Pallas
2 Pallas (A802 FA)
Where is it now
- Distance from Sun
- 2.818 AU
- True anomaly
- 252.48°
- Distance from Earth
- 1.859 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 23m 05s
- Declination
- -13° 13′ 59″
- Constellation
- Cetus
- Distance from Earth
- 1.86 AU
- Elongation from the Sun
- 159.36° — well clear of the Sun
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
- 2.77 AU
- Eccentricity
- 0.2307
- Inclination
- 34.93°
- Orbital period
- 4.61 years
- Perihelion
- 2.131 AU
- Aphelion
- 3.408 AU
- Longitude of ascending node
- 172.89°
- Argument of periapsis
- 310.97°
- Epoch · J2000
- 2461200.5
- Orbit class · MBA
- Main-belt asteroid
- Earth MOID · 477.4 LD
- 1.2268 AU
- Tisserand (Jupiter)
- 3.043
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 9,772
- Data arc
- 221.3 years
- First observed
- 27 August 1804
- Last observed
- 14 December 2025
- Residual RMS
- 0.36 ″
- Solution · Otto Matic
- 5 June 2026
Physical properties
- Mean radius
- 257 km
- Density
- 2.89 g/cm³
- Rotation period
- 7.81 hours
- GM
- 13.63 km³/s²
- Shape · km
- 568x532x448
Visual & observation
- Geometric albedo
- 0.155
- Absolute magnitude (H)
- 4.12
- Colour index (B–V)
- 0.64
- Spectral type (SMASS)
- B
- Spectral type (Tholen)
- B
- Colour index (U–B)
- 0.28
Discovery & classification
- Discovered by
- Olbers, H. W.
- Discovery date
- 28 March 1802
- Discovery site
- Bremen
Also known as 2 · A802 FA
Close approaches 4 on record
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2081-08-13 10:58:00 | Juptr | 1.8513 AU | 720.5 LD | 9 km/s |
| 2164-08-25 07:54:00 | Juptr | 1.8581 AU | 723.1 LD | 9 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
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