Khác biệt giữa bản sửa đổi của “944 Hidalgo”

<!-- Additional parameters for this template are available atở [[Template:InfoboxThông planettin hành tinh]]. -->{{InfoboxThông tin hành planettinh | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 |

| discovered=October 31 tháng 10, 1920

| mp_category=[[MainVành beltđai chính]],<br>[[Jupiter-crosser asteroid]],<br>[[Saturn-crosser asteroid]]<br>[[Centaur (minor planet)|centaur]]<ref name=jpldata>{{cite web

| epoch=July 14 tháng 7, 2004 ([[JulianNgày dayJulius|JD]] 2453200.5)

| perihelionperiapsis=1.951 AU (291.846 Gm)

| aphelionapoapsis=9.539 [[AstronomicalĐơn unitvị thiên văn|AU]] (1427.003 [[Giga|Gm]])

| period=13.77 [[JulianNăm yearJulius (astronomythiên văn)|a]] (5029.467 [[dayngày||d]])

| inclination=42.567[[degreeđộ (anglegóc)|°]]

| avg_speed=12.43 km/[[secondgiây|s]]

With a high [[eccentricity (orbit)|eccentricity]] of 0.66, its [[perihelionperiapsis]] of 1.95 [[astronomical unit|AU]] takes it to the inner edge of the asteroid belt, while its [[aphelionapoapsis]] of 9.54 AU takes it right out to [[Saturn]]'s orbit, a characteristic normally associated with Saturn's family of comets. Some astronomers therefore suspect that it was once a [[comet]]. Strictly speaking, Hidalgo is a Saturn-grazer rather than a [[Saturn-crosser asteroid|Saturn-crosser]] as its aphelionapoapsis does not clear Saturn's. Hidalgo's severe orbital inclination of 43° is suspected to be the result of a close encounter with Jupiter. Even as recently as 1922, Hidalgo passed within 0.89AU of the powerful influence of Jupiter.<ref name=jpl-close>{{cite web |date=2008-06-10 last obs |title=JPL Close-Approach Data: 944 Hidalgo (1920 HZ) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=944;cad=1#cad |accessdate=2009-05-05}}</ref> Its diameter is estimatedước tínhd to be 38&nbsp;km.<ref name=jpldata/>

==DiscoveryPhát hiện and subsequent studies==

944 Hidalgo was [[discovery (observation)|discovered]] bybởi [[Walter Baade]] on Octoberngày 31 tháng 10, 1920 atở [[Bergedorf Observatory]] near [[Hamburg]], [[Germany]]. It is named for [[Miguel Hidalgo y Costilla]], who was responsible for declaring Mexico's independence in 1810. German astronomers who were in [[Mexico]] to observe a total [[solar eclipse|eclipse]] on Septemberngày 10 tháng 9, 1923, had an audience with [[president of Mexico|President]] [[Álvaro Obregón]]. During this meeting, they asked his permission to name the asteroid after Hidalgo y Costilla.<ref>Schmadel Lutz D. ''Dictionary of Minor Planet NamesTêns'' (fifth edition), Springer, 2003. ISBN 3-540-00238-3.</ref>

In the late 1990s, a network of astronomers worldwide gathered lightcurve data that was ultimately used to derive the spin states and shape models of 10 new asteroids, including (944) Hidalgo.<ref>Durech., J.; Kaasalainen, M., Marciniak, A.; et al., “Physical models of ten asteroids from an observers' collaboration network,” '' Astronomy and Astrophysics '', Volume 465, Issue 1, April I 2007, pp. 331-337</ref><ref>Durech, J.; Kaasalainen, M.; Marciniak, A.; Allen, W. H. et al. “Asteroid brightness and geometry,” ''Astronomy and Astrophysics'', Volume 465, Issue 1, April I 2007, pp. 331-337.</ref> Lightcurve data has also been recorded bybởi observers atở the Antelope Hills Observatory, which has been designated as an official observatory bybởi the [[Minor Planet Center]].<ref>http://www.antelopehillsobservatory.org/Lightcurves/944.gif</ref>

==References Tham khảo ==

[[Category:MainTiểu Belthành asteroidstinh vành đai chính]]

[[Category:DiscoveriesĐược byphát hiện bởi Walter Baade]]

[[Category:AstronomicalThiên objectsthể discoveredphát inhiện năm 1920]]