 21 47 56 7 23 57 30 43 -0.90 170 59 59 57 19 5 23 5 20.2 35 87 35 56 46 31 57 52 1 56 37 51 58 0 55 -0.90 171 59 59 57 48 49 23 5 22.1 36 88 35 57 16 21 58 21 39 57 7 43 58 30 31 -0.90 172 59 59 58 17 57 23 5 24.0 36 89 35 57 45 35 58 50 40 57 36 59 58 59 30 -0.90 173 59 59 58 46 28 23 5 25.9 37 90 34 58 14 13 59 19 4 58 5 38 59 27 52 -0.90 174 59 59 59 14 22 23 5 27.8 37 92 34 58 42 15 59 46 50 58 33 42 59 55 36 -0.90 175 59 59 59 41 39 23 5 29.7 38 93 34 59 9 41 60 14 0 59 1 10 60 22 44 -0.90 176 59 59 60 8 20 23 5 31.6 38 94 34 59 36 30 60 40 32 59 28 1 60 49 14 -0.90 177 59 59 60 34 25 23 5 33.4 39 95 34 60 2 42 61 6 28 59 54 16 61 15 7 -0.90 178 59 59 60 59 53 23 5 35.2 39 97 33 60 28 19 61 31 47 60 19 55 61 40 24 -0.90 -180 0 1 61 24 44 23 5 37.0 40 98 33 60 53 20 61 56 30 60 44 58 62 5 4 -0.90 -179 0 1 61 49 0 23 5 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54 42 18 -0.93 - 25 0 0 53 25 59 23 8 52.0 22 292 -23 52 52 55 53 59 27 52 44 7 54 8 29 -0.93 - 24 0 0 52 51 35 23 8 53.4 21 293 -24 52 18 29 53 25 5 52 9 40 53 34 8 -0.93 - 23 0 0 52 16 40 23 8 54.7 21 294 -25 51 43 32 52 50 11 51 34 43 52 59 15 -0.93 - 22 0 0 51 41 14 23 8 56.0 20 295 -25 51 8 6 52 14 47 50 59 17 52 23 50 -0.93 - 21 0 0 51 5 20 23 8 57.3 19 295 -26 50 32 11 51 38 53 50 23 22 51 47 57 -0.94 - 20 0 0 50 28 58 23 8 58.6 18 296 -27 49 55 49 51 2 31 49 47 0 51 11 34 -0.94 - 19 0 0 49 52 9 23 8 59.8 17 297 -28 49 19 1 50 25 41 49 10 12 50 34 45 -0.94 - 18 0 0 49 14 55 23 9 1.0 16 298 -29 48 41 49 49 48 26 48 33 0 49 57 29 -0.94 - 17 0 0 48 37 17 23 9 2.1 15 299 -30 48 4 13 49 10 46 47 55 25 49 19 49 -0.95 - 16 0 0 47 59 17 23 9 3.2 15 300 -31 47 26 15 48 32 43 47 17 27 48 41 45 -0.95 - 15 0 0 47 20 56 23 9 4.2 14 300 -32 46 47 56 47 54 19 46 39 10 48 3 20 -0.95 - 14 0 0 46 42 15 23 9 5.2 13 301 -33 46 9 19 47 15 34 46 0 33 47 24 34 -0.96 - 13 0 0 46 3 16 23 9 6.1 12 302 -33 45 30 24 46 36 31 45 21 39 46 45 30 -0.96 - 12 0 0 45 24 1 23 9 6.9 11 303 -34 44 51 14 45 57 12 44 42 30 46 6 10 -0.97 - 11 0 0 44 44 32 23 9 7.7 10 304 -35 44 11 50 45 17 38 44 3 7 45 26 34 -0.97 - 10 0 0 44 4 50 23 9 8.5 9 304 -36 43 32 13 44 37 50 43 23 32 44 46 45 -0.98 - 9 0 0 43 24 57 23 9 9.1 8 305 -37 42 52 26 43 57 51 42 43 46 44 6 44 -0.99 - 8 0 0 42 44 55 23 9 9.7 7 306 -38 42 12 30 43 17 42 42 3 52 43 26 33 -1.01 - 7 0 0 42 4 45 23 9 10.2 6 306 -39 41 32 27 42 37 25 41 23 51 42 46 15 -1.02 - 6 0 0 41 24 30 23 9 10.7 5 307 -40 40 52 19 41 57 3 40 43 45 42 5 50 -1.05 - 5 0 0 40 44 11 23 9 11.0 4 308 -41 40 12 7 41 16 36 40 3 35 41 25 21 -1.08 - 4 0 0 40 3 50 23 9 11.3 3 308 -42 39 31 54 40 36 7 39 23 24 40 44 50 -1.14 - 3 0 0 39 23 29 23 9 11.5 2 309 -43 38 51 41 39 55 38 38 43 13 40 4 19 -1.27 - 2 0 0 38 43 10 23 9 11.7 1 310 -44 38 11 31 39 15 10 38 3 5 39 23 49 -1.66 - 1 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 38 34 46 .. .. .. 38 43 22 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: TYC 2357-00476-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 00 47.8595 DE: +30 32 50.189 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 00 47.8593 DE: +30 32 50.188 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.4 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (174) Phaedra asteroid class: approx. diameter [km]: 66 approx. diameter ["]: 0.024 distance from Earth [AU]: 3.80040 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#70 date of fit: 2023 Apr 27 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): 0.009", 0.003", 78.1° remarks: * orbital elements for (174)Phaedra : Mean anomaly = 179.7342568144 deg Arg. of pericenter = 290.6990331482 deg Long. of node = 327.3290479807 deg Inclination = 12.0925710472 deg Eccentricity = 0.1440401084 Semimajor axis = 2.8618442529 AU Perihelion dist = 2.4496238964 AU Mag: H = 8.37, G = 0.15 Epoch of elements : MJD 60402.96307721 TDT (2024 Apr 02.9631) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#702023Apr27,1.98,2024,4,2,23.113858,-0.043551,0.664331,18.858488,1.235559,0.004357,0.001518,-0.000001,0.000000 -117.9150,30.6160,-165.89,5.40,False TYC 2357-00476-1,4.01329434,30.5472749,11.86,11.44,11.21,0.0,0,,4.03820390,30.6159848,3.25,3.04,0,0,0 174,Phaedra,14.64,66.188,3.8004,0,0,3.381,2.86,,3.4,0 0,179.5382,2024,4,2,290.6990,327.3290,12.0926,0.14404,2.86184,2.44962,8.37,5.0,0.15 1.134,0.0090,0.0030,78,0.0032,Known errors,1.23,0,-1,-1 20240402_0476-1,60139.27 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org