IOTA/IOTA-ES occultation update for (2336) Xinjiang / UCAC4 336-152851 event on 2024 Apr 03, 19:53 UT Visible from Summary ------- On 2024 Apr 03 UT, the 21.856 km diameter asteroid (2336) Xinjiang will occult a 11.1 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 7.13 mag to 18.27 mag (the magnitude of the asteroid) for at most 2.140 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 Apr 03, 19:43 - 2024 Apr 03, 20:04 * geocentric midpoint of event [JD]: 2460404.32907984 * magnitude of target star: 11.14 * magnitude drop [mag]: 7.13 * estimated maximum duration [s]: 2.140 * Moon: 31 % sunlit, 30° distance * Sun: 98° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 22 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.001", 90°) * approx speed of asteroid's shadow [km/s]: 10.2112 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 336-152851 by 2336 Xinjiang on 2024 Apr 3 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 55 0 0 -11 16 14 19 43 41.8 1 113 -79 -11 22 51 -11 9 36 -11 24 21 -11 8 7 .... 56 0 0 -11 41 51 19 43 42.1 2 113 -79 -11 48 29 -11 35 13 -11 49 58 -11 33 44 0.24 57 0 0 -12 7 29 19 43 42.7 3 113 -80 -12 14 7 -12 0 51 -12 15 36 -11 59 22 0.24 58 0 0 -12 33 8 19 43 43.5 4 113 -80 -12 39 46 -12 26 30 -12 41 15 -12 25 0 0.24 59 0 0 -12 58 46 19 43 44.4 5 112 -81 -13 5 24 -12 52 8 -13 6 53 -12 50 38 0.23 60 0 0 -13 24 23 19 43 45.7 6 112 -81 -13 31 1 -13 17 44 -13 32 30 -13 16 15 0.23 61 0 0 -13 49 58 19 43 47.1 7 112 -81 -13 56 36 -13 43 20 -13 58 5 -13 41 50 0.23 62 0 0 -14 15 30 19 43 48.7 8 112 -81 -14 22 9 -14 8 52 -14 23 38 -14 7 23 0.23 63 0 0 -14 41 0 19 43 50.6 10 111 -81 -14 47 38 -14 34 22 -14 49 7 -14 32 53 0.23 64 0 0 -15 6 26 19 43 52.7 11 111 -81 -15 13 4 -14 59 48 -15 14 33 -14 58 19 0.23 65 0 0 -15 31 47 19 43 55.0 12 111 -80 -15 38 25 -15 25 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28 255 51 -22 15 27 -22 2 21 -22 16 55 -22 0 53 0.23 -147 0 0 -21 46 12 20 2 55.5 27 254 52 -21 52 46 -21 39 39 -21 54 14 -21 38 10 0.24 -146 0 0 -21 23 16 20 3 0.5 26 254 53 -21 29 50 -21 16 42 -21 31 19 -21 15 14 0.24 -145 0 0 -21 0 7 20 3 5.4 25 254 54 -21 6 42 -20 53 33 -21 8 10 -20 52 5 0.24 -144 0 0 -20 36 45 20 3 10.0 24 253 55 -20 43 20 -20 30 11 -20 44 49 -20 28 42 0.24 -143 0 0 -20 13 11 20 3 14.6 23 253 56 -20 19 46 -20 6 36 -20 21 15 -20 5 7 0.24 -142 0 0 -19 49 25 20 3 18.9 22 252 57 -19 56 0 -19 42 49 -19 57 29 -19 41 21 0.24 -141 0 0 -19 25 27 20 3 23.1 20 252 58 -19 32 3 -19 18 51 -19 33 32 -19 17 23 0.24 -140 0 0 -19 1 19 20 3 27.0 19 252 58 -19 7 55 -18 54 43 -19 9 24 -18 53 14 0.24 -139 0 0 -18 37 1 20 3 30.8 18 251 59 -18 43 37 -18 30 24 -18 45 6 -18 28 56 0.24 -138 0 0 -18 12 33 20 3 34.4 17 251 60 -18 19 10 -18 5 56 -18 20 39 -18 4 27 0.24 -137 0 0 -17 47 56 20 3 37.8 16 251 61 -17 54 33 -17 41 19 -17 56 2 -17 39 50 0.24 -136 0 0 -17 23 11 20 3 41.0 15 250 62 -17 29 48 -17 16 33 -17 31 17 -17 15 4 0.25 -135 0 0 -16 58 18 20 3 44.0 14 250 63 -17 4 55 -16 51 40 -17 6 24 -16 50 11 0.25 -134 0 0 -16 33 17 20 3 46.8 13 250 64 -16 39 55 -16 26 40 -16 41 24 -16 25 11 0.25 -133 0 0 -16 8 10 20 3 49.3 12 249 65 -16 14 48 -16 1 33 -16 16 17 -16 0 4 0.25 -132 0 0 -15 42 58 20 3 51.7 11 249 66 -15 49 36 -15 36 20 -15 51 5 -15 34 51 0.25 -131 0 0 -15 17 40 20 3 53.9 10 249 66 -15 24 18 -15 11 2 -15 25 47 -15 9 33 0.26 -130 0 0 -14 52 17 20 3 55.8 9 249 67 -14 58 55 -14 45 39 -15 0 24 -14 44 10 0.26 -129 0 0 -14 26 50 20 3 57.6 8 248 68 -14 33 28 -14 20 12 -14 34 58 -14 18 43 0.26 -128 0 0 -14 1 20 20 3 59.1 7 248 69 -14 7 58 -13 54 42 -14 9 28 -13 53 13 0.27 -127 0 0 -13 35 47 20 4 0.4 6 248 70 -13 42 26 -13 29 9 -13 43 55 -13 27 40 0.28 -126 0 0 -13 10 13 20 4 1.5 5 248 70 -13 16 51 -13 3 35 -13 18 20 -13 2 5 0.29 -125 0 0 -12 44 36 20 4 2.4 4 247 71 -12 51 15 -12 37 58 -12 52 44 -12 36 29 0.30 -124 0 0 -12 18 59 20 4 3.0 3 247 72 -12 25 38 -12 12 22 -12 27 7 -12 10 52 0.34 -123 0 0 -11 53 22 20 4 3.4 1 247 72 -12 0 0 -11 46 45 -12 1 30 -11 45 16 0.41 -122 0 0 -11 27 46 20 4 3.6 0 247 73 -11 34 24 -11 21 8 -11 35 53 -11 19 39 0.87 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: UCAC4 336-152851 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 27 29.9713 DE: -22 54 18.860 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 27 29.9713 DE: -22 54 18.860 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.1 * B mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2336) Xinjiang asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.009 distance from Earth [AU]: 3.23110 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): 0.016", 0.001", 90.4° remarks: * orbital elements for (2336)Xinjiang : Mean anomaly = 121.5816547774 deg Arg. of pericenter = 36.9556901057 deg Long. of node = 87.2071635085 deg Inclination = 2.7871469491 deg Eccentricity = 0.1625198008 Semimajor axis = 3.1861777372 AU Perihelion dist = 2.6683607659 AU Mag: H = 12.11, G = 0.15 Epoch of elements : MJD 60403.82907946 TDT (2024 Apr 03.8291) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,2.14,2024,4,3,19.897916,-0.000974,-0.207314,5.763441,-0.022992,-0.005839,-0.000295,0.000000,0.000000 146.1392,-22.8913,-117.71,5.73,False UCAC4 336-152851,18.45832533,-22.9052390,11.30,11.14,11.05,0.0,0,,18.48277721,-22.8912590,7.13,6.76,0,0,0 2336,Xinjiang,18.27,21.856,3.2311,0,0,1.136,-0.06,,1.8,0 0,121.4380,2024,4,3,36.9557,87.2072,2.7871,0.16252,3.18618,2.66836,12.11,5.0,0.15 1.112,0.0160,0.0010,90,0.0010,Known errors,1.53,0,-1,-1 20240403_152851,60139.27 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org