IOTA/IOTA-ES occultation update for (36262) 1999 XO117 / HIP 93670 event on 2024 Apr 06, 09:50 UT Visible from Summary ------- On 2024 Apr 06 UT, the 13.3460021677343 km diameter asteroid (36262) 1999 XO117 will occult a 9.6 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 9.12 mag to 18.75 mag (the magnitude of the asteroid) for at most 0.850 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: 67 * date and approx. time of event: 2024 Apr 06, 09:43 - 2024 Apr 06, 09:56 * geocentric midpoint of event [JD]: 2460406.90994692 * magnitude of target star: 9.63 * magnitude drop [mag]: 9.12 * estimated maximum duration [s]: 0.850 * Moon: 8 % sunlit, 60° distance * Sun: 93° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.90 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.003", 85°) * approx speed of asteroid's shadow [km/s]: 15.9380 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 93670 by 36262 1999 XO117 on 2024 Apr 6 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 -145 0 0 - 2 37 39 9 43 50.8 1 121 -86 - 2 42 5 - 2 33 13 - 2 50 1 - 2 25 17 .... -144 0 0 - 3 14 7 9 43 51.0 2 121 -86 - 3 18 34 - 3 9 41 - 3 26 32 - 3 1 44 0.27 -143 0 0 - 3 50 56 9 43 51.4 3 121 -86 - 3 55 23 - 3 46 29 - 4 3 22 - 3 38 31 0.27 -142 0 0 - 4 28 4 9 43 52.0 5 121 -86 - 4 32 32 - 4 23 36 - 4 40 32 - 4 15 36 0.27 -141 0 0 - 5 5 30 9 43 52.7 6 120 -85 - 5 9 58 - 5 1 1 - 5 18 0 - 4 53 0 0.26 -140 0 0 - 5 43 12 9 43 53.7 7 120 -85 - 5 47 42 - 5 38 43 - 5 55 44 - 5 30 42 0.26 -139 0 0 - 6 21 11 9 43 54.8 8 120 -84 - 6 25 41 - 6 16 41 - 6 33 44 - 6 8 39 0.26 -138 0 0 - 6 59 24 9 43 56.1 9 120 -83 - 7 3 55 - 6 54 54 - 7 11 59 - 6 46 50 0.26 -137 0 0 - 7 37 51 9 43 57.5 10 120 -82 - 7 42 22 - 7 33 20 - 7 50 28 - 7 25 15 0.26 -136 0 0 - 8 16 30 9 43 59.2 12 120 -81 - 8 21 2 - 8 11 58 - 8 29 8 - 8 3 53 0.26 -135 0 0 - 8 55 20 9 44 1.0 13 120 -79 - 8 59 52 - 8 50 48 - 9 7 59 - 8 42 41 0.26 -134 0 0 - 9 34 19 9 44 2.9 14 120 -78 - 9 38 52 - 9 29 47 - 9 47 0 - 9 21 39 0.26 -133 0 0 -10 13 27 9 44 5.1 15 119 -77 -10 18 0 -10 8 54 -10 26 9 -10 0 46 0.26 -132 0 0 -10 52 41 9 44 7.4 16 119 -76 -10 57 15 -10 48 8 -11 5 24 -10 39 59 0.26 -131 0 0 -11 32 1 9 44 9.9 18 119 -75 -11 36 35 -11 27 28 -11 44 45 -11 19 18 0.26 -130 0 0 -12 11 25 9 44 12.6 19 119 -74 -12 15 59 -12 6 51 -12 24 10 -11 58 42 0.26 -129 0 0 -12 50 52 9 44 15.4 20 118 -73 -12 55 27 -12 46 18 -13 3 38 -12 38 8 0.26 -128 0 0 -13 30 20 9 44 18.4 21 118 -71 -13 34 55 -13 25 46 -13 43 6 -13 17 35 0.26 -127 0 0 -14 9 48 9 44 21.5 22 118 -70 -14 14 23 -14 5 14 -14 22 35 -13 57 2 0.26 -126 0 0 -14 49 15 9 44 24.8 23 118 -69 -14 53 50 -14 44 40 -15 2 2 -14 36 28 0.26 -125 0 0 -15 28 38 9 44 28.2 25 117 -68 -15 33 13 -15 24 3 -15 41 25 -15 15 51 0.26 -124 0 0 -16 7 57 9 44 31.8 26 117 -67 -16 12 32 -16 3 22 -16 20 45 -15 55 10 0.26 -123 0 0 -16 47 10 9 44 35.6 27 117 -66 -16 51 45 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33 0.29 37 0 0 -26 35 8 9 56 42.4 9 240 56 -26 39 38 -26 30 39 -26 47 39 -26 22 38 0.29 38 0 0 -26 0 52 9 56 43.5 8 240 57 -26 5 22 -25 56 22 -26 13 24 -25 48 20 0.30 39 0 0 -25 26 12 9 56 44.6 7 239 57 -25 30 42 -25 21 42 -25 38 46 -25 13 39 0.30 40 0 0 -24 51 10 9 56 45.5 6 239 57 -24 55 41 -24 46 39 -25 3 45 -24 38 36 0.31 41 0 0 -24 15 47 9 56 46.3 5 238 58 -24 20 18 -24 11 15 -24 28 23 -24 3 11 0.32 42 0 0 -23 40 3 9 56 46.9 4 238 58 -23 44 34 -23 35 31 -23 52 40 -23 27 26 0.34 43 0 0 -23 3 59 9 56 47.4 3 238 58 -23 8 31 -22 59 27 -23 16 38 -22 51 21 0.37 44 0 0 -22 27 37 9 56 47.7 2 237 58 -22 32 9 -22 23 5 -22 40 17 -22 14 59 0.44 45 0 0 -21 50 58 9 56 47.9 1 237 59 -21 55 30 -21 46 25 -22 3 38 -21 38 18 0.75 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: HIP 93670 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 04 30.9354 DE: -30 48 54.640 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 04 30.9355 DE: -30 48 54.640 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.6 * B mag [mag]: 10.4 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (36262) 1999 XO117 asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.82650 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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", 0.003", 84.5° remarks: * orbital elements for (36262)1999 XO117 : Mean anomaly = 283.0335097541 deg Arg. of pericenter = 314.1475527904 deg Long. of node = 27.9137857427 deg Inclination = 9.0330636932 deg Eccentricity = 0.0014826521 Semimajor axis = 3.0448467084 AU Perihelion dist = 3.0403322600 AU Mag: H = 13.10, G = 0.15 Epoch of elements : MJD 60406.40994646 TDT (2024 Apr 06.4099) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr25,0.85,2024,4,6,9.838726,-0.046584,-0.233071,8.821011,-1.765101,-0.005793,-0.000626,0.000000,0.000000 -56.2425,-30.7790,32.99,6.71,False HIP 93670,19.07525981,-30.8151777,10.35,9.63,9.24,0.1,0,,19.10106474,-30.7790416,9.12,9.06,0,0,0 36262,1999 XO117,18.75,13.551,2.8265,0,0,2.130,-5.49,,2.6,0 0,282.9575,2024,4,6,314.1476,27.9138,9.0331,0.00148,3.04485,3.04033,13.10,5.0,0.15 1.894,0.0177,0.0031,85,0.0059,Known errors,1.15,0,-1,-1 20240406__93670,60139.28 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org