IOTA/IOTA-ES occultation update for (210) Isabella / UCAC4-590-019763 event on 2023 Nov 04, 03:23 UT Visible from Europe Summary ------- On 2023 Nov 04 UT, the 76.4 km diameter asteroid (210) Isabella will occult a 12.3 mag star in the constellation Taurus for observers along a path across Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.28 mag to 13.22 mag (the magnitude of the asteroid) for at most 18.930 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: 2023 Nov 04, 03:00 - 2023 Nov 04, 03:46 * geocentric midpoint of event [JD]: 2460252.64128458 * magnitude of target star: 12.34 * magnitude drop [mag]: 1.28 * estimated maximum duration [s]: 18.930 * Moon: 61 % sunlit, 34° distance * Sun: 137° distance * rough path description: Europe Additional comments ------------------- RUWE The occultation path -------------------- * approximate projected width [km]: 91 * 1 sigma uncertainty interval [path widths]: +/- 0.18 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.001", 84°) * approx speed of asteroid's shadow [km/s]: 4.0368 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-590-019763 by 210 Isabella on 2023 Nov 4 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 0 0 0 .. .. .... .. .. .. .. .. .. 58 2 28 .. .. .. 58 19 53 .. .. .. .... -160 0 1 58 9 28 3 45 26.0 1 31 -8 58 57 11 57 22 35 59 14 30 57 5 57 .... -159 0 1 59 2 36 3 45 25.1 2 32 -9 59 50 0 58 16 1 60 7 13 57 59 29 -0.54 -158 0 1 59 53 54 3 45 23.5 3 33 -9 60 40 58 59 7 37 60 58 3 58 51 12 -0.56 -157 0 1 60 43 22 3 45 21.5 4 34 -10 61 30 5 59 57 26 61 47 2 59 41 9 -0.57 -156 0 1 61 31 3 3 45 19.1 5 35 -11 62 17 23 60 45 29 62 34 12 60 29 19 -0.58 -155 0 1 62 16 59 3 45 16.3 6 35 -11 63 2 55 61 31 48 63 19 36 61 15 46 -0.59 -154 0 1 63 1 12 3 45 13.1 7 36 -12 63 46 43 62 16 25 64 3 14 62 0 32 -0.59 -153 0 1 63 43 44 3 45 9.7 7 37 -12 64 28 49 62 59 23 64 45 11 62 43 38 -0.59 -152 0 1 64 24 39 3 45 5.9 8 38 -13 65 9 17 63 40 43 65 25 29 63 25 7 -0.60 -151 0 1 65 3 58 3 45 2.0 9 39 -13 65 48 9 64 20 29 66 4 11 64 5 3 -0.60 -150 0 1 65 41 46 3 44 57.9 10 40 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53 31 26 40 29 41 9 -0.62 42 0 0 29 28 29 3 12 36.7 47 281 -4 30 7 11 28 50 15 30 21 10 28 36 39 -0.61 43 0 0 28 23 43 3 12 5.3 46 282 -3 29 2 2 27 45 50 29 15 54 27 32 21 -0.61 44 0 0 27 19 13 3 11 34.3 45 283 -2 27 57 10 26 41 41 28 10 53 26 28 20 -0.61 45 0 0 26 15 1 3 11 3.8 44 285 -1 26 52 36 25 37 51 27 6 12 25 24 36 -0.61 46 0 0 25 11 11 3 10 33.9 43 286 0 25 48 24 24 34 21 26 1 51 24 21 14 -0.61 47 0 0 24 7 45 3 10 4.6 42 287 1 24 44 36 23 31 16 24 57 56 23 18 16 -0.60 48 0 0 23 4 45 3 9 35.9 41 288 3 23 41 16 22 28 37 23 54 27 22 15 44 -0.60 49 0 0 22 2 15 3 9 7.8 40 289 4 22 38 24 21 26 27 22 51 28 21 13 41 -0.60 50 0 0 21 0 16 3 8 40.4 38 290 5 21 36 4 20 24 48 21 49 0 20 12 9 -0.60 51 0 0 19 58 50 3 8 13.8 37 291 6 20 34 18 19 23 42 20 47 7 19 11 11 -0.60 52 0 0 18 58 1 3 7 47.8 36 291 7 19 33 9 18 23 12 19 45 50 18 10 48 -0.60 53 0 0 17 57 49 3 7 22.6 35 292 8 18 32 37 17 23 20 18 45 11 17 11 2 -0.60 54 0 0 16 58 18 3 6 58.2 34 293 9 17 32 46 16 24 8 17 45 13 16 11 56 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59 44 5 11 20 3 48 56 -0.60 69 0 0 3 43 23 3 2 34.5 16 298 26 4 13 33 3 13 24 4 24 25 3 2 42 -0.61 70 0 0 2 57 49 3 2 23.9 15 298 28 3 27 44 2 28 4 3 38 31 2 17 27 -0.61 71 0 0 2 13 14 3 2 14.2 13 298 29 2 42 55 1 43 44 2 53 37 1 33 12 -0.61 72 0 0 1 29 41 3 2 5.4 12 298 30 1 59 8 1 0 25 2 9 45 0 49 57 -0.62 73 0 0 0 47 9 3 1 57.4 11 298 31 1 16 22 0 18 6 1 26 54 0 7 43 -0.62 74 0 0 0 5 38 3 1 50.2 10 298 32 0 34 38 - 0 23 12 0 45 5 - 0 33 30 -0.63 75 0 0 - 0 34 51 3 1 43.9 9 298 33 - 0 6 4 - 1 3 28 0 4 18 - 1 13 41 -0.63 76 0 0 - 1 14 18 3 1 38.4 8 298 34 - 0 45 44 - 1 42 42 - 0 35 27 - 1 52 51 -0.64 77 0 0 - 1 52 42 3 1 33.8 6 298 36 - 1 24 21 - 2 20 54 - 1 14 8 - 2 30 59 -0.66 78 0 0 - 2 30 5 3 1 29.9 5 298 37 - 2 1 55 - 2 58 5 - 1 51 47 - 3 8 5 -0.68 79 0 0 - 3 6 24 3 1 26.8 4 298 38 - 2 38 27 - 3 34 13 - 2 28 23 - 3 44 9 -0.70 80 0 0 - 3 41 42 3 1 24.5 3 298 39 - 3 13 55 - 4 9 19 - 3 3 55 - 4 19 11 -0.75 81 0 0 - 4 15 56 3 1 22.9 2 298 40 - 3 48 21 - 4 43 23 - 3 38 25 - 4 53 11 -0.86 82 0 0 - 4 49 8 3 1 22.1 1 298 41 - 4 21 44 - 5 16 24 - 4 11 52 - 5 26 9 -1.31 Uncertainty in time = +/- 5 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4-590-019763 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 33 32.5143 DE: +27 55 21.581 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 33 32.5143 DE: +27 55 21.581 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (210) Isabella asteroid class: approx. diameter [km]: 76 approx. diameter ["]: 0.067 distance from Earth [AU]: 1.58210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#129 date of fit: 2023 Oct 09 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): 0.017", 0.001", 84.233° remarks: * orbital elements for (210)Isabella : Mean anomaly = 16.6227542183 deg Arg. of pericenter = 13.9295896514 deg Long. of node = 32.5553512788 deg Inclination = 5.2600658223 deg Eccentricity = 0.1240740615 Semimajor axis = 2.7224068390 AU Perihelion dist = 2.3846267655 AU Mag: H = 9.43, G = 0.15 Epoch of elements : MJD 60252.14125000 TDT (2023 Nov 04.1412) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1292023Oct09,18.93,2023,11,4,3.390830,0.342057,0.425084,-1.775094,1.428502,-0.003883,-0.000505,0.000001,0.000000 -10.2217,27.9396,125.03,-15.26,False UCAC4-590-019763,5.55903173,27.9226614,0.00,12.34,0.00,0.0,0,,5.58420137,27.9395981,1.28,0.00,0,0,0 210,Isabella,13.22,76.400,1.5821,0,0,-0.745,7.94,,4.2,0 0,16.5918,2023,11,4,13.9296,32.5554,5.2601,0.12407,2.72241,2.38463,9.44,5.0,0.15 1.179,0.0170,0.0005,84,0.0170,Known errors,-1.00,0,-1,-1 20231104_019763,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org