IOTA/IOTA-ES occultation update for (795) Fini / TYC 7500-00826-1 event on 2023 Jun 17, 04:03 UT Visible from South America Summary ------- On 2023 Jun 17 UT, the 78.4 km diameter asteroid (795) Fini will occult a 11.5 mag star in the constellation Piscis Austrinus for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.34 mag to 14.82 mag (the magnitude of the asteroid) for at most 12.810 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 Jun 17, 03:47 - 2023 Jun 17, 04:18 * geocentric midpoint of event [JD]: 2460112.66870237 * magnitude of target star: 11.53 * magnitude drop [mag]: 3.34 * estimated maximum duration [s]: 12.810 * Moon: 1 % sunlit, 107° distance * Sun: 116° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 89 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.011) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.005", 45°) * approx speed of asteroid's shadow [km/s]: 6.1180 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7500-00826-1 by 795 Fini on 2023 Jun 17 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 - 62 0 0 15 6 56 3 47 35.9 0 125 -51 14 36 36 15 37 4 14 18 17 .. .. .. .... - 61 0 0 14 24 13 3 47 36.4 2 126 -52 13 53 30 14 54 45 13 34 57 15 12 59 0.46 - 60 0 0 13 39 52 3 47 37.3 3 126 -53 13 8 44 14 10 47 12 49 55 14 29 16 0.51 - 59 0 0 12 53 48 3 47 38.9 4 126 -54 12 22 14 13 25 9 12 3 9 13 43 52 0.53 - 58 0 0 12 5 58 3 47 41.0 5 126 -55 11 33 56 12 37 46 11 14 35 12 56 45 0.54 - 57 0 0 11 16 19 3 47 43.8 7 127 -55 10 43 49 11 48 35 10 24 10 12 7 51 0.55 - 56 0 0 10 24 47 3 47 47.2 8 127 -56 9 51 47 10 57 32 9 31 50 11 17 6 0.56 - 55 0 0 9 31 19 3 47 51.3 9 127 -57 8 57 47 10 4 35 8 37 30 10 24 27 0.56 - 54 0 0 8 35 50 3 47 56.2 11 127 -58 8 1 45 9 9 39 7 41 8 9 29 50 0.57 - 53 0 0 7 38 18 3 48 1.8 12 127 -59 7 3 37 8 12 41 6 42 39 8 33 12 0.57 - 52 0 0 6 38 36 3 48 8.3 13 127 -60 6 3 19 7 13 35 5 41 58 7 34 28 0.57 - 51 0 0 5 36 43 3 48 15.6 15 127 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Uncertainty in time = +/- 4 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 7500-00826-1 * constellation : Piscis Austrinus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 34 52.0043 DE: -34 03 26.049 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 34 52.0044 DE: -34 03 26.049 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (795) Fini asteroid class: approx. diameter [km]: 78 approx. diameter ["]: 0.050 distance from Earth [AU]: 2.16580 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#76 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): 0.015", 0.005", 44.659° remarks: * orbital elements for (795)Fini : Mean anomaly = 87.3721976429 deg Arg. of pericenter = 189.8844898073 deg Long. of node = 17.3580608318 deg Inclination = 19.0517447726 deg Eccentricity = 0.1016200131 Semimajor axis = 2.7484160612 AU Perihelion dist = 2.4691219850 AU Mag: H = 9.93, G = 0.15 Epoch of elements : MJD 60112.16875000 TDT (2023 Jun 17.1688) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#762023Apr24,12.81,2023,6,17,4.048857,-0.340602,-0.322688,2.375180,-2.506603,-0.004916,-0.001037,0.000000,0.000001 13.1583,-33.9342,119.48,23.37,False TYC 7500-00826-1,22.58111229,-34.0572360,0.00,11.53,0.00,0.0,0,,22.60330776,-33.9342170,3.34,0.00,0,0,0 795,Fini,14.82,78.4,2.1658,0,0,0.775,-10.18,,3.8,0 0,87.3357,2023,6,17,189.8845,17.3581,19.0517,0.10162,2.74842,2.46912,9.96,5.0,0.15 1.300,0.0150,0.0050,45,0.0150,Known errors,-1.00,-1,-1,-1 20230617_0826-1,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org