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- Q155190 subject Q19795229.
- Q155190 subject Q7152520.
- Q155190 subject Q8300362.
- Q155190 subject Q8380136.
- Q155190 subject Q8609786.
- Q155190 subject Q9479025.
- Q155190 absoluteMagnitude "16.0".
- Q155190 abstract "5261 Eureka is the first Mars trojan discovered. It was discovered by David H. Levy and Henry Holt at Palomar Observatory on June 20, 1990 from the Palomar Observatory. It trails Mars (at the L5 point) at a distance varying by only 0.3 AU during each revolution (with a secular trend superimposed, changing the distance from 1.5–1.8 AU around 1850 to 1.3–1.6 AU around 2400). Minimum distances from the Earth, Venus, and Jupiter, are 0.5, 0.8, and 3.5 AU, respectively.Long-term numerical integration shows that the orbit is stable. Kimmo A. Innanen and Seppo Mikkola note that "contrary to intuition, there is clear empirical evidence for the stability of motion around the L4 and L5 points of all the terrestrial planets over a timeframe of several million years".Since the discovery of 5261 Eureka, the Minor Planet Center has recognized three other asteroids as Martian trojans: 1999 UJ7 at the L4 point, 1998 VF31 at the L5 point, and 2007 NS2, also at the L5 point. At least five other asteroids in near-1:1 resonances with Mars have been discovered, but they do not exhibit trojan behavior. They are 2001 FR127, 2001 FG24, (36017) 1999 ND43, 1998 QH56 and (152704) 1998 SD4.The infrared spectrum for 5261 Eureka is typical for an A-type asteroid, but the visual spectrum is consistent with an evolved form of achondrite called an angrite. A-class asteroids are tinted red in hue, with a moderate albedo. The asteroid is located deep within a stable Lagrangian zone of Mars, which is considered indicative of a primordial origin—meaning the asteroid has most likely been in this orbit for much of the history of the Solar System.".
- Q155190 albedo "0.39".
- Q155190 apoapsis "2.4267766584954E11".
- Q155190 averageSpeed "86796.0".
- Q155190 discovered "1990-06-20".
- Q155190 discovered "2011-11-28".
- Q155190 discoverer Q375311.
- Q155190 epoch "December 09 2014".
- Q155190 epoch "November 4, 2013 (JD2456600.5)".
- Q155190 formerName "1990 MB".
- Q155190 orbitalPeriod "34.56".
- Q155190 orbitalPeriod "5.93504928E7".
- Q155190 periapsis "2.131769657475E11".
- Q155190 temperature "250.0".
- Q155190 wikiPageExternalLink h.html.
- Q155190 wikiPageExternalLink eureka.html.
- Q155190 wikiPageExternalLink Item1.
- Q155190 wikiPageExternalLink Item3.
- Q155190 wikiPageExternalLink Item1.
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- Q155190 wikiPageWikiLink Q19795229.
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- Q155190 wikiPageWikiLink Q375311.
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- Q155190 wikiPageWikiLink Q543157.
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- Q155190 wikiPageWikiLink Q665832.
- Q155190 wikiPageWikiLink Q7152520.
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- Q155190 wikiPageWikiLink Q753445.
- Q155190 wikiPageWikiLink Q8300362.
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- Q155190 wikiPageWikiLink Q8380136.
- Q155190 wikiPageWikiLink Q8609786.
- Q155190 wikiPageWikiLink Q9479025.
- Q155190 absMagnitude "16".
- Q155190 albedo "0.39".
- Q155190 altNames "1990 MB".
- Q155190 avgSpeed "24.11".
- Q155190 discovered "1990-06-20".
- Q155190 discovered "2011-11-28".
- Q155190 discoverer "David H. Levy and Henry Holt".
- Q155190 epoch "2013-11-04".
- Q155190 epoch "2014-12-09".
- Q155190 name "5261".
- Q155190 name "S/2011 1".
- Q155190 period "34.56".
- Q155190 singleTemperature "~250 K".
- Q155190 type Place.
- Q155190 type CelestialBody.
- Q155190 type Location.
- Q155190 type Place.
- Q155190 type Planet.
- Q155190 type Thing.
- Q155190 type Q634.
- Q155190 comment "5261 Eureka is the first Mars trojan discovered. It was discovered by David H. Levy and Henry Holt at Palomar Observatory on June 20, 1990 from the Palomar Observatory. It trails Mars (at the L5 point) at a distance varying by only 0.3 AU during each revolution (with a secular trend superimposed, changing the distance from 1.5–1.8 AU around 1850 to 1.3–1.6 AU around 2400).".
- Q155190 label "5261 Eureka".
- Q155190 name "5261 Eureka".
- Q155190 name "S/2011 (5261) 1".