IOTA/IOTA-ES occultation update for (1069) Planckia / UCAC4 402-098253 event on 2023 Jun 27, 22:13 UT Visible from S Africa Summary ------- On 2023 Jun 27 UT, the 38.8 km diameter asteroid (1069) Planckia will occult a 11.3 mag star in the constellation Scutum for observers along a path across S Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.86 mag to 14.12 mag (the magnitude of the asteroid) for at most 2.960 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: 98 * date and approx. time of event: 2023 Jun 27, 22:05 - 2023 Jun 27, 22:21 * geocentric midpoint of event [JD]: 2460123.42628516 * magnitude of target star: 11.34 * magnitude drop [mag]: 2.86 * estimated maximum duration [s]: 2.960 * Moon: 65 % sunlit, 82° distance * Sun: 164° distance * rough path description: S Africa The occultation path -------------------- * approximate projected width [km]: 41 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.001", 95°) * approx speed of asteroid's shadow [km/s]: 13.1105 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 402-098253 by 1069 Planckia on 2023 Jun 27 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 - 62 0 0 -33 16 26 22 21 33.3 1 101 -15 -33 5 12 -33 27 41 -32 57 0 -33 35 55 .... - 61 0 0 -33 26 30 22 21 33.1 1 101 -15 -33 15 16 -33 37 45 -33 7 5 -33 45 57 0.27 - 60 0 0 -33 36 18 22 21 32.9 2 100 -16 -33 25 4 -33 47 31 -33 16 54 -33 55 44 0.29 - 59 0 0 -33 45 49 22 21 32.5 3 100 -17 -33 34 36 -33 57 2 -33 26 26 -34 5 14 0.30 - 58 0 0 -33 55 3 22 21 32.1 4 99 -18 -33 43 51 -34 6 16 -33 35 41 -34 14 27 0.30 - 57 0 0 -34 4 2 22 21 31.5 5 98 -19 -33 52 50 -34 15 14 -33 44 41 -34 23 25 0.30 - 56 0 0 -34 12 44 22 21 30.8 6 98 -20 -34 1 33 -34 23 55 -33 53 24 -34 32 6 0.31 - 55 0 0 -34 21 9 22 21 30.0 6 97 -20 -34 9 59 -34 32 20 -34 1 50 -34 40 30 0.31 - 54 0 0 -34 29 18 22 21 29.2 7 97 -21 -34 18 8 -34 40 28 -34 10 0 -34 48 38 0.31 - 53 0 0 -34 37 10 22 21 28.2 8 96 -22 -34 26 1 -34 48 20 -34 17 53 -34 56 30 0.31 - 52 0 0 -34 44 46 22 21 27.1 9 96 -23 -34 33 38 -34 55 56 -34 25 30 -35 4 5 0.31 - 51 0 0 -34 52 6 22 21 25.9 10 95 -24 -34 40 57 -35 3 15 -34 32 50 -35 11 23 0.31 - 50 0 0 -34 59 9 22 21 24.6 11 95 -25 -34 48 1 -35 10 17 -34 39 54 -35 18 25 0.31 - 49 0 0 -35 5 55 22 21 23.2 11 94 -25 -34 54 48 -35 17 3 -34 46 41 -35 25 11 0.31 - 48 0 0 -35 12 25 22 21 21.6 12 93 -26 -35 1 18 -35 23 32 -34 53 12 -35 31 40 0.31 - 47 0 0 -35 18 38 22 21 20.0 13 93 -27 -35 7 32 -35 29 45 -34 59 26 -35 37 52 0.31 - 46 0 0 -35 24 35 22 21 18.4 14 92 -28 -35 13 29 -35 35 41 -35 5 23 -35 43 48 0.31 - 45 0 0 -35 30 15 22 21 16.6 15 92 -29 -35 19 9 -35 41 21 -35 11 4 -35 49 28 0.31 - 44 0 0 -35 35 39 22 21 14.7 15 91 -29 -35 24 33 -35 46 45 -35 16 28 -35 54 51 0.32 - 43 0 0 -35 40 46 22 21 12.7 16 90 -30 -35 29 41 -35 51 51 -35 21 36 -35 59 58 0.32 - 42 0 0 -35 45 37 22 21 10.6 17 90 -31 -35 34 32 -35 56 42 -35 26 27 -36 4 48 0.32 - 41 0 0 -35 50 11 22 21 8.4 18 89 -32 -35 39 6 -36 1 16 -35 31 2 -36 9 21 0.32 - 40 0 0 -35 54 28 22 21 6.2 19 89 -33 -35 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Uncertainty in time = +/- 3 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 402-098253 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 58 22.6758 DE: -09 44 14.008 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 58 22.6758 DE: -09 44 14.007 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1069) Planckia asteroid class: approx. diameter [km]: 39 approx. diameter ["]: 0.024 distance from Earth [AU]: 2.20570 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 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): 0.025", 0.001", 94.923° remarks: * orbital elements for (1069)Planckia : Mean anomaly = 95.4442379974 deg Arg. of pericenter = 31.0327928984 deg Long. of node = 142.3519862568 deg Inclination = 13.5613956975 deg Eccentricity = 0.1093911559 Semimajor axis = 3.1272170442 AU Perihelion dist = 2.7851271571 AU Mag: H = 9.43, G = 0.15 Epoch of elements : MJD 60122.92631945 TDT (2023 Jun 27.9263) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,2.96,2023,6,27,22.230844,0.082572,-0.296667,-7.128047,-1.987536,-0.000722,-0.001332,0.000001,0.000000 35.6960,-9.7058,-152.67,23.30,False UCAC4 402-098253,18.97296550,-9.7372243,0.00,11.34,0.00,0.0,0,,18.99469299,-9.7057690,2.86,0.00,0,0,0 1069,Planckia,14.12,38.8,2.2057,0,0,-1.922,-7.92,,2.6,0 0,95.2791,2023,6,27,31.0328,142.3520,13.5614,0.10939,3.12722,2.78513,9.46,5.0,0.15 1.365,0.0250,0.0014,95,0.0089,Known errors,-1.00,-1,-1,-1 20230627_098253,60063.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org