IOTA/IOTA-ES occultation update for (393) Lampetia / UCAC4 413-107041 event on 2023 Apr 29, 09:59 UT Visible from W USA, W Canada, Hawaii Summary ------- On 2023 Apr 29 UT, the 129.2 km diameter asteroid (393) Lampetia will occult a 11.7 mag star in the constellation Scutum for observers along a path across W USA, W Canada, Hawaii. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.85 mag to 11.90 mag (the magnitude of the asteroid) for at most 9.210 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: 2023 Apr 29, 09:55 - 2023 Apr 29, 10:03 * geocentric midpoint of event [JD]: 2460063.91618950 * magnitude of target star: 11.72 * magnitude drop [mag]: 0.85 * estimated maximum duration [s]: 9.210 * Moon: 65 % sunlit, 134° distance * Sun: 113° distance * rough path description: W USA, W Canada, Hawaii The occultation path -------------------- * approximate projected width [km]: 278 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.003", 78°) * approx speed of asteroid's shadow [km/s]: 14.0319 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 413-107041 by 393 Lampetia on 2023 Apr 29 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 ' " Longitude Longitude Longitude Longitude .. .. .. 72 0 0 .. .. .... .. .. .. -148 5 48 ... .. .. -146 17 0 ... .. .. .... -150 25 52 71 0 0 10 2 47.0 0 114 -5 -143 0 39 ... .. .. -141 37 30 ... .. .. .... -145 7 11 70 0 0 10 2 46.2 2 119 -6 -139 19 20 ... .. .. -138 9 47 ... .. .. 1.10 -141 21 25 69 0 0 10 2 44.6 4 123 -6 -136 27 10 -147 24 57 -135 26 26 -149 4 27 1.52 -138 27 25 68 0 0 10 2 42.6 5 125 -7 -134 8 27 -143 30 45 -133 13 58 -144 48 58 1.66 -136 7 48 67 0 0 10 2 40.2 7 128 -8 -132 14 20 -140 32 55 -131 24 37 -141 39 15 1.72 -134 13 12 66 0 0 10 2 37.4 8 129 -9 -130 39 16 -138 11 16 -129 53 18 -139 9 45 1.76 -132 37 48 65 0 0 10 2 34.3 9 131 -9 -129 19 24 -136 15 27 -128 36 31 -137 8 16 1.78 -131 17 46 64 0 0 10 2 31.0 10 132 -10 -128 12 5 -134 39 18 -127 31 44 -135 27 48 1.80 -130 10 18 63 0 0 10 2 27.5 11 133 -11 -127 15 15 -133 18 45 -126 37 4 -134 3 48 1.81 -129 13 21 62 0 0 10 2 23.7 12 133 -12 -126 27 21 -132 10 56 -125 51 2 -132 53 10 1.82 -128 25 22 61 0 0 10 2 19.6 13 134 -13 -125 47 11 -131 13 45 -125 12 29 -131 53 39 1.83 -127 45 9 60 0 0 10 2 15.4 14 134 -13 -125 13 44 -130 25 38 -124 40 27 -131 3 32 1.83 -127 11 42 59 0 0 10 2 10.9 15 135 -14 -124 46 15 -129 45 20 -124 14 13 -130 21 32 1.84 -126 44 14 58 0 0 10 2 6.2 16 135 -15 -124 24 2 -129 11 53 -123 53 8 -129 46 36 1.84 -126 22 6 57 0 0 10 2 1.3 17 135 -16 -124 6 36 -128 44 30 -123 36 41 -129 17 55 1.84 -126 4 48 56 0 0 10 1 56.1 18 135 -17 -123 53 27 -128 22 31 -123 24 26 -128 54 48 1.85 -125 51 50 55 0 0 10 1 50.8 18 135 -17 -123 44 14 -128 5 25 -123 16 1 -128 36 41 1.85 -125 42 52 54 0 0 10 1 45.3 19 135 -18 -123 38 37 -127 52 44 -123 11 7 -128 23 6 1.85 -125 37 33 53 0 0 10 1 39.6 20 135 -19 -123 36 19 -127 44 7 -123 9 28 -128 13 42 1.86 -125 35 38 52 0 0 10 1 33.6 21 135 -20 -123 37 7 -127 39 15 -123 10 51 -128 8 6 1.86 -125 36 52 51 0 0 10 1 27.5 21 134 -21 -123 40 48 -127 37 51 -123 15 4 -128 6 4 -1.86 -125 41 5 50 0 0 10 1 21.2 22 134 -22 -123 47 13 -127 39 43 -123 21 58 -128 7 22 -1.86 -125 48 7 49 0 0 10 1 14.7 23 133 -23 -123 56 12 -127 44 38 -123 31 23 -128 11 47 -1.87 -125 57 48 48 0 0 10 1 8.0 23 133 -24 -124 7 39 -127 52 27 -123 43 13 -128 19 10 -1.87 -126 10 3 47 0 0 10 1 1.1 24 132 -25 -124 21 27 -128 3 3 -123 57 21 -128 29 22 -1.87 -126 24 44 46 0 0 10 0 54.0 24 132 -26 -124 37 30 -128 16 18 -124 13 43 -128 42 17 -1.88 -126 41 48 45 0 0 10 0 46.7 25 131 -27 -124 55 46 -128 32 8 -124 32 14 -128 57 50 -1.88 -127 1 11 44 0 0 10 0 39.3 25 131 -28 -125 16 10 -128 50 28 -124 52 52 -129 15 56 -1.88 -127 22 51 43 0 0 10 0 31.6 26 130 -29 -125 38 41 -129 11 15 -125 15 34 -129 36 31 -1.88 -127 46 44 42 0 0 10 0 23.8 26 129 -30 -126 3 16 -129 34 28 -125 40 19 -129 59 35 -1.89 -128 12 52 41 0 0 10 0 15.8 26 128 -31 -126 29 55 -130 0 5 -126 7 6 -130 25 6 -1.89 -128 41 13 40 0 0 10 0 7.6 27 127 -32 -126 58 39 -130 28 8 -126 35 54 -130 53 4 -1.89 -129 11 48 39 0 0 9 59 59.2 27 127 -33 -127 29 26 -130 58 35 -127 6 45 -131 23 30 -1.90 -129 44 39 38 0 0 9 59 50.7 27 126 -34 -128 2 20 -131 31 30 -127 39 40 -131 56 27 -1.90 -130 19 50 37 0 0 9 59 41.9 27 125 -35 -128 37 22 -132 6 55 -128 14 42 -132 31 57 -1.91 -130 57 22 36 0 0 9 59 33.0 27 124 -36 -129 14 36 -132 44 56 -128 51 52 -133 10 6 -1.91 -131 37 23 35 0 0 9 59 23.9 28 123 -38 -129 54 5 -133 25 39 -129 31 16 -133 51 0 -1.91 -132 19 57 34 0 0 9 59 14.6 28 122 -39 -130 35 56 -134 9 10 -130 12 58 -134 34 46 -1.92 -133 5 12 33 0 0 9 59 5.1 27 121 -40 -131 20 14 -134 55 39 -130 57 5 -135 21 35 -1.92 -133 53 19 32 0 0 9 58 55.4 27 120 -41 -132 7 7 -135 45 19 -131 43 44 -136 11 39 -1.93 -134 44 28 31 0 0 9 58 45.5 27 118 -42 -132 56 46 -136 38 22 -132 33 4 -137 5 13 -1.93 -135 38 54 30 0 0 9 58 35.5 27 117 -43 -133 49 21 -137 35 8 -133 25 18 -138 2 36 -1.94 -136 36 54 29 0 0 9 58 25.2 27 116 -45 -134 45 7 -138 35 59 -134 20 37 -139 4 11 -1.94 -137 38 51 28 0 0 9 58 14.7 26 115 -46 -135 44 22 -139 41 22 -135 19 20 -140 10 29 -1.95 -138 45 10 27 0 0 9 58 4.0 26 114 -47 -136 47 25 -140 51 53 -136 21 45 -141 22 9 -1.95 -139 56 26 26 0 0 9 57 53.1 25 113 -48 -137 54 43 -142 8 22 -137 28 17 -142 40 2 -1.96 -141 13 25 25 0 0 9 57 41.9 24 111 -50 -139 6 51 -143 31 50 -138 39 28 -144 5 18 -1.96 -142 37 6 24 0 0 9 57 30.5 23 110 -51 -140 24 30 -145 3 49 -139 55 58 -145 39 38 -1.97 -144 8 51 23 0 0 9 57 18.8 22 109 -52 -141 48 37 -146 46 29 -141 18 40 -147 25 29 -1.98 -145 50 40 22 0 0 9 57 6.7 21 108 -53 -143 20 31 -148 43 19 -142 48 44 -149 26 56 -1.99 -147 45 37 21 0 0 9 56 54.2 20 106 -55 -145 2 0 -151 0 28 -144 27 52 -151 51 26 -2.01 -149 58 56 20 0 0 9 56 41.2 18 105 -56 -146 55 55 -153 50 53 -146 18 31 -154 56 5 -2.03 Latitude Latitude Latitude Latitude -150 0 0 19 59 34 9 56 41.1 18 105 -56 18 38 16 21 25 7 18 20 20 21 45 13 -1.94 -151 0 0 19 35 46 9 56 35.7 17 105 -56 18 15 27 21 0 11 17 57 44 21 20 0 -1.98 -152 0 0 19 13 53 9 56 30.6 16 104 -56 17 54 27 20 37 16 17 36 55 20 56 49 -1.99 -153 0 0 18 53 50 9 56 25.9 15 104 -57 17 35 13 20 16 18 17 17 51 20 35 37 -1.99 -154 0 0 18 35 36 9 56 21.4 15 103 -57 17 17 43 19 57 14 17 0 30 20 16 20 -1.99 -155 0 0 18 19 8 9 56 17.2 14 103 -57 17 1 54 19 40 0 16 44 49 19 58 55 -2.00 -156 0 0 18 4 25 9 56 13.3 13 102 -57 16 47 45 19 24 36 16 30 47 19 43 21 -2.00 -157 0 0 17 51 23 9 56 9.7 12 102 -57 16 35 14 19 11 0 16 18 23 19 29 37 -2.00 -158 0 0 17 40 2 9 56 6.3 11 102 -57 16 24 20 18 59 9 16 7 35 19 17 38 -2.01 -159 0 0 17 30 21 9 56 3.3 10 101 -57 16 15 2 18 49 1 15 58 22 19 7 23 -2.01 -160 0 0 17 22 18 9 56 0.5 9 101 -57 16 7 19 18 40 35 15 50 42 18 58 52 -2.02 -161 0 0 17 15 51 9 55 58.0 8 100 -56 16 1 9 18 33 50 15 44 36 18 52 3 -2.03 -162 0 0 17 11 1 9 55 55.8 7 100 -56 15 56 31 18 28 45 15 40 1 18 46 54 -2.04 -163 0 0 17 7 46 9 55 53.8 6 100 -56 15 53 26 18 25 19 15 36 58 18 43 25 -2.06 -164 0 0 17 6 6 9 55 52.1 5 99 -55 15 51 52 18 23 31 15 35 26 18 41 36 -2.08 -165 0 0 17 6 0 9 55 50.7 4 99 -55 15 51 50 18 23 22 15 35 24 18 41 25 -2.11 -166 0 0 17 7 28 9 55 49.6 3 99 -55 15 53 18 18 24 49 15 36 52 18 42 52 -2.16 -167 0 0 17 10 29 9 55 48.8 3 99 -54 15 56 16 18 27 54 15 39 50 18 45 58 -2.25 -168 0 0 17 15 4 9 55 48.2 2 98 -54 16 0 46 18 32 36 15 44 18 18 50 41 -2.46 -169 0 0 17 21 13 9 55 47.9 1 98 -53 16 6 45 18 38 55 15 50 16 18 57 3 -3.32 Uncertainty in time = +/- 2 secs Prediction of 2023 Mar 1.1 Data for the target star ------------------------ * name: UCAC4 413-107041 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 55 07.9545 DE: -07 27 36.815 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 55 07.9545 DE: -07 27 36.815 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (393) Lampetia asteroid class: approx. diameter [km]: 129 approx. diameter ["]: 0.128 distance from Earth [AU]: 1.38830 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#126 date of fit: 2023 Feb 07 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): 0.026", 0.003", 78.465° remarks: * orbital elements for (393)Lampetia : Mean anomaly = 337.0709480648 deg Arg. of pericenter = 90.8675159794 deg Long. of node = 212.3931343801 deg Inclination = 14.8773234557 deg Eccentricity = 0.3299802968 Semimajor axis = 2.7797030554 AU Perihelion dist = 1.8624558161 AU Mag: H = 8.43, G = 0.15 Epoch of elements : MJD 60063.41618056 TDT (2023 Apr 29.4162) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1262023Feb07,9.21,2023,4,29,9.988548,-0.624647,0.627580,5.613039,5.587500,-0.004635,-0.001045,0.000001,0.000000 -82.8354,-7.4324,29.53,14.45,False UCAC4 413-107041,18.91887622,-7.4602265,0.00,11.72,0.00,0.0,0,,18.93987543,-7.4324455,0.85,0.00,0,0,0 393,Lampetia,11.90,129.2,1.3883,0,0,2.390,35.40,,8.4,0 0,336.9824,2023,4,29,90.8675,212.3931,14.8773,0.32998,2.77970,1.86246,8.45,5.0,0.15 1.113,0.0260,0.0033,78,0.0146,Known errors,-1.00,-1,-1,-1 20230429_107041,60004.06 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Mar 01, 01:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org