IOTA/IOTA-ES occultation update for (1378) Leonce / UCAC4 332-081321 event on 2024 Oct 12, 21:11 UT Visible from Summary ------- On 2024 Oct 12 UT, the 20.3497948117907 km diameter asteroid (1378) Leonce will occult a 11.3 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.59 mag to 16.92 mag (the magnitude of the asteroid) for at most 0.500 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 12, 21:09 - 2024 Oct 12, 21:14 * geocentric midpoint of event [JD]: 2460596.38319000 * magnitude of target star: 11.34 * magnitude drop [mag]: 5.59 * estimated maximum duration [s]: 0.500 * Moon: 72 % sunlit, 67° distance * Sun: 49° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 103°) * approx speed of asteroid's shadow [km/s]: 41.1428 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 332-081321 by 1378 Leonce on 2024 Oct 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 -172 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 22 33 16 .. .. .. .... -171 0 0 22 15 32 21 9 17.9 1 116 48 22 9 7 22 21 56 22 6 4 22 25 0 .... -170 0 0 21 48 6 21 9 18.0 2 117 49 21 41 42 21 54 31 21 38 38 21 57 35 -0.12 -169 0 0 21 20 29 21 9 18.1 3 117 50 21 14 4 21 26 54 21 11 0 21 29 58 -0.17 -168 0 0 20 52 40 21 9 18.3 4 117 51 20 46 14 20 59 6 20 43 11 21 2 10 -0.19 -167 0 0 20 24 40 21 9 18.5 5 118 52 20 18 14 20 31 6 20 15 10 20 34 10 -0.21 -166 0 0 19 56 30 21 9 18.8 6 118 53 19 50 4 20 2 56 19 46 59 20 6 0 -0.22 -165 0 0 19 28 10 21 9 19.2 7 118 54 19 21 43 19 34 36 19 18 39 19 37 41 -0.22 -164 0 0 18 59 41 21 9 19.6 8 119 55 18 53 14 19 6 7 18 50 10 19 9 12 -0.23 -163 0 0 18 31 4 21 9 20.0 9 119 56 18 24 37 18 37 30 18 21 33 18 40 35 -0.23 -162 0 0 18 2 19 21 9 20.5 10 119 57 17 55 53 18 8 46 17 52 48 18 11 51 -0.24 -161 0 0 17 33 28 21 9 21.1 11 120 58 17 27 1 17 39 55 17 23 57 17 43 0 -0.24 -160 0 0 17 4 31 21 9 21.7 13 120 59 16 58 4 17 10 58 16 55 0 17 14 3 -0.24 -159 0 0 16 35 28 21 9 22.4 14 120 60 16 29 2 16 41 55 16 25 57 16 45 0 -0.24 -158 0 0 16 6 22 21 9 23.1 15 121 61 15 59 55 16 12 49 15 56 50 16 15 53 -0.24 -157 0 0 15 37 11 21 9 23.9 16 121 62 15 30 44 15 43 38 15 27 40 15 46 43 -0.25 -156 0 0 15 7 58 21 9 24.8 17 121 63 15 1 31 15 14 25 14 58 27 15 17 30 -0.25 -155 0 0 14 38 43 21 9 25.7 18 122 64 14 32 16 14 45 9 14 29 12 14 48 14 -0.25 -154 0 0 14 9 26 21 9 26.7 19 122 64 14 3 0 14 15 53 13 59 55 14 18 57 -0.25 -153 0 0 13 40 9 21 9 27.7 20 122 65 13 33 43 13 46 36 13 30 38 13 49 40 -0.25 -152 0 0 13 10 53 21 9 28.7 21 122 66 13 4 26 13 17 19 13 1 22 13 20 23 -0.25 -151 0 0 12 41 37 21 9 29.9 22 123 67 12 35 11 12 48 3 12 32 7 12 51 8 -0.25 -150 0 0 12 12 24 21 9 31.1 23 123 68 12 5 58 12 18 50 12 2 54 12 21 54 -0.25 -149 0 0 11 43 14 21 9 32.3 24 123 69 11 36 48 11 49 39 11 33 44 11 52 43 -0.25 -148 0 0 11 14 7 21 9 33.6 26 123 70 11 7 42 11 20 32 11 4 38 11 23 36 -0.25 -147 0 0 10 45 5 21 9 35.0 27 124 70 10 38 40 10 51 30 10 35 36 10 54 33 -0.25 -146 0 0 10 16 8 21 9 36.4 28 124 71 10 9 43 10 22 32 10 6 40 10 25 36 -0.26 -145 0 0 9 47 17 21 9 37.8 29 124 72 9 40 53 9 53 41 9 37 50 9 56 45 -0.26 -144 0 0 9 18 33 21 9 39.3 30 124 73 9 12 9 9 24 57 9 9 6 9 28 0 -0.26 -143 0 0 8 49 57 21 9 40.9 31 125 73 8 43 34 8 56 20 8 40 31 8 59 23 -0.26 -142 0 0 8 21 29 21 9 42.5 32 125 74 8 15 6 8 27 52 8 12 4 8 30 55 -0.26 -141 0 0 7 53 11 21 9 44.2 33 125 74 7 46 48 7 59 33 7 43 46 8 2 36 -0.26 -140 0 0 7 25 2 21 9 45.9 34 126 75 7 18 41 7 31 24 7 15 38 7 34 27 -0.26 -139 0 0 6 57 5 21 9 47.6 35 126 75 6 50 43 7 3 26 6 47 42 7 6 29 -0.26 -138 0 0 6 29 19 21 9 49.4 36 126 75 6 22 58 6 35 40 6 19 56 6 38 42 -0.26 -137 0 0 6 1 45 21 9 51.3 37 126 76 5 55 25 6 8 5 5 52 23 6 11 7 -0.26 -136 0 0 5 34 24 21 9 53.2 39 127 76 5 28 4 5 40 44 5 25 3 5 43 45 -0.26 -135 0 0 5 7 17 21 9 55.1 40 127 76 5 0 58 5 13 36 4 57 57 5 16 37 -0.26 -134 0 0 4 40 24 21 9 57.1 41 127 76 4 34 5 4 46 43 4 31 5 4 49 43 -0.26 -133 0 0 4 13 46 21 9 59.2 42 127 76 4 7 28 4 20 4 4 4 28 4 23 5 -0.26 -132 0 0 3 47 24 21 10 1.2 43 128 75 3 41 7 3 53 41 3 38 7 3 56 41 -0.26 -131 0 0 3 21 18 21 10 3.3 44 128 75 3 15 1 3 27 35 3 12 2 3 30 35 -0.26 -130 0 0 2 55 29 21 10 5.5 45 128 75 2 49 13 3 1 45 2 46 13 3 4 44 -0.26 -129 0 0 2 29 57 21 10 7.7 46 129 74 2 23 42 2 36 13 2 20 43 2 39 12 -0.26 -128 0 0 2 4 44 21 10 9.9 47 129 74 1 58 29 2 10 58 1 55 30 2 13 57 -0.26 -127 0 0 1 39 49 21 10 12.1 48 130 73 1 33 35 1 46 3 1 30 37 1 49 1 -0.26 -126 0 0 1 15 13 21 10 14.4 49 130 73 1 9 0 1 21 26 1 6 2 1 24 25 -0.26 -125 0 0 0 50 57 21 10 16.7 50 130 72 0 44 45 0 57 10 0 41 47 1 0 8 -0.26 -124 0 0 0 27 1 21 10 19.1 51 131 71 0 20 50 0 33 13 0 17 52 0 36 11 -0.26 -123 0 0 0 3 26 21 10 21.5 52 131 70 - 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8 57 5 21 13 27.7 46 245 -1 - 9 2 56 - 8 51 15 - 9 5 43 - 8 48 28 -0.27 - 49 0 0 - 8 47 14 21 13 29.7 45 245 -2 - 8 53 5 - 8 41 23 - 8 55 52 - 8 38 36 -0.27 - 48 0 0 - 8 36 56 21 13 31.7 44 245 -3 - 8 42 47 - 8 31 4 - 8 45 34 - 8 28 16 -0.27 - 47 0 0 - 8 26 9 21 13 33.6 43 245 -4 - 8 32 1 - 8 20 17 - 8 34 48 - 8 17 29 -0.27 - 46 0 0 - 8 14 55 21 13 35.6 42 245 -5 - 8 20 47 - 8 9 2 - 8 23 35 - 8 6 14 -0.27 - 45 0 0 - 8 3 13 21 13 37.4 41 245 -6 - 8 9 6 - 7 57 20 - 8 11 54 - 7 54 32 -0.27 - 44 0 0 - 7 51 4 21 13 39.3 40 245 -7 - 7 56 57 - 7 45 11 - 7 59 46 - 7 42 22 -0.27 - 43 0 0 - 7 38 27 21 13 41.1 39 245 -8 - 7 44 21 - 7 32 34 - 7 47 10 - 7 29 45 -0.27 - 42 0 0 - 7 25 24 21 13 42.9 38 245 -9 - 7 31 18 - 7 19 29 - 7 34 7 - 7 16 40 -0.27 - 41 0 0 - 7 11 53 21 13 44.6 37 245 -10 - 7 17 48 - 7 5 58 - 7 20 37 - 7 3 8 -0.27 - 40 0 0 - 6 57 55 21 13 46.3 36 245 -11 - 7 3 50 - 6 51 59 - 7 6 40 - 6 49 10 -0.27 - 39 0 0 - 6 43 30 21 13 48.0 35 246 -12 - 6 49 26 - 6 37 34 - 6 52 16 - 6 34 44 -0.27 - 38 0 0 - 6 28 39 21 13 49.6 34 246 -13 - 6 34 35 - 6 22 42 - 6 37 26 - 6 19 52 -0.27 - 37 0 0 - 6 13 21 21 13 51.2 33 246 -14 - 6 19 18 - 6 7 23 - 6 22 8 - 6 4 33 -0.27 - 36 0 0 - 5 57 36 21 13 52.8 32 246 -15 - 6 3 34 - 5 51 38 - 6 6 25 - 5 48 47 -0.27 - 35 0 0 - 5 41 26 21 13 54.3 31 246 -16 - 5 47 24 - 5 35 27 - 5 50 15 - 5 32 36 -0.27 - 34 0 0 - 5 24 49 21 13 55.8 30 246 -17 - 5 30 48 - 5 18 50 - 5 33 39 - 5 15 58 -0.27 - 33 0 0 - 5 7 46 21 13 57.2 29 246 -18 - 5 13 46 - 5 1 46 - 5 16 38 - 4 58 54 -0.27 - 32 0 0 - 4 50 18 21 13 58.6 28 246 -19 - 4 56 18 - 4 44 17 - 4 59 10 - 4 41 25 -0.27 - 31 0 0 - 4 32 24 21 13 59.9 27 246 -20 - 4 38 25 - 4 26 23 - 4 41 18 - 4 23 30 -0.27 - 30 0 0 - 4 14 5 21 14 1.2 26 246 -21 - 4 20 7 - 4 8 3 - 4 23 0 - 4 5 10 -0.27 - 29 0 0 - 3 55 21 21 14 2.5 25 246 -22 - 4 1 24 - 3 49 19 - 4 4 17 - 3 46 25 -0.27 - 28 0 0 - 3 36 13 21 14 3.7 24 246 -23 - 3 42 16 - 3 30 9 - 3 45 9 - 3 27 16 -0.27 - 27 0 0 - 3 16 40 21 14 4.8 23 246 -24 - 3 22 43 - 3 10 35 - 3 25 37 - 3 7 42 -0.27 - 26 0 0 - 2 56 42 21 14 6.0 22 245 -25 - 3 2 47 - 2 50 38 - 3 5 41 - 2 47 43 -0.27 - 25 0 0 - 2 36 21 21 14 7.0 20 245 -26 - 2 42 27 - 2 30 16 - 2 45 21 - 2 27 21 -0.27 - 24 0 0 - 2 15 37 21 14 8.0 19 245 -27 - 2 21 43 - 2 9 31 - 2 24 37 - 2 6 36 -0.27 - 23 0 0 - 1 54 29 21 14 9.0 18 245 -28 - 2 0 36 - 1 48 22 - 2 3 31 - 1 45 27 -0.27 - 22 0 0 - 1 32 58 21 14 9.9 17 245 -29 - 1 39 6 - 1 26 51 - 1 42 1 - 1 23 55 -0.27 - 21 0 0 - 1 11 5 21 14 10.8 16 245 -30 - 1 17 13 - 1 4 57 - 1 20 9 - 1 2 1 -0.27 - 20 0 0 - 0 48 50 21 14 11.6 15 245 -32 - 0 54 59 - 0 42 41 - 0 57 55 - 0 39 45 -0.27 - 19 0 0 - 0 26 13 21 14 12.3 14 245 -33 - 0 32 23 - 0 20 4 - 0 35 19 - 0 17 7 -0.27 - 18 0 0 - 0 3 15 21 14 13.1 13 246 -34 - 0 9 26 0 2 55 - 0 12 22 0 5 52 -0.27 - 17 0 0 0 20 4 21 14 13.7 12 246 -35 0 13 53 0 26 15 0 10 56 0 29 12 -0.27 - 16 0 0 0 43 43 21 14 14.3 11 246 -36 0 37 31 0 49 55 0 34 34 0 52 52 -0.27 - 15 0 0 1 7 42 21 14 14.8 10 246 -37 1 1 30 1 13 55 0 58 32 1 16 53 -0.27 - 14 0 0 1 32 1 21 14 15.3 9 246 -38 1 25 48 1 38 14 1 22 50 1 41 12 -0.27 - 13 0 0 1 56 38 21 14 15.8 8 246 -39 1 50 25 2 2 52 1 47 26 2 5 51 -0.27 - 12 0 0 2 21 34 21 14 16.1 7 246 -40 2 15 20 2 27 49 2 12 21 2 30 48 -0.27 - 11 0 0 2 46 48 21 14 16.5 5 246 -41 2 40 33 2 53 3 2 37 34 2 56 2 -0.27 - 10 0 0 3 12 19 21 14 16.7 4 246 -42 3 6 3 3 18 35 3 3 4 3 21 34 -0.27 - 9 0 0 3 38 7 21 14 16.9 3 246 -43 3 31 50 3 44 23 3 28 51 3 47 23 -0.27 - 8 0 0 4 4 10 21 14 17.1 2 246 -44 3 57 53 4 10 28 3 54 54 4 13 28 -0.27 - 7 0 0 4 30 30 21 14 17.2 1 246 -45 4 24 12 4 36 48 4 21 12 4 39 48 -0.27 - 6 0 0 4 57 4 21 14 17.2 0 246 -46 4 50 46 5 3 22 4 47 45 .. .. .. -0.25 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 332-081321 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 25 28.6213 DE: -23 46 27.062 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 25 28.6209 DE: -23 46 27.061 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.400) * V mag [mag]: 11.3 * B mag [mag]: 12.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1378) Leonce asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.55360 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 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): 0.017", 0.002", 103.443° remarks: * orbital elements for (1378)Leonce : Mean anomaly = 18.0377962013 deg Arg. of pericenter = 202.0845234098 deg Long. of node = 43.5057693883 deg Inclination = 3.5918618865 deg Eccentricity = 0.1511117827 Semimajor axis = 2.3742774398 AU Perihelion dist = 2.0154961433 AU Mag: H = 12.29, G = 0.15 Epoch of elements : MJD 60595.88318992 TDT (2024 Oct 12.8832) ------ occelmnt file for Occult BEGIN ----------------------------------- <Occultations> <Event> <Elements>JPL#502023Apr24,0.50,2024,10,12,21.196560,0.044465,0.256512,22.890747,-3.909030,0.003916,-0.000752,-0.000001,0.000000</Elements> <Earth>-93.1432,-23.8309,-141.38,-7.83,False</Earth> <Star>UCAC4 332-081321,16.42461709,-23.7741839,12.22,11.34,10.86,0.1,4,,16.44914853,-23.8309358,5.59,5.61,0,0,0</Star> <Object>1378,Leonce,16.92,20.535,2.5536,0,0,5.746,-13.46,,1.2,0</Object> <Orbit>0,17.7999,2024,10,12,202.0845,43.5058,3.5919,0.15111,2.37428,2.01550,12.29,5.0,0.15</Orbit> <Errors>1.239,0.0173,0.0024,103,0.0026,Known errors,1.85,0,-1,-1</Errors> <ID>20241012_081321,60140.63</ID> </Event> </Occultations> ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org