Where is it now
- Distance from Sun
- 2.543 AU
- True anomaly
- 299.39°
- Distance from Earth
- 2.592 AU
- As of
- 21 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
- 09h 06m 42s
- Declination
- +22° 48′ 49″
- Constellation
- Cancer
- Distance from Earth
- 2.59 AU
- Elongation from the Sun
- 76.15° — well clear of the Sun
Favours the northern hemisphere; low or below the horizon from far south.
From your location
See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.
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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
- 2.591 AU
- Eccentricity
- 0.0361
- Inclination
- 6.43°
- Orbital period
- 4.17 years
- Perihelion
- 2.498 AU
- Aphelion
- 2.685 AU
- Longitude of ascending node
- 38.72°
- Argument of periapsis
- 131.9°
- Epoch · J2000
- 2461200.5
- Orbit class · MBA
- Main-belt asteroid
- Earth MOID · 586.2 LD
- 1.5063 AU
- Tisserand (Jupiter)
- 3.41
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 10,206
- Data arc
- 141.1 years
- First observed
- 23 January 1885
- Last observed
- 17 March 2026
- Residual RMS
- 0.26 ″
- Solution · Otto Matic
- 5 June 2026
Physical properties
- Mean radius
- 20 km
- Rotation period
- 9.86 hours
Visual & observation
- Geometric albedo
- 0.233
- Absolute magnitude (H)
- 9.32
- Colour index (B–V)
- 0.87
- Spectral type (SMASS)
- Sl
- Spectral type (Tholen)
- S
- Colour index (U–B)
- 0.5
Discovery & classification
- Discovered by
- Palisa, J.
- Discovery date
- 1 November 1875
- Discovery site
- Pola
Also known as 151 · A875 VA · 1974 QS2 · 1974 QZ2
Sources
- visual 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