IOTA/IOTA-ES occultation update for (1081) Reseda / TYC 6869-00900-1 event on 2024 Jul 23, 13:52 UT Visible from Summary ------- On 2024 Jul 23 UT, the 36.6697606469711 km diameter asteroid (1081) Reseda will occult a 10.2 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 5.84 mag to 16.00 mag (the magnitude of the asteroid) for at most 3.350 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 Jul 23, 13:42 - 2024 Jul 23, 14:01 * geocentric midpoint of event [JD]: 2460515.07783579 * magnitude of target star: 10.17 * magnitude drop [mag]: 5.84 * estimated maximum duration [s]: 3.350 * Moon: 94 % sunlit, 54° distance * Sun: 155° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 39 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.003", 91°) * approx speed of asteroid's shadow [km/s]: 11.0045 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6869-00900-1 by 1081 Reseda on 2024 Jul 23 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 45 0 0 16 15 49 14 1 14.6 1 120 20 16 28 6 16 3 32 16 31 35 16 0 4 .... 46 0 0 15 42 0 14 1 14.4 2 121 19 15 54 17 15 29 45 15 57 45 15 26 17 -0.12 47 0 0 15 8 17 14 1 13.9 3 121 18 15 20 32 14 56 2 15 24 1 14 52 35 -0.22 48 0 0 14 34 39 14 1 13.3 4 121 17 14 46 53 14 22 25 14 50 21 14 18 58 -0.26 49 0 0 14 1 8 14 1 12.4 5 121 16 14 13 21 13 48 56 14 16 49 13 45 29 -0.28 50 0 0 13 27 45 14 1 11.2 6 122 15 13 39 57 13 15 34 13 43 24 13 12 7 -0.29 51 0 0 12 54 31 14 1 9.9 7 122 14 13 6 42 12 42 21 13 10 9 12 38 54 -0.30 52 0 0 12 21 26 14 1 8.3 8 122 13 12 33 36 12 9 18 12 37 2 12 5 52 -0.31 53 0 0 11 48 33 14 1 6.5 9 122 12 12 0 41 11 36 25 12 4 7 11 33 0 -0.32 54 0 0 11 15 51 14 1 4.4 11 123 11 11 27 57 11 3 45 11 31 23 11 0 20 -0.32 55 0 0 10 43 21 14 1 2.1 12 123 10 10 55 27 10 31 17 10 58 52 10 27 52 -0.32 56 0 0 10 11 5 14 0 59.7 13 123 8 10 23 9 9 59 2 10 26 34 9 55 38 -0.33 57 0 0 9 39 4 14 0 56.9 14 123 7 9 51 6 9 27 2 9 54 30 9 23 38 -0.33 58 0 0 9 7 17 14 0 54.0 15 123 6 9 19 18 8 55 17 9 22 42 8 51 54 -0.33 59 0 0 8 35 47 14 0 50.9 16 124 5 8 47 46 8 23 49 8 51 10 8 20 26 -0.33 60 0 0 8 4 33 14 0 47.5 17 124 4 8 16 31 7 52 37 8 19 54 7 49 14 -0.33 61 0 0 7 33 37 14 0 43.9 18 124 3 7 45 33 7 21 42 7 48 55 7 18 20 -0.33 62 0 0 7 2 59 14 0 40.2 19 124 2 7 14 53 6 51 6 7 18 15 6 47 45 -0.34 63 0 0 6 32 40 14 0 36.2 20 124 1 6 44 33 6 20 49 6 47 54 6 17 28 -0.34 64 0 0 6 2 41 14 0 32.0 22 124 0 6 14 32 5 50 52 6 17 53 5 47 31 -0.34 65 0 0 5 33 2 14 0 27.6 23 125 -1 5 44 51 5 21 15 5 48 12 5 17 55 -0.34 66 0 0 5 3 44 14 0 23.1 24 125 -2 5 15 31 4 51 58 5 18 51 4 48 39 -0.34 67 0 0 4 34 48 14 0 18.3 25 125 -4 4 46 33 4 23 4 4 49 52 4 19 45 -0.34 68 0 0 4 6 13 14 0 13.4 26 125 -5 4 17 56 3 54 31 4 21 15 3 51 13 -0.34 69 0 0 3 38 1 14 0 8.2 27 125 -6 3 49 43 3 26 21 3 53 1 3 23 3 -0.34 70 0 0 3 10 13 14 0 2.9 28 125 -7 3 21 52 2 58 34 3 25 10 2 55 17 -0.34 71 0 0 2 42 48 13 59 57.5 29 125 -8 2 54 25 2 31 11 2 57 43 2 27 54 -0.34 72 0 0 2 15 47 13 59 51.8 30 126 -9 2 27 22 2 4 12 2 30 39 2 0 55 -0.34 73 0 0 1 49 10 13 59 46.0 31 126 -10 2 0 44 1 37 37 2 4 0 1 34 21 -0.34 74 0 0 1 22 58 13 59 40.0 32 126 -11 1 34 30 1 11 27 1 37 46 1 8 12 -0.34 75 0 0 0 57 12 13 59 33.9 33 126 -12 1 8 42 0 45 43 1 11 57 0 42 28 -0.34 76 0 0 0 31 51 13 59 27.6 34 126 -13 0 43 19 0 20 24 0 46 34 0 17 10 -0.34 77 0 0 0 6 56 13 59 21.2 35 126 -14 0 18 23 - 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2 32 50 - 2 7 10 - 2 36 1 -0.35 174 0 0 - 1 59 33 13 45 17.8 40 233 -64 - 1 48 17 - 2 10 49 - 1 45 5 - 2 14 0 -0.35 175 0 0 - 1 37 3 13 45 10.8 39 233 -63 - 1 25 44 - 1 48 20 - 1 22 32 - 1 51 32 -0.35 176 0 0 - 1 14 4 13 45 3.9 38 234 -63 - 1 2 44 - 1 25 24 - 0 59 32 - 1 28 36 -0.35 177 0 0 - 0 50 39 13 44 57.2 37 234 -62 - 0 39 17 - 1 2 0 - 0 36 4 - 1 5 13 -0.35 178 0 0 - 0 26 46 13 44 50.6 36 234 -61 - 0 15 22 - 0 38 9 - 0 12 9 - 0 41 22 -0.35 179 0 0 - 0 2 27 13 44 44.2 34 234 -60 0 8 59 - 0 13 52 0 12 13 - 0 17 5 -0.35 180 0 0 0 22 19 13 44 37.9 33 234 -59 0 33 47 0 10 52 0 37 1 0 7 38 -0.35 -179 0 0 0 47 31 13 44 31.7 32 234 -58 0 59 1 0 36 3 1 2 16 0 32 48 -0.35 -178 0 0 1 13 9 13 44 25.7 31 235 -57 1 24 41 1 1 39 1 27 56 0 58 24 -0.35 -177 0 0 1 39 13 13 44 19.9 30 235 -56 1 50 46 1 27 40 1 54 2 1 24 25 -0.35 -176 0 0 2 5 41 13 44 14.2 29 235 -55 2 17 16 1 54 7 2 20 33 1 50 51 -0.35 -175 0 0 2 32 35 13 44 8.7 28 235 -53 2 44 12 2 20 59 2 47 29 2 17 42 -0.35 -174 0 0 2 59 52 13 44 3.4 27 235 -52 3 11 31 2 48 14 3 14 49 2 44 57 -0.35 -173 0 0 3 27 34 13 43 58.2 26 235 -51 3 39 14 3 15 54 3 42 33 3 12 36 -0.35 -172 0 0 3 55 38 13 43 53.3 25 235 -50 4 7 21 3 43 57 4 10 40 3 40 39 -0.35 -171 0 0 4 24 6 13 43 48.5 24 236 -49 4 35 51 4 12 23 4 39 10 4 9 4 -0.35 -170 0 0 4 52 56 13 43 43.8 23 236 -48 5 4 42 4 41 11 5 8 2 4 37 51 -0.35 -169 0 0 5 22 8 13 43 39.4 22 236 -47 5 33 56 5 10 21 5 37 16 5 7 1 -0.35 -168 0 0 5 51 41 13 43 35.2 21 236 -46 6 3 31 5 39 52 6 6 52 5 36 32 -0.35 -167 0 0 6 21 34 13 43 31.2 20 236 -45 6 33 26 6 9 44 6 36 48 6 6 23 -0.35 -166 0 0 6 51 48 13 43 27.3 19 236 -44 7 3 41 6 39 55 7 7 3 6 36 34 -0.35 -165 0 0 7 22 21 13 43 23.7 17 236 -43 7 34 16 7 10 26 7 37 38 7 7 4 -0.36 -164 0 0 7 53 12 13 43 20.3 16 237 -42 8 5 9 7 41 16 8 8 32 7 37 54 -0.36 -163 0 0 8 24 21 13 43 17.1 15 237 -41 8 36 20 8 12 23 8 39 43 8 9 1 -0.36 -162 0 0 8 55 47 13 43 14.1 14 237 -40 9 7 48 8 43 48 9 11 12 8 40 25 -0.36 -161 0 0 9 27 30 13 43 11.3 13 237 -38 9 39 32 9 15 29 9 42 56 9 12 5 -0.36 -160 0 0 9 59 28 13 43 8.8 12 237 -37 10 11 32 9 47 26 10 14 56 9 44 1 -0.36 -159 0 0 10 31 41 13 43 6.4 11 238 -36 10 43 46 10 19 37 10 47 11 10 16 12 -0.36 -158 0 0 11 4 8 13 43 4.3 10 238 -35 11 16 14 10 52 2 11 19 40 10 48 37 -0.36 -157 0 0 11 36 47 13 43 2.4 9 238 -34 11 48 55 11 24 40 11 52 21 11 21 15 -0.36 -156 0 0 12 9 39 13 43 0.8 8 238 -33 12 21 48 11 57 31 12 25 15 11 54 5 -0.36 -155 0 0 12 42 42 13 42 59.3 6 238 -32 12 54 52 12 30 32 12 58 19 12 27 6 -0.36 -154 0 0 13 15 55 13 42 58.1 5 239 -31 13 28 7 13 3 44 13 31 34 13 0 17 -0.36 -153 0 0 13 49 17 13 42 57.2 4 239 -30 14 1 30 13 37 5 14 4 58 13 33 38 -0.36 -152 0 0 14 22 47 13 42 56.4 3 239 -28 14 35 2 14 10 34 14 38 29 14 7 7 -0.36 -151 0 0 14 56 25 13 42 55.9 2 239 -27 15 8 40 14 44 11 15 12 8 14 40 43 -0.37 -150 0 0 15 30 9 13 42 55.6 1 240 -26 15 42 25 15 17 53 15 45 54 15 14 26 -0.38 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6869-00900-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 27 31.2754 DE: -28 58 21.307 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 27 31.2754 DE: -28 58 21.307 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.2 * B mag [mag]: 10.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1081) Reseda asteroid class: approx. diameter [km]: 37 approx. diameter ["]: 0.022 distance from Earth [AU]: 2.29210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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): 0.022", 0.003", 91.421° remarks: * orbital elements for (1081)Reseda : Mean anomaly = 259.8965551240 deg Arg. of pericenter = 9.5258072822 deg Long. of node = 30.2903063155 deg Inclination = 4.1885637901 deg Eccentricity = 0.1487622838 Semimajor axis = 3.0952559864 AU Perihelion dist = 2.6347986369 AU Mag: H = 11.10, G = 0.15 Epoch of elements : MJD 60514.57783646 TDT (2024 Jul 23.5778) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,3.35,2024,7,23,13.868059,0.002028,0.317140,-6.211125,0.037508,0.002316,0.000626,0.000001,0.000000 127.4608,-28.9582,-26.38,19.89,False TYC 6869-00900-1,18.45868763,-28.9725851,10.80,10.17,9.83,0.1,0,,18.48503566,-28.9581625,5.84,5.73,0,0,0 1081,Reseda,16.00,36.836,2.2921,0,0,-1.815,0.14,,2.2,0 0,259.7920,2024,7,23,9.5258,30.2903,4.1886,0.14876,3.09526,2.63480,11.10,5.0,0.15 1.141,0.0223,0.0031,91,0.0031,Known errors,1.08,0,-1,-1 20240723_0900-1,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org