IOTA/IOTA-ES occultation update for (368) Haidea / UCAC4 548-025211 event on 2024 Sep 17, 00:04 UT Visible from Summary ------- On 2024 Sep 17 UT, the 69.351 km diameter asteroid (368) Haidea will occult a 11.8 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.24 mag to 16.02 mag (the magnitude of the asteroid) for at most 3.620 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: 100 * date and approx. time of event: 2024 Sep 16, 23:59 - 2024 Sep 17, 00:09 * geocentric midpoint of event [JD]: 2460570.50315880 * magnitude of target star: 11.80 * magnitude drop [mag]: 4.24 * estimated maximum duration [s]: 3.620 * Moon: 98 % sunlit, 116° distance * Sun: 80° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 84 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.003", 100°) * approx speed of asteroid's shadow [km/s]: 19.1728 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 548-025211 by 368 Haidea on 2024 Sep 17 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 17 0 0 -20 33 24 23 59 59.5 - 1 69 -64 -20 57 48 -20 9 8 -21 2 42 -20 4 18 .... 18 0 0 -20 12 17 23 59 59.7 - 2 69 -64 -20 36 38 -19 48 4 -20 41 31 -19 43 14 0.39 19 0 0 -19 51 30 23 59 59.9 - 3 68 -63 -20 15 47 -19 27 20 -20 20 40 -19 22 31 0.50 20 0 0 -19 31 3 0 0 0.3 4 68 -63 -19 55 18 -19 6 56 -20 0 9 -19 2 8 0.55 21 0 0 -19 10 58 0 0 0.8 5 68 -62 -19 35 9 -18 46 54 -19 40 0 -18 42 6 0.58 22 0 0 -18 51 14 0 0 1.5 6 67 -62 -19 15 22 -18 27 13 -19 20 13 -18 22 26 0.60 23 0 0 -18 31 52 0 0 2.2 7 67 -61 -18 55 57 -18 7 54 -19 0 47 -18 3 7 0.61 24 0 0 -18 12 52 0 0 3.1 8 67 -60 -18 36 55 -17 48 57 -18 41 44 -17 44 11 0.62 25 0 0 -17 54 16 0 0 4.1 9 66 -60 -18 18 15 -17 30 24 -18 23 4 -17 25 38 0.63 26 0 0 -17 36 2 0 0 5.2 10 66 -59 -17 59 59 -17 12 13 -18 4 47 -17 7 28 0.63 27 0 0 -17 18 13 0 0 6.5 11 66 -58 -17 42 6 -16 54 26 -17 46 54 -16 49 42 0.64 28 0 0 -17 0 47 0 0 7.8 12 65 -58 -17 24 38 -16 37 4 -17 29 25 -16 32 20 0.64 29 0 0 -16 43 46 0 0 9.3 13 65 -57 -17 7 34 -16 20 5 -17 12 20 -16 15 22 0.65 30 0 0 -16 27 10 0 0 10.9 14 65 -56 -16 50 55 -16 3 32 -16 55 41 -15 58 49 0.65 31 0 0 -16 10 59 0 0 12.7 15 64 -55 -16 34 41 -15 47 23 -16 39 27 -15 42 41 0.65 32 0 0 -15 55 13 0 0 14.5 16 64 -54 -16 18 53 -15 31 40 -16 23 38 -15 26 59 0.66 33 0 0 -15 39 53 0 0 16.5 17 64 -53 -16 3 31 -15 16 23 -16 8 15 -15 11 42 0.66 34 0 0 -15 25 0 0 0 18.5 18 63 -53 -15 48 35 -15 1 32 -15 53 18 -14 56 51 0.66 35 0 0 -15 10 33 0 0 20.7 19 63 -52 -15 34 5 -14 47 7 -15 38 48 -14 42 27 0.66 36 0 0 -14 56 32 0 0 23.0 20 63 -51 -15 20 2 -14 33 9 -15 24 45 -14 28 29 0.66 37 0 0 -14 42 59 0 0 25.4 20 62 -50 -15 6 26 -14 19 38 -15 11 8 -14 14 58 0.67 38 0 0 -14 29 52 0 0 28.0 21 62 -49 -14 53 18 -14 6 34 -14 57 59 -14 1 55 0.67 39 0 0 -14 17 14 0 0 30.6 22 62 -48 -14 40 37 -13 53 57 -14 45 18 -13 49 19 0.67 40 0 0 -14 5 2 0 0 33.4 23 61 -47 -14 28 24 -13 41 48 -14 33 4 -13 37 10 0.67 41 0 0 -13 53 19 0 0 36.2 24 61 -46 -14 16 38 -13 30 7 -14 21 19 -13 25 29 0.67 42 0 0 -13 42 4 0 0 39.2 25 60 -45 -14 5 21 -13 18 54 -14 10 2 -13 14 17 0.67 43 0 0 -13 31 18 0 0 42.2 26 60 -45 -13 54 33 -13 8 9 -13 59 13 -13 3 32 0.67 44 0 0 -13 21 0 0 0 45.4 27 60 -44 -13 44 13 -12 57 53 -13 48 53 -12 53 17 0.67 45 0 0 -13 11 11 0 0 48.7 28 59 -43 -13 34 22 -12 48 5 -13 39 1 -12 43 29 0.67 46 0 0 -13 1 50 0 0 52.1 29 59 -42 -13 25 0 -12 38 47 -13 29 39 -12 34 11 0.68 47 0 0 -12 52 59 0 0 55.5 30 58 -41 -13 16 8 -12 29 57 -13 20 46 -12 25 22 0.68 48 0 0 -12 44 37 0 0 59.1 31 58 -40 -13 7 44 -12 21 37 -13 12 22 -12 17 1 0.68 49 0 0 -12 36 45 0 1 2.8 32 57 -39 -12 59 50 -12 13 45 -13 4 28 -12 9 10 0.68 50 0 0 -12 29 22 0 1 6.5 33 57 -38 -12 52 26 -12 6 24 -12 57 3 -12 1 49 0.68 51 0 0 -12 22 28 0 1 10.4 34 56 -37 -12 45 31 -11 59 32 -12 50 9 -11 54 57 0.68 52 0 0 -12 16 5 0 1 14.3 34 56 -36 -12 39 7 -11 53 9 -12 43 44 -11 48 35 0.68 53 0 0 -12 10 11 0 1 18.3 35 55 -35 -12 33 12 -11 47 17 -12 37 49 -11 42 43 0.68 54 0 0 -12 4 48 0 1 22.4 36 55 -34 -12 27 48 -11 41 54 -12 32 25 -11 37 20 0.68 55 0 0 -11 59 54 0 1 26.6 37 54 -33 -12 22 54 -11 37 2 -12 27 30 -11 32 28 0.68 56 0 0 -11 55 31 0 1 30.9 38 54 -32 -12 18 30 -11 32 39 -12 23 6 -11 28 6 0.68 57 0 0 -11 51 38 0 1 35.3 39 53 -31 -12 14 36 -11 28 47 -12 19 12 -11 24 13 0.68 58 0 0 -11 48 16 0 1 39.7 40 52 -30 -12 11 13 -11 25 25 -12 15 49 -11 20 52 0.68 59 0 0 -11 45 24 0 1 44.3 40 52 -29 -12 8 21 -11 22 33 -12 12 57 -11 18 0 0.68 60 0 0 -11 43 2 0 1 48.9 41 51 -28 -12 5 59 -11 20 12 -12 10 35 -11 15 39 0.68 61 0 0 -11 41 11 0 1 53.6 42 50 -27 -12 4 8 -11 18 22 -12 8 43 -11 13 48 0.68 62 0 0 -11 39 51 0 1 58.3 43 49 -26 -12 2 47 -11 17 2 -12 7 23 -11 12 28 0.69 63 0 0 -11 39 2 0 2 3.1 43 49 -25 -12 1 57 -11 16 12 -12 6 33 -11 11 39 0.69 64 0 0 -11 38 43 0 2 8.0 44 48 -24 -12 1 39 -11 15 53 -12 6 14 -11 11 20 0.69 65 0 0 -11 38 55 0 2 13.0 45 47 -23 -12 1 51 -11 16 5 -12 6 26 -11 11 32 0.69 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-43 23 46 0.90 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 548-025211 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 19 02.2496 DE: +19 26 20.296 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 19 02.2498 DE: +19 26 20.296 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (368) Haidea asteroid class: approx. diameter [km]: 69 approx. diameter ["]: 0.029 distance from Earth [AU]: 3.24770 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#114 date of fit: 2023 Feb 09 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): 0.014", 0.003", 100.423° remarks: * orbital elements for (368)Haidea : Mean anomaly = 92.3234340966 deg Arg. of pericenter = 95.7610546245 deg Long. of node = 226.2755684954 deg Inclination = 7.7970904924 deg Eccentricity = 0.2034535428 Semimajor axis = 3.0772642602 AU Perihelion dist = 2.4511839442 AU Mag: H = 10.00, G = 0.15 Epoch of elements : MJD 60570.00315875 TDT (2024 Sep 17.0032) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1142023Feb09,3.62,2024,9,17,0.075811,-0.125118,-0.554259,10.558141,-2.373539,-0.005656,0.000134,0.000000,0.000000 97.5622,19.4302,177.49,2.14,False UCAC4 548-025211,6.31729153,19.4389712,12.09,11.80,11.64,0.0,0,,6.34152775,19.4302328,4.24,3.96,0,0,0 368,Haidea,16.02,69.351,3.2477,0,0,2.021,-6.43,,3.4,0 0,92.1403,2024,9,16,95.7611,226.2756,7.7971,0.20345,3.07726,2.45118,9.99,5.0,0.15 1.100,0.0137,0.0029,100,0.0029,Known errors,1.00,0,-1,-1 20240917_025211,60140.57 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org