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5261 Eureka is the first Mars trojan discovered. It was discovered by David H. Levy and Henry Holt at Palomar Observatory on 20 June 1990. 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…
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eureka 5261 l5 mars asteroids discovered au 1999 trojan david levy orbit 1998 discovery l4 martian orbital point around stable
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| 5261 Eureka | Absolute magnitude (H) | 16.0, 16.1 | 1.00 | infobox |
| 5261 Eureka | Alternative designations | 1990 MB | 1.00 | infobox |
| 5261 Eureka | Aphelion | 1.6222 AU (242.68 Gm) | 1.00 | infobox |
| 5261 Eureka | Argument of perihelion | 95.456° | 1.00 | infobox |
| 5261 Eureka | Average orbital speed | 24.11 km/s | 1.00 | infobox |
| 5261 Eureka | Dimensions | 1.3 km ~2–4 kmH | 1.00 | infobox |
| 5261 Eureka | Discovered by | David H. Levy and Henry Holt | 1.00 | infobox |
| 5261 Eureka | Discovery date | 20 June 1990 | 1.00 | infobox |
| 5261 Eureka | Earth MOID | 0.497052 AU (74.3579 Gm) | 1.00 | infobox |
| 5261 Eureka | Eccentricity | 0.064766 | 1.00 | infobox |
| 5261 Eureka | Geometric albedo | 0.39 | 1.00 | infobox |
| 5261 Eureka | Inclination | 20.280° | 1.00 | infobox |
| 5261 Eureka | Jupiter MOID | 3.52162 AU (526.827 Gm) | 1.00 | infobox |
| 5261 Eureka | Known satellites | 1 | 1.00 | infobox |
| 5261 Eureka | Longitude of ascending node | 245.057° | 1.00 | infobox |
| 5261 Eureka | Mean anomaly | 145.29° | 1.00 | infobox |
| 5261 Eureka | Mean motion | 0° 31m 26.76s / day | 1.00 | infobox |
| 5261 Eureka | Minor planet category | Martian L5 | 1.00 | infobox |
| 5261 Eureka | Named after | Eureka | 1.00 | infobox |
| 5261 Eureka | Observation arc | 13267 days (36.32 yr) | 1.00 | infobox |
| 5261 Eureka | Orbital period (sidereal) | 1.88 yr (686.89 d) | 1.00 | infobox |
| 5261 Eureka | Perihelion | 1.4249 AU (213.16 Gm) | 1.00 | infobox |
| 5261 Eureka | Pronunciation | /jʊˈriːkə/ yuurr-EE-kə | 1.00 | infobox |
| 5261 Eureka | Semi-major axis | 1.5236 AU (227.93 Gm) | 1.00 | infobox |
| 5261 Eureka | Spectral type | S(I) (Gaffey) | 1.00 | infobox |
| 5261 Eureka | Synodic rotation period | 2.6902 h (0.11209 d) | 1.00 | infobox |
| 5261 Eureka | Temperature | ~250 K | 1.00 | infobox |
| 5261 Eureka | TJupiter | 4.428 | 1.00 | infobox |
| 5261 Eureka | is a | first Mars trojan discovered | 0.90 | text |
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