259 Aletheia (Asteroid)
From South El Monte , 259 Aletheia is visible in the evening sky, becoming accessible around 21:18 (PDT), 34° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:29, 37° above your southern horizon. It will continue to be observable until around 01:31, when it sinks below 21° above your south-western horizon.
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Name
259 Aletheia
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Object type
Asteroid
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Current position
| Computed for: | 30 June 2025 |
| Right ascension: | 16h15m [1] |
| Declination: | −18°28' [1] |
| Constellation: | Scorpius |
| Magnitude: | 12.02 (V) [1] |
| Distance: | 1.82 AU 15.13 lightmin [1] |
| Angular motion (speed): | 20.48 arcmin/day[1] |
| Angular motion (pos ang): | 290.4° |
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 |