IOTA/IOTA-ES occultation update for (2819) Ensor / UCAC4 330-191089 event on 2024 Nov 01, 16:34 UT Visible from Summary ------- On 2024 Nov 01 UT, the 11.435 km diameter asteroid (2819) Ensor will occult a 12.0 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 5.07 mag to 17.01 mag (the magnitude of the asteroid) for at most 0.400 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 Nov 01, 16:31 - 2024 Nov 01, 16:38 * geocentric midpoint of event [JD]: 2460616.19094617 * magnitude of target star: 11.95 * magnitude drop [mag]: 5.07 * estimated maximum duration [s]: 0.400 * Moon: 0 % sunlit, 69° distance * Sun: 70° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.002", 81°) * approx speed of asteroid's shadow [km/s]: 28.6863 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 330-191089 by 2819 Ensor on 2024 Nov 1 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 - 97 0 0 -20 1 44 16 31 19.8 0 116 65 -20 5 15 -19 58 13 -20 7 32 -19 55 56 .... - 96 0 0 -20 28 55 16 31 19.9 1 115 66 -20 32 25 -20 25 24 -20 34 42 -20 23 7 0.24 - 95 0 0 -20 55 51 16 31 20.0 2 115 67 -20 59 21 -20 52 20 -21 1 38 -20 50 4 0.23 - 94 0 0 -21 22 31 16 31 20.2 3 115 68 -21 26 1 -21 19 1 -21 28 18 -21 16 45 0.22 - 93 0 0 -21 48 57 16 31 20.5 4 114 69 -21 52 26 -21 45 27 -21 54 43 -21 43 11 0.22 - 92 0 0 -22 15 6 16 31 20.8 5 114 70 -22 18 35 -22 11 36 -22 20 51 -22 9 20 0.21 - 91 0 0 -22 40 58 16 31 21.2 6 113 70 -22 44 27 -22 37 29 -22 46 43 -22 35 13 0.21 - 90 0 0 -23 6 33 16 31 21.7 7 113 71 -23 10 2 -23 3 4 -23 12 17 -23 0 48 0.21 - 89 0 0 -23 31 50 16 31 22.3 8 113 72 -23 35 19 -23 28 22 -23 37 34 -23 26 6 0.21 - 88 0 0 -23 56 49 16 31 22.9 9 112 72 -24 0 17 -23 53 21 -24 2 33 -23 51 6 0.21 - 87 0 0 -24 21 30 16 31 23.6 10 112 73 -24 24 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21 248 -48 - 9 40 17 - 9 33 12 - 9 42 35 - 9 30 53 0.22 73 0 0 - 9 6 48 16 38 22.9 19 248 -49 - 9 10 21 - 9 3 16 - 9 12 39 - 9 0 57 0.22 74 0 0 - 8 36 55 16 38 24.3 18 247 -50 - 8 40 28 - 8 33 23 - 8 42 46 - 8 31 5 0.22 75 0 0 - 8 7 6 16 38 25.6 17 247 -51 - 8 10 38 - 8 3 33 - 8 12 56 - 8 1 15 0.22 76 0 0 - 7 37 21 16 38 26.9 16 247 -53 - 7 40 53 - 7 33 49 - 7 43 11 - 7 31 31 0.22 77 0 0 - 7 7 42 16 38 28.1 15 247 -54 - 7 11 14 - 7 4 10 - 7 13 32 - 7 1 52 0.22 78 0 0 - 6 38 9 16 38 29.2 14 247 -55 - 6 41 41 - 6 34 37 - 6 43 59 - 6 32 20 0.23 79 0 0 - 6 8 44 16 38 30.2 13 247 -56 - 6 12 15 - 6 5 12 - 6 14 33 - 6 2 55 0.23 80 0 0 - 5 39 26 16 38 31.1 12 247 -57 - 5 42 57 - 5 35 55 - 5 45 15 - 5 33 37 0.23 81 0 0 - 5 10 17 16 38 32.0 11 246 -58 - 5 13 48 - 5 6 46 - 5 16 5 - 5 4 29 0.23 82 0 0 - 4 41 17 16 38 32.7 9 246 -59 - 4 44 48 - 4 37 47 - 4 47 5 - 4 35 30 0.23 83 0 0 - 4 12 28 16 38 33.4 8 246 -60 - 4 15 59 - 4 8 58 - 4 18 16 - 4 6 41 0.24 84 0 0 - 3 43 50 16 38 34.0 7 246 -61 - 3 47 20 - 3 40 20 - 3 49 37 - 3 38 3 0.24 85 0 0 - 3 15 24 16 38 34.5 6 246 -62 - 3 18 54 - 3 11 54 - 3 21 10 - 3 9 37 0.25 86 0 0 - 2 47 10 16 38 34.9 5 246 -63 - 2 50 39 - 2 43 40 - 2 52 56 - 2 41 24 0.26 87 0 0 - 2 19 9 16 38 35.3 4 246 -64 - 2 22 38 - 2 15 39 - 2 24 54 - 2 13 23 0.27 88 0 0 - 1 51 22 16 38 35.5 3 246 -65 - 1 54 51 - 1 47 52 - 1 57 7 - 1 45 37 0.30 89 0 0 - 1 23 49 16 38 35.7 2 246 -67 - 1 27 18 - 1 20 20 - 1 29 33 - 1 18 5 0.36 90 0 0 - 0 56 31 16 38 35.8 1 246 -68 - 1 0 0 - 0 53 3 - 1 2 15 - 0 50 48 0.61 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 330-191089 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 24 06.1261 DE: -24 08 01.743 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 24 06.1259 DE: -24 08 01.743 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2819) Ensor asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.49630 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.012", 0.002", 81.251° remarks: * orbital elements for (2819)Ensor : Mean anomaly = 325.8523731433 deg Arg. of pericenter = 344.5323990534 deg Long. of node = 18.2367215704 deg Inclination = 2.4298554139 deg Eccentricity = 0.2014819543 Semimajor axis = 2.7593109843 AU Perihelion dist = 2.2033596145 AU Mag: H = 12.07, G = 0.15 Epoch of elements : MJD 60615.69094588 TDT (2024 Nov 01.6909) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,0.40,2024,11,1,16.582708,0.035611,-0.192199,15.918251,2.961132,0.005286,0.000705,-0.000001,0.000000 1.2027,-24.0868,-72.85,-14.74,False UCAC4 330-191089,19.40170172,-24.1338173,12.21,11.95,11.81,0.0,0,,19.42657945,-24.0867834,5.07,4.77,0,0,0 2819,Ensor,17.01,11.435,2.4963,0,0,4.095,10.44,,0.6,0 0,325.7038,2024,11,1,344.5324,18.2367,2.4299,0.20148,2.75931,2.20336,12.07,5.0,0.15 1.325,0.0123,0.0020,81,0.0021,Known errors,0.94,0,-1,-1 20241101_191089,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org