IOTA/IOTA-ES occultation update for (1456) Saldanha / TYC 6876-00181-1 event on 2023 Jun 06, 17:03 UT Visible from New Zealand, Australia Summary ------- On 2023 Jun 06 UT, the 43.3 km diameter asteroid (1456) Saldanha will occult a 12.5 mag star in the constellation Sagittarius 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 3.12 mag to 15.53 mag (the magnitude of the asteroid) for at most 7.110 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: 86 * date and approx. time of event: 2023 Jun 06, 16:46 - 2023 Jun 06, 17:20 * geocentric midpoint of event [JD]: 2460102.21071138 * magnitude of target star: 12.47 * magnitude drop [mag]: 3.12 * estimated maximum duration [s]: 7.110 * Moon: 91 % sunlit, 4° distance * Sun: 144° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 44 * 1 sigma uncertainty interval [path widths]: +/- 0.59 * 1 sigma uncertainty interval [seconds]: +/- 4.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.026, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.027", 0.006", 71°) * approx speed of asteroid's shadow [km/s]: 6.0888 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6876-00181-1 by 1456 Saldanha on 2023 Jun 6 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 52 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 8 42 6 .. .. .. 8 26 44 .... 53 0 0 8 29 38 17 20 29.6 1 113 -35 8 42 37 8 16 38 8 57 59 8 1 15 .... 54 0 0 8 3 46 17 20 29.1 2 113 -36 8 16 47 7 50 44 8 32 11 7 35 18 0.20 55 0 0 7 37 27 17 20 28.2 3 113 -37 7 50 30 7 24 23 8 5 56 7 8 55 0.19 56 0 0 7 10 42 17 20 26.9 4 113 -38 7 23 47 6 57 36 7 39 15 6 42 6 0.19 57 0 0 6 43 31 17 20 25.2 5 114 -39 6 56 38 6 30 24 7 12 9 6 14 51 0.19 58 0 0 6 15 56 17 20 23.1 6 114 -40 6 29 5 6 2 47 6 44 38 5 47 11 0.19 59 0 0 5 47 56 17 20 20.7 7 114 -41 6 1 7 5 34 45 6 16 42 5 19 8 0.19 60 0 0 5 19 33 17 20 17.8 9 114 -42 5 32 45 5 6 20 5 48 22 4 50 40 0.18 61 0 0 4 50 46 17 20 14.6 10 114 -43 5 4 0 4 37 31 5 19 40 4 21 49 0.18 62 0 0 4 21 37 17 20 11.0 11 114 -44 4 34 52 4 8 20 4 50 34 3 52 36 0.18 63 0 0 3 52 5 17 20 7.0 12 114 -45 4 5 23 3 38 47 4 21 7 3 23 1 0.18 64 0 0 3 22 13 17 20 2.6 13 114 -47 3 35 32 3 8 53 3 51 18 2 53 5 0.18 65 0 0 2 52 0 17 19 57.8 14 114 -48 3 5 21 2 38 38 3 21 9 2 22 48 0.18 66 0 0 2 21 27 17 19 52.6 15 114 -49 2 34 50 2 8 4 2 50 40 1 52 11 0.18 67 0 0 1 50 35 17 19 47.0 16 114 -50 2 4 0 1 37 10 2 19 51 1 21 16 0.18 68 0 0 1 19 25 17 19 41.1 17 114 -51 1 32 51 1 5 58 1 48 45 0 50 2 0.18 69 0 0 0 47 57 17 19 34.7 18 114 -52 1 1 25 0 34 29 1 17 20 0 18 31 0.18 70 0 0 0 16 13 17 19 28.0 20 114 -53 0 29 42 0 2 43 0 45 39 - 0 13 17 0.18 71 0 0 - 0 15 48 17 19 20.9 21 114 -54 - 0 2 17 - 0 29 19 0 13 42 - 0 45 20 0.18 72 0 0 - 0 48 3 17 19 13.4 22 114 -55 - 0 34 31 - 1 1 36 - 0 18 31 - 1 17 39 0.18 73 0 0 - 1 20 33 17 19 5.6 23 114 -56 - 1 7 0 - 1 34 7 - 0 50 58 - 1 50 12 0.18 74 0 0 - 1 53 17 17 18 57.3 24 114 -57 - 1 39 42 - 2 6 52 - 1 23 38 - 2 22 58 0.18 75 0 0 - 2 26 13 17 18 48.8 25 114 -58 - 2 12 37 - 2 39 49 - 1 56 31 - 2 55 57 0.18 76 0 0 - 2 59 20 17 18 39.8 26 114 -60 - 2 45 43 - 3 12 58 - 2 29 36 - 3 29 7 0.18 77 0 0 - 3 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16 46 25.3 5 246 22 -32 42 43 -33 8 57 -32 27 12 -33 24 31 0.23 -113 0 0 -32 32 15 16 46 23.9 4 246 22 -32 19 5 -32 45 25 -32 3 32 -33 1 1 0.24 -112 0 0 -32 8 10 16 46 22.8 3 245 23 -31 54 59 -32 21 22 -31 39 22 -32 37 1 0.26 -111 0 0 -31 43 36 16 46 22.0 2 245 24 -31 30 22 -31 56 50 -31 14 42 -32 12 32 0.29 -110 0 0 -31 18 31 16 46 21.5 1 244 25 -31 5 15 -31 31 48 -30 49 33 -31 47 33 0.39 -109 0 0 -30 52 57 16 46 21.3 0 244 26 -30 39 39 -31 6 17 .. .. .. -31 22 4 1.40 Uncertainty in time = +/- 6 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 6876-00181-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 31 56.1921 DE: -22 41 01.807 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 31 56.1922 DE: -22 41 01.807 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1456) Saldanha asteroid class: approx. diameter [km]: 43 approx. diameter ["]: 0.031 distance from Earth [AU]: 1.93490 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.027", 0.006", 71.037° remarks: * orbital elements for (1456)Saldanha : Mean anomaly = 313.2111615711 deg Arg. of pericenter = 65.5002658547 deg Long. of node = 282.4070393344 deg Inclination = 10.4390650085 deg Eccentricity = 0.2212336896 Semimajor axis = 3.2026892598 AU Perihelion dist = 2.4941464984 AU Mag: H = 11.08, G = 0.15 Epoch of elements : MJD 60101.71055556 TDT (2023 Jun 06.7106) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr24,7.11,2023,6,6,17.057073,-0.076115,-0.192555,-3.196840,1.261437,-0.003226,-0.000439,0.000001,0.000000 142.6302,-22.6340,-76.18,22.68,False TYC 6876-00181-1,19.53227558,-22.6838353,0.00,12.47,0.00,0.0,0,,19.55578435,-22.6340112,3.12,0.00,0,0,0 1456,Saldanha,15.53,43.3,1.9349,0,0,-1.049,5.73,,2.2,0 0,313.0890,2023,6,6,65.5003,282.4070,10.4391,0.22123,3.20269,2.49415,11.11,5.0,0.15 1.592,0.0273,0.0057,71,0.0183,Known errors,-1.00,-1,-1,-1 20230606_0181-1,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org