21604 1999 BS3 (Asteroid)
Finder chart
Click and drag the chart above to pan around the sky, or use the mouse wheel to zoom.
Click to enlarge.
From South El Monte , 21604 1999 BS3 is visible in the evening sky, becoming accessible around 20:11 (PDT), 31° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 21:58, 37° above your southern horizon. It will continue to be observable until around 01:00, when it sinks below 21° above your south-western horizon.
Begin typing the name of a town near to you, and then select the town from the list of options
which appear below.
|
Name
21604 1999 BS3
|
Object type
Asteroid
|
Current position
| Computed for: | 06 September 2025 |
| Right ascension: | 20h12m [1] |
| Declination: | −18°26' [1] |
| Constellation: | Capricornus |
| Magnitude: | 18.87 (V) [1] |
| Distance: | 2.10 AU 17.43 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 |
Visibility from South El Monte
All times shown in South El Monte local time.