509 Iolanda (Asteroid)

Show information for


From South El Monte , 509 Iolanda is not observable – it will reach its highest point in the sky during daytime and is 10° below the horizon at dawn.

Name 509 Iolanda
Object type Asteroid
Current position
Computed for:14 September 2025
Right ascension:10h54m [1]
Declination:−03°21' [1]
Constellation:Leo
Magnitude:14.51 (V) [1]
Distance:4.30 AU
35.75 lightmin [1]
Angular motion (speed):7.21 arcmin/day[1]
Angular motion (pos ang):283.4°
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

Share