21604 1999 BS3 (Asteroid)
From South El Monte , 21604 1999 BS3 is visible in the evening sky, becoming accessible around 20:09 (PDT), 31° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 21:54, 37° above your southern horizon. It will continue to be observable until around 00:55, when it sinks below 21° above your south-western horizon.
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Name
21604 1999 BS3
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Object type
Asteroid
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Current position
| Computed for: | 07 September 2025 |
| Right ascension: | 20h12m [1] |
| Declination: | −18°28' [1] |
| Constellation: | Capricornus |
| Magnitude: | 18.89 (V) [1] |
| Distance: | 2.11 AU 17.51 lightmin [1] |
| Angular motion (speed): | 15.79 arcmin/day[1] |
| Angular motion (pos ang): | 259.3° |
Orbital elements [1]
| Semi-major axis: | 2.86 AU |
| Eccentricity: | 0.025795 |
| Inclination: | 2.34° |
| Longitude ascending node: | 161.57° |
| Argument of perihelion: | 302.23° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 166.62° |
| Absolute mag (H): | 14.16 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.78 AU |
| Aphelion: | 2.93 AU |
| Orbital period: | 4.83 years |