“13963 Euphrates”的意思、由来-开放百科全书

Orbit and classification

Euphrates

[4]

It orbits the Sun in the outer main-belt at a distance of 2.5–4.2 AU once every 6 years and 1 month (2,220 days). Its orbit has an eccentricity of 0.26 and an inclination of 1° with respect to the ecliptic. A first precovery was taken at Palomar Observatory in 1971, extending the asteroid's observation arc by 20 years prior to its official discovery observation.^[8]

Physical characteristics

Based on an absolute magnitude of 13.9, it measures between 4 and 10 kilometers in diameter, assuming an albedo in the range of 0.05 to 0.25. Since asteroids in the outer main-belt are mostly of a carbonaceous rather than of a silicaceous composition, with low albedos, typically around 0.06, its diameter is likely to be between 8 and 10 kilometers.^[6]

As of 2017, Euphrates{{'}} effective size, its composition and albedo, as well as its rotation period and shape remain unknown.^[15]

Naming

This minor planet was named after the Euphrates river, that flows through northern Syria and Iraq.^[2]

It is one of the most historically important rivers of Western Asia. The Tigris–Euphrates river system, a major river system, is formed when the two rivers combine at Al Qurnah. The minor planet 13096 Tigris is named after the other river of this system.^[2] The approved naming citation was published by the Minor Planet Center on 6 August 2003 ({{small|M.P.C. 49280}}).^[18]

References

1. ^¹²³⁴{{cite book |title = Dictionary of Minor Planet Names – (13963) Euphrates, Addendum to Fifth Edition: 2003–2005 |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 82 |date = 2006 |isbn = 978-3-540-34360-8 |doi = 10.1007/978-3-540-34361-5_818 |chapter = (13963) Euphrates [3.32, 0.26, 0.9] }}
2. ^¹²{{cite web |title = 13963 Euphrates (1991 PT4) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=13963 |accessdate = 7 April 2016}}
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 = 19 May 2016}}
4. ^¹²{{cite journal |first1 = F. |last1 = Roig |first2 = D. |last2 = Nesvorný |first3 = S. |last3 = Ferraz-Mello |date = September 2002 |title = Asteroids in the 2 : 1 resonance with Jupiter: dynamics and size distribution |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MNRAS.335..417R |journal = Monthly Notices of the Royal Astronomical Society |volume = 335 |issue = 2 |pages = 417–431 |bibcode = 2002MNRAS.335..417R |doi = 10.1046/j.1365-8711.2002.05635.x |access-date= 7 April 2016}}
5. ^¹²{{cite web |title = Absolute Magnitude (H) |publisher = NASA/JPL |url = http://neo.jpl.nasa.gov/glossary/h.html |access-date= 7 April 2016}}
6. ^¹{{cite web |title = LCDB Data for (13963) Euphrates |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=13963%7CEuphrates |accessdate = 5 July 2017}}

External links

(13963) Euphrates at AstDyS, University of Pisa

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 (10001)-(15000) – Minor Planet Center

5 : Griqua asteroids|Discoveries by Eric Walter Elst|Minor planets named for rivers|Named minor planets|Astronomical objects discovered in 1991

词条	13963 Euphrates
释义	Orbit and classification Physical characteristics Naming References External links {{Infobox planet \| minorplanet = yes \| name = 13963 Euphrates \| background = #D6D6D6 \| image = \| image_size = \| caption = \| discovery_ref = \| discovered = 3 August 1991 \| discoverer = E. W. Elst \| discovery_site = La Silla Obs. \| mpc_name = (13963) Euphrates \| pronounced = {{IPAc-en\|j\|uː\|ˈ\|f\|r\|eɪ\|t\|iː\|z}} \| alt_names = {{mp\|1991 PT\|4}}{{·}}{{mp\|1997 TO\|10}} \| named_after = Euphrates ^[2] {{small\|(river in Mesopotamia)}} \| mp_category = main-belt{{·}}{{small\|(outer)}} Griqua ^[4] \| orbit_ref = \| epoch = 4 September 2017 (JD 2458000.5) \| uncertainty = 0 \| observation_arc = 45.98 yr (16,793 days) \| aphelion = 4.1853 AU \| perihelion = 2.4762 AU \| semimajor = 3.3307 AU \| eccentricity = 0.2566 \| period = 6.08 yr (2,220 days) \| mean_anomaly = 84.506° \| mean_motion = {{Deg2DMS\|0.1621\|sup=ms}} / day \| inclination = 0.9360° \| asc_node = 227.18° \| arg_peri = 129.72° \| tisserand = 3.1090 \| dimensions = {{val\|9\|1}} km {{small\|(est. at 0.06)}}^[6] \| rotation = \| albedo = \| spectral_type = \| abs_magnitude = 13.9 }}13963 Euphrates ({{IPAc-en\|j\|uː\|ˈ\|f\|r\|eɪ\|t\|iː\|z}}), provisional designation {{mp\|1991 PT\|4}}, is a resonant Griqua asteroid from the outer region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 3 August 1991, by Belgian astronomer Eric Elst at ESO's La Silla Observatory site in Chile.^[8] The asteroid was named after the Euphrates River in the Middle East.^[2] Orbit and classification Euphrates is one of very few bodies located in the 2:1 mean motion resonance with the gas giant Jupiter and belongs to the "marginally unstable" Griqua group.^[4] It orbits the Sun in the outer main-belt at a distance of 2.5–4.2 AU once every 6 years and 1 month (2,220 days). Its orbit has an eccentricity of 0.26 and an inclination of 1° with respect to the ecliptic. A first precovery was taken at Palomar Observatory in 1971, extending the asteroid's observation arc by 20 years prior to its official discovery observation.^[8] Physical characteristics Based on an absolute magnitude of 13.9, it measures between 4 and 10 kilometers in diameter, assuming an albedo in the range of 0.05 to 0.25. Since asteroids in the outer main-belt are mostly of a carbonaceous rather than of a silicaceous composition, with low albedos, typically around 0.06, its diameter is likely to be between 8 and 10 kilometers.^[6] As of 2017, Euphrates{{'}} effective size, its composition and albedo, as well as its rotation period and shape remain unknown.^[15] Naming This minor planet was named after the Euphrates river, that flows through northern Syria and Iraq.^[2] It is one of the most historically important rivers of Western Asia. The Tigris–Euphrates river system, a major river system, is formed when the two rivers combine at Al Qurnah. The minor planet 13096 Tigris is named after the other river of this system.^[2] The approved naming citation was published by the Minor Planet Center on 6 August 2003 ({{small\|M.P.C. 49280}}).^[18] References 1. ^¹²³⁴{{cite book \|title = Dictionary of Minor Planet Names – (13963) Euphrates, Addendum to Fifth Edition: 2003–2005 \|last = Schmadel \| first = Lutz D. \|publisher = Springer Berlin Heidelberg \|page = 82 \|date = 2006 \|isbn = 978-3-540-34360-8 \|doi = 10.1007/978-3-540-34361-5_818 \|chapter = (13963) Euphrates [3.32, 0.26, 0.9] }} 2. ^¹²{{cite web \|title = 13963 Euphrates (1991 PT4) \|work = Minor Planet Center \|url = http://www.minorplanetcenter.net/db_search/show_object?object_id=13963 \|accessdate = 7 April 2016}} 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 = 19 May 2016}} 4. ^¹²{{cite journal \|first1 = F. \|last1 = Roig \|first2 = D. \|last2 = Nesvorný \|first3 = S. \|last3 = Ferraz-Mello \|date = September 2002 \|title = Asteroids in the 2 : 1 resonance with Jupiter: dynamics and size distribution \|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MNRAS.335..417R \|journal = Monthly Notices of the Royal Astronomical Society \|volume = 335 \|issue = 2 \|pages = 417–431 \|bibcode = 2002MNRAS.335..417R \|doi = 10.1046/j.1365-8711.2002.05635.x \|access-date= 7 April 2016}} 5. ^¹²{{cite web \|title = Absolute Magnitude (H) \|publisher = NASA/JPL \|url = http://neo.jpl.nasa.gov/glossary/h.html \|access-date= 7 April 2016}} 6. ^¹{{cite web \|title = LCDB Data for (13963) Euphrates \|publisher = Asteroid Lightcurve Database (LCDB) \|url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=13963%7CEuphrates \|accessdate = 5 July 2017}} ^[1]^[2]^[3]^[4]^[5]^[6] }} External links (13963) Euphrates at AstDyS, University of Pisa 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 (10001)-(15000) – Minor Planet Center {{JPL small body}} {{Minor planets navigator \|13962 Delambre \|number=13963 \|13964 La Billardière}}{{Small Solar System bodies}}{{DEFAULTSORT:Euphrates}} 5 : Griqua asteroids\|Discoveries by Eric Walter Elst\|Minor planets named for rivers\|Named minor planets\|Astronomical objects discovered in 1991
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