| 词条 | 2004 BX159 |
| 释义 |
| minorplanet = yes | name = {{mp|2004 BX|159}} | background = #D6D6D6 | image = | caption = | discovery_ref = [2] | discovered = 20 January 2004 {{nowrap|{{small|(discovery: first observation only)}}}} | discoverer = Paranal Obs. | discovery_site = Paranal Obs. | mpc_name = {{mp|2004 BX|159}} | alt_names = | named_after = | mp_category = main-belt [2]{{·}}{{small|(middle)}} | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 19.97 yr (7,293 days) |earliest_precovery_date = 14 July 1997 | aphelion = 2.8997 AU | perihelion = 2.1632 AU | semimajor = 2.5315 AU | eccentricity = 0.1455 | period = 4.03 yr (1,471 days) | mean_anomaly = 355.95° | mean_motion = {{Deg2DMS|0.2447|sup=ms}} / day | inclination = 4.0931° | asc_node = 159.75° | arg_peri = 153.29° | dimensions = 1.2 km {{small|(estimate)}}[6] 1.8 km {{small|(est. at 0.10)}}[7] | rotation = | albedo = | spectral_type = | abs_magnitude = 16.9 }} {{mp|2004 BX|159}}, is an asteroid from the central region of the asteroid belt, approximately 1.2 kilometers in diameter. It was first observed at Paranal Observatory in the Atacama desert of Chile on 20 January 2004.[2] {{mp|2004 BX|159}} missed the virtual impactor date of 29 August 2009.[10] The asteroid was removed from the Sentry Risk Table in April 2014[11] as a result of precovery images establishing it is a harmless main belt asteroid. Description{{mp|2004 BX|159}} orbits the Sun in the central main-belt at a distance of 2.2–2.9 AU once every 4.03 years (1,471 days). Its orbit has an eccentricity of 0.15 and an inclination of 4° with respect to the ecliptic.After discovery, it was thought to be a Mars-crossing asteroid because of its poorly known orbit, and was listed on the Sentry Risk Table as a possible impactor.[10] With an observation arc of 3 days and only 8 observations, perihelion was determined to be {{val|1.5|3}} astronomical units (AU).[14] Precovery observations in archival data of the Canada-France-Hawaii Telescope on Mauna Kea were identified in early 2014, resulting in a dramatic improvement of the orbital accuracy, sufficient to recognize the object as a regular main belt asteroid, not posing any danger to Earth.The body was subsequently linked by the Minor Planet Center with additional observations reported since 1997. It has now a well-established orbit, observed over decades, with the lowest possible uncertainty of 0. It is even known that {{mp|2004 BX|159}} passed {{convert|0.0036|AU|km mi|abbr=on}} from asteroid 3 Juno on 18 September 1961. References1. ^1 2 3 {{cite web |title = 2004 BX159 |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=2004+BX159 |accessdate = 3 August 2017}} [1][2][3][4][5][6]2. ^1 2 {{cite web |date=2007-02-18 |title=WayBack Machine archive from 18 Feb 2007 |publisher=Wayback Machine |url=http://neo.jpl.nasa.gov/risk/2004bx159.html |accessdate=2013-01-15 |archiveurl=https://web.archive.org/web/20070218092947/http://neo.jpl.nasa.gov/risk/2004bx159.html |deadurl=yes |archivedate=February 18, 2007 }} 3. ^1 {{cite web |date=2014-04-01 |origyear=computed on 2011-09-14 |title=Asteroid 2004 BX159 Impact Risk |publisher=Wayback Machine: NASA/JPL Near-Earth Object Program Office |url=http://neo.jpl.nasa.gov/risk/2004bx159.html |accessdate=2014-04-01 |deadurl=yes |archiveurl=https://web.archive.org/web/20140401144737/http://neo.jpl.nasa.gov/risk/2004bx159.html |archivedate=April 1, 2014 }} 4. ^1 {{cite web |title = Asteroid Size Estimator |publisher = CNEOS/JPL |url = https://cneos.jpl.nasa.gov/tools/ast_size_est.html |access-date= 2 August 2017}} 5. ^1 JPL solution 3 (solution date 2011-Sep-14) {{Cite web |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004BX159 |title=(2004 BX159) |access-date=8 March 2019 |archive-url=https://archive.is/3RvI |archive-date=13 December 2012 |dead-url=yes |df=dmy-all }} 6. ^1 Removed Objects {{Cite web |url=http://neo.jpl.nasa.gov/risk/removed.html |title=Near Earth Object Program |access-date=2 March 2018 |archive-url=https://web.archive.org/web/20140403151020/http://neo.jpl.nasa.gov/risk/removed.html |archive-date=3 April 2014 |dead-url=bot: unknown |df=dmy-all }} }} External links
4 : Main-belt asteroids|Minor planet object articles (unnumbered)|Asteroids removed from the Sentry Risk Table|Astronomical objects discovered in 2004 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。