IOTA/IOTA-ES occultation update for (781) Kartvelia / TYC 0175-03104-1 event on 2023 Dec 15, 23:10 UT Visible from S Africa Summary ------- On 2023 Dec 15 UT, the 72 km diameter asteroid (781) Kartvelia will occult a 11.6 mag star in the constellation Canis Minor 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 3.46 mag to 15.01 mag (the magnitude of the asteroid) for at most 5.290 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 Dec 15, 23:04 - 2023 Dec 15, 23:16 * geocentric midpoint of event [JD]: 2460294.46552475 * magnitude of target star: 11.60 * magnitude drop [mag]: 3.46 * estimated maximum duration [s]: 5.290 * Moon: 11 % sunlit, 155° distance * Sun: 151° distance * rough path description: S Africa The occultation path -------------------- * approximate projected width [km]: 95 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.000", 81°) * approx speed of asteroid's shadow [km/s]: 13.6058 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0175-03104-1 by 781 Kartvelia on 2023 Dec 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 0 0 0 .. .. .... .. .. .. .. .. .. -28 57 6 .. .. .. -28 52 25 .. .. .. .... - 51 0 0 -29 16 13 23 16 15.6 1 82 -12 -28 50 12 -29 42 25 -28 45 31 -29 47 10 .... - 50 0 0 -29 9 34 23 16 15.4 2 81 -12 -28 43 34 -29 35 44 -28 38 53 -29 40 29 0.61 - 49 0 0 -29 3 9 23 16 15.0 3 81 -13 -28 37 11 -29 29 18 -28 32 30 -29 34 3 0.70 - 48 0 0 -28 57 0 23 16 14.5 3 80 -14 -28 31 3 -29 23 8 -28 26 22 -29 27 53 0.74 - 47 0 0 -28 51 7 23 16 13.9 4 80 -15 -28 25 10 -29 17 14 -28 20 30 -29 21 58 0.77 - 46 0 0 -28 45 29 23 16 13.1 5 80 -15 -28 19 34 -29 11 35 -28 14 54 -29 16 19 0.79 - 45 0 0 -28 40 7 23 16 12.2 6 79 -16 -28 14 13 -29 6 12 -28 9 33 -29 10 56 0.80 - 44 0 0 -28 35 1 23 16 11.1 7 79 -17 -28 9 7 -29 1 5 -28 4 28 -29 5 49 0.81 - 43 0 0 -28 30 11 23 16 9.9 8 78 -18 -28 4 18 -28 56 14 -27 59 38 -29 0 58 0.81 - 42 0 0 -28 25 37 23 16 8.5 9 78 -18 -27 59 44 -28 51 39 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46 -27 21 27 -28 22 28 0.85 - 29 0 0 -27 50 48 23 15 38.1 20 71 -27 -27 25 3 -28 16 44 -27 20 25 -28 21 26 0.85 - 28 0 0 -27 50 2 23 15 34.9 21 70 -27 -27 24 18 -28 15 57 -27 19 39 -28 20 39 0.85 - 27 0 0 -27 49 33 23 15 31.5 21 70 -28 -27 23 48 -28 15 27 -27 19 10 -28 20 10 0.85 - 26 0 0 -27 49 20 23 15 28.0 22 69 -28 -27 23 35 -28 15 14 -27 18 57 -28 19 56 0.85 - 25 0 0 -27 49 23 23 15 24.3 23 69 -29 -27 23 38 -28 15 17 -27 19 0 -28 19 59 0.85 - 24 0 0 -27 49 42 23 15 20.6 24 68 -29 -27 23 58 -28 15 36 -27 19 20 -28 20 18 0.85 - 23 0 0 -27 50 18 23 15 16.7 25 67 -30 -27 24 34 -28 16 12 -27 19 56 -28 20 54 0.85 - 22 0 0 -27 51 10 23 15 12.7 25 67 -30 -27 25 26 -28 17 4 -27 20 48 -28 21 46 0.85 - 21 0 0 -27 52 18 23 15 8.6 26 66 -31 -27 26 34 -28 18 13 -27 21 56 -28 22 55 0.85 - 20 0 0 -27 53 43 23 15 4.4 27 65 -31 -27 27 58 -28 19 37 -27 23 20 -28 24 19 0.85 - 19 0 0 -27 55 23 23 15 0.0 28 65 -32 -27 29 39 -28 21 18 -27 25 1 -28 26 0 0.85 - 18 0 0 -27 57 20 23 14 55.6 29 64 -32 -27 31 35 -28 23 15 -27 26 57 -28 27 57 0.85 - 17 0 0 -27 59 33 23 14 51.0 29 63 -33 -27 33 48 -28 25 28 -27 29 10 -28 30 10 0.85 - 16 0 0 -28 2 1 23 14 46.4 30 63 -33 -27 36 16 -28 27 56 -27 31 38 -28 32 39 0.85 - 15 0 0 -28 4 46 23 14 41.6 31 62 -33 -27 39 0 -28 30 41 -27 34 22 -28 35 23 0.85 - 14 0 0 -28 7 46 23 14 36.8 32 61 -34 -27 42 0 -28 33 42 -27 37 22 -28 38 24 0.85 - 13 0 0 -28 11 2 23 14 31.8 32 61 -34 -27 45 16 -28 36 58 -27 40 38 -28 41 41 0.85 - 12 0 0 -28 14 34 23 14 26.8 33 60 -34 -27 48 47 -28 40 30 -27 44 9 -28 45 13 0.86 - 11 0 0 -28 18 21 23 14 21.6 34 59 -35 -27 52 34 -28 44 18 -27 47 55 -28 49 1 0.86 - 10 0 0 -28 22 24 23 14 16.4 34 58 -35 -27 56 36 -28 48 21 -27 51 57 -28 53 4 0.86 - 9 0 0 -28 26 42 23 14 11.0 35 57 -35 -28 0 54 -28 52 40 -27 56 15 -28 57 22 0.86 - 8 0 0 -28 31 15 23 14 5.6 36 57 -35 -28 5 26 -28 57 14 -28 0 47 -29 1 56 0.86 - 7 0 0 -28 36 3 23 14 0.1 36 56 -36 -28 10 14 -29 2 3 -28 5 35 -29 6 46 0.86 - 6 0 0 -28 41 7 23 13 54.5 37 55 -36 -28 15 17 -29 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23 16 -52 25 23 1.26 Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 0175-03104-1 * constellation : Canis Minor * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 09 40.3820 DE: +06 39 57.972 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 09 40.3820 DE: +06 39 57.972 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (781) Kartvelia asteroid class: approx. diameter [km]: 72 approx. diameter ["]: 0.037 distance from Earth [AU]: 2.69330 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#61 date of fit: 2023 Aug 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): 0.009", 0.000", 80.706° remarks: * orbital elements for (781)Kartvelia : Mean anomaly = 164.0125542741 deg Arg. of pericenter = 154.4148068060 deg Long. of node = 137.9918301798 deg Inclination = 19.1414740746 deg Eccentricity = 0.1195988322 Semimajor axis = 3.2141219783 AU Perihelion dist = 2.8297167433 AU Mag: H = 9.54, G = 0.15 Epoch of elements : MJD 60293.96534722 TDT (2023 Dec 15.9653) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#612023Aug24,5.29,2023,12,15,23.172594,-0.129303,-0.640455,-7.527850,1.518473,-0.002316,0.001816,0.000001,0.000000 35.8082,6.6281,-168.78,-23.29,False TYC 0175-03104-1,7.16121722,6.6661034,0.00,11.60,0.00,0.0,0,,7.18291485,6.6280930,3.46,0.00,0,0,0 781,Kartvelia,15.01,72.000,2.6933,0,0,-1.649,4.96,,3.8,0 0,163.8474,2023,12,15,154.4148,137.9918,19.1415,0.11960,3.21412,2.82972,9.54,5.0,0.15 1.090,0.0093,0.0005,81,0.0093,Known errors,-1.00,0,-1,-1 20231215_3104-1,60232.89 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org