102554 1999 US21 (Asteroid)
From Fairfield , 102554 1999 US21 is not observable – it will reach its highest point in the sky during daytime and is no higher than 2° above the horizon at dusk.
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Name
102554 1999 US21
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Object type
Asteroid
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Current position
| Computed for: | 28 September 2024 |
| Right ascension: | 14h49m [1] |
| Declination: | −18°46' [1] |
| Constellation: | Libra |
| Magnitude: | 21.86 (V) [1] |
| Distance: | 2.98 AU 24.76 lightmin [1] |
| Angular motion (speed): | 13.18 arcmin/day[1] |
| Angular motion (pos ang): | 293.9° |
Orbital elements [1]
| Semi-major axis: | 2.44 AU |
| Eccentricity: | 0.115267 |
| Inclination: | 6.84° |
| Longitude ascending node: | 35.56° |
| Argument of perihelion: | 139.03° |
| Epoch of elements: | 17 October 2024 |
| Mean Anomaly at epoch: | 60.63° |
| Absolute mag (H): | 16.79 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.16 AU |
| Aphelion: | 2.72 AU |
| Orbital period: | 3.82 years |