221 Eos (Asteroid)
From South El Monte , 221 Eos will become visible at around 17:48 (PST), 24° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting 3 hours and 31 minutes after the Sun at 20:15.
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Name
221 Eos
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Object type
Asteroid
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Current position
| Computed for: | 16 December 2025 |
| Right ascension: | 20h54m [1] |
| Declination: | −18°10' [1] |
| Constellation: | Capricornus |
| Magnitude: | 13.31 (V) [1] |
| Distance: | 3.29 AU 27.34 lightmin [1] |
Orbital elements [1]
| Semi-major axis: | 3.01 AU |
| Eccentricity: | 0.101059 |
| Inclination: | 10.89° |
| Longitude ascending node: | 141.71° |
| Argument of perihelion: | 192.48° |
| Epoch of elements: | 21 Nov 2025 |
| Mean Anomaly at epoch: | 348.95° |
| Absolute mag (H): | 7.71 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.71 AU |
| Aphelion: | 3.32 AU |
| Orbital period: | 5.23 years |