IOTA/IOTA-ES occultation update for (297) Caecilia / TYC 5550-00043-1 event on 2024 Jan 05, 01:15 UT Visible from Summary ------- On 2024 Jan 05 UT, the 39.571 km diameter asteroid (297) Caecilia will occult a 11.4 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 4.09 mag to 15.46 mag (the magnitude of the asteroid) for at most 2.000 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 05, 01:10 - 2024 Jan 05, 01:20 * geocentric midpoint of event [JD]: 2460314.55228633 * magnitude of target star: 11.40 * magnitude drop [mag]: 4.09 * estimated maximum duration [s]: 2.000 * Moon: 41 % sunlit, 5° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 42 * 1 sigma uncertainty interval [path widths]: +/- 0.18 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.003", 119°) * approx speed of asteroid's shadow [km/s]: 19.8244 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5550-00043-1 by 297 Caecilia on 2024 Jan 5 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 4 0 0 50 8 45 1 10 15.0 0 110 -58 49 56 41 50 20 50 49 52 25 50 25 7 .... 5 0 0 49 54 7 1 10 15.0 1 111 -58 49 42 0 50 6 14 49 37 43 50 10 33 -0.09 6 0 0 49 39 0 1 10 15.1 2 112 -58 49 26 51 49 51 10 49 22 32 49 55 29 -0.20 7 0 0 49 23 23 1 10 15.3 2 113 -58 49 11 11 49 35 36 49 6 52 49 39 56 -0.24 8 0 0 49 7 17 1 10 15.5 3 114 -57 48 55 2 49 19 32 48 50 42 49 23 53 -0.27 9 0 0 48 50 40 1 10 15.7 4 114 -57 48 38 23 49 2 58 48 34 2 49 7 20 -0.28 10 0 0 48 33 34 1 10 16.0 4 115 -57 48 21 14 48 45 55 48 16 52 48 50 18 -0.29 11 0 0 48 15 56 1 10 16.4 5 116 -56 48 3 34 48 28 20 47 59 11 48 32 44 -0.30 12 0 0 47 57 48 1 10 16.8 6 117 -56 47 45 22 48 10 14 47 40 58 48 14 39 -0.30 13 0 0 47 39 8 1 10 17.3 7 117 -56 47 26 40 47 51 37 47 22 14 47 56 3 -0.31 14 0 0 47 19 56 1 10 17.8 7 118 -55 47 7 25 47 32 28 47 2 58 47 36 56 -0.31 15 0 0 47 0 12 1 10 18.4 8 119 -55 46 47 38 47 12 48 46 43 11 47 17 16 -0.31 16 0 0 46 39 56 1 10 19.1 9 119 -55 46 27 18 46 52 34 46 22 50 46 57 3 -0.32 17 0 0 46 19 7 1 10 19.8 10 120 -54 46 6 26 46 31 48 46 1 57 46 36 18 -0.32 18 0 0 45 57 44 1 10 20.6 10 121 -54 45 45 1 46 10 29 45 40 30 46 15 0 -0.32 19 0 0 45 35 48 1 10 21.5 11 122 -53 45 23 2 45 48 36 45 18 30 45 53 8 -0.32 20 0 0 45 13 18 1 10 22.5 12 122 -53 45 0 29 45 26 9 44 55 56 45 30 43 -0.32 21 0 0 44 50 15 1 10 23.5 13 123 -52 44 37 22 45 3 9 44 32 48 45 7 43 -0.32 22 0 0 44 26 36 1 10 24.6 14 124 -52 44 13 40 44 39 34 44 9 5 44 44 10 -0.32 23 0 0 44 2 23 1 10 25.8 15 125 -51 43 49 24 44 15 24 43 44 48 44 20 1 -0.32 24 0 0 43 37 36 1 10 27.1 15 125 -51 43 24 33 43 50 39 43 19 56 43 55 18 -0.33 25 0 0 43 12 13 1 10 28.5 16 126 -50 42 59 7 43 25 20 42 54 29 43 29 59 -0.33 26 0 0 42 46 14 1 10 29.9 17 127 -50 42 33 6 42 59 24 42 28 26 43 4 5 -0.33 27 0 0 42 19 41 1 10 31.4 18 127 -49 42 6 29 42 32 54 42 1 48 42 37 36 -0.33 28 0 0 41 52 31 1 10 33.1 19 128 -48 41 39 16 42 5 48 41 34 34 42 10 30 -0.33 29 0 0 41 24 46 1 10 34.8 20 129 -48 41 11 27 41 38 5 41 6 44 41 42 49 -0.33 30 0 0 40 56 25 1 10 36.6 21 130 -47 40 43 3 41 9 47 40 38 19 41 14 32 -0.33 31 0 0 40 27 27 1 10 38.5 21 130 -46 40 14 3 40 40 53 40 9 17 40 45 40 -0.33 32 0 0 39 57 54 1 10 40.6 22 131 -46 39 44 26 40 11 23 39 39 40 40 16 10 -0.33 33 0 0 39 27 45 1 10 42.7 23 132 -45 39 14 14 39 41 17 39 9 27 39 46 5 -0.33 34 0 0 38 57 0 1 10 44.9 24 132 -44 38 43 26 39 10 35 38 38 38 39 15 24 -0.33 35 0 0 38 25 39 1 10 47.3 25 133 -44 38 12 2 38 39 17 38 7 13 38 44 8 -0.33 36 0 0 37 53 42 1 10 49.7 26 134 -43 37 40 3 38 7 23 37 35 12 38 12 15 -0.33 37 0 0 37 21 10 1 10 52.3 27 134 -42 37 7 28 37 34 54 37 2 36 37 39 47 -0.33 38 0 0 36 48 3 1 10 55.0 28 135 -41 36 34 18 37 1 50 36 29 25 37 6 43 -0.33 39 0 0 36 14 21 1 10 57.8 29 136 -40 36 0 33 36 28 10 35 55 39 36 33 5 -0.33 40 0 0 35 40 4 1 11 0.7 30 137 -40 35 26 14 35 53 56 35 21 19 35 58 52 -0.33 41 0 0 35 5 13 1 11 3.7 31 137 -39 34 51 20 35 19 8 34 46 25 35 24 5 -0.33 42 0 0 34 29 49 1 11 6.9 32 138 -38 34 15 53 34 43 46 34 10 57 34 48 43 -0.33 43 0 0 33 53 51 1 11 10.1 33 139 -37 33 39 53 34 7 51 33 34 56 34 12 49 -0.33 44 0 0 33 17 21 1 11 13.6 34 139 -36 33 3 21 33 31 23 32 58 23 33 36 22 -0.33 45 0 0 32 40 20 1 11 17.1 35 140 -35 32 26 17 32 54 24 32 21 18 32 59 23 -0.33 46 0 0 32 2 47 1 11 20.7 36 141 -34 31 48 42 32 16 53 31 43 43 32 21 53 -0.33 47 0 0 31 24 43 1 11 24.5 37 142 -33 31 10 37 31 38 51 31 5 37 31 43 53 -0.33 48 0 0 30 46 11 1 11 28.4 38 142 -32 30 32 3 31 0 21 30 27 2 31 5 23 -0.34 49 0 0 30 7 10 1 11 32.5 39 143 -31 29 53 0 30 21 21 29 47 59 30 26 24 -0.34 50 0 0 29 27 42 1 11 36.7 40 144 -30 29 13 30 29 41 55 29 8 28 29 46 58 -0.34 51 0 0 28 47 47 1 11 41.0 41 145 -29 28 33 34 29 2 1 28 28 32 29 7 5 -0.34 52 0 0 28 7 27 1 11 45.4 42 145 -28 27 53 13 28 21 43 27 48 10 28 26 46 -0.34 53 0 0 27 26 43 1 11 49.9 43 146 -27 27 12 28 27 41 0 27 7 25 27 46 4 -0.34 54 0 0 26 45 37 1 11 54.6 44 147 -26 26 31 20 26 59 54 26 26 17 27 4 59 -0.34 55 0 0 26 4 9 1 11 59.4 45 148 -25 25 49 52 26 18 27 25 44 48 26 23 32 -0.34 56 0 0 25 22 21 1 12 4.4 47 149 -24 25 8 3 25 36 40 25 2 59 25 41 46 -0.34 57 0 0 24 40 15 1 12 9.4 48 150 -23 24 25 57 24 54 35 24 20 52 24 59 40 -0.34 58 0 0 23 57 52 1 12 14.6 49 151 -22 23 43 33 24 12 12 23 38 29 24 17 17 -0.34 59 0 0 23 15 13 1 12 19.9 50 152 -21 23 0 55 23 29 34 22 55 50 23 34 39 -0.34 60 0 0 22 32 21 1 12 25.3 51 153 -20 22 18 2 22 46 42 22 12 58 22 51 47 -0.34 61 0 0 21 49 17 1 12 30.8 52 154 -19 21 34 58 22 3 37 21 29 54 22 8 43 -0.34 62 0 0 21 6 2 1 12 36.4 53 155 -18 20 51 44 21 20 22 20 46 40 21 25 28 -0.34 63 0 0 20 22 39 1 12 42.1 54 156 -17 20 8 21 20 36 59 20 3 17 20 42 4 -0.34 64 0 0 19 39 9 1 12 48.0 55 157 -15 19 24 52 19 53 28 19 19 48 19 58 33 -0.34 65 0 0 18 55 34 1 12 53.9 56 158 -14 18 41 17 19 9 52 18 36 14 19 14 57 -0.34 66 0 0 18 11 55 1 12 59.9 57 160 -13 17 57 40 18 26 12 17 52 37 18 31 17 -0.34 67 0 0 17 28 15 1 13 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-0.43 168 0 0 -12 48 16 1 20 21.2 0 257 78 -12 59 54 -12 36 36 -13 4 2 -12 32 28 -0.73 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 5550-00043-1 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 16 56.8883 DE: -12 43 56.014 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 16 56.8885 DE: -12 43 56.016 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.4 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (297) Caecilia asteroid class: approx. diameter [km]: 40 approx. diameter ["]: 0.016 distance from Earth [AU]: 3.48110 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.018", 0.003", 119.068° remarks: * orbital elements for (297)Caecilia : Mean anomaly = 232.2576835246 deg Arg. of pericenter = 353.6357423812 deg Long. of node = 331.8908557242 deg Inclination = 7.5497604786 deg Eccentricity = 0.1388751152 Semimajor axis = 3.1684209968 AU Perihelion dist = 2.7284061658 AU Mag: H = 9.17, G = 0.15 Epoch of elements : MJD 60314.05228633 TDT (2024 Jan 05.0523) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,2.00,2024,1,5,1.254872,0.177272,0.280850,9.448123,-5.994732,-0.005605,0.002197,0.000000,0.000000 76.5837,-12.8578,162.42,-22.68,False TYC 5550-00043-1,13.28246896,-12.7322261,11.73,11.40,11.22,0.0,0,,13.30347488,-12.8577516,4.08,3.82,0,0,0 297,Caecilia,15.46,39.571,3.4811,0,0,1.633,-15.15,,2.2,0 0,232.0738,2024,1,4,353.6357,331.8909,7.5498,0.13888,3.16842,2.72841,9.17,5.0,0.15 1.177,0.0183,0.0026,119,0.0028,Known errors,0.95,0,-1,-1 20240105_0043-1,60137.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org