IOTA/IOTA-ES occultation update for (13737) 1998 RU76 / TYC 742-00439-1 event on 2024 Nov 28, 08:35 UT Visible from Summary ------- On 2024 Nov 28 UT, the 9.527 km diameter asteroid (13737) 1998 RU76 will occult a 11.2 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 6.92 mag to 18.14 mag (the magnitude of the asteroid) for at most 0.870 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 Nov 28, 08:28 - 2024 Nov 28, 08:43 * geocentric midpoint of event [JD]: 2460642.85806600 * magnitude of target star: 11.22 * magnitude drop [mag]: 6.92 * estimated maximum duration [s]: 0.870 * Moon: 8 % sunlit, 120° distance * Sun: 152° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.48 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.004", 86°) * approx speed of asteroid's shadow [km/s]: 10.9172 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 742-00439-1 by 13737 1998 RU76 on 2024 Nov 28 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 -180 0 0 -42 19 16 8 42 48.3 1 69 -13 -42 15 32 -42 23 0 -42 11 59 -42 26 34 .... -179 0 0 -42 3 5 8 42 48.1 1 69 -14 -41 59 20 -42 6 49 -41 55 47 -42 10 23 0.57 -178 0 0 -41 46 52 8 42 47.7 2 68 -15 -41 43 8 -41 50 37 -41 39 35 -41 54 10 0.69 -177 0 0 -41 30 40 8 42 47.2 3 67 -16 -41 26 56 -41 34 24 -41 23 23 -41 37 58 0.75 -176 0 0 -41 14 28 8 42 46.6 4 67 -16 -41 10 44 -41 18 12 -41 7 11 -41 21 45 0.79 -175 0 0 -40 58 16 8 42 45.8 5 66 -17 -40 54 32 -41 2 0 -40 50 59 -41 5 33 0.81 -174 0 0 -40 42 5 8 42 44.8 5 66 -18 -40 38 21 -40 45 48 -40 34 48 -40 49 22 0.83 -173 0 0 -40 25 55 8 42 43.7 6 65 -18 -40 22 11 -40 29 39 -40 18 39 -40 33 12 0.84 -172 0 0 -40 9 47 8 42 42.4 7 64 -19 -40 6 3 -40 13 30 -40 2 31 -40 17 3 0.85 -171 0 0 -39 53 40 8 42 41.0 8 64 -20 -39 49 57 -39 57 24 -39 46 25 -40 0 57 0.86 -170 0 0 -39 37 36 8 42 39.4 9 63 -20 -39 33 53 -39 41 20 -39 30 21 -39 44 52 0.86 -169 0 0 -39 21 35 8 42 37.6 9 62 -21 -39 17 52 -39 25 18 -39 14 21 -39 28 51 0.87 -168 0 0 -39 5 37 8 42 35.7 10 62 -22 -39 1 54 -39 9 20 -38 58 23 -39 12 52 0.87 -167 0 0 -38 49 43 8 42 33.7 11 61 -22 -38 46 0 -38 53 25 -38 42 29 -38 56 58 0.88 -166 0 0 -38 33 52 8 42 31.4 12 60 -23 -38 30 10 -38 37 35 -38 26 39 -38 41 7 0.88 -165 0 0 -38 18 6 8 42 29.0 13 60 -24 -38 14 24 -38 21 48 -38 10 53 -38 25 20 0.88 -164 0 0 -38 2 24 8 42 26.5 13 59 -24 -37 58 42 -38 6 7 -37 55 12 -38 9 38 0.89 -163 0 0 -37 46 48 8 42 23.8 14 58 -25 -37 43 6 -37 50 30 -37 39 35 -37 54 1 0.89 -162 0 0 -37 31 17 8 42 20.9 15 58 -25 -37 27 35 -37 34 58 -37 24 5 -37 38 30 0.89 -161 0 0 -37 15 51 8 42 17.9 16 57 -26 -37 12 10 -37 19 33 -37 8 40 -37 23 4 0.89 -160 0 0 -37 0 32 8 42 14.7 17 56 -27 -36 56 51 -37 4 13 -36 53 21 -37 7 44 0.89 -159 0 0 -36 45 19 8 42 11.3 17 56 -27 -36 41 39 -36 49 1 -36 38 9 -36 52 31 0.89 -158 0 0 -36 30 14 8 42 7.8 18 55 -28 -36 26 33 -36 33 54 -36 23 3 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-145 0 0 -33 26 56 8 41 8.4 28 46 -34 -33 23 18 -33 30 33 -33 19 52 -33 34 0 0.90 -144 0 0 -33 14 0 8 41 2.8 29 45 -35 -33 10 23 -33 17 38 -33 6 57 -33 21 5 0.91 -143 0 0 -33 1 17 8 40 57.1 30 44 -35 -32 57 40 -33 4 54 -32 54 14 -33 8 21 0.91 -142 0 0 -32 48 45 8 40 51.3 30 44 -35 -32 45 9 -32 52 22 -32 41 43 -32 55 48 0.91 -141 0 0 -32 36 26 8 40 45.3 31 43 -36 -32 32 49 -32 40 2 -32 29 24 -32 43 28 0.91 -140 0 0 -32 24 19 8 40 39.2 32 42 -36 -32 20 42 -32 27 55 -32 17 17 -32 31 21 0.91 -139 0 0 -32 12 24 8 40 33.0 33 41 -36 -32 8 48 -32 16 0 -32 5 23 -32 19 26 0.91 -138 0 0 -32 0 42 8 40 26.6 33 40 -37 -31 57 7 -32 4 18 -31 53 42 -32 7 44 0.91 -137 0 0 -31 49 14 8 40 20.2 34 39 -37 -31 45 38 -31 52 49 -31 42 14 -31 56 15 0.91 -136 0 0 -31 37 59 8 40 13.6 35 39 -37 -31 34 24 -31 41 34 -31 30 59 -31 44 59 0.91 -135 0 0 -31 26 57 8 40 6.9 35 38 -37 -31 23 22 -31 30 32 -31 19 58 -31 33 57 0.91 -134 0 0 -31 16 9 8 40 0.1 36 37 -37 -31 12 35 -31 19 44 -31 9 11 -31 23 8 0.91 -133 0 0 -31 5 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25 -38 47 59 -38 55 25 -38 44 27 -38 58 57 1.26 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 742-00439-1 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 13 49.7310 DE: +14 36 58.655 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 13 49.7310 DE: +14 36 58.655 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.2 * B mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (13737) 1998 RU76 asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.008 distance from Earth [AU]: 1.67830 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#42 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): 0.018", 0.004", 86.011° remarks: * orbital elements for (13737)1998 RU76 : Mean anomaly = 98.4942786821 deg Arg. of pericenter = 168.9491291245 deg Long. of node = 149.3878027436 deg Inclination = 6.2129488742 deg Eccentricity = 0.2524002144 Semimajor axis = 2.3661068318 AU Perihelion dist = 1.7689009601 AU Mag: H = 14.29, G = 0.15 Epoch of elements : MJD 60642.35806638 TDT (2024 Nov 28.3581) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#422023Apr25,0.87,2024,11,28,8.593584,0.021520,-0.671698,-6.158794,-0.197175,-0.002670,0.000870,0.000001,0.000000 -102.8265,14.6102,48.11,-21.41,False TYC 742-00439-1,6.23048082,14.6162932,11.35,11.22,11.15,0.0,0,,6.25447854,14.6101964,6.93,6.55,0,0,0 13737,1998 RU76,18.14,9.527,1.6783,0,0,-2.224,-1.03,,0.6,0 0,98.3973,2024,11,28,168.9491,149.3878,6.2129,0.25240,2.36611,1.76890,14.29,5.0,0.15 1.476,0.0183,0.0037,86,0.0037,Known errors,1.15,0,-1,-1 20241128_0439-1,60140.72 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org