1961 Dufour: Difference between revisions

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{{Infobox planet
{{Infobox planet
| minorplanet = yes
| width = 25em
| name = 1961 Dufour
| bgcolour = #FFFFC0
| background = #FFFFC0
| name = Dufour
| image =
| image =
| caption =
| caption =
| discovery_ref = &thinsp;<ref name="jpldata" />
| discovery = yes
| discovered = 19 November 1973
| discovery_ref =
| discoverer = [[Wild, P.]]
| discoverer = [[Paul Wild (Swiss astronomer)|P. Wild]]
| discovery_site = [[Zimmerwald]]
| discovery_site = [[Zimmerwald Observatory|Zimmerwald Obs.]]
| mp_name = 1961 Dufour
| discovered = November 19, 1973
| alt_names = 1973 WA{{·}}1927 UM<br />{{mp|1952 BQ|1}}{{·}}1962 YG<br />1969 AH{{·}}{{mp|1973 SY|3}}
| designations = yes
| named_after = [[Henri Dufour]]<ref name="springer" />
| mp_name = 1961
| mp_category = [[main-belt]]
| alt_names = 1973 WA
| orbit_ref = &thinsp;<ref name="jpldata" />
| named_after = [[Guillaume Henri Dufour]]
| epoch = 27 June 2015 ([[Julian day|JD]] 2457200.5)
| mp_category =
| orbit_ref =
| uncertainty = 0
| observation_arc = {{nowrap|52.40 yr (19,139 days)}}
| epoch = May 14, 2008
| aphelion = 3.5776215
| aphelion = 3.5901 [[Astronomical unit|AU]]
| perihelion = 2.8141265
| perihelion = 2.8050 AU
| semimajor =
| semimajor = 3.1975 AU
| eccentricity = 0.1194501
| eccentricity = 0.1227
| period = 5.72 [[Julian year (astronomy)|yr]] (2,088 days)
| period = 2086.8099007
| mean_anomaly = 47.995[[degree (angle)|°]]
| avg_speed =
| inclination = 6.64084
| inclination = 6.6413°
| asc_node = 29.74584
| asc_node = 29.634°
| arg_peri = 57.921°
| mean_anomaly = 319.54643
| dimensions = 50.3 km<br />51.2{{efn|name=LCDB}}
| arg_peri = 57.76241
| rotation = 15.79 [[hour|h]]<ref name="geneva-obs" />
| satellites =
| albedo = 0.0402<br />0.039{{efn|name=LCDB}}
| physical_characteristics = yes
| dimensions = 50 km
| spectral_type =
| abs_magnitude = 10.7
| mass =
| density =
| surface_grav =
| escape_velocity =
| sidereal_day = 15.79 h
| axial_tilt =
| pole_ecliptic_lat =
| pole_ecliptic_lon =
| albedo = 0.0402
| temperatures=
| temp_name1 =
| mean_temp_1 =
| max_temp_1 =
| temp_name2 =
| max_temp_2 =
| spectral_type =
| abs_magnitude = 10.7
}}
}}
'''1961 Dufour''' (1973 WA) is a relatively large 50 km [[Asteroid belt|main-belt]] [[asteroid]] discovered on November 19, 1973 by [[Wild, P.]] at [[Zimmerwald]].


'''1961 Dufour''', provisional designation 1973 WA, is a dark and relatively large [[asteroid]] from the [[asteroid belt]], about 50 kilometers in diameter. It was discovered on November 19, 1973 by astronomer [[Paul Wild (Swiss astronomer)|Paul Wild]] at [[Zimmerwald Observatory]] near Bern, Switzerland.<ref name="MPC-Dufour" />
==References==

{{Reflist}}
The asteroid orbits the Sun at a distance of 2.8–3.6 [[Astronomical unit|AU]] once every 5 years and 9 months (2,088 days). It has a rotation period of 15.8 hours and its geometric albedo has been measured to be around 0.04.{{efn|name=LCDB|Diameter and albedo data retrieved from [http://www.minorplanet.info/PHP/lcdbsummaryquery.php MinorPlanet.Info] summary of LCDB Data for (1961) Dufour. Sources: AKARI (October 2011), ''Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey'', {{bibcode|2011PASJ...63.1117U}}, gives a diameter of 51.15 km and an albedo of 0.039.}}
{{Refbegin}}

* Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html
The asteroid is named after Swiss General [[Henri Dufour]] (1787–1875) who swiftly subdued the catholic cantons in the [[Sonderbund War]] with almost no bloodshed. He was also the founder of the [[Swiss Federal Office of Topography]] and initiated and directed the first complete geodetic survey of Switzerland.<ref name="springer" />
{{Refend}}

== Notes ==
{{notelist}}

== References ==
{{reflist
|refs=

<ref name="geneva-obs">{{cite web
|title=Asteroids and comets rotation curves (1961) Dufour
|last=Behrend |first=Raoul
|publisher=Geneva Observatory
|url=http://obswww.unige.ch/~behrend/page4cou.html#001961
|accessdate=October 2015}}</ref>

<ref name="jpldata">{{cite web
|type=2015-05-26 last obs.
|title=JPL Small-Body Database Browser: 1961 Dufour (1973 WA)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001961
|publisher=Jet Propulsion Laboratory
|accessdate=October 2015}}</ref>

<ref name="springer">{{cite book
|url=http://link.springer.com/referenceworkentry/10.1007/978-3-540-29925-7_1962
|title=Dictionary of Minor Planet Names – (1961) Dufour
|last=Schmadel |first=Lutz D.
|publisher=Springer Berlin Heidelberg
|page=158
|date=2003
|isbn=978-3-540-29925-7
|accessdate=October 2015}}</ref>

<ref name="MPC-Dufour">{{cite web
|title=1961 Dufour (1973 WA)
|work=Minor Planet Center
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=1961
|accessdate=October 2015}}</ref>

}} <!-- end of reflist -->

== External links ==
* [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info])
* [https://books.google.se/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
* {{JPL small body|title=1961 Dufour (1973 WA)|id=2001961}}


{{Minor planets navigator|1960 Guisan|1962 Dunant}}
{{Minor planets navigator|1960 Guisan|1962 Dunant}}
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{{DEFAULTSORT:Dufour}}
{{DEFAULTSORT:Dufour}}
[[Category:Main-belt asteroids]]
[[Category:Main-belt asteroids|001961]]
[[Category:Numbered asteroids]]
[[Category:Asteroids named for people]]
[[Category:Asteroids named for people]]
[[Category:Discoveries by Paul Wild (Swiss astronomer)]]
[[Category:Discoveries by Paul Wild (Swiss astronomer)]]
[[Category:Astronomical objects discovered in 1973]]
[[Category:Astronomical objects discovered in 1973|19731119]]


{{Beltasteroid-stub}}
{{Beltasteroid-stub}}

Revision as of 10:54, 26 October 2015

1961 Dufour
Discovery [1]
Discovered byP. Wild
Discovery siteZimmerwald Obs.
Discovery date19 November 1973
Designations
1961 Dufour
Named after
Henri Dufour[2]
1973 WA · 1927 UM
1952 BQ1 · 1962 YG
1969 AH · 1973 SY3
main-belt
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc52.40 yr (19,139 days)
Aphelion3.5901 AU
Perihelion2.8050 AU
3.1975 AU
Eccentricity0.1227
5.72 yr (2,088 days)
47.995°
Inclination6.6413°
29.634°
57.921°
Physical characteristics
Dimensions50.3 km
51.2[a]
15.79 h[3]
0.0402
0.039[a]
10.7

1961 Dufour, provisional designation 1973 WA, is a dark and relatively large asteroid from the asteroid belt, about 50 kilometers in diameter. It was discovered on November 19, 1973 by astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland.[4]

The asteroid orbits the Sun at a distance of 2.8–3.6 AU once every 5 years and 9 months (2,088 days). It has a rotation period of 15.8 hours and its geometric albedo has been measured to be around 0.04.[a]

The asteroid is named after Swiss General Henri Dufour (1787–1875) who swiftly subdued the catholic cantons in the Sonderbund War with almost no bloodshed. He was also the founder of the Swiss Federal Office of Topography and initiated and directed the first complete geodetic survey of Switzerland.[2]

Notes

  1. ^ a b c Diameter and albedo data retrieved from MinorPlanet.Info summary of LCDB Data for (1961) Dufour. Sources: AKARI (October 2011), Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey, Bibcode:2011PASJ...63.1117U, gives a diameter of 51.15 km and an albedo of 0.039.

References

  1. ^ a b "JPL Small-Body Database Browser: 1961 Dufour (1973 WA)" (2015-05-26 last obs.). Jet Propulsion Laboratory. Retrieved October 2015. {{cite web}}: Check date values in: |accessdate= (help)
  2. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1961) Dufour. Springer Berlin Heidelberg. p. 158. ISBN 978-3-540-29925-7. Retrieved October 2015. {{cite book}}: Check date values in: |accessdate= (help)
  3. ^ Behrend, Raoul. "Asteroids and comets rotation curves (1961) Dufour". Geneva Observatory. Retrieved October 2015. {{cite web}}: Check date values in: |accessdate= (help)
  4. ^ "1961 Dufour (1973 WA)". Minor Planet Center. Retrieved October 2015. {{cite web}}: Check date values in: |accessdate= (help)

External links

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