IOTA/IOTA-ES occultation update for (795) Fini / TYC 7981-00898-1 event on 2023 Aug 28, 01:39 UT Visible from Africa, South America Summary ------- On 2023 Aug 28 UT, the 78.4 km diameter asteroid (795) Fini will occult a 11.2 mag star in the constellation Grus for observers along a path across Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.10 mag to 14.26 mag (the magnitude of the asteroid) for at most 6.260 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: 94 * date and approx. time of event: 2023 Aug 28, 01:31 - 2023 Aug 28, 01:47 * geocentric midpoint of event [JD]: 2460184.56900433 * magnitude of target star: 11.22 * magnitude drop [mag]: 3.10 * estimated maximum duration [s]: 6.260 * Moon: 86 % sunlit, 31° distance * Sun: 150° distance * rough path description: Africa, South America Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 83 * 1 sigma uncertainty interval [path widths]: +/- 0.45 * 1 sigma uncertainty interval [seconds]: +/- 3.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.030, +/- 0.023) * 1 sigma uncertainty ellipse (major, minor, PA): (0.032", 0.020", 60°) * approx speed of asteroid's shadow [km/s]: 12.5213 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7981-00898-1 by 795 Fini on 2023 Aug 28 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 -106 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 22 26 1 .... -105 0 0 22 33 54 1 47 20.4 1 133 -7 23 4 49 22 3 8 23 32 56 21 35 23 .... -104 0 0 21 43 4 1 47 20.1 2 133 -8 22 13 56 21 12 21 22 42 0 20 44 39 -0.17 -103 0 0 20 52 9 1 47 19.6 3 133 -9 21 22 57 20 21 29 21 50 58 19 53 51 -0.25 -102 0 0 20 1 11 1 47 18.8 5 134 -10 20 31 55 19 30 35 20 59 52 19 3 0 -0.29 -101 0 0 19 10 12 1 47 17.7 6 134 -11 19 40 52 18 39 41 20 8 45 18 12 10 -0.31 -100 0 0 18 19 16 1 47 16.4 7 134 -12 18 49 51 17 48 50 19 17 39 17 21 23 -0.32 - 99 0 0 17 28 24 1 47 14.8 8 135 -13 17 58 53 16 58 3 18 26 37 16 30 41 -0.33 - 98 0 0 16 37 39 1 47 12.9 10 135 -14 17 8 2 16 7 23 17 35 41 15 40 6 -0.34 - 97 0 0 15 47 3 1 47 10.8 11 135 -16 16 17 20 15 16 53 16 44 53 14 49 42 -0.35 - 96 0 0 14 56 38 1 47 8.4 12 136 -17 15 26 49 14 26 35 15 54 16 13 59 29 -0.35 - 95 0 0 14 6 27 1 47 5.8 13 136 -18 14 36 32 13 36 30 15 3 52 13 9 30 -0.35 - 94 0 0 13 16 32 1 47 2.9 15 136 -19 13 46 29 12 46 42 14 13 43 12 19 48 -0.36 - 93 0 0 12 26 54 1 46 59.7 16 136 -20 12 56 44 11 57 11 13 23 52 11 30 24 -0.36 - 92 0 0 11 37 36 1 46 56.3 17 137 -21 12 7 19 11 8 1 12 34 19 10 41 20 -0.36 - 91 0 0 10 48 40 1 46 52.7 18 137 -22 11 18 15 10 19 12 11 45 8 9 52 39 -0.36 - 90 0 0 10 0 7 1 46 48.8 20 137 -24 10 29 34 9 30 48 10 56 20 9 4 21 -0.36 - 89 0 0 9 12 0 1 46 44.7 21 137 -25 9 41 19 8 42 48 10 7 57 8 16 29 -0.37 - 88 0 0 8 24 19 1 46 40.3 22 137 -26 8 53 30 7 55 16 9 20 1 7 29 4 -0.37 - 87 0 0 7 37 8 1 46 35.8 23 138 -27 8 6 9 7 8 13 8 32 33 6 42 8 -0.37 - 86 0 0 6 50 26 1 46 31.0 25 138 -28 7 19 19 6 21 40 7 45 35 5 55 43 -0.37 - 85 0 0 6 4 16 1 46 26.0 26 138 -29 6 33 0 5 35 38 6 59 8 5 9 49 -0.37 - 84 0 0 5 18 38 1 46 20.8 27 138 -30 5 47 14 4 50 9 6 13 13 4 24 28 -0.37 - 83 0 0 4 33 35 1 46 15.4 28 139 -32 5 2 2 4 5 14 5 27 53 3 39 41 -0.37 - 82 0 0 3 49 6 1 46 9.8 29 139 -33 4 17 24 3 20 55 4 43 8 2 55 29 -0.37 - 81 0 0 3 5 14 1 46 4.1 31 139 -34 3 33 24 2 37 12 3 58 59 2 11 54 -0.37 - 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4 57 53 - 5 50 18 - 4 34 2 - 6 13 55 -0.37 - 67 0 0 - 5 58 20 1 44 28.3 46 142 -49 - 5 32 13 - 6 24 22 - 5 8 30 - 6 47 52 -0.37 - 66 0 0 - 6 31 49 1 44 20.7 47 143 -50 - 6 5 50 - 6 57 42 - 5 42 14 - 7 21 5 -0.37 - 65 0 0 - 7 4 33 1 44 13.0 48 143 -51 - 6 38 42 - 7 30 19 - 6 15 13 - 7 53 34 -0.37 - 64 0 0 - 7 36 33 1 44 5.2 49 144 -52 - 7 10 50 - 8 2 11 - 6 47 28 - 8 25 19 -0.37 - 63 0 0 - 8 7 48 1 43 57.3 50 144 -53 - 7 42 13 - 8 33 19 - 7 18 59 - 8 56 20 -0.37 - 62 0 0 - 8 38 20 1 43 49.4 51 144 -54 - 8 12 52 - 9 3 43 - 7 49 45 - 9 26 38 -0.37 - 61 0 0 - 9 8 7 1 43 41.4 52 145 -55 - 8 42 47 - 9 33 23 - 8 19 46 - 9 56 11 -0.37 - 60 0 0 - 9 37 10 1 43 33.4 53 145 -56 - 9 11 57 -10 2 19 - 8 49 4 -10 25 1 -0.37 - 59 0 0 -10 5 30 1 43 25.3 54 146 -57 - 9 40 24 -10 30 31 - 9 17 36 -10 53 6 -0.37 - 58 0 0 -10 33 5 1 43 17.1 55 147 -58 -10 8 6 -10 57 59 - 9 45 25 -11 20 29 -0.37 - 57 0 0 -10 59 56 1 43 9.0 56 147 -59 -10 35 4 -11 24 44 -10 12 30 -11 47 7 -0.37 - 56 0 0 -11 26 4 1 43 0.8 57 148 -60 -11 1 19 -11 50 45 -10 38 50 -12 13 2 -0.37 - 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7 0 0 -19 0 18 1 36 21.8 60 223 -71 -18 37 31 -19 23 1 -18 16 51 -19 43 32 -0.37 - 6 0 0 -18 53 33 1 36 14.2 60 224 -71 -18 30 45 -19 16 18 -18 10 3 -19 36 51 -0.37 - 5 0 0 -18 46 11 1 36 6.7 59 225 -70 -18 23 20 -19 8 58 -18 2 37 -19 29 33 -0.37 - 4 0 0 -18 38 9 1 35 59.2 58 225 -69 -18 15 17 -19 0 58 -17 54 31 -19 21 35 -0.37 - 3 0 0 -18 29 29 1 35 51.7 58 226 -68 -18 6 34 -18 52 21 -17 45 46 -19 13 0 -0.37 - 2 0 0 -18 20 10 1 35 44.3 57 226 -67 -17 57 12 -18 43 4 -17 36 22 -19 3 45 -0.37 - 1 0 0 -18 10 12 1 35 36.9 56 227 -67 -17 47 11 -18 33 9 -17 26 18 -18 53 52 -0.37 - 0 0 0 -17 59 34 1 35 29.6 55 227 -66 -17 36 31 -18 22 34 -17 15 35 -18 43 20 -0.37 1 0 0 -17 48 17 1 35 22.3 54 228 -65 -17 25 10 -18 11 20 -17 4 12 -18 32 9 -0.37 2 0 0 -17 36 20 1 35 15.1 54 228 -64 -17 13 10 -17 59 26 -16 52 9 -18 20 19 -0.37 3 0 0 -17 23 43 1 35 7.9 53 228 -63 -17 0 30 -17 46 53 -16 39 25 -18 7 48 -0.37 4 0 0 -17 10 26 1 35 0.7 52 229 -62 -16 47 9 -17 33 40 -16 26 1 -17 54 38 -0.37 5 0 0 -16 56 29 1 34 53.6 51 229 -62 -16 33 8 -17 19 46 -16 11 56 -17 40 48 -0.37 6 0 0 -16 41 51 1 34 46.6 50 229 -61 -16 18 26 -17 5 12 -15 57 10 -17 26 18 -0.37 7 0 0 -16 26 32 1 34 39.6 49 229 -60 -16 3 3 -16 49 57 -15 41 43 -17 11 7 -0.37 8 0 0 -16 10 32 1 34 32.7 48 230 -59 -15 46 58 -16 34 2 -15 25 35 -16 55 15 -0.37 9 0 0 -15 53 50 1 34 25.9 48 230 -58 -15 30 12 -16 17 25 -15 8 45 -16 38 42 -0.37 10 0 0 -15 36 27 1 34 19.1 47 230 -57 -15 12 44 -16 0 6 -14 51 13 -16 21 28 -0.37 11 0 0 -15 18 22 1 34 12.4 46 230 -56 -14 54 34 -15 42 6 -14 32 58 -16 3 32 -0.37 12 0 0 -14 59 35 1 34 5.7 45 230 -55 -14 35 42 -15 23 24 -14 14 1 -15 44 55 -0.37 13 0 0 -14 40 5 1 33 59.1 44 230 -54 -14 16 7 -15 4 0 -13 54 21 -15 25 35 -0.37 14 0 0 -14 19 53 1 33 52.6 43 230 -53 -13 55 49 -14 43 53 -13 33 58 -15 5 33 -0.37 15 0 0 -13 58 57 1 33 46.2 42 230 -53 -13 34 48 -14 23 3 -13 12 52 -14 44 48 -0.37 16 0 0 -13 37 19 1 33 39.8 41 230 -52 -13 13 3 -14 1 30 -12 51 2 -14 23 20 -0.37 17 0 0 -13 14 57 1 33 33.6 40 230 -51 -12 50 35 -13 39 14 -12 28 28 -14 1 9 -0.37 18 0 0 -12 51 50 1 33 27.4 39 231 -50 -12 27 23 -13 16 14 -12 5 10 -13 38 15 -0.38 19 0 0 -12 28 0 1 33 21.3 38 231 -49 -12 3 26 -12 52 30 -11 41 8 -13 14 37 -0.38 20 0 0 -12 3 26 1 33 15.3 37 231 -48 -11 38 45 -12 28 2 -11 16 21 -12 50 15 -0.38 21 0 0 -11 38 7 1 33 9.4 36 231 -47 -11 13 20 -12 2 50 -10 50 49 -12 25 8 -0.38 22 0 0 -11 12 3 1 33 3.6 35 231 -46 -10 47 9 -11 36 53 -10 24 32 -11 59 18 -0.38 23 0 0 -10 45 14 1 32 57.9 34 231 -45 -10 20 13 -11 10 11 - 9 57 30 -11 32 42 -0.38 24 0 0 -10 17 40 1 32 52.4 33 231 -44 - 9 52 32 -10 42 44 - 9 29 42 -11 5 22 -0.38 25 0 0 - 9 49 21 1 32 46.9 32 231 -43 - 9 24 5 -10 14 32 - 9 1 8 -10 37 16 -0.38 26 0 0 - 9 20 16 1 32 41.6 31 231 -42 - 8 54 53 - 9 45 35 - 8 31 49 -10 8 26 -0.38 27 0 0 - 8 50 25 1 32 36.4 30 231 -41 - 8 24 54 - 9 15 52 - 8 1 44 - 9 38 50 -0.38 28 0 0 - 8 19 49 1 32 31.3 29 231 -40 - 7 54 10 - 8 45 23 - 7 30 52 - 9 8 28 -0.38 29 0 0 - 7 48 27 1 32 26.3 28 231 -39 - 7 22 40 - 8 14 9 - 6 59 15 - 8 37 21 -0.38 30 0 0 - 7 16 18 1 32 21.5 27 230 -38 - 6 50 23 - 7 42 9 - 6 26 51 - 8 5 28 -0.38 31 0 0 - 6 43 24 1 32 16.9 26 230 -37 - 6 17 21 - 7 9 22 - 5 53 40 - 7 32 49 -0.38 32 0 0 - 6 9 44 1 32 12.4 25 230 -36 - 5 43 32 - 6 35 51 - 5 19 44 - 6 59 25 -0.38 33 0 0 - 5 35 17 1 32 8.0 23 230 -35 - 5 8 57 - 6 1 33 - 4 45 1 - 6 25 15 -0.38 34 0 0 - 5 0 5 1 32 3.9 22 230 -34 - 4 33 36 - 5 26 29 - 4 9 32 - 5 50 19 -0.38 35 0 0 - 4 24 7 1 31 59.8 21 230 -33 - 3 57 29 - 4 50 40 - 3 33 17 - 5 14 37 -0.38 36 0 0 - 3 47 24 1 31 56.0 20 230 -32 - 3 20 37 - 4 14 6 - 2 56 17 - 4 38 11 -0.39 37 0 0 - 3 9 55 1 31 52.4 19 230 -30 - 2 42 59 - 3 36 46 - 2 18 30 - 4 0 59 -0.39 38 0 0 - 2 31 41 1 31 48.9 18 230 -29 - 2 4 36 - 2 58 41 - 1 39 59 - 3 23 2 -0.39 39 0 0 - 1 52 42 1 31 45.6 16 230 -28 - 1 25 28 - 2 19 51 - 1 0 43 - 2 44 21 -0.39 40 0 0 - 1 12 59 1 31 42.5 15 230 -27 - 0 45 35 - 1 40 17 - 0 20 42 - 2 4 55 -0.39 41 0 0 - 0 32 33 1 31 39.7 14 230 -26 - 0 4 59 - 1 0 0 0 20 3 - 1 24 46 -0.39 42 0 0 0 8 38 1 31 37.0 13 230 -25 0 36 20 - 0 18 59 1 1 31 - 0 43 54 -0.39 43 0 0 0 50 30 1 31 34.6 12 230 -24 1 18 23 0 22 44 1 43 42 - 0 2 18 -0.39 44 0 0 1 33 5 1 31 32.4 11 230 -23 2 1 7 1 5 10 2 26 35 0 39 59 -0.39 45 0 0 2 16 21 1 31 30.4 9 231 -22 2 44 32 1 48 17 3 10 9 1 22 57 -0.39 46 0 0 3 0 18 1 31 28.6 8 231 -21 3 28 38 2 32 4 3 54 24 2 6 35 -0.39 47 0 0 3 44 53 1 31 27.1 7 231 -19 4 13 24 3 16 30 4 39 18 2 50 54 -0.39 48 0 0 4 30 8 1 31 25.8 6 231 -18 4 58 47 4 1 35 5 24 50 3 35 50 -0.40 49 0 0 5 15 59 1 31 24.8 4 231 -17 5 44 48 4 47 17 6 10 59 4 21 24 -0.40 50 0 0 6 2 26 1 31 24.0 3 231 -16 6 31 25 5 33 35 6 57 45 5 7 34 -0.40 51 0 0 6 49 29 1 31 23.5 2 231 -15 7 18 36 6 20 29 7 45 4 5 54 19 -0.41 52 0 0 7 37 4 1 31 23.3 1 231 -14 8 6 20 7 7 55 .. .. .. 6 41 38 -0.47 Uncertainty in time = +/- 4 secs Prediction of 2023 Aug 6.7 Data for the target star ------------------------ * name: TYC 7981-00898-1 * constellation : Grus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 49 02.6453 DE: -38 27 31.908 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 49 02.6453 DE: -38 27 31.908 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (795) Fini asteroid class: approx. diameter [km]: 78 approx. diameter ["]: 0.056 distance from Earth [AU]: 1.91390 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#78 date of fit: 2023 Jul 30 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): 0.032", 0.020", 60.316° remarks: * orbital elements for (795)Fini : Mean anomaly = 102.9366058913 deg Arg. of pericenter = 189.8790006884 deg Long. of node = 17.3583205736 deg Inclination = 19.0517036004 deg Eccentricity = 0.1015673046 Semimajor axis = 2.7484046806 AU Perihelion dist = 2.4692566253 AU Mag: H = 10.13, G = 0.15 Epoch of elements : MJD 60184.06888889 TDT (2023 Aug 28.0689) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#782023Jul30,6.26,2023,8,28,1.656104,0.058484,0.336514,-6.962977,1.210249,0.000865,0.002645,0.000001,0.000000 -33.2425,-38.3485,155.53,9.85,False TYC 7981-00898-1,21.81740147,-38.4588631,0.00,11.22,0.00,0.0,0,,21.84176192,-38.3484853,3.10,0.00,0,0,0 795,Fini,14.26,78.400,1.9139,0,0,-2.718,5.57,,3.8,0 0,102.7054,2023,8,27,189.8790,17.3583,19.0517,0.10157,2.74840,2.46926,9.93,5.0,0.15 1.453,0.0323,0.0197,60,0.0378,Known errors,-1.00,0,-1,-1 20230828_0898-1,60162.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 06, 16:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org