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词条 659 Nestor
释义

  1. Orbit and classification

  2. Naming

  3. Physical characteristics

      Diameter and albedo    Rotation period  

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 659 Nestor
| background = #C2FFFF
| image =
| caption =
| discovery_ref =  [1]
| discovered = 23 March 1908
| discoverer = M. F. Wolf
| discovery_site = Heidelberg Obs.
| mpc_name = (659) Nestor
| alt_names = 1908 CS{{·}}A914 WF
| pronounced = {{IPAc-en|ˈ|n|ɛ|s|t|ɔːr}}{{·}}{{Respell|NES|tor}}
| named_after = Nestor {{small|(Greek mythology)}}[2]
| mp_category = Jupiter trojan [1][5]
{{nowrap|Greek [6][7]{{·}}background [7]}}
| orbit_ref =  
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 110.17 yr (40,238 d)
| aphelion = 5.7800 AU
| perihelion = 4.5604 AU
| semimajor = 5.1702 AU
| eccentricity = 0.1179
| period = 11.76 yr (4,294 d)
| mean_anomaly = 308.33°
| mean_motion = {{Deg2DMS|0.0838|sup=ms}} / day
| inclination = 4.5206°
| asc_node = 350.78°
| arg_peri = 342.74°
| jupiter_moid = 0.3165 AU
| tisserand = 2.9800
| dimensions = {{val|109|x|109|ul=km}}[10][11]
| mean_diameter = {{val|107.06|4.33|u=km}}[12]
{{val|108.87|4.5|u=km}}[13]
{{val|112.32|1.85|u=km}}[14]
| rotation = {{val|15.98|0.03|u=h}}[15]
| albedo = {{val|0.035|0.008}}[14]
{{val|0.0378|0.003}}[13]
{{val|0.040|0.004}}[12]
| spectral_type = XC {{small|(Tholen)}}
C0 {{small|(Barucci)}}[10]
U–B {{=}} {{val|0.249|058}}
B–V {{=}} {{val|0.719|034}}
V–I {{=}} {{val|0.790|0.039}}[5]
BR {{=}} {{val|1.410|0.068}}[5]
| abs_magnitude = 8.99[1][12][13][14]
}}659 Nestor ({{IPAc-en|ˈ|n|ɛ|s|t|ɔːr}} {{Respell|NES|tor}}), provisional designation {{mp|1908 CS}}, is a dark Jupiter trojan from the Greek camp, approximately {{convert|110|km|mi|abbr=off|sp=us}} in diameter. It was discovered on 23 March 1908, by German astronomer Max Wolf at Heidelberg Observatory in southern Germany, and named after King Nestor from Greek mythology.[1][2] The carbonaceous Jovian asteroid belongs to the 20 largest Jupiter trojans and has a rotation period of 15.98 hours.[5]

Orbit and classification

Nestor is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's {{L4}} Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.[7][10]

It orbits the Sun at a distance of 4.6–5.8 AU once every 11 years and 9 months (4,294 days; semi-major axis of 5.17 AU). Its orbit has an eccentricity of 0.12 and an inclination of 5° with respect to the ecliptic. As no precoveries were taken, the body's observation arc begins with its official discovery observation at Heidelberg in March 1908.[1]

Naming

This minor planet was named from Greek mythology after Nestor, the king of Pylos.[2] He was an Argonaut and counselor to the Greeks at Troy. Nestor fought against the centaurs and participated in the hunt for the Calydonian Boar. The asteroid was named by the German Astronomische Gesellschaft during a meeting at Breslau in 1910.[2]

Physical characteristics

In the Barucci classification, Nestor is classified as a carbonaceous C-type asteroid (C0), while in the Tholen taxonomy, its spectral type is ambiguous, closest to an X-type and somewhat similar to that of a C-type (XC).[10] In the Lightcurve Data Base it is assumed to be a primitive P-type.[5] Its V–I color index of 0.79 is unusually low for most Jovian asteroids (typically above 0.9).[5]

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, Nestor measures between 107.06 and 112.32 kilometers in diameter and its surface has an albedo between 0.035 and 0.040.[12][13][14] The Collaborative Asteroid Lightcurve Link an albedo of and a diameter of kilometers based on an absolute magnitude of 8.99.[5]

On 30 June 2006, a dimensional estimate was also obtained from an occultation event by David Gault, when the asteroid eclipsed the star "TYC 6854-00630" (as designated in the Tycho Catalogue) for a duration of 9.52 seconds. Based on this time period, a cross section with the minor and major occultation axes at {{val|109|x|109}} kilometers was inferred. The quality rating is 1 ("no fit").[10][11]

{{Largest Jupiter trojans}}

Rotation period

In January 1988, a first rotational lightcurve of Nestor was obtained from photometric observations by MIT-astronomer Richard P. Binzel showing a rotation period of {{val|15.1}} hours ({{small|U=2}}).[48]

In August 1995, Italian astronomer Stefano Mottola observed the asteroid with the Bochum 0.61-metre Telescope at ESO's La Silla Observatory, Chile, and derived a period of {{val|15.98|0.03}} hours with a brightness variation of {{val|0.31|0.01}} magnitude ({{small|U=3}}).[15]

In January and February 2014, two lightcurves in the R-band were obtained at the Palomar Transient Factory, California. Lightcurve analysis gave two concurring periods of {{val|15.9667|0.0094}} and {{val|16.000|0.260}} hours with an amplitude of 0.24 and 0.22, respectively ({{small|U=2/2}}).[50][51]

References

1. ^1 2 3 4 {{cite book |title = Dictionary of Minor Planet Names – (659) Nestor |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 65 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_660 |chapter = (659) Nestor }}
2. ^1 2 3 4 5 {{cite web |title = 659 Nestor (1908 CS) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=659 |accessdate = 12 June 2018}}
3. ^1 {{cite web |title = List of Jupiter Trojans |work = Minor Planet Center |date = 30 May 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 5 June 2018}}
4. ^1 2 3 4 {{cite journal |first1 = T. |last1 = Grav |first2 = A. K. |last2 = Mainzer |first3 = J. M. |last3 = Bauer |first4 = J. R. |last4 = Masiero |first5 = C. R. |last5 = Nugent |date = November 2012 |title = WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy |journal = The Astrophysical Journal |volume = 759 |issue = 1 |page = 10 |bibcode = 2012ApJ...759...49G |doi = 10.1088/0004-637X/759/1/49 |arxiv = 1209.1549 }} (online catalog)
5. ^1 2 3 {{cite web |title = Asteroid (659) Nestor – Proper elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=659&pc=1.1.6 |accessdate = 5 June 2018}}
6. ^1 2 3 4 5 {{cite web |title = Asteroid 659 Nestor |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=659+Nestor |accessdate = 12 June 2018}}
7. ^1 2 {{cite web |title = Occultation of TYC 6854-00630-1 by (659) Nestor in 30 June 2006 |work = The Royal Astronomical Society of New Zealand – Occultation Section |url = http://www.occultations.org.nz/planet/2006/results/060630_Nestor.htm |accessdate = 12 June 2018}}
8. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (659) Nestor |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=659%7CNestor |accessdate = 12 June 2018}}
9. ^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://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |journal = NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0 |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |accessdate = 15 June 2018}}
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 June 2018}} (online, [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])
11. ^1 {{Cite journal |first1 = Richard P. |last1 = Binzel |first2 = Linda M. |last2 = Sauter |date = February 1992 |title = Trojan, Hilda, and Cybele asteroids - New lightcurve observations and analysis |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1992Icar...95..222B |journal = Icarus |volume = 95 |issue = 2 |pages = 222–238 |issn = 0019-1035 |bibcode = 1992Icar...95..222B |doi = 10.1016/0019-1035(92)90039-A |access-date= 12 June 2018}}
12. ^1 2 {{cite journal |display-authors = 6 |first1 = Stefano |last1 = Mottola |first2 = Mario |last2 = Di Martino |first3 = Anders |last3 = Erikson |first4 = Maria |last4 = Gonano-Beurer |first5 = Albino |last5 = Carbognani |first6 = Uri |last6 = Carsenty |first7 = Gerhard |last7 = Hahn |first8 = Hans-Josef |last8 = Schober |first9 = Felix |last9 = Lahulla |first10 = Marco |last10 = Delbò |first11 = Claes-Ingvar |last11 = Lagerkvist |date = May 2011 |title = Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects |journal = The Astronomical Journal |volume = 141 |issue = 5 |page = 32 |bibcode = 2011AJ....141..170M |doi = 10.1088/0004-6256/141/5/170 }}
13. ^1 {{cite journal |display-authors = 6 |first1 = Chan-Kao |last1 = Chang |first2 = Wing-Huen |last2 = Ip |first3 = Hsing-Wen |last3 = Lin |first4 = Yu-Chi |last4 = Cheng |first5 = Chow-Choong |last5 = Ngeow |first6 = Ting-Chang |last6 = Yang |first7 = Adam |last7 = Waszczak |first8 = Shrinivas R. |last8 = Kulkarni |first9 = David |last9 = Levitan |first10 = Branimir |last10 = Sesar |first11 = Russ |last11 = Laher |first12 = Jason |last12 = Surace |first13 = Thomas. A. |last13 = Prince |date = August 2015 |title = Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJS..219...27C |journal = The Astrophysical Journal Supplement Series |volume = 219 |issue = 2 |page = 19 |bibcode = 2015ApJS..219...27C |doi = 10.1088/0067-0049/219/2/27 |arxiv = 1506.08493 |access-date= 18 August 2016}}
14. ^1 {{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 |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 }}
[1][2][3][4][5][6][7][8][9][10][11][12][13][14]

}}

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 (1)-(5000) – Minor Planet Center
  • {{AstDys|659}}
  • {{JPL small body}}
{{Use dmy dates|date=June 2018}}{{Minor planets navigator |658 Asteria |number=659 |660 Crescentia}}{{Small Solar System bodies}}{{DEFAULTSORT:Nestor}}

6 : Jupiter trojans (Greek camp)|Discoveries by Max Wolf|Minor planets named from Greek mythology|Named minor planets|XC-type asteroids (Tholen)|Astronomical objects discovered in 1908
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