IOTA/IOTA-ES occultation update for (5454) Kojiki / UCAC4 317-221462 event on 2024 Mar 12, 03:27 UT Visible from Summary ------- On 2024 Mar 12 UT, the 16.771 km diameter asteroid (5454) Kojiki will occult a 12.0 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.21 mag to 19.18 mag (the magnitude of the asteroid) for at most 0.590 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: 97 * date and approx. time of event: 2024 Mar 12, 03:23 - 2024 Mar 12, 03:31 * geocentric midpoint of event [JD]: 2460381.64404146 * magnitude of target star: 11.97 * magnitude drop [mag]: 7.21 * estimated maximum duration [s]: 0.590 * Moon: 5 % sunlit, 89° distance * Sun: 64° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 79°) * approx speed of asteroid's shadow [km/s]: 28.2177 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 317-221462 by 5454 Kojiki on 2024 Mar 12 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 - 18 0 0 3 52 7 3 23 42.9 1 117 -60 3 46 57 3 57 17 3 43 4 4 1 10 .... - 17 0 0 3 22 0 3 23 43.1 2 117 -59 3 16 51 3 27 10 3 12 58 3 31 3 -0.06 - 16 0 0 2 52 4 3 23 43.3 3 117 -58 2 46 55 2 57 13 2 43 2 3 1 6 -0.10 - 15 0 0 2 22 18 3 23 43.6 4 117 -57 2 17 10 2 27 27 2 13 18 2 31 20 -0.12 - 14 0 0 1 52 44 3 23 44.0 5 117 -56 1 47 36 1 57 53 1 43 44 2 1 45 -0.13 - 13 0 0 1 23 23 3 23 44.4 7 117 -54 1 18 15 1 28 31 1 14 23 1 32 23 -0.14 - 12 0 0 0 54 14 3 23 45.0 8 117 -53 0 49 7 0 59 22 0 45 16 1 3 13 -0.14 - 11 0 0 0 25 20 3 23 45.6 9 117 -52 0 20 13 0 30 27 0 16 22 0 34 18 -0.15 - 10 0 0 - 0 3 20 3 23 46.3 10 117 -51 - 0 8 27 0 1 47 - 0 12 17 0 5 37 -0.15 - 9 0 0 - 0 31 45 3 23 47.2 11 117 -50 - 0 36 51 - 0 26 39 - 0 40 41 - 0 22 49 -0.15 - 8 0 0 - 0 59 53 3 23 48.0 12 117 -49 - 1 4 59 - 0 54 48 - 1 8 49 - 0 50 58 -0.16 - 7 0 0 - 1 27 45 3 23 49.0 13 117 -48 - 1 32 51 - 1 22 40 - 1 36 40 - 1 18 51 -0.16 - 6 0 0 - 1 55 20 3 23 50.1 14 117 -47 - 2 0 25 - 1 50 16 - 2 4 13 - 1 46 27 -0.16 - 5 0 0 - 2 22 37 3 23 51.2 15 117 -46 - 2 27 41 - 2 17 33 - 2 31 29 - 2 13 44 -0.16 - 4 0 0 - 2 49 35 3 23 52.4 17 117 -45 - 2 54 38 - 2 44 32 - 2 58 26 - 2 40 43 -0.16 - 3 0 0 - 3 16 14 3 23 53.7 18 117 -44 - 3 21 17 - 3 11 11 - 3 25 4 - 3 7 23 -0.16 - 2 0 0 - 3 42 33 3 23 55.1 19 117 -43 - 3 47 35 - 3 37 31 - 3 51 22 - 3 33 44 -0.17 - 1 0 0 - 4 8 32 3 23 56.5 20 117 -42 - 4 13 34 - 4 3 30 - 4 17 20 - 3 59 44 -0.17 - 0 0 0 - 4 34 10 3 23 58.1 21 117 -41 - 4 39 11 - 4 29 9 - 4 42 57 - 4 25 23 -0.17 1 0 0 - 4 59 27 3 23 59.6 22 117 -40 - 5 4 27 - 4 54 26 - 5 8 13 - 4 50 41 -0.17 2 0 0 - 5 24 22 3 24 1.3 23 117 -39 - 5 29 22 - 5 19 22 - 5 33 7 - 5 15 37 -0.17 3 0 0 - 5 48 54 3 24 3.1 24 117 -38 - 5 53 54 - 5 43 55 - 5 57 38 - 5 40 10 -0.17 4 0 0 - 6 13 4 3 24 4.9 25 117 -37 - 6 18 3 - 6 8 6 - 6 21 47 - 6 4 21 -0.17 5 0 0 - 6 36 51 3 24 6.7 26 117 -36 - 6 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13 -0.18 30 0 0 -14 11 10 3 25 11.9 52 115 -10 -14 15 53 -14 6 26 -14 19 26 -14 2 53 -0.18 31 0 0 -14 23 21 3 25 15.1 53 115 -9 -14 28 4 -14 18 38 -14 31 37 -14 15 5 -0.18 32 0 0 -14 35 4 3 25 18.4 54 116 -8 -14 39 46 -14 30 21 -14 43 19 -14 26 49 -0.18 33 0 0 -14 46 18 3 25 21.6 55 116 -7 -14 51 0 -14 41 36 -14 54 32 -14 38 4 -0.18 34 0 0 -14 57 4 3 25 24.9 56 116 -6 -15 1 45 -14 52 22 -15 5 17 -14 48 50 -0.18 35 0 0 -15 7 20 3 25 28.2 57 116 -5 -15 12 2 -15 2 39 -15 15 33 -14 59 7 -0.18 36 0 0 -15 17 8 3 25 31.6 58 116 -4 -15 21 49 -15 12 27 -15 25 20 -15 8 56 -0.18 37 0 0 -15 26 27 3 25 34.9 59 116 -3 -15 31 8 -15 21 47 -15 34 39 -15 18 16 -0.18 38 0 0 -15 35 18 3 25 38.3 60 117 -2 -15 39 58 -15 30 37 -15 43 29 -15 27 7 -0.18 39 0 0 -15 43 39 3 25 41.8 60 117 -1 -15 48 19 -15 38 59 -15 51 49 -15 35 29 -0.18 40 0 0 -15 51 32 3 25 45.2 61 117 0 -15 56 12 -15 46 52 -15 59 42 -15 43 22 -0.18 41 0 0 -15 58 56 3 25 48.7 62 117 1 -16 3 35 -15 54 16 -16 7 5 -15 50 46 -0.18 42 0 0 -16 5 51 3 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0 0 3 40 16 3 30 49.1 23 239 83 3 35 6 3 45 27 3 31 13 3 49 20 -0.17 130 0 0 4 10 41 3 30 50.8 22 239 83 4 5 30 4 15 52 4 1 37 4 19 45 -0.17 131 0 0 4 41 14 3 30 52.4 21 239 82 4 36 3 4 46 25 4 32 10 4 50 19 -0.17 132 0 0 5 11 56 3 30 54.0 20 239 81 5 6 44 5 17 7 5 2 50 5 21 1 -0.17 133 0 0 5 42 44 3 30 55.5 19 239 81 5 37 33 5 47 56 5 33 38 5 51 50 -0.17 134 0 0 6 13 39 3 30 56.9 17 240 80 6 8 27 6 18 51 6 4 33 6 22 45 -0.17 135 0 0 6 44 39 3 30 58.2 16 240 79 6 39 27 6 49 51 6 35 32 6 53 46 -0.17 136 0 0 7 15 44 3 30 59.4 15 240 78 7 10 31 7 20 56 7 6 37 7 24 51 -0.17 137 0 0 7 46 52 3 31 0.6 14 240 77 7 41 39 7 52 4 7 37 44 7 55 59 -0.17 138 0 0 8 18 2 3 31 1.6 13 240 76 8 12 50 8 23 15 8 8 55 8 27 10 -0.17 139 0 0 8 49 15 3 31 2.6 12 240 75 8 44 2 8 54 28 8 40 7 8 58 23 -0.17 140 0 0 9 20 28 3 31 3.5 11 240 74 9 15 16 9 25 41 9 11 21 9 29 37 -0.17 141 0 0 9 51 42 3 31 4.3 10 241 73 9 46 29 9 56 55 9 42 34 10 0 50 -0.17 142 0 0 10 22 54 3 31 5.0 9 241 72 10 17 41 10 28 8 10 13 46 10 32 3 -0.17 143 0 0 10 54 5 3 31 5.6 7 241 71 10 48 52 10 59 18 10 44 57 11 3 14 -0.17 144 0 0 11 25 13 3 31 6.1 6 241 70 11 20 0 11 30 26 11 16 5 11 34 22 -0.17 145 0 0 11 56 18 3 31 6.5 5 241 69 11 51 5 12 1 31 11 47 9 12 5 26 -0.16 146 0 0 12 27 18 3 31 6.9 4 242 68 12 22 5 12 32 31 12 18 9 12 36 26 -0.16 147 0 0 12 58 12 3 31 7.2 3 242 66 12 52 59 13 3 25 12 49 4 13 7 21 -0.16 148 0 0 13 29 1 3 31 7.4 2 242 65 13 23 48 13 34 14 13 19 53 13 38 9 -0.14 149 0 0 13 59 42 3 31 7.5 1 242 64 13 54 30 14 4 55 13 50 35 14 8 50 -0.10 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 317-221462 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 19 02.9316 DE: -26 40 43.422 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 19 02.9317 DE: -26 40 43.421 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5454) Kojiki asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.83300 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 date of fit: 2023 Apr 25 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): 0.017", 0.002", 78.8° remarks: * orbital elements for (5454)Kojiki : Mean anomaly = 214.7743875160 deg Arg. of pericenter = 89.5541185466 deg Long. of node = 335.8959607249 deg Inclination = 5.4307939285 deg Eccentricity = 0.1299169307 Semimajor axis = 3.1631252222 AU Perihelion dist = 2.7521817019 AU Mag: H = 12.71, G = 0.15 Epoch of elements : MJD 60381.14404125 TDT (2024 Mar 12.1440) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr25,0.59,2024,3,12,3.456995,-0.017799,0.179858,15.850760,1.555176,-0.005323,-0.000941,-0.000001,0.000000 68.0026,-26.6354,130.57,-3.15,False UCAC4 317-221462,19.31748096,-26.6787283,12.40,11.97,11.74,0.0,0,K,19.34212517,-26.6353574,7.21,7.00,0,0,0 5454,Kojiki,19.18,16.771,3.8330,0,0,2.712,3.57,,1.6,0 0,214.7492,2024,3,12,89.5541,335.8960,5.4308,0.12992,3.16313,2.75218,12.71,5.0,0.15 1.376,0.0167,0.0016,79,0.0023,Known errors,0.94,0,-1,-1 20240312_221462,60139.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org