IOTA/IOTA-ES occultation update for (6475) Refugium / UCAC4 372-063292 event on 2024 Jan 08, 23:52 UT Visible from Summary ------- On 2024 Jan 08 UT, the 31.153 km diameter asteroid (6475) Refugium will occult a 11.8 mag star in the constellation Corvus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.84 mag to 17.68 mag (the magnitude of the asteroid) for at most 2.080 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 Jan 08, 23:45 - 2024 Jan 08, 23:59 * geocentric midpoint of event [JD]: 2460318.49486675 * magnitude of target star: 11.84 * magnitude drop [mag]: 5.84 * estimated maximum duration [s]: 2.080 * Moon: 8 % sunlit, 57° distance * Sun: 89° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.001", 112°) * approx speed of asteroid's shadow [km/s]: 14.9552 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 372-063292 by 6475 Refugium on 2024 Jan 8 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 6 0 0 20 56 16 23 45 52.2 1 107 -88 20 46 56 21 5 36 20 40 20 21 12 11 .... 7 0 0 20 38 15 23 45 52.3 1 108 -87 20 28 52 20 47 37 20 22 14 20 54 13 0.29 8 0 0 20 19 26 23 45 52.5 2 108 -86 20 10 1 20 28 50 20 3 22 20 35 28 0.31 9 0 0 19 59 49 23 45 52.9 3 108 -85 19 50 22 20 9 16 19 43 41 20 15 56 0.32 10 0 0 19 39 24 23 45 53.5 4 109 -85 19 29 54 19 48 54 19 23 12 19 55 35 0.33 11 0 0 19 18 11 23 45 54.2 5 109 -84 19 8 38 19 27 43 19 1 54 19 34 26 0.33 12 0 0 18 56 8 23 45 55.0 7 109 -83 18 46 33 19 5 43 18 39 47 19 12 28 0.33 13 0 0 18 33 16 23 45 56.0 8 110 -82 18 23 38 18 42 53 18 16 50 18 49 41 0.33 14 0 0 18 9 34 23 45 57.1 9 110 -81 17 59 52 18 19 14 17 53 2 18 26 3 0.34 15 0 0 17 45 0 23 45 58.4 10 110 -80 17 35 16 17 54 44 17 28 24 18 1 35 0.34 16 0 0 17 19 36 23 45 59.8 11 110 -79 17 9 49 17 29 22 17 2 54 17 36 16 0.34 17 0 0 16 53 20 23 46 1.4 12 111 -78 16 43 29 17 3 9 16 36 32 17 10 5 0.34 18 0 0 16 26 11 23 46 3.2 13 111 -76 16 16 18 16 36 4 16 9 18 16 43 2 0.34 19 0 0 15 58 10 23 46 5.1 14 111 -75 15 48 13 16 8 6 15 41 11 16 15 7 0.34 20 0 0 15 29 16 23 46 7.2 15 112 -74 15 19 15 15 39 15 15 12 11 15 46 18 0.34 21 0 0 14 59 27 23 46 9.5 16 112 -73 14 49 23 15 9 31 14 42 17 15 16 36 0.34 22 0 0 14 28 45 23 46 11.9 17 112 -72 14 18 37 14 38 52 14 11 28 14 46 0 0.34 23 0 0 13 57 8 23 46 14.6 18 112 -71 13 46 56 14 7 18 13 39 44 14 14 29 0.34 24 0 0 13 24 35 23 46 17.4 19 112 -70 13 14 20 13 34 50 13 7 6 13 42 3 0.34 25 0 0 12 51 8 23 46 20.4 20 113 -69 12 40 48 13 1 26 12 33 31 13 8 42 0.34 26 0 0 12 16 44 23 46 23.6 22 113 -68 12 6 21 12 27 6 11 59 1 12 34 25 0.34 27 0 0 11 41 24 23 46 27.0 23 113 -67 11 30 57 11 51 50 11 23 34 11 59 12 0.34 28 0 0 11 5 8 23 46 30.6 24 113 -65 10 54 36 11 15 38 10 47 10 11 23 3 0.34 29 0 0 10 27 54 23 46 34.4 25 113 -64 10 17 19 10 38 29 10 9 50 10 45 57 0.34 30 0 0 9 49 44 23 46 38.4 26 113 -63 9 39 4 10 0 23 9 31 32 10 7 54 0.34 31 0 0 9 10 37 23 46 42.6 27 113 -62 8 59 52 9 21 20 8 52 17 9 28 54 0.35 32 0 0 8 30 32 23 46 47.0 29 113 -61 8 19 43 8 41 20 8 12 5 8 48 57 0.35 33 0 0 7 49 30 23 46 51.7 30 113 -59 7 38 37 8 0 23 7 30 55 8 8 3 0.35 34 0 0 7 7 31 23 46 56.5 31 113 -58 6 56 33 7 18 29 6 48 48 7 26 12 0.35 35 0 0 6 24 35 23 47 1.6 32 113 -57 6 13 33 6 35 37 6 5 45 6 43 24 0.35 36 0 0 5 40 43 23 47 6.9 33 113 -56 5 29 35 5 51 49 5 21 44 5 59 39 0.35 37 0 0 4 55 53 23 47 12.4 35 113 -54 4 44 41 5 7 5 4 36 46 5 14 58 0.35 38 0 0 4 10 8 23 47 18.2 36 113 -53 3 58 51 4 21 24 3 50 53 4 29 20 0.35 39 0 0 3 23 27 23 47 24.2 37 113 -52 3 12 6 3 34 48 3 4 4 3 42 48 0.35 40 0 0 2 35 52 23 47 30.4 38 113 -51 2 24 25 2 47 17 2 16 20 2 55 20 0.35 41 0 0 1 47 22 23 47 36.8 40 112 -49 1 35 51 1 58 53 1 27 42 2 6 59 0.35 42 0 0 0 58 0 23 47 43.4 41 112 -48 0 46 23 1 9 35 0 38 12 1 17 45 0.35 43 0 0 0 7 45 23 47 50.3 42 112 -47 - 0 3 56 0 19 25 - 0 12 11 0 27 38 0.35 44 0 0 - 0 43 21 23 47 57.4 43 111 -45 - 0 55 6 - 0 31 36 - 1 3 25 - 0 23 19 0.34 45 0 0 - 1 35 16 23 48 4.7 45 111 -44 - 1 47 6 - 1 23 26 - 1 55 28 - 1 15 6 0.34 46 0 0 - 2 27 59 23 48 12.2 46 110 -43 - 2 39 54 - 2 16 5 - 2 48 19 - 2 7 41 0.34 47 0 0 - 3 21 28 23 48 20.0 47 110 -41 - 3 33 28 - 3 9 29 - 3 41 57 - 3 1 3 0.34 48 0 0 - 4 15 42 23 48 27.9 48 109 -40 - 4 27 46 - 4 3 38 - 4 36 18 - 3 55 8 0.34 49 0 0 - 5 10 38 23 48 36.1 50 109 -39 - 5 22 47 - 4 58 30 - 5 31 22 - 4 49 57 0.34 50 0 0 - 6 6 14 23 48 44.4 51 108 -37 - 6 18 27 - 5 54 2 - 6 27 6 - 5 45 26 0.34 51 0 0 - 7 2 28 23 48 53.0 52 107 -36 - 7 14 46 - 6 50 12 - 7 23 27 - 6 41 33 0.34 52 0 0 - 7 59 18 23 49 1.7 54 106 -34 - 8 11 40 - 7 46 57 - 8 20 24 - 7 38 15 0.34 53 0 0 - 8 56 40 23 49 10.6 55 105 -33 - 9 9 6 - 8 44 15 - 9 17 53 - 8 35 31 0.34 54 0 0 - 9 54 32 23 49 19.6 56 104 -32 -10 7 2 - 9 42 4 -10 15 52 - 9 33 16 0.34 55 0 0 -10 52 52 23 49 28.8 57 103 -30 -11 5 25 -10 40 19 -11 14 18 -10 31 29 0.34 56 0 0 -11 51 35 23 49 38.2 58 101 -29 -12 4 12 -11 38 59 -12 13 7 -11 30 6 0.34 57 0 0 -12 50 38 23 49 47.7 60 100 -28 -13 3 19 -12 37 59 -13 12 16 -12 29 5 0.34 58 0 0 -13 49 59 23 49 57.3 61 98 -26 -14 2 43 -13 37 17 -14 11 42 -13 28 20 0.34 59 0 0 -14 49 34 23 50 7.0 62 96 -25 -15 2 20 -14 36 49 -15 11 22 -14 27 50 0.34 60 0 0 -15 49 19 23 50 16.8 63 94 -23 -16 2 8 -15 36 31 -16 11 11 -15 27 30 0.34 61 0 0 -16 49 10 23 50 26.7 64 92 -22 -17 2 2 -16 36 20 -17 11 7 -16 27 18 0.34 62 0 0 -17 49 4 23 50 36.6 65 90 -21 -18 1 58 -17 36 12 -18 11 5 -17 27 8 0.34 63 0 0 -18 48 58 23 50 46.6 66 87 -19 -19 1 53 -18 36 4 -19 11 1 -18 26 58 0.34 64 0 0 -19 48 47 23 50 56.7 67 84 -18 -20 1 44 -19 35 51 -20 10 53 -19 26 45 0.34 65 0 0 -20 48 27 23 51 6.7 68 81 -17 -21 1 25 -20 35 30 -21 10 35 -20 26 23 0.34 66 0 0 -21 47 55 23 51 16.8 68 78 -15 -22 0 55 -21 34 58 -22 10 5 -21 25 49 0.34 67 0 0 -22 47 8 23 51 26.9 69 75 -14 -23 0 8 -22 34 9 -23 9 19 -22 25 1 0.34 68 0 0 -23 46 1 23 51 36.9 70 71 -13 -23 59 2 -23 33 2 -24 8 13 -23 23 53 0.34 69 0 0 -24 44 32 23 51 46.9 70 67 -11 -24 57 32 -24 31 33 -25 6 44 -24 22 24 0.34 70 0 0 -25 42 36 23 51 56.9 71 63 -10 -25 55 36 -25 29 37 -26 4 47 -25 20 28 0.34 71 0 0 -26 40 10 23 52 6.8 71 59 -9 -26 53 10 -26 27 12 -27 2 21 -26 18 3 0.33 72 0 0 -27 37 12 23 52 16.7 71 55 -7 -27 50 10 -27 24 14 -27 59 21 -27 15 6 0.33 73 0 0 -28 33 37 23 52 26.4 71 50 -6 -28 46 35 -28 20 41 -28 55 45 -28 11 34 0.33 74 0 0 -29 29 24 23 52 36.1 72 46 -5 -29 42 21 -29 16 29 -29 51 29 -29 7 23 0.33 75 0 0 -30 24 30 23 52 45.6 71 41 -4 -30 37 25 -30 11 37 -30 46 32 -30 2 32 0.33 76 0 0 -31 18 52 23 52 55.1 71 37 -2 -31 31 44 -31 6 0 -31 40 51 -30 56 57 0.33 77 0 0 -32 12 27 23 53 4.4 71 33 -1 -32 25 18 -31 59 38 -32 34 22 -31 50 36 0.33 78 0 0 -33 5 15 23 53 13.6 71 29 0 -33 18 3 -32 52 28 -33 27 5 -32 43 27 0.33 79 0 0 -33 57 12 23 53 22.6 70 25 1 -34 9 57 -33 44 27 -34 18 58 -33 35 29 0.33 80 0 0 -34 48 16 23 53 31.5 70 21 2 -35 0 59 -34 35 35 -35 9 58 -34 26 39 0.33 81 0 0 -35 38 28 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46 7 -44 5 47 0.33 94 0 0 -45 3 30 23 55 19.0 60 346 16 -45 15 16 -44 51 46 -45 23 34 -44 43 30 0.33 95 0 0 -45 40 7 23 55 25.4 59 344 17 -45 51 48 -45 28 28 -46 0 3 -45 20 15 0.33 96 0 0 -46 15 47 23 55 31.6 59 343 18 -46 27 23 -46 4 12 -46 35 35 -45 56 3 0.33 97 0 0 -46 50 30 23 55 37.7 58 341 19 -47 2 1 -46 39 0 -47 10 10 -46 30 54 0.33 98 0 0 -47 24 18 23 55 43.7 57 340 20 -47 35 44 -47 12 52 -47 43 49 -47 4 49 0.33 99 0 0 -47 57 10 23 55 49.5 56 338 20 -48 8 31 -47 45 49 -48 16 33 -47 37 49 0.33 100 0 0 -48 29 8 23 55 55.1 56 337 21 -48 40 24 -48 17 52 -48 48 23 -48 9 55 0.33 101 0 0 -49 0 12 23 56 0.6 55 335 22 -49 11 24 -48 49 1 -49 19 19 -48 41 7 0.33 102 0 0 -49 30 24 23 56 5.9 54 334 23 -49 41 31 -49 19 17 -49 49 22 -49 11 27 0.33 103 0 0 -49 59 43 23 56 11.1 53 333 23 -50 10 46 -49 48 41 -50 18 34 -49 40 55 0.33 104 0 0 -50 28 13 23 56 16.2 53 332 24 -50 39 11 -50 17 15 -50 46 56 -50 9 32 0.33 105 0 0 -50 55 52 23 56 21.1 52 330 25 -51 6 45 -50 44 59 -51 14 27 -50 37 19 0.33 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Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 372-063292 * constellation : Corvus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 12 53 37.2163 DE: -15 44 31.753 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 12 53 37.2165 DE: -15 44 31.754 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.8 * B mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6475) Refugium asteroid class: approx. diameter [km]: 31 approx. diameter ["]: 0.012 distance from Earth [AU]: 3.51190 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 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): 0.013", 0.001", 111.912° remarks: * orbital elements for (6475)Refugium : Mean anomaly = 193.8495858597 deg Arg. of pericenter = 75.3545595920 deg Long. of node = 277.1071568552 deg Inclination = 8.9247148499 deg Eccentricity = 0.1600796409 Semimajor axis = 3.1445734681 AU Perihelion dist = 2.6411912766 AU Mag: H = 11.30, G = 0.15 Epoch of elements : MJD 60317.99486679 TDT (2024 Jan 08.9949) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr25,2.08,2024,1,8,23.876802,-0.203198,-0.239720,6.451310,-5.443685,-0.005650,0.002392,0.000000,0.000000 87.5366,-15.8712,-176.48,-22.20,False UCAC4 372-063292,12.89367117,-15.7421534,12.11,11.84,11.69,0.0,0,,12.91466809,-15.8712224,5.84,5.54,0,0,0 6475,Refugium,17.68,31.153,3.5119,0,0,1.121,-13.64,,2.2,0 0,193.6737,2024,1,8,75.3546,277.1072,8.9247,0.16008,3.14457,2.64119,11.29,5.0,0.15 1.353,0.0133,0.0012,112,0.0043,Known errors,1.38,0,-1,-1 20240108_063292,60137.01 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org