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词条 5542 Moffatt
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 = 5542 Moffatt
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref =  [1]
| discoverer = Perth Obs.
| discovery_site = Perth Obs.
| discovered = 6 August 1978
| mpc_name = (5542) Moffatt
| alt_names = {{mp|1978 PT|4}}{{·}}1986 LL
| pronounced =
| named_after = Ethelwin Moffatt
{{small|(Australian philanthropist)}}
| mp_category = main-belt [1]{{·}}{{small|(middle)}}
{{nowrap|Maria [4][5]{{·}}Eunomia [6]}}
| orbit_ref =  
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 39.71 yr (14,505 d)
| aphelion = 3.0022 AU
| perihelion = 2.1727 AU
| semimajor = 2.5874 AU
| eccentricity = 0.1603
| period = 4.16 yr (1,520 d)
| mean_anomaly = 128.69°
| mean_motion = {{Deg2DMS|0.2368|sup=ms}} / day
| inclination = 15.877°
| asc_node = 116.56°
| arg_peri = 263.20°
| mean_diameter = {{val|8.597|0.183|ul=km}}[8][9]
{{val|10.06|u=km}} {{small|(calculated)}}[6]
| rotation = {{val|5.187|0.001|ul=h}}[11]
{{val|5.195|u=h}}[12]
| albedo = {{val|0.21}} {{small|(assumed)}}[6]
{{val|0.345|0.055}}[8][9]
| spectral_type = S {{small|(assumed)}}[6]
| abs_magnitude = 12.1[9]
12.3[6]
{{val|12.67|0.25}}[20]
}}5542 Moffatt, provisional designation {{mp|1978 PT|4}}, is a Marian asteroid from the central regions of the asteroid belt, approximately {{convert|9|km|mi|abbr=off|sigfig=1|sp=us}} in diameter. It was discovered on 6 August 1978, by astronomers at the Perth Observatory in Bickley, Australia.[1] The likely S-type asteroid has a rotation period of 5.19 hours.[6] It was named for Australian Ethelwin Moffatt, a benefactor of the discovering observatory.[1]

Orbit and classification

Moffatt is a core member of the Maria family ({{small|506}}),[4][12] a large intermediate belt family of stony asteroids.[26] Alternatively, it has also been assigned to the stony Eunomia family ({{small|502}}), one of the most prominent families in the intermediate main belt with more than 5,000 members.[6]

It orbits the Sun in the central main-belt at a distance of 2.2–3.0 AU once every 4 years and 2 months (1,520 days; semi-major axis of 2.59 AU). Its orbit has an eccentricity of 0.16 and an inclination of 16° with respect to the ecliptic. The body's observation arc begins with its first observation at Palomar Observatory in July 1978, a month prior to its official discovery observation at Bickley.[1]

Physical characteristics

Moffatt is an assumed stony S-type asteroid.[6]

Rotation period

In November 2011, a rotational lightcurve of Moffatt was obtained from photometric observations by Chinese astronomers using the SARA telescopes {{Obscode|G82}} of the Southeastern Association for Research in Astronomy at Kitt Peak and CTIO. Lightcurve analysis gave a rotation period of 5.187 hours and a brightness variation of 0.12 magnitude ({{small|U=2+}}).[11] This supersedes a previous result from a fragmentary lightcurve by {{MoMP|20657|Alvaro Alvarez-Candal}} that gave a period of 5.195 hours with an amplitude of 0.27 magnitude ({{small|U=1}}).[12]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Moffatt measures 8.597 kilometers in diameter and its surface has a high albedo of 0.345.[8][9] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the parent body of the Eunomia family – and calculates a diameter of 10.06 kilometers based on an absolute magnitude of 12.3.[6]

Naming

This minor planet was named after Australian Ethelwin Moffatt (née Winzar, born 1926), a benefactor of the discovering Perth Observatory and a direct descendant of John Flamsteed (1646–1719), the first Astronomer Royal. The official naming citation was published by the Minor Planet Center on 2 September 2001 ({{small|M.P.C. 43380}}).[36]

References

1. ^1 2 3 4 5 {{cite web |title = 5542 Moffatt (1978 PT4) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=5542 |accessdate = 23 May 2018}}
2. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 23 May 2018}}
3. ^1 2 3 {{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 = J. |last6 = Dailey |first7 = P. R. M. |last7 = Eisenhardt |first8 = R. S. |last8 = McMillan |first9 = T. B. |last9 = Spahr |first10 = M. F. |last10 = Skrutskie |first11 = D. |last11 = Tholen |first12 = R. G. |last12 = Walker |first13 = E. L. |last13 = Wright |first14 = E. |last14 = DeBaun |first15 = D. |last15 = Elsbury |first16 = T., IV |last16 = Gautier |first17 = S. |last17 = Gomillion |first18 = A. |last18 = Wilkins |date = November 2011 |title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 20 |bibcode = 2011ApJ...741...68M |doi = 10.1088/0004-637X/741/2/68 |arxiv = 1109.4096 }}
4. ^1 {{Cite journal |first1 = Alvaro |last1 = Alvarez-Candal |first2 = René |last2 = Duffard |first3 = Cláudia A. |last3 = Angeli |first4 = Daniela |last4 = Lazzaro |first5 = Silvia |last5 = Fernández |date = December 2004 |title = Rotational lightcurves of asteroids belonging to families |journal = Icarus |volume = 172 |issue = 2 |pages = 388–401 |bibcode = 2004Icar..172..388A |doi = 10.1016/j.icarus.2004.06.008 }}
5. ^1 2 {{cite web |title = Asteroid 5542 Moffatt |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=5542+Moffatt |accessdate = 23 May 2018}}
6. ^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 }}
7. ^1 2 3 4 5 6 7 8 9 {{cite web |title = LCDB Data for (5542) Moffatt |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=5542%7CMoffatt |accessdate = 23 May 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 }} (catalog)
9. ^1 2 {{Cite journal |display-authors = 6 |first1 = Xianming L. |last1 = Han |first2 = Bin |last2 = Li |first3 = Haibin |last3 = Zhao |first4 = Wenjuan |last4 = Liu |first5 = Luming |last5 = Sun |first6 = Jingjing |last6 = Shi |first7 = Shan |last7 = Gao |first8 = Shufen |last8 = Wang |first9 = Xiang |last9 = Pan |first10 = Peng |last10 = Jiang |first11 = Hongyan |last11 = Zhou |date = April 2013 |title = Photometric Observations of 782 Montefiore, 3842 Harlansmith 5542 Moffatt, 6720 Gifu, and (19979) 1989 VJ |journal = The Minor Planet Bulletin |volume = 40 |issue = 2 |pages = 99–100 |issn = 1052-8091 |bibcode = 2013MPBu...40...99H }}
10. ^1 2 3 {{Cite journal |first1 = Alvaro |last1 = Alvarez-Candal |first2 = René |last2 = Duffard |first3 = Cláudia A. |last3 = Angeli |first4 = Daniela |last4 = Lazzaro |first5 = Silvia |last5 = Fernández |date = December 2004 |title = Rotational lightcurves of asteroids belonging to families |journal = Icarus |volume = 172 |issue = 2 |pages = 388–401 |bibcode = 2004Icar..172..388A |doi = 10.1016/j.icarus.2004.06.008 }}
11. ^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 |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 }}
[1][2][3][4][5][6][7][8][9][10][11]

}}

External links

  • Asteroid Lightcurve Database (LCDB), query form (info)
  • [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
  • Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
  • {{AstDys|5542}}
  • {{JPL small body}}
{{Use dmy dates|date=May 2018}}{{Minor planets navigator |5541 Seimei |number=5542 |5543 Sharaf}}{{Small Solar System bodies}}{{DEFAULTSORT:Moffatt}}

5 : Maria asteroids|Discoveries by the Perth Observatory|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1978
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