IOTA/IOTA-ES occultation update for (1234) Elyna / TYC 6867-01814-1 event on 2024 Jul 02, 03:24 UT Visible from Summary ------- On 2024 Jul 02 UT, the 26.037 km diameter asteroid (1234) Elyna 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 3.88 mag to 15.10 mag (the magnitude of the asteroid) for at most 2.000 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: 96 * date and approx. time of event: 2024 Jul 02, 03:16 - 2024 Jul 02, 03:32 * geocentric midpoint of event [JD]: 2460493.64180200 * magnitude of target star: 11.25 * magnitude drop [mag]: 3.88 * estimated maximum duration [s]: 2.000 * Moon: 16 % sunlit, 133° distance * Sun: 175° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.003", 77°) * approx speed of asteroid's shadow [km/s]: 13.0413 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6867-01814-1 by 1234 Elyna on 2024 Jul 2 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 -134 0 0 12 16 5 3 32 14.1 0 119 -2 12 24 17 12 7 53 12 30 58 12 1 12 .... -133 0 0 11 43 34 3 32 14.0 2 119 -4 11 51 46 11 35 22 11 58 27 11 28 41 -0.01 -132 0 0 11 10 59 3 32 13.6 3 119 -5 11 19 11 11 2 48 11 25 53 10 56 7 -0.08 -131 0 0 10 38 22 3 32 13.1 4 119 -6 10 46 34 10 30 11 10 53 15 10 23 29 -0.11 -130 0 0 10 5 43 3 32 12.3 5 120 -7 10 13 55 9 57 31 10 20 36 9 50 50 -0.13 -129 0 0 9 33 3 3 32 11.4 6 120 -8 9 41 14 9 24 52 9 47 56 9 18 11 -0.14 -128 0 0 9 0 23 3 32 10.3 7 120 -9 9 8 34 8 52 12 9 15 16 8 45 31 -0.15 -127 0 0 8 27 44 3 32 9.0 8 120 -10 8 35 55 8 19 34 8 42 36 8 12 53 -0.15 -126 0 0 7 55 8 3 32 7.5 9 120 -11 8 3 18 7 46 57 8 9 59 7 40 17 -0.15 -125 0 0 7 22 34 3 32 5.8 11 120 -13 7 30 44 7 14 24 7 37 25 7 7 44 -0.16 -124 0 0 6 50 4 3 32 3.9 12 121 -14 6 58 14 6 41 54 7 4 54 6 35 14 -0.16 -123 0 0 6 17 39 3 32 1.9 13 121 -15 6 25 48 6 9 29 6 32 28 6 2 50 -0.16 -122 0 0 5 45 19 3 31 59.6 14 121 -16 5 53 28 5 37 10 6 0 8 5 30 32 -0.16 -121 0 0 5 13 7 3 31 57.2 15 121 -17 5 21 15 5 4 58 5 27 54 4 58 20 -0.16 -120 0 0 4 41 1 3 31 54.6 16 121 -18 4 49 9 4 32 54 4 55 48 4 26 15 -0.17 -119 0 0 4 9 5 3 31 51.8 17 121 -19 4 17 12 4 0 57 4 23 50 3 54 20 -0.17 -118 0 0 3 37 17 3 31 48.9 18 121 -20 3 45 24 3 29 10 3 52 1 3 22 33 -0.17 -117 0 0 3 5 40 3 31 45.7 20 121 -21 3 13 46 2 57 34 3 20 23 2 50 57 -0.17 -116 0 0 2 34 13 3 31 42.4 21 121 -23 2 42 19 2 26 8 2 48 55 2 19 32 -0.17 -115 0 0 2 2 58 3 31 38.9 22 121 -24 2 11 3 1 54 54 2 17 39 1 48 18 -0.17 -114 0 0 1 31 56 3 31 35.3 23 121 -25 1 40 0 1 23 52 1 46 35 1 17 17 -0.17 -113 0 0 1 1 7 3 31 31.5 24 122 -26 1 9 10 0 53 4 1 15 45 0 46 30 -0.17 -112 0 0 0 30 32 3 31 27.5 25 122 -27 0 38 34 0 22 30 0 45 8 0 15 56 -0.17 -111 0 0 0 0 12 3 31 23.4 26 122 -28 0 8 13 - 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5 32 57 - 5 48 37 - 5 26 34 - 5 55 1 -0.17 - 98 0 0 - 6 7 1 3 30 16.9 40 122 -42 - 5 59 11 - 6 14 49 - 5 52 48 - 6 21 12 -0.17 - 97 0 0 - 6 32 51 3 30 11.0 41 122 -43 - 6 25 3 - 6 40 39 - 6 18 41 - 6 47 1 -0.17 - 96 0 0 - 6 58 19 3 30 4.9 42 122 -44 - 6 50 32 - 7 6 5 - 6 44 10 - 7 12 26 -0.17 - 95 0 0 - 7 23 23 3 29 58.7 43 122 -45 - 7 15 37 - 7 31 9 - 7 9 17 - 7 37 29 -0.17 - 94 0 0 - 7 48 4 3 29 52.4 44 122 -46 - 7 40 19 - 7 55 48 - 7 33 59 - 8 2 8 -0.17 - 93 0 0 - 8 12 21 3 29 46.1 45 122 -47 - 8 4 37 - 8 20 4 - 7 58 18 - 8 26 23 -0.17 - 92 0 0 - 8 36 14 3 29 39.6 46 122 -49 - 8 28 31 - 8 43 56 - 8 22 13 - 8 50 14 -0.17 - 91 0 0 - 8 59 42 3 29 33.0 47 122 -50 - 8 52 0 - 9 7 23 - 8 45 43 - 9 13 40 -0.17 - 90 0 0 - 9 22 45 3 29 26.4 48 122 -51 - 9 15 5 - 9 30 26 - 9 8 49 - 9 36 42 -0.17 - 89 0 0 - 9 45 24 3 29 19.7 49 122 -52 - 9 37 44 - 9 53 3 - 9 31 29 - 9 59 18 -0.17 - 88 0 0 -10 7 37 3 29 12.9 50 122 -53 - 9 59 59 -10 15 16 - 9 53 44 -10 21 30 -0.17 - 87 0 0 -10 29 25 3 29 6.0 51 122 -54 -10 21 48 -10 37 3 -10 15 34 -10 43 16 -0.17 - 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1 0 0 -13 45 13 3 18 31.1 44 244 -44 -13 37 45 -13 52 41 -13 31 39 -13 58 46 -0.17 0 0 0 -13 27 43 3 18 25.1 43 244 -43 -13 20 14 -13 35 12 -13 14 8 -13 41 18 -0.17 1 0 0 -13 9 47 3 18 19.3 42 244 -42 -13 2 17 -13 17 16 -12 56 9 -13 23 23 -0.17 2 0 0 -12 51 23 3 18 13.5 41 244 -41 -12 43 52 -12 58 53 -12 37 43 -13 5 1 -0.17 3 0 0 -12 32 32 3 18 7.8 40 244 -40 -12 25 0 -12 40 3 -12 18 51 -12 46 12 -0.17 4 0 0 -12 13 13 3 18 2.2 39 243 -39 -12 5 40 -12 20 46 -11 59 31 -12 26 56 -0.17 5 0 0 -11 53 28 3 17 56.7 38 243 -38 -11 45 54 -12 1 2 -11 39 44 -12 7 12 -0.17 6 0 0 -11 33 16 3 17 51.4 37 243 -37 -11 25 41 -11 40 51 -11 19 30 -11 47 2 -0.17 7 0 0 -11 12 37 3 17 46.1 36 243 -36 -11 5 1 -11 20 13 -10 58 49 -11 26 25 -0.17 8 0 0 -10 51 32 3 17 40.9 35 243 -35 -10 43 55 -10 59 9 -10 37 42 -11 5 22 -0.17 9 0 0 -10 30 0 3 17 35.8 34 243 -34 -10 22 22 -10 37 38 -10 16 8 -10 43 52 -0.17 10 0 0 -10 8 2 3 17 30.9 33 243 -33 -10 0 23 -10 15 41 - 9 54 8 -10 21 56 -0.17 11 0 0 - 9 45 38 3 17 26.0 32 243 -32 - 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4 30 9 - 4 58 48 -0.18 24 0 0 - 4 16 52 3 16 34.9 19 242 -18 - 4 8 57 - 4 24 46 - 4 2 30 - 4 31 13 -0.18 25 0 0 - 3 48 53 3 16 31.9 17 242 -17 - 3 40 58 - 3 56 48 - 3 34 29 - 4 3 16 -0.18 26 0 0 - 3 20 34 3 16 29.2 16 242 -16 - 3 12 37 - 3 28 30 - 3 6 8 - 3 34 58 -0.18 27 0 0 - 2 51 54 3 16 26.6 15 242 -15 - 2 43 57 - 2 59 51 - 2 37 27 - 3 6 21 -0.18 28 0 0 - 2 22 55 3 16 24.2 14 242 -14 - 2 14 56 - 2 30 53 - 2 8 25 - 2 37 23 -0.18 29 0 0 - 1 53 36 3 16 22.0 13 242 -13 - 1 45 37 - 2 1 35 - 1 39 5 - 2 8 6 -0.18 30 0 0 - 1 23 59 3 16 19.9 12 242 -12 - 1 15 59 - 1 31 59 - 1 9 26 - 1 38 31 -0.18 31 0 0 - 0 54 4 3 16 18.0 11 242 -10 - 0 46 3 - 1 2 5 - 0 39 29 - 1 8 37 -0.18 32 0 0 - 0 23 51 3 16 16.3 10 242 -9 - 0 15 49 - 0 31 53 - 0 9 15 - 0 38 27 -0.18 33 0 0 0 6 37 3 16 14.7 9 242 -8 0 14 40 - 0 1 25 0 21 15 - 0 7 59 -0.18 34 0 0 0 37 22 3 16 13.4 7 242 -7 0 45 26 0 29 18 0 52 1 0 22 44 -0.17 35 0 0 1 8 22 3 16 12.2 6 242 -6 1 16 27 1 0 17 1 23 3 0 53 42 -0.17 36 0 0 1 39 36 3 16 11.2 5 242 -5 1 47 42 1 31 31 1 54 18 1 24 55 -0.17 37 0 0 2 11 4 3 16 10.4 4 242 -4 2 19 10 2 2 58 2 25 47 1 56 21 -0.17 38 0 0 2 42 44 3 16 9.8 3 242 -3 2 50 51 2 34 37 2 57 29 2 28 0 -0.16 39 0 0 3 14 37 3 16 9.4 2 242 -1 3 22 44 3 6 29 3 29 23 2 59 51 -0.15 40 0 0 3 46 40 3 16 9.2 1 242 0 3 54 48 3 38 32 4 1 27 3 31 53 -0.10 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6867-01814-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 48 37.6897 DE: -28 06 34.746 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 48 37.6897 DE: -28 06 34.746 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.3 * B mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1234) Elyna asteroid class: approx. diameter [km]: 26 approx. diameter ["]: 0.017 distance from Earth [AU]: 2.08990 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.021", 0.003", 76.824° remarks: * orbital elements for (1234)Elyna : Mean anomaly = 254.7096096768 deg Arg. of pericenter = 90.7014063241 deg Long. of node = 304.3140560004 deg Inclination = 8.5278858308 deg Eccentricity = 0.0871172908 Semimajor axis = 3.0141607406 AU Perihelion dist = 2.7515752229 AU Mag: H = 10.84, G = 0.15 Epoch of elements : MJD 60493.14180229 TDT (2024 Jul 02.1418) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,2.00,2024,7,2,3.403248,0.013434,0.162421,-7.335839,0.606871,-0.000103,0.000495,0.000001,0.000000 -49.1661,-28.0823,129.98,23.00,False TYC 6867-01814-1,18.81046936,-28.1096516,11.46,11.25,11.14,0.0,0,,18.83651537,-28.0823379,3.88,3.56,0,0,0 1234,Elyna,15.10,26.037,2.0899,0,0,-2.332,2.56,,1.6,0 0,254.6829,2024,7,2,90.7014,304.3141,8.5279,0.08712,3.01416,2.75158,10.83,5.0,0.15 1.408,0.0210,0.0029,77,0.0070,Known errors,1.81,0,-1,-1 20240702_1814-1,60140.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org