509 Iolanda (Asteroid)
From South El Monte , 509 Iolanda is not observable – it will reach its highest point in the sky during daytime and is 7° below the horizon at dawn.
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Name
509 Iolanda
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Object type
Asteroid
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Current position
| Computed for: | 18 September 2025 |
| Right ascension: | 10h59m [1] |
| Declination: | −03°50' [1] |
| Constellation: | Leo |
| Magnitude: | 14.53 (V) [1] |
| Distance: | 4.29 AU 35.70 lightmin [1] |
| Angular motion (speed): | 7.21 arcmin/day[1] |
| Angular motion (pos ang): | 283.3° |
Orbital elements [1]
| Semi-major axis: | 3.06 AU |
| Eccentricity: | 0.098020 |
| Inclination: | 15.41° |
| Longitude ascending node: | 217.47° |
| Argument of perihelion: | 155.74° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 101.86° |
| Absolute mag (H): | 8.42 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.76 AU |
| Aphelion: | 3.36 AU |
| Orbital period: | 5.36 years |