IOTA/IOTA-ES occultation update for (11) Parthenope / UCAC4 342-093814 event on 2023 Sep 24, 01:12 UT Visible from South America Summary ------- On 2023 Sep 24 UT, the 150.9 km diameter asteroid (11) Parthenope will occult a 12.2 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 0.40 mag to 11.36 mag (the magnitude of the asteroid) for at most 6.440 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: 100 * date and approx. time of event: 2023 Sep 24, 01:07 - 2023 Sep 24, 01:17 * geocentric midpoint of event [JD]: 2460211.55027575 * magnitude of target star: 12.24 * magnitude drop [mag]: 0.40 * estimated maximum duration [s]: 6.440 * Moon: 63 % sunlit, 25° distance * Sun: 81° distance * rough path description: South America Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 151 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.004, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.004", 0.002", 99°) * approx speed of asteroid's shadow [km/s]: 23.4361 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 342-093814 by 11 Parthenope on 2023 Sep 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 156 0 0 10 27 40 1 7 52.0 1 112 78 9 43 27 11 11 54 9 41 19 11 14 2 .... 157 0 0 10 3 24 1 7 52.1 2 112 79 9 19 9 10 47 41 9 17 1 10 49 49 0.06 158 0 0 9 38 56 1 7 52.3 3 113 80 8 54 39 10 23 15 8 52 30 10 25 24 0.02 159 0 0 9 14 18 1 7 52.6 4 113 80 8 29 58 9 58 39 8 27 49 10 0 48 0.00 160 0 0 8 49 29 1 7 52.9 5 113 81 8 5 6 9 33 52 8 2 58 9 36 1 -0.01 161 0 0 8 24 30 1 7 53.4 6 113 81 7 40 5 9 8 56 7 37 56 9 11 4 -0.01 162 0 0 7 59 21 1 7 54.0 7 113 82 7 14 54 8 43 49 7 12 46 8 45 58 -0.02 163 0 0 7 34 4 1 7 54.7 8 113 82 6 49 35 8 18 34 6 47 27 8 20 43 -0.02 164 0 0 7 8 38 1 7 55.4 9 113 82 6 24 8 7 53 10 6 21 59 7 55 19 -0.02 165 0 0 6 43 5 1 7 56.3 10 114 82 5 58 33 7 27 39 5 56 24 7 29 48 -0.02 166 0 0 6 17 25 1 7 57.3 11 114 82 5 32 52 7 2 0 5 30 43 7 4 9 -0.02 167 0 0 5 51 39 1 7 58.3 12 114 81 5 7 4 6 36 15 5 4 55 6 38 24 -0.03 168 0 0 5 25 47 1 7 59.5 13 114 81 4 41 11 6 10 24 4 39 2 6 12 33 -0.03 169 0 0 4 59 49 1 8 0.7 15 114 80 4 15 12 5 44 28 4 13 3 5 46 37 -0.03 170 0 0 4 33 47 1 8 2.1 16 114 80 3 49 10 5 18 27 3 47 0 5 20 36 -0.03 171 0 0 4 7 42 1 8 3.5 17 114 79 3 23 3 4 52 22 3 20 54 4 54 31 -0.03 172 0 0 3 41 33 1 8 5.1 18 114 78 2 56 54 4 26 14 2 54 44 4 28 23 -0.03 173 0 0 3 15 22 1 8 6.7 19 114 78 2 30 42 4 0 3 2 28 33 4 2 12 -0.03 174 0 0 2 49 8 1 8 8.4 20 114 77 2 4 29 3 33 50 2 2 19 3 35 59 -0.03 175 0 0 2 22 54 1 8 10.3 21 114 76 1 38 14 3 7 35 1 36 5 3 9 45 -0.03 176 0 0 1 56 39 1 8 12.2 22 114 75 1 11 59 2 41 20 1 9 50 2 43 30 -0.03 177 0 0 1 30 24 1 8 14.2 23 114 74 0 45 45 2 15 6 0 43 35 2 17 15 -0.03 178 0 0 1 4 11 1 8 16.3 24 114 73 0 19 31 1 48 51 0 17 22 1 51 1 -0.03 179 0 0 0 37 58 1 8 18.5 26 114 72 - 0 6 40 1 22 38 - 0 8 50 1 24 48 -0.03 -180 0 0 0 11 48 1 8 20.8 27 115 71 - 0 32 50 0 56 28 - 0 34 59 0 58 37 -0.03 -179 0 0 - 0 14 19 1 8 23.2 28 115 70 - 0 58 56 0 30 20 - 1 1 5 0 32 29 -0.03 -178 0 0 - 0 40 23 1 8 25.7 29 115 69 - 1 24 59 0 4 15 - 1 27 8 0 6 24 -0.03 -177 0 0 - 1 6 22 1 8 28.2 30 115 68 - 1 50 57 - 0 21 46 - 1 53 6 - 0 19 36 -0.03 -176 0 0 - 1 32 17 1 8 30.9 31 115 67 - 2 16 50 - 0 47 42 - 2 18 59 - 0 45 32 -0.03 -175 0 0 - 1 58 6 1 8 33.6 32 115 66 - 2 42 38 - 1 13 32 - 2 44 47 - 1 11 23 -0.03 -174 0 0 - 2 23 48 1 8 36.4 33 114 65 - 3 8 19 - 1 39 16 - 3 10 28 - 1 37 7 -0.03 -173 0 0 - 2 49 24 1 8 39.3 34 114 64 - 3 33 53 - 2 4 54 - 3 36 2 - 2 2 45 -0.03 -172 0 0 - 3 14 52 1 8 42.3 35 114 63 - 3 59 19 - 2 30 24 - 4 1 28 - 2 28 15 -0.04 -171 0 0 - 3 40 12 1 8 45.4 36 114 62 - 4 24 37 - 2 55 46 - 4 26 46 - 2 53 37 -0.04 -170 0 0 - 4 5 24 1 8 48.5 38 114 61 - 4 49 46 - 3 21 0 - 4 51 55 - 3 18 51 -0.04 -169 0 0 - 4 30 26 1 8 51.7 39 114 60 - 5 14 46 - 3 46 4 - 5 16 54 - 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51 0 0 -13 41 58 1 16 33.3 23 252 -57 -14 24 47 -12 59 8 -14 26 51 -12 57 3 -0.04 - 50 0 0 -13 23 50 1 16 35.2 22 252 -58 -14 6 43 -12 40 56 -14 8 47 -12 38 51 -0.04 - 49 0 0 -13 5 22 1 16 37.1 21 252 -59 -13 48 19 -12 22 24 -13 50 23 -12 20 20 -0.04 - 48 0 0 -12 46 35 1 16 38.8 20 251 -60 -13 29 35 -12 3 33 -13 31 40 -12 1 28 -0.04 - 47 0 0 -12 27 28 1 16 40.5 19 251 -61 -13 10 32 -11 44 22 -13 12 37 -11 42 17 -0.04 - 46 0 0 -12 8 1 1 16 42.0 18 251 -62 -12 51 10 -11 24 52 -12 53 15 -11 22 47 -0.03 - 45 0 0 -11 48 17 1 16 43.5 17 251 -63 -12 31 29 -11 5 3 -12 33 34 -11 2 58 -0.03 - 44 0 0 -11 28 13 1 16 45.0 16 250 -64 -12 11 29 -10 44 56 -12 13 34 -10 42 50 -0.03 - 43 0 0 -11 7 52 1 16 46.3 15 250 -65 -11 51 11 -10 24 30 -11 53 17 -10 22 25 -0.03 - 42 0 0 -10 47 12 1 16 47.5 14 250 -66 -11 30 36 -10 3 47 -11 32 41 -10 1 42 -0.03 - 41 0 0 -10 26 15 1 16 48.7 13 250 -68 -11 9 43 - 9 42 47 -11 11 48 - 9 40 41 -0.03 - 40 0 0 -10 5 2 1 16 49.8 12 250 -69 -10 48 32 - 9 21 29 -10 50 38 - 9 19 23 -0.03 - 39 0 0 - 9 43 31 1 16 50.8 11 250 -70 -10 27 5 - 8 59 55 -10 29 12 - 8 57 49 -0.03 - 38 0 0 - 9 21 44 1 16 51.7 10 249 -71 -10 5 22 - 8 38 5 -10 7 29 - 8 35 59 -0.03 - 37 0 0 - 8 59 42 1 16 52.5 9 249 -72 - 9 43 23 - 8 15 59 - 9 45 30 - 8 13 52 -0.03 - 36 0 0 - 8 37 24 1 16 53.2 8 249 -73 - 9 21 8 - 7 53 38 - 9 23 15 - 7 51 31 -0.03 - 35 0 0 - 8 14 51 1 16 53.8 7 249 -74 - 8 58 39 - 7 31 2 - 9 0 46 - 7 28 55 -0.02 - 34 0 0 - 7 52 3 1 16 54.4 6 249 -75 - 8 35 55 - 7 8 11 - 8 38 2 - 7 6 4 -0.02 - 33 0 0 - 7 29 2 1 16 54.8 5 249 -76 - 8 12 56 - 6 45 6 - 8 15 3 - 6 42 59 -0.01 - 32 0 0 - 7 5 47 1 16 55.2 3 249 -77 - 7 49 44 - 6 21 48 - 7 51 51 - 6 19 41 -0.01 - 31 0 0 - 6 42 19 1 16 55.5 2 248 -78 - 7 26 19 - 5 58 17 - 7 28 26 - 5 56 10 0.01 - 30 0 0 - 6 18 38 1 16 55.6 1 248 -79 - 7 2 41 - 5 34 34 - 7 4 49 - 5 32 26 0.04 - 29 0 0 - 5 54 46 1 16 55.7 0 248 -80 - 6 38 51 .. .. .. - 6 40 59 .. .. .. 0.38 Uncertainty in time = +/- 0 secs Prediction of 2023 Aug 27.0 Data for the target star ------------------------ * name: UCAC4 342-093814 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 21 47.3575 DE: -21 39 02.295 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 21 47.3574 DE: -21 39 02.295 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.2 * 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 ["]: 0.096 distance from Earth [AU]: 2.17570 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#127 date of fit: 2023 Aug 21 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): 0.004", 0.002", 98.633° remarks: * orbital elements for (11)Parthenope : Mean anomaly = 331.9224609388 deg Arg. of pericenter = 195.8276830323 deg Long. of node = 125.5172991380 deg Inclination = 4.6315655359 deg Eccentricity = 0.0993113991 Semimajor axis = 2.4526024272 AU Perihelion dist = 2.2090310487 AU Mag: H = 6.73, G = 0.15 Epoch of elements : MJD 60211.05034722 TDT (2023 Sep 24.0503) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1272023Aug21,6.44,2023,9,24,1.206618,0.006892,0.044837,13.071659,-2.027499,0.005353,-0.000314,0.000000,0.000000 -119.9208,-21.6742,159.97,-0.30,False UCAC4 342-093814,17.36315489,-21.6506376,0.00,12.24,0.00,0.0,0,,17.38664163,-21.6741858,0.40,0.00,0,0,0 11,Parthenope,11.36,150.900,2.1757,0,0,3.791,-8.19,,8.4,0 0,331.6529,2023,9,23,195.8277,125.5173,4.6316,0.09931,2.45260,2.20903,6.73,5.0,0.15 1.024,0.0040,0.0023,99,0.0046,Known errors,-1.00,0,-1,-1 20230924_093814,60182.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 26, 23:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org