IOTA/IOTA-ES occultation update for (3024) Hainan / UCAC4 265-185214 event on 2024 Oct 18, 15:36 UT Visible from Summary ------- On 2024 Oct 18 UT, the 37.3839905250865 km diameter asteroid (3024) Hainan will occult a 11.5 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 5.47 mag to 16.91 mag (the magnitude of the asteroid) for at most 1.730 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 Oct 18, 15:31 - 2024 Oct 18, 15:41 * geocentric midpoint of event [JD]: 2460602.15023513 * magnitude of target star: 11.45 * magnitude drop [mag]: 5.47 * estimated maximum duration [s]: 1.730 * Moon: 98 % sunlit, 116° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 39 * 1 sigma uncertainty interval [path widths]: +/- 0.47 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.002", 86°) * approx speed of asteroid's shadow [km/s]: 21.8318 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 265-185214 by 3024 Hainan on 2024 Oct 18 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 - 69 0 0 -12 18 10 15 31 33.5 0 128 78 -12 31 23 -12 4 57 -12 43 53 .. .. .. .... - 68 0 0 -13 3 41 15 31 33.5 1 128 78 -13 16 49 -12 50 32 -13 29 15 -12 38 5 0.02 - 67 0 0 -13 48 19 15 31 33.8 3 127 79 -14 1 23 -13 35 15 -14 13 44 -13 22 52 -0.08 - 66 0 0 -14 32 5 15 31 34.1 4 127 80 -14 45 3 -14 19 6 -14 57 20 -14 6 47 -0.11 - 65 0 0 -15 14 57 15 31 34.6 5 127 80 -15 27 51 -15 2 3 -15 40 3 -14 49 49 -0.13 - 64 0 0 -15 56 55 15 31 35.2 6 127 81 -16 9 44 -15 44 6 -16 21 52 -15 31 57 -0.14 - 63 0 0 -16 38 0 15 31 36.0 7 126 81 -16 50 44 -16 25 15 -17 2 47 -16 13 10 -0.15 - 62 0 0 -17 18 10 15 31 36.8 9 126 81 -17 30 50 -17 5 30 -17 42 48 -16 53 30 -0.15 - 61 0 0 -17 57 26 15 31 37.8 10 126 81 -18 10 1 -17 44 51 -18 21 55 -17 32 55 -0.16 - 60 0 0 -18 35 48 15 31 38.9 11 126 81 -18 48 18 -18 23 17 -19 0 8 -18 11 26 -0.16 - 59 0 0 -19 13 15 15 31 40.0 12 125 80 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-0.18 62 0 0 - 0 40 29 15 39 49.6 42 217 -30 - 0 54 52 - 0 26 4 - 1 8 29 - 0 12 25 -0.18 63 0 0 0 17 10 15 39 54.4 41 217 -31 0 2 42 0 31 38 - 0 10 58 0 45 21 -0.18 64 0 0 1 15 19 15 39 59.1 39 217 -32 1 0 48 1 29 50 0 47 4 1 43 37 -0.18 65 0 0 2 13 56 15 40 3.7 38 218 -34 1 59 21 2 28 31 1 45 35 2 42 20 -0.18 66 0 0 3 12 58 15 40 8.1 37 218 -35 2 58 20 3 27 36 2 44 30 3 41 29 -0.18 67 0 0 4 12 22 15 40 12.4 35 218 -36 3 57 41 4 27 3 3 43 49 4 40 58 -0.18 68 0 0 5 12 4 15 40 16.6 34 218 -37 4 57 21 5 26 48 4 43 26 5 40 46 -0.18 69 0 0 6 12 2 15 40 20.6 32 218 -38 5 57 17 6 26 49 5 43 20 6 40 49 -0.18 70 0 0 7 12 13 15 40 24.4 31 219 -39 6 57 25 7 27 1 6 43 26 7 41 3 -0.18 71 0 0 8 12 32 15 40 28.1 29 219 -40 7 57 42 8 27 22 7 43 41 8 41 26 -0.18 72 0 0 9 12 56 15 40 31.7 28 219 -42 8 58 5 9 27 48 8 44 2 9 41 53 -0.18 73 0 0 10 13 22 15 40 35.0 27 219 -43 9 58 29 10 28 15 9 44 25 10 42 22 -0.18 74 0 0 11 13 46 15 40 38.2 25 220 -44 10 58 53 11 28 41 10 44 48 11 42 48 -0.18 75 0 0 12 14 5 15 40 41.3 24 220 -45 11 59 11 12 29 0 11 45 5 12 43 9 -0.18 76 0 0 13 14 16 15 40 44.1 22 220 -46 12 59 21 13 29 12 12 45 15 13 43 20 -0.18 77 0 0 14 14 15 15 40 46.8 21 220 -47 13 59 20 14 29 10 13 45 13 14 43 19 -0.18 78 0 0 15 13 58 15 40 49.3 20 221 -48 14 59 3 15 28 54 14 44 57 15 43 2 -0.18 79 0 0 16 13 23 15 40 51.7 18 221 -49 15 58 28 16 28 18 15 44 23 16 42 26 -0.18 80 0 0 17 12 25 15 40 53.8 17 221 -50 16 57 32 17 27 20 16 43 27 17 41 28 -0.18 81 0 0 18 11 3 15 40 55.8 16 222 -50 17 56 11 18 25 57 17 42 7 18 40 4 -0.18 82 0 0 19 9 13 15 40 57.6 14 222 -51 18 54 22 19 24 6 18 40 19 19 38 11 -0.18 83 0 0 20 6 53 15 40 59.2 13 222 -52 19 52 3 20 21 43 19 38 2 20 35 48 -0.18 84 0 0 21 3 59 15 41 0.7 12 223 -53 20 49 11 21 18 48 20 35 11 21 32 50 -0.18 85 0 0 22 0 29 15 41 2.0 10 223 -53 21 45 43 22 15 15 21 31 45 22 29 16 -0.17 86 0 0 22 56 20 15 41 3.1 9 223 -54 22 41 36 23 11 5 22 27 41 23 25 3 -0.17 87 0 0 23 51 31 15 41 4.1 8 224 -55 23 36 50 24 6 13 23 22 56 24 20 9 -0.17 88 0 0 24 45 59 15 41 4.9 6 224 -55 24 31 20 25 0 38 24 17 30 25 14 31 -0.17 89 0 0 25 39 42 15 41 5.5 5 225 -56 25 25 6 25 54 18 25 11 18 26 8 8 -0.17 90 0 0 26 32 38 15 41 6.0 4 225 -56 26 18 6 26 47 11 26 4 21 27 0 58 -0.16 91 0 0 27 24 46 15 41 6.3 3 226 -57 27 10 17 27 39 16 26 56 36 27 53 0 -0.15 92 0 0 28 16 4 15 41 6.5 1 226 -57 28 1 39 28 30 30 27 48 1 28 44 11 -0.12 93 0 0 29 6 32 15 41 6.6 0 227 -58 28 52 10 .. .. .. 28 38 36 .. .. .. 0.60 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 265-185214 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 21 02.4323 DE: -37 01 52.659 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 21 02.4320 DE: -37 01 52.660 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.5 * B mag [mag]: 12.9 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3024) Hainan asteroid class: approx. diameter [km]: 37 approx. diameter ["]: 0.016 distance from Earth [AU]: 3.16440 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.020", 0.002", 86.196° remarks: * orbital elements for (3024)Hainan : Mean anomaly = 308.5570374584 deg Arg. of pericenter = 342.0877466873 deg Long. of node = 27.3653989369 deg Inclination = 14.8450174539 deg Eccentricity = 0.1310155391 Semimajor axis = 3.4121027537 AU Perihelion dist = 2.9650642720 AU Mag: H = 10.97, G = 0.15 Epoch of elements : MJD 60601.65023471 TDT (2024 Oct 18.6502) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,1.73,2024,10,18,15.605643,-0.084558,0.172406,11.045942,5.461747,0.005752,0.000614,0.000000,0.000000 28.9733,-36.9872,-57.83,-9.95,False UCAC4 265-185214,19.35067567,-37.0312942,12.94,11.45,10.65,0.2,0,,19.37827276,-36.9871507,5.46,5.82,0,0,0 3024,Hainan,16.91,37.843,3.1644,0,0,2.562,15.18,,2.2,0 0,308.4554,2024,10,18,342.0877,27.3654,14.8450,0.13102,3.41210,2.96506,10.96,5.0,0.15 1.473,0.0197,0.0022,86,0.0078,Known errors,1.06,0,-1,-1 20241018_185214,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org