“3801 Thrasymedes”的意思、由来-开放百科全书

The body's observation arc begins with a precovery taken at Palomar Observatory in April 1954, more than 31 years prior to its official discovery observation at Kitt Peak.^[1]

Asteroid pair

In 1993, Andrea Milani suggested that Thrasymedes forms an asteroid pair with 1583 Antilochus, using the hierarchical clustering method (HCM), which looks for groupings of neighboring asteroids based on the smallest distances between them in the proper orbital element space.^[21] Asteroid pairs, which at some point in the past had very small relative velocities, are typically formed by a collisional break-up of a parent body. Alternatively, they may have been former binary asteroids which became gravitationally unbound and are now following similar but different orbits around the Sun.^[22]

The astronomer describes the finding as statistically significant though difficult to account for by a regular collisional event.^[21]{{efn|name=Milani-trojan-family}} The Antilochus–Thrasymedes pair is not listed at the Johnston's archive.^[22]

Physical characteristics

Rotation period

The first two fragmentary rotational lightcurves of Thrasymedes, taken before 2015, gave a rotation period of 9.60 and 16.02 hours, respectively ({{small|U=1/2-}}).^[26]^[27]

In 2015, photometric observations by the Kepler space telescope gave two lightcurves. The best-rated one showed a period of {{val|20.270|0.672}} hours and a brightness variation of 0.14 magnitude ({{small|U=2/2-}}).^[9]^[29] In June 2016, another period determination from 16 nights of observation by Robert Stephens at the Center for Solar System Studies in California gave a divergent {{val|49.55|0.02}} hours with a notably large amplitude of 1.07 magnitude ({{small|U=2}}).^[11]{{efn|name=lcdb-Stephens-2016}}

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Thrasymedes measures 34.28 kilometers in diameter and its surface has an albedo of 0.066,^[8] while he Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 35.12 kilometers based on an absolute magnitude of 11.0.^[11]

Naming

This minor planet was named after the Greek warrior Thrasymedes, commander of 15 ships to Troy. He is the son of Nestor and brother of Antilochus, who was killed during a fight with Memnon. He was also one of the 30 warriors to enter the wooden Trojan Horse.^[1]

The official naming citation was published by the Minor Planet Center on 31 May 1988 ({{small|M.P.C. 13179}}).^[34] The citation also mentions that this Jovian asteroids may have a common origin with 1583 Antilochus, because their orbits are very similar.

Notes

References

1. ^¹²³⁴⁵⁶⁷⁸{{cite web |title = 3801 Thrasymedes (1985 VS) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=3801 |accessdate = 21 June 2018}}
2. ^¹{{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}}
3. ^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}}
4. ^¹²³⁴{{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)
5. ^¹²{{cite web |title = Asteroid (3801) Thrasymedes – Proper Elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=3801&pc=1.1.6 |access-date= 21 June 2018}}
6. ^¹²{{Cite journal |author = Milani, Andrea |date = October 1993 |title = The Trojan asteroid belt: Proper elements, stability, chaos and families |url = http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1993CeMDA..57...59M&data_type=PDF_HIGH |journal = Celestial Mechanics and Dynamical Astronomy |volume = 57 |pages = 59–94 |issn = 0923-2958 |bibcode = 1993CeMDA..57...59M |doi = 10.1007/BF00692462 |access-date= 30 June 2018}}
7. ^¹²{{cite web |title = Asteroid pairs and clusters |work = Johnston's Archive |date = 29 April 2018 |author = Johnston, Wm. Robert |url = http://www.johnstonsarchive.net/astro/asteroidpairs.html |accessdate = 30 June 2018}}
8. ^¹²³⁴⁵{{cite web |title = LCDB Data for (3801) Thrasymedes |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=3801%7CThrasymedes |accessdate = 21 June 2018}}
9. ^¹{{Cite journal |first1 = R. D. |last1 = Duffard |first2 = M. |last2 = Melita |first3 = J. L. |last3 = Ortiz |first4 = J. |last4 = Licandro |first5 = I. P. |last5 = Williams |first6 = D. |last6 = Jones |date = December 2007 |title = Light-Curve Survey of the Trojan Asteroids |url = https://www.lpi.usra.edu/meetings/acm2008/pdf/8187.pdf |journal = Asteroids |bibcode = 2008LPICo1405.8187D |access-date= 5 July 2018}}
10. ^¹{{Cite journal |first1 = M. D. |last1 = Melita |first2 = R. |last2 = Duffard |first3 = I. P. |last3 = Williams |first4 = D. C. |last4 = Jones |first5 = J. |last5 = Licandro |first6 = J. L. |last6 = Ortiz |date = June 2010 |title = Lightcurves of 6 Jupiter Trojan asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010P&SS...58.1035M |journal = Planetary and Space Science |volume = 58 |issue = 7-8 |pages = 1035–1039 |bibcode = 2010P&SS...58.1035M |doi = 10.1016/j.pss.2010.03.009 |access-date= 21 June 2018}}
11. ^¹{{Cite journal |first1 = Erin Lee |last1 = Ryan |first2 = Benjamin N. L. |last2 = Sharkey |first3 = Charles E. |last3 = Woodward |date = March 2017 |title = Trojan Asteroids in the Kepler Campaign 6 Field |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017AJ....153..116R |journal = The Astronomical Journal |volume = 153 |issue = 3 |page = 12 |bibcode = 2017AJ....153..116R |doi = 10.3847/1538-3881/153/3/116 |access-date= 21 June 2018}}
12. ^¹²{{Cite journal |display-authors = 6 |first1 = Gy. M. |last1 = Szabó |first2 = A. |last2 = Pál |first3 = Cs. |last3 = Kiss |first4 = L. L. |last4 = Kiss |first5 = L. |last5 = Molnár |first6 = O. |last6 = Hanyecz |first7 = E. |last7 = Plachy |first8 = K. |last8 = Sárneczky |first9 = R. |last9 = Szabó |date = March 2017 |title = The heart of the swarm: K2 photometry and rotational characteristics of 56 Jovian Trojan asteroids |url = https://arxiv.org/pdf/1609.02760.pdf |journal = Astronomy and Astrophysics |volume = 599 |page = 13 |bibcode = 2017A&A...599A..44S |doi = 10.1051/0004-6361/201629401 |arxiv = 1609.02760 |access-date= 21 June 2018}}

词条	3801 Thrasymedes
释义	Orbit and classification Asteroid pair Physical characteristics Rotation period Diameter and albedo Naming Notes References External links {{Infobox planet \| minorplanet = yes \| name = 3801 Thrasymedes \| background = #C2FFFF \| image = \| image_size = \| caption = \| discovery_ref = ^[1] \| discoverer = Spacewatch \| discovery_site = Kitt Peak National Obs. \| discovered = 6 November 1985 \| mpc_name = (3801) Thrasymedes \| alt_names = 1985 VS \| pronounced = {{IPAc-en\|ˌ\|θ\|r\|æ\|s\|ᵻ\|ˈ\|m\|iː\|d\|iː\|z}} {{Respell\|THRAS\|ə\|MEE\|deez}} \| named_after = Thrasymedes ^[1] {{small\|(Greek mythology)}} \| mp_category = Jupiter trojan ^[1] {{nowrap\|Greek ^[5]{{·}}background ^[6]}} \| orbit_ref = \| epoch = 23 March 2018 (JD 2458200.5) \| uncertainty = 0 \| observation_arc = 63.25 yr (23,102 d) \| aphelion = 5.4436 AU \| perihelion = 5.2033 AU \| semimajor = 5.3234 AU \| eccentricity = 0.0226 \| period = 12.28 yr (4,486 d) \| mean_anomaly = 230.75° \| mean_motion = {{Deg2DMS\|0.0802\|sup=ms}} / day \| inclination = 28.496° \| asc_node = 209.47° \| arg_peri = 204.93° \| jupiter_moid = 0.0096 AU \| tisserand = 2.7550 \| mean_diameter = {{val\|34.28\|0.42\|ul=km}}^[8] \| rotation = {{val\|20.270\|0.672\|ul=h}}^[9] \| albedo = {{val\|0.066\|0.015}}^[8] \| spectral_type = C {{small\|(assumed)}}^[11] \| abs_magnitude = 10.9^[8] 11.0^[1]^[11] }}3801 Thrasymedes ({{IPAc-en\|ˌ\|θ\|r\|æ\|s\|ᵻ\|ˈ\|m\|iː\|d\|iː\|z}} {{Respell\|THRAS\|ə\|MEE\|deez}}), provisional designation {{mp\|1985 VS}}, is a mid-sized Jupiter trojan from the Greek camp, approximately {{convert\|34\|km\|mi\|abbr=off\|sigfig=2\|sp=us}} in diameter. It was discovered on 6 November 1985, by astronomers with the Spacewatch survey at the Kitt Peak National Observatory in Arizona, United States.^[1] The dark Jovian asteroid has a rotation period of 20.3 hours and forms an asteroid pair with 1583 Antilochus. It was named after Thrasymedes from Greek mythology.^[1] Orbit and classification Thrasymedes is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's {{L4}} Lagrangian point, 60° ahead on its orbit {{cross reference\|(see Trojans in astronomy)}}. It is also a non-family asteroid of the Jovian background population.^[6] It orbits the Sun at a distance of 5.2–5.4 AU once every 12 years and 3 months (4,486 days; semi-major axis of 5.32 AU). Its orbit has an eccentricity of 0.02 and an inclination of 28° with respect to the ecliptic. The body's observation arc begins with a precovery taken at Palomar Observatory in April 1954, more than 31 years prior to its official discovery observation at Kitt Peak.^[1] Asteroid pair In 1993, Andrea Milani suggested that Thrasymedes forms an asteroid pair with 1583 Antilochus, using the hierarchical clustering method (HCM), which looks for groupings of neighboring asteroids based on the smallest distances between them in the proper orbital element space.^[21] Asteroid pairs, which at some point in the past had very small relative velocities, are typically formed by a collisional break-up of a parent body. Alternatively, they may have been former binary asteroids which became gravitationally unbound and are now following similar but different orbits around the Sun.^[22] The astronomer describes the finding as statistically significant though difficult to account for by a regular collisional event.^[21]{{efn\|name=Milani-trojan-family}} The Antilochus–Thrasymedes pair is not listed at the Johnston's archive.^[22] Physical characteristics Thrasymedes is an assumed, carbonaceous C-type asteroid, while the majority of larger Jupiter trojans are D-type asteroids.^[11] Rotation period The first two fragmentary rotational lightcurves of Thrasymedes, taken before 2015, gave a rotation period of 9.60 and 16.02 hours, respectively ({{small\|U=1/2-}}).^[26]^[27] In 2015, photometric observations by the Kepler space telescope gave two lightcurves. The best-rated one showed a period of {{val\|20.270\|0.672}} hours and a brightness variation of 0.14 magnitude ({{small\|U=2/2-}}).^[9]^[29] In June 2016, another period determination from 16 nights of observation by Robert Stephens at the Center for Solar System Studies in California gave a divergent {{val\|49.55\|0.02}} hours with a notably large amplitude of 1.07 magnitude ({{small\|U=2}}).^[11]{{efn\|name=lcdb-Stephens-2016}} Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Thrasymedes measures 34.28 kilometers in diameter and its surface has an albedo of 0.066,^[8] while he Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 35.12 kilometers based on an absolute magnitude of 11.0.^[11] {{Largest Jupiter trojans}} Naming This minor planet was named after the Greek warrior Thrasymedes, commander of 15 ships to Troy. He is the son of Nestor and brother of Antilochus, who was killed during a fight with Memnon. He was also one of the 30 warriors to enter the wooden Trojan Horse.^[1] The official naming citation was published by the Minor Planet Center on 31 May 1988 ({{small\|M.P.C. 13179}}).^[34] The citation also mentions that this Jovian asteroids may have a common origin with 1583 Antilochus, because their orbits are very similar. Notes {{notelist\|refs={{efn\|name=Milani-trojan-family\|1=Besides the asteroid pair Antilochus—Thrasymedes, Milani found five potential asteroid families in the Greek camp, clustered around the Jovian asteroids 1437 Diomedes, 1647 Menelaus, 2456 Palamedes, 2797 Teucer and {{mpl\|(4035) 1986 WD}} (Milani 1993, p. 94).}}{{efn\|name=lcdb-Stephens-2016\|1=Lightcurve plot of (3801) Thrasymedes from Jun 2016 with a period of {{val\|49.55\|0.02}} and Δmag of 1.07, taken by Robert Stephens at the Center for Solar System Studies {{Obscode\|U81}}. Quality code is 2+ (lightcurve rating at CS3). Summary figures at the LCDB and CS3.}} }} References 1. ^¹²³⁴⁵⁶⁷⁸{{cite web \|title = 3801 Thrasymedes (1985 VS) \|work = Minor Planet Center \|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=3801 \|accessdate = 21 June 2018}} 2. ^¹{{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}} 3. ^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}} 4. ^¹²³⁴{{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) 5. ^¹²{{cite web \|title = Asteroid (3801) Thrasymedes – Proper Elements \|publisher = AstDyS-2, Asteroids – Dynamic Site \|url = http://hamilton.dm.unipi.it/astdys/index.php?n=3801&pc=1.1.6 \|access-date= 21 June 2018}} 6. ^¹²{{Cite journal \|author = Milani, Andrea \|date = October 1993 \|title = The Trojan asteroid belt: Proper elements, stability, chaos and families \|url = http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1993CeMDA..57...59M&data_type=PDF_HIGH \|journal = Celestial Mechanics and Dynamical Astronomy \|volume = 57 \|pages = 59–94 \|issn = 0923-2958 \|bibcode = 1993CeMDA..57...59M \|doi = 10.1007/BF00692462 \|access-date= 30 June 2018}} 7. ^¹²{{cite web \|title = Asteroid pairs and clusters \|work = Johnston's Archive \|date = 29 April 2018 \|author = Johnston, Wm. Robert \|url = http://www.johnstonsarchive.net/astro/asteroidpairs.html \|accessdate = 30 June 2018}} 8. ^¹²³⁴⁵{{cite web \|title = LCDB Data for (3801) Thrasymedes \|publisher = Asteroid Lightcurve Database (LCDB) \|url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=3801%7CThrasymedes \|accessdate = 21 June 2018}} 9. ^¹{{Cite journal \|first1 = R. D. \|last1 = Duffard \|first2 = M. \|last2 = Melita \|first3 = J. L. \|last3 = Ortiz \|first4 = J. \|last4 = Licandro \|first5 = I. P. \|last5 = Williams \|first6 = D. \|last6 = Jones \|date = December 2007 \|title = Light-Curve Survey of the Trojan Asteroids \|url = https://www.lpi.usra.edu/meetings/acm2008/pdf/8187.pdf \|journal = Asteroids \|bibcode = 2008LPICo1405.8187D \|access-date= 5 July 2018}} 10. ^¹{{Cite journal \|first1 = M. D. \|last1 = Melita \|first2 = R. \|last2 = Duffard \|first3 = I. P. \|last3 = Williams \|first4 = D. C. \|last4 = Jones \|first5 = J. \|last5 = Licandro \|first6 = J. L. \|last6 = Ortiz \|date = June 2010 \|title = Lightcurves of 6 Jupiter Trojan asteroids \|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010P&SS...58.1035M \|journal = Planetary and Space Science \|volume = 58 \|issue = 7-8 \|pages = 1035–1039 \|bibcode = 2010P&SS...58.1035M \|doi = 10.1016/j.pss.2010.03.009 \|access-date= 21 June 2018}} 11. ^¹{{Cite journal \|first1 = Erin Lee \|last1 = Ryan \|first2 = Benjamin N. L. \|last2 = Sharkey \|first3 = Charles E. \|last3 = Woodward \|date = March 2017 \|title = Trojan Asteroids in the Kepler Campaign 6 Field \|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017AJ....153..116R \|journal = The Astronomical Journal \|volume = 153 \|issue = 3 \|page = 12 \|bibcode = 2017AJ....153..116R \|doi = 10.3847/1538-3881/153/3/116 \|access-date= 21 June 2018}} 12. ^¹²{{Cite journal \|display-authors = 6 \|first1 = Gy. M. \|last1 = Szabó \|first2 = A. \|last2 = Pál \|first3 = Cs. \|last3 = Kiss \|first4 = L. L. \|last4 = Kiss \|first5 = L. \|last5 = Molnár \|first6 = O. \|last6 = Hanyecz \|first7 = E. \|last7 = Plachy \|first8 = K. \|last8 = Sárneczky \|first9 = R. \|last9 = Szabó \|date = March 2017 \|title = The heart of the swarm: K2 photometry and rotational characteristics of 56 Jovian Trojan asteroids \|url = https://arxiv.org/pdf/1609.02760.pdf \|journal = Astronomy and Astrophysics \|volume = 599 \|page = 13 \|bibcode = 2017A&A...599A..44S \|doi = 10.1051/0004-6361/201629401 \|arxiv = 1609.02760 \|access-date= 21 June 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 Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center [https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=3801+Thrasymedes Asteroid 3801 Thrasymedes] at the Small Bodies Data Ferret {{AstDys\|3801}} {{JPL small body}} {{Use dmy dates\|date=June 2018}}{{Minor planets navigator \|3800 Karayusuf \|number=3801 \|3802 Dornburg }}{{Small Solar System bodies}}{{DEFAULTSORT:Thrasymedes}} 5 : Jupiter trojans (Greek camp)\|Discoveries by the Spacewatch project\|Minor planets named from Greek mythology\|Named minor planets\|Astronomical objects discovered in 1985
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Orbit and classification