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词条 4085 Weir
释义

  1. Orbit and classification

  2. Physical characteristics

      Rotation period    Diameter and albedo  

  3. Naming

  4. Notes

  5. References

  6. External links

{{Infobox planet
| minorplanet = yes
| name = 4085 Weir
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref =  
| discoverer = C. Shoemaker
| discovery_site = Palomar Obs.
| discovered = 13 May 1985
| mpc_name = (4085) Weir
| alt_names = 1985 JR{{·}}1981 JY
1982 XK
| pronounced =
| named_after = Doris Blackman Weir [2][3]
{{small|(American geologist)}}
| mp_category = main-belt{{·}}{{small|(middle)}} [4]
Eunomia [5]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 36.57 yr (13,356 days)
| aphelion = 2.8838 AU
| perihelion = 2.3288 AU
| semimajor = 2.6063 AU
| eccentricity = 0.1065
| period = 4.21 yr (1,537 days)
| mean_anomaly = 261.69°
| mean_motion = {{Deg2DMS|0.2342|sup=ms}} / day
| inclination = 14.220°
| asc_node = 68.681°
| arg_peri = 136.29°
| dimensions = {{val|9.221|0.241}} km[7]
{{val|9.579|0.048}} km[8]
{{val|9.66|0.77}} km[9]
11.30 km {{small|(calculated)}}[4]
| rotation = {{val|14.602|0.005}} h[11]{{efn|name=lightcurve-plot-Warner}}
{{val|14.657|0.0046}} h[12]
| albedo = 0.20 {{small|(assumed)}}[4]
{{val|0.228|0.038}}[9]
{{val|0.2334|0.0274}}[8]
{{val|0.273|0.060}}[7]
| spectral_type = S {{small|(Tholen)}}[4]
| abs_magnitude = {{val|12.025|0.001}} {{small|(R)}}[12]{{·}}12.1[4]{{·}}12.30[8][9]{{·}}{{val|12.38|0.22}}[23]
}}4085 Weir, provisional designation {{mp|1985 JR}}, is a stony Eunomian asteroid from the central regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 13 May 1985, by astronomer Carolyn Shoemaker at the Palomar Observatory in California, United States. The asteroid was named after American geologist Doris Blackman Weir.[2][3]

Orbit and classification

Weir is a member of the Eunomia family ({{small|502}}),[5] a prominent family of stony S-type asteroid and the largest one in the intermediate main belt with more than 5,000 members.[27]{{rp|23}} It orbits the Sun in the central main-belt at a distance of 2.3–2.9 AU once every 4 years and 3 months (1,537 days; semi-major axis of 2.61 AU). Its orbit has an eccentricity of 0.11 and an inclination of 14° with respect to the ecliptic.

The body's observation arc begins with its first observation as {{mp|1981 JY}} at Anderson Mesa Station in May 1981, or four years prior to its official discovery observation at Palomar.[2]

Physical characteristics

In the Tholen classification, Weir is a common, stony S-type asteroid,[4] which is also the overall spectral type for members of the Eunomia family.[27]{{rp|23}}

Rotation period

In May 2006, a rotational lightcurve of Weir was obtained from photometric observations by Brian Warner at his Palmer Divide Observatory in Colorado. Lightcurve analysis gave a rotation period of 14.602 hours with a brightness variation of 0.18 magnitude ({{small|U=2}}).[11]{{efn|name=lightcurve-plot-Warner}} A concurring period of 14.657 hours and an amplitude of 0.24 magnitude was measured by astronomers at the Palomar Transient Factory in May 2010 ({{small|U=2}}).[12]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Weir measures between 9.221 and 9.66 kilometers in diameter and its surface has an albedo between 0.228 and 0.273.[7][8][9]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 11.30 kilometers based on an absolute magnitude of 12.1.[4]

Naming

This minor planet was named after American planetary geologist with the United States Geological Survey, Doris Blackman Weir.[2][3] The approved naming citation was published by the Minor Planet Center on 12 December 1989 ({{small|M.P.C. 15576}}).[40]

Notes

{{notelist|refs={{efn|name=lightcurve-plot-Warner|1=Lightcurve plot of 4085 Weir, Palmer Divide Observatory, B. D. Warner (2006). Rotation period {{val|14.602|0.005}} hours with a brightness amplitude of {{val|0.18|0.02}} mag. Summary figures at the LCDB}}

}}

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (4085) Weir |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 349 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_4063 |chapter = (4085) Weir }}
2. ^1 2 3 4 {{cite web |title = 4085 Weir (1985 JR) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=4085 |accessdate = 8 January 2018}}
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 = 8 January 2018}}
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 |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 = 8 January 2018}}
6. ^1 2 {{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 }}
7. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (4085) Weir |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=4085%7CWeir |accessdate = 8 January 2018}}
8. ^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 }}
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= 8 January 2018}}
10. ^1 2 {{Cite journal |author = Warner, Brian D. |date = December 2006 |title = Asteroid lightcurve analysis at the Palmer Divide Observatory - March - June 2006 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2006MPBu...33...85W |journal = The Minor Planet Bulletin |volume = 33 |issue = 4 |pages = 85–88 |issn = 1052-8091 |bibcode = 2006MPBu...33...85W |access-date= 8 January 2018}}
11. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Adam |last1 = Waszczak |first2 = Chan-Kao |last2 = Chang |first3 = Eran O. |last3 = Ofek |first4 = Russ |last4 = Laher |first5 = Frank |last5 = Masci |first6 = David |last6 = Levitan |first7 = Jason |last7 = Surace |first8 = Yu-Chi |last8 = Cheng |first9 = Wing-Huen |last9 = Ip |first10 = Daisuke |last10 = Kinoshita |first11 = George |last11 = Helou |first12 = Thomas A. |last12 = Prince |first13 = Shrinivas |last13 = Kulkarni |date = September 2015 |title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W |journal = The Astronomical Journal |volume = 150 |issue = 3 |page = 35 |bibcode = 2015AJ....150...75W |doi = 10.1088/0004-6256/150/3/75 |arxiv = 1504.04041 |access-date= 8 January 2018}}
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= 8 January 2018}}
[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 |4084 Hollis |number=4085 |4086 Podalirius}}{{Small Solar System bodies}}{{DEFAULTSORT:Weir}}

5 : Eunomia asteroids|Discoveries by Carolyn S. Shoemaker|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1985
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