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Encyclopedia > 2002 AA29

2002 AA29
Discoverer LINEAR
Discovery Date January 9, 2002
Alternate Designations  
Category Aten asteroid
Orbital Elements
Epoch November 22, 2002 (JD 2452600.5)
Eccentricity (e) 0.012
Semi-Major Axis (a) 149.588 Gm (1.000 AU)
Perihelion (q) 147.735 Gm (0.988 AU)
Aphelion (Q) 151.442 Gm (1.012 AU)
Orbital Period (P) 365.222 d (1.00 a)
Mean Orbital Speed 29.784 km/s
Inclination (i) 10.739
Longitude of the
Ascending Node
Argument of Perihelion (ω) 91.594
Mean Anomaly (M) 225.947
Physical Characteristics
Dimensions ~0.06 km
Mass ~2.3108 kg
Density 2 ? g/cm
Surface Gravity ~0.000 017 m/s
Escape Velocity ~0.000 032 km/s
Rotation Period  ? d
Spectral Class  ?
Absolute Magnitude 24.08
Albedo 0.1 ?
Mean Surface Temperature ~384 K

Asteroid 2002 AA29 (also written 2002 AA29) is a near-Earth asteroid discovered in January 2001 by the LINEAR asteroid survey. The asteroid follows a "horseshoe orbit" that makes it come near the Earth every 95 years as it follows Earth's orbit around the Sun and will, in nearly 600 years, appear to orbit the planet. It measures about 60 metres across.

Quasi-satellite orbit of 2002 AA29 viewed from Earth's co-rotating frame. Illustration by Paul Wiegert.

On January 8, 2003, the asteroid came within approximately 5.9 Gm (3.7 million miles) of Earth, its closest approach for almost a century.

Richard Gott and Edward Belbruno from Princeton University have speculated that 2002 AA29 might have formed together with Earth and Theia, the postulated planet that, according to the Giant Impact theory collided with Earth in its early history.

The orbit of the asteroid makes it relatively easy to retrieve rock samples and bring them to Earth for analysis.

External links

The Minor Planets
Vulcanoids | Main belt | Groups and Families | Near-Earth objects | Jupiter Trojans
Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper Belt | Oort Cloud
(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)
(For a complete listing, see: List of asteroids)

  Results from FactBites:
Earth Coorbital Asteroid 2002 AA29 (1988 words)
Asteroid 2002 AA29 was discovered by the LINEAR asteroid search program in January 2001.
2002 AA29 is the fuzzy dot that can be seen drifting along against the background stars (the line it moves along was added in post-processing).
The discovery report of 2002 AA29, courtesy of the Minor Planet Center.
  More results at FactBites »



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