257 Silesia (Asteroid)
From South El Monte , 257 Silesia is visible in the evening sky, becoming accessible around 19:53 (PDT), 28° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 21:18, 31° above your southern horizon. It will continue to be observable until around 23:46, when it sinks below 21° above your south-western horizon.
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Name
257 Silesia
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Object type
Asteroid
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Current position
| Computed for: | 18 September 2025 |
| Right ascension: | 20h19m [1] |
| Declination: | −24°12' [1] |
| Constellation: | Capricornus |
| Magnitude: | 15.06 (V) [1] |
| Distance: | 2.51 AU 20.84 lightmin [1] |
| Angular motion (speed): | 12.19 arcmin/day[1] |
| Angular motion (pos ang): | 257.3° |
Orbital elements [1]
| Semi-major axis: | 3.12 AU |
| Eccentricity: | 0.112441 |
| Inclination: | 3.61° |
| Longitude ascending node: | 34.04° |
| Argument of perihelion: | 32.09° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 220.26° |
| Absolute mag (H): | 9.72 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.77 AU |
| Aphelion: | 3.47 AU |
| Orbital period: | 5.51 years |