IOTA/IOTA-ES occultation update for (119069) 2001 KN77 / UCAC4 325-143214 event on 2023 Sep 28, 01:15 UT Visible from Summary ------- On 2023 Sep 28 UT, the 125.8 km diameter asteroid (119069) 2001 KN77 will occult a 13.6 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 8.76 mag to 22.37 mag (the magnitude of the asteroid) for at most 19.810 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: 0 * date and approx. time of event: predicted path center does not land on Earth. * geocentric midpoint of event [JD]: 2460215.26624412 * magnitude of target star: 13.61 * magnitude drop [mag]: 8.76 * estimated maximum duration [s]: 19.810 * Moon: 96 % sunlit, 68° distance * Sun: 90° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 126 * 1 sigma uncertainty interval [path widths]: +/- 163.64 * 1 sigma uncertainty interval [seconds]: +/- 20256.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 5.551, +/- 0.294) * 1 sigma uncertainty ellipse (major, minor, PA): (5.551", 0.293", 90°) * approx speed of asteroid's shadow [km/s]: 6.3494 * website for maps: http://www.asteroidoccultation.com Path Coordinates: No Lat/Long file for this path. Data for the target star ------------------------ * name: UCAC4 325-143214 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 16 25.7252 DE: -25 11 57.289 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 16 25.7252 DE: -25 11 57.289 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 13.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (119069) 2001 KN77 asteroid class: TNO approx. diameter [km]: 126 approx. diameter ["]: 0.005 distance from Earth [AU]: 31.93950 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#14 date of fit: 2021 Apr 13 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): 5.551", 0.293", 89.856° remarks: * orbital elements for (119069)2001 KN77 : Mean anomaly = 328.3059873326 deg Arg. of pericenter = 280.9443092886 deg Long. of node = 45.4738548121 deg Inclination = 2.3642804678 deg Eccentricity = 0.2422846852 Semimajor axis = 39.1342479045 AU Perihelion dist = 29.6526189694 AU Mag: H = 7.42, G = 0.15 Epoch of elements : MJD 60215.05270833 TDT (2023 Sep 28.0527) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#142021Apr13,19.81,2023,9,27,18.389859,0.566706,-3.614164,3.540712,0.554044,0.005958,0.000186,0.000000,0.000000 -7.6608,-25.1921,-98.10,-1.75,False UCAC4 325-143214,18.27381255,-25.1992469,0.00,13.61,0.00,0.0,0,,18.29806464,-25.1920655,8.76,0.00,0,0,1 119069,2001 KN77,22.37,125.8,31.9395,0,0,0.071,0.15,,12.4 0,328.3017,2023,9,27,280.9443,45.4739,2.3643,0.24228,39.13425,29.65262,7.10,5.0,0.15 164.641,5.5513,0.2933,90,0.8887,Known errors,-1.00,-1,-1,-1 20230927_143214,59745.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Jun 15, 04:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org