IOTA/IOTA-ES occultation update for (920) Rogeria / UCAC4 375-073594 event on 2024 Jan 11, 19:55 UT Visible from Summary ------- On 2024 Jan 11 UT, the 26.5077247275379 km diameter asteroid (920) Rogeria will occult a 11.0 mag star in the constellation Libra 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 16.86 mag (the magnitude of the asteroid) for at most 0.770 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 Jan 11, 19:53 - 2024 Jan 11, 19:58 * geocentric midpoint of event [JD]: 2460321.33050229 * magnitude of target star: 11.03 * magnitude drop [mag]: 5.84 * estimated maximum duration [s]: 0.770 * Moon: 0 % sunlit, 57° distance * Sun: 53° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.002", 93°) * approx speed of asteroid's shadow [km/s]: 34.7319 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 375-073594 by 920 Rogeria on 2024 Jan 11 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 90 0 0 -29 22 44 19 53 24.8 1 107 -33 -29 32 2 -29 13 27 -29 35 37 -29 9 54 .... 91 0 0 -29 39 22 19 53 24.9 2 106 -32 -29 48 41 -29 30 5 -29 52 16 -29 26 31 0.59 92 0 0 -29 56 7 19 53 25.0 3 106 -32 -30 5 26 -29 46 49 -30 9 1 -29 43 15 0.63 93 0 0 -30 12 57 19 53 25.2 4 105 -31 -30 22 16 -30 3 39 -30 25 52 -30 0 5 0.65 94 0 0 -30 29 53 19 53 25.5 4 105 -30 -30 39 13 -30 20 34 -30 42 48 -30 17 0 0.66 95 0 0 -30 46 54 19 53 25.8 5 104 -30 -30 56 14 -30 37 35 -30 59 49 -30 34 0 0.67 96 0 0 -31 3 59 19 53 26.1 6 104 -29 -31 13 19 -30 54 40 -31 16 55 -30 51 5 0.67 97 0 0 -31 21 8 19 53 26.6 7 103 -28 -31 30 29 -31 11 49 -31 34 5 -31 8 14 0.68 98 0 0 -31 38 22 19 53 27.0 8 103 -27 -31 47 43 -31 29 2 -31 51 19 -31 25 27 0.68 99 0 0 -31 55 38 19 53 27.6 9 102 -27 -32 5 0 -31 46 18 -32 8 36 -31 42 43 0.68 100 0 0 -32 12 58 19 53 28.1 10 102 -26 -32 22 20 -32 3 37 -32 25 56 -32 0 2 0.68 101 0 0 -32 30 20 19 53 28.8 11 101 -25 -32 39 43 -32 20 59 -32 43 19 -32 17 24 0.69 102 0 0 -32 47 45 19 53 29.4 12 101 -24 -32 57 7 -32 38 23 -33 0 44 -32 34 48 0.69 103 0 0 -33 5 11 19 53 30.2 13 100 -24 -33 14 33 -32 55 49 -33 18 10 -32 52 14 0.69 104 0 0 -33 22 38 19 53 31.0 13 99 -23 -33 32 1 -33 13 16 -33 35 38 -33 9 41 0.69 105 0 0 -33 40 6 19 53 31.8 14 99 -22 -33 49 29 -33 30 44 -33 53 6 -33 27 8 0.69 106 0 0 -33 57 35 19 53 32.7 15 98 -21 -34 6 58 -33 48 13 -34 10 35 -33 44 37 0.69 107 0 0 -34 15 3 19 53 33.6 16 98 -21 -34 24 27 -34 5 41 -34 28 4 -34 2 5 0.69 108 0 0 -34 32 32 19 53 34.6 17 97 -20 -34 41 56 -34 23 9 -34 45 32 -34 19 33 0.69 109 0 0 -34 49 59 19 53 35.6 18 96 -19 -34 59 23 -34 40 37 -35 3 0 -34 37 1 0.69 110 0 0 -35 7 26 19 53 36.7 19 96 -18 -35 16 50 -34 58 3 -35 20 27 -34 54 27 0.69 111 0 0 -35 24 50 19 53 37.8 19 95 -17 -35 34 14 -35 15 27 -35 37 52 -35 11 51 0.69 112 0 0 -35 42 13 19 53 38.9 20 94 -17 -35 51 37 -35 32 50 -35 55 14 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26 0.73 - 89 0 0 -42 51 6 19 58 18.8 14 262 58 -43 0 24 -42 41 49 -43 3 59 -42 38 16 0.73 - 88 0 0 -42 36 46 19 58 19.5 13 262 58 -42 46 4 -42 27 29 -42 49 39 -42 23 55 0.73 - 87 0 0 -42 22 15 19 58 20.2 13 261 57 -42 31 34 -42 12 58 -42 35 9 -42 9 24 0.73 - 86 0 0 -42 7 35 19 58 20.8 12 260 57 -42 16 54 -41 58 17 -42 20 30 -41 54 43 0.74 - 85 0 0 -41 52 45 19 58 21.4 11 260 56 -42 2 5 -41 43 26 -42 5 40 -41 39 52 0.74 - 84 0 0 -41 37 46 19 58 22.0 10 259 55 -41 47 6 -41 28 27 -41 50 41 -41 24 52 0.74 - 83 0 0 -41 22 37 19 58 22.5 9 258 55 -41 31 57 -41 13 17 -41 35 33 -41 9 43 0.75 - 82 0 0 -41 7 19 19 58 23.0 9 258 54 -41 16 40 -40 58 0 -41 20 16 -40 54 25 0.75 - 81 0 0 -40 51 53 19 58 23.5 8 257 54 -41 1 14 -40 42 33 -41 4 50 -40 38 58 0.75 - 80 0 0 -40 36 18 19 58 23.9 7 256 53 -40 45 40 -40 26 58 -40 49 16 -40 23 23 0.76 - 79 0 0 -40 20 35 19 58 24.3 6 256 52 -40 29 57 -40 11 15 -40 33 33 -40 7 39 0.77 - 78 0 0 -40 4 45 19 58 24.6 5 255 52 -40 14 7 -39 55 23 -40 17 43 -39 51 48 0.78 - 77 0 0 -39 48 46 19 58 24.9 5 254 51 -39 58 8 -39 39 25 -40 1 45 -39 35 49 0.79 - 76 0 0 -39 32 40 19 58 25.1 4 254 50 -39 42 3 -39 23 19 -39 45 40 -39 19 43 0.81 - 75 0 0 -39 16 28 19 58 25.3 3 253 50 -39 25 50 -39 7 6 -39 29 27 -39 3 30 0.84 - 74 0 0 -39 0 8 19 58 25.5 2 252 49 -39 9 31 -38 50 46 -39 13 8 -38 47 10 0.90 - 73 0 0 -38 43 42 19 58 25.6 1 252 48 -38 53 5 -38 34 20 -38 56 42 -38 30 44 1.02 - 72 0 0 -38 27 10 19 58 25.6 1 251 48 -38 36 33 -38 17 48 -38 40 10 -38 14 12 1.52 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 375-073594 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 46 05.9994 DE: -15 02 09.067 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 46 05.9994 DE: -15 02 09.067 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.0 * B mag [mag]: 12.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (920) Rogeria asteroid class: approx. diameter [km]: 27 approx. diameter ["]: 0.011 distance from Earth [AU]: 3.20260 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.008", 0.002", 92.562° remarks: * orbital elements for (920)Rogeria : Mean anomaly = 107.3869390611 deg Arg. of pericenter = 270.3910693704 deg Long. of node = 192.6155733101 deg Inclination = 11.5944525256 deg Eccentricity = 0.1049607878 Semimajor axis = 2.6224713919 AU Perihelion dist = 2.3472147287 AU Mag: H = 11.26, G = 0.15 Epoch of elements : MJD 60320.83050234 TDT (2024 Jan 11.8305) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.77,2024,1,11,19.932055,-0.046998,-0.569767,19.535035,-1.638706,-0.004597,0.001335,-0.000001,0.000000 -172.9496,-15.1105,-117.01,-21.79,False UCAC4 375-073594,15.76833313,-15.0358517,12.24,11.03,10.38,0.1,4,K,15.79051311,-15.1104984,5.84,6.04,0,0,1 920,Rogeria,16.86,26.740,3.2026,0,0,3.705,-4.50,,1.4,0 0,107.1942,2024,1,11,270.3911,192.6156,11.5945,0.10496,2.62247,2.34721,11.26,5.0,0.15 1.192,0.0077,0.0022,93,0.0022,Known errors,1.43,0,-1,-1 20240111_073594,60137.01 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org