Vesta
4 Vesta (A807 FA)
Where is it now
- Distance from Sun
- 2.458 AU
- True anomaly
- 121.55°
- Distance from Earth
- 1.483 AU
- As of
- 2 October 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 01h 37m 15s
- Declination
- -02° 38′ 45″
- Constellation
- Cetus
- Distance from Earth
- 1.48 AU
- Elongation from the Sun
- 163.67° — near opposition — up most of the night
Visible from both hemispheres.
From your location
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 2.361 AU
- Eccentricity
- 0.0902
- Inclination
- 7.14°
- Orbital period
- 3.63 years
- Perihelion
- 2.148 AU
- Aphelion
- 2.574 AU
- Longitude of ascending node
- 103.7°
- Argument of periapsis
- 151.47°
- Epoch · J2000
- 2461200.5
- Orbit class · MBA
- Main-belt asteroid
- Earth MOID · 442.1 LD
- 1.136 AU
- Tisserand (Jupiter)
- 3.535
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 9,451
- Data arc
- 70.48 years
- First observed
- 23 September 1950
- Last observed
- 17 March 2021
- Residual RMS
- 0.4 ″
- Solution · Davide Farnocchia
- 13 April 2021
Physical properties
- Mean radius
- 261 km
- Density
- 3.46 g/cm³
- Rotation period
- 5.34 hours
- GM
- 17.288 km³/s²
- Shape · km
- 569.24 x 554.48 x 452.66
Visual & observation
- Geometric albedo
- 0.423
- Absolute magnitude (H)
- 3.25
- Colour index (B–V)
- 0.78
- Spectral type (SMASS)
- V
- Spectral type (Tholen)
- V
- Colour index (U–B)
- 0.49
Discovery & classification
- Discovered by
- Olbers, H. W.
- Discovery date
- 29 March 1807
- Discovery site
- Bremen
Also known as 4 · A807 FA
Sources
- visual properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB