| 词条 | 1093 Freda |
| 释义 |
| minorplanet = yes | name = 1093 Freda | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discoverer = B. Jekhovsky | discovery_site = Algiers Obs. | discovered = 15 June 1925 | mpc_name = (1093) Freda | alt_names = 1925 LA{{·}}A898 VE | pronounced = | named_after = Fred Prévost {{small|(French engineer)}}[2] | mp_category = main-belt{{·}}{{small|(outer)}} [3] | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 88.15 yr (32,198 days) | aphelion = 3.9776 AU | perihelion = 2.2809 AU | semimajor = 3.1293 AU | eccentricity = 0.2711 | period = 5.54 yr (2,022 days) | mean_anomaly = 175.72° | mean_motion = {{Deg2DMS|0.1781|sup=ms}} / day | inclination = 25.215° | asc_node = 55.635° | arg_peri = 251.42° | dimensions = {{val|88.01|27.85}} km[5] {{val|101.67|1.45}} km[6] {{val|116.73|2.9}} km[7] {{val|126.04|43.76}} km[8] | rotation = {{val|10.73|0.05}} h[9] {{val|10.73|0.05}} h[9] {{val|19.67|0.01}} h[11]{{efn|name=lightcurve-plot-Warner}} {{val|19.701|0.0148}} h[12] | albedo = {{val|0.03|0.02}}[8] {{val|0.0381|0.002}}[7] {{val|0.051|0.002}}[6] {{val|0.06|0.05}}[5] | spectral_type = Tholen {{=}} C [3] B–V {{=}} 0.679 U–B {{=}} 0.356 | abs_magnitude = {{val|8.49|0.42}}[21]{{·}}8.83[3][6][7][8]{{·}}8.88[5]{{·}}{{val|8.882|0.001}} {{small|(R)}}[12] }}1093 Freda, provisional designation {{mp|1925 LA}}, is a carbonaceous asteroid from the outer regions of the asteroid belt's background population, approximately 110 kilometers in diameter. It was discovered on 15 June 1925, by astronomer Benjamin Jekhowsky at the Algiers Observatory in Algeria, North Africa.[29] The asteroid was named after French engineer Fred Prévost.[2] Orbit and classificationFreda is a non-family asteroid of the main belt's background population. It orbits the Sun in the outer main-belt at a distance of 2.3–4.0 AU once every 5 years and 6 months (2,022 days). Its orbit has an eccentricity of 0.27 and an inclination of 25° with respect to the ecliptic.In November 1998, the asteroid was first identified as {{mp|A898 VE}} at the Boyden Station of the Harvard Observatory in Peru. The body's observation arc begins at Yerkes Observatory in February 1929, almost four years after its official discovery observation at Algiers.[29] Physical characteristicsIn the Tholen classification, Freda is a common carbonaceous C-type asteroid.[3] Rotation periodSeveral rotational lightcurves of Freda were obtained from photometric observations by Brian Warner, Federico Manzini, and at the Palomar Transient Factory since 2007.[9][11][12] Best-rated lightcurve analysis gave a rotation period of 19.67 hours with a brightness amplitude of 0.21 magnitude ({{small|U=3}}).[11]{{efn|name=lightcurve-plot-Warner}} Diameter and albedoAccording to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Freda measures between 88.01 and 126.04 kilometers in diameter and its surface has an albedo between 0.03 and 0.06.[5][6][7][8] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0381 and a diameter of 116.73 kilometers based on an absolute magnitude of 8.83.[3] NamingThis minor planet was named after Fred Prévost, a French civil engineer of mines and benefactor of the Faculty of sciences of Bordeaux. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 103}}).[2] Notes{{notelist|refs={{efn|name=lightcurve-plot-Warner|1=Lightcurve plot of 1093 Freda, Palmer Divide Observatory, Brian D. Warner (2008). Summary figures for (1093) Freda at the LCDB}}}} References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1093) Freda |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 93 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1094 |chapter = (1093) Freda }} [1][2][3][4][5][6][7][8][9][10][11]2. ^1 2 {{cite web |title = 1093 Freda (1925 LA) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1093 |accessdate = 25 September 2017}} 3. ^1 2 3 {{cite web |title = Asteroids and comets rotation curves – (1093) Freda |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page3cou.html#001093 |accessdate = 25 September 2017}} 4. ^1 2 3 4 5 {{cite web |title = LCDB Data for (1093) Freda |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1093%7CFreda |accessdate = 25 September 2017}} 5. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = C. R. |last1 = Nugent |first2 = A. |last2 = Mainzer |first3 = J. |last3 = Masiero |first4 = J. |last4 = Bauer |first5 = R. M. |last5 = Cutri |first6 = T. |last6 = Grav |first7 = E. |last7 = Kramer |first8 = S. |last8 = Sonnett |first9 = R. |last9 = Stevenson |first10 = E. L. |last10 = Wright |date = December 2015 |title = NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N |journal = The Astrophysical Journal |volume = 814 |issue = 2 |page = 13 |bibcode = 2015ApJ...814..117N |doi = 10.1088/0004-637X/814/2/117 |arxiv = 1509.02522 |access-date= 25 September 2017}} 6. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = C. R. |last1 = Nugent |first2 = A. |last2 = Mainzer |first3 = J. |last3 = Bauer |first4 = R. M. |last4 = Cutri |first5 = E. A. |last5 = Kramer |first6 = T. |last6 = Grav |first7 = J. |last7 = Masiero |first8 = S. |last8 = Sonnett |first9 = E. 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D. |last4 = Price |date = October 2004 |title = IRAS Minor Planet Survey V6.0 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2004PDSS...12.....T |journal = NASA Planetary Data System |volume = 12 |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |access-date= 25 September 2017}} 9. ^1 2 3 {{Cite journal |author = Warner, Brian D. |date = October 2008 |title = Asteroid Lightcurve Analysis at the Palmer Divide Observatory: February-May 2008 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..163W |journal = The Minor Planet Bulletin |volume = 35 |issue = 4 |pages = 163–166 |issn = 1052-8091 |bibcode = 2008MPBu...35..163W |access-date= 25 September 2017}} 10. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Adam |last1 = Waszczak |first2 = Chan-Kao |last2 = Chang |first3 = Eran O. |last3 = Ofek |first4 = Russ |last4 = Laher |first5 = Frank |last5 = Masci |first6 = David |last6 = Levitan |first7 = Jason |last7 = Surace |first8 = Yu-Chi |last8 = Cheng |first9 = Wing-Huen |last9 = Ip |first10 = Daisuke |last10 = Kinoshita |first11 = George |last11 = Helou |first12 = Thomas A. |last12 = Prince |first13 = Shrinivas |last13 = Kulkarni |date = September 2015 |title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W |journal = The Astronomical Journal |volume = 150 |issue = 3 |page = 35 |bibcode = 2015AJ....150...75W |doi = 10.1088/0004-6256/150/3/75 |arxiv = 1504.04041 |access-date= 25 September 2017}} 11. ^1 {{cite journal |display-authors = 6 |first1 = Peter |last1 = Veres |first2 = Robert |last2 = Jedicke |first3 = Alan |last3 = Fitzsimmons |first4 = Larry |last4 = Denneau |first5 = Mikael |last5 = Granvik |first6 = Bryce |last6 = Bolin |first7 = Serge |last7 = Chastel |first8 = Richard J. |last8 = Wainscoat |first9 = William S. |last9 = Burgett |first10 = Kenneth C. |last10 = Chambers |first11 = Heather |last11 = Flewelling |first12 = Nick |last12 = Kaiser |first13 = Eugen A. |last13 = Magnier |first14 = Jeff S. |last14 = Morgan |first15 = Paul A. |last15 = Price |first16 = John L. |last16 = Tonry |first17 = Christopher |last17 = Waters |date = November 2015 |title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 |access-date= 25 September 2017}} }} External links
6 : Background asteroids|Discoveries by Benjamin Jekhowsky|Minor planets named for people|Named minor planets|C-type asteroids (Tholen)|Astronomical objects discovered in 1925 |
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