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词条 1911 Schubart
释义

  1. Orbit and classification

  2. Physical characteristics

      Diameter and albedo    Rotation period  

  3. Naming

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 1911 Schubart
| background = #D6D6D6
| discovery_ref =  
| discovered = 25 October 1973
| discoverer = P. Wild
| discovery_site = Zimmerwald Obs.
| mpc_name = (1911) Schubart
| alt_names = 1973 UD{{·}}1928 DW
{{mp|1933 UX|1}}{{·}}{{mp|1941 SU|1}}
{{mp|1951 AH|1}}{{·}}{{mp|1952 DS|2}}
1960 EF{{·}}1968 FM
1972 RO{{·}}{{mp|1972 TY|4}}
| named_after = Joachim Schubart
{{small|(German astronomer)}}[2]
| mp_category = main-belt{{·}}{{small|(outer)}}
Hilda{{·}}Schubart [4]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 89.27 yr (32,606 days)
| aphelion = 4.6512 AU
| perihelion = 3.3013 AU
| semimajor = 3.9762 AU
| eccentricity = 0.1697
| period = 7.93 yr (2,896 days)
| mean_anomaly = 136.84°
| mean_motion = {{Deg2DMS|0.1243|sup=ms}} / day
| inclination = 1.6431°
| asc_node = 284.84°
| arg_peri = 181.75°
| jupiter_moid = 0.5059 AU
| tisserand = 3.0310
| dimensions = {{val|64.66|23.84}} km[6]
{{val|67.476|0.504}} km[7]
{{val|80.09|2.0}} km[8]
80.11 km {{small|(derived)}}[9]
{{val|80.13|1.25}} km[10]
| rotation = {{val|7.91|0.02}} h[11]
{{val|11.915|0.002}} h[12]
| albedo = {{val|0.0249|0.001}}[8]
{{val|0.025|0.001}}[10]
0.0316 {{small|(derived)}}[9]
{{val|0.035|0.001}}[7]
{{val|0.04|0.01}}[7]
{{val|0.04|0.03}}[6]
| spectral_type = {{nowrap|Tholen {{=}} P [9]{{·}}C/P [7]}}
B–V {{=}} 0.701
U–B {{=}} 0.217
| abs_magnitude = 9.85[9][25]{{·}}10.11[6][8][10]
}}1911 Schubart, provisional designation {{mp|1973 UD}}, is a dark Hildian asteroid and parent body of the Schubart family, located in the outermost region of the asteroid belt, approximately 70 kilometers in diameter. It was discovered on 25 October 1973, by Swiss astronomer Paul Wild at Zimmerwald Observatory, near Bern, Switzerland.[30] The asteroid was named after German astronomer Joachim Schubart.[2]

Orbit and classification

With an diameter of 65–80 kilometers, it is one of the largest members of the Hilda group of asteroids, which are in 3:2 orbital resonance with the gas-giant Jupiter. More specifically, it is the parent body and namesake of the Schubart family ({{small|002}}),[4] one of two asteroid families within the Hilda group (the other one is the Hilda family itself).[33][34]{{rp|23}} It is the darkest P-type asteroid with a very low geometric albedo of 0.0249.

The body's observation arc begins with its first identification as {{mp|1928 DW}} at Heidelberg Observatory in February 1928, more than 45 years prior to its official discovery observation at Zimmerwald .[30]

Physical characteristics

In the Tholen classification, Schubart is a primitive P-type asteroid.[9] The Wide-field Infrared Survey Explorer (WISE) characterized it as both P- and C-type asteroid.[7]

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, Schubart measures between 64.66 and 80.13 kilometers in diameter and its surface has an albedo between 0.0249 and 0.04.[6][7][8][10]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0316 and a diameter of 80.11 kilometers based on an absolute magnitude of 9.85.[9]

Rotation period

Two rotational lightcurves of Schubart were obtained from photometric observations by Johan Warell and Robert Stephens in 2015 and 2016, respectively. Lightcurve analysis gave a rotation period of 7.91 and 11.915 hours with a brightness amplitude of 0.11 and 0.22 in magnitude, respectively ({{small|U=2/2}}).[11][12]

Naming

The minor planet is named in after German ARI-astronomer Joachim Schubart (born 1928), who is also a discoverer of minor planets, namely 2000 Herschel and 4724 Brocken. He studied in detail members of the Hilda family, as he developed an averaging techniques for observing the long-term motions of asteroids.[2] Schubart has also been an active member on several commissions of the International Astronomical Union.[48] The official naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 3937}}).[49]

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1911) Schubart |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 153 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1912 |chapter = (1911) Schubart }}
2. ^1 2 {{cite web |title = 1911 Schubart (1973 UD) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1911 |accessdate = 3 December 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 = 3 December 2017}}
4. ^1 {{cite web |title = Individual members: Joachim Schubart |work = IAU – International Astronomical Union |url = https://www.iau.org/administration/membership/individual/2296/ |accessdate = 5 December 2017}}
5. ^1 2 3 4 5 6 {{cite journal |display-authors = 6 |first1 = T. |last1 = Grav |first2 = A. K. |last2 = Mainzer |first3 = J. |last3 = Bauer |first4 = J. |last4 = Masiero |first5 = T. |last5 = Spahr |first6 = R. S. |last6 = McMillan |first7 = R. |last7 = Walker |first8 = R. |last8 = Cutri |first9 = E. |last9 = Wright |first10 = P. R. |last10 = Eisenhardt |first11 = E. |last11 = Blauvelt |first12 = E. |last12 = DeBaun |first13 = D. |last13 = Elsbury |first14 = T. |last14 = Gautier |first15 = S. |last15 = Gomillion |first16 = E. |last16 = Hand |first17 = A. |last17 = Wilkins |date = January 2012 |title = WISE/NEOWISE Observations of the Hilda Population: Preliminary Results |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...744..197G |journal = The Astrophysical Journal |volume = 744 |issue = 2 |page = 15 |bibcode = 2012ApJ...744..197G |doi = 10.1088/0004-637X/744/2/197 |arxiv = 1110.0283 |access-date= 3 December 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 = 3 December 2017}}
7. ^1 {{Cite book |first1 = D. |last1 = Nesvorný |first2 = M. |last2 = Broz |first3 = V. |last3 = Carruba |date = December 2014 |title = Identification and Dynamical Properties of Asteroid Families |journal = Asteroids IV |pages = 297–321 |bibcode = 2015aste.book..297N |doi = 10.2458/azu_uapress_9780816532131-ch016 |arxiv = 1502.01628 |isbn = 9780816532131 }}
8. ^1 {{citation |last1 = Brož | first1 = M. |last2 = Vokrouhlický | first2 = D. |arxiv = 1104.4004 |bibcode = 2008MNRAS.390..715B |date = October 2008 |title = Asteroid families in the first-order resonances with Jupiter |journal = Monthly Notices of the Royal Astronomical Society | volume = 390 | issue = 2 |pages = 715–732 |doi = 10.1111/j.1365-2966.2008.13764.x}}
9. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (1911) Schubart |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1911%7CSchubart |accessdate = 3 December 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 = 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 = 3 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 = }}
11. ^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= 3 December 2017}}
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 |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= 3 December 2017}}
13. ^1 2 {{Cite journal |author = Stephens, Robert D. |date = October 2016 |title = Asteroids Observed from CS3: 2016 April - June |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..336S |journal = The Minor Planet Bulletin |volume = 43 |issue = 4 |pages = 336–339 |issn = 1052-8091 |bibcode = 2016MPBu...43..336S |access-date= 3 December 2017}}
14. ^1 2 {{Cite journal |author = Warell, Johan |date = October 2017 |title = Lightcurve Observations of Nine Main-belt Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..304W |journal = The Minor Planet Bulletin |volume = 44 |issue = 4 |pages = 304–305 |issn = 1052-8091 |bibcode = 2017MPBu...44..304W |access-date= 3 December 2017}}
15. ^1 {{Cite journal |display-authors = 6 |first1 = M. |last1 = Dahlgren |first2 = J. F. |last2 = Lahulla |first3 = C.-I. |last3 = Lagerkvist |first4 = J. |last4 = Lagerros |first5 = S. |last5 = Mottola |first6 = A. |last6 = Erikson |first7 = M. |last7 = Gonano-Beurer |first8 = M. |last8 = Di Martino |date = June 1998 |title = A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..133..247D |journal = Icarus |volume = 133 |issue = 2 |pages = 247–285 |bibcode = 1998Icar..133..247D |doi = 10.1006/icar.1998.5919 |access-date= 3 December 2017}}
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}}

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 |1910 Mikhailov |number=1911 |1912 Anubis}}{{Small Solar System bodies}}{{DEFAULTSORT:Schubart}}

7 : Schubart asteroids|Hilda asteroids|Discoveries by Paul Wild (Swiss astronomer)|Minor planets named for people|Named minor planets|P-type asteroids (Tholen)|Astronomical objects discovered in 1973
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