IOTA/IOTA-ES occultation update for (2591) Dworetsky / TYC 6861-01966-1 event on 2024 Oct 11, 10:04 UT Visible from Summary ------- On 2024 Oct 11 UT, the 12.947 km diameter asteroid (2591) Dworetsky will occult a 11.4 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 5.78 mag to 17.17 mag (the magnitude of the asteroid) for at most 0.550 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 Oct 11, 10:00 - 2024 Oct 11, 10:09 * geocentric midpoint of event [JD]: 2460594.91979654 * magnitude of target star: 11.40 * magnitude drop [mag]: 5.78 * estimated maximum duration [s]: 0.550 * Moon: 57 % sunlit, 21° distance * Sun: 78° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.001", 87°) * approx speed of asteroid's shadow [km/s]: 23.6776 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6861-01966-1 by 2591 Dworetsky on 2024 Oct 11 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 20 0 0 4 35 6 10 0 5.4 1 115 76 4 31 11 4 39 1 4 29 49 4 40 23 .... 21 0 0 4 7 36 10 0 5.5 2 115 77 4 3 41 4 11 31 4 2 19 4 12 53 -0.06 22 0 0 3 40 15 10 0 5.8 3 115 78 3 36 20 3 44 10 3 34 58 3 45 31 -0.10 23 0 0 3 13 2 10 0 6.1 4 115 79 3 9 8 3 16 57 3 7 46 3 18 18 -0.12 24 0 0 2 45 59 10 0 6.6 5 115 80 2 42 4 2 49 53 2 40 43 2 51 15 -0.13 25 0 0 2 19 5 10 0 7.1 6 115 80 2 15 11 2 23 0 2 13 50 2 24 21 -0.14 26 0 0 1 52 23 10 0 7.7 8 115 81 1 48 29 1 56 17 1 47 8 1 57 38 -0.14 27 0 0 1 25 52 10 0 8.5 9 115 81 1 21 59 1 29 45 1 20 37 1 31 7 -0.15 28 0 0 0 59 33 10 0 9.3 10 115 82 0 55 40 1 3 26 0 54 19 1 4 47 -0.15 29 0 0 0 33 27 10 0 10.2 11 115 82 0 29 34 0 37 20 0 28 13 0 38 41 -0.15 30 0 0 0 7 34 10 0 11.3 12 115 82 0 3 42 0 11 27 0 2 21 0 12 48 -0.15 31 0 0 - 0 18 5 10 0 12.4 13 115 82 - 0 21 57 - 0 14 12 - 0 23 18 - 0 12 52 -0.16 32 0 0 - 0 43 29 10 0 13.6 14 115 82 - 0 47 21 - 0 39 37 - 0 48 41 - 0 38 16 -0.16 33 0 0 - 1 8 38 10 0 14.9 15 115 81 - 1 12 29 - 1 4 46 - 1 13 50 - 1 3 26 -0.16 34 0 0 - 1 33 31 10 0 16.3 16 115 81 - 1 37 22 - 1 29 40 - 1 38 43 - 1 28 19 -0.16 35 0 0 - 1 58 8 10 0 17.8 17 115 80 - 2 1 59 - 1 54 17 - 2 3 19 - 1 52 57 -0.16 36 0 0 - 2 22 28 10 0 19.4 18 115 79 - 2 26 19 - 2 18 38 - 2 27 39 - 2 17 18 -0.16 37 0 0 - 2 46 31 10 0 21.1 20 115 79 - 2 50 21 - 2 42 41 - 2 51 41 - 2 41 21 -0.16 38 0 0 - 3 10 16 10 0 22.9 21 115 78 - 3 14 6 - 3 6 26 - 3 15 26 - 3 5 6 -0.16 39 0 0 - 3 33 42 10 0 24.7 22 115 77 - 3 37 32 - 3 29 53 - 3 38 52 - 3 28 33 -0.16 40 0 0 - 3 56 50 10 0 26.7 23 115 76 - 4 0 39 - 3 53 1 - 4 1 59 - 3 51 41 -0.16 41 0 0 - 4 19 38 10 0 28.7 24 115 75 - 4 23 27 - 4 15 50 - 4 24 47 - 4 14 30 -0.17 42 0 0 - 4 42 7 10 0 30.8 25 115 74 - 4 45 55 - 4 38 19 - 4 47 15 - 4 37 0 -0.17 43 0 0 - 5 4 16 10 0 33.0 26 115 73 - 5 8 3 - 5 0 28 - 5 9 23 - 4 59 9 -0.17 44 0 0 - 5 26 3 10 0 35.3 27 115 73 - 5 29 51 - 5 22 16 - 5 31 10 - 5 20 57 -0.17 45 0 0 - 5 47 30 10 0 37.7 28 115 72 - 5 51 17 - 5 43 43 - 5 52 36 - 5 42 24 -0.17 46 0 0 - 6 8 36 10 0 40.1 29 115 71 - 6 12 22 - 6 4 49 - 6 13 41 - 6 3 30 -0.17 47 0 0 - 6 29 20 10 0 42.6 30 115 70 - 6 33 6 - 6 25 34 - 6 34 24 - 6 24 15 -0.17 48 0 0 - 6 49 41 10 0 45.2 31 115 69 - 6 53 27 - 6 45 56 - 6 54 46 - 6 44 37 -0.17 49 0 0 - 7 9 41 10 0 47.8 32 115 68 - 7 13 26 - 7 5 55 - 7 14 44 - 7 4 37 -0.17 50 0 0 - 7 29 17 10 0 50.6 33 115 67 - 7 33 2 - 7 25 33 - 7 34 21 - 7 24 14 -0.17 51 0 0 - 7 48 31 10 0 53.4 34 115 66 - 7 52 16 - 7 44 47 - 7 53 34 - 7 43 28 -0.17 52 0 0 - 8 7 21 10 0 56.3 35 115 65 - 8 11 5 - 8 3 37 - 8 12 23 - 8 2 19 -0.17 53 0 0 - 8 25 48 10 0 59.2 36 114 64 - 8 29 32 - 8 22 4 - 8 30 50 - 8 20 47 -0.17 54 0 0 - 8 43 51 10 1 2.2 38 114 63 - 8 47 34 - 8 40 8 - 8 48 52 - 8 38 50 -0.17 55 0 0 - 9 1 30 10 1 5.3 39 114 62 - 9 5 13 - 8 57 47 - 9 6 30 - 8 56 29 -0.17 56 0 0 - 9 18 45 10 1 8.4 40 114 61 - 9 22 27 - 9 15 2 - 9 23 44 - 9 13 45 -0.17 57 0 0 - 9 35 35 10 1 11.6 41 114 60 - 9 39 17 - 9 31 52 - 9 40 34 - 9 30 35 -0.17 58 0 0 - 9 52 0 10 1 14.8 42 114 59 - 9 55 42 - 9 48 18 - 9 56 59 - 9 47 1 -0.17 59 0 0 -10 8 0 10 1 18.2 43 114 58 -10 11 42 -10 4 19 -10 12 59 -10 3 2 -0.17 60 0 0 -10 23 36 10 1 21.5 44 114 57 -10 27 17 -10 19 55 -10 28 34 -10 18 38 -0.17 61 0 0 -10 38 46 10 1 25.0 45 114 56 -10 42 26 -10 35 5 -10 43 43 -10 33 48 -0.17 62 0 0 -10 53 30 10 1 28.4 46 114 55 -10 57 11 -10 49 50 -10 58 27 -10 48 33 -0.17 63 0 0 -11 7 49 10 1 32.0 47 114 54 -11 11 29 -11 4 9 -11 12 46 -11 2 53 -0.17 64 0 0 -11 21 43 10 1 35.5 48 114 53 -11 25 22 -11 18 3 -11 26 39 -11 16 47 -0.18 65 0 0 -11 35 10 10 1 39.2 49 114 52 -11 38 49 -11 31 31 -11 40 6 -11 30 15 -0.18 66 0 0 -11 48 12 10 1 42.9 50 114 51 -11 51 51 -11 44 33 -11 53 7 -11 43 17 -0.18 67 0 0 -12 0 47 10 1 46.6 51 114 50 -12 4 26 -11 57 8 -12 5 42 -11 55 52 -0.18 68 0 0 -12 12 56 10 1 50.4 52 114 49 -12 16 35 -12 9 18 -12 17 51 -12 8 2 -0.18 69 0 0 -12 24 39 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62 235 -13 -10 12 20 -10 4 57 -10 13 37 -10 3 40 -0.18 131 0 0 - 9 52 35 10 6 30.3 61 236 -14 - 9 56 17 - 9 48 53 - 9 57 34 - 9 47 36 -0.18 132 0 0 - 9 36 6 10 6 34.6 60 236 -15 - 9 39 48 - 9 32 24 - 9 41 6 - 9 31 6 -0.18 133 0 0 - 9 19 12 10 6 38.9 59 236 -16 - 9 22 55 - 9 15 30 - 9 24 12 - 9 14 12 -0.18 134 0 0 - 9 1 53 10 6 43.2 58 237 -17 - 9 5 36 - 8 58 10 - 9 6 54 - 8 56 53 -0.18 135 0 0 - 8 44 10 10 6 47.4 57 237 -18 - 8 47 53 - 8 40 26 - 8 49 11 - 8 39 9 -0.18 136 0 0 - 8 26 2 10 6 51.6 56 237 -20 - 8 29 46 - 8 22 18 - 8 31 4 - 8 21 0 -0.18 137 0 0 - 8 7 30 10 6 55.8 55 238 -21 - 8 11 14 - 8 3 45 - 8 12 32 - 8 2 27 -0.18 138 0 0 - 7 48 34 10 6 59.9 54 238 -22 - 7 52 18 - 7 44 49 - 7 53 36 - 7 43 31 -0.18 139 0 0 - 7 29 14 10 7 4.0 53 238 -23 - 7 32 59 - 7 25 29 - 7 34 17 - 7 24 10 -0.18 140 0 0 - 7 9 31 10 7 8.0 52 238 -24 - 7 13 16 - 7 5 45 - 7 14 35 - 7 4 27 -0.18 141 0 0 - 6 49 25 10 7 12.0 51 239 -25 - 6 53 10 - 6 45 39 - 6 54 29 - 6 44 20 -0.18 142 0 0 - 6 28 56 10 7 16.0 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37 240 -39 - 1 59 40 - 1 51 58 - 2 1 1 - 1 50 37 -0.17 155 0 0 - 1 31 0 10 8 1.9 36 240 -40 - 1 34 52 - 1 27 9 - 1 36 12 - 1 25 48 -0.17 156 0 0 - 1 5 55 10 8 5.0 35 240 -41 - 1 9 47 - 1 2 3 - 1 11 8 - 1 0 42 -0.17 157 0 0 - 0 40 34 10 8 8.0 34 240 -42 - 0 44 26 - 0 36 41 - 0 45 47 - 0 35 21 -0.17 158 0 0 - 0 14 57 10 8 10.9 33 240 -43 - 0 18 49 - 0 11 4 - 0 20 10 - 0 9 43 -0.17 159 0 0 0 10 55 10 8 13.7 32 240 -44 0 7 2 0 14 48 0 5 41 0 16 9 -0.17 160 0 0 0 37 1 10 8 16.5 31 241 -45 0 33 7 0 40 54 0 31 46 0 42 15 -0.17 161 0 0 1 3 20 10 8 19.1 30 241 -46 0 59 26 1 7 13 0 58 5 1 8 35 -0.17 162 0 0 1 29 52 10 8 21.7 29 241 -47 1 25 58 1 33 46 1 24 37 1 35 7 -0.17 163 0 0 1 56 37 10 8 24.2 28 241 -48 1 52 43 2 0 31 1 51 21 2 1 52 -0.17 164 0 0 2 23 33 10 8 26.6 27 241 -49 2 19 39 2 27 27 2 18 17 2 28 49 -0.17 165 0 0 2 50 40 10 8 28.9 25 241 -50 2 46 45 2 54 35 2 45 24 2 55 56 -0.17 166 0 0 3 17 57 10 8 31.1 24 241 -51 3 14 2 3 21 52 3 12 41 3 23 14 -0.17 167 0 0 3 45 24 10 8 33.3 23 241 -52 3 41 29 3 49 19 3 40 7 3 50 41 -0.17 168 0 0 4 13 0 10 8 35.3 22 241 -54 4 9 4 4 16 55 4 7 42 4 18 17 -0.17 169 0 0 4 40 43 10 8 37.2 21 241 -55 4 36 48 4 44 39 4 35 26 4 46 1 -0.17 170 0 0 5 8 34 10 8 39.1 20 242 -56 5 4 38 5 12 30 5 3 16 5 13 52 -0.17 171 0 0 5 36 31 10 8 40.8 19 242 -57 5 32 36 5 40 27 5 31 13 5 41 50 -0.17 172 0 0 6 4 35 10 8 42.5 18 242 -58 6 0 39 6 8 31 5 59 16 6 9 53 -0.17 173 0 0 6 32 43 10 8 44.0 17 242 -59 6 28 47 6 36 39 6 27 25 6 38 2 -0.17 174 0 0 7 0 56 10 8 45.5 16 242 -60 6 56 59 7 4 52 6 55 37 7 6 14 -0.17 175 0 0 7 29 12 10 8 46.9 14 242 -61 7 25 15 7 33 8 7 23 53 7 34 31 -0.17 176 0 0 7 57 31 10 8 48.1 13 242 -62 7 53 34 8 1 27 7 52 12 8 2 50 -0.17 177 0 0 8 25 51 10 8 49.3 12 242 -63 8 21 55 8 29 48 8 20 32 8 31 11 -0.17 178 0 0 8 54 14 10 8 50.3 11 243 -64 8 50 17 8 58 10 8 48 54 8 59 33 -0.17 179 0 0 9 22 36 10 8 51.3 10 243 -65 9 18 39 9 26 33 9 17 17 9 27 55 -0.17 180 0 0 9 50 58 10 8 52.2 9 243 -66 9 47 1 9 54 55 9 45 39 9 56 18 -0.17 -179 0 0 10 19 19 10 8 52.9 8 243 -67 10 15 23 10 23 16 10 14 0 10 24 39 -0.16 -178 0 0 10 47 39 10 8 53.6 7 243 -68 10 43 42 10 51 36 10 42 19 10 52 58 -0.16 -177 0 0 11 15 55 10 8 54.1 6 244 -68 11 11 59 11 19 52 11 10 36 11 21 15 -0.16 -176 0 0 11 44 9 10 8 54.6 5 244 -69 11 40 12 11 48 6 11 38 50 11 49 28 -0.16 -175 0 0 12 12 18 10 8 55.0 4 244 -70 12 8 21 12 16 15 12 6 59 12 17 38 -0.16 -174 0 0 12 40 23 10 8 55.2 2 244 -71 12 36 26 12 44 20 12 35 4 12 45 42 -0.15 -173 0 0 13 8 22 10 8 55.4 1 244 -72 13 4 25 13 12 18 13 3 3 13 13 41 -0.13 -172 0 0 13 36 14 10 8 55.5 0 245 -73 13 32 18 13 40 11 13 30 56 13 41 34 0.05 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6861-01966-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 27 50.5632 DE: -24 35 56.908 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 27 50.5631 DE: -24 35 56.908 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.4 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2591) Dworetsky asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.86920 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 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): 0.014", 0.001", 86.729° remarks: * orbital elements for (2591)Dworetsky : Mean anomaly = 28.6025651831 deg Arg. of pericenter = 269.5358467117 deg Long. of node = 356.0276496811 deg Inclination = 1.5402919977 deg Eccentricity = 0.0401310499 Semimajor axis = 2.9389662974 AU Perihelion dist = 2.8210224943 AU Mag: H = 11.62, G = 0.15 Epoch of elements : MJD 60594.41979620 TDT (2024 Oct 11.4198) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,0.55,2024,10,11,10.075117,-0.014901,0.177108,13.317823,1.113442,0.005641,0.000262,0.000000,0.000000 105.7224,-24.5848,25.53,-7.29,False TYC 6861-01966-1,18.46404537,-24.5991411,11.60,11.40,11.29,0.0,0,,18.48925111,-24.5847987,5.77,5.43,0,0,0 2591,Dworetsky,17.17,12.947,2.8692,0,0,2.993,3.41,,1.2,0 0,28.5204,2024,10,11,269.5358,356.0276,1.5403,0.04013,2.93897,2.82102,11.61,5.0,0.15 1.174,0.0137,0.0010,87,0.0011,Known errors,0.67,0,-1,-1 20241011_1966-1,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org