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词条 1870 Glaukos
释义

  1. Discovery

  2. Orbit and classification

  3. Physical characteristics

      Lightcurves    Diameter and albedo  

  4. Naming

  5. Notes

  6. References

  7. External links

{{Infobox planet
| minorplanet = yes
| name = 1870 Glaukos
| background = #C2FFFF
| image =
| image_size =
| caption =
| discovery_ref =  [1]
| discovered = 24 March 1971
| discoverer = C. J. van Houten
I. van Houten-G.
T. Gehrels
| discovery_site = Palomar Obs.
| mpc_name = (1870) Glaukos
| alt_names = 1971 FE{{·}}1976 SM
| pronounced = {{IPAc-en|ˈ|ɡ|l|ɔː|k|ə|s}}{{·}}{{respell|GLAW|kəs}}
| named_after = Glaucus
{{small|(Greek mythology)}}[2]
| mp_category = Jupiter trojan [1]
{{nowrap|Trojan [5]{{·}}background [6]}}
| orbit_ref =  
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 62.50 yr (22,827 d)
| aphelion = 5.4155 AU
| perihelion = 5.0765 AU
| semimajor = 5.2460 AU
| eccentricity = 0.0323
| period = 12.02 yr (4,389 d)
| mean_anomaly = 215.92°
| mean_motion = {{Deg2DMS|0.0820|sup=ms}} / day
| inclination = 6.5763°
| asc_node = 176.30°
| arg_peri = 129.91°
| jupiter_moid = 0.1272 AU
| tisserand = 2.9860
| mean_diameter = {{val|47.65|0.77|ul=km}}[8]
| rotation = {{val|5.986|0.003|ul=h}}[9]{{efn|name=lightcurve-plots-CS3}}
| albedo = {{val|0.049|0.007}}[8]
| spectral_type = D {{small|(Pan-STARRS)}}[11][12]
D {{small|(SDSS-MOC)}}[13][14]
| abs_magnitude = 10.5[8]
10.6[1][11]
}}1870 Glaukos ({{IPAc-en|ˈ|ɡ|l|ɔː|k|ə|s}} {{respell|GLAW|kəs}}), provisional designation {{mp|1971 FE}}, is a mid-sized Jupiter trojan from the Trojan camp, approximately {{convert|47|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. Discovered during the first Palomar–Leiden Trojan survey in 1971, it was later named for Glaucus from Greek mythology.[1] The dark D-type asteroid has a rotation period of 6.0 hours.[11]

Discovery

Glaukos was discovered on 24 March 1971, by Dutch astronomer couple Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by astronomer Tom Gehrels at the Californian Palomar Observatory in California.[1] The body's observation arc begins with a precovery of its first recorded observation at Palomar in November 1955, or more than 15 years prior to its official discovery observation.[1]

This discovery was made in the context of a larger survey of faint Trojans. The trio of Dutch and Dutch–American astronomers also collaborated on the productive Palomar–Leiden survey in the 1960s, using the same procedure as for this (smaller) survey: Tom Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis and Ingrid van Houten at Leiden Observatory where astrometry was carried out.

More than 7000 Jupiter trojans have already been discovered.[5]

Orbit and classification

Glaukos is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's {{L5}} Lagrangian point, 60° behind its orbit {{cross reference|(see Trojans in astronomy)}}.[5] It is also a non-family asteroid of the Jovian background population.[6] It orbits the Sun at a distance of 5.1–5.4 AU once every 12.02 years (4,389 days; semi-major axis of 5.25 AU). Its orbit has an eccentricity of 0.03 and an inclination of 7° with respect to the ecliptic.

Physical characteristics

Glaukos has been characterized as a dark D-type asteroid by PanSTARRS{{'}} photometric survey as well as in the SDSS-based taxonomy.[11][12][13][14] It is the most common spectral type among the Jupiter trojans.

Lightcurves

In 2012 and 2013, three rotational lightcurves of Glaukos in the R- and S-band were obtained by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 5.979, 5.980 and 5.989 hours with an amplitude between 0.27 and 0.37 magnitude ({{small|U=2/2/2}}).[11][32]

In October 2013, photometric observations by American astronomer Robert Stephens at the Center for Solar System Studies gave the so-far best rated lightcurve, with a period of {{val|5.986|0.003}} hours and a brightness variation of 0.42 magnitude ({{small|U=3}}).[9]{{efn|name=lightcurve-plots-CS3}}

Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Glaukos measures 47.65 kilometers in diameter, and its surface has an albedo of 0.049,[8] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 42.23 kilometers with an absolute magnitude of 10.6.[11]

{{Largest Jupiter trojans}}

Naming

This minor planet was named after Glaucus (Glaukos) from Greek mythology. In Homer's Iliad, he was captain in the Lycian contingent during the Trojan War. and was killed by Ajax, after whom the Jovian asteroid 1404 Ajax is named.[2] The official naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 3826}}).[37]

Notes

{{notelist|refs{{efn|name=lightcurve-plots-CS3|1=Lightcurve plots of (1870) Glaukos from Oct 2013 by Robert Stephens at the Center for Solar System Studies {{Obscode|U80}}. Quality code is 3 (lightcurve rating at CS3). Summary figures at the LCDB and CS3.}}

}}

References

1. ^1 2 {{cite book |title = Dictionary of Minor Planet Names – (1870) Glaukos |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 150 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1871 |chapter = (1870) Glaukos }}
2. ^1 2 3 4 5 6 {{cite web |title = 1870 Glaukos (1971 FE) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1870 |accessdate = 21 June 2018}}
3. ^1 2 3 {{cite web |title = List of Jupiter Trojans |work = Minor Planet Center |first3 = V. |last3 = Carruba |date = 1 June 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 21 June 2018}}
4. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 21 June 2018}}
5. ^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 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759...49G |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 |access-date= 21 June 2018}} (online catalog)
6. ^1 2 {{cite web |title = Asteroid (1870) Glaukos – Proper Elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=1870&pc=1.1.6 |access-date= 21 June 2018}}
7. ^1 2 {{cite web |title = Asteroid 1870 Glaukos |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1870+Glaukos |accessdate = 21 June 2018}}
8. ^1 2 {{Cite journal |first1 = J. M. |last1 = Carvano |first2 = P. H. |last2 = Hasselmann |first3 = D. |last3 = Lazzaro |first4 = T. |last4 = Mothé-Diniz |date = February 2010 |title = SDSS-based taxonomic classification and orbital distribution of main belt asteroids |url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_I0035_5_SDSSTAX_V1_1/data/sdsstax_ast_table.tab |journal = Astronomy and Astrophysics |volume = 510 |page = 12 |bibcode = 2010A&A...510A..43C |doi = 10.1051/0004-6361/200913322 |access-date= 21 June 2018}}
9. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (1870) Glaukos |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1870%7CGlaukos |accessdate = 21 June 2018}}
10. ^1 2 {{Cite journal |first1 = Robert D. |last1 = Stephens |first2 = Linda M. |last2 = French |first3 = Chelsea |last3 = Davitt |first4 = Daniel R. |last4 = Coley |date = April 2014 |title = At the Scaean Gates: Observations Jovian Trojan Asteroids, July- December 2013 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41...95S |journal = The Minor Planet Bulletin |volume = 41 |issue = 2 |pages = 95–100 |issn = 1052-8091 |bibcode = 2014MPBu...41...95S |access-date= 21 June 2018}}
11. ^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 }}
12. ^1 2 {{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][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
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • {{AstDys|1870}}
  • {{JPL small body}}
{{Use dmy dates|date=June 2018}}{{Minor planets navigator |1869 Philoctetes |number=1870| 1871 Astyanax}}{{Small Solar System bodies}}{{DEFAULTSORT:Glaukos}}

7 : Jupiter trojans (Trojan camp)|Discoveries by Cornelis Johannes van Houten|Discoveries by Ingrid van Houten-Groeneveld|Discoveries by Tom Gehrels|Minor planets named from Greek mythology|Named minor planets|Astronomical objects discovered in 1971
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