221 Eos (Asteroid)
From South El Monte , 221 Eos is visible in the evening sky, becoming accessible around 20:19 (PDT), 36° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 21:13, 38° above your southern horizon. It will continue to be observable until around 00:19, when it sinks below 21° above your south-western horizon.
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Name
221 Eos
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Object type
Asteroid
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Current position
| Computed for: | 31 August 2025 |
| Right ascension: | 19h03m [1] |
| Declination: | −17°35' [1] |
| Constellation: | Sagittarius |
| Magnitude: | 12.38 (V) [1] |
| Distance: | 2.01 AU 16.76 lightmin [1] |
| Angular motion (speed): | 17.55 arcmin/day[1] |
| Angular motion (pos ang): | 272.9° |
Orbital elements [1]
| Semi-major axis: | 3.01 AU |
| Eccentricity: | 0.101244 |
| Inclination: | 10.89° |
| Longitude ascending node: | 141.72° |
| Argument of perihelion: | 192.51° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 292.39° |
| Absolute mag (H): | 7.76 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.71 AU |
| Aphelion: | 3.32 AU |
| Orbital period: | 5.23 years |