IOTA/IOTA-ES occultation update for (173) Ino / TYC 88-00424-1 event on 2024 Jan 07, 11:03 UT Visible from Summary ------- On 2024 Jan 07 UT, the 140.636 km diameter asteroid (173) Ino will occult a 11.8 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.73 mag to 11.76 mag (the magnitude of the asteroid) for at most 16.890 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 Jan 07, 10:50 - 2024 Jan 07, 11:16 * geocentric midpoint of event [JD]: 2460316.96075771 * magnitude of target star: 11.80 * magnitude drop [mag]: 0.73 * estimated maximum duration [s]: 16.890 * Moon: 20 % sunlit, 151° distance * Sun: 141° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 141 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.002", 81°) * approx speed of asteroid's shadow [km/s]: 8.3268 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 88-00424-1 by 173 Ino on 2024 Jan 7 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 64 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 50 46 12 .. .. .. .... 65 0 0 50 0 38 11 16 13.5 1 87 4 50 38 40 49 22 37 50 48 47 49 12 30 .... 66 0 0 50 2 45 11 16 13.3 1 87 4 50 40 46 49 24 46 50 50 52 49 14 39 -0.03 67 0 0 50 4 22 11 16 13.1 2 88 3 50 42 21 49 26 24 50 52 28 49 16 18 -0.03 68 0 0 50 5 29 11 16 12.8 3 89 3 50 43 27 49 27 32 50 53 34 49 17 26 -0.03 69 0 0 50 6 6 11 16 12.3 3 90 2 50 44 4 49 28 9 50 54 10 49 18 3 -0.03 70 0 0 50 6 13 11 16 11.8 4 90 2 50 44 11 49 28 16 50 54 17 49 18 10 -0.03 71 0 0 50 5 50 11 16 11.2 4 91 1 50 43 48 49 27 53 50 53 54 49 17 47 -0.03 72 0 0 50 4 57 11 16 10.5 5 92 1 50 42 56 49 26 59 50 53 2 49 16 53 -0.03 73 0 0 50 3 34 11 16 9.7 6 93 0 50 41 34 49 25 35 50 51 41 49 15 29 -0.03 74 0 0 50 1 42 11 16 8.8 6 93 0 50 39 43 49 23 41 50 49 50 49 13 35 -0.03 75 0 0 49 59 19 11 16 7.8 7 94 -1 50 37 22 49 21 17 50 47 30 49 11 10 -0.03 76 0 0 49 56 26 11 16 6.7 8 95 -1 50 34 32 49 18 22 50 44 40 49 8 14 -0.03 77 0 0 49 53 4 11 16 5.5 8 96 -2 50 31 12 49 14 56 50 41 21 49 4 48 -0.03 78 0 0 49 49 11 11 16 4.2 9 96 -2 50 27 22 49 11 0 50 37 31 49 0 51 -0.03 79 0 0 49 44 47 11 16 2.8 10 97 -3 50 23 2 49 6 34 50 33 12 48 56 24 -0.03 80 0 0 49 39 53 11 16 1.3 10 98 -3 50 18 12 49 1 36 50 28 23 48 51 25 -0.03 81 0 0 49 34 29 11 15 59.7 11 99 -4 50 12 51 48 56 7 50 23 4 48 45 55 -0.03 82 0 0 49 28 33 11 15 58.0 12 99 -4 50 7 0 48 50 7 50 17 14 48 39 54 -0.03 83 0 0 49 22 7 11 15 56.2 12 100 -5 50 0 39 48 43 36 50 10 54 48 33 22 -0.03 84 0 0 49 15 9 11 15 54.3 13 101 -5 49 53 46 48 36 33 50 4 3 48 26 17 -0.03 85 0 0 49 7 40 11 15 52.3 14 102 -6 49 46 22 48 28 58 49 56 40 48 18 41 -0.03 86 0 0 48 59 39 11 15 50.1 14 102 -6 49 38 27 48 20 51 49 48 47 48 10 32 -0.04 87 0 0 48 51 5 11 15 47.9 15 103 -7 49 30 0 48 12 11 49 40 22 48 1 51 -0.04 88 0 0 48 42 0 11 15 45.6 16 104 -8 49 21 1 48 2 59 49 31 24 47 52 36 -0.04 89 0 0 48 32 21 11 15 43.1 16 105 -8 49 11 30 47 53 13 49 21 55 47 42 49 -0.04 90 0 0 48 22 9 11 15 40.5 17 105 -9 49 1 26 47 42 54 49 11 53 47 32 28 -0.04 91 0 0 48 11 24 11 15 37.8 18 106 -9 48 50 48 47 32 1 49 1 17 47 21 33 -0.04 92 0 0 48 0 5 11 15 35.0 18 107 -10 48 39 38 47 20 34 48 50 9 47 10 3 -0.04 93 0 0 47 48 12 11 15 32.0 19 108 -10 48 27 53 47 8 32 48 38 26 46 57 59 -0.04 94 0 0 47 35 44 11 15 29.0 20 108 -11 48 15 34 46 55 55 48 26 10 46 45 20 -0.04 95 0 0 47 22 40 11 15 25.7 20 109 -11 48 2 40 46 42 42 48 13 18 46 32 5 -0.04 96 0 0 47 9 1 11 15 22.4 21 110 -12 47 49 10 46 28 54 47 59 51 46 18 13 -0.04 97 0 0 46 54 46 11 15 18.9 22 110 -12 47 35 5 46 14 28 47 45 49 46 3 46 -0.04 98 0 0 46 39 54 11 15 15.3 22 111 -13 47 20 24 45 59 26 47 31 10 45 48 41 -0.04 99 0 0 46 24 25 11 15 11.5 23 112 -13 47 5 6 45 43 46 47 15 55 45 32 58 -0.04 100 0 0 46 8 19 11 15 7.6 24 113 -14 46 49 10 45 27 29 47 0 2 45 16 37 -0.04 101 0 0 45 51 34 11 15 3.6 25 113 -15 46 32 37 45 10 32 46 43 32 44 59 38 -0.04 102 0 0 45 34 10 11 14 59.3 25 114 -15 46 15 25 44 52 56 46 26 23 44 41 59 -0.04 103 0 0 45 16 6 11 14 55.0 26 115 -16 45 57 33 44 34 41 46 8 35 44 23 40 -0.04 104 0 0 44 57 23 11 14 50.4 27 115 -16 45 39 2 44 15 45 45 50 7 44 4 41 -0.04 105 0 0 44 37 59 11 14 45.7 28 116 -17 45 19 51 43 56 8 45 31 0 43 45 0 -0.04 106 0 0 44 17 53 11 14 40.8 28 117 -18 44 59 59 43 35 49 45 11 11 43 24 38 -0.04 107 0 0 43 57 5 11 14 35.8 29 118 -18 44 39 25 43 14 48 44 50 40 43 3 33 -0.04 108 0 0 43 35 35 11 14 30.5 30 118 -19 44 18 8 42 53 4 44 29 28 42 41 45 -0.04 109 0 0 43 13 21 11 14 25.1 31 119 -19 43 56 9 42 30 36 44 7 32 42 19 14 -0.04 110 0 0 42 50 24 11 14 19.5 32 120 -20 43 33 26 42 7 24 43 44 53 41 55 58 -0.05 111 0 0 42 26 42 11 14 13.7 32 120 -21 43 9 58 41 43 27 43 21 29 41 31 57 -0.05 112 0 0 42 2 14 11 14 7.6 33 121 -21 42 45 46 41 18 44 42 57 21 41 7 10 -0.05 113 0 0 41 37 0 11 14 1.4 34 122 -22 42 20 47 40 53 15 42 32 26 40 41 37 -0.05 114 0 0 41 10 59 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30 47 24 48 29 26 44 25 24 34 54 -0.05 140 0 0 24 50 33 11 9 34.9 61 137 -41 25 42 0 23 59 11 25 55 42 23 45 31 -0.05 141 0 0 24 0 38 11 9 20.9 63 138 -41 24 52 20 23 9 0 25 6 6 22 55 17 -0.05 142 0 0 23 9 51 11 9 6.5 64 138 -42 24 1 48 22 17 58 24 15 37 22 4 11 -0.05 143 0 0 22 18 13 11 8 51.8 65 139 -43 23 10 24 21 26 6 23 24 18 21 12 15 -0.05 144 0 0 21 25 46 11 8 36.8 66 139 -43 22 18 11 20 33 25 22 32 8 20 19 30 -0.05 145 0 0 20 32 31 11 8 21.5 67 140 -44 21 25 9 19 39 56 21 39 10 19 25 58 -0.05 146 0 0 19 38 28 11 8 6.0 69 141 -45 20 31 20 18 45 41 20 45 24 18 31 39 -0.04 147 0 0 18 43 41 11 7 50.1 70 141 -45 19 36 44 17 50 41 19 50 52 17 36 36 -0.04 148 0 0 17 48 9 11 7 34.0 71 142 -46 18 41 25 16 54 58 18 55 35 16 40 50 -0.04 149 0 0 16 51 56 11 7 17.7 73 143 -47 17 45 23 15 58 34 17 59 36 15 44 22 -0.04 150 0 0 15 55 3 11 7 1.0 74 143 -47 16 48 40 15 1 30 17 2 56 14 47 16 -0.04 151 0 0 14 57 32 11 6 44.2 75 144 -48 15 51 18 14 3 49 16 5 37 13 49 32 -0.04 152 0 0 13 59 25 11 6 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53 50.5 41 305 -37 -29 53 47 -31 27 59 -29 41 16 -31 40 30 -0.01 -158 0 0 -31 18 14 10 53 41.6 40 305 -36 -30 31 25 -32 5 2 -30 18 58 -32 17 29 -0.01 -157 0 0 -31 54 40 10 53 33.0 39 305 -36 -31 8 9 -32 41 10 -30 55 46 -32 53 33 -0.02 -156 0 0 -32 30 11 10 53 24.7 38 304 -35 -31 43 58 -33 16 25 -31 31 40 -33 28 42 -0.02 -155 0 0 -33 4 49 10 53 16.7 37 304 -34 -32 18 53 -33 50 45 -32 6 40 -34 2 58 -0.02 -154 0 0 -33 38 33 10 53 8.9 36 303 -34 -32 52 54 -34 24 12 -32 40 45 -34 36 21 -0.02 -153 0 0 -34 11 24 10 53 1.4 35 303 -33 -33 26 2 -34 56 46 -33 13 58 -35 8 50 -0.02 -152 0 0 -34 43 23 10 52 54.2 34 302 -32 -33 58 18 -35 28 28 -33 46 18 -35 40 28 -0.02 -151 0 0 -35 14 30 10 52 47.2 33 301 -32 -34 29 41 -35 59 19 -34 17 46 -36 11 14 -0.02 -150 0 0 -35 44 45 10 52 40.5 32 301 -31 -35 0 13 -36 29 18 -34 48 22 -36 41 9 -0.02 -149 0 0 -36 14 10 10 52 34.1 31 300 -30 -35 29 53 -36 58 26 -35 18 7 -37 10 13 -0.02 -148 0 0 -36 42 45 10 52 27.9 30 300 -30 -35 58 44 -37 26 45 -35 47 1 -37 38 27 -0.02 -147 0 0 -37 10 29 10 52 21.9 29 299 -29 -36 26 44 -37 54 14 -36 15 6 -38 5 52 -0.02 -146 0 0 -37 37 25 10 52 16.2 28 299 -28 -36 53 55 -38 20 55 -36 42 21 -38 32 29 -0.02 -145 0 0 -38 3 33 10 52 10.6 27 298 -28 -37 20 18 -38 46 48 -37 8 48 -38 58 18 -0.02 -144 0 0 -38 28 53 10 52 5.3 26 297 -27 -37 45 53 -39 11 53 -37 34 27 -39 23 19 -0.02 -143 0 0 -38 53 26 10 52 0.3 26 297 -26 -38 10 41 -39 36 12 -37 59 18 -39 47 34 -0.02 -142 0 0 -39 17 13 10 51 55.4 25 296 -26 -38 34 41 -39 59 44 -38 23 23 -40 11 3 -0.02 -141 0 0 -39 40 14 10 51 50.7 24 296 -25 -38 57 56 -40 22 31 -38 46 41 -40 33 46 -0.02 -140 0 0 -40 2 30 10 51 46.3 23 295 -25 -39 20 26 -40 44 34 -39 9 14 -40 55 45 -0.02 -139 0 0 -40 24 2 10 51 42.0 22 294 -24 -39 42 11 -41 5 52 -39 31 3 -41 17 0 -0.02 -138 0 0 -40 44 49 10 51 37.9 21 294 -23 -40 3 11 -41 26 27 -39 52 7 -41 37 31 -0.02 -137 0 0 -41 4 54 10 51 34.0 21 293 -23 -40 23 28 -41 46 19 -40 12 27 -41 57 20 -0.02 -136 0 0 -41 24 16 10 51 30.3 20 292 -22 -40 43 2 -42 5 29 -40 32 4 -42 16 27 -0.02 -135 0 0 -41 42 56 10 51 26.7 19 292 -22 -41 1 54 -42 23 57 -40 50 59 -42 34 52 -0.02 -134 0 0 -42 0 55 10 51 23.4 18 291 -21 -41 20 4 -42 41 44 -41 9 12 -42 52 36 -0.02 -133 0 0 -42 18 12 10 51 20.2 17 290 -20 -41 37 33 -42 58 51 -41 26 44 -43 9 39 -0.02 -132 0 0 -42 34 50 10 51 17.1 17 290 -20 -41 54 21 -43 15 18 -41 43 35 -43 26 3 -0.03 -131 0 0 -42 50 48 10 51 14.2 16 289 -19 -42 10 29 -43 31 5 -41 59 46 -43 41 48 -0.03 -130 0 0 -43 6 6 10 51 11.5 15 288 -19 -42 25 58 -43 46 14 -42 15 17 -43 56 54 -0.03 -129 0 0 -43 20 46 10 51 8.9 14 288 -18 -42 40 47 -44 0 44 -42 30 9 -44 11 21 -0.03 -128 0 0 -43 34 48 10 51 6.5 14 287 -17 -42 54 58 -44 14 36 -42 44 23 -44 25 11 -0.03 -127 0 0 -43 48 11 10 51 4.2 13 286 -17 -43 8 31 -44 27 51 -42 57 58 -44 38 24 -0.03 -126 0 0 -44 0 58 10 51 2.1 12 286 -16 -43 21 26 -44 40 29 -43 10 55 -44 50 59 -0.03 -125 0 0 -44 13 8 10 51 0.1 11 285 -16 -43 33 44 -44 52 30 -43 23 15 -45 2 59 -0.03 -124 0 0 -44 24 41 10 50 58.2 11 284 -15 -43 45 25 -45 3 56 -43 34 58 -45 14 22 -0.03 -123 0 0 -44 35 38 10 50 56.5 10 284 -15 -43 56 30 -45 14 46 -43 46 5 -45 25 10 -0.03 -122 0 0 -44 46 0 10 50 54.9 9 283 -14 -44 6 58 -45 25 0 -43 56 36 -45 35 22 -0.03 -121 0 0 -44 55 46 10 50 53.4 8 282 -13 -44 16 51 -45 34 39 -44 6 30 -45 45 0 -0.03 -120 0 0 -45 4 57 10 50 52.1 8 282 -13 -44 26 9 -45 43 44 -44 15 49 -45 54 3 -0.03 -119 0 0 -45 13 33 10 50 50.9 7 281 -12 -44 34 51 -45 52 15 -44 24 33 -46 2 32 -0.03 -118 0 0 -45 21 36 10 50 49.8 6 280 -12 -44 42 59 -46 0 11 -44 32 43 -46 10 27 -0.04 -117 0 0 -45 29 4 10 50 48.8 6 279 -11 -44 50 32 -46 7 34 -44 40 17 -46 17 49 -0.04 -116 0 0 -45 35 58 10 50 47.9 5 279 -11 -44 57 31 -46 14 24 -44 47 17 -46 24 37 -0.04 -115 0 0 -45 42 18 10 50 47.2 4 278 -10 -45 3 56 -46 20 40 -44 53 44 -46 30 52 -0.04 -114 0 0 -45 48 5 10 50 46.6 3 277 -10 -45 9 47 -46 26 23 -44 59 36 -46 36 34 -0.04 -113 0 0 -45 53 19 10 50 46.1 3 277 -9 -45 15 5 -46 31 33 -45 4 54 -46 41 43 -0.04 -112 0 0 -45 58 0 10 50 45.7 2 276 -9 -45 19 49 -46 36 11 -45 9 39 -46 46 20 -0.05 -111 0 0 -46 2 8 10 50 45.5 1 275 -8 -45 24 0 -46 40 16 -45 13 51 -46 50 24 -0.06 -110 0 0 -46 5 43 10 50 45.3 1 275 -7 -45 27 37 -46 43 48 -45 17 29 -46 53 56 -0.08 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 88-00424-1 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 50 12.7840 DE: +02 39 59.396 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 50 12.7840 DE: +02 39 59.395 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (173) Ino asteroid class: approx. diameter [km]: 141 approx. diameter ["]: 0.122 distance from Earth [AU]: 1.58590 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#116 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): 0.019", 0.002", 81.01° remarks: * orbital elements for (173)Ino : Mean anomaly = 46.8132814761 deg Arg. of pericenter = 228.6529805966 deg Long. of node = 148.1354316284 deg Inclination = 14.1948269848 deg Eccentricity = 0.2100007618 Semimajor axis = 2.7420681311 AU Perihelion dist = 2.1662317348 AU Mag: H = 8.00, G = 0.01 Epoch of elements : MJD 60316.46075950 TDT (2024 Jan 07.4608) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1162023Apr27,16.89,2024,1,7,11.058185,0.024723,0.022313,-3.148787,3.489131,0.003086,0.002018,0.000001,0.000000 160.4783,2.7077,15.64,-22.40,False TYC 88-00424-1,4.83688447,2.6664989,12.30,11.80,11.53,0.0,0,,4.85802447,2.7076754,0.73,0.65,0,0,0 173,Ino,11.76,140.636,1.5859,0,0,-1.164,19.35,,9.0,0 0,46.7133,2024,1,7,228.6530,148.1354,14.1948,0.21000,2.74207,2.16623,8.00,5.0,0.15 1.133,0.0193,0.0025,81,0.0163,Known errors,1.15,0,-1,-1 20240107_0424-1,60137.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org