| 词条 | 1817 Katanga |
| 释义 |
| minorplanet = yes | name = 1817 Katanga | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discovered = 20 June 1939 | discoverer = C. Jackson | discovery_site = Johannesburg Obs. | mpc_name = (1817) Katanga | alt_names = 1939 MB{{·}}1928 KD 1950 NK{{·}}1971 BG | named_after = Katanga Province {{small|(Congo, Dem. Rep.)}}[2] | mp_category = main-belt{{·}}Phocaea [3] | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 77.58 yr (28,337 days) | aphelion = 2.8258 AU | perihelion = 1.9172 AU | semimajor = 2.3715 AU | eccentricity = 0.1916 | period = 3.65 yr (1,334 days) | mean_anomaly = 173.17° | mean_motion = {{Deg2DMS|0.2699|sup=ms}} / day | inclination = 25.709° | asc_node = 88.723° | arg_peri = 140.27° | dimensions = {{val|9.76|1.21}} km[5] {{val|15.89|1.56}} km[6] {{val|15.90|1.0}} km {{small|(IRAS:14)}}[7] 16.28 km {{small|(derived)}}[3] | rotation = {{val|6.35|0.02}} h[9] {{val|7.2165|0.0003}} h[10] {{val|8.481|0.003}} h[11] | albedo = {{nowrap|{{val|0.1331|0.018}} {{small|(IRAS:14)}}[7]}} 0.2421 {{small|(derived)}}[3] {{val|0.342|0.151}}[6] {{val|0.353|0.089}}[5] | spectral_type = S [3] | abs_magnitude = 10.78[6]{{·}}11.1[3]{{·}}11.80[5][7]{{·}} }}1817 Katanga, provisional designation {{mp|1939 MB}}, is a stony Phocaea asteroid in from the inner regions of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 20 June 1939, by English-born South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa.[22] It is named for the Katanga Province.[2] Orbit and classificationThe S-type asteroid is a member of the Phocaea family, a smaller population of asteroids with similar orbital characteristics named after their largest member, 25 Phocaea. Katanga orbits the Sun in the inner main-belt at a distance of 1.9–2.8 AU once every 3 years and 8 months (1,334 days). Its orbit has an eccentricity of 0.19 and an inclination of 26° with respect to the ecliptic. Katanga{{'}}s observation arc begins with its official discovery observation in 1939, as its first observation made at Heidelberg Observatory in 1928, remained unused ({{mp|1928 KD}}).[22] LightcurvesIn April 2008, a rotational lightcurve of Katanga was obtained from photometric observations by American astronomer Brian D. Warner at his Palmer Divide Observatory in Colorado. It gave a rotation period of 8.481 hours with a brightness variation of 0.30 magnitude ({{small|U=3}}).[11] The quality of this result supersedes two periods previously obtained by astronomers Stefano Sposetti and Glenn Malcolm in May and June 2001, respectively ({{small|U=2/2}}).[9][10] Diameter and albedoAccording to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Katanga measures between 9.76 and 15.90 kilometers in diameter, and its surface has an albedo between 0.133 and 0.353.[5][6][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.242 and a diameter of 16.28 kilometers with an absolute magnitude of 11.1.[3] NamingThis minor planet was named after the Katanga Province, a rich mining region in the Democratic Republic of the Congo in Central Africa.[2] The approved naming citation was published by the Minor Planet Center on 1 February 1980 ({{small|M.P.C. 5183}}).[34] References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1817) Katanga |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 145 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1818 |chapter = (1817) Katanga }} [1][2][3][4][5][6][7][8][9][10]2. ^1 2 {{cite web |title = 1817 Katanga (1939 MB) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1817 |accessdate = 15 December 2016}} 3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 15 December 2016}} 4. ^1 2 {{cite web |title = Asteroids and comets rotation curves – (1817) Katanga |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page4cou.html#001817 |accessdate = 15 December 2016}} 5. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (1817) Katanga |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1817%7CKatanga |accessdate = 15 December 2016}} 6. ^1 2 3 4 {{cite journal |first1 = E. F. |last1 = Tedesco |first2 = P. V. |last2 = Noah |first3 = M. |last3 = Noah |first4 = S. 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= 15 December 2016}} 7. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Fumihiko |last1 = Usui |first2 = Daisuke |last2 = Kuroda |first3 = Thomas G. |last3 = Müller |first4 = Sunao |last4 = Hasegawa |first5 = Masateru |last5 = Ishiguro |first6 = Takafumi |last6 = Ootsubo |first7 = Daisuke |last7 = Ishihara |first8 = Hirokazu |last8 = Kataza |first9 = Satoshi |last9 = Takita |first10 = Shinki |last10 = Oyabu |first11 = Munetaka |last11 = Ueno |first12 = Hideo |last12 = Matsuhara |first13 = Takashi |last13 = Onaka |date = October 2011 |title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey |url = http://pasj.oxfordjournals.org/content/63/5/1117.full.pdf+html |journal = Publications of the Astronomical Society of Japan |volume = 63 |issue = 5 |pages = 1117–1138 |bibcode = 2011PASJ...63.1117U |doi = 10.1093/pasj/63.5.1117 |access-date= 15 December 2016}} 8. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = A. K. |last2 = Mainzer |first3 = T. |last3 = Grav |first4 = J. M. |last4 = Bauer |first5 = R. M. |last5 = Cutri |first6 = C. |last6 = Nugent |first7 = M. S. |last7 = Cabrera |date = November 2012 |title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M |journal = The Astrophysical Journal Letters |volume = 759 |issue = 1 |page = 5 |bibcode = 2012ApJ...759L...8M |doi = 10.1088/2041-8205/759/1/L8 |arxiv = 1209.5794 |access-date= 15 December 2016}} 9. ^1 2 {{Cite journal |author = Malcolm, G. |date = June 2002 |title = Rotational Periods and Lightcurves of 445 Edna, 1817 Katanga and 1847 Stobbe |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MPBu...29...28M |journal = The Minor Planet Bulletin |volume = 29 |pages = 28–29 |bibcode = 2002MPBu...29...28M |access-date= 15 December 2016}} 10. ^1 2 {{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= 15 December 2016}} }} External links
5 : Phocaea asteroids|Discoveries by Cyril V. Jackson|Minor planets named for places|Named minor planets|Astronomical objects discovered in 1939 |
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