IOTA/IOTA-ES occultation update for (322) Phaeo / TYC 5551-00405-1 event on 2024 Jul 02, 08:32 UT Visible from Summary ------- On 2024 Jul 02 UT, the 72.0207902497953 km diameter asteroid (322) Phaeo will occult a 9.0 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.84 mag to 14.84 mag (the magnitude of the asteroid) for at most 12.290 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 Jul 02, 08:15 - 2024 Jul 02, 08:49 * geocentric midpoint of event [JD]: 2460493.85611058 * magnitude of target star: 9.00 * magnitude drop [mag]: 5.84 * estimated maximum duration [s]: 12.290 * Moon: 15 % sunlit, 152° distance * Sun: 107° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 80 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.001", 106°) * approx speed of asteroid's shadow [km/s]: 5.8923 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5551-00405-1 by 322 Phaeo on 2024 Jul 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 57 0 0 .. .. .... .. .. .. .. .. .. -39 42 51 .. .. .. -39 47 38 .. .. .. .... 58 0 0 -39 35 55 8 16 24.0 1 109 28 -39 58 55 -39 13 0 -40 3 41 -39 8 16 .... 59 0 0 -39 51 43 8 16 24.3 2 108 27 -40 14 41 -39 28 50 -40 19 26 -39 24 7 0.43 60 0 0 -40 7 14 8 16 24.9 2 107 27 -40 30 9 -39 44 24 -40 34 55 -39 39 40 0.45 61 0 0 -40 22 28 8 16 25.8 3 107 27 -40 45 21 -39 59 40 -40 50 5 -39 54 57 0.45 62 0 0 -40 37 24 8 16 26.9 4 106 26 -41 0 14 -40 14 38 -41 4 59 -40 9 56 0.46 63 0 0 -40 52 3 8 16 28.2 5 105 26 -41 14 51 -40 29 19 -41 19 34 -40 24 37 0.46 64 0 0 -41 6 23 8 16 29.7 6 105 26 -41 29 9 -40 43 42 -41 33 52 -40 39 1 0.46 65 0 0 -41 20 26 8 16 31.4 6 104 25 -41 43 9 -40 57 47 -41 47 52 -40 53 6 0.46 66 0 0 -41 34 11 8 16 33.4 7 103 25 -41 56 51 -41 11 34 -42 1 34 -41 6 54 0.46 67 0 0 -41 47 37 8 16 35.6 8 103 25 -42 10 16 -41 25 3 -42 14 57 -41 20 23 0.46 68 0 0 -42 0 46 8 16 38.0 9 102 24 -42 23 22 -41 38 14 -42 28 3 -41 33 35 0.46 69 0 0 -42 13 36 8 16 40.6 10 101 24 -42 36 9 -41 51 6 -42 40 50 -41 46 28 0.46 70 0 0 -42 26 8 8 16 43.4 10 101 24 -42 48 39 -42 3 41 -42 53 19 -41 59 2 0.46 71 0 0 -42 38 21 8 16 46.4 11 100 23 -43 0 50 -42 15 56 -43 5 30 -42 11 18 0.46 72 0 0 -42 50 16 8 16 49.6 12 99 23 -43 12 42 -42 27 53 -43 17 21 -42 23 16 0.46 73 0 0 -43 1 52 8 16 53.0 13 98 22 -43 24 16 -42 39 32 -43 28 55 -42 34 55 0.46 74 0 0 -43 13 10 8 16 56.6 13 98 22 -43 35 31 -42 50 52 -43 40 10 -42 46 15 0.46 75 0 0 -43 24 9 8 17 0.4 14 97 22 -43 46 28 -43 1 53 -43 51 6 -42 57 17 0.46 76 0 0 -43 34 49 8 17 4.3 15 96 21 -43 57 6 -43 12 36 -44 1 44 -43 8 0 0.46 77 0 0 -43 45 11 8 17 8.5 16 96 21 -44 7 26 -43 23 0 -44 12 3 -43 18 25 0.46 78 0 0 -43 55 14 8 17 12.8 16 95 20 -44 17 27 -43 33 5 -44 22 3 -43 28 30 0.46 79 0 0 -44 4 58 8 17 17.4 17 94 20 -44 27 8 -43 42 51 -44 31 45 -43 38 17 0.46 80 0 0 -44 14 23 8 17 22.1 18 93 20 -44 36 32 -43 52 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30 8 41 3.4 52 281 -55 -27 58 37 -27 10 29 -28 3 37 -27 5 31 0.48 -167 0 0 -27 8 50 8 41 20.3 51 280 -56 -27 32 57 -26 44 48 -27 37 57 -26 39 50 0.48 -166 0 0 -26 43 4 8 41 37.1 50 279 -57 -27 7 11 -26 19 2 -27 12 12 -26 14 4 0.48 -165 0 0 -26 17 13 8 41 53.7 49 278 -58 -26 41 20 -25 53 11 -26 46 21 -25 48 13 0.48 -164 0 0 -25 51 18 8 42 10.2 48 277 -58 -26 15 25 -25 27 15 -26 20 26 -25 22 17 0.48 -163 0 0 -25 25 19 8 42 26.4 47 276 -59 -25 49 26 -25 1 17 -25 54 27 -24 56 19 0.48 -162 0 0 -24 59 18 8 42 42.5 46 275 -60 -25 23 25 -24 35 16 -25 28 25 -24 30 18 0.48 -161 0 0 -24 33 15 8 42 58.3 46 274 -61 -24 57 22 -24 9 13 -25 2 22 -24 4 15 0.48 -160 0 0 -24 7 11 8 43 14.0 45 273 -62 -24 31 17 -23 43 9 -24 36 17 -23 38 12 0.48 -159 0 0 -23 41 7 8 43 29.4 44 272 -63 -24 5 12 -23 17 6 -24 10 12 -23 12 8 0.48 -158 0 0 -23 15 3 8 43 44.5 43 271 -64 -23 39 8 -22 51 3 -23 44 8 -22 46 6 0.48 -157 0 0 -22 49 1 8 43 59.5 42 270 -65 -23 13 5 -22 25 2 -23 18 5 -22 20 5 0.48 -156 0 0 -22 23 1 8 44 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262 -76 -17 42 40 -16 55 17 -17 47 35 -16 50 24 0.49 -143 0 0 -16 54 38 8 46 56.9 27 262 -77 -17 18 19 -16 31 1 -17 23 14 -16 26 8 0.50 -142 0 0 -16 30 32 8 47 7.0 26 261 -77 -16 54 11 -16 6 58 -16 59 6 -16 2 5 0.50 -141 0 0 -16 6 40 8 47 16.8 25 261 -78 -16 30 16 -15 43 8 -16 35 10 -15 38 16 0.50 -140 0 0 -15 43 1 8 47 26.1 24 261 -79 -16 6 36 -15 19 32 -16 11 29 -15 14 40 0.50 -139 0 0 -15 19 38 8 47 35.1 23 260 -79 -15 43 10 -14 56 10 -15 48 3 -14 51 20 0.50 -138 0 0 -14 56 29 8 47 43.7 22 260 -79 -15 19 59 -14 33 4 -15 24 51 -14 28 14 0.50 -137 0 0 -14 33 36 8 47 51.9 21 260 -80 -14 57 3 -14 10 14 -15 1 55 -14 5 24 0.50 -136 0 0 -14 11 0 8 47 59.8 20 259 -80 -14 34 24 -13 47 40 -14 39 16 -13 42 51 0.50 -135 0 0 -13 48 40 8 48 7.2 19 259 -80 -14 12 2 -13 25 23 -14 16 53 -13 20 34 0.50 -134 0 0 -13 26 37 8 48 14.2 18 259 -80 -13 49 57 -13 3 23 -13 54 47 -12 58 35 0.50 -133 0 0 -13 4 53 8 48 20.9 17 258 -80 -13 28 9 -12 41 41 -13 32 59 -12 36 53 0.50 -132 0 0 -12 43 26 8 48 27.1 16 258 -80 -13 6 40 -12 20 17 -13 11 29 -12 15 30 0.51 -131 0 0 -12 22 18 8 48 32.9 15 258 -79 -12 45 29 -11 59 11 -12 50 18 -11 54 25 0.51 -130 0 0 -12 1 29 8 48 38.4 14 258 -79 -12 24 38 -11 38 25 -12 29 26 -11 33 39 0.51 -129 0 0 -11 40 59 8 48 43.4 13 257 -78 -12 4 5 -11 17 58 -12 8 53 -11 13 13 0.51 -128 0 0 -11 20 50 8 48 48.1 12 257 -78 -11 43 53 -10 57 51 -11 48 40 -10 53 6 0.51 -127 0 0 -11 1 0 8 48 52.3 11 257 -77 -11 24 1 -10 38 4 -11 28 47 -10 33 20 0.52 -126 0 0 -10 41 31 8 48 56.1 10 257 -77 -11 4 29 -10 18 37 -11 9 15 -10 13 54 0.52 -125 0 0 -10 22 22 8 48 59.6 9 256 -76 -10 45 18 - 9 59 32 -10 50 3 - 9 54 48 0.52 -124 0 0 -10 3 35 8 49 2.6 8 256 -75 -10 26 28 - 9 40 47 -10 31 12 - 9 36 4 0.53 -123 0 0 - 9 45 9 8 49 5.2 6 256 -75 -10 7 59 - 9 22 24 -10 12 43 - 9 17 41 0.54 -122 0 0 - 9 27 5 8 49 7.5 5 256 -74 - 9 49 52 - 9 4 22 - 9 54 36 - 8 59 40 0.55 -121 0 0 - 9 9 22 8 49 9.4 4 256 -73 - 9 32 7 - 8 46 42 - 9 36 50 - 8 42 1 0.56 -120 0 0 - 8 52 2 8 49 10.8 3 256 -72 - 9 14 44 - 8 29 24 - 9 19 26 - 8 24 43 0.58 -119 0 0 - 8 35 4 8 49 11.9 2 255 -71 - 8 57 43 - 8 12 28 - 9 2 25 - 8 7 48 0.63 -118 0 0 - 8 18 28 8 49 12.6 1 255 -71 - 8 41 5 - 7 55 55 - 8 45 47 - 7 51 16 0.74 -117 0 0 - 8 2 15 8 49 12.9 0 255 -70 - 8 24 50 - 7 39 45 - 8 29 31 - 7 35 6 1.66 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 5551-00405-1 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 36 12.9599 DE: -14 37 24.236 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 36 12.9598 DE: -14 37 24.235 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.0 * B mag [mag]: 9.9 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (322) Phaeo asteroid class: approx. diameter [km]: 72 approx. diameter ["]: 0.035 distance from Earth [AU]: 2.80040 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#66 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): 0.007", 0.001", 106.477° remarks: * orbital elements for (322)Phaeo : Mean anomaly = 237.5889240029 deg Arg. of pericenter = 114.8840967301 deg Long. of node = 252.2857484119 deg Inclination = 8.0457110311 deg Eccentricity = 0.2443339150 Semimajor axis = 2.7844762324 AU Perihelion dist = 2.1041342532 AU Mag: H = 9.13, G = 0.15 Epoch of elements : MJD 60493.35611088 TDT (2024 Jul 02.3561) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#662023Apr24,12.29,2024,7,2,8.546654,0.115920,-0.397120,3.192505,0.931986,0.005094,-0.001854,0.000000,0.000000 155.3065,-14.7494,52.84,22.99,False TYC 5551-00405-1,13.60359998,-14.6233988,9.87,9.00,8.53,0.2,0,,13.62551064,-14.7494194,5.84,5.86,0,0,0 322,Phaeo,14.84,72.427,2.8004,0,0,0.692,2.92,,3.6,0 0,237.5134,2024,7,2,114.8841,252.2857,8.0457,0.24433,2.78448,2.10413,9.13,5.0,0.15 1.104,0.0067,0.0010,106,0.0037,Known errors,1.19,0,-1,-1 20240702_0405-1,60140.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org