IOTA/IOTA-ES occultation update for (7037) Davidlean / UCAC4 356-164713 event on 2024 Oct 12, 17:35 UT Visible from Summary ------- On 2024 Oct 12 UT, the 17.4077714779145 km diameter asteroid (7037) Davidlean will occult a 11.8 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 6.08 mag to 17.87 mag (the magnitude of the asteroid) for at most 0.830 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: 98 * date and approx. time of event: 2024 Oct 12, 17:30 - 2024 Oct 12, 17:40 * geocentric midpoint of event [JD]: 2460596.23282396 * magnitude of target star: 11.79 * magnitude drop [mag]: 6.08 * estimated maximum duration [s]: 0.830 * Moon: 71 % sunlit, 34° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.001", 73°) * approx speed of asteroid's shadow [km/s]: 21.1832 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 356-164713 by 7037 Davidlean on 2024 Oct 12 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 - 94 0 0 - 7 43 7 17 30 15.0 1 109 82 - 7 48 10 - 7 38 4 - 7 51 51 - 7 34 22 .... - 93 0 0 - 8 3 31 17 30 15.1 2 109 83 - 8 8 34 - 7 58 28 - 8 12 15 - 7 54 47 0.07 - 92 0 0 - 8 23 44 17 30 15.4 3 109 84 - 8 28 47 - 8 18 42 - 8 32 28 - 8 15 1 0.04 - 91 0 0 - 8 43 46 17 30 15.7 4 108 85 - 8 48 49 - 8 38 44 - 8 52 29 - 8 35 3 0.03 - 90 0 0 - 9 3 36 17 30 16.1 5 108 86 - 9 8 39 - 8 58 34 - 9 12 19 - 8 54 54 0.02 - 89 0 0 - 9 23 14 17 30 16.6 6 108 87 - 9 28 16 - 9 18 12 - 9 31 56 - 9 14 32 0.02 - 88 0 0 - 9 42 39 17 30 17.2 7 108 87 - 9 47 41 - 9 37 38 - 9 51 21 - 9 33 58 0.01 - 87 0 0 -10 1 51 17 30 17.9 8 108 87 -10 6 53 - 9 56 50 -10 10 33 - 9 53 10 0.01 - 86 0 0 -10 20 50 17 30 18.7 9 108 87 -10 25 51 -10 15 49 -10 29 31 -10 12 10 0.01 - 85 0 0 -10 39 35 17 30 19.6 10 107 87 -10 44 36 -10 34 35 -10 48 15 -10 30 55 0.01 - 84 0 0 -10 58 6 17 30 20.6 11 107 86 -11 3 7 -10 53 6 -11 6 46 -10 49 27 0.01 - 83 0 0 -11 16 23 17 30 21.6 12 107 85 -11 21 23 -11 11 23 -11 25 2 -11 7 44 0.00 - 82 0 0 -11 34 25 17 30 22.8 13 107 84 -11 39 24 -11 29 25 -11 43 3 -11 25 46 0.00 - 81 0 0 -11 52 11 17 30 24.1 14 107 84 -11 57 11 -11 47 12 -12 0 49 -11 43 34 0.00 - 80 0 0 -12 9 43 17 30 25.4 15 106 83 -12 14 42 -12 4 44 -12 18 20 -12 1 6 0.00 - 79 0 0 -12 26 58 17 30 26.9 16 106 82 -12 31 57 -12 22 0 -12 35 35 -12 18 22 0.00 - 78 0 0 -12 43 58 17 30 28.4 17 106 81 -12 48 56 -12 39 0 -12 52 34 -12 35 22 0.00 - 77 0 0 -13 0 41 17 30 30.1 18 106 80 -13 5 39 -12 55 43 -13 9 17 -12 52 6 0.00 - 76 0 0 -13 17 8 17 30 31.8 19 106 79 -13 22 6 -13 12 11 -13 25 43 -13 8 34 0.00 - 75 0 0 -13 33 18 17 30 33.6 20 105 78 -13 38 16 -13 28 21 -13 41 53 -13 24 44 0.00 - 74 0 0 -13 49 11 17 30 35.5 21 105 77 -13 54 8 -13 44 14 -13 57 45 -13 40 38 0.00 - 73 0 0 -14 4 47 17 30 37.4 22 105 76 -14 9 44 -13 59 51 -14 13 20 -13 56 14 0.00 - 72 0 0 -14 20 5 17 30 39.5 23 105 75 -14 25 2 -14 15 9 -14 28 38 -14 11 33 0.00 - 71 0 0 -14 35 6 17 30 41.6 24 104 74 -14 40 2 -14 30 10 -14 43 37 -14 26 34 0.00 - 70 0 0 -14 49 48 17 30 43.8 25 104 73 -14 54 44 -14 44 53 -14 58 19 -14 41 17 0.00 - 69 0 0 -15 4 12 17 30 46.1 26 104 72 -15 9 8 -14 59 17 -15 12 43 -14 55 42 0.00 - 68 0 0 -15 18 18 17 30 48.5 27 104 71 -15 23 13 -15 13 23 -15 26 48 -15 9 48 0.00 - 67 0 0 -15 32 5 17 30 51.0 28 103 70 -15 37 0 -15 27 11 -15 40 35 -15 23 36 0.00 - 66 0 0 -15 45 34 17 30 53.5 29 103 69 -15 50 28 -15 40 40 -15 54 3 -15 37 5 0.00 - 65 0 0 -15 58 43 17 30 56.1 30 103 68 -16 3 37 -15 53 50 -16 7 12 -15 50 15 0.00 - 64 0 0 -16 11 34 17 30 58.8 31 103 67 -16 16 27 -16 6 40 -16 20 2 -16 3 6 0.00 - 63 0 0 -16 24 5 17 31 1.5 32 102 66 -16 28 58 -16 19 12 -16 32 32 -16 15 38 0.00 - 62 0 0 -16 36 17 17 31 4.3 33 102 65 -16 41 10 -16 31 24 -16 44 43 -16 27 50 0.00 - 61 0 0 -16 48 9 17 31 7.2 34 102 64 -16 53 2 -16 43 16 -16 56 35 -16 39 43 0.00 - 60 0 0 -16 59 41 17 31 10.2 35 101 63 -17 4 34 -16 54 49 -17 8 7 -16 51 16 -0.01 - 59 0 0 -17 10 54 17 31 13.2 36 101 62 -17 15 46 -17 6 2 -17 19 19 -17 2 29 -0.01 - 58 0 0 -17 21 47 17 31 16.3 37 101 61 -17 26 38 -17 16 55 -17 30 11 -17 13 22 -0.01 - 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9 59 13 -0.01 32 0 0 - 9 48 29 17 38 12.9 54 251 -28 - 9 53 31 - 9 43 27 - 9 57 11 - 9 39 46 -0.01 33 0 0 - 9 28 49 17 38 17.3 53 251 -29 - 9 33 51 - 9 23 46 - 9 37 32 - 9 20 6 0.00 34 0 0 - 9 8 55 17 38 21.7 52 251 -30 - 9 13 58 - 9 3 53 - 9 17 39 - 9 0 12 0.00 35 0 0 - 8 48 49 17 38 26.1 51 251 -31 - 8 53 52 - 8 43 46 - 8 57 33 - 8 40 5 0.00 36 0 0 - 8 28 30 17 38 30.4 50 251 -32 - 8 33 34 - 8 23 27 - 8 37 15 - 8 19 46 0.00 37 0 0 - 8 7 59 17 38 34.6 49 251 -33 - 8 13 3 - 8 2 56 - 8 16 44 - 7 59 15 0.00 38 0 0 - 7 47 17 17 38 38.8 48 250 -34 - 7 52 21 - 7 42 13 - 7 56 2 - 7 38 31 0.00 39 0 0 - 7 26 23 17 38 42.9 47 250 -35 - 7 31 27 - 7 21 19 - 7 35 9 - 7 17 37 0.00 40 0 0 - 7 5 18 17 38 46.9 46 250 -36 - 7 10 23 - 7 0 14 - 7 14 5 - 6 56 32 0.00 41 0 0 - 6 44 3 17 38 50.9 44 250 -37 - 6 49 8 - 6 38 59 - 6 52 50 - 6 35 17 0.00 42 0 0 - 6 22 38 17 38 54.8 43 250 -38 - 6 27 43 - 6 17 34 - 6 31 25 - 6 13 51 0.00 43 0 0 - 6 1 4 17 38 58.6 42 250 -39 - 6 6 9 - 5 55 59 - 6 9 52 - 5 52 17 0.00 44 0 0 - 5 39 21 17 39 2.4 41 250 -40 - 5 44 26 - 5 34 16 - 5 48 9 - 5 30 33 0.00 45 0 0 - 5 17 30 17 39 6.1 40 250 -42 - 5 22 35 - 5 12 24 - 5 26 18 - 5 8 41 0.00 46 0 0 - 4 55 30 17 39 9.7 39 250 -43 - 5 0 36 - 4 50 25 - 5 4 19 - 4 46 42 0.00 47 0 0 - 4 33 23 17 39 13.2 38 250 -44 - 4 38 29 - 4 28 18 - 4 42 12 - 4 24 35 0.00 48 0 0 - 4 11 10 17 39 16.6 37 250 -45 - 4 16 16 - 4 6 4 - 4 19 59 - 4 2 21 0.00 49 0 0 - 3 48 50 17 39 20.0 36 249 -46 - 3 53 56 - 3 43 44 - 3 57 39 - 3 40 0 0.00 50 0 0 - 3 26 24 17 39 23.3 35 249 -47 - 3 31 30 - 3 21 18 - 3 35 14 - 3 17 34 0.00 51 0 0 - 3 3 53 17 39 26.5 34 249 -48 - 3 8 59 - 2 58 47 - 3 12 43 - 2 55 3 0.00 52 0 0 - 2 41 17 17 39 29.6 33 249 -49 - 2 46 24 - 2 36 11 - 2 50 7 - 2 32 27 0.00 53 0 0 - 2 18 38 17 39 32.6 32 249 -50 - 2 23 44 - 2 13 31 - 2 27 28 - 2 9 47 0.00 54 0 0 - 1 55 54 17 39 35.5 30 249 -51 - 2 1 1 - 1 50 47 - 2 4 44 - 1 47 4 0.00 55 0 0 - 1 33 7 17 39 38.4 29 249 -52 - 1 38 14 - 1 28 1 - 1 41 58 - 1 24 17 0.00 56 0 0 - 1 10 18 17 39 41.1 28 249 -53 - 1 15 25 - 1 5 12 - 1 19 9 - 1 1 28 0.00 57 0 0 - 0 47 27 17 39 43.7 27 249 -54 - 0 52 34 - 0 42 20 - 0 56 18 - 0 38 37 0.00 58 0 0 - 0 24 35 17 39 46.3 26 249 -55 - 0 29 42 - 0 19 28 - 0 33 26 - 0 15 44 0.00 59 0 0 - 0 1 42 17 39 48.7 25 249 -57 - 0 6 48 0 3 25 - 0 10 32 0 7 9 0.00 60 0 0 0 21 12 17 39 51.1 24 249 -58 0 16 5 0 26 19 0 12 21 0 30 3 0.00 61 0 0 0 44 5 17 39 53.3 23 249 -59 0 38 59 0 49 12 0 35 15 0 52 56 0.00 62 0 0 1 6 58 17 39 55.5 22 249 -60 1 1 51 1 12 5 0 58 7 1 15 49 0.00 63 0 0 1 29 49 17 39 57.6 21 249 -61 1 24 42 1 34 56 1 20 59 1 38 40 0.00 64 0 0 1 52 38 17 39 59.5 20 249 -62 1 47 32 1 57 45 1 43 48 2 1 29 0.00 65 0 0 2 15 25 17 40 1.4 19 249 -63 2 10 19 2 20 32 2 6 35 2 24 16 0.00 66 0 0 2 38 9 17 40 3.1 18 249 -64 2 33 3 2 43 16 2 29 19 2 46 59 0.00 67 0 0 3 0 49 17 40 4.8 16 249 -65 2 55 43 3 5 56 2 51 59 3 9 40 0.00 68 0 0 3 23 26 17 40 6.3 15 249 -66 3 18 19 3 28 32 3 14 36 3 32 16 0.01 69 0 0 3 45 57 17 40 7.8 14 249 -67 3 40 51 3 51 4 3 37 8 3 54 47 0.01 70 0 0 4 8 24 17 40 9.1 13 250 -68 4 3 18 4 13 30 3 59 34 4 17 13 0.01 71 0 0 4 30 45 17 40 10.3 12 250 -69 4 25 39 4 35 51 4 21 56 4 39 34 0.01 72 0 0 4 53 0 17 40 11.5 11 250 -70 4 47 54 4 58 5 4 44 11 5 1 49 0.01 73 0 0 5 15 8 17 40 12.5 10 250 -71 5 10 2 5 20 13 5 6 19 5 23 56 0.01 74 0 0 5 37 9 17 40 13.4 9 250 -72 5 32 3 5 42 14 5 28 20 5 45 57 0.01 75 0 0 5 59 2 17 40 14.3 8 250 -73 5 53 57 6 4 8 5 50 14 6 7 50 0.01 76 0 0 6 20 48 17 40 15.0 7 250 -75 6 15 42 6 25 53 6 12 0 6 29 35 0.01 77 0 0 6 42 24 17 40 15.6 6 250 -76 6 37 20 6 47 29 6 33 37 6 51 12 0.02 78 0 0 7 3 52 17 40 16.1 5 250 -77 6 58 48 7 8 57 6 55 5 7 12 39 0.02 79 0 0 7 25 11 17 40 16.5 4 250 -78 7 20 6 7 30 15 7 16 24 7 33 57 0.03 80 0 0 7 46 19 17 40 16.8 3 251 -79 7 41 15 7 51 23 7 37 33 7 55 5 0.04 81 0 0 8 7 17 17 40 17.0 2 251 -80 8 2 13 8 12 21 7 58 32 8 16 3 0.07 82 0 0 8 28 5 17 40 17.1 1 251 -81 8 23 1 8 33 8 8 19 19 8 36 50 0.20 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 356-164713 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 47 56.7184 DE: -18 50 15.569 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 47 56.7184 DE: -18 50 15.569 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.8 * B mag [mag]: 12.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7037) Davidlean asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.008 distance from Earth [AU]: 3.03650 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 date of fit: 2023 Apr 25 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): 0.017", 0.001", 72.999° remarks: * orbital elements for (7037)Davidlean : Mean anomaly = 76.0359096820 deg Arg. of pericenter = 293.5146571091 deg Long. of node = 278.8057886133 deg Inclination = 11.0897155030 deg Eccentricity = 0.1075915752 Semimajor axis = 3.1044550628 AU Perihelion dist = 2.7704418523 AU Mag: H = 12.08, G = 0.15 Epoch of elements : MJD 60595.73282367 TDT (2024 Oct 12.7328) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr25,0.83,2024,10,12,17.587775,-0.001864,0.010157,11.825225,1.765974,0.005736,0.000556,0.000000,0.000000 -3.2522,-18.8109,-87.24,-7.78,False UCAC4 356-164713,18.79908848,-18.8376579,12.66,11.79,11.32,0.1,0,,18.82321869,-18.8108882,6.09,6.11,0,0,0 7037,Davidlean,17.87,17.628,3.0365,0,0,2.412,5.11,,1.2,0 0,75.9039,2024,10,12,293.5147,278.8058,11.0897,0.10759,3.10446,2.77044,12.07,5.0,0.15 1.365,0.0173,0.0014,73,0.0029,Known errors,1.12,0,-1,-1 20241012_164713,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org