259 Aletheia (Asteroid)
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From South El Monte , 259 Aletheia will become visible at around 20:00 (PDT), 25° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting 3 hours and 57 minutes after the Sun at 22:57.
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Name
259 Aletheia
|
Object type
Asteroid
|
Current position
| Computed for: | 13 September 2025 |
| Right ascension: | 16h44m [1] |
| Declination: | −23°45' [1] |
| Constellation: | Ophiuchus |
| Magnitude: | 13.22 (V) [1] |
| Distance: | 2.69 AU 22.39 lightmin [1] |
| Angular motion (speed): | 13.29 arcmin/day[1] |
| Angular motion (pos ang): | 289.2° |
Orbital elements [1]
| Semi-major axis: | 3.13 AU |
| Eccentricity: | 0.129832 |
| Inclination: | 10.81° |
| Longitude ascending node: | 86.78° |
| Argument of perihelion: | 166.40° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 335.06° |
| Absolute mag (H): | 7.83 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.73 AU |
| Aphelion: | 3.54 AU |
| Orbital period: | 5.55 years |
Visibility from South El Monte
All times shown in South El Monte local time.