IOTA/IOTA-ES occultation update for (11) Parthenope / UCAC4 362-082982 event on 2023 Mar 22, 09:27 UT Visible from South America Summary ------- On 2023 Mar 22 UT, the 150.9 km diameter asteroid (11) Parthenope will occult a 11.8 mag star in the constellation Ophiuchus for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.50 mag to 11.25 mag (the magnitude of the asteroid) for at most 12.420 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 Mar 22, 09:18 - 2023 Mar 22, 09:35 * geocentric midpoint of event [JD]: 2460025.89373817 * magnitude of target star: 11.82 * magnitude drop [mag]: 0.50 * estimated maximum duration [s]: 12.420 * Moon: 1 % sunlit, 113° distance * Sun: 103° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 154 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.014", 100°) * approx speed of asteroid's shadow [km/s]: 12.1465 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 362-082982 by 11 Parthenope on 2023 Mar 22 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 -155 0 0 -12 28 42 9 18 22.9 0 108 -69 -13 12 39 -11 44 51 -13 24 17 .. .. .. .... -154 0 0 -12 47 54 9 18 23.0 1 108 -70 -13 31 51 -12 4 4 -13 43 29 -11 52 30 0.21 -153 0 0 -13 7 4 9 18 23.3 2 108 -70 -13 51 1 -12 23 15 -14 2 39 -12 11 41 0.20 -152 0 0 -13 26 11 9 18 23.8 3 107 -71 -14 10 7 -12 42 22 -14 21 45 -12 30 48 0.20 -151 0 0 -13 45 15 9 18 24.5 4 107 -72 -14 29 10 -13 1 26 -14 40 48 -12 49 53 0.20 -150 0 0 -14 4 14 9 18 25.3 5 107 -72 -14 48 9 -13 20 26 -14 59 47 -13 8 53 0.20 -149 0 0 -14 23 10 9 18 26.3 6 107 -72 -15 7 4 -13 39 22 -15 18 41 -13 27 49 0.20 -148 0 0 -14 42 0 9 18 27.4 7 106 -73 -15 25 54 -13 58 14 -15 37 31 -13 46 41 0.20 -147 0 0 -15 0 46 9 18 28.7 8 106 -73 -15 44 38 -14 17 0 -15 56 15 -14 5 28 0.20 -146 0 0 -15 19 26 9 18 30.2 9 106 -73 -16 3 18 -14 35 41 -16 14 54 -14 24 9 0.20 -145 0 0 -15 38 0 9 18 31.9 10 106 -73 -16 21 51 -14 54 17 -16 33 27 -14 42 44 0.20 -144 0 0 -15 56 28 9 18 33.7 12 105 -74 -16 40 17 -15 12 45 -16 51 53 -15 1 14 0.20 -143 0 0 -16 14 49 9 18 35.7 13 105 -74 -16 58 37 -15 31 8 -17 10 13 -15 19 36 0.20 -142 0 0 -16 33 3 9 18 37.8 14 105 -74 -17 16 50 -15 49 23 -17 28 25 -15 37 52 0.20 -141 0 0 -16 51 10 9 18 40.1 15 104 -74 -17 34 55 -16 7 31 -17 46 30 -15 56 0 0.20 -140 0 0 -17 9 8 9 18 42.5 16 104 -73 -17 52 52 -16 25 31 -18 4 26 -16 14 1 0.20 -139 0 0 -17 26 59 9 18 45.2 17 104 -73 -18 10 41 -16 43 23 -18 22 15 -16 31 53 0.20 -138 0 0 -17 44 40 9 18 47.9 18 103 -73 -18 28 21 -17 1 7 -18 39 55 -16 49 37 0.20 -137 0 0 -18 2 13 9 18 50.8 19 103 -73 -18 45 52 -17 18 41 -18 57 25 -17 7 12 0.20 -136 0 0 -18 19 37 9 18 53.9 20 103 -72 -19 3 14 -17 36 6 -19 14 47 -17 24 38 0.20 -135 0 0 -18 36 51 9 18 57.1 21 102 -72 -19 20 26 -17 53 22 -19 31 58 -17 41 54 0.20 -134 0 0 -18 53 55 9 19 0.5 22 102 -71 -19 37 28 -18 10 28 -19 49 0 -17 59 0 0.20 -133 0 0 -19 10 48 9 19 4.0 23 102 -71 -19 54 19 -18 27 23 -20 5 51 -18 15 56 0.20 -132 0 0 -19 27 31 9 19 7.6 24 101 -70 -20 11 0 -18 44 8 -20 22 31 -18 32 41 0.20 -131 0 0 -19 44 3 9 19 11.4 25 101 -70 -20 27 30 -19 0 42 -20 39 0 -18 49 16 0.20 -130 0 0 -20 0 23 9 19 15.4 26 101 -69 -20 43 48 -19 17 5 -20 55 18 -19 5 39 0.20 -129 0 0 -20 16 32 9 19 19.4 27 100 -68 -20 59 55 -19 33 16 -21 11 24 -19 21 51 0.20 -128 0 0 -20 32 29 9 19 23.6 28 100 -68 -21 15 50 -19 49 15 -21 27 18 -19 37 51 0.20 -127 0 0 -20 48 14 9 19 28.0 29 99 -67 -21 31 33 -20 5 2 -21 43 0 -19 53 38 0.20 -126 0 0 -21 3 47 9 19 32.4 29 99 -66 -21 47 3 -20 20 37 -21 58 30 -20 9 14 0.20 -125 0 0 -21 19 6 9 19 37.0 30 99 -66 -22 2 20 -20 35 59 -22 13 46 -20 24 36 0.20 -124 0 0 -21 34 13 9 19 41.7 31 98 -65 -22 17 24 -20 51 8 -22 28 50 -20 39 46 0.19 -123 0 0 -21 49 6 9 19 46.6 32 98 -64 -22 32 15 -21 6 4 -22 43 40 -20 54 43 0.19 -122 0 0 -22 3 46 9 19 51.5 33 97 -63 -22 46 53 -21 20 46 -22 58 17 -21 9 26 0.19 -121 0 0 -22 18 13 9 19 56.6 34 97 -63 -23 1 16 -21 35 15 -23 12 40 -21 23 55 0.19 -120 0 0 -22 32 25 9 20 1.8 35 96 -62 -23 15 26 -21 49 30 -23 26 49 -21 38 10 0.19 -119 0 0 -22 46 23 9 20 7.1 36 96 -61 -23 29 21 -22 3 30 -23 40 44 -21 52 11 0.19 -118 0 0 -23 0 6 9 20 12.5 37 95 -60 -23 43 2 -22 17 16 -23 54 24 -22 5 58 0.19 -117 0 0 -23 13 35 9 20 18.0 38 95 -59 -23 56 29 -22 30 47 -24 7 50 -22 19 30 0.19 -116 0 0 -23 26 49 9 20 23.7 39 94 -59 -24 9 40 -22 44 4 -24 21 1 -22 32 47 0.19 -115 0 0 -23 39 48 9 20 29.4 40 94 -58 -24 22 37 -22 57 5 -24 33 56 -22 45 49 0.19 -114 0 0 -23 52 32 9 20 35.2 41 93 -57 -24 35 18 -23 9 52 -24 46 37 -22 58 36 0.19 -113 0 0 -24 5 0 9 20 41.2 42 93 -56 -24 47 44 -23 22 23 -24 59 2 -23 11 8 0.19 -112 0 0 -24 17 13 9 20 47.2 43 92 -55 -24 59 54 -23 34 38 -25 11 12 -23 23 24 0.19 -111 0 0 -24 29 10 9 20 53.3 44 91 -54 -25 11 48 -23 46 37 -25 23 5 -23 35 24 0.19 -110 0 0 -24 40 51 9 20 59.5 45 91 -53 -25 23 27 -23 58 21 -25 34 43 -23 47 8 0.19 -109 0 0 -24 52 16 9 21 5.9 46 90 -53 -25 34 49 -24 9 48 -25 46 5 -23 58 36 0.19 -108 0 0 -25 3 25 9 21 12.3 47 90 -52 -25 45 56 -24 21 0 -25 57 11 -24 9 48 0.19 -107 0 0 -25 14 17 9 21 18.7 48 89 -51 -25 56 46 -24 31 54 -26 8 0 -24 20 43 0.19 -106 0 0 -25 24 53 9 21 25.3 49 88 -50 -26 7 19 -24 42 33 -26 18 33 -24 31 22 0.19 -105 0 0 -25 35 12 9 21 31.9 49 88 -49 -26 17 36 -24 52 54 -26 28 49 -24 41 45 0.19 -104 0 0 -25 45 15 9 21 38.7 50 87 -48 -26 27 36 -25 2 59 -26 38 49 -24 51 50 0.19 -103 0 0 -25 55 0 9 21 45.5 51 86 -47 -26 37 19 -25 12 47 -26 48 31 -25 1 39 0.19 -102 0 0 -26 4 29 9 21 52.3 52 86 -46 -26 46 46 -25 22 18 -26 57 57 -25 11 10 0.19 -101 0 0 -26 13 41 9 21 59.3 53 85 -46 -26 55 55 -25 31 32 -27 7 6 -25 20 25 0.19 -100 0 0 -26 22 35 9 22 6.3 54 84 -45 -27 4 48 -25 40 29 -27 15 58 -25 29 22 0.19 - 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Uncertainty in time = +/- 2 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 362-082982 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 10 24.2829 DE: -17 36 06.002 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 10 24.2829 DE: -17 36 06.002 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (11) Parthenope asteroid class: ShapeModel approx. diameter [km]: 151 approx. diameter ["]: 0.105 distance from Earth [AU]: 1.98860 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#124 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): 0.017", 0.014", 100.192° remarks: * orbital elements for (11)Parthenope : Mean anomaly = 284.3669494832 deg Arg. of pericenter = 195.7468838340 deg Long. of node = 125.5201872780 deg Inclination = 4.6313494380 deg Eccentricity = 0.0994051761 Semimajor axis = 2.4530249591 AU Perihelion dist = 2.2091815811 AU Mag: H = 6.73, G = 0.15 Epoch of elements : MJD 60025.39395833 TDT (2023 Mar 22.3940) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1242023Feb07,12.42,2023,3,22,9.449716,0.007633,-0.183285,6.849999,0.282370,-0.005523,0.000344,0.000000,0.000000 -63.4375,-17.6316,40.00,0.60,False UCAC4 362-082982,17.17341188,-17.6016671,0.00,11.82,0.00,0.0,0,,17.19580018,-17.6316432,0.51,0.00,0,0,0 11,Parthenope,11.25,150.9,1.9886,0,0,2.119,1.25,,8.4,0 0,284.2659,2023,3,22,195.7469,125.5202,4.6313,0.09941,2.45302,2.20918,6.73,5.0,0.15 1.132,0.0167,0.0137,100,0.0138,Known errors,-1.00,-1,-1,-1 20230322_082982,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org