IOTA/IOTA-ES occultation update for (2396) Kochi / UCAC4 371-151747 event on 2024 Oct 24, 08:13 UT Visible from Summary ------- On 2024 Oct 24 UT, the 10.5058936385826 km diameter asteroid (2396) Kochi will occult a 11.8 mag star in the constellation Scutum for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.46 mag to 17.21 mag (the magnitude of the asteroid) for at most 0.390 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 Oct 24, 08:10 - 2024 Oct 24, 08:17 * geocentric midpoint of event [JD]: 2460607.84303946 * magnitude of target star: 11.76 * magnitude drop [mag]: 5.46 * estimated maximum duration [s]: 0.390 * Moon: 50 % sunlit, 158° distance * Sun: 72° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.26 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 93°) * approx speed of asteroid's shadow [km/s]: 27.5315 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 371-151747 by 2396 Kochi on 2024 Oct 24 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 29 0 0 -29 18 46 8 10 54.4 0 108 62 -29 22 37 -29 14 55 -29 24 39 -29 12 54 .... 30 0 0 -29 36 12 8 10 54.4 1 107 62 -29 40 4 -29 32 21 -29 42 5 -29 30 20 0.61 31 0 0 -29 53 48 8 10 54.6 2 107 63 -29 57 40 -29 49 57 -29 59 42 -29 47 55 0.67 32 0 0 -30 11 34 8 10 54.8 3 106 63 -30 15 26 -30 7 42 -30 17 28 -30 5 40 0.70 33 0 0 -30 29 28 8 10 55.1 4 106 64 -30 33 21 -30 25 36 -30 35 23 -30 23 34 0.72 34 0 0 -30 47 31 8 10 55.5 5 105 64 -30 51 24 -30 43 39 -30 53 26 -30 41 37 0.73 35 0 0 -31 5 42 8 10 55.9 6 105 64 -31 9 35 -31 1 49 -31 11 38 -30 59 48 0.73 36 0 0 -31 24 1 8 10 56.5 7 104 65 -31 27 54 -31 20 8 -31 29 57 -31 18 6 0.74 37 0 0 -31 42 27 8 10 57.0 8 104 65 -31 46 20 -31 38 34 -31 48 23 -31 36 31 0.74 38 0 0 -32 0 59 8 10 57.7 9 103 66 -32 4 53 -31 57 6 -32 6 56 -31 55 4 0.74 39 0 0 -32 19 38 8 10 58.4 10 103 66 -32 23 32 -32 15 44 -32 25 35 -32 13 42 0.75 40 0 0 -32 38 23 8 10 59.2 10 102 66 -32 42 17 -32 34 29 -32 44 20 -32 32 26 0.75 41 0 0 -32 57 12 8 11 0.1 11 102 66 -33 1 7 -32 53 18 -33 3 10 -32 51 16 0.75 42 0 0 -33 16 7 8 11 1.0 12 101 66 -33 20 2 -33 12 12 -33 22 5 -33 10 10 0.75 43 0 0 -33 35 6 8 11 2.0 13 100 66 -33 39 1 -33 31 11 -33 41 4 -33 29 8 0.75 44 0 0 -33 54 8 8 11 3.1 14 100 67 -33 58 3 -33 50 13 -34 0 7 -33 48 10 0.75 45 0 0 -34 13 14 8 11 4.2 15 99 67 -34 17 9 -34 9 19 -34 19 13 -34 7 16 0.75 46 0 0 -34 32 23 8 11 5.4 16 99 67 -34 36 18 -34 28 28 -34 38 22 -34 26 25 0.75 47 0 0 -34 51 34 8 11 6.7 17 98 66 -34 55 30 -34 47 39 -34 57 33 -34 45 36 0.76 48 0 0 -35 10 47 8 11 8.0 17 97 66 -35 14 43 -35 6 52 -35 16 47 -35 4 48 0.76 49 0 0 -35 30 2 8 11 9.4 18 97 66 -35 33 57 -35 26 6 -35 36 1 -35 24 2 0.76 50 0 0 -35 49 17 8 11 10.8 19 96 66 -35 53 13 -35 45 21 -35 55 17 -35 43 18 0.76 51 0 0 -36 8 32 8 11 12.3 20 95 66 -36 12 29 -36 4 36 -36 14 32 -36 2 33 0.76 52 0 0 -36 27 48 8 11 13.9 21 95 66 -36 31 44 -36 23 52 -36 33 48 -36 21 48 0.76 53 0 0 -36 47 3 8 11 15.5 22 94 65 -36 50 59 -36 43 7 -36 53 3 -36 41 3 0.76 54 0 0 -37 6 17 8 11 17.2 22 93 65 -37 10 13 -37 2 21 -37 12 17 -37 0 17 0.76 55 0 0 -37 25 29 8 11 18.9 23 93 65 -37 29 26 -37 21 33 -37 31 30 -37 19 29 0.76 56 0 0 -37 44 40 8 11 20.6 24 92 64 -37 48 36 -37 40 43 -37 50 40 -37 38 40 0.76 57 0 0 -38 3 48 8 11 22.4 25 91 64 -38 7 44 -37 59 51 -38 9 48 -37 57 48 0.76 58 0 0 -38 22 53 8 11 24.3 26 90 63 -38 26 50 -38 18 56 -38 28 54 -38 16 53 0.76 59 0 0 -38 41 55 8 11 26.2 26 89 63 -38 45 51 -38 37 58 -38 47 55 -38 35 54 0.76 60 0 0 -39 0 52 8 11 28.2 27 89 62 -39 4 49 -38 56 56 -39 6 53 -38 54 52 0.76 61 0 0 -39 19 46 8 11 30.2 28 88 62 -39 23 43 -39 15 49 -39 25 47 -39 13 46 0.76 62 0 0 -39 38 35 8 11 32.2 29 87 61 -39 42 32 -39 34 38 -39 44 36 -39 32 35 0.76 63 0 0 -39 57 19 8 11 34.3 30 86 61 -40 1 15 -39 53 22 -40 3 19 -39 51 18 0.76 64 0 0 -40 15 57 8 11 36.4 30 85 60 -40 19 53 -40 12 0 -40 21 57 -40 9 57 0.76 65 0 0 -40 34 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261 -29 -47 10 4 -47 2 20 -47 12 6 -47 0 18 0.79 -146 0 0 -46 51 39 8 16 55.5 13 260 -29 -46 55 31 -46 47 46 -46 57 33 -46 45 45 0.80 -145 0 0 -46 36 54 8 16 56.3 12 260 -30 -46 40 47 -46 33 1 -46 42 49 -46 30 59 0.80 -144 0 0 -46 21 56 8 16 57.1 11 259 -30 -46 25 49 -46 18 3 -46 27 52 -46 16 1 0.80 -143 0 0 -46 6 47 8 16 57.8 11 258 -31 -46 10 40 -46 2 53 -46 12 42 -46 0 51 0.80 -142 0 0 -45 51 25 8 16 58.5 10 257 -31 -45 55 19 -45 47 32 -45 57 21 -45 45 30 0.81 -141 0 0 -45 35 52 8 16 59.1 9 257 -31 -45 39 46 -45 31 59 -45 41 49 -45 29 56 0.81 -140 0 0 -45 20 8 8 16 59.7 8 256 -32 -45 24 2 -45 16 14 -45 26 5 -45 14 12 0.82 -139 0 0 -45 4 12 8 17 0.2 8 255 -32 -45 8 7 -45 0 18 -45 10 10 -44 58 16 0.82 -138 0 0 -44 48 6 8 17 0.7 7 255 -33 -44 52 0 -44 44 12 -44 54 3 -44 42 9 0.83 -137 0 0 -44 31 49 8 17 1.2 6 254 -33 -44 35 43 -44 27 54 -44 37 46 -44 25 51 0.84 -136 0 0 -44 15 21 8 17 1.6 5 253 -33 -44 19 16 -44 11 26 -44 21 19 -44 9 23 0.85 -135 0 0 -43 58 43 8 17 1.9 5 252 -34 -44 2 38 -43 54 48 -44 4 41 -43 52 45 0.86 -134 0 0 -43 41 55 8 17 2.2 4 252 -34 -43 45 50 -43 38 0 -43 47 53 -43 35 57 0.88 -133 0 0 -43 24 57 8 17 2.4 3 251 -35 -43 28 53 -43 21 2 -43 30 56 -43 18 59 0.92 -132 0 0 -43 7 50 8 17 2.6 2 250 -35 -43 11 46 -43 3 55 -43 13 49 -43 1 52 0.97 -131 0 0 -42 50 34 8 17 2.8 1 250 -35 -42 54 30 -42 46 38 -42 56 33 -42 44 35 1.09 -130 0 0 -42 33 9 8 17 2.8 1 249 -36 -42 37 5 -42 29 13 -42 39 9 -42 27 10 1.50 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 371-151747 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 52 28.9684 DE: -15 48 28.507 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 52 28.9683 DE: -15 48 28.507 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 13.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2396) Kochi asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.005 distance from Earth [AU]: 2.93830 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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): 0.011", 0.001", 92.683° remarks: * orbital elements for (2396)Kochi : Mean anomaly = 85.2552352116 deg Arg. of pericenter = 50.0796157288 deg Long. of node = 158.2996671902 deg Inclination = 12.6021178989 deg Eccentricity = 0.0728481741 Semimajor axis = 2.7941754481 AU Perihelion dist = 2.5906248687 AU Mag: H = 11.66, G = 0.15 Epoch of elements : MJD 60607.34303917 TDT (2024 Oct 24.3430) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,0.39,2024,10,24,8.232947,-0.073556,-0.599775,15.425337,-1.880635,0.005485,0.000734,0.000000,0.000000 126.7525,-15.7782,52.54,-11.97,False UCAC4 371-151747,18.87471347,-15.8079185,12.96,11.76,11.11,0.1,0,,18.89827195,-15.7782285,5.46,5.66,0,0,0 2396,Kochi,17.21,10.719,2.9383,0,0,3.199,-5.63,,1.0,0 0,85.1828,2024,10,24,50.0796,158.2997,12.6021,0.07285,2.79418,2.59062,11.65,5.0,0.15 1.262,0.0107,0.0011,93,0.0013,Known errors,0.84,0,-1,-1 20241024_151747,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org