IOTA/IOTA-ES occultation update for (2082) Galahad / TYC 6276-01962-1 event on 2024 Apr 10, 06:21 UT Visible from Summary ------- On 2024 Apr 10 UT, the 17.129 km diameter asteroid (2082) Galahad will occult a 11.3 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.35 mag to 17.62 mag (the magnitude of the asteroid) for at most 1.660 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: 93 * date and approx. time of event: 2024 Apr 10, 06:11 - 2024 Apr 10, 06:31 * geocentric midpoint of event [JD]: 2460410.76491708 * magnitude of target star: 11.27 * magnitude drop [mag]: 6.35 * estimated maximum duration [s]: 1.660 * Moon: 4 % sunlit, 129° distance * Sun: 107° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.47 * 1 sigma uncertainty interval [seconds]: +/- 5.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.039, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.039", 0.006", 93°) * approx speed of asteroid's shadow [km/s]: 10.3108 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6276-01962-1 by 2082 Galahad on 2024 Apr 10 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 -111 0 0 - 9 37 15 6 11 23.1 1 112 -72 - 9 42 24 - 9 32 6 - 9 47 16 - 9 27 14 .... -110 0 0 -10 1 53 6 11 23.3 2 112 -73 -10 7 2 - 9 56 44 -10 11 55 - 9 51 52 0.24 -109 0 0 -10 26 34 6 11 23.8 3 112 -74 -10 31 44 -10 21 25 -10 36 36 -10 16 33 0.23 -108 0 0 -10 51 18 6 11 24.4 4 112 -74 -10 56 27 -10 46 8 -11 1 20 -10 41 16 0.23 -107 0 0 -11 16 3 6 11 25.3 5 112 -75 -11 21 12 -11 10 53 -11 26 5 -11 6 1 0.23 -106 0 0 -11 40 49 6 11 26.4 6 111 -76 -11 45 59 -11 35 39 -11 50 52 -11 30 47 0.23 -105 0 0 -12 5 36 6 11 27.7 7 111 -77 -12 10 45 -12 0 26 -12 15 38 -11 55 33 0.23 -104 0 0 -12 30 22 6 11 29.3 8 111 -78 -12 35 32 -12 25 12 -12 40 25 -12 20 19 0.23 -103 0 0 -12 55 7 6 11 31.0 9 111 -79 -13 0 17 -12 49 58 -13 5 10 -12 45 5 0.23 -102 0 0 -13 19 51 6 11 33.0 10 111 -79 -13 25 1 -13 14 42 -13 29 54 -13 9 49 0.23 -101 0 0 -13 44 33 6 11 35.1 11 110 -80 -13 49 43 -13 39 24 -13 54 36 -13 34 31 0.23 -100 0 0 -14 9 13 6 11 37.5 12 110 -81 -14 14 23 -14 4 3 -14 19 16 -13 59 10 0.23 - 99 0 0 -14 33 49 6 11 40.1 13 110 -81 -14 38 58 -14 28 39 -14 43 51 -14 23 46 0.22 - 98 0 0 -14 58 20 6 11 42.9 14 109 -81 -15 3 30 -14 53 11 -15 8 23 -14 48 18 0.22 - 97 0 0 -15 22 48 6 11 45.9 15 109 -82 -15 27 58 -15 17 38 -15 32 50 -15 12 46 0.22 - 96 0 0 -15 47 10 6 11 49.1 16 109 -82 -15 52 20 -15 42 1 -15 57 12 -15 37 8 0.22 - 95 0 0 -16 11 26 6 11 52.5 18 109 -82 -16 16 36 -16 6 17 -16 21 29 -16 1 25 0.22 - 94 0 0 -16 35 36 6 11 56.1 19 108 -81 -16 40 46 -16 30 27 -16 45 38 -16 25 35 0.22 - 93 0 0 -16 59 39 6 11 59.9 20 108 -81 -17 4 49 -16 54 30 -17 9 41 -16 49 38 0.22 - 92 0 0 -17 23 35 6 12 3.9 21 108 -81 -17 28 44 -17 18 26 -17 33 36 -17 13 34 0.22 - 91 0 0 -17 47 22 6 12 8.1 22 107 -80 -17 52 31 -17 42 13 -17 57 23 -17 37 21 0.22 - 90 0 0 -18 11 0 6 12 12.4 23 107 -80 -18 16 9 -18 5 52 -18 21 1 -18 1 0 0.22 - 89 0 0 -18 34 30 6 12 17.0 24 107 -79 -18 39 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-12 45 21 -13 0 33 -12 40 28 0.41 72 0 0 -12 25 54 6 31 34.6 0 247 67 -12 31 3 -12 20 44 -12 35 56 -12 15 52 0.95 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: TYC 6276-01962-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 15 13.1378 DE: -22 06 26.132 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 15 13.1379 DE: -22 06 26.132 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * B mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2082) Galahad asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.012 distance from Earth [AU]: 1.95730 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#41 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): 0.039", 0.006", 92.6° remarks: * orbital elements for (2082)Galahad : Mean anomaly = 11.2214307454 deg Arg. of pericenter = 144.5145883658 deg Long. of node = 90.0423223393 deg Inclination = 3.0678551172 deg Eccentricity = 0.1668627708 Semimajor axis = 2.9198043818 AU Perihelion dist = 2.4325977324 AU Mag: H = 13.12, G = 0.15 Epoch of elements : MJD 60410.26491675 TDT (2024 Apr 10.2649) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#412023Apr24,1.66,2024,4,10,6.358010,-0.005342,-0.201912,5.817603,-0.156828,-0.005371,-0.000194,0.000000,0.000000 -20.1766,-22.1005,84.94,8.15,False TYC 6276-01962-1,18.25364937,-22.1072588,11.38,11.27,11.21,0.0,0,,18.27804208,-22.1005395,6.35,5.96,0,0,0 2082,Galahad,17.62,17.129,1.9573,0,0,1.881,-0.70,,1.6,0 0,11.1691,2024,4,10,144.5146,90.0423,3.0679,0.16686,2.91980,2.43260,13.12,5.0,0.15 1.473,0.0387,0.0057,93,0.0057,Known errors,0.68,0,-1,-1 20240410_1962-1,60139.28 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org