IOTA/IOTA-ES occultation update for (234) Barbara / TYC 784-00094-1 event on 2024 Sep 24, 23:41 UT Visible from Summary ------- On 2024 Sep 24 UT, the 45.8280883263451 km diameter asteroid (234) Barbara will occult a 8.9 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.57 mag to 14.41 mag (the magnitude of the asteroid) for at most 1.690 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: 99 * date and approx. time of event: 2024 Sep 24, 23:37 - 2024 Sep 24, 23:45 * geocentric midpoint of event [JD]: 2460578.48742133 * magnitude of target star: 8.85 * magnitude drop [mag]: 5.57 * estimated maximum duration [s]: 1.690 * Moon: 47 % sunlit, 28° distance * Sun: 64° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 46 * 1 sigma uncertainty interval [path widths]: +/- 0.20 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.003", 86°) * approx speed of asteroid's shadow [km/s]: 27.3013 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 784-00094-1 by 234 Barbara on 2024 Sep 24 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 28 0 0 15 23 8 23 38 0.1 0 79 -62 15 10 25 15 35 51 15 5 20 15 40 56 .... 29 0 0 15 34 0 23 38 0.1 1 80 -61 15 21 17 15 46 43 15 16 13 15 51 47 -0.08 30 0 0 15 44 38 23 38 0.3 2 80 -60 15 31 56 15 57 20 15 26 52 16 2 24 -0.07 31 0 0 15 55 1 23 38 0.5 3 80 -59 15 42 20 16 7 43 15 37 16 16 12 47 -0.06 32 0 0 16 5 10 23 38 0.7 4 80 -58 15 52 29 16 17 51 15 47 26 16 22 55 -0.06 33 0 0 16 15 5 23 38 1.1 5 81 -57 16 2 24 16 27 46 15 57 21 16 32 49 -0.06 34 0 0 16 24 45 23 38 1.5 6 81 -56 16 12 5 16 37 25 16 7 2 16 42 28 -0.06 35 0 0 16 34 10 23 38 1.9 7 81 -55 16 21 31 16 46 49 16 16 28 16 51 53 -0.06 36 0 0 16 43 20 23 38 2.5 8 82 -54 16 30 41 16 55 59 16 25 38 17 1 2 -0.06 37 0 0 16 52 15 23 38 3.1 9 82 -53 16 39 37 17 4 54 16 34 34 17 9 56 -0.06 38 0 0 17 0 55 23 38 3.7 10 82 -52 16 48 17 17 13 33 16 43 15 17 18 36 -0.06 39 0 0 17 9 20 23 38 4.5 11 82 -51 16 56 42 17 21 57 16 51 40 17 27 0 -0.05 40 0 0 17 17 29 23 38 5.3 12 83 -50 17 4 52 17 30 6 16 59 50 17 35 8 -0.05 41 0 0 17 25 22 23 38 6.1 13 83 -50 17 12 46 17 37 59 17 7 44 17 43 1 -0.05 42 0 0 17 33 0 23 38 7.0 14 83 -49 17 20 24 17 45 37 17 15 23 17 50 38 -0.05 43 0 0 17 40 23 23 38 8.0 15 84 -48 17 27 47 17 52 58 17 22 46 17 58 0 -0.05 44 0 0 17 47 29 23 38 9.1 16 84 -47 17 34 54 18 0 4 17 29 53 18 5 6 -0.05 45 0 0 17 54 20 23 38 10.2 17 84 -46 17 41 45 18 6 55 17 36 44 18 11 56 -0.05 46 0 0 18 0 54 23 38 11.4 18 85 -45 17 48 20 18 13 29 17 43 19 18 18 30 -0.05 47 0 0 18 7 13 23 38 12.6 19 85 -44 17 54 39 18 19 47 17 49 38 18 24 48 -0.05 48 0 0 18 13 15 23 38 13.9 20 85 -43 18 0 41 18 25 49 17 55 41 18 30 49 -0.05 49 0 0 18 19 1 23 38 15.3 21 86 -42 18 6 28 18 31 34 18 1 27 18 36 35 -0.05 50 0 0 18 24 31 23 38 16.7 22 86 -41 18 11 58 18 37 4 18 6 57 18 42 4 -0.05 51 0 0 18 29 44 23 38 18.2 23 86 -40 18 17 11 18 42 17 18 12 11 18 47 17 -0.05 52 0 0 18 34 41 23 38 19.7 24 86 -39 18 22 9 18 47 13 18 17 9 18 52 14 -0.05 53 0 0 18 39 21 23 38 21.3 25 87 -38 18 26 49 18 51 53 18 21 49 18 56 54 -0.05 54 0 0 18 43 45 23 38 22.9 26 87 -37 18 31 14 18 56 17 18 26 14 19 1 17 -0.05 55 0 0 18 47 52 23 38 24.7 26 87 -36 18 35 21 19 0 24 18 30 21 19 5 24 -0.05 56 0 0 18 51 43 23 38 26.4 27 88 -35 18 39 12 19 4 14 18 34 12 19 9 14 -0.05 57 0 0 18 55 17 23 38 28.3 28 88 -34 18 42 46 19 7 48 18 37 46 19 12 47 -0.05 58 0 0 18 58 34 23 38 30.1 29 88 -33 18 46 3 19 11 5 18 41 4 19 16 4 -0.05 59 0 0 19 1 34 23 38 32.1 30 89 -33 18 49 4 19 14 5 18 44 4 19 19 4 -0.05 60 0 0 19 4 17 23 38 34.1 31 89 -32 18 51 47 19 16 48 18 46 48 19 21 47 -0.05 61 0 0 19 6 44 23 38 36.1 32 90 -31 18 54 14 19 19 14 18 49 15 19 24 14 -0.05 62 0 0 19 8 54 23 38 38.2 33 90 -30 18 56 23 19 21 24 18 51 24 19 26 23 -0.05 63 0 0 19 10 46 23 38 40.4 34 90 -29 18 58 16 19 23 16 18 53 17 19 28 15 -0.05 64 0 0 19 12 22 23 38 42.6 35 91 -28 18 59 52 19 24 52 18 54 53 19 29 51 -0.05 65 0 0 19 13 40 23 38 44.9 36 91 -27 19 1 11 19 26 10 18 56 12 19 31 9 -0.05 66 0 0 19 14 42 23 38 47.2 37 91 -26 19 2 12 19 27 12 18 57 13 19 32 11 -0.05 67 0 0 19 15 27 23 38 49.5 38 92 -25 19 2 57 19 27 56 18 57 58 19 32 55 -0.05 68 0 0 19 15 54 23 38 52.0 39 92 -24 19 3 25 19 28 24 18 58 26 19 33 23 -0.05 69 0 0 19 16 4 23 38 54.4 40 92 -23 19 3 35 19 28 34 18 58 36 19 33 33 -0.05 70 0 0 19 15 58 23 38 57.0 41 93 -22 19 3 28 19 28 27 18 58 29 19 33 27 -0.05 71 0 0 19 15 34 23 38 59.5 42 93 -21 19 3 4 19 28 4 18 58 5 19 33 3 -0.05 72 0 0 19 14 53 23 39 2.1 43 93 -20 19 2 23 19 27 23 18 57 24 19 32 22 -0.05 73 0 0 19 13 55 23 39 4.8 44 94 -19 19 1 25 19 26 25 18 56 26 19 31 24 -0.05 74 0 0 19 12 40 23 39 7.5 45 94 -18 19 0 10 19 25 10 18 55 11 19 30 9 -0.05 75 0 0 19 11 8 23 39 10.3 46 95 -17 18 58 38 19 23 38 18 53 39 19 28 37 -0.05 76 0 0 19 9 18 23 39 13.1 47 95 -16 18 56 48 19 21 48 18 51 49 19 26 48 -0.05 77 0 0 19 7 12 23 39 16.0 47 95 -16 18 54 42 19 19 42 18 49 42 19 24 41 -0.05 78 0 0 19 4 48 23 39 18.9 48 96 -15 18 52 18 19 17 19 18 47 19 19 22 18 -0.05 79 0 0 19 2 8 23 39 21.8 49 96 -14 18 49 37 19 14 38 18 44 38 19 19 38 -0.05 80 0 0 18 59 10 23 39 24.8 50 97 -13 18 46 39 19 11 41 18 41 40 19 16 40 -0.05 81 0 0 18 55 55 23 39 27.8 51 97 -12 18 43 24 19 8 26 18 38 25 19 13 26 -0.05 82 0 0 18 52 23 23 39 30.9 52 97 -11 18 39 52 19 4 54 18 34 52 19 9 54 -0.05 83 0 0 18 48 34 23 39 34.1 53 98 -10 18 36 3 19 1 6 18 31 3 19 6 6 -0.05 84 0 0 18 44 29 23 39 37.2 54 98 -9 18 31 57 18 57 0 18 26 57 19 2 0 -0.05 85 0 0 18 40 6 23 39 40.4 55 99 -8 18 27 34 18 52 38 18 22 34 18 57 38 -0.05 86 0 0 18 35 26 23 39 43.7 56 99 -7 18 22 54 18 47 59 18 17 54 18 52 59 -0.05 87 0 0 18 30 30 23 39 47.0 57 99 -6 18 17 57 18 43 2 18 12 57 18 48 3 -0.05 88 0 0 18 25 16 23 39 50.3 58 100 -5 18 12 44 18 37 49 18 7 43 18 42 50 -0.05 89 0 0 18 19 46 23 39 53.7 59 100 -4 18 7 13 18 32 20 18 2 13 18 37 20 -0.05 90 0 0 18 14 0 23 39 57.1 60 101 -3 18 1 26 18 26 33 17 56 25 18 31 34 -0.05 91 0 0 18 7 56 23 40 0.5 61 101 -2 17 55 22 18 20 30 17 50 21 18 25 31 -0.05 92 0 0 18 1 36 23 40 4.0 62 102 -1 17 49 2 18 14 10 17 44 1 18 19 11 -0.05 93 0 0 17 54 59 23 40 7.5 63 102 0 17 42 24 18 7 34 17 37 23 18 12 35 -0.05 94 0 0 17 48 6 23 40 11.0 64 103 1 17 35 31 18 0 41 17 30 30 18 5 43 -0.05 95 0 0 17 40 56 23 40 14.6 65 103 2 17 28 21 17 53 32 17 23 19 17 58 34 -0.05 96 0 0 17 33 30 23 40 18.2 66 104 3 17 20 54 17 46 7 17 15 53 17 51 8 -0.05 97 0 0 17 25 48 23 40 21.9 67 104 4 17 13 12 17 38 25 17 8 10 17 43 27 -0.05 98 0 0 17 17 50 23 40 25.6 68 105 5 17 5 13 17 30 27 17 0 11 17 35 29 -0.05 99 0 0 17 9 35 23 40 29.3 69 106 6 16 56 58 17 22 13 16 51 56 17 27 15 -0.05 100 0 0 17 1 5 23 40 33.0 70 106 7 16 48 27 17 13 43 16 43 24 17 18 45 -0.05 101 0 0 16 52 18 23 40 36.8 71 107 8 16 39 40 17 4 57 16 34 37 17 10 0 -0.05 102 0 0 16 43 16 23 40 40.6 72 108 9 16 30 37 16 55 55 16 25 34 17 0 58 -0.05 103 0 0 16 33 58 23 40 44.4 73 108 10 16 21 19 16 46 38 16 16 16 16 51 41 -0.05 104 0 0 16 24 25 23 40 48.3 74 109 11 16 11 44 16 37 5 16 6 41 16 42 8 -0.05 105 0 0 16 14 36 23 40 52.2 74 110 12 16 1 55 16 27 16 15 56 51 16 32 20 -0.05 106 0 0 16 4 31 23 40 56.1 75 111 13 15 51 50 16 17 13 15 46 46 16 22 16 -0.05 107 0 0 15 54 12 23 41 0.0 76 112 14 15 41 30 16 6 54 15 36 26 16 11 58 -0.05 108 0 0 15 43 37 23 41 4.0 77 113 14 15 30 55 15 56 20 15 25 51 16 1 24 -0.05 109 0 0 15 32 48 23 41 7.9 78 115 15 15 20 5 15 45 31 15 15 0 15 50 35 -0.05 110 0 0 15 21 43 23 41 11.9 79 116 16 15 9 0 15 34 27 15 3 55 15 39 32 -0.05 111 0 0 15 10 24 23 41 16.0 80 118 17 14 57 40 15 23 8 14 52 35 15 28 13 -0.05 112 0 0 14 58 51 23 41 20.0 81 120 18 14 46 6 15 11 36 14 41 1 15 16 41 -0.05 113 0 0 14 47 3 23 41 24.0 82 123 19 14 34 18 14 59 48 14 29 12 15 4 54 -0.05 114 0 0 14 35 1 23 41 28.1 83 126 20 14 22 15 14 47 47 14 17 10 14 52 53 -0.05 115 0 0 14 22 45 23 41 32.2 84 131 21 14 9 59 14 35 32 14 4 53 14 40 38 -0.05 116 0 0 14 10 16 23 41 36.3 85 136 22 13 57 29 14 23 3 13 52 23 14 28 9 -0.05 117 0 0 13 57 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45 46.6 1 281 64 - 9 42 27 - 9 17 0 - 9 47 32 - 9 11 56 -0.18 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 784-00094-1 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 55 42.4544 DE: +10 26 40.359 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 55 42.4547 DE: +10 26 40.359 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 8.9 * B mag [mag]: 9.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (234) Barbara asteroid class: Barbarian approx. diameter [km]: 46 approx. diameter ["]: 0.022 distance from Earth [AU]: 2.83910 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#102 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): 0.012", 0.003", 86.333° remarks: * orbital elements for (234)Barbara : Mean anomaly = 93.4942842403 deg Arg. of pericenter = 192.4123230331 deg Long. of node = 144.4459556750 deg Inclination = 15.3768741641 deg Eccentricity = 0.2456065684 Semimajor axis = 2.3857576018 AU Perihelion dist = 1.7997998642 AU Mag: H = 9.10, G = 0.15 Epoch of elements : MJD 60577.98742130 TDT (2024 Sep 24.9874) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1022023Apr24,1.69,2024,9,24,23.698112,0.010362,0.049017,15.038217,-3.362736,-0.005000,0.000542,-0.000001,0.000000 119.4984,10.3814,-177.55,-0.96,False TYC 784-00094-1,7.92845952,10.4445442,8.98,8.85,8.78,0.1,0,,7.95088378,10.3813743,5.57,5.19,0,0,0 234,Barbara,14.41,46.034,2.8391,0,0,3.158,-10.42,,2.6,0 0,93.2302,2024,9,24,192.4123,144.4460,15.3769,0.24561,2.38576,1.79980,9.09,5.0,0.15 1.199,0.0123,0.0029,86,0.0045,Known errors,1.02,0,-1,-1 20240924_0094-1,60140.58 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org