| 词条 | 1617 Alschmitt |
| 释义 |
| minorplanet = yes | name = 1617 Alschmitt | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discovered = 20 March 1952 | discoverer = L. Boyer | discovery_site = Algiers Obs. | mpc_name = (1617) Alschmitt | named_after = Alfred Schmitt {{small|(astronomer)}}[2] | alt_names = 1952 FB{{·}}{{mp|1929 CC|1}} 1935 ER{{·}}1941 HH 1947 LS{{·}}{{mp|1952 DK|2}} 1975 AJ{{·}}A906 DC | mp_category = main-belt{{·}}{{small|(outer)}} [3] | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 111.18 yr (40,607 days) | aphelion = 3.6085 AU | perihelion = 2.7913 AU | semimajor = 3.1999 AU | eccentricity = 0.1277 | period = 5.72 yr (2,091 days) | mean_anomaly = 167.85° | mean_motion = {{Deg2DMS|0.1722|sup=ms}} / day | inclination = 13.265° | asc_node = 154.96° | arg_peri = 24.216° | dimensions = {{val|21.12|2.86}} km[5] {{val|21.283|0.267}} km[6][7] 36.78 km {{small|(calculated)}}[3] | rotation = {{val|7.0602|0.0033}} h[9] {{val|7.0613|0.0007}} h[10] {{val|7.062|0.002}} h[10] | albedo = 0.057 {{small|(assumed)}}[3] {{val|0.190|0.046}}[5] {{val|0.270|0.020}}[6][7] | spectral_type = C [3] | abs_magnitude = 10.4[6]{{·}}10.80[5]{{·}}{{val|10.807|0.002}} {{small|(R)}}[9]{{·}}10.9[3] }}1617 Alschmitt, provisional designation {{mp|1952 FB}}, is an assumed carbonaceous asteroid from in the outer parts of the main belt, approximately 30 kilometers in diameter. It was discovered on 20 March 1952, by French astronomer Louis Boyer at Algiers Observatory in Algeria, Northern Africa, and named after French astronomer Alfred Schmitt.[2][23] Orbit and classificationThis asteroid orbits the Sun in the outer main-belt at a distance of 2.8–3.6 AU once every 5 years and 9 months (2,091 days). Its orbit has an eccentricity of 0.13 and an inclination of 13° with respect to the ecliptic. Alschmitt was first identified as {{mp|A906 DC}} at Heidelberg in 1906, extending the body's observation arc by 46 years prior to its official discovery observation.[23] Physical characteristicsAlschmitt is a presumed carbonaceous C-type asteroid.[3]LightcurvesTwo rotational lightcurve of Alschmitt obtained in 2003 and 2004, by René Roy and Laurent Bernasconi, gave a well-defined rotation period of 7.0613 and 7.062 hours with a brightness variation of 0.39 and 0.52 in magnitude, respectively ({{small|U=3/3}}).[9] In October 2010, the Palomar Transient Factory derived a period of 7.0602 hours with an amplitude 0.49 magnitude ({{small|U=2}}).[9] Diameter and albedoAccording to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Alschmitt measures 21.12 and 21.28 kilometers in diameter, and its surface has an albedo of 0.190 and 0.270, respectively.[5][6][7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 36.78 kilometers using an absolute magnitude of 10.9.[3] NamingBoyer named this minor planet for his colleague Alfred Schmitt (1907–1973), astronomer at Algiers, Strasbourg and Quito observatories, who, 20 years earlier, had named the asteroid 1215 Boyer in his honor.[2] The official naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 4418}}).[34] References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1617) Alschmitt |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 128 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1618 |chapter = (1617) Alschmitt }} [1][2][3][4][5][6][7][8][9]2. ^1 2 {{cite web |title = 1617 Alschmitt (1952 FB) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1617 |accessdate = 28 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 = 28 December 2016}} 4. ^1 2 {{cite web |title = Asteroids and comets rotation curves – (1617) Alschmitt |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page4cou.html#001617 |accessdate = 28 December 2016}} 5. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (1617) Alschmitt |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1617%7CAlschmitt |accessdate = 28 December 2016}} 6. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = E. |last4 = Hand |first5 = J. |last5 = Bauer |first6 = D. |last6 = Tholen |first7 = R. S. |last7 = McMillan |first8 = T. |last8 = Spahr |first9 = R. M. |last9 = Cutri |first10 = E. |last10 = Wright |first11 = J. |last11 = Watkins |first12 = W. |last12 = Mo |first13 = C. |last13 = Maleszewski |date = November 2011 |title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 25 |bibcode = 2011ApJ...741...90M |doi = 10.1088/0004-637X/741/2/90 |arxiv = 1109.6407 }} 7. ^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= 28 December 2016}} 8. ^1 2 3 4 {{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= 28 December 2016}} 9. ^1 2 3 {{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 = J. |last6 = Dailey |first7 = P. R. M. |last7 = Eisenhardt |first8 = R. S. |last8 = McMillan |first9 = T. B. |last9 = Spahr |first10 = M. F. |last10 = Skrutskie |first11 = D. |last11 = Tholen |first12 = R. G. |last12 = Walker |first13 = E. L. |last13 = Wright |first14 = E. |last14 = DeBaun |first15 = D. |last15 = Elsbury |first16 = T., IV |last16 = Gautier |first17 = S. |last17 = Gomillion |first18 = A. |last18 = Wilkins |date = November 2011 |title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 20 |bibcode = 2011ApJ...741...68M |doi = 10.1088/0004-637X/741/2/68 |arxiv = 1109.4096 |access-date= 28 December 2016}} }} External links
5 : Background asteroids|Discoveries by Louis Boyer (astronomer)|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1952 |
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