399 Persephone (Asteroid)
From South El Monte , 399 Persephone is visible in the evening sky, becoming accessible around 19:53 (PDT), 22° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 23:04, 40° above your southern horizon. It will continue to be observable until around 02:21, when it sinks below 21° above your south-western horizon.
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Name
399 Persephone
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Object type
Asteroid
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Current position
| Computed for: | 18 September 2025 |
| Right ascension: | 22h05m [1] |
| Declination: | −15°09' [1] |
| Constellation: | Aquarius |
| Magnitude: | 13.91 (V) [1] |
| Distance: | 2.34 AU 19.46 lightmin [1] |
| Angular motion (speed): | 13.43 arcmin/day[1] |
| Angular motion (pos ang): | 236.9° |
Orbital elements [1]
| Semi-major axis: | 3.05 AU |
| Eccentricity: | 0.076868 |
| Inclination: | 13.11° |
| Longitude ascending node: | 346.18° |
| Argument of perihelion: | 192.38° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 110.09° |
| Absolute mag (H): | 8.93 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.82 AU |
| Aphelion: | 3.29 AU |
| Orbital period: | 5.33 years |