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词条 1354 Botha
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 = 1354 Botha
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref =  
| discoverer = C. Jackson
| discovery_site = Johannesburg Obs.
| discovered = 3 April 1935
| mpc_name = (1354) Botha
| alt_names = 1935 GK{{·}}1925 RF
1930 KG{{·}}1931 TP
1935 JK{{·}}{{mp|1953 TO|1}}
{{mp|1953 TY|2}}
| pronounced =
| named_after = Louis Botha [2]
{{small|(South African prime minister)}}
| mp_category = main-belt{{·}}{{small|(outer)}} [3]
background [4]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 85.55 yr (31,248 days)
| aphelion = 3.8022 AU
| perihelion = 2.4451 AU
| semimajor = 3.1237 AU
| eccentricity = 0.2172
| period = 5.52 yr (2,017 days)
| mean_anomaly = 255.58°
| mean_motion = {{Deg2DMS|0.1785|sup=ms}} / day
| inclination = 5.9581°
| asc_node = 28.715°
| arg_peri = 250.45°
| dimensions = {{val|38.41|12.74}} km[6]
{{val|41.732|0.504}} km[7]
{{val|42.54|0.69}} km[8]
{{val|46.567|0.550}} km[9]
{{val|48.75|5.8}} km[10]
48.82 km {{small|(derived)}}[3]
{{val|70.34|0.88}} km[12]
| rotation = {{val|4}} h {{small|(poor)}}[13]
| albedo = {{val|0.014|0.003}}[12][12]
{{val|0.0225|0.006}}[10]
{{val|0.0246|0.0047}}[9]
0.0295 {{small|(derived)}}[3]
{{val|0.030|0.001}}[8]
{{val|0.05|0.04}}[6]
| spectral_type = C {{small|(assumed)}}[3]
| abs_magnitude = 11.00[3][12]{{·}}11.03[6]{{·}}{{val|11.20|0.35}}[26]{{·}}11.30[8][9][10]
}}1354 Botha, provisional designation {{mp|1935 GK}}, is an exceptionally dark background asteroid from the outer regions of the asteroid belt, approximately 46 kilometers in diameter. It was discovered on 3 April 1935, by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg.[30] The asteroid was named after South African prime minister Louis Botha.[2]

Orbit and classification

Botha is a non-family asteroid of the main belt's background population.[4] It orbits the Sun in the outer asteroid belt at a distance of 2.4–3.8 AU once every 5 years and 6 months (2,017 days; semi-major axis of 3.12 AU). Its orbit has an eccentricity of 0.22 and an inclination of 6° with respect to the ecliptic.

The asteroid was first identified as {{mp|1925 RF}} at Heidelberg Observatory in September 1929. The body's observation arc begins at with its identification as {{mp|1931 TP}} at Simeiz Observatory in October 1931, more than three years prior to its official discovery observation at Johannesburge.[30]

Physical characteristics

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

Rotation period

In September 2003, a fragmentary rotational lightcurve of Botha was obtained from photometric observations by Swiss astronomers Stefano Sposetti and Raoul Behrend. Lightcurve analysis gave a tentative rotation period of 4 hours with a brightness amplitude of 0.21 magnitude ({{small|U=1+}}).[13] As of 2017, no secure period has been obtained.[3]

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, Botha measures between 38.41 and 70.34 kilometers in diameter and its surface has an albedo between 0.014 and 0.05.[6][7][8][9][10][12]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0295 and a diameter of 48.82 kilometers based on an absolute magnitude of 11.0.[3]

Naming

This minor planet was named after Louis Botha (1862–1919), the first Prime Minister of South Africa of the Union of South Africa, which existed between 1910 and 1961.[2] The official naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 908}}).[46]

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1354) Botha |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 110 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1355 |chapter = (1354) Botha }}
2. ^1 2 {{cite web |title = 1354 Botha (1935 GK) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1354 |accessdate = 15 November 2017}}
3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 15 November 2017}}
4. ^1 2 {{cite web |title = Asteroids and comets rotation curves – (1354) Botha |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page4cou.html#001354 |accessdate = 15 November 2017}}
5. ^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 |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= 15 November 2017}}
6. ^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 = 15 November 2017}}
7. ^1 2 3 4 5 6 7 8 {{cite web |title = LCDB Data for (1354) Botha |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1354%7CBotha |accessdate = 15 November 2017}}
8. ^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= 15 November 2017}}
9. ^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= 15 November 2017}}
10. ^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 November 2017}}
11. ^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://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 = 15 November 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 = }}
12. ^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 }}
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= 15 November 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 |1353 Maartje |number=1354 |1355 Magoeba}}{{Small Solar System bodies}}{{DEFAULTSORT:Botha}}

5 : Background asteroids|Discoveries by Cyril V. Jackson|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1935
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