(741081) 2005 LW3

Binary near-Earth asteroid December 2022 yes (741081) 2005 LW 3 #FFC2E0 2005LW3 Goldstone radar Nov23.jpg Radar image of 2005 LW 3 and its satellite (below) by the Goldstone Solar System Radar on 23 November 2022 Siding Spring Survey Siding Spring Obs. 5 June 2005 (741081) 2005 LW 3 NEOApolloPHA 25 February 2023 (JD 2460000.5) 0 17.49 yr (6,389 days) 2.106 AU 0.771 AU 5 October 2022 1.439 AU 0.4638 1.73 yr (630.3 days) 81.385° 0.5711586 ms / day 6.021° 59.587° 288.663° 0.001397 AU km LD on 3.335 AU 400 m (primary) 3.6 h 0.02 21.8921.68 (741081) 2005 LW 3 is a binary near-Earth asteroid classified as a potentially hazardous object of the Apollo group. It was discovered on 5 June 2005 by the Siding Spring Survey at Siding Spring Observatory in Australia. It made a close approach of 2.97 LD e6km e6mi in from Earth on 23 November 2022, reaching a peak brightness of apparent magnitude 13 as it passed over the northern celestial hemisphere sky. It was extensively observed by astronomers worldwide during the close approach, and radar observations by NASA's Goldstone Solar System Radar in California discovered a 100 m ft-wide natural satellite orbiting the asteroid at a wide separation of 4 km mi. Physical characteristics Goldstone Solar System Radar observations in November 2022 resolved the shape of 2005 LW 3, revealing a body 400 m ft in diameter—larger than its previously expected diameter of 150 m ft. For an absolute magnitude of 21.9, this radar-measured diameter indicates that 2005 LW 3 has a very low geometric albedo of 0.02. These radar observations also determined a rotation period of 3.6 hours for 2005 LW 3. Satellite The satellite of 2005 LW 3 was discovered by a team of astronomersObservers credited for the discovery of the satellite include: S. P. Naidu, L. A. M. Benner, M. Brozovic, J. D. Giorgini, S. Horiuchi, I. Savill-Brown, J. Stevens, C. Phillips, P. Edwards, and E. Kruzins. using Goldstone Solar System Radar observations from 23–27 November 2022. The satellite appears elongated, with equatorial dimensions of 100 × 50 m ft. The satellite is widely separated from 2005 LW 3 (the primary body of the system) at a semi-major axis of about 4 km mi, which is around 17% of the primary's Hill radius (24 km mi or for an assumed primary density of 1.6 g/cm3). The satellite's discovery was announced in a Central Bureau Electronic Telegram on 10 December 2022. Notes References 2022-12-02 last obs. JPL Small-Body Database Browser: (2005 LW3) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3279432 Jet Propulsion Laboratory 10 December 2022 2005 LW3 https://www.minorplanetcenter.net/db_search/show_object?object_id=2005+LW3 Minor Planet Center 10 December 2022 MPEC 2005-L19 : 2005 LW3 https://minorplanetcenter.net/mpec/K05/K05L19.html Minor Planet Electronic Circular Minor Planet Center 6 June 2005 10 December 2022 CBET 5198: 2005 LW_3 http://www.cbat.eps.harvard.edu/iau/cbet/005100/CBET005198.txt Daniel W. E. Green Central Bureau Electronic Telegram Central Bureau for astronomical Telegrams 10 December 2022 10 December 2022 Goldstone Radar Observations Planning: 2005 LW3, 1998 SS49, and 2017 QL33 https://echo.jpl.nasa.gov/asteroids/2005LW3/2005LW3.2022.goldstone.planning.html Lance A. M. Benner echo.jpl.nasa.gov NASA 10 December 2022 10 December 2022 MPEC 2022-U222 : International Asteroid Warning Network (IAWN) Timing Campaign https://minorplanetcenter.net/mpec/K22/K22UM2.html Minor Planet Electronic Circular Minor Planet Center 24 October 2022 10 December 2022 2005 LW3 http://www.johnstonsarchive.net/astro/astmoons/am2005lw3.html Wm. Robert Johnston Johnston's Archive 1 December 2022 10 December 2022 External links 2005 LW3: Timing Assessment, International Asteroid Warning Network, last updated 29 November 2022 Asteroid 2005 LW3 Campaign: Timing is Everything!, Leonard David, 5 November 2022 2005+LW3 2005LW3 3279432 741081 (741081) 2005 LW 3 Astronomy Outer Space Category:Apollo asteroids Category:Discoveries by SSS Category:Potentially hazardous asteroids Category:Binary asteroids 20221123 20050605 Category:Radar-imaged asteroids