IOTA/IOTA-ES occultation update for (1069) Planckia / TYC 5699-01959-1 event on 2023 Aug 03, 14:16 UT Visible from Japan, China, SE Asia Summary ------- On 2023 Aug 03 UT, the 38.8 km diameter asteroid (1069) Planckia will occult a 10.6 mag star in the constellation Scutum for observers along a path across Japan, China, SE Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.87 mag to 14.48 mag (the magnitude of the asteroid) for at most 3.770 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: 79 * date and approx. time of event: 2023 Aug 03, 14:07 - 2023 Aug 03, 14:26 * geocentric midpoint of event [JD]: 2460160.09497109 * magnitude of target star: 10.64 * magnitude drop [mag]: 3.87 * estimated maximum duration [s]: 3.770 * Moon: 95 % sunlit, 60° distance * Sun: 146° distance * rough path description: Japan, China, SE Asia The occultation path -------------------- * approximate projected width [km]: 44 * 1 sigma uncertainty interval [path widths]: +/- 0.70 * 1 sigma uncertainty interval [seconds]: +/- 2.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.001", 96°) * approx speed of asteroid's shadow [km/s]: 10.3034 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5699-01959-1 by 1069 Planckia on 2023 Aug 3 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 18 0 0 - 9 41 13 14 25 56.8 0 103 31 .. .. .. - 9 53 21 .. .. .. -10 10 15 .... 19 0 0 - 9 54 9 14 25 56.7 1 102 30 - 9 42 1 -10 6 16 - 9 25 4 -10 23 7 -0.19 20 0 0 -10 6 20 14 25 56.4 2 102 29 - 9 54 14 -10 18 25 - 9 37 20 -10 35 13 -0.36 21 0 0 -10 17 46 14 25 55.8 3 102 28 -10 5 42 -10 29 49 - 9 48 50 -10 46 34 -0.41 22 0 0 -10 28 27 14 25 55.1 4 102 27 -10 16 24 -10 40 28 - 9 59 35 -10 57 11 -0.44 23 0 0 -10 38 22 14 25 54.1 5 102 26 -10 26 22 -10 50 22 -10 9 35 -11 7 2 -0.46 24 0 0 -10 47 34 14 25 53.0 6 102 25 -10 35 35 -10 59 31 -10 18 50 -11 16 10 -0.47 25 0 0 -10 56 1 14 25 51.6 7 101 24 -10 44 3 -11 7 57 -10 27 20 -11 24 34 -0.47 26 0 0 -11 3 44 14 25 50.1 8 101 23 -10 51 47 -11 15 39 -10 35 6 -11 32 14 -0.48 27 0 0 -11 10 43 14 25 48.3 9 101 23 -10 58 48 -11 22 37 -10 42 9 -11 39 10 -0.48 28 0 0 -11 16 59 14 25 46.4 10 101 22 -11 5 4 -11 28 51 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61 33 27 61 6 52 61 52 2 60 48 25 -0.54 -179 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 61 21 35 .. .. .. 61 3 13 .... Uncertainty in time = +/- 4 secs Prediction of 2023 Jun 15.2 Data for the target star ------------------------ * name: TYC 5699-01959-1 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 32 48.3255 DE: -12 28 06.118 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 32 48.3255 DE: -12 28 06.118 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1069) Planckia asteroid class: approx. diameter [km]: 39 approx. diameter ["]: 0.023 distance from Earth [AU]: 2.34170 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): 0.023", 0.001", 96.016° remarks: * orbital elements for (1069)Planckia : Mean anomaly = 102.0040006736 deg Arg. of pericenter = 31.0105564835 deg Long. of node = 142.3514225804 deg Inclination = 13.5615636511 deg Eccentricity = 0.1093903257 Semimajor axis = 3.1270851620 AU Perihelion dist = 2.7850122976 AU Mag: H = 9.43, G = 0.15 Epoch of elements : MJD 60159.59493056 TDT (2023 Aug 03.5949) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,3.77,2023,8,3,14.279306,-0.273068,0.363663,-4.650281,-3.492151,0.003064,-0.000701,0.000001,0.000000 112.4410,-12.4507,-32.63,17.47,False TYC 5699-01959-1,18.54675710,-12.4683661,0.00,10.64,0.00,0.0,0,,18.56901677,-12.4507201,3.87,0.00,0,0,0 1069,Planckia,14.48,38.800,2.3417,0,0,-1.192,-13.12,,2.6,0 0,101.8980,2023,8,3,31.0106,142.3514,13.5616,0.10939,3.12709,2.78501,9.43,5.0,0.15 1.697,0.0233,0.0013,96,0.0159,Known errors,-1.00,-1,-1,-1 20230803_1959-1,60110.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jun 15, 05:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org