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词条 1008 La Paz
释义

  1. Orbit and classification

  2. Physical characteristics

      Lightcurves    Diameter and albedo  

  3. Naming

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 1008 La Paz
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref =  
| discoverer = M. F. Wolf
| discovery_site = Heidelberg Obs.
| discovered = 31 October 1923
| mpc_name = (1008) La Paz
| alt_names = 1923 PD{{·}}1950 UN
1970 JA
| pronounced =
| named_after = La Paz {{small|(Bolivian capital)}}[2]
| mp_category = main-belt{{·}}{{small|(outer)}} [3]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 93.41 yr (34,118 days)
| aphelion = 3.3333 AU
| perihelion = 2.8495 AU
| semimajor = 3.0914 AU
| eccentricity = 0.0783
| period = 5.44 yr (1,985 days)
| mean_anomaly = 70.925°
| mean_motion = {{Deg2DMS|0.1813|sup=ms}} / day
| inclination = 8.9362°
| asc_node = 20.553°
| arg_peri = 14.821°
| dimensions = 38.54 km {{small|(derived)}}[3]
{{val|38.64|2.7}} km[6]
{{val|39.02|0.66}} km[7]
{{val|40.13|13.98}} km[8]
{{val|41.061|0.240}} km[9]
{{val|45.450|0.245}} km[10]
{{val|49.27|17.54}} km[11]
{{val|50.50|0.91}} km[12]
| rotation = {{val|8.998|0.002}} h[13]
{{val|9.002|0.001}} h[13]
| albedo = {{val|0.04|0.02}}[11]
{{val|0.048|0.002}}[12]
{{val|0.05|0.03}}[8]
{{val|0.0592|0.0140}}[10]
0.0684 {{small|(derived)}}[3]
{{val|0.073|0.018}}[7]
{{val|0.0819|0.013}}[6]
{{val|0.099|0.015}}[9]
| spectral_type = C [3]
| abs_magnitude = 10.40[6][10][12]{{·}}10.50[7]{{·}}10.60[3][11]{{·}}10.74[8]{{·}}{{val|10.92|0.75}}[32]
}}La Paz (minor planet designation: 1008 La Paz), provisional designation {{mp|1923 PD}}, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 31 October 1923, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory and named after the city La Paz in Bolivia.[2][34]

Orbit and classification

La Paz is a background asteroid as it does not belong to any known asteroid family. It orbits the Sun in the outer main-belt at a distance of 2.8–3.3 AU once every 5 years and 5 months (1,985 days). Its orbit has an eccentricity of 0.08 and an inclination of 9° with respect to the ecliptic. The body's observation arc begins at Heidelberg, 10 days after its official discovery observation.[34]

Physical characteristics

La Paz is an assumed carbonaceous C-type asteroid.[3]

Lightcurves

In November 2005, a rotational lightcurve of La Paz was obtained from photometric observations by French amateur astronomer René Roy. Lightcurve analysis gave a well-defined rotation period of 8.998 hours with a brightness amplitude of 0.14 magnitude ({{small|U=3}}).[13] In March 2007, a concurring period of 9.002 hours and an amplitude of 0.14 magnitude ({{small|U=3-}}) was obtained by astronomers Roberto Crippa and Federico Manzini at the Sozzago Astronomical Station in Italy ({{small|A12}}).[13]

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, La Paz measures between 38.64 and 50.50 kilometers in diameter and its surface has an albedo between 0.04 and 0.099.[6][7][8][9][10][11][12]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0684 and a diameter of 38.54 kilometers based on an absolute magnitude of 10.6.[3]

Naming

This minor planet was named after La Paz, the capital city of Bolivia in South America. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 96}}).[2]

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1008) La Paz |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 87 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1009 |chapter = (1008) la Paz }}
2. ^1 2 {{cite web |title = 1008 La Paz (1923 PD) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1008 |accessdate = 29 August 2017}}
3. ^1 2 3 4 {{cite web |title = Asteroids and comets rotation curves – (1008) La Paz |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page3cou.html#001008 |accessdate = 29 August 2017}}
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 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M |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 |access-date= 29 August 2017}}
5. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (1008) La Paz |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1008%7CLa%20Paz |accessdate = 29 August 2017}}
6. ^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= 29 August 2017}}
7. ^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 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N |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 |access-date= 29 August 2017}}
8. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = C. R. |last1 = Nugent |first2 = A. |last2 = Mainzer |first3 = J. |last3 = Bauer |first4 = R. M. |last4 = Cutri |first5 = E. A. |last5 = Kramer |first6 = T. |last6 = Grav |first7 = J. |last7 = Masiero |first8 = S. |last8 = Sonnett |first9 = E. L. |last9 = Wright |date = September 2016 |title = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016AJ....152...63N |journal = The Astronomical Journal |volume = 152 |issue = 3 |page = 12 |bibcode = 2016AJ....152...63N |doi = 10.3847/0004-6256/152/3/63 |arxiv = 1606.08923 |access-date= 29 August 2017}}
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= 29 August 2017}}
10. ^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= 29 August 2017}}
11. ^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 }}
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= 29 August 2017}}
[1][2][3][4][5][6][7][8][9][10][11][12]

}}

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 |1007 Pawlowia |number=1008 |1009 Sirene}}{{Small Solar System bodies}}{{DEFAULTSORT:La Paz}}

5 : Background asteroids|Discoveries by Max Wolf|Minor planets named for places|Named minor planets|Astronomical objects discovered in 1923
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