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词条 418 Alemannia
释义

  1. Orbit and classification

  2. Physical characteristics

      Rotation period    Diameter and albedo  

  3. Naming

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 418 Alemannia
| background = #D6D6D6
| image =
| caption =
| discovery_ref =  
| discoverer = M. F. Wolf
| discovery_site = Heidelberg Obs.
| discovered = 7 September 1896
| mpc_name = (418) Alemannia
| alt_names = 1896 CV
| named_after = Alemannia [2]
{{small|(student fraternity)}}
| mp_category = main-belt{{·}}{{small|(middle)}}
background [3]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 111.94 yr (40,886 days)
| aphelion = 2.9024 AU
| perihelion = 2.2829 AU
| semimajor = 2.5927 AU
| eccentricity = 0.1195
| period = 4.17 yr (1,525 days)
| mean_anomaly = 327.11°
| mean_motion = {{Deg2DMS|0.2361|sup=ms}} / day
| inclination = 6.8178°
| asc_node = 248.83°
| arg_peri = 126.68°
| dimensions = {{val|32.98|1.04}} km[5]
{{val|34.10|4.6}} km[6][7]
{{val|40.12|0.62}} km[8]
{{val|40.330|0.578}} km[9]
{{val|45.448|0.509}} km[10]
| rotation = {{val|4.67|0.05}} h[11]
4.671 h[6]
{{val|4.6714|0.0001}} h[11]
{{val|4.6727|0.0003}} h[11]
{{val|4.680|0.024}} h[15]
{{val|5.82}} h {{small|(poor)}}[16]
| albedo = {{val|0.1057|0.0158}}[10]
{{val|0.137|0.005}}[8]
{{val|0.1878|0.062}}[6][7]
{{val|0.201|0.027}}[5][5]
| spectral_type = Tholen {{=}} M [6]{{·}}M [10]
B–V {{=}} 0.703
U–B {{=}} 0.225
| abs_magnitude = 9.77[5][6][7][8][10]{{·}}{{val|9.83|0.32}}[34]
}}Alemannia (minor planet designation: 418 Alemannia), provisional designation {{mp|1896 CV}}, is a metallic background asteroid from the central region of the asteroid belt, approximately 35 kilometers in diameter. It was discovered by German astronomer Max Wolf at Heidelberg Observatory in southern Germany on 7 September 1896 and named for the student fraternity Alemannia in Heidelberg.[2][36]

Orbit and classification

Alemannia is a non-family asteroid from the main belt's background population.[3] It orbits the Sun in the intermediate main-belt at a distance of 2.3–2.9 AU once every 4 years and 2 months (1,525 days; semi-major axis of 2.59 AU). Its orbit has an eccentricity of 0.12 and an inclination of 7° with respect to the ecliptic. The body's observation arc begins at Heidelberg in December 1905, more than 9 years after its official discovery observation.[36]

Physical characteristics

In the Tholen classification, Alemannia is a metallic M-type asteroid.[6] The Wide-field Infrared Survey Explorer (WISE) also characterized it as an M-type.[10]

Rotation period

The best-rated photometric lightcurve observations gave a rotation period of 4.671 hours with a brightness amplitude between 0.20 and 0.33 magnitude ({{small|U=3}}),[11] superseding previous observations that gave a period of 5.82 and 4.68 hours, respectively.[16][15]

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 WISE telescope, Alemannia measures between 32.98 and 45.448 kilometers in diameter and its surface has an albedo between 0.1057 and 0.201.[5][7][8][9][10]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1878 and a diameter of 34.1 kilometers based on an absolute magnitude of 9.77.[6][7]

Naming

This minor planet was named for the student fraternity Alemannia in Heidelberg, Germany. It was named by German astronomer Adolf Berberich (1861–1920) in 1901. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 45}}).[2]

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (418) Alemannia |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 45 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_419 |chapter = (418) Alemannia }}
2. ^1 2 {{cite web |title = 418 Alemannia (1896 CV) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=418 |accessdate = 21 December 2017}}
3. ^1 2 3 4 {{cite web |title = Asteroids and comets rotation curves – (418) Alemannia |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page2cou.html#000418 |accessdate = 21 December 2017}}
4. ^1 2 {{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 = Small Bodies Data Ferret |work = Nesvorny HCM Asteroid Families V3.0 |url = https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action |accessdate = 21 December 2017}}
6. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (418) Alemannia |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=418%7CAlemannia |accessdate = 21 December 2017}}
7. ^1 2 3 4 5 {{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://sbn.psi.edu/pds/asteroid/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |journal = NASA Planetary Data System |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |access-date = 21 December 2017 |archive-url = https://web.archive.org/web/20160603231123/http://sbn.psi.edu/pds/asteroid/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |archive-date = 2016-06-03 |dead-url = yes |df = }}
8. ^1 2 3 4 5 6 {{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 }}
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= 21 December 2017}}
10. ^1 2 3 4 5 {{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= 21 December 2017}}
11. ^1 2 {{cite journal |first1 = C.-I. |last1 = Lagerkvist |first2 = G. |last2 = Hahn |first3 = P. |last3 = Magnusson |first4 = H. |last4 = Rickman |date = July 1987 |title = Physical studies of asteroids XVI - Photoelectric photometry of 17 asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987A&AS...70...21L |journal = Astronomy and Astrophysics Supplement Series |volume = 70 |issue = 1 |pages = 21–32 |issn = 0365-0138 |bibcode = 1987A&AS...70...21L |access-date= 21 December 2017}}
12. ^1 2 {{Cite journal |first1 = C. J. |last1 = Wetterer |first2 = C. R. |last2 = Saffo |first3 = S. |last3 = Majcen |date = December 1999 |title = CCD Photometry of Asteroids at the US Air Force Academy Observatory During 1998 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1999MPBu...26...30W |journal = The Minor Planet Bulletin |volume = 26. |page = 30 |bibcode = 1999MPBu...26...30W |access-date= 21 December 2017}}
13. ^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= 21 December 2017}}
[1][2][3][4][5][6][7][8][9][10][11][12][13]

}}

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
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • {{JPL small body}}
{{Minor planets navigator |417 Suevia |number=418 |419 Aurelia}}{{Small Solar System bodies}}{{DEFAULTSORT:Alemannia}}

5 : Background asteroids|Discoveries by Max Wolf|Named minor planets|M-type asteroids (Tholen)|Astronomical objects discovered in 1896
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