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词条 1240 Centenaria
释义

  1. Orbit and classification

  2. Naming

  3. Physical characteristics

      Rotation period    Diameter and albedo  

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 1240 Centenaria
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref =  [1]
| discoverer = R. Schorr
| discovery_site = Bergedorf Obs.
| discovered = 5 February 1932
| mpc_name = (1240) Centenaria
| alt_names = 1932 CD{{·}}1930 VA
1930 XG{{·}}A915 RF
| pronounced =
| named_after = Bergedorf Observatory [2]
{{small|(100th anniversary)}}
| mp_category = main-belt [1]{{·}}{{small|(outer)}}
background [5][6]
| orbit_ref =  
| epoch = 27 April 2019 (JD 2458600.5)
| uncertainty = 0
| observation_arc = 87.85 yr (32,088 d)
| aphelion = 3.3686 AU
| perihelion = 2.3653 AU
| semimajor = 2.8670 AU
| eccentricity = 0.1750
| period = 4.85 yr (1,773 d)
| mean_anomaly = 123.27°
| mean_motion = {{Deg2DMS|0.2030|sup=ms}} / day
| inclination = 10.169°
| asc_node = 323.71°
| arg_peri = 24.117°
| mean_diameter = {{val|50.28|18.22|ul=km}}[8]
{{val|56.87|0.67|u=km}}[9]
{{val|58.85|1.5|u=km}}[10]
{{val|63.035|0.266|u=km}}[11][12]
{{val|70.946|0.624|u=km}}[13]
| rotation = {{val|11.2907|0.0007|ul=h}}[14]
| albedo = {{val|0.0463}}[13]
{{val|0.056}}[11][12]
{{val|0.06}}[8]
{{val|0.0673}}[10]
{{val|0.072}}[9]
| spectral_type = C {{small|(assumed)}}[21]
| abs_magnitude = 9.70[9][10][11][13]
10.10[1][8]
}}1240 Centenaria, provisional designation {{mp|1932 CD}}, is a background asteroid from the outer regions of the asteroid belt, approximately {{convert|60|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 5 February 1932, by astronomer Richard Schorr at the Bergedorf Observatory in Hamburg, Germany.[1] The assumed C-type asteroid has a rotation period of 11.3 hours.[21] It was named for the 100th anniversary of the discovering observatory.[2]

Orbit and classification

Centenaria is a non-family asteroid from the main belt's background population.[5][6] It orbits the Sun in the outer asteroid belt at a distance of 2.4–3.4 AU once every 4 years and 10 months (1,773 days; semi-major axis of 2.87 AU). Its orbit has an eccentricity of 0.18 and an inclination of 10° with respect to the ecliptic. The asteroid was first observed as {{mp|A915 RF}} at the United States Naval Observatory in September 1915. The body's observation arc begins at Lowell Observatory in December 1930, or 14 months prior to its official discovery observation at Bergedorf.[1]

Naming

This minor planet was named Centenaria to celebrate the 100th anniversary of the discovering Bergedorf Observatory on 31 October 1933. The official {{MoMP|1240|naming citation}} was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 114}}).[2]

Physical characteristics

Centenaria is an assumed carbonaceous C-type asteroid.[21] The asteroid's determined geometric albedo agrees with a characterization into the C-complex (see below).

Rotation period

In July 2007, a rotational lightcurve of Centenaria was obtained from photometric observations by Julian Oey at the Kingsgrove Observatory {{Obscode|E19}} in Australia. Lightcurve analysis gave a rotation period of {{val|11.2907|0.0007}} hours with a brightness variation of 0.20 magnitude ({{small|U=3}}).[14] The result supersedes previous period determinations of 11.2 hours with and amplitude of 0.12 by Laurent Bernasconi in March 2005 ({{small|U=2-}}),[39] and a period of 14 hours by Mario Di Martino at Pino Torinese in September 1983 ({{small|U=1}}).[40]

Diameter and albedo

According 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, Centenaria measures between 50 and 71 kilometers in diameter and its surface has an albedo between 0.046 and 0.072.[8][9][10][11][12][13]The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0469 and a diameter of 58.61 kilometers based on an absolute magnitude of 10.1.[21] An asteroid occultation from July 2007 measured as cross-section of {{val|58.0|x|58.0|ul=km}}.[5]

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1240) Centenaria |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 103 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1241 |chapter = (1240) Centenaria }}
2. ^1 2 3 4 5 {{cite web |title = 1240 Centenaria (1932 CD) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1240 |accessdate = 15 December 2018}}
3. ^1 {{cite web |title = Asteroids and comets rotation curves – (1240) Centenaria |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page3cou.html#001240 |accessdate = 15 December 2018}}
4. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = T. |last2 = Grav |first3 = A. K. |last3 = Mainzer |first4 = C. R. |last4 = Nugent |first5 = J. M. |last5 = Bauer |first6 = R. |last6 = Stevenson |first7 = S. |last7 = Sonnett |date = August 2014 |title = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos |journal = The Astrophysical Journal |volume = 791 |issue = 2 |page = 11 |bibcode = 2014ApJ...791..121M |doi = 10.1088/0004-637X/791/2/121 |arxiv = 1406.6645 }}
5. ^1 2 {{cite web |title = Asteroid (1240) Centenaria – Proper elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=1240&pc=1.1.6 |accessdate = 14 December 2018}}
6. ^1 2 3 {{cite web |title = Asteroid 1240 Centenaria |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1240+Centenaria |accessdate = 15 December 2018}}
7. ^1 2 3 4 {{cite web |title = LCDB Data for (1240) Centenaria |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1240%7CCentenaria |accessdate = 15 December 2018}}
8. ^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 = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |journal = NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0 |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |access-date= 15 December 2018}}
9. ^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 2018}} (online, [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])
10. ^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 }} (catalog)
11. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = A. K. |last1 = Mainzer |first2 = J. M. |last2 = Bauer |first3 = R. M. |last3 = Cutri |first4 = T. |last4 = Grav |first5 = E. A. |last5 = Kramer |first6 = J. R. |last6 = Masiero |first7 = C. R. |last7 = Nugent |first8 = S. M. |last8 = Sonnett |first9 = R. A. |last9 = Stevenson |first10 = E. L. |last10 = Wright |date = June 2016 |title = NEOWISE Diameters and Albedos V1.0 |url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab |journal = NASA Planetary Data System |pages = EAR-A-COMPIL-5-NEOWISEDIAM-V1.0 |bibcode = 2016PDSS..247.....M |access-date= 15 December 2018}}
12. ^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 |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 }}
13. ^1 {{Cite journal |author = di Martino, M. |date = December 1984 |title = Physical study of asteroids - Lightcurves and rotational periods of six asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1984Icar...60..541D |journal = Icarus |volume = 60 |issue = 3 |pages = 541–546.ResearchsupportedbytheConsiglioNazionaledelleRicerche |issn = 0019-1035 |bibcode = 1984Icar...60..541D |doi = 10.1016/0019-1035(84)90162-3 |access-date= 15 December 2018}}
14. ^1 2 {{Cite journal |author = Oey, Julian |date = September 2008 |title = Lightcurve Analysis of Asteroids from the Kingsgrove and Leura Observatories in the 2nd Half of 2007 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..132O |journal = The Minor Planet Bulletin |volume = 35 |issue = 3 |pages = 132–135 |issn = 1052-8091 |bibcode = 2008MPBu...35..132O |access-date= 15 December 2018}}
[1][2][3][4][5][6][7][8][9][10][11][12][13][14]

}}

External links

  • Asteroid Lightcurve Database (LCDB), query form (info)
  • [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
  • Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
  • [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
  • {{AstDys|1240}}
  • {{JPL small body}}
{{Use dmy dates|date=December 2018}}{{Minor planets navigator |1239 Queteleta |number=1240 |1241 Dysona}}{{Small Solar System bodies}}{{DEFAULTSORT:Centenaria}}

4 : Background asteroids|Discoveries by Richard Schorr|Named minor planets|Astronomical objects discovered in 1932
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