IOTA/IOTA-ES occultation update for (193) Ambrosia / TYC 7887-01708-1 event on 2023 Jun 15, 10:26 UT Visible from New Zealand, Australia Summary ------- On 2023 Jun 15 UT, the 30.4 km diameter asteroid (193) Ambrosia will occult a 11.4 mag star in the constellation Scorpius for observers along a path across New Zealand, Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.44 mag to 14.75 mag (the magnitude of the asteroid) for at most 1.950 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 Jun 15, 10:19 - 2023 Jun 15, 10:33 * geocentric midpoint of event [JD]: 2460110.93493466 * magnitude of target star: 11.36 * magnitude drop [mag]: 3.44 * estimated maximum duration [s]: 1.950 * Moon: 8 % sunlit, 145° distance * Sun: 163° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.002", 89°) * approx speed of asteroid's shadow [km/s]: 15.6284 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7887-01708-1 by 193 Ambrosia on 2023 Jun 15 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 106 0 0 - 5 49 20 10 32 59.1 0 131 3 - 5 38 18 - 6 0 22 - 5 35 7 - 6 3 34 .... 107 0 0 - 6 40 57 10 32 59.0 1 130 2 - 6 29 54 - 6 52 0 - 6 26 42 - 6 55 12 0.23 108 0 0 - 7 32 40 10 32 58.6 3 130 1 - 7 21 37 - 7 43 44 - 7 18 24 - 7 46 57 0.20 109 0 0 - 8 24 28 10 32 58.1 4 130 -1 - 8 13 24 - 8 35 33 - 8 10 11 - 8 38 46 0.19 110 0 0 - 9 16 18 10 32 57.3 5 130 -2 - 9 5 13 - 9 27 23 - 9 2 0 - 9 30 37 0.19 111 0 0 -10 8 7 10 32 56.3 7 130 -3 - 9 57 1 -10 19 13 - 9 53 48 -10 22 27 0.18 112 0 0 -10 59 53 10 32 55.1 8 130 -4 -10 48 47 -11 11 0 -10 45 34 -11 14 13 0.18 113 0 0 -11 51 34 10 32 53.6 9 130 -6 -11 40 28 -12 2 41 -11 37 15 -12 5 55 0.18 114 0 0 -12 43 8 10 32 52.0 11 129 -7 -12 32 1 -12 54 15 -12 28 48 -12 57 29 0.18 115 0 0 -13 34 32 10 32 50.2 12 129 -8 -13 23 25 -13 45 39 -13 20 12 -13 48 53 0.18 116 0 0 -14 25 44 10 32 48.1 13 129 -9 -14 14 37 -14 36 51 -14 11 24 -14 40 4 0.18 117 0 0 -15 16 41 10 32 45.9 14 129 -10 -15 5 35 -15 27 48 -15 2 22 -15 31 1 0.18 118 0 0 -16 7 22 10 32 43.5 16 128 -12 -15 56 17 -16 18 29 -15 53 4 -16 21 42 0.18 119 0 0 -16 57 45 10 32 40.9 17 128 -13 -16 46 40 -17 8 51 -16 43 27 -17 12 4 0.18 120 0 0 -17 47 47 10 32 38.2 18 128 -14 -17 36 43 -17 58 52 -17 33 30 -18 2 5 0.18 121 0 0 -18 37 27 10 32 35.2 19 127 -15 -18 26 24 -18 48 31 -18 23 11 -18 51 44 0.18 122 0 0 -19 26 42 10 32 32.1 21 127 -16 -19 15 40 -19 37 45 -19 12 28 -19 40 58 0.18 123 0 0 -20 15 32 10 32 28.9 22 127 -17 -20 4 31 -20 26 33 -20 1 19 -20 29 45 0.18 124 0 0 -21 3 53 10 32 25.5 23 126 -19 -20 52 53 -21 14 53 -20 49 42 -21 18 5 0.18 125 0 0 -21 51 45 10 32 21.9 24 126 -20 -21 40 46 -22 2 44 -21 37 35 -22 5 55 0.18 126 0 0 -22 39 6 10 32 18.2 26 125 -21 -22 28 9 -22 50 3 -22 24 58 -22 53 14 0.18 127 0 0 -23 25 54 10 32 14.4 27 125 -22 -23 14 59 -23 36 50 -23 11 49 -23 40 0 0.18 128 0 0 -24 12 9 10 32 10.4 28 124 -23 -24 1 15 -24 23 3 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35 0.20 - 64 0 0 -17 15 6 10 19 43.4 10 231 -6 -17 4 0 -17 26 13 -17 0 47 -17 29 26 0.20 - 63 0 0 -16 24 35 10 19 42.0 8 230 -5 -16 13 28 -16 35 42 -16 10 15 -16 38 56 0.21 - 62 0 0 -15 33 44 10 19 40.8 7 230 -4 -15 22 37 -15 44 52 -15 19 23 -15 48 6 0.22 - 61 0 0 -14 42 36 10 19 39.7 6 230 -2 -14 31 28 -14 53 44 -14 28 15 -14 56 58 0.23 - 60 0 0 -13 51 12 10 19 38.9 4 229 -1 -13 40 4 -14 2 21 -13 36 51 -14 5 35 0.24 - 59 0 0 -12 59 36 10 19 38.3 3 229 0 -12 48 28 -13 10 44 -12 45 14 -13 13 59 0.27 - 58 0 0 -12 7 49 10 19 37.8 2 229 1 -11 56 41 -12 18 57 -11 53 27 -12 22 11 0.34 - 57 0 0 -11 15 53 10 19 37.6 1 229 3 -11 4 45 -11 27 1 -11 1 32 -11 30 15 0.73 Uncertainty in time = +/- 1 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 7887-01708-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 28 01.0223 DE: -40 20 38.133 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 28 01.0223 DE: -40 20 38.134 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (193) Ambrosia asteroid class: approx. diameter [km]: 30 approx. diameter ["]: 0.018 distance from Earth [AU]: 2.36050 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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): 0.008", 0.002", 88.896° remarks: * orbital elements for (193)Ambrosia : Mean anomaly = 200.3098323310 deg Arg. of pericenter = 82.5113759044 deg Long. of node = 349.5002404908 deg Inclination = 11.9938749355 deg Eccentricity = 0.2979520297 Semimajor axis = 2.5992124579 AU Perihelion dist = 1.8247718304 AU Mag: H = 9.81, G = 0.15 Epoch of elements : MJD 60110.43493056 TDT (2023 Jun 15.4349) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,1.95,2023,6,15,10.438432,-0.011205,-0.188165,-8.805504,0.524290,0.000088,0.001672,0.000001,0.000000 -157.6074,-40.3638,23.54,23.31,False TYC 7887-01708-1,17.46695064,-40.3439259,0.00,11.36,0.00,0.0,0,,17.49457102,-40.3637850,3.44,0.00,0,0,0 193,Ambrosia,14.75,30.4,2.3605,0,0,-2.870,1.96,,2.0,0 0,200.2075,2023,6,15,82.5114,349.5002,11.9939,0.29795,2.59921,1.82477,9.84,5.0,0.15 1.145,0.0083,0.0025,89,0.0026,Known errors,-1.00,-1,-1,-1 20230615_1708-1,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org