| 词条 | (416151) 2002 RQ25 |
| 释义 |
| minorplanet = yes | name = (416151) {{mp|2002 RQ|25}} | background = #FFC2E0 | image = | image_size = | caption = | discovery_ref = | discovered = 3 September 2002 | discoverer = CINEOS | discovery_site = Campo Imperatore Obs. | mpc_name = (416151) {{mp|2002 RQ|25}} | alt_names = {{mp|2002 RQ|25}} | named_after = | mp_category = {{nowrap|Apollo{{·}}NEO {{·}}PHA [3]}} | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 14.13 yr (5,160 days) | aphelion = 1.4523 AU | perihelion = 0.7711 AU | semimajor = 1.1117 AU | eccentricity = 0.3064 | period = 1.17 yr (428 days) | mean_anomaly = 8.4222° | mean_motion = {{Deg2DMS|0.8408|sup=ms}} / day | inclination = 4.5766° | asc_node = 10.520° | arg_peri = 225.68° | moid = 0.0499 AU{{·}}19.4 LD | dimensions = 0.225 km {{small|(calculated)}}[5] | rotation = {{val|12.191|0.005}} h[6] | albedo = 0.20 {{small|(assumed)}}[5] | spectral_type = C [5]{{·}}C/X [9] | abs_magnitude = 20.6[5] }}{{mp|(416151) 2002 RQ|25}} is a carbonaceous asteroid of the Apollo group, classified as near-Earth object and potentially hazardous asteroid, approximately 0.2 kilometers in diameter. It was discovered on 3 September 2002, by the Campo Imperatore Near-Earth Object Survey (CINEOS) at the Italian Campo Imperatore Observatory, located in the Abruzzo region, east of Rome.[3] Orbit and classification{{mp|2002 RQ|25}} orbits the Sun at a distance of 0.8–1.5 AU once every 1 years and 2 months (428 days). Its orbit has an eccentricity of 0.31 and an inclination of 5° with respect to the ecliptic.The asteroid's minimum orbit intersection distance with Earth is {{convert |0.0499 |AU |km |abbr=on |sigfig=3}}, which is currently exactly at the threshold limit of 0.05 AU (or about 19.5 lunar distances) to make it a potentially hazardous object. Physical characteristicsThe carbonaceous C-type asteroid is also classified as a C/X-type body according to the survey carried out by NASA's Spitzer Space Telescope.[9] LightcurveA rotational lightcurve of {{mp|2002 RQ|25}} was obtained from photometric observations made by American astronomer Brian Warner at his Palmer Divide Observatory, Colorado, in February 2015. The ambiguous lightcurve rendered a rotation period of {{val|12.191|0.005}} hours with a brightness variation of 0.72 magnitude ({{small|U=2+}}), while a second solution gave 6.096 hours (or half of the first period) with an amplitude of 0.43.[6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates diameter of 225 meters with an absolute magnitude of 20.6.[5] NamingAs of 2017, this minor planet remains unnamed.[3] References1. ^1 2 3 {{cite web |title = 416151 (2002 RQ25) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=416151 |accessdate = 11 April 2016}} [1][2][3][4]2. ^1 2 3 4 5 {{cite web |title = LCDB Data for (416151) |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=416151%7C |accessdate = 11 April 2016}} 3. ^1 2 {{cite journal |author = Warner, Brian D. |date = July 2015 |title = Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 January - March |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42..172W |journal = The Minor Planet Bulletin |volume = 42 |issue = 3 |pages = 172–183 |issn = 1052-8091 |bibcode = 2015MPBu...42..172W |access-date= 11 April 2016}} 4. ^1 2 {{cite journal |first1 = Cristina A. |last1 = Thomas |first2 = Joshua P. |last2 = Emery |first3 = David E. |last3 = Trilling |first4 = Marco |last4 = Delbó |first5 = Joseph L. |last5 = Hora |first6 = Michael |last6 = Mueller |date = January 2014 |title = Physical characterization of Warm Spitzer-observed near-Earth objects |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014Icar..228..217T |journal = Icarus |volume = 228 |pages = 217–246 |bibcode = 2014Icar..228..217T |doi = 10.1016/j.icarus.2013.10.004 |arxiv = 1310.2000 |access-date= 11 April 2016}} }} External links
5 : Apollo asteroids|Discoveries by CINEOS|Potentially hazardous asteroids|Near-Earth objects in 2015|Astronomical objects discovered in 2002 |
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