397 Vienna (Asteroid)
From South El Monte , 397 Vienna is visible in the dawn sky, rising at 02:55 (PDT) – 3 hours and 51 minutes before the Sun – and reaching an altitude of 30° above the south-eastern horizon before fading from view as dawn breaks at around 05:47.
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Name
397 Vienna
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Object type
Asteroid
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Current position
| Computed for: | 25 March 2026 |
| Right ascension: | 19h43m [1] |
| Declination: | −12°30' [1] |
| Constellation: | Sagittarius |
| Magnitude: | 14.55 (V) [1] |
| Distance: | 2.69 AU 22.38 lightmin [1] |
Orbital elements [1]
| Semi-major axis: | 2.64 AU |
| Eccentricity: | 0.247326 |
| Inclination: | 12.87° |
| Longitude ascending node: | 227.88° |
| Argument of perihelion: | 139.94° |
| Epoch of elements: | 21 Nov 2025 |
| Mean Anomaly at epoch: | 266.14° |
| Absolute mag (H): | 9.35 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 1.98 AU |
| Aphelion: | 3.29 AU |
| Orbital period: | 4.28 years |