| 词条 | 9423 Abt |
| 释义 |
| minorplanet = yes | name = 9423 Abt | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discovered = 12 January 1996 | discoverer = Spacewatch | discovery_site = Kitt Peak Obs. | mpc_name = (9423) Abt | alt_names = {{mp|1996 AT|7}}{{·}}1974 DU {{mp|1981 US|15}}{{·}}{{mp|1983 CK|8}} {{mp|1990 VH|15}}{{·}}{{mp|1992 DP|2}} | named_after = Helmut Abt {{small|(American astrophysicist)}}[2] | mp_category = main-belt{{·}}{{small|(middle)}} [3] background | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 42.95 yr (15,686 days) | aphelion = 2.9681 AU | perihelion = 2.4182 AU | semimajor = 2.6932 AU | eccentricity = 0.1021 | period = 4.42 yr (1,614 days) | mean_anomaly = 114.30° | mean_motion = {{Deg2DMS|0.2230|sup=ms}} / day | inclination = 8.8476° | asc_node = 106.16° | arg_peri = 219.27° | dimensions = {{val|12.690|0.145}} km[5][6] {{val|12.84|0.86}} km[7] 13.29 km {{small|(calculated)}}[3] | rotation = {{val|3.2766|0.0003}} h[9] {{val|3.281|0.005}} h[10] | albedo = 0.10 {{small|(assumed)}}[3] {{val|0.132|0.012}}[5][6] {{val|0.141|0.020}}[7] | spectral_type = S [3] | abs_magnitude = 12.5[3]{{·}}12.20[7]{{·}}12.3[5]{{·}}{{val|12.516|0.003}} {{small|(R)}}[9]{{·}}{{val|12.15|0.31}}[21] }} 9423 Abt, provisional designation {{mp|1996 AT|7}}, is a stony background asteroid from the central region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 12 January 1996, by the Spacewatch project of the University of Arizona at Kitt Peak National Observatory, United States.[22] The asteroid was named after American astronomer Helmut Abt. Orbit and classificationAbt is a non-family asteroid from the main belt's background population. It orbits the Sun in the central main-belt at a distance of 2.4–3.0 AU once every 4 years and 5 months (1,614 days). Its orbit has an eccentricity of 0.10 and an inclination of 9° with respect to the ecliptic. It was first identified as {{mp|1974 DU}} at Crimea-Nauchnij in February 1974, extending the body's observation arc by 22 years prior to its official discovery observation at Kitt Peak.[22]NamingThis minor planet was named after American astrophysicist Helmut Abt (born 1925), one of the founders of the discovering Kitt Peak National Observatory, after which the minor planet 2322 Kitt Peak is named. His research included stellar properties and systems. As senior editor of The Astrophysical Journal he was responsible for converting it into its digital format.[2] The official naming citation was published by the Minor Planet Center on 11 November 2000 {{small|(M.P.C. 41568)}}.[26] Physical characteristicsRotation periodIn 2006, a rotational lightcurve of Abt was obtained from photometric observation at Hunters Hill Observatory, Australia. Lightcurve analysis gave a well-defined rotation period of {{val|3.281}} hours with a brightness variation of 0.30 magnitude ({{small|U=3}}).[10] In 2012, a second lightcurve from the Palomar Transient Factory, California, gave a concurring period of {{val|3.2766}} hours with an amplitude of 0.33 magnitude ({{small|U=2}}).[9] Diameter and albedoAccording to the surveys carried out by the NEOWISE mission of the NASA's Wide-field Infrared Survey Explorer and the Japanese Akari satellite, Abt measures 12.690 and 12.84 kilometers in diameter, and its surface has an albedo of 0.132 and 0.141, respectively.[5][6][7] The Collaborative Asteroid Lightcurve Link calculates a diameter of 13.29 kilometers, assuming an albedo of 0.10, a compromise figure between the brighter stony and darker carbonaceous bodies from the inner and outer asteroid-belt, respectively.[3] References1. ^1 2 {{cite book |title = Dictionary of Minor Planet Names – (9423) Abt |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 692 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_7509 |chapter = (9423) Abt }} [1][2][3][4][5][6][7][8][9][10]2. ^1 2 {{cite web |title = 9423 Abt (1996 AT7) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=9423 |accessdate = 27 April 2016}} 3. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (9423) Abt |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=9423%7CAbt |accessdate = 27 April 2016}} 4. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 27 April 2016}} 5. ^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://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011PASJ...63.1117U |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= 12 January 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 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M |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 |access-date= 27 April 2016}} 7. ^1 2 {{cite journal |display-authors = 6 |first1 = David |last1 = Higgins |first2 = Petr |last2 = Pravec |first3 = Peter |last3 = Kusnirak |first4 = Adrian |last4 = Galad |first5 = Leos |last5 = Kornos |first6 = Donald |last6 = Pray |first7 = Robert A. |last7 = Koff |date = December 2006 |title = Asteroid lightcurve analysis at Hunters Hill Observatory and collaborating stations – autumn 2006 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2006MPBu...33...89H |journal = The Minor Planet Bulletin |volume = 33 |issue = 4 |pages = 89–91 |issn = 1052-8091 |bibcode = 2006MPBu...33...89H |access-date= 12 January 2016}} 8. ^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= 27 April 2016}} 9. ^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= 27 April 2016}} 10. ^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= 4 December 2016}} }} External links
5 : Background asteroids|Discoveries by the Spacewatch project|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1996 |
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