IOTA/IOTA-ES occultation update for 2005 VZ122 / UCAC4 517-025273 event on 2023 Nov 21, 14:57 UT Visible from Summary ------- On 2023 Nov 21 UT, the 115.9 km diameter asteroid 2005 VZ122 will occult a 13.9 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.06 mag to 22.96 mag (the magnitude of the asteroid) for at most 6.010 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]: 2460270.12495329 * magnitude of target star: 13.90 * magnitude drop [mag]: 9.06 * estimated maximum duration [s]: 6.010 * Moon: 64 % sunlit, 110° distance * Sun: 141° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 116 * 1 sigma uncertainty interval [path widths]: +/- 108.97 * 1 sigma uncertainty interval [seconds]: +/- 1000.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.769, +/- 0.464) * 1 sigma uncertainty ellipse (major, minor, PA): (0.776", 0.452", 100°) * approx speed of asteroid's shadow [km/s]: 19.2943 * website for maps: http://www.asteroidoccultation.com Path Coordinates: No Lat/Long file for this path. Data for the target star ------------------------ * name: UCAC4 517-025273 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 25 38.4727 DE: +13 18 36.304 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 25 38.4727 DE: +13 18 36.304 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 13.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: 2005 VZ122 asteroid class: TNO asteroid system: multiple bodies approx. diameter [km]: 116 approx. diameter ["]: 0.005 distance from Earth [AU]: 35.36380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#9 date of fit: 2021 Dec 14 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): 0.776", 0.452", 99.602° remarks: * orbital elements for 2005 VZ122 : Mean anomaly = 37.8280038789 deg Arg. of pericenter = 180.7691368303 deg Long. of node = 221.7992068833 deg Inclination = 12.0831120791 deg Eccentricity = 0.1840686648 Semimajor axis = 41.5092420902 AU Perihelion dist = 33.8686913223 AU Mag: H = 7.28, G = 0.15 Epoch of elements : MJD 60269.62347222 TDT (2023 Nov 21.6235) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#92021Dec14,6.01,2023,11,21,14.998879,0.246048,-1.634828,-10.769125,-1.619764,-0.003691,0.001029,0.000001,0.000000 171.4120,13.2976,-48.52,-19.94,False UCAC4 517-025273,6.42735354,13.3100845,0.00,13.90,0.00,0.0,0,,6.45001749,13.2975988,9.06,0.00,0,0,0 0,2005 VZ122,22.96,115.9,35.3638,0,0,-0.183,-0.40,,11.6 ,49,2300,30.000000,,,,,, 0,37.8257,2023,11,21,180.7691,221.7992,12.0831,0.18407,41.50924,33.86869,7.28,5.0,0.15 109.967,0.7757,0.4517,100,0.4924,Known errors,-1.00,-1,-1,-1 20231121_025273,59745.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Jun 15, 05:24 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org