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词条 2204 Lyyli
释义

  1. Orbit and classification

  2. Physical characteristics

  3. Naming

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 2204 Lyyli
| background = #FA8072
| image =
| image_size =
| caption =
| discovery_ref =  
| discovered = 3 March 1943
| discoverer = Y. Väisälä
| discovery_site = Turku Obs.
| mpc_name = (2204) Lyyli
| alt_names = 1943 EQ{{·}}1968 DN
| named_after = Lyyli Heinänen {{small|(Esperantist)}}[2]
| mp_category = Mars-crosser [4]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 73.75 yr (26,937 days)
| aphelion = 3.6435 AU
| perihelion = 1.5354 AU
| semimajor = 2.5894 AU
| eccentricity = 0.4071
| period = 4.17 yr (1,522 days)
| mean_anomaly = 350.25°
| inclination = 20.561°
| asc_node = 160.45°
| arg_peri = 283.25°
| moid = 0.6872 AU
| dimensions = {{val|25.16|2.4}} km {{small|(IRAS:11)}}[6]
25.27 km {{small|(derived)}}[7]
{{val|27.12|1.31}} km[8]
| rotation = {{val|9.51|0.01}} h[9]
{{val|10|}} h[10]
{{val|11.063|0.001}} h[11]
{{val|11.09|0.01}} h[12]
| albedo = {{val|0.020|0.002}}[8]
{{val|0.0232|0.005}} {{small|(IRAS:11)}}[6]
{{val|0.050|0.006}}[15]
0.0537 {{small|(derived)}}[7]
| spectral_type = SMASS = X {{·}}P [15]{{·}}X [7]
| abs_magnitude = {{val|11.61|0.44}}[20]{{·}}11.78[7]{{·}}12.1{{·}}12.70[6][8]
}}2204 Lyyli, provisional designation {{mp|1943 EQ}}, is a dark asteroid and very eccentric Mars-crosser from the middle region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 3 March 1943 by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.[4]

Orbit and classification

Lyyli orbits the Sun in the central main-belt at a distance of 1.5–3.6 AU once every 4 years and 2 months (1,522 days). Its orbit has an eccentricity of 0.41 and an inclination of 21° with respect to the ecliptic.

Physical characteristics

Lyyli is a X-type asteroid in the SMASS classification. It has also been characterized as a P-type asteroid by NASA's NEOWISE mission.[15]

It has a rotation period of 11 hours[11] and a very low albedo between 0.02 and 0.05, according to the surveys carried out by IRAS, Akari, and WISE/NEOWISE.[6][8][15]

Other large Mars crossing minor planets include 132 Aethra and 323 Brucia, with diameters of 43 and 36 kilometers, respectively.

Naming

This minor planet was named in honour of Lyyli Heinänen (1903–1988), née Hartonen, a Finnish female Esperantist, professor of mathematics, amateur astronomer and former assistant of the discoverer.[2] The official naming citation was published by the Minor Planet Center on 26 May 1983 ({{small|M.P.C. 7944}}).[34]

References

1. ^1 2 {{cite book |title = Dictionary of Minor Planet Names – (2204) Lyyli |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 179 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_2205 |chapter = (2204) Lyyli }}
2. ^1 2 {{cite web |title = 2204 Lyyli (1943 EQ) |website = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=2204 |accessdate = 7 December 2016}}
3. ^1 {{cite web |title = MPC/MPO/MPS Archive |website = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 7 December 2016}}
4. ^1 2 3 4 {{cite web |title = LCDB Data for (2204) Lyyli |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2204%7CLyyli |accessdate = 7 December 2016}}
5. ^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 |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |access-date= 7 December 2016}}
6. ^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= 7 December 2016}}
7. ^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= 2 May 2016}}
8. ^1 {{Cite journal |first1 = R. A. |last1 = Mohamed |first2 = Yu. N. |last2 = Krugly |first3 = F. P. |last3 = Velichko |date = April 1994 |title = Photometry of two Mars-crossing asteroids 2078 Nanking and 2204 Lyyli |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1994P&SS...42..341M |journal = Planetary and Space Science |volume = 42 |issue = 4 |pages = 341–343 |bibcode = 1994P&SS...42..341M |doi = 10.1016/0032-0633(94)90107-4 |access-date= 7 December 2016}}
9. ^1 {{Cite journal |first1 = R. |last1 = Gil-Hutton |first2 = |last2 = Cañ |first3 = M. |last3 = ada |date = April 2003 |title = Photometry of Fourteen Main Belt Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2003RMxAA..39...69G |journal = Revista Mexicana de Astronomía y Astrofísica |volume=39 |pages = 69–76 |bibcode = 2003RMxAA..39...69G |access-date= 7 December 2016}}
10. ^1 2 {{Cite journal |author = Warner, Brian D. |date = October 2010 |title = Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2010 March - June |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37..161W |journal = The Minor Planet Bulletin |volume = 37 |issue = 4 |pages = 161–165 |issn = 1052-8091 |bibcode = 2010MPBu...37..161W |access-date= 7 December 2016}}
11. ^1 {{Cite journal |author = Warner, Brian D. |date = January 2016 |title = Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 June-September |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43...57W |journal = The Minor Planet Bulletin |volume = 43 |issue = 1 |pages = 57–65 |issn = 1052-8091 |bibcode = 2016MPBu...43...57W |access-date= 7 December 2016}}
12. ^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= 7 December 2016}}
[1][2][3][4][5][6][7][8][9][10][11][12]

}}

External links

  • Lightcurve plot of 2204 Lyyli, Palmer Divide Observatory, B. D. Warner (2010)
  • 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|2203 van Rhijn|number=2204|2205 Glinka}}{{Small Solar System bodies}}{{DEFAULTSORT:Lyyli}}

5 : Mars-crossing asteroids|Discoveries by Yrjö Väisälä|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1943
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